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小曲率壳状粘接结构脱粘缺陷热波定量检测
引用本文:杨正伟,张炜,田干,宋远佳,金国锋.小曲率壳状粘接结构脱粘缺陷热波定量检测[J].材料工程,2010(12).
作者姓名:杨正伟  张炜  田干  宋远佳  金国锋
作者单位:第二炮兵工程学院,西安,710025;第二炮兵工程学院,西安,710025;第二炮兵工程学院,西安,710025;第二炮兵工程学院,西安,710025;第二炮兵工程学院,西安,710025
基金项目:国家自然科学基金资助项目(面上项目51075390)
摘    要:采用热波无损检测方法,对某型导弹发动机壳状钢壳体/绝热层试件的脱粘缺陷进行实验研究。针对实验获取的热图存在非均匀性、噪音大、缺陷显示对比度低等问题,基于自适应滤波和分水岭方法对热图进行增强和分割处理,实现了缺陷位置、大小及深度的定量评估。结果表明:热波技术能快速地发现缺陷(几秒钟);对缺陷的定位比较准确,检测结果直观;特别适用于复杂壳状结构的检测,很容易检测出深度4mm、直径15mm的脱粘缺陷,能够满足固体火箭发动机壳体粘接结构的检测需求;并且脱粘面积越大越容易检测,对缺陷直径、深度等参数的估算误差也越小。

关 键 词:小曲率粘接结构  脱粘  热波检测  缺陷识别

Debond in Small Curvature Adhesion Structure Detected by Thermal Wave Nondestructive Testing
YANG Zheng-wei,ZHANG Wei,TIAN Gan,SONG Yuan-jia,JIN Guo-feng.Debond in Small Curvature Adhesion Structure Detected by Thermal Wave Nondestructive Testing[J].Journal of Materials Engineering,2010(12).
Authors:YANG Zheng-wei  ZHANG Wei  TIAN Gan  SONG Yuan-jia  JIN Guo-feng
Affiliation:YANG Zheng-wei,ZHANG Wei,TIAN Gan,SONG Yuan-jia,JIN Guo-feng(The Second Artillery Engineering College,Xi'an 710025,China)
Abstract:Based on thermal wave nondestructive technique,the small curvature adhesion structure with debond defects between steel shell and rubber insulation layer was investigated.For the problem of non-uniformity,high noise and low display contrast of the infrared images obtained by the infrared thermal camera,self-adaptive filtering and watershed segmentation algorithms were used to enhance the image quality and segment the defect from the background.Finally,the defect location,size and depth were estimated quanti...
Keywords:small curvature adhesive structure  debond  thermal wave inspection  defect identification  
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