Invention Grant
- Patent Title: Displacement sensor, method for detecting the optimal reference position, and method for judging stability of detecting reference position of displacement sensor
- Patent Title (中): 位移传感器，检测最佳基准位置的方法，以及判断位移传感器基准位置检测稳定性的方法
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Application No.: US11871353Application Date: 2007-10-12
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Publication No.: US07825369B2Publication Date: 2010-11-02
- Inventor: Jun Hane
- Applicant: Jun Hane
- Applicant Address: JP Tokyo
- Assignee: Olympus Corporation
- Current Assignee: Olympus Corporation
- Current Assignee Address: JP Tokyo
- Agency: Scully, Scott, Murphy & Presser, P.C.
- Priority: JP2002193448 20020702
- Main IPC: H01J3/14
- IPC: H01J3/14
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.
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