TY - CONF A1 - Köppe, Enrico A1 - Bartholmai, Matthias A1 - Prager, Jens T1 - Device concept for the generation of guided waves for early damage detection N2 - In this study a method for early damage detection is investigated based on the directed excitation and measuring of Lamb waves (guided waves). The objective is to make a statement about the practicability of a Lamb wave generator (LWG) and about the application relevant parameters (specimen materials and dimensions, wave characteristics, excitation, transmission und reflection). Guided waves enable an effective differentiation of structural and defective indications as well as a classification of different defect types. For the investigations, a LWG was developed which combines the advantages of the single excitation of a piezoelectric actuator and the possibility of a group excitation. Algorithms were developed to identify and analyze damage patterns (cracks, wholes, weakening). T2 - Eurosensors XXVI CY - Kraków, Poland DA - 09.09.2012 KW - Lamb wave KW - Guided wave KW - DDS KW - SHM KW - Early damage detection PY - 2012 DO - https://doi.org/10.1016/j.proeng.2012.09.363 SN - 1877-7058 VL - 47 SP - 1185 EP - 1188 PB - Elsevier AN - OPUS4-27552 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Köppe, Enrico A1 - Bartholmai, Matthias A1 - Liers, A. A1 - Schiller, J. T1 - Radio-based multi-sensor system for person tracking and indoor positioning N2 - Sensor based person tracking is a challenging topic. The main objective is positioning in areas without GPS connection, i.e. indoors. A research project is carried out at BAM, Federal Institute for Materials Research and Testing, to develop and to validate a multi-sensor system for 3D localization. It combines body motion sensing and a guard system for the tracking and recording of the status of persons. The so named BodyGuard system was designed for sensor-based monitoring and radio-based transmission of the movement of a person. Algorithms were developed to transform the sensor data into a spatial coordinate. Thispaper describes how the BodyGuard system operates, which main components were used in the system, how the individual sensor data are converted into 3D motion data, with which algorithms the individual sensors are processed, how individual errors are compensated and how the sensor data are merged into a 3D Model. Final objective of the BodyGuard system is to determine the exact location of a person in a building, e.g. during fire-fighting operations. T2 - WPNC '12 - 9th Workshop on positioning, navigation and communication 2012 CY - Dresden, Germany DA - 15.03.2012 KW - Wireless sensor network (WSN) KW - Embedded systems KW - Sensor calibration and validation KW - Person tracking KW - Inertial navigation system KW - Inertial measurement unit PY - 2012 IS - PS 11 SP - 1 EP - 7 CY - Dresden AN - OPUS4-26028 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hohendorf, Stefan A1 - Bartholmai, Matthias T1 - Intelligente Gefahrgutbehälter - IBC mit Gedächtnis N2 - Trotz strenger gesetzlicher Regelungen kommt es immer wieder zu schwerwiegenden Unfällen und Mängeln beim Transport und der Lagerung von Gefahrgütern. Die Ursachen dafür sind oft technisches, aber auch menschliches Versagen. Nicht zu unterschätzen ist die ständig wachsende Anzahl von Gefahrguttransporten auf deutschen Straßen. Waren 2002 noch 126 Mio. t Fracht mit Gefahrguttransporten im Straßenverkehr unterwegs, stieg die Frachtmenge im Jahr 2008 bereits auf 171 Mio. t. In den letzen Jahren ereigneten sich nach Angaben des statistischen Bundesamtes etwa 300 schwere Unfälle, an denen Gefahrguttransporte beteiligt waren. Allein 2009 wurden 1 372 Unfälle mit wassergefährdenden Stoffen registriert, wobei insgesamt 376 000 l wassergefährdende Stoffe freigesetzt wurden. KW - Gefahrgut KW - RFID KW - BAM Datenbank Gefahrgut KW - Monitoring KW - Ladungsssicherung PY - 2012 UR - http://www.technischesicherheit.de/ts/currentarticle.php?data[article_id]=67080 SN - 2191-0073 VL - 2 IS - 5 SP - 2 EP - 4 PB - Springer-VDI-Verl. CY - Düsseldorf AN - OPUS4-25904 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -