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Dubey, P. K.
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article
Development and study of ultrasonic immersion testing system for industrial and metrological application
Abstract
<jats:title>Abstract</jats:title><jats:p>Ultrasonic non-destructive testing (NDT) is one of theprominent field involving inspection to evaluate defects, cracks,deposition or fusion of welding materials and dimensionalmeasurements of the test piece(s). Ultrasonic immersion scanningsystems are useful for various industrial and metrologicalapplications. The conventional immersion system uses a dedicatedpulser receiver module for the excitation and detection of signalfrom transducer and a fast analog data acquisition card (DAQ) toacquire the raw data into computer. Rigorous digital signalprocessing and filtering is used to extract desired information fromthe raw data. In the present work, development of an ultrasonicimmersion C-scan testing system, intended for industrial andmetrological applications, is described. The developed system uses acommercial ultrasonic flaw detector (UFD) for the data acquisitionrather than using pulser receiver and DAQ card to acquire ultrasonicinformation. The software for the same has been developed in VisualBasic .NET framework to control all five servo motor based axes ofthe ultrasonic immersion scanning tank. The developed software scansthe sample automatically with parameters specified by the user. Theparameters include echo amplitude, echo location, separation betweentwo echoes, and ultrasonic attenuation. The developed softwaregenerates the data files that can later be used for further analysisusing suitable data analysis software such as Origin or MSexcel. The functionality of the developed system has been tested forthe detection of flaws present in the material, testing forthickness variation and ultrasonic attenuation. The developed systemis capable of detecting the location of defects within theresolution of ±0.01 mm. Ultrasonic transducer movementresolution of ±0.01 mm over the sample, results in togeneration of a high quality image.</jats:p>