基于地震动信号的管道安全监测系统的研究

Research on Pipeline Security Monitoring System Based on Seismic Signal

针对目前广泛存在的油气管道周边安全问题,提出基于地震波信号检测和处理的管道安全监测方法.地震检波器组及处理单元组成的检测系统采集管道周围地面入侵目标在活动时产生的地震动信号;由于不同目标产生地震波信号的频率、能量等特征不同,通过小波变换的时频分析方法处理这些信号,可以获得不同传感器测量信号中入侵目标特征频率出现的时间差异;根据时间差和传感器阵列与入侵目标的相对位置,实现对入侵目标的空间定位.通过对实验外场实测数据的分析验证了本文提出的方法.

A pipeline security monitoring method based on the seismic signal detection and processing was proposed aiming at the oil and gas pipeline peripheral security problem. When the ground was impacted the produced seismic signals were acquired by the detecting system composed of geophones and processing unit. Because of the eigenvalue frequencies and characteristic energy difference existing in the signals produced by different object impacts, these signals were processed using the time-frequency analysis method of wavelet transformation to get the time differences when the different target eigenvalue frequencies appearing in different sensor signals. According to the time difference and relative position between the sensor array and invasion target, the spacial location of invading target can be realized. The detection method above was verified through the outside experiments and data analysis.