基于瞬态电磁响应的埋地细长良导体目标长度和方位估计

doi:10.11999/JEIT160718

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Abstract

It is particularly important to estimate the geometric features of buried pipe cables in urban construction and municipal infrastructure maintenance. For this kind of subsurface thin-wire structure targets, a method for estimation of the length and orientation of a target based on transient electromagnetic responses is proposed. In this method, a time delay difference model of the backscattering responses from such thin-wire structures illuminated by electromagnetic wave at Brewster’s angle with horizontal polarization is established. By analyzing the time-frequency distribution of the transient responses, the relationship between the resonant state and the target length is established and the length of the target is estimated. The energy change between the early time responses and late time resonances is applied to determining the time sequence of the arrival of the electromagnetic wave to the target. Then the target orientation is estimated by the time delay difference of early time responses. Numerical simulation results show that the proposed method is effective in the case of the direction of electric field close to the target axial direction. Meanwhile, the proposed method is robust to noise, and can be applied to length estimation for SNR≥5 dB and orientation estimation for SNR>10 dB.

Key words： Transient responses Resonances Length estimation Orientation estimation

Received: 07 July 2016 Published: 28 February 2017

PACS:

TN957.52

Fund:

The National Natural Science Foundation of China (61371186, 61162007), Guangxi Natural Science Foundation (2013GXNSFFA019004)

Corresponding Authors: OUYANG Shan E-mail: hmoysh@guet.edu.cn

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	ZHOU Lijun
	OUYANG Shan
	LIAO Guisheng
	JIN Liangnian

Cite this article:

ZHOU Lijun,OUYANG Shan,LIAO Guisheng等. Estimation of Length and Orientation of Subsurface Thin-wire Structures Based on Transient Electromagnetic Responses[J]. JEIT, 2017, 39(6): 1424-1431.

URL:

http://jeit.ie.ac.cn/EN/10.11999/JEIT160718 OR http://jeit.ie.ac.cn/EN/Y2017/V39/I6/1424

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