Current sensor based on diamond nitrogen-vacancy color center
Zi-Yang Shi(史子阳), Wei Gao(高伟), Qi Wang(王启), Hao Guo(郭浩)†, Jun Tang(唐军), Zhong-Hao Li(李中豪), Huan-Fei Wen(温焕飞), Zong-Min Ma(马宗敏), and Jun Liu(刘俊)
Shanxi Province Key Laboratory of Quantum Sensing and Precision Measurement, School of Instrument and Electronics, North University of China, Taiyuan 030051, China
Abstract High precision current measurement is very important for the calibration of various high-precision equipment and the measurement of other precision detection fields. A new current sensor based on diamond nitrogen-vacancy (NV) color center magnetic measurement method is proposed to realize the accurate measurement of current. This new current method can greatly improve the accuracy of current measurement. Experiments show that the linearity of the current sensor based on diamond NV color center can reach up to 33 ppm, which is superior to other current sensors and solves the problem of low linearity. When the range of input current is 5-40 A, the absolute error of the calculated current is less than 51 μA, and the relative error is 2.42×10-6 at 40 A. Combined with the research content and results of the experiment, the application of the current sensor in the field of current precision measurement is prospected.
Fund: Project supported in part by the National Natural Science Foundation of China (Grant Nos. 51922009, 51727808, 62175219, 62103385, and 51821003), the Key Laboratory of Shanxi Province (Grant No. 201905D121001), and the Shanxi ‘1331 Project’ Key Subjects Construction.
Zi-Yang Shi(史子阳), Wei Gao(高伟), Qi Wang(王启), Hao Guo(郭浩), Jun Tang(唐军), Zhong-Hao Li(李中豪), Huan-Fei Wen(温焕飞), Zong-Min Ma(马宗敏), and Jun Liu(刘俊) Current sensor based on diamond nitrogen-vacancy color center 2023 Chin. Phys. B 32 070704
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