Journal of South China University of Technology(Natural Science) >

2013 , Vol. 41 >Issue 4: 142 - 146

DOI: https://doi.org/10.3969/j.issn.1000-565X.2013.04.024

Physics

TDOA-Based Location and Its Correction of Acoustic Emission Source with Slewing Ring

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  • 1.Institute of Safety Science & Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China;2.Guangzhou Academy of Special Equipment Inspection & Testing,Guangzhou 510180,Guangdong,China
陈国华(1967-)，男，博士，教授，主要从事工业安全与风险评价技术及管理信息系统、过程装备安全可靠性及风险评价技术等研究．

Received date: 2012-04-28

  Revised date: 2012-10-10

  Online published: 2013-03-01

Supported by

质检公益性行业科研专项( 201110032) ; 广东省安全生产专项( 2012-7)

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Abstract

In this paper,the acoustic emission source with slewing ring is roughly located via a linear time-difference-of-arrival ( TDOA) location method. Then,in order to overcome the low precision resulting from the threshold-based TDOA estimation and improve the location accuracy of acoustic emission source,a correction signal isconstructed,and the corresponding smooth pseudo Wigner-Ville distribution ( SPWD) is calculated to obtain a correctionvalue of the threshold-based TDOA.The results show that the corrected TDOA helps to improve the locationaccuracy of the acoustic emission source with slewing ring,with a maximum absolute error decreasing from 23.63mmto 11.57mm.

Key words： acoustic emission; source location; linear time-difference-of-arrival location; smooth pseudo Wigner-Ville distribution; slewing ring

Cite this article

Chen Guo-hua Liang Jun Wang Xin-hua . TDOA-Based Location and Its Correction of Acoustic Emission Source with Slewing Ring[J]. Journal of South China University of Technology(Natural Science), 2013 , 41(4) : 142 -146 . DOI: 10.3969/j.issn.1000-565X.2013.04.024

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