摘要
对小波变换检测信号奇异性理论进行阐述。以DCVG/CIPS组合仪器检测数据为对象,利用小波变换对阴极保护埋地管道通电电位、断电电位和电压梯度检测信号进行处理,根据小波变换模极大值对应着信号奇异点理论,实现了覆盖层缺陷点位置的准确定位。实验表明,该方法定位准确,具有一定的实用性。
The theory of signal singularity detection by wavelet transform is introduced. The data that is detected by the combined instrument of DCVG and CIPS is research＇s target. The theory of wavelet transform is used to process the detection signals of ON potential ,OFF potential and voltage gradient, and the breaking position of protective coating is located accurately according to the theory that the extreme modulus value of wavelet transform responds to the singular point of signals. The engineering experience shows that the defect position is accurate to locate,which can meet the needs of engineering application.
出处
《现代制造工程》
CSCD
2007年第6期94-96,共3页
Modern Manufacturing Engineering
基金
国家"十五"科技攻关计划资助项目(2004BA803B02-02)
关键词
埋地管道
小波变换
奇异性
缺陷
定位
Buried pipeling
Wavelet transform
Singularity
Defect
Locating
