Design and Implementation of Excitation Board of Time Reversal Ultrasonic Guided Wave

To solve the problem of exciting time reversal guided waves,a high-voltage excitation board,which was suitable to excite piezoelectric transducer for generating time reversal guided waves,had been designed and implemented.During the design of excitation board,the interacting FSM model was used to synthesize the time reversal signal,amplifier circuit was used to drive high-voltage output stage,and differential structure was employed to realize the high-voltage output stage of exciting board,which ensured high-voltage time reversal wave could be quickly generated in the detection process.Experiment results present that the excitation board generated not only ultrasonic guided waves for the conventional detection,but also the required high-voltage time reversal waves for the piezoelectric transducer,which make sure time reversal technology can used for engineering applications.