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Inductive sensor

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


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Patent
03 Aug 2011
TL;DR: In this article, a tension detection system for a high-speed gravure printing machine is presented, which consists of a cylinder, a swing arm, a pendulum roller and a rotating shaft.
Abstract: The utility model provides a tension detection apparatus for a high-speed gravure printing machine, wherein the tension detection apparatus comprises a cylinder, a swing arm, a pendulum roller and a rotating shaft. A cam is fixed on the rotating shaft. An inductive proximity sensor, disposed beside the cam, is fixed on a wallboard via a sensor rack. There is a gap between the inductive proximity sensor and the excircle of the cam. The tension detection apparatus solves the problems of gear slip and abrasion of pinions in the prior art, achieves accurate information detection, and improves the stability of a tension detection system of the high-speed gravure printing machine. In addition, the apparatus is low in failure rate, high in positioning precision and long in service lifetime, and is suitable for various severe environmental conditions.

5 citations

Journal ArticleDOI
TL;DR: In this paper, a planar inductive coil sensor with magnetic yoke was fabricated by sputtering, electroplating, dry etching, and photolithography process, which was composed of the planar coil with inductive magnetic thin film yoke as a sensing component and a single straight typed exciting coil.
Abstract: Alternating magnetic field was used for detection of surface flaws on conductive metallic specimens. The nondestructive sensor probe was composed of the planar coil with inductive magnetic thin film yoke as a sensing component and a single straight typed exciting coil. The planar inductive coil sensor with magnetic yoke was fabricated by sputtering, electroplating, dry etching, and photolithography process. The exciting coil was generated by the alternative current with the range of 0.1-1.2 A with frequency rage of 0.6-1.8 MHz, respectively, which alternating current (ac) magnetic fields by exciting coil were applied to the specimen with artificial flaws. The specimens were prepared with the slit shaped artificial surface flaws (minimum depth and width; 0.5 mm) on metallic plate (Al; nonmagnetic metal and FeC; magnetic metal). The detected signal for the positions and shapes of surface flaws on specimens were obtained with high sensitivity and high signal to ratio by the planar inductive microsensor probe. The measured output signals by the noncontacted scanning on surface of coins (one cent and two euros) were converted to the images of the flaws. These results were compared with the optical images of real coins, respectively.

5 citations

Patent
09 Aug 2006
TL;DR: In this article, a conductive activating element (CAE) fits with a clearance at either side above the sensor coils on a track, and an electric evaluatory circuit detects inductance changes in the CAE's track position.
Abstract: Sensor coils (L1-L5,L1'-L5') attach to a printed circuit board (3) in a planar manner. A conductive activating element (CAE) (7) i.e. a forked metal plate fits with a clearance (a) at either side above the sensor coils on a track. An electric evaluatory circuit detects inductance changes in the sensor coils corresponding to the CAE's track position.

5 citations

Patent
05 Oct 1978
TL;DR: In this paper, a ground vehicle guidance system for following a current-carrying guidewire provides improved steering stability over a wide range of speeds and improved immunity to inductive field anomalies by computing vehicle heading (psi) and lateral displacement (d) using sensor signals themselves substantially insensitive to heading variations, with the sensor signals being processed to provide steering command signals having specified relationships to vehicle steering geometry.
Abstract: A ground vehicle guidance system for following a current-carrying guidewire (w) provides improved steering stability over a wide range of speeds and improved immunity to inductive field anomalies by computing vehicle heading (psi) and lateral displacement (d) using sensor signals themselves substantially insensitive to heading variations, with the sensor signals being processed to provide steering command signals having specified relationships to vehicle steering geometry, so that desired damping factors can be obtained for both forward and reverse travel. Improved vehicle speed-limiting and stopping circuits control truck operation in accordance with computed heading and lateral displacement deviations independently from each other. Steering systems are illustrated both for vehicles using steerable wheels (sw) and vehicles steered by differential drive wheel speed control.

5 citations

Journal ArticleDOI
TL;DR: In this article, a dual-channel heterostructure affords two capacitance plateaus within the capacitancevoltage (CV) characteristic, owing to the two parallel two-dimensional electron gases (2DEGs) located at respective AlN/GaN interfaces.
Abstract: A capacitive wireless sensing scheme is developed that utilizes an AlN/GaN-based dual-channel varactor. The dual-channel heterostructure affords two capacitance plateaus within the capacitance-voltage (CV) characteristic, owing to the two parallel two-dimensional electron gases (2DEGs) located at respective AlN/GaN interfaces. The capacitance plateaus are leveraged for the definition of two resonant states of the sensor when implemented in an inductively-coupled resonant LRC network for wireless readout. The physics-based CV model is compared with published experimental results, which serve as a basis for the sensor embodiment. The bimodal resonant sensor is befitting for a broad application space ranging from gas, electrostatic, and piezoelectric sensors to biological and chemical detection.

5 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202321
202242
202140
202082
201997
201871