Displacement transducer system

Details Displacement transducer system Displacement transducer system

G - Physics

01

P

340/135

G01P 13/00 (2006.01) G01D 5/24 (2006.01) G01R 27/26 (2006.01)

Patent

CA 1139393

Abstract. A displacement transducer system for providing a signal indicative of the position of a member, comprising a pair of voltage controlled oscillators the frequency of which is determined by a pair of variable reactance compon- ents, the reactance of one increasing whilst that of the other decreases as the member is moved in one direction and vice versa. The oscillators form part of a pair of phase locked loops to which an AC signal is supplied which depends upon the sum of the reactances of the comparator. The difference of the reactances is derived from the outputs of the oscillators and is used to control a counter which also is supplied with the AC signal. The count value of the counter indicating the difference of the reactances of the components.

331179

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