A NEW FOCUSING PROBE OF ULTRASONIC AND ITS APPLICATION IN TESTING WELDS
Chen Qinglin
Sichuan Boiler Works, Jintang P. O. Box 207
Chendu, Sichaun, The Peoples Republic of China
Keywords: double crystal, shear wave, curved crystal, focusing, spin welding
ABSTRACT In this paper, a new double crystal focusing shear wave angle probe has been developed. Two crystal of the problem are all curved surface, so that transmitting and receiving are all focussed beam. Its design, structures, and performance parameters are described. Its application in automatic testing for spin welding of thin wall small diameter tubes is also described. Its sensitivity, longitudinal resolution, transverse resolution, and signal-to-noise ratio are much better than that of conventional focusing probe. The experimental results and practice show that this probe can solve the problems of misjudgement and fail of detecting welds of thin wall tubes.
Publication Source: Trends in NDE Science & Technology; Proceedings of the 14th World Conference on Non-Destructive Testing, New Delhi, 8-13 December 1996.Vol. 4, pages 2185 - 2186
Publisher: Ashgate Publishing Company
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