国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

Dissimilar metal welded structure is prone to damage in the process of use, so it needs to be tested. In this paper, the Transmitter Receiver (TX-RX) is used to detect the defects of dissimilar metal welds. Considering the diverse components and complex structures of dissimilar metal welds, the placement position of the TX-RX probe is optimized. Firstly, a simulation model was established to discuss the influence of the position of the excitation coil on the eddy current and eddy current disturbance in the specimen. The results show that when the excitation coil is above the alloy steel with surfacing welding, the eddy current intensity and eddy current disturbance intensity on the surface are larger. Secondly, an experimental platform was established. The experimental results show that when the excitation coil is placed above the alloy steel with surfacing, the amplitude of the detection signal and the differential signal are the largest. Finally, the peak value of differential signal is used to quantitatively analyze the weld defects. The research content of this paper can provide reference for the application of pulsed eddy current TX-RX probe or array probe in dissimilar metal weld defects.