文献类型：期刊文献

中文题名：Distance-Coefficient-Based Imaging Accuracy Improving Method Based on the Lamb Wave

英文题名：Distance-Coefficient-Based Imaging Accuracy Improving Method Based on the Lamb Wave

作者：Chen, Shao-Jie[1];Zhou, Shao-Ping[1];Li, Yong[1];Xiang, Yan-Xun[1];Qi, Min-Xin[1]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety MOE, Shanghai 200237, Peoples R China

年份：2017

卷号：34

期号：4

中文期刊名：Chinese Physics Letters

外文期刊名：CHINESE PHYSICS LETTERS

收录：CSTPCD;;EI(收录号：20220711658824);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000401944300014)】；CSCD:【CSCD2017_2018】；

语种：英文

中文关键词：Distance-Coefficient-Based Imaging Accuracy Improving Method Based on the Lamb Wave

摘要：An imaging accuracy improving method is established, within which a distance coefficient including location information between sparse array configuration and the location of defect is proposed to select higher signal- to-noise ratio data from all experimental data and then to use these selected data for elliptical imaging. Tile relationships among imaging accuracy, distance coefficient and residual direct wave are investigated, and then the residual direct wave is introduced to make the engineering application more convenient. The effectiveness of the proposed method is evaluated experimentally by sparse transducer array of a rectangle, and the results reveal that selecting experimental data of smaller distance coefficient can effectively improve imaging accuracy. Moreover, the direct wave difference increases with the decrease of the distance coefficient, which implies that the imaging accuracy can be effectively improved by using the experimental data of the larger direct wave difference.
An imaging accuracy improving method is established, within which a distance coefficient including location information between sparse array configuration and the location of defect is proposed to select higher signalto- noise ratio data from all experimental data and then to use these selected data for elliptical imaging. The relationships among imaging accuracy, distance coefficient and residual direct wave are investigated, and then the residual direct wave is introduced to make the engineering application more convenient. The effectiveness of the proposed method is evaluated experimentally by sparse transducer array of a rectangle, and the results reveal that selecting experimental data of smaller distance coefficient can effectively improve imaging accuracy. Moreover, the direct wave difference increases with the decrease of the distance coefficient, which implies that the imaging accuracy can be effectively improved by using the experimental data of the larger direct wave difference.