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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 Jul 2014
TL;DR: In this paper, photo detectors are used as tunable proximity sensors for detection of target objects and ascertaining their distance from the proximity sensors, and the techniques may be realized as a proximity sensor system including a photo detector having a first doped region, a gate, a second Doped region and a light absorbing region, control circuitry for generating a plurality of control signals to be applied to the photo detector, and a signal detector to detect an output signal from the photo detectors.
Abstract: Techniques for using photo detectors as tunable proximity sensors for detection of target objects and ascertaining their distance from the proximity sensors are disclosed. In one embodiment, the techniques may be realized as a proximity sensor system including a photo detector having a first doped region, a gate, a second doped region and a light absorbing region, a control circuitry for generating a plurality of control signals to be applied to the photo detector, and a signal detector to detect an output signal from the photo detector.

14 citations

Patent
21 Dec 2015
TL;DR: In this article, a sensor circuit is defined as a plurality of half-bridge sensor circuits, including a sensor output value determination circuit and an error determination circuit to generate an error signal based on a first half-branch sensor signal and a second half-bridged sensor signal.
Abstract: A sensor circuit includes a plurality of half-bridge sensor circuits. The sensor circuit includes a sensor output value determination circuit configured to determine a sensor output value. The sensor circuit further includes an error determination circuit configured to generate an error signal based on a first half-bridge sensor signal and a second half-bridge sensor signal. The sensor circuit further includes a control circuit configured to control a selection of one of the first half-bridge sensor circuit and the second half-bridge sensor circuit for providing one of the first half-bridge sensor signal and the second half-bridge sensor signal to the sensor output value determination circuit to determine the sensor output value.

14 citations

Journal ArticleDOI
TL;DR: In this paper, a non-contact proximity sensor that is able to detect any kind of material with low frequency electromagnetic field is proposed, which is simple and based on a single probe, and it has two unique features which are flexibility of the probe and sensitivity to object thickness.
Abstract: In this paper, a non-contact proximity sensor that is able to detect any kind of material with low frequency electromagnetic field is proposed. The sensor is simple and based on a single probe. In addition, it has two unique features which are flexibility of the probe and sensitivity to object thickness. After the theoretical analysis of the operation principle, experiments are given to analyze the validity of the theory and verify the ability of the sensor to detect object's proximity and thickness. Another experiment is also performed to examine the possibility of the sensor to detect the motion of the human heart. The sensor may potentially be applied in non-contact cardiac disease detection, micro-electromechanical systems (MEMS), cheap safe-guard system with one single sensor, thickness monitoring in standardization manufacturing, sport monitoring, and a lot of other places, etc.

14 citations

Patent
Aaru Baanaado Hookuman1
29 Jul 1993
TL;DR: In this paper, a vehicle detector determines the speed of a vehicle which it has detected and then makes a sample measurement after the vehicle has left the detection area of its inductive sensor.
Abstract: A reference value used in a vehicle detector is checked and adjusted. The vehicle detector determines the speed of a vehicle which it has detected and then makes a sample measurement after the vehicle has left the detection area of its inductive sensor. The timing of the measurement is based on the speed of the vehicle. The sample measurement is compared to the reference value, and adjustment of the reference value is made accordingly. In order to identify the cause of changes in the sensor drive oscillator signal frequency, the frequency of the oscillator signal is measured while connected to a dummy sensor not affected by vehicles. The reference value also is adjusted to reflect slow changes (drift) in sensor drive oscillator frequency. To identify changes in sensor drive oscillator frequency caused by mechanical difficulties which require maintenance activity to correct, a rate of frequency change of the sensor drive oscillator signal is determined over the plurality of measurement scanning segments.

14 citations

Journal ArticleDOI
01 Oct 2017
TL;DR: In this paper, the results of simultaneously conducted measurements achieved using capacitive and inductive sensors are presented according to different PD model sources immersed in a mineral transformer insulation oil, all measurements are preceded under laboratory conditions using typical measurement set up commonly applied for on-site PD detection.
Abstract: In the paper results of simultaneously conducted measurements achieved using capacitive and inductive sensors are presented according to different PD model sources immersed in a mineral transformer insulation oil. All measurements are preceded under laboratory conditions using typical measurement set up commonly applied for on-site PD detection: measuring impedance and capacitor and high frequency current transformer (HFCT) are used respectively. Measuring frequency and voltage level influence as well as phase resolved PD patterns analysis are investigated in the research. Various fundamental PD signal descriptors assigned for selected frequencies are also proposed and compared for chosen sensors. The main purpose of the presented research is to compare PD measurement results achieved using selected type of sensors during laboratory measurements and to point the best application areas in fields of PD detection in high voltage apparatus under normal operating conditions. Furthermore a proper measurement results interpretation coming from different sensors as well as measurement conducting problems and achieved patterns disparities are also discussed in the paper.

14 citations


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