基于HHT的管道监测系统中目标定位方法研究  

Study on target localization method for pipeline monitoring system based on HHT

作　　者：孙洁娣[1,2] 温江涛[3] 靳世久[1] 

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072 [2]燕山大学信息科学与工程学院,秦皇岛066004 [3]燕山大学电气工程学院,秦皇岛066004

出　　处：《仪器仪表学报》2008年第12期2492-2496,共5页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金重点项目(60534050)资助

摘　　要：针对输油管道由于人为因素造成的破坏,通过研究管道周围地面目标产生的震动信号的特性来进行监测和预警,提出一种基于目标特征频率信号到达时间差进行定位的方法。地震动信号是非平稳信号,通过多个传感器采集目标产生的震动信号,采用希尔伯特-黄变换(HHT)处理获得信号特征频率,以及不同测量信号中目标特征频率出现的时间,结合时间差异和传感器阵列与目标的相对位置实现定位。通过对实验采集数据的分析验证了文中提出的方法是有效的。Aiming at the widely existing destruction of the oil and gas pipeline from human factors, the characteristic of seismic signals generated by the ground targets around the pipeline was investigated and used to monitor and prealarm the pipeline security. This paper proposes a localization method based on the arrival time difference of different target characteristic frequencies. The seismic signals are typically non-stationary signals. The seismic signals generated by different targets are acquired by many geophones and detection modules. As a new time-frequency method, Hilbert-Huang transform is used to process the signals and obtain the characteristic frequencies and appearance time. The arrival time difference, the sensor location and the relative position of the target and sensors are analyzed and the target localization can be achieved. An experiment system was designed and the seismic signals were acquired. The proposed processing method was confirmed effective through real experiment data analysis.

关 键 词：时差定位 希尔伯特-黄变换 经验模态分解 特征频率 地震动信号 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]