Inductive sensor

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

Dual-Slope Inductance-to-Digital Converter for differential reluctance sensors

Abstract: A new, simple and high accuracy Dual Slope Inductance-to-Digital Converter (DSIDC) suitable for differential reluctance sensors is presented in this paper. Differential reluctance sensors have two inductors that vary in a push-pull manner with-respect-to measurand. Also, the relationship between inductance of such sensors and measurand is non-linear. It is known that a small linear range can be obtained by taking the difference between the values of the sensor inductances. The proposed DSIDC accepts the sensor inductances having nonlinear characteristics, and provides a linear digital output directly proportional to the measurand. The output is linear for the full range of the sensor. As the output is in digital form, it can be easily stored and processed in a digital system. The DSIDC is based on dual-slope analog-to-digital converter principle and possesses many advantages. A prototype DSIDC has been built and tested with a typical differential inductive sensor arrangement with a nominal value of 30mH. Output from the DSIDC was linear for the full range of input and the worst-case error was less than 0.07%.

Monitoring circuit for vehicle lights - detects failure of light using inductive sensor and switches in second standby light

Abstract: The monitoring circuit has a control (16) associated with both lights (L1,L2). The control receives a signal from an inductive sensor (A) detecting the presence of a current supplying the main light. A changeover switch (20) is operated by the control and switches in the standby light (L2) if the main light (L1) fails (i.e. is open circuit). The signal from the inductive sensor is amplified. The control consists of a monoflop whose control input is connected to the sensor. The sensor consists of an aerial. The changeover switch is an electronic switch (e.g. a thyristor) operating an electromagnetic relay.

Inductive sensor and method of use

Abstract: An apparatus and method for measuring the inductance of a wire-loop without direct reference to any particular time-constant or frequency. Low-frequency noise induced into the wire-loop is canceled within the detector circuit and crosstalk between a plurality of adjacent wire-loops is nullified using passive transformers. New wire-loop configurations utilize the permeability-modulated carrier referencing to provide repeatable inductive signatures with less intrusive, and non-intrusive installations.

Engine timing plate

Abstract: An engine timing plate for cooperating with an engine driven timing wheel and an inductive sensor is provided. An arcuate plate is formed to fit internally within an ignition system housing. The plate includes at least two separate slots positioned on an arc such that the plate is movable, relative to two mounting screws of the housing, over a selected angular range for adjusting engine timing. A sensor mount is included for engaging the inductive sensor in a position adjacent to the timing wheel. An elongate window in the plate is positioned for exposing a timing line that is visible on a mounting surface of the housing. The window provides visual guidance with respect to the timing line in positioning the inductive sensor. The elongate window may provide a series of reference lines for more accurately aligning the plate through relative positioning of the timing line with the series of reference lines. As such, the inductive sensor may be readily positioned over the selected angular range along the outside arc of the timing wheel for modifying engine timing.

Compact type non-contact inductive sensor and electric power steering system

Abstract: The utility model discloses a compact type non-contact inductive sensor, which is used for detecting the rotation angle and the torque of an input/output shaft, wherein a torsion bar is connected between the input shaft and the output shaft. The sensor comprises a PCB (printed circuit board), a signal input rotor sleeved on the input shaft, and a signal output rotor sleeved on the output shaft. When the signal input rotor and the signal output rotor rotate, the PCB can sense the rotation angles of the signal input rotor and the signal output rotor, and processes the rotation angles to generate a first angle signal and a second angle signal. The PCB multiplies the first angle signal and the second angle signal by a torsion bar coefficient of the torsion bar to obtain two paths of torque signals. The compact type non-contact inductive sensor disclosed by the utility model can realize integration of the torque and the angle.