Programmable Ultrasonic Flaw Detection Using Pulser Receiver Card

Pulse echo technique is widely used in ultrasonics to characterize the material under study, as it requires a single transducer for transmitter and receiver. In the present work, we have developed software to use pulser receiver card, DUSC880 from KEIYU NDT CO. TAIWAN in flaw locator. The card generates narrow train of pulses that are fed to the piezoelectric transducer which generates ultrasonic pulses that propagate through the material under test. Echoes from the back wall and the flaw (if any) are detected by the same transducer. The control panel for data acquisition, process and display is developed in VC++. Designed software displays flaw along with its position (depth) from the surface with the resolution of ±0.2 mm. The measurements are calibrated using standard calibration block. The software is successfully tested to detect position of the flaw in the various materials under test thereby enlarging the domain of application of pulser receiver card.