Position detecting apparatus using offset calculated from sum of

Details Position detecting apparatus using offset calculated from sum of Position detecting apparatus using offset calculated from sum of

1995-09-29

1997-09-02

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Displacement

32420724, 324225, G01B 714, G01D 5245, G01D 1800, G01D 302

Patent

active

056636431

ABSTRACT:
A position detecting apparatus for a scale measuring system executes a offset correction of the detected three-phase signals A, B and C by using the arithmetic mean (A+B+C)/3 as an offset value. Further, the apparatus executes a gain correction of the offset corrected signals by using a gain which is obtained by the calculation of a square-root of {A.sup.2 +(B-C).sup.2 /3}. Therefore, the accurate measurement is executed by this apparatus even if the gain level is changed at a turn-on of an electric source of this apparatus.

REFERENCES:
patent: 5453684 (1995-09-01), Nakayama
Patent Abstracts Of Japan, vol. 009, No. 265, Oct. 1985, JP-A-60 114714.

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