关键词: 振动检测, 信号滤波, 分布式光纤传感

Abstract:

For the problem that the phasesensitive distributed vibration detection system is susceptible to environmental noise in practical engineering applications, theoretical simulation and field test verification of the filtering algorithm were performed on the system signal. The results show that the highpass filtered differential and average processing of the original signal can effectively remove largescale, lowfrequency and periodic noise signals in the environment. The system signalnoise ratio is improved by 50% and the detection effect is enhanced.

Key words: vibration detection, signal filtering, distributed optical fiber sensing