Chinese Optics Letters, 2020, 18 (3): 031202, Published Online: Feb. 24, 2020   

Current sensor based on an atomic magnetometer for DC application Download: 790次

Author Affiliations
1 College of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, China
2 College of Physics, Huazhong Normal University, Wuhan 430079, China
Abstract
A DC current sensor based on an optically pumped atomic magnetometer is proposed. It has a 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 a high accuracy with a non-moment solenoid and magnetic shielding to suppress the influence from the 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.

Guozhu Li, Qing Xin, Xuxing Geng, Zhi Liang, Shangqing Liang, Guangming Huang, Gaoxiang Li, Guoqing Yang. Current sensor based on an atomic magnetometer for DC application[J]. Chinese Optics Letters, 2020, 18(3): 031202.

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