Title:
位置検出装置
Document Type and Number:
Japanese Patent JP7156249
Kind Code:
B2
Abstract:
A position detection device includes a magnetic scale and a magnetic sensor. The magnetic scale includes a plurality of magnets arranged along a first reference direction. The magnetic sensor includes a plurality of detectors that detect a composite magnetic field. The plurality of detectors are each arranged to satisfy AG=N(M−W)/(n−1), where n is the number of magnets of the magnetic scale, M is a distance from a first end to a second end, W is the width of each of the plurality of magnets and is greater than 0 and less than or equal to M/n, AG is a gap between each of the plurality of magnets and each of the plurality of detectors in a second reference direction, and N is a number greater than or equal to 0.4 and less than or equal to 2.
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Inventors:
Toshio Ishikawara
Takahiro Moriya
Toshihiko Oyama
Takahiro Moriya
Toshihiko Oyama
Application Number:
JP2019203573A
Publication Date:
October 19, 2022
Filing Date:
November 08, 2019
Export Citation:
Assignee:
tdk Corporation
International Classes:
G01D5/12
Domestic Patent References:
| JP20122578A | ||||
| JP201237467A | ||||
| JP3189365U | ||||
| JP2014199182A |
Foreign References:
| WO2019071284A1 | ||||
| US20150050013 | ||||
| US20170059363 |
Attorney, Agent or Firm:
Patent Attorney Corporation Itosin International Patent Office