Displacement amount detection method and apparatus

Details Displacement amount detection method and apparatus Displacement amount detection method and apparatus

1995-08-10

1998-09-08

Hoff, Marc S.

Coded data generation or conversion

Phase or time of phase change

Synchro or resolver signal

341139, H03M 148

Patent

active

058050906

ABSTRACT:
A displacement amount detection apparatus detects the displacement amount of an object by utilizing two input signals which have a predetermined phase difference therebetween and are output in correspondence with a displacement of the object. The apparatus includes an amplifier which can arbitrarily set the amplification gains of the input signals, and a gain memorizer for dividing the two input signals obtained upon displacement of the object over a predetermined displacement range of the object into a plurality of displacement periods, and for memorizing the partial amplification gains of the amplifier in units of displacement periods on the basis of signals in the respective displacement periods. In addition, a controller selects the gains memorized in the gain memorizer and sets the selected gains in the amplifier when the amplifier amplifies the two input signals.

REFERENCES:
patent: 4360730 (1982-11-01), Breslow
patent: 4360889 (1982-11-01), Liedtke
patent: 5347277 (1994-09-01), Nondahl et al.
patent: 5389927 (1995-02-01), Turney et al.
patent: 5438460 (1995-08-01), Coker et al.

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