Invention Grant
- Patent Title: Displacement sensor and displacement detection method
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Application No.: US14759710Application Date: 2013-12-18
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Publication No.: US09772198B2Publication Date: 2017-09-26
- Inventor: Tetsuya Shimizu , Hideki Kubo , Satoshi Hanaka , Tatsuo Ota , Shogo Terada
- Applicant: Murata Machinery, Ltd.
- Applicant Address: JP Kyoto
- Assignee: MURATA MACHINERY, LTD.
- Current Assignee: MURATA MACHINERY, LTD.
- Current Assignee Address: JP Kyoto
- Agency: Keating & Bennett, LLP
- Priority: JP2013-002329 20130110
- International Application: PCT/JP2013/083884 WO 20131218
- International Announcement: WO2014/109190 WO 20140717
- Main IPC: G01D5/14
- IPC: G01D5/14 ; G01R25/00 ; G01R17/00 ; G01D5/244

Abstract:
In a linear displacement sensor, two magnets with different polarities define one pitch of a magnetic scale. kn (k is a natural number greater than or equal to 2, n is a natural number greater than or equal to 1) sensor units configured to output a plurality of signals whose period is one pitch and whose phases with respect to the pitch are different are arranged along the magnetic scale in a one-pitch segment. Periodic errors with n periods per pitch of the sensor units are canceled out by averaging the phases from the kn sensor units.
Public/Granted literature
- US20150345992A1 DISPLACEMENT SENSOR AND DISPLACEMENT DETECTION METHOD Public/Granted day:2015-12-03
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