Application of phased array ultrasonic inspection for EMUs wheel-set online

Based on application conditions of CRH EMUs wheel-set, a more strictly ultrasonic inspection for online wheel-set is required. To find an optimized solution, phased array ultrasonic testing technology mixed with conventional ultrasonic testing technology is studied. In this article, multi probes arrangement on wheel tread and inner wheel rim are designed, and their ultrasonic fields in wheel rim & wheel disk and defect response are simulated based on CIVA software. Concerning on the special structure of CRH wheel, defect location recognition algorithms in depth and angle are deduced, and they are verified by reference wheel. The inspection feasibility and ability of those designs are proved by huge amount of real CRH wheel-set tests in field application.