CAJ | 학술논문

实现了一种由多个光纤法布里珀罗传感器构成的声发射传感系统,可用于变压器局部放电的检测与定位.该系统利用光纤法布里珀罗声发射传感器实现信号采集,利用门限检测的方法实现信号检测,并通过计算信号达到不同传感头的时延差实现放电源的空间定位,具有传感头尺寸小、系统结构简单、抗电磁干扰性能强等优势.
실현료일충유다개광섬법포리박라전감기구성적성발사전감계통,가용우변압기국부방전적검측여정위.해계통이용광섬법포리박라성발사전감기실현신호채집,이용문한검측적방법실현신호검측,병통과계산신호체도불동전감두적시연차실현방전원적공간정위,구유전감두척촌소、계통결구간단、항전자간우성능강등우세.
An acoustic emission sensing system is constructed with four fiber Fabry-Perot sensors, which can be used in power transformer partial discharge detection and location. Ultrasonic signals are added on the reflected optical signals by fiber Fabry-Perot acoustic emission sensors and converted to electrical signal. The threshold decision method is adopted in the system to judge whether the ultrasound wave has already arrived to the sensor instead of using Analog to Digital (A/D) converters, data sampling and analysis. Based on the signal arrival time delay of different sensor partial discharge can be located. The system has very small size and good immunity to electromagnetic interference and can be constructed easily.