基于磁致伸縮效應, 利用微分干涉儀, 設計了一種光纖電流傳感順, 可用于高精度、高靈敏度電流和磁場的測量; 分析了用磁致伸縮效應實現光纖電流傳感器的原理, 建立了基于磁致伸縮效應傳感頭的數學模型, 并通過實驗對光纖電流傳感器的輸入2輸出特性、直流偏置特性和精確度等進行了研究。在8～ 200 A 的電流測量范圍內, 測量比差約為0. 5 %。
關鍵詞: 磁致伸縮效應; 電流傳感器; 微分
Abstract: A fiber2op t ic different iat ing current senso r based on magneto st rict ion effect is designed. The? senso r can be used in h igh2sensit ivity, h igh2accuracy measurement fo r elect rical currents and magnet ic field. The p rincip le of the senso r is analyzed, and the theo ret icalmodel is developed and verified th rough experiments. Emp loying the p ropo sed system, the input2output perfo rmances, offset perfo rmances, and accuracy of the senso rw ere experimentally demonst rated, and a rat io erro r of about 0. 5 % w as ach ieved in measured current range from 8 A to 200 A.
Key words:M agneto st rict ion; Current senso r; D ifferent iat ing