Research on Parallel PZT Phased Array Based Structural Health Monitoring in CFPR

Phased array theory can control the Lamb wave beam steering in certain range by adding the time delay to the signals. Phased array theory is used to identify the damage in the structure. One dimensional PZT array is restricted in monitoring distance. Two parallel PZT sensor arrays are utilized to monitor the CFPR structure to extend the monitoring distance and to improve the precision of the damage localization. The experiment is done on the CFPR structure by using two parallel PZT arrays to detect the damage in the structure. The result of the experiment is shown on the mapped image. Gray-scale in the mapped image from dark to light corresponds to the signal amplitude from low to high. The highlight of the mapped image is the damage location in the structure. The monitoring results in the CFPR structure by two parallel PZT arrays is accurate and identical.