针对广泛存在的油气管道周边安全问题，研究了管道周围地面活动目标产生的震动信号的特性，阐述了采用不同传感器测量信号到达时间差来进行定位的方法。地面震动信号是非平稳信号，本文采用希尔伯特黄变换（HHT）处理信号获得其特征频率、幅值与发生的时间，进行目标定位。设计了数据采集系统，通过多个传感器采集目标产生的震动信号，经HHT方法处理得到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。

Aimed at the widely existing peripheral security problems around the oil and gas pipeline, the characteristic of seismic signals generated by the ground moving targets was investigated. The seismic signals which were acquired by many geophones and detection system appeared at different time. The target localization principle based on the arrival time difference is proposed. The seismic signal is typical non-stationary signal. As a new time-frequency method, Hilbert-Huang transform was used to process these signals and obtained the eigenvalue frequencies, the amplitude and the different appearance time. The ground moving localization was achieved. An experiment system was designed and the seismic signals were collected by sensors. Then these signals were processed by HHT method and acquired the different appearance time of target eigenvalue frequency. The arrival time difference, the sensor array location and the relative position of target and sensors were analyzed and the target localization can be achieved. The processing method above was verified through the real experiments data analysis.