光子学报, 2017, 46 (12): 1206001, 网络出版: 2017-11-23
基于时分复用的多点式环形腔光纤电流传感器
Multipoint All-fiber Current Sensor Using a Fiber Loop Based on Time-division Multiplexing
导波光学 光纤电流传感器 时分复用 多点式 光纤环形腔 Guidewave optics Fiber optics current sensors Time-division multiplexing Multipoint Fiber loop architecture
摘要
为实现输电线路上的多点电流监测,利用通信用普通单模光纤, 设计基于时分复用的多点式光纤环形腔结构电流传感器.多路传感系统共用一套光源、检测设备和数字信号处理系统, 在节约成本的同时,提高了利用率.实验中选用双路全光纤电流传感器结构, 在两个不同的点同时测量电流, 其中一测量点对0~600 A范围内的电流进行测量, 另一测量点对0~1 500 A范围内的电流进行测量.对实验数据进行线性拟合, 结果表明: 循环次数取8比较合适, 此时系统具有比取2时高约3~4倍的灵敏度; 两个测量点光信号的偏振态与电流之间有良好的线性关系, 两个传感单元的灵敏度不同, 而且相互之间没有串扰是各自独立的传感系统.
Abstract
In order to realize multi-point current monitoring on power line, a multipoint all-fiber current sensor was described on the principle of time-division multiplexing using ordinary silica fibers and a fiber loop. The multi-channel sensor system was used to share a set of light source, detection equipment and digital signal processing system, which can improve the utilization rate while saving cost. In experiment, a dual-channel fiber current sensor structure was used to measure the current at the same time in the two different points. The direct current of a measurement point ranged from 0 A~600 A and the direct current of another survey points ranged from 0 A~1 500 A. The experimental data is fitted with linear fitting. The results show that the suitable cycle number K is 8 and the current sensitivity of K=8 was approximately 3 to 4 times as high as when K=2. The dual-channel fiber current sensor had good linear responses for both channels between the output signal ΔP and the current I. The channels are independently affected by the current, they require separate calibration.
蒋俊贞, 张昊, 何友武, 邱怡申. 基于时分复用的多点式环形腔光纤电流传感器[J]. 光子学报, 2017, 46(12): 1206001. JIANG Jun-zhen, ZHANG Hao, HE You-wu, QIU Yi-shen. Multipoint All-fiber Current Sensor Using a Fiber Loop Based on Time-division Multiplexing[J]. ACTA PHOTONICA SINICA, 2017, 46(12): 1206001.