Linear magnetic shaft position sensor monitoring changes in the

Details Linear magnetic shaft position sensor monitoring changes in the Linear magnetic shaft position sensor monitoring changes in the

1995-06-02

1997-07-29

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

32420722, 32420724, 324236, 324655, G01B 714, G01D 520, G01R 2726

Patent

active

056525109

ABSTRACT:
A shaft position detection device for detecting a certain position on a shaft comprising: a movable shaft including a detection portion to be detected, a characteristic of which is different from the other portions; a position detection coil to which the movable shaft is freely inserted; an inductance detecting means for detecting changing of inductance between a case of the movable shaft being in the position detection coil and a case of the movable shaft being out of the position detection coil; in which a position of the detection portion in response to the changing of the inductance. The difference of the magnetic characteristic is defined by a cross section area of the shaft, winding a magnetic tape, forming a magnetic layer.

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patent: 5172298 (1992-12-01), Shimizu et al.
patent: 5450930 (1995-09-01), Martens et al.

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