熔锥耦合型光纤声发射传感器系统及其应用

An Optical Fiber Acoustic Emission Sensing System Based on the Fiber Fused Tapered and Coupling Technique and Its Application

摘要: 介绍了基于熔锥耦合技术的光纤声发射传感器和系统。系统响应频率为20~180 kHz，有效峰值灵敏度为-55 dB ref 1 V/μbar。使用该系统实现了对局部放电超声信号的有效测量。光纤传感具有本质安全，抗电磁干扰等优点，在高电压强磁场环境下工作可实现高灵敏度、长期稳定的远程监测，该系统有望在电力变压器局部放电在线监测中得到应用。

Abstract: An optical fiber acoustic emission sensing system based on the fiber fused tapered and coupling technique was introduced. Its working frequency was 20 ~ 180 kHz and the effective peak sensitivity was about -55 dB ref 1 V/μbar. This sensing system could effectively detect the ultrasound signal of partial discharge. It was proved to be suitable for online monitoring of the electric power equipments safety.