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根据相控超声波一维阵列柔性探头聚焦原理,针对复杂表面不锈钢工件的内部缺陷检测,基于CIVA无损检测仿真软件,建立了上表面为半径150 mm的圆弧曲面、下表面含有三角形槽和圆形槽的复杂工件模型,分别以10 mm×10 mm分层缺陷及直径2 mm贯穿孔缺陷检测为例,定性及定量地比较了声束偏转及单点聚焦2种聚焦模式在缺陷检测上的区别.结果表明单点聚焦模式可以较好地获得缺陷在定位、定量及定性方面的信息,声束偏转聚焦模式仅能获得缺陷在定性方面的信息,采用2种聚焦模式结合的检测方法,可以获得较好的缺陷检测效果.
According to the principle of one-dimensional array flexible probe focusing by phase-controlled ultrasound, aiming at the internal defect detection of complex surface stainless steel workpieces, an arc-shaped surface with a radius of 150 mm on the upper surface was established based on CIVA nondestructive testing simulation software. Slot complex workpiece model, respectively, with 10 mm × 10 mm layered defects and 2 mm diameter through-hole defects detection as an example, the qualitative and quantitative comparison of the two methods of beam deflection and single-point focus of the difference in the detection of defects The results show that the single-point focusing mode can obtain the information of the defects in the localization, the quantitative and the qualitative information well. The beam deflection focusing mode can only obtain the qualitative information of the defects. By using the combination of two focusing modes, Better defect detection effect.