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Wheel set is one of the most important components for railway vehicles. Comprehensive NDT wheel set ensuring system and corresponding equipment have been developed in some countries to ensure the safety of wheel set. LU automatic ultrasonic inspection system for in-service wheel set has been widely applied in Chinese high speed train, which uses advanced phased array ultrasonic technology to inspect...
Rail is one of the vital components of the railway system. Rail flaw detection plays an important role in ensuring the safety of railway transportation. Nowadays, rail inspection system based on conventional ultrasonic technology can't meet the practical application needs well due to the problems of low-detection coverage rate and inconvenient to change ultrasonic angle. To solve those problems, a...
In order to process real-time phased array ultrasound imaging, to improve imaging resolution, and achieve on-line defect detection, total focusing method (TFM) imaging algorithm is used for the complete data, thrust reversers the focus and algorithm in different positions, the computational problems of large data can be solved by the FPGA parallel algorithms. After that, the total focusing method...
Total focusing method (TFM) is a post-processing algorithm for ultrasonic imaging, usually used for processing linear array data. In this paper, TFM is extended to obtain three-dimensional (3D) image based on two-dimensional array data. However, it takes a long time to get 3D information from large amount of 2D array data by TFM. So Sub-aperture matrix capture (SMC) and sparse array are taken into...
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