Invention Grant
- Patent Title: Electromagnetic induction type absolute position measuring encoder
- Patent Title (中): 电磁感应式绝对位置测量编码器
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Application No.: US13550040Application Date: 2012-07-16
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Publication No.: US08928311B2Publication Date: 2015-01-06
- Inventor: Kouji Sasaki
- Applicant: Kouji Sasaki
- Applicant Address: JP Kawasaki-Shi
- Assignee: Mitutoyo Corporation
- Current Assignee: Mitutoyo Corporation
- Current Assignee Address: JP Kawasaki-Shi
- Agency: Rankin, Hill & Clark LLP
- Priority: JP2011-161399 20110722
- Main IPC: G01R7/14
- IPC: G01R7/14 ; G01D5/20

Abstract:
In an electromagnetic induction type absolute position measuring encoder having two or more tracks which includes: two or more rows of scale coils, each row including scale coils numerously arranged on a scale along a measuring direction so as to have a scale pitch different from that of another row; and transmitter coils and receiver coils provided on a movable grid relative to the scale in the measuring direction so as to face the scale coils, and which can measure an absolute position of the grid with respect to the scale on the basis of a flux change detected at the receiver coil via the scale coil when the transmitter coil is excited, coil lines are added to at least one side of the scale coils in the measuring direction at least in one of the tracks.
Public/Granted literature
- US20130021024A1 ELECTROMAGNETIC INDUCTION TYPE ABSOLUTE POSITION MEASURING ENCODER Public/Granted day:2013-01-24
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