Main > HPArticle > Current sensor based on atomic magnetometer for DC application
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  • Manuscript Accepted: Nov. 28, 2019

    Online Published: Nov. 29, 2019

Chinese Optics Letters, 2020, Vol. 18, Issue 3, pp.

Current sensor based on atomic magnetometer for DC application

Li Guozhu, Xin Qing, Geng Xuxing, Liang Zhi, Liang shangqing, Huang guangming, Li gaoxiang, Yang Guo qing

Author Affiliations

  • Hangzhou Dianzi University
  • Hangzhou Dianzi University
  • Huazhong Normal University
  • Huazhong Normal University
  • Hangzhou Dianzi University
  • Huazhong Normal University
  • Huazhong Normal University

Abstract

DC current sensor based on optically pumped atomic magnetometer is proposed. It has high linearity in a wide operation range, since the magnetometer measures the absolute magnitude of the magnetic field produced by the current to be measured. The current sensor exhibits high accuracy with non-moment solenoid and magnetic shielding to suppress the influence from environment. The absolute error of the measured current is below 0.08 mA when the range is from 7.5 mA to 750 mA. The relative error is 5.54×10-5 at 750 mA.

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