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Magnetic position sensor

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TLDR
In this article, the position of a measurement object in a certain length range can be accurately determined and easily by using a permanent magnet, which is movable along a strip-shaped soft magnetic core.
Abstract
For displacement measurement, ie, the determination of the position of a measurement object (11) can be as a measurement target, a permanent magnet used, which is movable along a strip-shaped soft magnetic core (2) when the soft magnetic core (2) by two excitation coils (3, 4) in opposite directions is magnetized and located between the excitation coils (3, 4) a secondary coil (5). In this way, the position of a measurement object in a certain length range can accurately determine and easily.

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Patent

Position sensor detecting linear or rotary movement - has permanent magnet attached to moving part displayed relative to stationary core with associated measuring coil

TL;DR: In this article, the position sensor has an elongated magnetic coil (3, 4, 5) with a stationary soft magnetic core (6) having a small cross section relative to its length.
Patent

Magnetic displacement sensor

TL;DR: In this paper, the sensor has a magnetic core (3) containing crystalline strips (4) and amorphous strips (5), carrying a measuring winding (2), coupled to a constant current source (1).
Patent

Position sensor for contactless detection of defined positions of axially and angularly movable shaft

TL;DR: In this article, a magnetic displacement sensor is arranged with its axial direction (6) effective for the displaceable magnet parallel to the longitudinal axis (4) of the shaft (1).
Patent

Path sensor arrangement for use in brake system of motor vehicle, has displacement element with position sensor magnet, which is displaceably arranged relative to soft magnetic coupling element along measurement direction

TL;DR: In this paper, the arrangement has a primary coil (1) and two secondary coils (2, 3) coupled with a soft magnetic coupling element (4), where a magnetic field produced by a position sensor magnet (7) of a displacement element (10) influences the coupling element, so that a relative position between the elements (4, 10) is detected by one of the coils.
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