无线光纤温度传感系统

Wireless fiber-optic temperature sensor system

基于无线通信技术,研究了一种应用于检测电力设施安全性的无线光纤温度传感系统。系统采用光纤传感技术进行温度监测,可以实现具有组网灵活、实时监测等特点的安全传感网络。传感信号处理包括光电转换、前置放大和窄带滤波等电路系统构成,可实现微弱的光电信号的检测,并采用了无线的方式进行传感与控制信号的传输,从而实现对大范围区域的温度监测。实验结果表明,测试范围能达到-20~80℃,准确性在±1.0℃以内,能够满足实际应用的需求。

In this paper,a fiber-optic temperature sensor network system based on wireless telecommunication technology is proposed for monitoring the safety of electric power systems.Compared with the traditional on-line monitoring system,this system deploys a fiber-optic sensor which is immune to electromagnetic interferences and has the advantages of real-time monitoring and easy network constructing.Photoelectric detection of the weak signal is achieved by employing photoelectric transform,pre-amplification,and narrow band pass filter.The sensor data and control signals are transmitted on a wireless network,so the system can achieve a wide sensing coverage easily.The experimental results show that in the temperature range from-20 ℃to ＋80 ℃,the temperature accuracy of the system is higher than±1 ℃.