基于二步法的多芯電纜非侵入式電流測量校正方法

宋憲; 張勇軍; 寧貝飛; 汪偉

doi:10.13374/j.issn2095-9389.2017.12.017

基于二步法的多芯電纜非侵入式電流測量校正方法

doi: 10.13374/j.issn2095-9389.2017.12.017

宋憲¹,
張勇軍^1, ,,
寧貝飛¹,
汪偉²

1) 北京科技大學工程技術研究院, 北京 100083
2) 清華大學機械工程系, 北京 100084

詳細信息

中圖分類號: TP212.13
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出版歷程
- 收稿日期: 2017-01-12

Calibration method for the noninvasive current measurement of multicore cables based on two-step estimation

1) Institute of Engineer Technology, University of Science and Technology Beijing, Beijing 100083, China
2) Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

摘要

摘要: 為了解決多芯電纜的非侵入式電流測量由于被測對象信號微弱、系統靈敏度高、易受環境因素干擾，造成測量誤差較大的問題，采用磁阻傳感器的非侵入式電流測量系統為研究對象，在分析系統測量方法及硬鐵、軟鐵和比例因子等誤差構成的基礎上，提出一種基于二步法的誤差校正方法，該方法通過對傳感器輸出信號進行非線性變換，構造了與誤差相對應的矩陣方程，并在對方程求解后進行非線性回歸計算，從而實現對多芯電纜的電流測量值的動態誤差修正.實驗結果表明，該方法可以同時校正非侵入式電流測量系統的線性誤差與部分非線性誤差.
- 非侵入式測量 /
- 多芯電纜 /
- 二步法 /
- 校正
Abstract: The noninvasive measurement of multicore cables using space magnetic field analysis has characteristics of weak signal intensity, high sensitivity, and vulnerability to environmental or elemental interference. To calibrate the hard iron bias, soft iron bias, and scale factor of magnetoresistance sensors based on noninvasive measurements for multicore cables, a two-step estimation-based calibration method was proposed. This method establishes the error-related linear matrix equations through the nonlinear transformation of the sensor output signal and undertakes nonlinear regression calculation after solving the equations, thus implementing dynamic error correction for the measurement of multicore cable current. Results show that this method can simultaneously calibrate linear and partial nonlinear errors of noninvasive current measurement devices for multicore cables.
- noninvasive measurement /
- multicore cable /
- two-step method /
- calibration

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參考文獻(14)

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