Detection of laser-generated ultrasound with PVDF transducer

The features of laser ultrasonic technique and its surface acoustical wave are introduced. The principle of laser ultrasonic generation and reception as well as the application of laser ultrasonic technology are presented. The structure, properties and applications of polyvinylidene fluoride (PVDF) piezoelectric film are briefly described. The design concept and experiment methods of the PVDF transducer are discussed. With the experimental setup, the surface acoustic waves generated by pulse laser were received by the PVDF transducer. The signals generated in experiment were analyzed. The results show that this setup is reliable and can be used as a nondestructive detection solution.