基于自适应二代小波的涂层下裂纹检测研究  

Crack Detection Under Coating Based on Adaptive Second Generation Wavelet

作　　者：王鹏[1] 朱红波 李东江[1] 秦承鹏[1] 何虎昌 江雄[2] 蔡晖[1] 郎梼 WANG Peng;ZHU Hongbo;LI Dongjiang;QIN Chengpeng;HE Huchang;JIANG Xiong;CAI Hui;LANG Tao(Xi'an Thermal Power Research Institute Co.,Ltd.Xi'an,710054,China;Sichuan Huaneng Kangding Hydropower Co.,Ltd.Chengdu,610041,China)

机构地区：[1]西安热工研究院有限公司,西安710054 [2]四川华能康定水电有限责任公司,成都610041

出　　处：《振动．测试与诊断》2021年第4期730-734,832,共6页Journal of Vibration,Measurement & Diagnosis

基　　金：中国华能集团有限公司科技资助项目(HNKJ18⁃H22)。

摘　　要：基于自适应二代小波变换的过流部件涂层下裂纹检测方法,将自适应二代小波变换应用于阵列涡流的检测中,发现阵列涡流检测能够很好地抑制提离效应,且不受缺陷方向的影响,自适应二代小波能够有效匹配信号特征,消除噪声影响,提高信号质量。实验结果表明,基于自适应二代小波变换的阵列涡流检测方法能够有效识别水电站过流部件涂层下裂纹故障,检测精度高,适应性强,具有较好的工程应用价值。The research on crack detection under coating of current components,the adaptive second-generation wavelet transform is applied to the array eddy current detection.The array eddy current testing can suppress the lift off effect and is not affected by the direction of defects.The adaptive second generation wavelet can effectively match the signal features,eliminate the influence of noise and improve the signal quality.The experimental results show that the array eddy current testing method based on adaptive second generation wavelet transform can effectively identify the cracks under the coating of the flow passage parts of hydropower station,with high detection accuracy and strong adaptability,and has good engineering application value.

关 键 词：过流部件 涂层下裂纹 阵列涡流 自适应 二代小波变换 

分 类 号：TH878[机械工程—仪器科学与技术] TG115.28[机械工程—精密仪器及机械]