Invention Grant
- Patent Title: Receiver line spacing in inductive position encoder
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Application No.: US16024269Application Date: 2018-06-29
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Publication No.: US10551217B2Publication Date: 2020-02-04
- Inventor: Ted Staton Cook
- Applicant: Mitutoyo Corporation
- Applicant Address: JP Kanagawa-ken
- Assignee: Mitutoyo Corporation
- Current Assignee: Mitutoyo Corporation
- Current Assignee Address: JP Kanagawa-ken
- Agency: Seed IP Law Group LLP
- Main IPC: G01B7/14
- IPC: G01B7/14 ; G01B7/30 ; H01F5/00 ; G01D5/20 ; G01B7/00 ; G01B11/14

Abstract:
An electronic position encoder includes a scale comprising a first pattern track of signal modulating elements (SME) periodically arranged at a wavelength λ1 and a second pattern track of SME periodically arranged at a wavelength λ2, a detector, and a signal processing configuration. The detector includes a field generating coil configuration, a first set of sensing elements configured to provide detector signals based on the first pattern track, and a second set of sensing elements configured to provide detector signals based on the second pattern track. The first set of sensing elements include a first spatial phase subset of sensing elements and a second spatial phase subset of sensing elements that are connected to the signal processing configuration via at least a first pair and a second pair of connection lines that include respective crossover segments that extend across or overlap the second pattern track. The respective crossover segments are positioned at locations spaced apart along a measuring axis direction by a distance N*λ2, where N is an integer.
Public/Granted literature
- US20200003583A1 RECEIVER LINE SPACING IN INDUCTIVE POSITION ENCODER Public/Granted day:2020-01-02
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