Inductive sensor

About: Inductive sensor is a research topic. Over the lifetime, 2282 publications have been published within this topic receiving 21984 citations.

Internal combustion engine e.g. Diesel engine, controlling method, involves correcting position, of crankshaft of internal combustion engine, provided by inductive sensor, based on difference between phase relations

Abstract: The method involves determining a phase relation between a preferential position of a crankshaft (1) of an internal combustion engine (100) and a signal characterizing evolution of combustion. A phase relation between a signal position of an inductive sensor (120) providing the preferential position and signal is determined. A position of the crankshaft, provided by the sensor is corrected based on difference between the relations.

IR-Sensography: expanding the scope of contact-free sensing methods

Abstract: Capturing the response of one or more sensor materials is conventionally performed by the direct transformation of a chemical or physico-chemical signal into an electrical one. With an increasing number of sensor materials within an arrangement of sensor elements or a sensor array, problems such as contacting each single sensor, signal processing and resistance against cross-talk, harsh conditions such as corrosive atmospheres, etc are limiting factors for the further development of so-called 'chemical noses'. State-of-the-art and commercially available are arrays of eight different sensor materials, literature known in another context are sensor arrays with 256 materials on a silicon wafer, which are contacted via electrical conduits. We present here the concept of the IR-Sensography?, the use of an IR-camera as an external detector system for sensor libraries. Acting like an optical detection method, the IR-camera detects small temperature changes due to physisorption, chemisorption or other forms of interaction or reaction as an output signal in the form of radiation emitted by the multiplicity of sensor materials simultaneously. The temperature resolution of commercially available IR-camera systems can be tuned to the range below 0.1 K. Due to the separation of sensors and the detector device, reaction conditions at the sensor locus can be adapted to the analytical problem and do not need to take care of other boundary conditions which come into play with the analytical device, e.g. the IR-camera. Calibration or regeneration steps can as well be performed over the multiplicity of all sensor materials. Any given chemical compound that comes into contact with the sensor through the passing fluids will result in a specific activity pattern on a spatially fixed library of sensor materials that is unique for the given compound. While the pattern therefore serves as an identifier, the intensity of the pattern represents the quantitative amount of this compound in the mixture. For proof-of-concept experiments we used a 96-fold-sensing device. The sensor library consists of seven different material classes, all synthesized via classical impregnation techniques in different compositions on multihole monolithic ceramic supports (93 different materials based on different concentrations of binary/ternary mixtures of transition metals, three inert materials). We demonstrate with these results the wide range of capabilities for the IR-Sensography?. Both the qualitative and the quantitative determinations of molecules in the gas phase can be performed with this new methodology.

RF inductive non-destructive testing of carbon composites

Abstract: The application of radio-frequency planar inductive sensors to non-destructive testing of carbon-fiber-reinforced polymer composites, that have become one of essentially important materials in various industry sectors, is discussed in this paper. It is shown that the sensor allows detecting surface and buried defect, and provide the means to evaluate their depth inside the composite.

Dynamic load cell for measuring tensile forces

Abstract: Dynamic load cell for measure tensile forces is formed by metal hoops (1) with a shape memory, while from the inside of the metal hoop (1) with shape memory are attached against each other two pivots (7), on which are both sides loosely attached pull rods (2 ). Each pair of pull rods (2) is in a free end terminated imprison element (8). Perpendicular to the line joining of the pivots (7) is through a fastening sleeve (4) from the inside of the metal hoop (1) embedded inductive sensor (3) flattening deflection () diameter of the metal hoop (1) with a shape memory. The metal hoops (1) of the shape memory is from a flexible, stainless, alloy, low to medium alloy steel. Inductive sensor (3) deformation is through the connector (5) of the cable connected to the measuring apparatus.

Dual Detector With Transverse Coils

Abstract: The invention relates to a dual detector comprising a detection head having: an inductive sensor which is mounted on the platform (11) and includes a transmitter coil (12) and a separate receiver coil (13), the transmitter coil (12) and the receiver coil (13) each forming a loop, a soil penetrating radar (60) comprising a transmitter antenna (61) and a receiver antenna (62), the transmitter antenna (61) and the receiver antenna (62) each being accommodated in the center of one of the loops of the transmitter and receiver coils (12) (13), the transmitter antenna (61) and the receiver antenna (62) having a maximum thickness (e) of one micron in order to limit interference with the inductive sensor (12).