为检测小型固体火箭发动机药柱包复层界面脱粘、药柱内部的气泡和裂纹而研制的超声检测机,用聚焦声束对药柱表面做螺旋线式的穿透扫查,根据得到的药柱表面展开图可定位及半定量的判断缺陷。为避免使用耦合剂,研制了专用的充油聚焦干耦合超声探头。实验证明,耦合情况稳定效果良好。本方法对其他非金属材料复合材料亦可做无损探伤。 In order to detect small solid rocket engine drug cylinder cladding interface debonding, the inner column of bubbles and cracks in the development of ultrasonic testing machine, the focused beam on the surface of the drug column to do helical scanning, according to the obtained Expanded map of the drug column can be positioned and semi-quantitative judgment of defects. To avoid the use of coupling agents, a dedicated oil-filled, focused, dry-coupled ultrasound probe was developed. Experiments show that the coupling effect is stable and good. The method of non-metallic materials composite materials can also do non-destructive testing.