Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (4): 142-146.doi: 10.3969/j.issn.1000-565X.2013.04.024

• Physics • Previous Articles    

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

Chen Guo-hua1 Liang Jun1,2 Wang Xin-hua2   

  1. 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
  • Received:2012-04-28 Revised:2012-10-10 Online:2013-04-25 Published:2013-03-01
  • Contact: 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． E-mail:mmghchen@scut.edu.cn
  • About author: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．
  • 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

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