Defect Recognition in Thermosonic Imaging

查看全文 作　　者：CHEN [1]Dapeng;WU [2]Naiming;ZHANG [1]Zheng

机构地区：[1]School of Material Science and Engineering, Beihang University, Beijing 100191, China;[2]School of Jet Propulsion, Beihang University, Beijing 100191, China

出　　处：《Chinese Journal of Aeronautics》索引2012年第25卷第4期,共6页

基　　金：Joint Funds of the National Natural Science Foundationof China (61079020) 摘　　要：This work is aimed at developing an effective method for defect recognition in thermosonic imaging.The heat mechanism of thermosonic imaging is introduced,and the problem for defect recognition is discussed.For this purpose,defect existing in the inner wall of a metal pipeline specimen and defects embedded in a carbon fiber reinforced plastic(CFRP) laminate are tested.The experimental data are processed by pulse phase thermography(PPT) method to show the phase images at different frequencies,and the characteristic of phase angle vs frequency curve of thermal anomalies and sound area is analyzed.A binary image,which is based on the characteristic value of defects,is obtained by a new recognition algorithm to show the defects.Results demonstrate good defect recognition performance for thermosonic imaging,and the reliability of this technique can be improved by the method. 关键词：缺陷识别超声成像碳纤维增强塑料频率关系识别问题 CFRP 金属管道脉冲相位

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Defect Recognition in Thermosonic Imaging

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