Concrete Crack Detection Using Piezoelectric Sensors Based on Time Reversal Method

Time reversal approach has been widely utilized as an efficient damage detection tool. Structural damage, such as crack and delamination, generates nonlinearities that break down the signal reconstruction characteristic of time reversal method. As a result, the difference between the original input signal and the reconstructed signal shows damage. According to the time reversal approach, an input wave signal may be rebuilt at any excitation point by reversing the output signal recorded at another point of the structure in the time domain and retransmitting it back to the excitation point.