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《Journal of Applied Acoustics》 2019-06
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Instantaneous phase envelope imaging and compensation in aluminum plate using array of Lamb waves

FAN Jiawei;LI Guanghai;WANG Qiang;College of Quality and Safety Engineering, China Jiliang University;China Special Equipment Inspection and Research Institute;  
Aiming at the problem of the identification and location of multi-crack in the plate structure, an envelope algorithm for instantaneous phase total focus imaging and a velocity compensation method based on the pulse duration of the excitation signal are proposed. The ability of identifying and locating multicrack by instantaneous phase envelope total focus imaging after velocity compensation is verified by numerical simulation and experiment. The results show that compared with amplitude total focus imaging, this method can effectively reduce the virtual image caused by noise, direct wave and end echo, and improve the recognition rate of defects. Compared with phase total focus imaging, this method can achieve single-peak focusing at the defect and facilitate the positioning of defects. Five defects are imaged and located on the aluminum plate using the imaging algorithm and the average error of the location was 12.24 mm.
【Fund】: 国家重点研发计划项目(2016YFF0203002)
【CateGory Index】: TG115.28
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【Citations】
Chinese Journal Full-text Database 3 Hits
1 ZHOU Zhenggan;PENG Di;LI Yang;HU Hongwei;School of Mechanical Engineering and Automation, Beihang University;School of Automotive and Mechanical Engineering,Changsha University of Science and Technology;;Research on Phased Array Ultrasonic Total Focusing Method and its Calibration[J];机械工程学报;2015-10
2 ZHENG Yang HE Cunfu WU Bing ZHOU Jinjie (College of Mechanical Engineering and Applied Electronics Technology,Beijing University of Technology Beijing 100124);Guided wave arrays for large plate structures inspection[J];声学学报;2013-01
3 WU Bin,LIU Qi,JIAO Jing-pin,HE Cun-fu(College of Mechanical Engineering & Applied Electronic Technology,Beijing University of Technology,Beijing 100124,China);Experimental Research of Lamb Wave Tuning in Model Control[J];实验力学;2011-06
【Co-citations】
Chinese Journal Full-text Database 1 Hits
1 XU Kailiang;TAN Zhao;TA De'an;WANG Weiqi;Department of Electronic Engineering,Fudan University;;Dispersion compensation and mode separation of the ultrasonic guided waves[J];声学学报;2014-01
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