Displacement sensor, method for detecting the optimal...

Details Displacement sensor, method for detecting the optimal... Displacement sensor, method for detecting the optimal...

2007-12-25

2007-12-25

Epps, Georgia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S231180

Reexamination Certificate

active

10610663

ABSTRACT:
A displacement sensor which detects a positional displacement of a movable member, comprises a position signal generating section configured to generate a periodical signal in accordance with movement of the movable member, a generating section of a signal for detecting a reference position, configured to generate the signal for detecting the reference position, when the movable member is in a predetermined position, a reference position detection circuit configured to detect that the movable member is in a reference position based on the signal for detecting the reference position, generated by the generating section of the signal for detecting the reference position, in synchronization with the periodical signal generated by the position signal generating section, and a selecting section configured to be capable of selecting a phase position to be synchronized from a plurality of phase positions on the periodical signal in the synchronization in the reference position detection circuit.

REFERENCES:
patent: 6229140 (2001-05-01), Ishizuka
patent: 7-4991 (1995-01-01), None
patent: 7-203661 (1995-08-01), None
patent: 8-261795 (1996-10-01), None

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