【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20～180kHz,有效峰值灵敏度为—55dB ref 1V/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。更多还原

【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.更多还原