In the practical application of phased array ultrasonic testing technology,the coupling methods of probe and workpieces mainly include contact method and water immersion method.In the contact detection method,the probe is in di-rect contact with the workpiece,and the detection effect is affected by the workpiece surface roughness and near field re-gion.For the water immersion method,there is a water layer between the probe and the workpiece,which not only has good coupling effect,but also has no near-field influence,so the detection effect is good.This paper analyzed the defect imaging characteristics of the two detection methods,and verified the imaging effect of the same defect through comparative experi-ments.It showed that the water immersion method of phased array ultrasonic detection had better defect display effect and higher signal-to-noise ratio than the contact method.
关键词
相控阵超声检测/水浸法/接触法/缺陷检测/近场区
Key words
phased array ultrasonic detection/water immersion method/contact method/defect detection/near field area
维普
万方数据