Title:
MAGNETIC SENSOR APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/065894
Kind Code:
A1
Abstract:
Disclosed in the embodiments of the present invention is a magnetic sensor apparatus. The apparatus comprises a magnetic field generation portion, a magnetic sensor portion and a signal processing portion, wherein the magnetic sensor portion comprises a first magnetic sensor arranged at a first position, a second magnetic sensor arranged at a second position, and a third magnetic sensor arranged at a third position; the first position, the second position and the third position are on the same horizontal line and are arranged at equal intervals; magnetic fields generated by the magnetic field generation portion at the three different positions are different; the signal processing portion comprises a first differential circuit, a second differential circuit and a third differential circuit; the first differential circuit generates a first difference between a first signal that is sensed and output by the first magnetic sensor and a second signal that is sensed and output by the second magnetic sensor; the second differential circuit generates a second difference between the second signal and a third signal that is sensed and output by the third magnetic sensor; and the third differential circuit generates a differential measurement signal on the basis of the difference between the first difference and the second difference. By means of the present invention, the impact of a magnetic interfering field can be eliminated, thereby improving the current detection precision.
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Inventors:
GUO HAIPING (CN)
SONG CHEN (CN)
CHEN YE (CN)
SHEN WEIFENG (CN)
XUE SONGSHENG (CN)
SONG CHEN (CN)
CHEN YE (CN)
SHEN WEIFENG (CN)
XUE SONGSHENG (CN)
Application Number:
PCT/CN2022/118641
Publication Date:
April 27, 2023
Filing Date:
September 14, 2022
Export Citation:
Assignee:
MULTIDIMENSION TECHNOLOGY CO LTD (CN)
International Classes:
G01R33/09; G01R33/02
Foreign References:
| CN113945873A | 2022-01-18 | |||
| CN109141482A | 2019-01-04 | |||
| CN204008811U | 2014-12-10 | |||
| CN102565726A | 2012-07-11 | |||
| JP2016217868A | 2016-12-22 | |||
| CN109313223A | 2019-02-05 | |||
| CN111308154A | 2020-06-19 |
Attorney, Agent or Firm:
SHANGHAI LUNGTIN LAW FIRM (CN)
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