Filtern
Erscheinungsjahr
Dokumenttyp
- Beitrag zu einem Tagungsband (80) (entfernen)
Sprache
- Englisch (72)
- Deutsch (7)
- Mehrsprachig (1)
Schlagworte
- Structural health monitoring (8)
- Nano aerial robot (6)
- Gas source localization (5)
- Gas storage areas (5)
- Membrane-based gas sensing (5)
- RFID sensors (5)
- Subsurface monitoring (5)
- Drop test (4)
- Gas sensors (4)
- Monitoring (4)
- Swarm (4)
- Air quality monitoring (3)
- Autonomous micro UAV (3)
- Electronic nose (3)
- Embedded sensors (3)
- Hazardous scenarios (3)
- LoRaWAN (3)
- Mobile Robot Olfaction (3)
- Multisensor system (3)
- SHM (3)
- Smart sensors (3)
- Smart structures (3)
- VOC (3)
- Wireless sensors (3)
- Air quality (2)
- Biologically inspired robots (2)
- Chemical sensing (2)
- Concrete (2)
- Condition monitoring (2)
- Dangerous goods (2)
- Data-fusion (2)
- Distributed linear sensor (2)
- Early-damage-detection (2)
- Embedded sensor (2)
- Embedded systems (2)
- Energy harvesting (2)
- Environment (2)
- Fiber optical sensing (2)
- Funksensorik (2)
- Gas sensing (2)
- Indoor air quality (2)
- Inertial measurement unit (2)
- Inertial navigation system (2)
- Lamb-waves (2)
- Localization (2)
- Long term monitoring (2)
- Magnetic field (2)
- Mikrodrohne (2)
- Mobile robot olfaction (2)
- Mobile sensing system (2)
- Multi-sensor system (2)
- Non-destructive evaluation (2)
- Passive RFID (2)
- Person tracking (2)
- Quadrocopter (2)
- RFID (2)
- RFID-based sensors (2)
- Reactive plume tracking (2)
- Safety management (2)
- Sensor calibration and validation (2)
- Sensornetzwerk (2)
- Sensors (2)
- Sensors in concrete (2)
- Spectroscopy (2)
- Strukturüberwachung (2)
- Trail detection (2)
- Trail following (2)
- Transmission characteristics (2)
- Ultrasound (2)
- Wireless sensor network (WSN) (2)
- Accelerometer (1)
- Actuators (1)
- Aerial robot olfaction (1)
- Ammonia gas sensor (1)
- Analysis (1)
- Anemotaxis (1)
- Artificial potential field (1)
- Autonomous UAV (1)
- Bauteilmonitoring (1)
- Berlin Main Station (1)
- Bio-inspired (1)
- Bridge components (1)
- Calibration of electrical quantities (1)
- Calibration of force (1)
- Calibration of temperature (1)
- Chemical and wind sensing (1)
- Chemometric techniques (1)
- Chemotaxis (1)
- Computed tomography (1)
- Cone Calorimeter (1)
- DDS (1)
- Data fusion (1)
- Dehnungsmessstreifen (1)
- Differential displacements (1)
- Digital Certificates (1)
- Digitalisation (1)
- Distributed multifunctional sensor (1)
- Distributed sensor (1)
- Drop (1)
- DuraBASt (1)
- Early damage detection (1)
- Eindringmodul (1)
- Electronic transport documents (1)
- Embedded (1)
- Embedded system (1)
- Emmbedded sensor (1)
- Environmental analysis (1)
- Faser-Bragg Gitter (1)
- Fiber Bragg grating (1)
- Fiber Bragg gratings (1)
- Fiber bragg grating (1)
- Fibre optical sensing (1)
- Field conditions (1)
- Finite element methods (1)
- Fire retardancy (1)
- Fluorescence (1)
- Fluorescent sensor (1)
- Fluoreszenzlöschung (1)
- GC-MS (1)
- Gas detection (1)
- Gas detector (1)
- Gas dispersion simulation (1)
- Gas distribution mapping and gas source localization (1)
- Gas distribution modeling (1)
- Gas distribution modelling (1)
- Gas storage sites (1)
- Gasfreisetzung (1)
- Gefährdungsbeurteilung (1)
- Guided wave (1)
- High impact shock application (1)
- Hochdynamische Untersuchungen (1)
- Hopkinson bar (1)
- Hopkinson pressure bar (1)
- Hopkinson-Stab (1)
- Humidity sensors (1)
- Hydraulic levelling system (1)
- Hydrogen technology (1)
- Härtevergleichsplatten (1)
- Impact (1)
- Indoor Localization (1)
- Instrumentierte Eindringprüfung (1)
- Intumescence (1)
- Klebstoffe (1)
- Kraftabhängige Funktion (1)
- Lamb wave (1)
- Large scale soil test field (1)
- Laser-based displacement measuring system (1)
- Leak detection (1)
- Legged robots (1)
- Linear sensor (1)
- Localization of gas sources (1)
- Magneto-optischer Sensor (1)
- Magnetostriction (1)
- Magnetostrictive metal coating (1)
- Magnetostriktive Beschichtung (1)
- Maschinennachgiebigkeit (1)
- Measurement (1)
- Measurement uncertainty (1)
- Membrane-based linear gas sensor (1)
- Metal oxide semiconductor (1)
- Methane measuring (1)
- Micro UAV (1)
- Miniaturized sensor device (1)
- Mobile Robot (1)
- Modeling and simulation (1)
- Moisture (1)
- Moisture measurements (1)
- Monitoring of CO2 (1)
- Multi sensor device (1)
- Multi-Hop WSN (1)
- Multi-sensor device (1)
- Multichannel measuring (1)
- Multihop (1)
- NDT Inspection (1)
- Nano UAV Swarm (1)
- Nanocomposites (1)
- New sensor principles (1)
- Nitroaromaten (1)
- Odor localization (1)
- Oil (1)
- Olfaction (1)
- Particle filter (1)
- Passive sensor interface (1)
- Passive sensors (1)
- Pattern recognition methods (1)
- Piezoresistive accelerometer (1)
- Plume tracking (1)
- Prototyp (1)
- Pump control (1)
- Quadrokopter (1)
- Quadruped robots (1)
- Quality Infrastructure (1)
- Quantification of gas concentrations (1)
- RAM packages (1)
- RFID Sensor systems (1)
- RFID based sensors (1)
- Radioactive (1)
- Red Phosphorus (1)
- Remote gas sensor model (1)
- Robotik (1)
- Schadensfrüherkennung (1)
- Selbstkalibrierung (1)
- Selective permeability (1)
- Self-diagnostic fiber optical sensor (1)
- Sensor (1)
- Sensor planning (1)
- Setup and Validation (1)
- Single cable system (1)
- Soil test field (1)
- Spatially distributed monitoring (1)
- Sphärische Indenter (1)
- Standard gas generator (1)
- Strain (1)
- Strain measurements (1)
- Structural Health Monitoring (1)
- Structure health monitoring (1)
- Suche und Lokalisierung von gasförmigen Gefahrstoffquellen (1)
- System adhesive/ strain gauge (1)
- TDLAS (1)
- Temperaturabhängige Prüfung (1)
- Temperature and Frequency Compensation (1)
- Temperature behavior (1)
- Temperature calibration (1)
- Temperature characteristics (1)
- Temperature dependent and high dynamic load tests (1)
- Temperaturkompensation (1)
- Test (1)
- Tomographic reconstruction of gas plumes (1)
- Tunable Diode Laser Absorption Spectroscopy (TDLAS); UAV-REGAS (1)
- UHF antenna (1)
- Urban air monitoring (1)
- Vereinfachtes Verfahren (1)
- WLAN (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 (28)
- 8.1 Sensorik, mess- und prüftechnische Verfahren (28)
- 1 Analytische Chemie; Referenzmaterialien (4)
- 1.9 Chemische und optische Sensorik (4)
- 8.2 Zerstörungsfreie Prüfmethoden für das Bauwesen (4)
- 3 Gefahrgutumschließungen; Energiespeicher (1)
- 3.3 Sicherheit von Transportbehältern (1)
- 6 Materialchemie (1)
- 6.7 Materialsynthese und Design (1)
- 8.3 Thermografische Verfahren (1)
Sensors integrated into devices and structures provide essential data to control, optimize or manage machines and structural components. In the last years, processes, applications and machine parts became more and more intelligent. Consequently, the need for sensor validation increased significantly in order to rely on sensor data and measurement results.
Structure-integrated fibre optic strain sensors, such as fiber Bragg gratings (FBG), are of special interest in the composite manufacturing industry. This type of sensor makes it possible to gain information and to collect measurement data about entire production processes and whole life-time cycles of composite-made machine parts and structures. However, validation concepts and approaches for this type of sensors are barely reported in literature. Furthermore, all the reported activities have the drawback that the sensor diagnosis strategy is implemented as limited mathematical models and/or complex time-consuming spectral analysis tools which are applied in data post-processing loops. However, to automate sensor validation and to apply real-time and in-field sensor fault detection, it is necessary to acquire measurement data and information about the measurement reliability at the same time.
In this paper, we show that a micro unmanned aerial vehicle (UAV) equipped with commercially available gas sensors can address environmental monitoring and gas source localization (GSL) tasks. To account for the challenges of gas sensing under real-world conditions, we present a probabilistic approach for GSL that is based on a particle filter (PF). Simulation and real-world experiments demonstrate the suitability of this algorithm for micro UAV platforms.
This work focuses on the design and fabrication of low-cost and fast-response of an electronic nose (E-nose) based on semiconductor gas sensors, for discriminating some synthetic gases such as ammonia (NH3), ethanol (C2H5OH), and hydrogen sulfide (H2S). Additionally, the capability of separating different concentration levels of each considered gases was checked. Dataset treatment of E-nose by using Principal Component Analysis (PCA) showed a good discrimination of the different synthetic gases. Furthermore, perfect classification was reached of different concentration levels of the analysed gases by using Discriminant Function Analysis (DFA). In the light of these results, it could be stated that the developed E-nose system constitutes an inexpensive, rapid, simple to use, and efficient tool for synthetic gases detection.
This paper presents first advances in the area of aerial chemical trail following. For that purpose, we equipped a palm-size aerial robot, based on the Crazyflie 2.0 quadrocopter, with a small lightweight metal oxide gas sensor for measuring evaporated ethanol from chemical trails. To detect and localize the chemical trail, a novel detection criterion was developed that uses only relative changes in the transient phase of the sensor response, making it more robust in its application. We tested our setup in first crossing-trail experiments showing that our flying ant robot is able to correlate an odor hit with the chemical trail within 0.14 m. Principally, this could enable aerial chemical trail following in the future.
This paper presents a sampling strategy for mobile gas sensors. Sampling points are selected using a modified artificial potential field (APF) approach, which balances multiple criteria to direct sensor measurements towards locations of high mean concentration, high concentration variance and areas for which the uncertainty about the gas distribution model is still large. By selecting in each step the most often suggested close-by measurement location, the proposed approach introduces a locality constraint that allows planning suitable paths for mobile gas sensors. Initial results in simulation and in real-world experiments with a gas-sensitive micro-drone demonstrate the suitability of the proposed sampling strategy for gas distribution mapping and its use for gas source localization.
Es wird ein vereinfachtes Verfahren für die Bestimmung und Implementierung der Maschinennachgiebigkeit bei der Verwendung eines sphärischen Indenters dargestellt. Die Maschinennachgiebigkeit wird bei deutlicher Kraftabhängigkeit als Funktion der Kraft in die Auswertung implementiert. Als sensitiver Kennwert dient der aus der instrumentierten Eindringprüfung an Härtevergleichsplatten ermittelte Eindringmodul.
Over decades, the German Federal Institute for Materials Research and Testing (BAM) has established a sophisticated calibration laboratory for force, temperature and electrical quantities. Since more than 15 years it is accredited, currently by the national accreditation body (DAkkS), and offers its service also to external entities on a global scale. As a public provider, we are furthermore committed to research and development activities that demand measurements with highest quality and low level of uncertainties. Two R&D examples are highlighted within this contribution.
Piezoresistive accelerometers use a strain-sensing element, generally made of semiconductor material, e.g., silicon to convert the mechanical motion into an electrical signal. This element is usually designed in form of a cantilever beam loaded with a mass. Acceleration causes bending of the beam, which produces a change of electrical resistance proportional to the applied acceleration.
Main advantages of piezoresistive accelerometers in comparison to other types, e.g., piezoelectric and capacitive, is their robust and highly dynamic behavior, which qualifies them for application in high impact shock applications. Mechanical damping is typically implemented with silicon oil in a way that the output signal is undistorted over a wide frequency range. These characteristics principally qualify them for the application in drop tests carried out at BAM, for which they are calibrated over the frequency range from 1 to 4 kHz. However, using silicon oil for damping, has the drawback of temperature dependent change of its viscosity, leading to temperature dependent deviation of the accelerometer’s sensitivity.
This study presents experimental results of the temperature behavior of a piezoresistive accelerometer with a dynamic range up to ±5000 g.
This type of accelerometer is applied for drop tests which are partially performed at temperatures of -40 or +100 °C.
In this study, the ability of an electronic nose developed to analyze and monitor odor emissions from three poultry farms located in Meknes (Morocco) and Berlin (Germany) was evaluated. Indeed, the potentiality of the electronic nose (e-nose) to differentiate the concentration fractions of hydrogen sulfide, ammonia, and ethanol was investigated. Furthermore, the impact change of relative humidity values (from 15% to 67%) on the responses of the gas sensors was reported and revealed that the effect remained less than 0.6%. Furthermore, the relevant results confirmed that the developed e-nose system was able to perfectly classify and monitor the odorous air of poultry farms.