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Title:
OPTIMIZED EXTREMELY-LARGE MAGNETIC FIELD MEASURING METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/090633
Kind Code:
A1
Abstract:
An optimized extremely-large magnetic field measuring method and device, related to the technical field of magnetic field measurement. The optimized extremely-large magnetic field measuring method comprises the following steps: placing four orthogonally configured tunneling magnetoresistive resistors into an externally applied magnetic field, acquiring the resistances of the tunneling magnetoresistive resistors; calculating the angle between a magnetization direction of a free layer of each tunneling magnetoresistive resistor and that of a reference layer on the basis of the resistances of the four resistors; calculating magnetic field intensity H1 and direction θ1 of the externally applied magnetic field on the basis of the angle between the free layer magnetization direction and the reference layer magnetization direction of the first tunneling magnetoresistive resistor and of that of the third tunneling magnetoresistive resistor; calculating magnetic field intensity H2 and direction θ2 of the externally applied magnetic field on the basis of the angle between the free layer magnetization direction and the reference layer magnetization direction of the second tunneling magnetoresistive resistor and of that of the fourth tunneling magnetoresistive resistor; determining final magnetic field intensity H0 of the externally applied magnetic field on the basis of magnetic field intensity H1 and of magnetic field intensity H2; determining final direction θ of the externally applied magnetic field on the basis of direction θ2 and of direction θ1; and optimizing on the basis of direction θ and of magnetic field intensity H0.

Inventors:
HU JUN (CN)
OUYANG YONG (CN)
HE JINLIANG (CN)
WANG SHANXIANG (CN)
ZHAO GEN (CN)
WANG ZHONGXU (CN)
ZENG RONG (CN)
ZHUANG CHIJIE (CN)
ZHANG BO (CN)
YU ZHANQING (CN)
Application Number:
PCT/CN2017/090544
Publication Date:
May 24, 2018
Filing Date:
June 28, 2017
Export Citation:
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Assignee:
UNIV TSINGHUA (CN)
SICHUAN ENERGY INT RES INST TSINGHUA UNIV (CN)
International Classes:
G01R33/09
Foreign References:
CN106772149A2017-05-31
CN106556806A2017-04-05
US20140266185A12014-09-18
CN102707246A2012-10-03
TW487928B2002-05-21
TW201337302A2013-09-16
CN103885005A2014-06-25
Attorney, Agent or Firm:
CHENGDU JIUDINGTIANYUAN INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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