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Erscheinungsjahr
- 2018 (22) (entfernen)
Dokumenttyp
- Posterpräsentation (10)
- Beitrag zu einem Tagungsband (7)
- Vortrag (3)
- Zeitschriftenartikel (1)
- Forschungsbericht (1)
Schlagworte
- Environmental monitoring (4)
- Mobile Robot Olfaction (4)
- Drop test (3)
- Tomographic reconstruction of gas plumes (3)
- UAV-REGAS (3)
- Gas sensing (2)
- High impact shock application (2)
- Hopkinson bar (2)
- Localization of gas sources (2)
- Magnetostriktive Beschichtung (2)
- Mobile robot olfaction (2)
- Nano aerial robot (2)
- Piezoresistive accelerometer (2)
- Swarm (2)
- Temperature characteristics (2)
- Tunable Diode Laser Absorption Spectroscopy (TDLAS) (2)
- Accelerometer (1)
- Aerial robot (1)
- Ammonia (1)
- Analysis (1)
- Bauteilmonitoring (1)
- Bauwerksüberwachung (1)
- Concrete (1)
- Drop (1)
- Eindringmodul (1)
- Embedded system (1)
- Estimation (1)
- Faser-Bragg Gitter (1)
- Faser-Bragg-Gitter (FBG) (1)
- Fluorescence sensor (1)
- Fluorescent sensor (1)
- Flying platforms (1)
- Frequency response (1)
- Gas sensors (1)
- Gas standard generator (1)
- Hopkinson Bar (1)
- Härtevergleichsplatten (1)
- Instrumentierte Eindringprüfung (1)
- Kraftabhängige Funktion (1)
- Magneto-optischer Sensor (1)
- Maschinennachgiebigkeit (1)
- Measurement (1)
- Multigassensoren (1)
- Multirotor aircraft (1)
- Oil (1)
- Passive sensor interface (1)
- Permeation (1)
- Prototyp (1)
- Prüfung (1)
- RFID (1)
- Remote gas sensing (1)
- Richtlinie (1)
- Selbstkalibrierung (1)
- Sensorvalidierung (1)
- Sphärische Indenter (1)
- Structural Health Monitoring (1)
- Structural Health Monitoring (SHM) (1)
- Temperature behavior (1)
- Test (1)
- Test gas generation (1)
- Tunable diode laser absorption Spectroscopy (TDLAS) (1)
- UAS (1)
- UAV (1)
- Umweltmonitoring (1)
- Vereinfachtes Verfahren (1)
- Water quality (1)
- Wind vector (1)
- Wireless mobile sensor device (1)
Organisationseinheit der BAM
- 8 Zerstörungsfreie Prüfung (22)
- 8.1 Sensorik, mess- und prüftechnische Verfahren (22)
- 1 Analytische Chemie; Referenzmaterialien (2)
- 1.9 Chemische und optische Sensorik (2)
- 2 Prozess- und Anlagensicherheit (2)
- 2.1 Sicherheit von Energieträgern (2)
- 6 Materialchemie (2)
- 6.7 Materialsynthese und Design (2)
- 8.6 Faseroptische Sensorik (2)
- 3 Gefahrgutumschließungen; Energiespeicher (1)
- 3.3 Sicherheit von Transportbehältern (1)
- 8.2 Zerstörungsfreie Prüfmethoden für das Bauwesen (1)
- VP Vizepräsident (1)
- VP.2 Informationstechnik (1)
Eingeladener Vortrag
- nein (3)
Wyciek metanu (CH4) z infrastruktury takiej jak rurociągi czy zbiorniki magazynowe ma kluczowe znaczenie dla środowiska oraz stwarza zagrożenie dla bezpieczeństwa ludzi i mienia. Obecnie, po okresie bezawaryjnej eksploatacji, można zaobserwować wzrost liczby incydentów spowodowanych nieszczelnościami rurociągów przesyłowych.
W Polsce szczególnie problematyczne okazują się gazociągi, które powstały dekady temu. W tamtym czasie normy techniczne i przepisy budowlane były łagodniejsze niż obecnie obowiązujące. Integralność tych gazociągów jest trudna do skontrolowania, gdyż na etapie budowy nie zostały one przystosowane do badania tłokami pomiarowymi. Aby sprostać temu wyzwaniu, UDT poszukuje metod umożliwiających szybkie i niezawodne wykrywanie oraz lokalizowanie nieszczelności gazociągów na duże odległości.
This paper describes a wireless mobile prototype able to perform optical measurements by means of a miniatur-ized spectrometer for low light analysis, e.g. fluorescent sensors. Evaluations, calculations, calibration management and result display are performed by a computer or a standard tablet. The device was designed primarily to detect traces of oil in drinking or ground water and for the analyses of crude oils. However, it can also address a wide range of fluorescent sensors. The fast and user-friendly inspection of water quality or oil properties, as well as the adaptability and mobility, make the device attractive for a variety of users. Further application areas could be easily imple-mented by adapting the optics and the software (database, data processing and calibration plots, etc.)
Small unmanned aircraft (UA) are used increasingly as flying sensor platforms. Amongst other things they are used for environmental monitoring, for example gas distribution mapping. Sometimes, these applications require knowledge of the ambient wind field, which can be measured by additional devices like anemometers. In general, it would be interesting to avoid such additional apparatuses. One way to achieve this is to estimate the wind vector, that is both the wind direction and speed, from the state variables of the UA.
Der Beitrag präsentiert die erarbeiteten technischen Richtlinien zur Anwendung und Prüfung von Multigassensoren innerhalb der Richtlinienreihe VDI/VDE 3518 sowie in diesem Zusammenhang die Möglichkeiten der Sensorprüfung im akkreditierten Prüflabor des Fachbereichs 8.1 der BAM. Im Speziellen wird das in Kürze veröffentlichte Blatt 3 der Richtlinienreihe vorgestellt, das Bezug auf Multigassensoren für geruchsbezogene Messungen mit elektronischen Nasen nimmt.
Emissions of ammonia into the environment are mainly caused by agriculture, but also by combustion processes in waste and by road traffic. Even at low concentrations, this substance is not only an odour nuisance, but also a substance with ecological and climatic relevance. Therefore, BAM tested commercial electrochemical, and metal oxide based sensors, which have limited suitability for measuring in the environmental molar fraction range. Alternatively, own developments for the detection of ammonia in the trace range were implemented, wherein the analyte is measured by changing the fluorescence of a BODIPY dye at 550 nm by means of a portable fluorescence sensor directly from the gas phase. For the calibration of ammonia sensors and measuring instruments, a stationary system based on the mixture of certified test gases from pressure cylinders with calibrated mass flow controllers is available. A test gas generator was developed for on-site calibration and testing of sensors and measuring devices. The generation of ammonia-containing gases in the environmental relevant range of levels below 1000 nmol/mol is carried out by the permeation method according to ISO 6145-10. For the traceability of ammonia, standards are provided and further developed by the National Metrological Institutes and designated institutes. Metrological standards are based on SI units and are a basis for traceability of sensors or gas analysers.
Leaking methane from infrastructures, such as pipelines and landfills, is critical for the environment but can also pose a safety risk. To enable a fast detection and localization of these kind of leaks, BAM developed a novel robotic platform for aerial remote gas sensing. Spectroscopic measurement methods for remote sensing of selected gases lend themselves for use on mini-copters, which offer a number of advantages for inspection and surveillance over traditional methods. No direct contact with the target gas is needed and thus the influence of the copter downwash on the measured gas plume can be kept to a minimum. This allows to overcome one of the major issues with gas-sensitive mini-copters. On the other hand, remote gas sensors, most prominently Tunable Diode Laser Absorption Spectroscopy (TDLAS) sensors have been too bulky given the payload and energy restrictions of mini-copters. Here, we present the Unmanned Aerial Vehicle for Remote Gas Sensing (UAV-REGAS), which combines a novel lightweight TDLAS sensor with a 3-axis aerial stabilization gimbal for aiming on a versatile multicopter. The proposed system can be deployed in scenarios that cannot be addressed by currently available systems and thus constitutes a significant step forward for the field of Mobile Robot Olfaction (MRO). It enables tomographic reconstruction of gas plumes and a localization of gas sources. We also present first results showing its performance under realistic conditions.
Temperature characteristics of a piezoresistive accelerometer for high impact shock application
(2018)
This study presents the characterization of a piezoresistive accelerometer damped with silicon oil for the application in drop tests carried out at BAM. Experiments were performed with the Hopkinson Bar method in close correlation to the real-world application conditions. The results point out certain limitations regarding the temperature influence and the frequency response. Additional experiments were performed with a gas damped type of piezoresistive accelerometer, which has superior specifications, particularly for low temperatures. The results allow for a comparison.
Temperature characteristics of a piezoresistive accelerometer for high impact shock application
(2018)
This study presents the characterization of a piezoresistive accelerometer damped with silicon oil for the application in drop tests carried out at BAM. Experiments were performed with the Hopkinson Bar method in close correlation to the real-world application conditions. The results point out certain limitations regarding the temperature influence and the frequency response. Additional experiments were performed with a gas damped type of piezoresistive accelerometer, which has superior specifications, particularly for low temperatures. The results allow for a comparison.
Sensor network deployment
(2018)
Structural Health Monitoring (SHM) has become very important in today's rapidly developing time. High buildings, large bridges and complex technical structures need to be monitored continuously and this over long periods.
Visual monitoring cannot evaluate the internal condition of building structures. Thus, material embedded sensors are needed. Cable connection of these sensors pose the disadvantage of weak spots and water intrusion. For concrete embedded sensors the use of batteries is not convenient, because of limited lifetime, difficult charging, and generation of electrical waste.. Hence, monitoring should be implemented preferentially with firmly embedded passive RFID sensor modules. However, since the concrete structure forms an electromagnetically reflective and absorbing barrier, only limited energy can be transmitted to the module. This project requires a highly energy-saving system, which can record different sensor parameters at critical points.