Development of Wireless Ultrasonic Propagation Imaging System

In recent years, the laser ultrasonic propagation imaging (UPI) system has attracted many researcher. In this paper, we present the laser ultrasonic propagation imaging system with the wireless sensing system to realize wireless UPI system. The wireless laser UPI system consist of a very ground structural health monitoring (SHM) system, preamplifier-integrated piezoelectric (PZT) sensor, and wireless ultrasonic device (WUD). The ground SHM system has laser system and Laptop/Personal Computer. The computer initiates the WUD board to acquire ultrasonic wave and laser scanning system to start scanning. The computer uses Wi-Fi communication to communicate with WUD. The WUD, on detecting ultrasonic wave generated by impinging of the laser, collects the wave, digitizes it, and send it wirelessly to the ground SHM system. To find the efficiency of WUD, the ultrasonic wave data was collected using both wired and wireless connection and compared them with each other.