Delay time calculations for testing transverse defects of cylindrical surface artefacts with phased array ultrasonic

Xue-ping Jiang; Jing Jia; Yun-fei Yue; Qing-bang Han

doi:10.1117/12.2505306

31 August 2018 Delay time calculations for testing transverse defects of cylindrical surface artefacts with phased array ultrasonic

Xue-ping Jiang, Jing Jia, Yun-fei Yue, Qing-bang Han

Author Affiliations +

Proceedings Volume 10835, Global Intelligence Industry Conference (GIIC 2018); 108350L (2018) https://doi.org/10.1117/12.2505306
Event: Global Intelligent Industry Conference 2018, 2018, Beijing, China

Abstract

Bars or tubes are widely used in all kinds of equipment such as automobile shafts or power plant boilers. Effective detection of internal transverse defects is very important to the security of the equipment. In this paper, the time-delay algorithm for the detection by using the combination of a phased array ultrasonic probe and a wedge was discussed. Firstly, a coordinate system was established and the position of each element was calculated. The focal point position of phased array ultrasonic wave was specified. Secondly, based on the geometric acoustics assumption, the equation of the sound wave incident location of each element and its scope on the interface between wedges and artifacts were deduced by using Fermat's principle. The numerical method was implied to solve the equations. And the delay time of each element of the array was computed. Finally, the computed delay time of each element was imported to the finite element model and the acoustic beam was simulated. The result shows that the detecting waves can be focused to the specified position by using the calculated delay time. This paper provides a method to calculate the delay time of each element of phased array probes for detecting the transverse defects of cylindrical surface artefacts.

Citation Download Citation

Xue-ping Jiang, Jing Jia, Yun-fei Yue, and Qing-bang Han "Delay time calculations for testing transverse defects of cylindrical surface artefacts with phased array ultrasonic", Proc. SPIE 10835, Global Intelligence Industry Conference (GIIC 2018), 108350L (31 August 2018); https://doi.org/10.1117/12.2505306

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