Filtern
Erscheinungsjahr
Dokumenttyp
- Posterpräsentation (46) (entfernen)
Sprache
- Englisch (30)
- Deutsch (15)
- Mehrsprachig (1)
Referierte Publikation
- nein (46)
Schlagworte
- Mobile Robot Olfaction (6)
- RFID sensors (5)
- Localization of gas sources (4)
- Structural health monitoring (4)
- Tomographic reconstruction of gas plumes (4)
- Tunable Diode Laser Absorption Spectroscopy (TDLAS) (4)
- UAV-REGAS (4)
- Gas sensing (3)
- Sensors in concrete (3)
- Bauwerksüberwachung (2)
- Drop test (2)
- Energy harvesting (2)
- Fluorescence (2)
- Gas standard generator (2)
- Hopkinson bar (2)
- Nano aerial robot (2)
- Passive RFID (2)
- Smart structures (2)
- Swarm (2)
- TDLAS (2)
- Transmission characteristics (2)
- Umweltmonitoring (2)
- Wireless sensors (2)
- 3D-Verformungsmessung (1)
- Accelerometer (1)
- Aerial robot (1)
- Air quality monitoring (1)
- Ammonia (1)
- Ammonia gas sensor (1)
- Anemometer (1)
- Diagnosis of concrete components (1)
- Digitalisation (1)
- Digitalisierung (1)
- Distributed linear sensor (1)
- Drop tests (1)
- Embedded sensor (1)
- Embedded sensors (1)
- Environmental monitoring (1)
- Estimation (1)
- Fiber bragg grating (1)
- Field conditions (1)
- Fluorescence sensors (1)
- Fluoreszenzsensoren (1)
- Frequency response (1)
- Gas detection (1)
- Gas dispersion simulation (1)
- Gas distribution mapping and gas source localization (1)
- Gas sensors (1)
- Gas storage areas (1)
- Gas tomography (1)
- H2Safety@BAM (1)
- High impact shock application (1)
- Hopkinson Bar (1)
- Hydrogen (1)
- Indoor Localization (1)
- KonSens (1)
- Koordinatenmessung (1)
- Leak detection (1)
- Long-term requirements (1)
- Magnetic field (1)
- Magnetostrictive metal coating (1)
- Membrane-based gas sensing (1)
- Membrane-based linear gas sensor (1)
- Miniaturized sensor device (1)
- Mobile Robot (1)
- Mobile sensors (1)
- Monitoring of dangerous goods (1)
- Multi sensor device (1)
- Multigassensoren (1)
- Multirotor aircraft (1)
- NDT Inspection (1)
- Permeation (1)
- Permeation method (1)
- Phototransistor (1)
- Piezoresistive accelerometer (1)
- Piezoresistive accelerometers (1)
- Plume (1)
- Prüfung (1)
- Pump control (1)
- QI Digital (1)
- RFID-Sensorsysteme (1)
- RFID Sensors systems (1)
- Remote gas sensor model (1)
- Richtlinie (1)
- Self-diagnostic fiber optical sensor (1)
- Sensor requirements (1)
- Sensorik (1)
- Setup and Validation (1)
- Soil test field (1)
- Standard gas generator (1)
- Subsurface monitoring (1)
- Temperature behavior (1)
- Temperature behavior of a piezoresistive accelerometer (1)
- Temperature characteristics (1)
- Thrust (1)
- UAV (1)
- VOC (1)
- Verschiebungsfeld (1)
- Wasserstoff (1)
- Wind (1)
- Wind vector (1)
- pH-Sensor (1)
Organisationseinheit der BAM
Completely embedded sensor systems for long-term operation offer innovative possibilities for structural health monitoring of concrete structures. Measuring of relevant parameters, e.g., temperature, humidity, or indication of corrosion can be performed with low energy sensors. This allows to implement passive RFID sensor systems without cable connection and battery, which are power supplied exclusively by the electromagnetic field from the external reader device. To evaluate characteristics and conditions of this concept, a systematical investigation of the transmission characteristics with variation of relevant parameters, as communication frequency, installation depth, type of concrete, moisture content, etc. is currently carried out in an interdisciplinary Research project at BAM. First results are presented in this paper.
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.
Remote gas sensors mounted on mobile robots enable the mapping of gas distributions in large or hardly accessible areas. A challenging task, however, is the generation of threedimensional distribution maps from these gas measurements.
Suitable reconstruction algorithms can be adapted, for instance, from the field of computed tomography (CT), but both their performance and strategies for selecting optimal measuring poses must be evaluated. For this purpose simulations are used, since, in contrast to field tests, they allow repeatable conditions. Although several simulation tools exist, they lack realistic models of remote gas sensors. Recently, we introduced a model for a Tunable Diode Laser Absorption Spectroscopy (TDLAS) gas sensor taking into account the conical shape of its laser beam. However, the novel model has not yet been validated with experiments. In this paper, we compare our model with a real sensor device and show that the assumptions made hold.
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.
Fluorescence based sensing is a versatile approach for the trace analysis outside of the laboratory, requiring suitable sensor materials and their integration into sensing devices. The versatility of fluorophores as probes, especially in terms of the possibility to tailor their optical as well as their recognition properties by synthetic modifications in a wide range, renders them a superior active component for the preparation of optical sensor devices. Recent works at BAM in this field include, for example, the detection of nerve gas agents, illustrating impressively the aforementioned benefits of fluorophores in optical sensing applications.
In the interdisciplinary approach presented here, we target hazardous gases such as ammonia, benzene, and hydrogen sulfide, next to others, which pose a major threat to human health and environmental safety and for which the availability of a sensitive and reliable detection method is highly desirable.
The dyes presented follow a “turn-on” fluorescence schematic which allows for the selective and sensitive detection of the respective gaseous analyte. The immobilization of the probe in polymeric matrices is then the next step toward the fabrication of a prototype device for molecular sensing.