超声C扫描成像已逐渐成为复合材料构件普遍研究和采用的检测技术之一。在对超声波声场探讨的基础上，采用基于超声时域的检测方法，通过机械装置、控制电路、发射电路、接收电路和信号处理电路等部分的设计，研制了一种速度快、功能强的超声波C扫描自动检测系统。该系统具有成本低廉、检测速度快、误检率低和显示直观等优点。经对布纤维复合材料试验表明，该系统能够检测出直径为 1 mm的气孔，能够实现对微小缺陷的成像检测。

Ultrasonic C-scan imaging is an adopted method in composite materials. According to the principle of ultrasonic testing and characteristic of acoustic field, the display in depth is studied. A system of C-scan ultrasonic automatic testing is desighed. It includes host computer, singlechip, ultrasonic emission circuit, incept circuit, signal processing and so on. It has high speed, low costs and accurate testing. The expriment results show that the method can detect a stoma of 1 mm diameter in composite materials. It can realize testing flaws in materials.