熔锥耦合型光纤声发射传感器系统及其应用

摘要

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/^tbar. 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.%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.