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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2017/208752
Kind Code:
The purpose of the present invention is to minimize a drop in detection accuracy caused by magnetic flux, which is bent due to a disturbance magnetic field, passing through the sensor core. This magnetic sensor device 1 comprises a first row 71 of magnets positioned on one side in a first direction X with respect to a magnetic sensor element 12, and a second row 72 of magnets positioned on the other side. The first row 71 of magnets comprises: a first magnetic flux attracting magnet 72B that adjoins, in a second direction Y, a first magnetizing magnet 71A that magnetizes a medium 2; and a second magnetic flux attracting magnet 71C that adjoins the first magnetic flux attracting magnet 72B in a second direction Y. The first magnetic flux inducing magnet 72B and the second magnetic flux inducing magnet 71C are equipped with magnetic poles that differ from the adjoining magnets, and attracts the magnetic flux of the adjoining magnets. As a consequence, there is little risk of the magnetic flux in the vicinity of the magnetic sensor element 12 being bent by disturbance magnetic fields and passing through the sensor core 32, thereby making it possible to reduce noise caused by disturbance magnetic fields.

MOCHIDA, Tetsuo (5329 Shimosuwa-machi, Suwa-gu, Nagano 11, 〒3938511, JP)
Application Number:
Publication Date:
December 07, 2017
Filing Date:
May 10, 2017
Export Citation:
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NIDEC SANKYO CORPORATION (5329, Shimosuwa-machi Suwa-gu, Nagano 11, 〒3938511, JP)
International Classes:
G01R33/02; G07D7/00; G07D7/04
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