收稿日期: 2012-04-28
修回日期: 2012-10-10
网络出版日期: 2013-03-01
基金资助
质检公益性行业科研专项( 201110032) ; 广东省安全生产专项( 2012-7)
TDOA-Based Location and Its Correction of Acoustic Emission Source with Slewing Ring
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)
关键词: 声发射; 源定位; 线性时差定位; 平滑伪Wigner-Ville 分布; 回转支承
陈国华 梁峻 王新华 . 基于线性时差的回转支承声发射源定位及修正[J]. 华南理工大学学报(自然科学版), 2013 , 41(4) : 142 -146 . DOI: 10.3969/j.issn.1000-565X.2013.04.024
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.
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