变厚度多边形蜂窝结构的超声C扫描检测方法

为了解决变厚度多边形蜂窝结构超声波检测难和检测效率低的问题,采用了灵敏度补偿和多边形扫查路径规划相结合的超声C扫描方法进行检测。在扫查检测过程中,一是根据构件厚度变化进行灵敏度补偿,消除因厚度变化而引起的超声信号衰减对检测结果的影响;二是根据构件几何形状对此类构件进行多边形扫查路径规划,减少探头的空扫描范围,提高检测效率。试验结果表明:该检测方法能准确、高效地检出变厚度多边形蜂窝结构中的缺陷。

Ultrasonic C-scan method of variable thickness polygonal honeycomb structure

In order to solve the problem of ultrasonic detection of polygonal honeycomb structure and low detection efficiency, an ultrasonic C-Scanning method combining sensitivity compensation and polygonal scanning path planning is adopted. Firstly, sensitivity compensation is made according to the thickness variation of the components to eliminate the influence of ultrasonic signal attenuation caused by thickness change during the test. Secondly, polygonal scanning path planning method is carried out according to the geometrical shape of the component, which can reduce invalid scan area of the probe and improve the efficiency. The results show that this method can accurately and efficiently detect the defects in variable thickness polygonal honeycomb structure.