Inductive displacement transducer

Details Inductive displacement transducer Inductive displacement transducer

G - Physics

08

C

336/28, 340/135.

G08C 21/00 (2006.01) G01D 5/20 (2006.01)

Patent

CA 1169941

Abstract of the Disclosure An inductive displacement transducer includes a primary and at least two secondary coils with a movable coupling member for varying the amount of mutual coupling therebetween as a function of the displacement of a movable member. The secondary coils are wrapped around magnetic cores which are embedded in a disc- shaped core structure. The coupling member comprises a pair of magnetic conductive arms disposed on either side of the core structure and attached to a shaft rotatably received by a central axial bore in the core structure. An end of the shaft may be attached to the movable member. A control circuit excites the primary coil with an excitation signal with abrupt repetitive transients so that voltage spikes appear in the secondary coils with an amplitude related to the amount of mutual coupling. The voltage spikes are integrated into a D. C. voltage with an amp- litude of the voltage spikes and thus, indicative of the dis- placement of the movable member.

385812

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