基于短时能量时延估计的地震动目标定位方法

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (24) : 164-170.

论文

王阳1,2,窦甲臣3，费春国1，黄楠4，姬雨初1

作者信息 +

A seismic target localization method based on short-time energy time delay estimation

WANG Yang1,2,DOU Jiachen3,FEI Chunguo1,HUANG Nan4,JI Yuchu1

Author information +

文章历史 +

摘要

地面目标运动时激励的地震动信号可用于目标定位和识别。针对时延估计中信号起振点难以获取的问题，提出基于短时能量拟合曲线的起振点估计算法。算法首先对时间窗内信号计算短时能量，并寻找包含有信号起振信息的能量窗。然后对起振处信号进行曲线拟合，找到拟合起振曲线与坐标轴交点，将该点作为起振时间。最后，根据各节点地震动信号起振时间计算到达时间差，并利用TDOA算法对地震动目标进行定位。通过直线定位和平面定位实验对本算法进行了验证，结果表明，直线定位误差小于10公分，平面定位相对误差可控制在10%以内。

Abstract

The seismic signals generated by a ground moving target can be used for target location and recognition.An algorithm based on short-time energy curve fitting was proposed to solve the problem in obtaining the starting point of signal for delay estimation.The algorithm firstly searches the energy window containing the information of the starting point of the signal by calculating its short-term energy.Then, the curve fitting method is used to process the signal nearby the start point, and find the intersection point between the fitting curve and the coordinate axis, which is taken as the starting time.Finally, the starting time of the seismic signal is used to calculate the arrival time difference for the TDOA algorithm to locate the seismic target.The results show that the linear localization error is less than 10 cm and the relative error can be controlled within 10%.

导出引用

王阳1,2,窦甲臣3，费春国1，黄楠4，姬雨初1. 基于短时能量时延估计的地震动目标定位方法[J]. 振动与冲击, 2020, 39(24): 164-170

WANG Yang1,2,DOU Jiachen3,FEI Chunguo1,HUANG Nan4,JI Yuchu1. A seismic target localization method based on short-time energy time delay estimation[J]. Journal of Vibration and Shock, 2020, 39(24): 164-170

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