小波分析在腐蚀电化学瞬态检测中的应用  

THE APPLICATION OF WAVELET IN TRANSIENT MEASUREMENT OF CORROSION ELECTROCHEMISTRY

作　　者：高志明[1] 宋小平[1] 庞兴收[1] 宋诗哲[1] 

机构地区：[1]天津大学材料学院,天津300072

出　　处：《中国腐蚀与防护学报》2001年第4期245-249,共5页Journal of Chinese Society For Corrosion and Protection

基　　金：国家重点基础研究发展规划项目 (G19990 65 0 )

摘　　要：选用适宜的多分辨分析小波滤波方法对恒电流瞬态技术的响应信号进行处理 ,滤除各种噪声干扰 ,应用于高绝缘性能防护层缺陷的检测 .同时设计了采用特定尺度对小幅度正弦波激励响应信号进行连续小波变换的方法 ,提取原信号中与激励信号相同频率的真实信息 。Multi-resolution analysis was used to treat the galvanostatic transient response signals of underground pipeline system ,the information was denoised with satisfactory result.The continuous wavelet transformation was also introduced to corrosion electrochemistry measurement to pick up the useful information to diagnosis the defect of underground pipeline system from the response of small amplitude sine current with high disturbance. It was shown that the wavelet transformation has the good properties of retrieving the useful information from the disturbed signal.

关 键 词：小波分析 暂态测试 防护层 腐蚀 电化学 

分 类 号：TG174.36[金属学及工艺—金属表面处理]