Analytische Chemie
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- Nano aerial robot (6)
- RFID sensors (4)
- Structural health monitoring (4)
- Swarm (4)
- Electronic nose (3)
- Wireless sensors (3)
- Air quality (2)
- Air quality monitoring (2)
- Embedded sensor (2)
- Embedded sensors (2)
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- Gas sensing (2)
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- Long term monitoring (2)
- Magnetic field (2)
- Mobile Robot Olfaction (2)
- Multisensor system (2)
- Smart structures (2)
- Spectroscopy (2)
- Trail detection (2)
- Trail following (2)
- Transmission characteristics (2)
- VOC (2)
- Accelerometer (1)
- Actuators (1)
- Aerial robot olfaction (1)
- Ammonia gas sensor (1)
- Autonomous micro UAV (1)
- Biologically inspired robots (1)
- Calibration of electrical quantities (1)
- Calibration of force (1)
- Calibration of temperature (1)
- Chemometric techniques (1)
- Concrete (1)
- Distributed linear sensor (1)
- Drop test (1)
- DuraBASt (1)
- Embedded (1)
- Embedded system (1)
- Emmbedded sensor (1)
- Environmental analysis (1)
- Fiber Bragg grating (1)
- Fiber Bragg gratings (1)
- Fiber bragg grating (1)
- Field conditions (1)
- Finite element methods (1)
- Fluorescence (1)
- Fluorescent sensor (1)
- GC-MS (1)
- Gas detection (1)
- Gas detector (1)
- Gas dispersion simulation (1)
- Gas distribution mapping and gas source localization (1)
- Gas source localization (1)
- Gas storage areas (1)
- Humidity sensors (1)
- Indoor Localization (1)
- Leak detection (1)
- Magnetostriction (1)
- Magnetostrictive metal coating (1)
- Measurement uncertainty (1)
- Membrane-based gas sensing (1)
- Membrane-based linear gas sensor (1)
- Metal oxide semiconductor (1)
- Miniaturized sensor device (1)
- Mobile Robot (1)
- Mobile robot olfaction (1)
- Modeling and simulation (1)
- Moisture (1)
- Moisture measurements (1)
- Monitoring (1)
- Multi sensor device (1)
- NDT Inspection (1)
- New sensor principles (1)
- Oil (1)
- Passive RFID (1)
- Passive sensors (1)
- Pattern recognition methods (1)
- Pump control (1)
- RFID based sensors (1)
- RFID-based sensors (1)
- Reactive plume tracking (1)
- Remote gas sensor model (1)
- SHM (1)
- Self-diagnostic fiber optical sensor (1)
- Sensors (1)
- Sensors in concrete (1)
- Setup and Validation (1)
- Smart sensors (1)
- Soil test field (1)
- Standard gas generator (1)
- Strain (1)
- Structure health monitoring (1)
- Subsurface monitoring (1)
- TDLAS (1)
- Temperature behavior (1)
- Urban air monitoring (1)
- Water quality (1)
- WiFi (1)
- Wireless mobile sensor device (1)
- agricultural economy (1)
- embedded sensor (1)
- environment (1)
- fluorescence (1)
- gas analysis (1)
- poultry odorous air monitoring (1)
- spectroscopy (1)
Organisationseinheit der BAM
- 8 Zerstörungsfreie Prüfung (19)
- 8.1 Sensorik, mess- und prüftechnische Verfahren (19)
- 1 Analytische Chemie; Referenzmaterialien (4)
- 1.9 Chemische und optische Sensorik (4)
- 8.2 Zerstörungsfreie Prüfmethoden für das Bauwesen (2)
- 8.0 Abteilungsleitung und andere (1)
- VP Vizepräsident (1)
- VP.2 Informationstechnik (1)
One of the more difficult tasks for structural health monitoring is the continuous evaluation of the stability and load capacity of the building materials. This knowledge can be won, e.g., by taking material samples at the examining place with the drawback of partly destroying the structure. To avoid this, modern sensor and communication technologies offer promising methods for non-destructive testing. To address the tasks for monitoring of concrete structures, in the presented study, different sensors were combined with RFID transponders and embedded in concrete components.
Long-term completely embedded sensor systems 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.
To quantify the moisture in concrete, RFID based humidity sensors are embedded. Passive high frequency, ultra-high frequency RFID tags as well as active Bluetooth sensors are tested. After concreting, all sensors measure the corresponding relative humidity to monitor the concrete moisture. Two case studies are performed, embedding in an existing construction, i.e. the duraBASt test bridge, and embedding in cement based mortar in the laboratory. As basis for robust and long-life sensors in alkaline concrete, different casing materials are tested. Furthermore, signal strength measurements and their sensitivity to different moisture levels are performed.
Insect behavior is a common source of inspiration for roboticists and computer scientists when designing gas-sensitive mobile robots. More specifically, tracking airborne odor plumes, and localization of distant gas sources are abilities that suit practical applications such as leak localization and emission monitoring. Gas sensing with mobile robots has been mostly addressed with ground-based platforms and under simplified conditions and thus, there exist a significant gap between the outstanding insect abilities and state-of-the-art robotics systems. As a step toward practical applications, we evaluated the performance of three biologically inspired plume tracking algorithms. The evaluation is carried out not only with computer simulations, but also with real-world experiments in which, a quadrocopter-based micro Unmanned Aerial Vehicle autonomously follows a methane trail toward the emitting source. Compared to ground robots, micro UAVs bring several advantages such as their superior steering capabilities and fewer mobility restrictions in complex terrains. The experimental evaluation shows that, under certain environmental conditions, insect like behavior in gas-sensitive UAVs is feasible in real-world environments.