高压电缆悬垂差动互感式非接触位移检测系统  

High⁃voltage cable suspension differential mutual inductance non⁃contact displacement detection system

作　　者：刘国庆 宋玉环 江嘉琪 张子强 徐金田 徐淼淼 LIU Guoqing;SONG Yuhuan;JIANG Jiaqi;ZHANG Ziqiang;XU Jintian;XU Miaomiao(Zhongtian Smart Equipment Co.,Ltd.,Nantong 226010,China;School of Information Science and Technology,Nantong University,Nantong 226019,China;Jiangsu Zhongtian Technology Co.,Ltd.,Nantong 226400,China)

机构地区：[1]中天智能装备有限公司,江苏南通226010 [2]南通大学信息科学技术学院,江苏南通226019 [3]江苏中天科技股份有限公司,江苏南通226400

出　　处：《计测技术》2025年第2期95-103,共9页Metrology & Measurement Technology

基　　金：国家自然科学基金项目(62101287)。

摘　　要：为解决电缆传统接触式传感器精度低、可靠性差等问题,运用电磁感应原理,采用差动互感测量技术,通过发射电路和接收电路的协同工作,研制了一种高压电缆悬垂差动互感式非接触位移检测系统,实现电缆线芯位置的高精度检测。发射电路通过增强85 kHz的正弦信号驱动发射线圈,接收电路将接收到的信号转换为±5 V的直流电压信号和4~20 mA电流信号。为了有效抑制主要集中在接收线圈及其传输路径上的辐射干扰,采用了屏蔽传输线与带通滤波器相结合的方式来减小噪声影响。实验结果表明:在±30 mm位移范围内的传感器线性度和灵敏度性能最佳,线性度高达97.49%,灵敏度达到35.93 mV/mm。该系统显著提高了高压电缆的位移检测精度,克服了传统检测方法的局限性,展现出良好的稳定性和可靠性。To solve the problems of low precision and poor reliability of traditional contact sensors in the detection of high‐voltage cable suspension,a non‐contact displacement detection system of high‐voltage cable suspension differential mutual inductance is developed by applying the principle of electromagnetic induction and adopting the differential mutual inductance measurement technology through the coordinated work of the transmitting circuit and receiving circuit,which realizes the high‐precision detection of the position of the cable core.The transmitting circuit drives the transmitting coil by enhancing the 85 kHz sinusoidal signal,and the receiving circuit converts the received signal into±5 V direct voltage signal and 4~20 mA current signal.To effectively suppress the radiated interference,which is mainly concentrated in the receiving coil and its transmission path,a combination of shielded transmission line and band‐pass filter is used to minimize the noise effect.The experimental results show that the best performance of sensor linearity and sensitivity is achieved in the displacement range of±30 mm,with linearity up to 97.49%and sensitivity up to 35.93 mV/mm.This system significantly improves the detection accuracy of high‐voltage cables,overcomes the limitations of the traditional detection methods,and demonstrates good stability and reliability.

关 键 词：传感器设计 非接触位移检测 差动互感技术 抗干扰 静态标定 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置] TB92[自动化与计算机技术—控制科学与工程]