<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>35479</id>
    <completedYear/>
    <publishedYear>2016</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>31</pageFirst>
    <pageLast>35</pageLast>
    <pageNumber/>
    <edition/>
    <issue>1</issue>
    <volume>58</volume>
    <type>article</type>
    <publisherName>Carl Hanser Verlag</publisherName>
    <publisherPlace>München</publisherPlace>
    <creatingCorporation>Carl Hanser Verlag GmbH &amp; Co. KG</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Parameters in lock-in thermography of CFRP laminates</title>
    <abstract language="eng">Active thermography with lock-in excitation is a non-destructive testing method that is also feasible for testing of carbon fiber reinforced polymers (CFRP). For validating the method extensive investigations were done during a research project in order to advance a standardization process.&#13;
The most important parameters of optical and ultrasonic excitation thermography were investigated. For example, the appropriate selection of spectral sensitivity of the used infrared camera systems is important for recording undisturbed thermal signals. Regarding excitation, &#13;
influences of excitation power and ultrasonic frequency were studied. Furthermore, material parameters such as CFRP layup are known for strongly affecting the results of&#13;
measurement.</abstract>
    <parentTitle language="eng">Materials Testing</parentTitle>
    <identifier type="doi">10.3139/120.110814</identifier>
    <identifier type="issn">0025-5300</identifier>
    <enrichment key="date_peer_review">28.04.2016</enrichment>
    <author>Philipp Myrach</author>
    <author>Christiane Maierhofer</author>
    <author>M. Rahammer</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Standardisierung</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Lock-in thermography</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Lock-in Thermografie</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>CFRP</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>CFK</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>optical excitation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>ultrasonic excitation</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Ultraschall</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>standardization</value>
    </subject>
    <collection role="ddc" number="543">Analytische Chemie</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>31260</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1624</pageFirst>
    <pageLast>1630</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>1581</volume>
    <type>conferenceobject</type>
    <publisherName>AIP Publishing</publisherName>
    <publisherPlace/>
    <creatingCorporation>American institute of physics (AIP)</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Influence of the acquisition parameters on the performance of laser-thermography for crack detection in metallic components</title>
    <abstract language="eng">We present a systematic study on the performance of laser-thermography for the detection of surface cracks in metallic components. Scanning a metallic surface with laser causes local heating that is mapped simultaneously by an IR-camera and allows identifying cracks with sub-µm openings. The detectability, however, depends on a number of acquisition parameters (e.g. scanning speed, laser power, IR-camera resolution) that typically relate on each other. Most importantly, the detection-sensitivity of surface breaking cracks is given by a particular combination for the acquisition parameter values. As a result, this sensitivity is adaptable within wide ranges allowing the detection of cracks with openings ranging from 200 to 0.1 µm at testing speeds of 100 to 0.05 cm²/s. By examining artificial as well as fatigue cracks, we demonstrate that the method can be even applied to shiny surfaces with no need of pretreatments, which makes it an entirely contactless, remote and automatable NDT technique. A comparison with magnetic particle testing shows that laser-thermography has the potential to become a strong competitor to conventional surface inspection methods in the future.</abstract>
    <parentTitle language="eng">40th Annual review of progress in quantitative nondestructive evaluation (Proceedings)</parentTitle>
    <identifier type="old">34266</identifier>
    <identifier type="isbn">978-0-7354-1212-5</identifier>
    <identifier type="isbn">978-0-7354-1211-8</identifier>
    <identifier type="doi">10.1063/1.4865018</identifier>
    <identifier type="issn">0094-243X</identifier>
    <note>Serientitel: AIP conference proceedings – Series title: AIP conference proceedings</note>
    <enrichment key="eventName">40th Annual review of progress in quantitative nondestructive evaluation</enrichment>
    <enrichment key="eventPlace">Baltimore, Maryland, USA</enrichment>
    <enrichment key="eventStart">21.07.2013</enrichment>
    <enrichment key="eventEnd">26.07.2013</enrichment>
    <enrichment key="date_peer_review">28.08.2014</enrichment>
    <author>Philipp Myrach</author>
    <author>Mathias Ziegler</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Thermography</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Laser-thermography</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Crack detection</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>21571</id>
    <completedYear/>
    <publishedYear>2009</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>1</pageFirst>
    <pageLast>7</pageLast>
    <pageNumber/>
    <edition/>
    <issue>Vortrag 19</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace>Berlin</publisherPlace>
    <creatingCorporation>Deutsche Gesellscahft für Zerstörungsfreie Prüfung e.V. (DGZfP)</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Charakterisierung von Rissen mittels Laser angeregter aktiver Thermografie</title>
    <parentTitle language="deu">Thermographie-Kolloquium 2009</parentTitle>
    <identifier type="old">24008</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">Thermographie-Kolloquium 2009</enrichment>
    <enrichment key="eventPlace">Stuttgart, Germany</enrichment>
    <enrichment key="eventStart">2009-10-08</enrichment>
    <enrichment key="eventEnd">2009-10-09</enrichment>
    <author>Joachim Schlichting</author>
    <author>Guram N. Kervalishvili</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>22973</id>
    <completedYear/>
    <publishedYear>2010</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>10</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>European federation for non-destructive testing (EFNDT)</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Heat transfer modeling of local thermal excitation for surface crack detection and characterization</title>
    <abstract language="eng">In the presented paper the use of local excitation (laser beam) for crack detection and
characterization is simulated. As we could see, using the temperature differences between two
reference points was large enough to detect and characterize the crack, even for such small value of
laser power as 2 W. The influence of radiation and convection on the temperature difference was
negligible (about 0.1%). The influence of heat conduction, in case of crack with air, was very small
(about 3%). The main mechanism which influences the temperature differences between the
reference points is the heat conduction in steel. From the presented results one can see that
temperature differences are increasing with an increase of the crack depth or the crack length. Better
resolution and characterization of the crack depths and lengths should be achieved with increased
duration of heating time or the laser power. We could also see that the best position for the laser
spot to characterize the crack is the closest one. Also, comparison of 2D and 3D simulation results
for circular heat source used as local excitation mechanism had showed that only full 3D modelling
will allow accomplishing a quantitative level of comparison between experimental and simulation
results.</abstract>
    <parentTitle language="eng">ECNDT 2010 - 10th European conference on non-destructive testing (Proceedings)</parentTitle>
    <identifier type="old">25535</identifier>
    <identifier type="isbn">978-1-617-82791-4</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">ECNDT 2010 - 10th European conference on non-destructive testing</enrichment>
    <enrichment key="eventPlace">Moscow, Russia</enrichment>
    <enrichment key="eventStart">2010-06-07</enrichment>
    <enrichment key="eventEnd">2010-06-11</enrichment>
    <author>Guram N. Kervalishvili</author>
    <author>Joachim Schlichting</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Thermography</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Heat transfer modeling</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Surface crack</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
  <doc>
    <id>20096</id>
    <completedYear/>
    <publishedYear>2009</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>8</pageLast>
    <pageNumber/>
    <edition/>
    <issue>DGZfP-BB 119-CD (Poster 02)</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace>Berlin</publisherPlace>
    <creatingCorporation>Deutsche Gesellscahft für Zerstörungsfreie Prüfung e.V. (DGZfP)</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">FEM modelling of heat transfer in the vicinity of vertical surface cracks using local thermal excitation</title>
    <parentTitle language="eng">Thermographie-Kolloquium 2009</parentTitle>
    <identifier type="old">22377</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">Thermographie-Kolloquium 2009</enrichment>
    <enrichment key="eventPlace">Stuttgart, Germany</enrichment>
    <enrichment key="eventStart">2009-10-08</enrichment>
    <enrichment key="eventEnd">2009-10-09</enrichment>
    <author>Guram N. Kervalishvili</author>
    <author>Joachim Schlichting</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>FEM modelling</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Active thermography</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Laser excitation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Cracks</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Steel</value>
    </subject>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>20333</id>
    <completedYear/>
    <publishedYear>2009</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>261</pageFirst>
    <pageLast>270</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bookpartcollection</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>German Society for NDT</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Defect sizing by local excitation thermography</title>
    <parentTitle language="eng">5th International workshop of NDT experts - NDT in progress 2009 (Proceedings)</parentTitle>
    <identifier type="old">22624</identifier>
    <identifier type="isbn">978-80-214-3968-9</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">5th International workshop of NDT experts - NDT in progress 2009</enrichment>
    <enrichment key="eventPlace">Prague, Czech Republic</enrichment>
    <enrichment key="eventStart">2009-10-12</enrichment>
    <enrichment key="eventEnd">2009-10-14</enrichment>
    <author>Joachim Schlichting</author>
    <author>Guram N. Kervalishvili</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Thermography</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Laser excitation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>FEM modeling</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Crack sizing</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
  <doc>
    <id>19438</id>
    <completedYear/>
    <publishedYear>2009</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1505</pageFirst>
    <pageLast>1511</pageLast>
    <pageNumber/>
    <edition/>
    <issue>1096</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>American Institute of Physics</publisherName>
    <publisherPlace>Melville, NY</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Influence of surface properties on the detection and quantification of voids in concrete structures using active thermography</title>
    <abstract language="eng">Impulse thermography is an active method for quantitative investigations of the near
surface region of various structures. It has recently been applied and optimized to applications in civil
engineering. For quantitative analysis of data recorded on the building site, the problems are manifold.
Here, the influence of the different surface properties on the detection and characterization of voids
and honeycombing simulated by polystyrene cubes and cubes prepared of porous concrete are
demonstrated.</abstract>
    <parentTitle language="eng">Review of progress in quantitative nondestructive evaluation, volume 28</parentTitle>
    <identifier type="old">21667</identifier>
    <identifier type="isbn">978-0-7354-0629-2</identifier>
    <identifier type="issn">0743-0760</identifier>
    <identifier type="issn">0094-243X</identifier>
    <note>Serientitel: AIP conference proceedings – Series title: AIP conference proceedings</note>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">35th Annual Review of Progress in Quantitative Nondestructive Evaluation</enrichment>
    <enrichment key="eventPlace">Chicago, IL, USA</enrichment>
    <enrichment key="eventStart">2008-07-20</enrichment>
    <enrichment key="eventEnd">2008-07-25</enrichment>
    <enrichment key="date_peer_review">28.05.2009</enrichment>
    <author>Christiane Maierhofer</author>
    <author>Mathias Röllig</author>
    <author>Ralf Arndt</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Active thermography</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Pulse phase thermography</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Surface properties</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Emissivity</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Concrete</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Voids</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Honeycombing</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
  <doc>
    <id>20655</id>
    <completedYear/>
    <publishedYear>2009</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>67</pageFirst>
    <pageLast>76</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>bookpartcollection</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>University of Debrecen, Faculty of Engineering</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Defect sizing by local excitation thermography</title>
    <parentTitle language="eng">15th International conference "Building services, mechanical and building industry days" (Proceedings)</parentTitle>
    <identifier type="old">22967</identifier>
    <identifier type="isbn">978-963-473-315-7</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">15th International conference "Building services, mechanical and building industry days"</enrichment>
    <enrichment key="eventPlace">Debrecen, Hungary</enrichment>
    <enrichment key="eventStart">2009-10-15</enrichment>
    <enrichment key="eventEnd">2009-10-16</enrichment>
    <author>Joachim Schlichting</author>
    <author>Guram N. Kervalishvili</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Thermography</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Laser excitation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>FEM Modeling</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Crack sizing</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
  <doc>
    <id>21869</id>
    <completedYear/>
    <publishedYear>2010</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>1</pageFirst>
    <pageLast>8</pageLast>
    <pageNumber/>
    <edition/>
    <issue>DGZfP-BB 122 (Mi.1.C.2)</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace>Berlin</publisherPlace>
    <creatingCorporation>Deutsche Gesellschaft für Zerstörungsfreie Prüfung e.V. (DGZfP)</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Geometrische Charakterisierung von Fehlstellen mittels lokal angeregter aktiver Thermografie</title>
    <abstract language="deu">In diesem Beitrag wird eine Methode zur Charakterisierung von
offenen Oberflächenrissen mittels aktiver Thermografie präsentiert. Hierzu wird die
Probe ortsfest lokal mit einem Laser erwärmt und die resultierende
Oberflächentemperatur mittels Infrarotkamera aufgenommen. Bei einer ungestörten
Probe ergibt sich ein rotationssymmetrisches Temperaturprofil. Betrachtet man
hingegen einen Bereich mit einem Oberflächenriss, so kommt es durch die Störung
des lateralen Wärmetransports zu einer unsymmetrischen Temperaturverteilung.
Durch die quantitative Analyse diese Unsymmetrie lassen sich Aussagen über
geometrische Parameter des Risses treffen.</abstract>
    <parentTitle language="deu">DGZfP-Jahrestagung 2010</parentTitle>
    <identifier type="old">24331</identifier>
    <identifier type="isbn">978-3-940283-26-9</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">DGZfP-Jahrestagung 2010</enrichment>
    <enrichment key="eventPlace">Erfurt, Deutschland</enrichment>
    <enrichment key="eventStart">2010-05-10</enrichment>
    <enrichment key="eventEnd">2010-05-12</enrichment>
    <author>Joachim Schlichting</author>
    <author>Guram N. Kervalishvili</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
  <doc>
    <id>21855</id>
    <completedYear/>
    <publishedYear>2010</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>682</pageFirst>
    <pageLast>687</pageLast>
    <pageNumber/>
    <edition/>
    <issue>Paper 120</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>VDE Verlag GmbH</publisherName>
    <publisherPlace>Berlin, Offenbach</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Geometrische Charakterisierung von Fehlstellen mittels lokal angeregter aktiver Thermografie / Characterizing geometrical parameters of voids with locally excited active thermography</title>
    <parentTitle language="deu">Sensoren und Messsysteme 2010 - 15. ITG/GMA-Fachtagung</parentTitle>
    <identifier type="old">24316</identifier>
    <identifier type="isbn">978-3-8007-3260-9</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">Sensoren und Messsysteme 2010 - 15. ITG/GMA-Fachtagung</enrichment>
    <enrichment key="eventPlace">Nürnberg, Deutschland</enrichment>
    <enrichment key="eventStart">2010-05-18</enrichment>
    <enrichment key="eventEnd">2010-05-19</enrichment>
    <author>Joachim Schlichting</author>
    <author>Guram N. Kervalishvili</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
  <doc>
    <id>21957</id>
    <completedYear/>
    <publishedYear>2010</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>773</pageFirst>
    <pageLast>780</pageLast>
    <pageNumber/>
    <edition/>
    <issue>QIRT 2010-121</issue>
    <volume/>
    <type>bookpartcollection</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Defect sizing by local excitation thermography</title>
    <abstract language="eng">In this article, we present a measurement procedure to gain information about depth and angle of open surface cracks. The method is based on a local excitation with, e.g., a laser. The resulting surface temperature is recorded with an infrared camera. Based on this data, crack-caused anisotropies in the lateral heat flow can be detected and exploited to characterise the cracks.
The experimental set-up is based on a Nd:YAG laser. The beam is focused on the test sample by using an optical scanner to generate the required lateral heat flow. The time resolved temperature distribution is recorded with a high-speed infrared camera (InSb FPA, 3 to 5 µm) providing a frame rate of up to 500 Hz.
Up to now, only qualitative information was gained from measurements of this type. Whereas the local transient behaviour of temperature distribution provides also quantitative information of the crack parameters. The general concept of the method presented herein has already been published [1], but the mentioned publication is focused on the crack depth only.
In this paper, we can show that it is possible to simultaneously resolve the angle and depth and, in particular, the depth of non-perpendicular cracks.</abstract>
    <parentTitle language="eng">QIRT 10 - 10th International conference on Quantitative InfraRed Thermography</parentTitle>
    <identifier type="old">24426</identifier>
    <identifier type="isbn">978-2-9809199-1-6</identifier>
    <identifier type="url">http://qirt.gel.ulaval.ca/archives/qirt2010/papers/QIRT%202010-121.pdf</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="eventName">QIRT 10 - 10th International conference on Quantitative InfraRed Thermography</enrichment>
    <enrichment key="eventPlace">Québec, Canada</enrichment>
    <enrichment key="eventStart">2010-07-27</enrichment>
    <enrichment key="eventEnd">2010-07-30</enrichment>
    <author>Joachim Schlichting</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>FEM</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Risse</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Thermografie</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
  <doc>
    <id>24254</id>
    <completedYear/>
    <publishedYear>2011</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>51</pageFirst>
    <pageLast>63</pageLast>
    <pageNumber/>
    <edition/>
    <issue>1</issue>
    <volume>8</volume>
    <type>article</type>
    <publisherName>Lavoisier</publisherName>
    <publisherPlace>Cachan Cedex</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Defect sizing by local excitation thermography</title>
    <abstract language="eng">In this article, we present a measurement procedure to gain information about depth and angle of surface braking cracks. The method is based on a local excitation with, e.g., a laser. The resulting surface temperature is recorded with an infrared camera. Based on this data, crack-caused anisotropies in the lateral heat flow can be detected and exploited to characterise the cracks. The experimental set-up is based on a Nd:YAG laser for heating and a high-speed infrared camera (InSb FPA, 3 to 5 µm) providing a frame rate of up to 500 Hz. Up to now, only qualitative information was gained from measurements of this type, whereas the local transient behaviour of temperature distribution provides also quantitative information of the crack parameters. Using FEM simulation we can show herein that it is possible to simultaneously resolve the angle and depth and, in particular, the depth of non-perpendicular cracks.</abstract>
    <parentTitle language="eng">QIRT Journal</parentTitle>
    <identifier type="old">26890</identifier>
    <identifier type="doi">10.3166/qirt.8.51-63</identifier>
    <identifier type="issn">1768-6733</identifier>
    <enrichment key="date_peer_review">08.09.2011</enrichment>
    <author>Joachim Schlichting</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Surface braking cracks</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Crack sizing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>FEM</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Laser thermography</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>24255</id>
    <completedYear/>
    <publishedYear>2011</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>119</pageFirst>
    <pageLast>123</pageLast>
    <pageNumber/>
    <edition/>
    <issue>1</issue>
    <volume>8</volume>
    <type>article</type>
    <publisherName>Lavoisier</publisherName>
    <publisherPlace>Cachan Cedex</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Efficient data evaluation for thermographic crack detection</title>
    <abstract language="eng">We present an all-purpose crack detection algorithm for flying spot thermography which is directly applicable to a thermogram sequence without the need of any additional information about the experimental setup. A single image containing distinct crack signatures is derived in two steps. Firstly, the spatial derivative is calculated for each frame of the sequence and, secondly, the resulting data set is sorted pixel wise along the time axis. The feasibility of the proposed procedure is proven by testing a piece of rail that comprises roll contact fatigue cracks and by comparing the results with magnetic particle testing.</abstract>
    <parentTitle language="eng">QIRT Journal</parentTitle>
    <identifier type="old">26891</identifier>
    <identifier type="issn">1768-6733</identifier>
    <enrichment key="date_peer_review">08.09.2011</enrichment>
    <author>Joachim Schlichting</author>
    <author>Mathias Ziegler</author>
    <author>Anika Dey</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Active thermography</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Laser scanner</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Railway</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Roll contact fatigue</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Open surface cracks</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>24622</id>
    <completedYear/>
    <publishedYear>2011</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>1</pageFirst>
    <pageLast>6</pageLast>
    <pageNumber/>
    <edition/>
    <issue>DGZfP-BB 130 (Vortrag 09)</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>Deutsche Gesellschaft für zerstörungsfreie Prüfung e.V. (DGZfP)</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Kameragestütztes Flying-Spot-Verfahren zur Risserkennung</title>
    <abstract language="deu">In dieser Arbeit wird ein kameragestütztes Verfahren zur Flying-&#13;
Spot-Thermografie vorgestellt. Die Anregung wird über einen Diodenlaser mit einem optischen Scanner realisiert. Bei der Auswertung kommt ein effizienter und robuster Algorithmus zum Einsatz, der direkt auf die mit der Kamera aufgenommene Thermografiesequenz angewendet werden kann, ohne auf eine&#13;
Synchronisation zwischen Kamera und Lasersystem angewiesen zu sein. Daher eignet sich diese Herangehensweise besonders zur Nachrüstung bestehender Thermografiesysteme.&#13;
Die prinzipielle Eignung dieser Methode wird anhand einer Messung an einem Schienenstück mit Rollkontaktermüdungsrissen gezeigt. Als Referenzverfahren werden die Magnetpulverprüfung und eine auf GMR (Giant Magnetoresistance)- Sensoren basierende Streufeldmessung herangezogen. Mit dem thermografischen Verfahren konnten sämtliche enthaltenen Fehler erkannt werden. Dabei wurden Risse im mm-Abstand getrennt nachgewiesen, was etwa der geometrischen Auflösung der eingesetzten Kamera entspricht.</abstract>
    <parentTitle language="deu">Thermographie-Kolloquium 2011</parentTitle>
    <identifier type="old">27297</identifier>
    <identifier type="isbn">978-3-940283-36-8</identifier>
    <identifier type="urn">urn:nbn:de:kobv:b43-246220</identifier>
    <enrichment key="eventName">Thermographie-Kolloquium 2011</enrichment>
    <enrichment key="eventPlace">Stuttgart, Germany</enrichment>
    <enrichment key="eventStart">29.09.2011</enrichment>
    <enrichment key="eventEnd">30.09.2011</enrichment>
    <licence>Creative Commons - CC BY-ND - Namensnennung - Keine Bearbeitungen 4.0 International</licence>
    <author>Joachim Schlichting</author>
    <author>Mathias Ziegler</author>
    <author>Matthias Pelkner</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Flying-Spot Thermografie</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Diodenlaser</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Rissortung</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Magnetpulverprüfung</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>GMR-Sensoren</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei für die Öffentlichkeit verfügbar ("Open Access")</collection>
    <collection role="unnumberedseries" number="">Wissenschaftliche Artikel der BAM</collection>
    <thesisPublisher>Bundesanstalt für Materialforschung und -prüfung (BAM)</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-bam/files/24622/v09.pdf</file>
  </doc>
  <doc>
    <id>24991</id>
    <completedYear/>
    <publishedYear>2011</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>1</pageFirst>
    <pageLast>7</pageLast>
    <pageNumber/>
    <edition/>
    <issue>DGZfP-BB 127 (Di.1.C.3)</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>Deutsche Gesellschaft für Zerstörungsfreie Prüfung (DGZfP)</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Thermografische Prüfung von Punktschweißverbindungen</title>
    <abstract language="deu">Vor allem in der Automobilindustrie wird das Widerstandpunktschweißen im großen Unfang zur Verbindung von Blechen im Karosseriebau verwendet. Durch den anhaltenden Trend zum Leichtbau und den immer höheren Anforderungen an die passive Sicherheit kommt es hier zu einem verstärkten Einsatz innovativer hochfester Stähle. Obwohl es sich beim Punktschweißen um ein lange erprobtes Verfahren handelt, das sich anhand der Prozessparameter und regelmäßiger zerstörender Prüfung überwachen lässt, ist durch diese Entwicklung die Suche nach geeigneten zerstörungsfreien Prüfverfahren wieder aktuell. Wegen der hohen Produktionsgeschwindigkeiten in der automatisierten Fertigung muss sich das Prüfverfahren für eine hundertprozentige Prüfung vollautomatisch mit der typischen Taktrate von etwa einem Hertz durchführen lassen.&#13;
In dieser Arbeit wird zuerst die prinzipielle Durchführbarkeit der thermografischen Prüfung von Punktschweißverbindungen an speziell präparierten Proben überprüft. Auf dieser Grundlage wird eine Serienuntersuchung an 75 Proben, die sich auf drei Gruppen von Schweißparametern aufteilen und neben optimal geschweißten Proben typische Fehlerbilder repräsentieren, eine Serienuntersuchung gezeigt. Hierzu wird eine Blitzlichtanregung in Transmissionsanordnung verwendet.&#13;
Es kann gezeigt werden, dass sich mit einer geeigneten Datenaufbereitung die einzelnen Gruppen sicher trennen lassen. Durch eine statistische Bewertung der Ergebnisse kann unter Verwendung eines angepassten Gütekriteriums die Trennschärfe noch deutlich erhöht werden.</abstract>
    <parentTitle language="deu">DGZfP-Jahrestagung 2011</parentTitle>
    <identifier type="old">27687</identifier>
    <identifier type="isbn">978-3-940283-33-7</identifier>
    <identifier type="urn">urn:nbn:de:kobv:b43-249915</identifier>
    <enrichment key="eventName">DGZfP-Jahrestagung 2011</enrichment>
    <enrichment key="eventPlace">Bremen, Germany</enrichment>
    <enrichment key="eventStart">30.05.2011</enrichment>
    <enrichment key="eventEnd">01.06.2011</enrichment>
    <licence>Creative Commons - CC BY-ND - Namensnennung - Keine Bearbeitungen 4.0 International</licence>
    <author>Joachim Schlichting</author>
    <author>Henrik Steinfurth</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Aktive Thermografie</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Blitzlichtanregung</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Punktschweißverbindung</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Transmissionsmessung</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei für die Öffentlichkeit verfügbar ("Open Access")</collection>
    <collection role="unnumberedseries" number="">Wissenschaftliche Artikel der BAM</collection>
    <thesisPublisher>Bundesanstalt für Materialforschung und -prüfung (BAM)</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-bam/files/24991/di1c3.pdf</file>
  </doc>
  <doc>
    <id>25144</id>
    <completedYear/>
    <publishedYear>2011</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>245</pageFirst>
    <pageLast>252</pageLast>
    <pageNumber/>
    <edition/>
    <issue>Chapter 8</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>Czech society for nondestructive testing (Cndt)</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Numerical method of active thermography for the reconstruction of back wall geometry</title>
    <abstract language="eng">The paper presents numerical methods to detect and classify defects and inhomogeneities by means of active thermography. The objective is to determine the wall thickness of structure elements with an inaccessible back wall, for example, of pipes or Containers. As test specimens we used approximately 2 cm thick PVC samples with spatial variations in the back wall geometry. Flash lamps provided the heating. To know the thickness of the wall, we used two inversion methods and compared the results achieved. One is an iterative echo defect shape method and already tested on Steel test specimens with good reconstruction results. The second one is the Levenberg-Marquardt method, applied here to thermographic data for non-destructive testing. Since data capturing using active thermography and the presented numerical methods can easily be automated, the combination of these two procedures is a promising approach providing a broad area of application.</abstract>
    <parentTitle language="eng">6th Workshop 'NDT in progress' (Proceedings)</parentTitle>
    <identifier type="old">27845</identifier>
    <identifier type="isbn">978-80-214-4339-6</identifier>
    <enrichment key="eventName">6th Workshop 'NDT in progress'</enrichment>
    <enrichment key="eventPlace">Prague, Czech Republic</enrichment>
    <enrichment key="eventStart">10.10.2011</enrichment>
    <enrichment key="eventEnd">12.10.2011</enrichment>
    <author>Regina Richter</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <author>M. Schilling</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Impulse-thermography</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Inversion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Levenberg-Marquardt method</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Echo defect shape</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Defect shape reconstruction</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>25281</id>
    <completedYear/>
    <publishedYear>2011</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>1</pageFirst>
    <pageLast>6</pageLast>
    <pageNumber/>
    <edition/>
    <issue>DGZfP-BB 127 (P45)</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>Deutsche Gesellschaft für Zerstörungsfreie Prüfung (DGZfP)</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Numerische Verfahren für die aktive Thermografie zur Untersuchung von Rückwandgeometrien</title>
    <abstract language="deu">In diesem Beitrag werden numerische Verfahren zur Erkennung und Charakterisierung von Fehlstellen, Schichtdicken, Wanddicken und Inhomogenitäten mittels aktiver Thermografie vorgestellt. Eine uantitative Beurteilung der nicht immer zugänglichen Rückwand eines Bauteils (Minderdicken) ist durch Inversion thermografischer Messdaten möglich. Diese quantitativen Informationen können durch iterative Methoden vom Gauß-Newton-Typ (Inversion) gewonnen werden. Als reale Prüfobjekte werden ca. 2 cm dicke PVC-Platten mit örtlich variierender Rückwandgeometrie untersucht. Die Erwärmung erfolgt mit&#13;
Blitzlampen, welche die PVC-Platte kurzzeitig um mehrere K erwärmt. Ein wichtiger Teil der Inversion ist die Simulation des Experiments, welche mit Finite-Elemente-Methoden (FEM) in 2D realisiert wird. Da Inversion und active Thermografie automatisierbar sind, bietet die Kombination breite Anwendungsgebiete innerhalb der Industrie.</abstract>
    <parentTitle language="deu">DGZfP-Jahrestagung 2011</parentTitle>
    <identifier type="old">27989</identifier>
    <identifier type="isbn">978-3-940283-33-7</identifier>
    <identifier type="urn">urn:nbn:de:kobv:b43-252812</identifier>
    <enrichment key="eventName">DGZfP-Jahrestagung 2011</enrichment>
    <enrichment key="eventPlace">Bremen, Deutschland</enrichment>
    <enrichment key="eventStart">30.05.2011</enrichment>
    <enrichment key="eventEnd">01.06.2011</enrichment>
    <licence>Creative Commons - CC BY-ND - Namensnennung - Keine Bearbeitungen 4.0 International</licence>
    <author>Regina Richter</author>
    <author>Marc Kreutzbruck</author>
    <author>Christiane Maierhofer</author>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Inversion</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Aktive thermografie</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Wanddicke</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Rückwand</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Minderdicken</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Schichtdicken</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei für die Öffentlichkeit verfügbar ("Open Access")</collection>
    <collection role="unnumberedseries" number="">Wissenschaftliche Artikel der BAM</collection>
    <thesisPublisher>Bundesanstalt für Materialforschung und -prüfung (BAM)</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-bam/files/25281/p45.pdf</file>
  </doc>
  <doc>
    <id>26446</id>
    <completedYear/>
    <publishedYear>2012</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>9</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Numerical method of active thermography for the reconstruction of back wall geometry</title>
    <parentTitle language="eng">QIRT 2012 - 11th International conference on Quantitative InfraRed Thermography (Proceedings)</parentTitle>
    <identifier type="old">29213</identifier>
    <enrichment key="eventName">QIRT 11 - 11th International conference on Quantitative InfraRed Thermography</enrichment>
    <enrichment key="eventPlace">Prague, Czech Repubilc</enrichment>
    <enrichment key="eventStart">11.06.2012</enrichment>
    <enrichment key="eventEnd">14.06.2012</enrichment>
    <author>Regina Richter</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Rekonstruktion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Inverse Probleme</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Defekte</value>
    </subject>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>28895</id>
    <completedYear/>
    <publishedYear>2013</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>189</pageFirst>
    <pageLast>197</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>54</volume>
    <type>article</type>
    <publisherName>Butterworth-Heinemann</publisherName>
    <publisherPlace>Oxford</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Numerical method of active thermography for the reconstruction of back wall geometry</title>
    <abstract language="eng">The paper presents a numerical method to detect and characterise defects and inhomogeneities by means of active thermography. The objective was to determine the wall thickness of structure elements with an inaccessible back wall, e.g., elements of pipes or containers. As test specimens we used PVC samples with the thickness of about 2 cm that had spatial variations in the back wall geometry. Flash lamps provided the heating. To measure the thickness of the wall, we employed the LevenbergMarquardt method, which we applied here to experimental thermographic data for non-destructive testing. We started the inversion procedure by making a rough first estimation of the back wall geometry following the echo defect shape method, and then we calculated the thickness of the back wall. We found reasonable reconstruction results which differed from the real value significantly below 1 mm at the defect centre, whereas the error wais increased at the edge of the defect, depending on its shape and depth.</abstract>
    <parentTitle language="eng">NDT &amp; E international</parentTitle>
    <identifier type="old">31784</identifier>
    <identifier type="doi">10.1016/j.ndteint.2012.10.010</identifier>
    <identifier type="issn">0963-8695</identifier>
    <enrichment key="date_peer_review">08.08.2013</enrichment>
    <author>Regina Richter</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Pulse thermography</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Wall thickness</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Inverse problems</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Reconstruction</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Defects</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Rekonstruktion</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Inverse Probleme</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Defekte</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>27575</id>
    <completedYear/>
    <publishedYear>2012</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>103</pageFirst>
    <pageLast>111</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>52</volume>
    <type>article</type>
    <publisherName>Butterworth-Heinemann</publisherName>
    <publisherPlace>Oxford</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Non-destructive testing of Cu solder connections using active thermography</title>
    <abstract language="eng">Impulse and lock-in thermography have been applied to detect delaminations of prototype solder joints, similar to those to be produced between Cu shunts and Cu busbar stabilisers at the Large Hadron Collider (LHC) at CERN. Two infrared cameras with different detector materials and with different spectral ranges and two excitation techniques have been tested and compared for their ability to detect delaminations behind 2 and 3 mm thick Cu shunts. We have analyzed the signal to noise ratio (SNR) for each detected defect and are able to detect defects down to a nominal edge length of 4 mm behind 2 mm thick Cu shunts by using fast impulse thermography and a camera with a microbolometer array. For the 3 mm thick Cu shunt, on the other hand, the nominal 4 mm defect is only visible in the lock-in thermography phase images and the highest SNR has been achieved with a cooled InSb-based camera. In addition, numerical simulations show the influence of the minimum detectable defect size on the shunt thickness and that the developed on-site testing technique is sufficient to find all defects that are detectable theoretically.</abstract>
    <parentTitle language="eng">NDT &amp; E international</parentTitle>
    <identifier type="old">30402</identifier>
    <identifier type="doi">10.1016/j.ndteint.2012.07.010</identifier>
    <identifier type="issn">0963-8695</identifier>
    <enrichment key="bibliotheksstandort">Sonderstandort: Publica-Schrank</enrichment>
    <enrichment key="date_peer_review">17.01.2013</enrichment>
    <author>Christiane Maierhofer</author>
    <author>Mathias Röllig</author>
    <author>Henrik Steinfurth</author>
    <author>Mathias Ziegler</author>
    <author>Marc Kreutzbruck</author>
    <author>C. Scheuerlein</author>
    <author>S. Heck</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Active thermography</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Solder joint</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Copper</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>FFT</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Signal-to-noise-ratio</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")</collection>
  </doc>
  <doc>
    <id>24873</id>
    <completedYear/>
    <publishedYear>2012</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>133</pageFirst>
    <pageLast>140</pageLast>
    <pageNumber/>
    <edition/>
    <issue>1</issue>
    <volume>45</volume>
    <type>article</type>
    <publisherName>Butterworth-Heinemann</publisherName>
    <publisherPlace>Oxford</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Crack sizing by laser excited thermography</title>
    <abstract language="eng">Active thermography is a nowadays widely used NDT method making use of thermal material properties for defect detection. Basically, the sample is heated and the resulting surface temperature is recorded by an IR camera. For laser thermography a laser is used to heat the sample locally. The resulting spherical heat flow allows the detection of voids in arbitrary orientation. In this work, a method is presented which is suitable for the quantitative characterization of depth and angle of surface cracks. The main idea is to evaluate the crack-caused asymmetries of the laser's thermal footprint. The heat is introduced at fixed reference positions relative to the crack. In this paper a data analysis procedure is presented which allows the crack depth and angle to be described by only two characteristic scalar parameters. By investigating artificial test specimens with spark eroded notches, the feasibility of this method is validated. Furthermore, the behavior of the characteristic parameters with variations of crack angle, depth and experimental conditions is studied systematically by FEM simulations, showing that these parameters are well behaved.</abstract>
    <parentTitle language="eng">NDT &amp; E international</parentTitle>
    <identifier type="old">27562</identifier>
    <identifier type="doi">10.1016/j.ndteint.2011.09.014</identifier>
    <identifier type="issn">0963-8695</identifier>
    <enrichment key="date_peer_review">28.11.2011</enrichment>
    <author>Joachim Schlichting</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Thermography</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Laser excitation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>FEM modeling</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Crack sizing</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>26276</id>
    <completedYear/>
    <publishedYear>2012</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>23</pageFirst>
    <pageLast>29</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>48</volume>
    <type>article</type>
    <publisherName>Butterworth-Heinemann</publisherName>
    <publisherPlace>Oxford</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Thermographic testing of spot welds</title>
    <abstract language="eng">Spot welding is one of the most important technologies for joining sheet metal. While there are lot of approaches to non-destructive testing, quality assurance still mainly relies on welding parameter monitoring and destructive testing, leading to significant failure rates. In this paper an approach to spot weld testing using flash thermography is presented. The main focus of attention is on the identification of two typical error classes: stick welds and welds at the splash limit. Besides investigating the principal feasibility of thermography for zinc plated samples the results of a series test of spot welds joining 1 mm thick TRIP steel are shown. Based upon these results a statistical criterion is developed which allows a reliable classification of the named error classes.</abstract>
    <parentTitle language="eng">NDT &amp; E international</parentTitle>
    <identifier type="old">29028</identifier>
    <identifier type="doi">10.1016/j.ndteint.2012.02.003</identifier>
    <identifier type="issn">0963-8695</identifier>
    <enrichment key="date_peer_review">09.08.2012</enrichment>
    <author>Joachim Schlichting</author>
    <author>Stephan Brauser</author>
    <author>Lutz-Alexander Pepke</author>
    <author>Christiane Maierhofer</author>
    <author>Michael Rethmeier</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Thermography</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Spot welding</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Automotive industry</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>27694</id>
    <completedYear/>
    <publishedYear>2012</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>Poster 33, 1</pageFirst>
    <pageLast>8</pageLast>
    <pageNumber/>
    <edition/>
    <issue>DGZfP-BB 136</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation>Deutsche Gesellschaft für Zerstörungsfreie Prüfung e.V. (DGZfP)</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Untersuchungen zur 2D- und 3D-Rekonstruktion von Rückwandgeometrien in der Impuls-Thermografie</title>
    <abstract language="deu">Die aktive Thermografie kommt zunehmend in der zerstörungsfreien Prüfung zum Einsatz. Hierin steckt allerdings der Bereich der Defektklassifizierung und die quantitative Defektcharakterisierung noch in den Kinderschuhen. In diesem Beitrag werden die Möglichkeiten untersucht anhand einer inversen Rekonstruktion von thermografischen Daten die Rückwandgeometrien in 2D und 3D zu ermitteln. Die Datensätze wurden bei der Prüfung von 2 cm dicken PVC-Platten mit rückseitiger Nutfräsung und mit Flachbodenbohrungen von unterschiedlichen Restwandstärken und Durchmessern gewonnen. Die thermische Anregung erfolgt mit Blitzlampen, die zeit- und ortsaufgelöste Erfassung der Oberflächentemperatur mit einer Infrarotkamera. Sowohl die thermische Anregung als auch die Temperaturmessung werden von der defektfreien Vorderseite aus durchgeführt. Die Unregelmäßigkeiten in der Abkühlung weisen auf unterschiedliche Materialdicken hin, die unter Verwendung eines iterativen Vergleiches mit simulierten Daten an die realen Wandstärken angenähert werden. Mittels simulierter Daten, die in 2D bzw. 3D durch eine Finite-Elemente-Methode berechnet werden, rekonstruieren wir die Geometrie des Probekörpers in 2D bzw. 3D mit einer optimierten und zuverlässigeren Version der iterativen Echo-Defect-Shape-Methode. Diese zeiteffiziente Methode berechnet den Startwert und seine iterative Verbesserung anhand des relativen Kontrastes. Wanddicken können innerhalb der Iteration zu- und abnehmen, bei der optimierten Version aber nicht kleiner als der Startwert werden. Dies bietet eine größere Zuverlässigkeit, da die Wanddicke vor der Iteration, d.h. der Startwert, grundsätzlich unterschätzt wird. Unter der Voraussetzung geeigneter Startwerte und Abbruchkriterien kann die Restwand an minimalen Wanddicken im Mittel auf ca. 1 mm genau bestimmt werden (z. B. bei 3D Rekonstruktion der Flachbodenbohrungen). Speziell an scharfen Defektkanten verliert das Verfahren durch laterale Wärmeflüsse an Genauigkeit.</abstract>
    <parentTitle language="deu">DACH-Jahrestagung 2012 - ZfP in Forschung, Entwicklung und Anwendung (Proceedings)</parentTitle>
    <identifier type="old">30525</identifier>
    <identifier type="isbn">978-3-940283-44-3</identifier>
    <enrichment key="eventName">DACH-Jahrestagung 2012</enrichment>
    <enrichment key="eventPlace">Graz, Austria</enrichment>
    <enrichment key="eventStart">17.09.2012</enrichment>
    <enrichment key="eventEnd">19.09.2012</enrichment>
    <author>Regina Richter</author>
    <author>Marc Kreutzbruck</author>
    <author>Christiane Maierhofer</author>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Rekonstruktion</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Inverse Probleme</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Defekte</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
  </doc>
  <doc>
    <id>28870</id>
    <completedYear/>
    <publishedYear>2013</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>1</pageFirst>
    <pageLast>8</pageLast>
    <pageNumber/>
    <edition/>
    <issue>DGZfP-BB 141 (Di.2.A.4)</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>Deutsche Gesellschaft für zerstörungsfreie Prüfung e.V. (DGZfP)</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Laser-Thermografie für die schnelle Prüfung auf mikroskopische Risse in reflektierenden metallischen Oberflächen</title>
    <abstract language="deu">Thermografische ZfP-Verfahren erlauben die Erkennung einer Vielzahl von Defekten in unterschiedlichsten Werkstoffen. Neue Ansätze unter Verwendung von Lasern ermöglichen darüber hinaus die Prüfung auf Oberflächenrisse. Wir stellen die neuesten Entwicklungen dieser vielversprechenden Technik vor und zeigen warum deren Einsatz potentiell die Standardprüfverfahren Magnetpulver- bzw. Eindringprüfung für eine Reihe von Prüfproblemen beerben könnte. Hierzu stellen wir die Prüfergebnisse zu unterschiedlichen metallischen Werkstoffen, Rissgrößen und -typen in Abhängigkeit der Prüfparameter vor. Die aktuelle Grenze der Nachweisempfindlichkeit für die mittels klassischer Thermografie schwer prüfbaren hochreflektierenden Metalloberflächen liegt mit Rissbreiten und -tiefen von weni-gen Mikrometern im Bereich der fluoreszierenden Magnetpulver- und Eindringprüfung. Dabei sind weder Verbrauchsmittel noch eine Oberflächenpräparation notwendig und eine Prüfung kann berührungslos und automatisiert über Entfernungen im Meter-Bereich erfolgen.</abstract>
    <parentTitle language="deu">DGZfP-Jahrestagung 2013</parentTitle>
    <identifier type="old">31757</identifier>
    <identifier type="isbn">978-3-940283-49-8</identifier>
    <identifier type="urn">urn:nbn:de:kobv:b43-288706</identifier>
    <enrichment key="eventName">DGZfP-Jahrestagung 2013</enrichment>
    <enrichment key="eventPlace">Dresden, Germany</enrichment>
    <enrichment key="eventStart">06.05.2013</enrichment>
    <enrichment key="eventEnd">08.05.2013</enrichment>
    <licence>Creative Commons - Namensnennung - Keine Bearbeitung 3.0</licence>
    <author>Mathias Ziegler</author>
    <author>Philipp Myrach</author>
    <author>Joachim Schlichting</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Thermografie</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Laser</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Risse</value>
    </subject>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei für die Öffentlichkeit verfügbar ("Open Access")</collection>
    <collection role="unnumberedseries" number="">Wissenschaftliche Artikel der BAM</collection>
    <thesisPublisher>Bundesanstalt für Materialforschung und -prüfung (BAM)</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-bam/files/28870/di2a4.pdf</file>
  </doc>
  <doc>
    <id>31978</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst>1</pageFirst>
    <pageLast>12</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>148</volume>
    <type>conferenceobject</type>
    <publisherName>Deutsche Gesellschaft für Zerstörungsfreie Prüfung (DGZfP)</publisherName>
    <publisherPlace>Berlin</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Sensoren für Verbunddrähte aus Niob-Titan und Kupfer</title>
    <abstract language="deu">Der Large Hadron Collider (LHC) des europäischen Kernforschungszentrums CERN ist einer der weltweit größten und leistungsfähigsten Teilchenbeschleuniger. Um den Teilchenstrahl auf seiner Kreisbahn zu halten, werden mit Hilfe supraleitender Spulen sehr starke Magnetfelder erzeugt. Die hierzu benötigten hohen Ströme werden über Verbunddrähte aus Niob-Titan und Kupfer geleitet.&#13;
Die Drähte werden u.a. durch Ultraschallschweißungen miteinander verbunden. Eine mangelhafte Verbindung kann zur Erwärmung der Kontaktstelle und in Folge davon zum Zusammenbruch der Supraleitung führen. Auf Anfrage des CERN wurden an der BAM Untersuchungen zur Prüfbarkeit solcher Verbindungen bei Umgebungstemperatur durchgeführt. Es gelang, für einen Verbindungstypen einen Wirbelstromsensor für eine manuelle Prüfung zu entwickeln. Ein Prototyp des Sensors befindet sich beim CERN in der praktischen Erprobung. Das Sensorprinzip sowie Prüfergebnisse aus Labor und Praxis werden vorgestellt.</abstract>
    <parentTitle language="deu">DGZfP-Berichtsband</parentTitle>
    <identifier type="old">35036</identifier>
    <identifier type="isbn">978-3-940283-61-0</identifier>
    <identifier type="urn">urn:nbn:de:kobv:b43-319785</identifier>
    <enrichment key="eventName">DGZfP-Jahrestagung 2014</enrichment>
    <enrichment key="eventPlace">Potsdam, Germany</enrichment>
    <enrichment key="eventStart">26.05.2014</enrichment>
    <enrichment key="eventEnd">28.05.2014</enrichment>
    <licence>Creative Commons - Namensnennung - Keine Bearbeitung 3.0</licence>
    <author>Marc Kreutzbruck</author>
    <author>P. Bauer</author>
    <author>F. Caspers</author>
    <author>S. Heck</author>
    <author>F. Müller</author>
    <author>Rainer Pohl</author>
    <author>C. Scheuerlein</author>
    <author>Roland Sickert</author>
    <author>Christiane Maierhofer</author>
    <author>Daniel Brackrock</author>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Ultraschallprüfung mit Matrix-Sensoren</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Aktive Thermografie</value>
    </subject>
    <subject>
      <language>deu</language>
      <type>uncontrolled</type>
      <value>Gabelsensor</value>
    </subject>
    <collection role="ddc" number="543">Analytische Chemie</collection>
    <collection role="fulltextaccess" number="">Datei für die Öffentlichkeit verfügbar ("Open Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
    <collection role="unnumberedseries" number="">Wissenschaftliche Artikel der BAM</collection>
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    <id>26352</id>
    <completedYear/>
    <publishedYear>2012</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>7</pageLast>
    <pageNumber/>
    <edition/>
    <issue>(Paper 499)</issue>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
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    <title language="eng">Flying laser spot thermography for the fast detection of surface breaking cracks</title>
    <abstract language="eng">We report on recent developments in the detection of surface breaking cracks using flying laser spot thermography. Application of an infrared camera for mapping the thermal radiation after excitation with a diode laser equipped with an optical scanner allows us to examine a surface containing cracks in an entirely non-destructive, contactless and fast way, without even moving the camera. We developed an efficient and robust algorithm that can be applied directly to the recorded thermal sequences, and that derives a single image containing all crack signatures. For this crack detection technique, no specific synchronisation between laser and camera is required. Hence, our approach is suitable for an upgrade of existing thermographic systems. The feasibility of the proposed procedure is proven by testing an artificial test sample and a piece of rail that comprises roll contact fatigue cracks and by comparing the results with magnetic particle testing.</abstract>
    <parentTitle language="eng">18th WCNDT - World conference on nondestructive testing (Proceedings)</parentTitle>
    <identifier type="old">29111</identifier>
    <identifier type="isbn">978-0-620-52872-6</identifier>
    <enrichment key="eventName">18th WCNDT - World conference on nondestructive testing</enrichment>
    <enrichment key="eventPlace">Durban, South Africa</enrichment>
    <enrichment key="eventStart">16.04.2012</enrichment>
    <enrichment key="eventEnd">20.04.2012</enrichment>
    <author>Joachim Schlichting</author>
    <author>Mathias Ziegler</author>
    <author>Christiane Maierhofer</author>
    <author>Marc Kreutzbruck</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Thermography</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Cracks</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Laser</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Flying spot</value>
    </subject>
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    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
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