Bulk acoustic wave Barker code sequence and the application in ultrasonic NDT

A simple and convenient method to gain bulk acoustic wave Barker code sequence is presented,corresponding results of correlation processing are given too. The transducer response of unit electric pulse is used as unit code of acoustic signal to constitute Barker code sequence. The phase precision of code sequence as well as fairly ideal response function are guaranteed by high accuracy of DATA-2020 and DATA-6000.The main reason of some deviation between experiments and theory is caused by the transient response and time delay characteristics of the ultrasonic transducer.