Application of Correlation Coefficient to Data Acquisition of Ultrasonic Smart Pig

Although previous researches on quantitative analysis of ultrasonic defective echoes have been done, few can meet the engineering requirements. Correlation coefficient method is put forward in this study in terms of engineering application to have a quantitative and qualitative analysis of defective echoes. The experiment proves that this method is practical as well as simple, satisfying realtime requirements of data acquisition of ultrasonic smart pig and possessing great value in engineering application.