Automated Ultrasonic Measurements in Thin Samples
Journal Title: International Journal of engineering Research and Applications - Year 2017, Vol 7, Issue 9
Abstract
Pulse echo technique is widely used for ultrasonic velocity measurements in solids and liquids, but fails to measure ultrasonic velocity in thin samples. In such situations total reflection technique is extremely useful. In the present work, PC based total reflection technique is developed using ultrasonic transmitting and receiving transducers, operated at 1MHz, fitted to the two opposite walls of water tank. The thin sample under study is suspended between the transmitting and receiving transducers; and rotated about an axis perpendicular to the direction of wave propagation. The angle of rotation of the metallic plate is controlled precisely by stepper motor with additional gear arrangement to the resolution of 0.25°. Critical angles for longitudinal and shear components of an ultrasonic wave correspond to the maxima observed at two angles of longitudinal and shear wave component, respectively. This technique has been found to be very effective in thin samples in the light of dating.
Authors and Affiliations
S. U. Dubey, S. Rajagopalan, S. J. Sharma
Keywords
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- DOI 10.9790/9622-0709032629.
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