论文部分内容阅读
布里渊光时域反射计检测信号较微弱的自发布里渊散射光,其布里渊频移只有11GHz左右。相干检测是一较好的方法,但其接收信号是一宽带的幅度调制信号,难以直接解调。采用实时小波变换对传感信号进行处理,设计了布里渊光时域反射计传感器实验系统,实现了25km的分布式温度传感,在5m的空间分辨率和1min的响应时间下,达到40με的应变分辨率。
Brillouin optical time-domain reflectometer detection signal is weak spontaneous Brillouin scattering light, the Brillouin frequency shift of only 11GHz or so. Coherent detection is a better method, but the received signal is a wideband amplitude modulation signal, it is difficult to direct demodulation. The real-time wavelet transform is used to process the sensor signal, and a Brillouin optical time-domain reflectometer sensor experimental system is designed to achieve a distributed temperature sensing of 25km with a spatial resolution of 5m and a response time of 1min, reaching 40με The strain resolution.