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

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (24) : 164-170.

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

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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%.

Key words

seismic target / short-time energy / time delay estimation / time difference of arrival(TDOA) localization

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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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