地铁杂散电流光纤传感系统的信号采集与处理  

Signal Collecting and Processing in Optical Fiber Sensor System of Stray Current in Metro

作　　者：蔡文娟[1] 李威[1] 叶果[1] 闫磊鹏[1] 

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221008

出　　处：《仪表技术与传感器》2009年第3期107-108,136,共3页Instrument Technique and Sensor

基　　金：江苏省自然科学基金(BK2006037)

摘　　要：目前国内地铁杂散电流的监测采用的是间接的方法,参比电极的寿命和稳定性直接影响监测精度。针对该问题,提出了一种基于光纤传感技术的杂散电流监测新方法。阐述了杂散电流光纤传感器的原理,并针对光纤电流传感器输出信号的特点,重点进行了信号采集过程中前置放大电路、A/D转换电路、通讯电路的设计和信号处理方法的研究。实验表明:该信号采集与处理系统可靠性好、精度高,满足该监测系统的要求。The monitoring method of stray current is indirect at present. The lifespan and stability of reference electrode affect the test results. This paper analyzed some existing problems of traditional monitoring method used in Metro, and theoretically pres- ented a new monitoring method. The paper introduced the theory of optical fiber sensor, and designed the signal collecting pre-am- plifier circuit,A/D convert circuit, communication circuit and signal processing scheme of all-fiber sensing system of stray current. Experiment indicates the signal collecting system is reliable and accurate, satisfies the system requirement.

关 键 词：杂散电流 光纤传感 光电转换 信号采集 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]