关键词: 石油套管 , 双MCU , 漏磁检测 , 小波模极大值

Abstract: Based on the complicated environment well casing laid and size requirement of down - hole , the hardware system suitable to casing inspection was developed to acquire and store the magnetic flux leakage signal , which was cont rolled by dual- MCU. The up - hole location acquiring system was also developed without encoder, by which it can avoid complicated mechanical st ructure and low reliability. The sof tware system developed by Labview could display the magnetic flux leakage signal, and the magnetic flux leakage signal and location were correlated based on wavelet modulus maxima algorithm. Finally the experiment result indicates that the system can detect s the defect s of well casing and displays the magnetic flux leakage signal.

Key words: Well casing , Dual - MCU , Magnetic flux leakage inspection , Wavelet modulus maxima algorithm