Non-invasive current monitoring microsystem based on a single TMR sensor

被引：0

作者：

Lu W. ^{[1
,2
]}

You R. ^{[3
]}

Zhou Y. ^{[4
]}

Yuan H. ^{[4
]}

You Z. ^{[1
,2
]}

机构：

[1] Department of Precision Instruments, Tsinghua University, Beijing

[2] Beijing Laboratory for Biomedical Detection Technology and Instrument, Beijing

[3] School of Electronics Engineering and Computer Science, Peking University, Beijing

[4] Department of Engineering Physics, Tsinghua University, Beijing

来源：

Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2020年 / 41卷 / 06期

关键词：

Coreless structure; Current monitoring; Microsystem; Non-invasive detection; Tunneling magnetoresistance;

D O I：

10.19650/j.cnki.cjsi.J2006189

中图分类号：

O441.2 [磁学]; TM12 [];

学科分类号：

摘要：

A low-cost non-invasive coreless current monitoring microsystem is proposed for production and living power safety, which is based on a single monaxial tunneling magnetoresistance sensor. The principle and key points for measuring cable current with the magnetoresistance sensor are demonstrated. A detachable package with limit mechanism is designed to ensure the reliability of the measurement transfer relationship with the compact structure and convenient measurement. It does not need the traditional redundant magnetic core or multi sensors. The high integration and low power microsystem hardware are realized. The accurate measurement and calibration algorithms are achieved by software. A test environment is built according to the city power specification. Test results show good linearity and consistency of the developed current monitoring microsystem. A maximum error of 1.5% in the 0~8 A range is verified within the national standard of 0.5 level. It also has good long-time stability and anti-interference ability to adjacent line, which shows the developed microsystem suitable for most residential power monitoring scenarios. © 2020, Science Press. All right reserved.

引用

页码：1 / 9

页数：8

共 21 条

[1] YANG Q, SUN SH P, SIMA W X, Et al., Progress of advanced voltage/current sensing techniques for smart grid, High Voltage Engineering, 45, 2, pp. 349-367, (2019)
[2] ZHU K, PONG P W., Performance study on commercial magnetic sensors for measuring current of unmanned aerial vehicles, IEEE Transactions on Instrumentation and Measurement, 4, pp. 2178-2180, (2019)
[3] NIBIR S J, HURWITZ E, KARAM M, Et al., A technique to enhance the frequency bandwidth of contactless agneto-resistive current sensors, IEEE Transactions on Industrial Electronics, 63, 9, pp. 5682-5686, (2016)
[4] GUO F Y, LI CH, WANG ZH Y, Et al., Identification of number of fault phases in three-phase series fault arc, Journal of Electronic Measurement and Instrumentation, 32, 12, pp. 185-190, (2018)
[5] BAO G H, JIANG R., Research on series arc fault detection based on asymmetrical distribution of magnetic flux, Chinese Journal of Scientific Instrument, 40, 3, pp. 54-61, (2019)
[6] HUANG H H, YAN B CH, ZHAO CH W, Et al., Optimized FFT analysis for leakage current detection of zinc oxide arrester, Journal of Electronic Measurement and Instrumentation, 33, 4, pp. 87-93, (2019)
[7] LI P, YUAN ZH Y, TIAN B, Et al., Micro current measurement technology based on tunnel magnetoresistance, Southern Power System Technology, 13, 4, pp. 2-17, (2019)
[8] CHAN J Y, TSE N C, LAI L L., A coreless electric current sensor with circular conductor positioning calibration, IEEE Transaction on Instrumentation and Measurement, 62, 11, pp. 2922-2928, (2013)
[9] OUYANG Y, HE J L, HU J, Et al., Contactless current sensors based on magnetic tunnel junction for smart grid applications, IEEE Transactions on magnetics, 51, 11, (2015)
[10] ZHANG J, PENG W, TU J H, Et al., Development of nonintrusive current sensor for two-wire power cords, China Measurement and Test, 44, 5, pp. 71-76, (2018)

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