红外热波无损检测的检测能力是一个受到普遍关注的问题，所谓检测能力一般是指对某种特定材料所能检测到缺陷的最小尺寸和最大深度。笔者采用航空航天常用玻璃钢材料，设计出六个形状相同、深度不同的斜槽型空气缺陷的试件，这样的设计能够体现缺陷尺寸和深度的线性变化。试验通过调整加热能量和热像仪采样频率探索该试件检测能力的最佳试验条件，分析在不同深度下所能检测到的最小缺陷的尺寸。

The detecting capability of infrared thermal wave nondestructive testing technique has attracted much attention. In general, the detecting capability is referred to the detected defects minimum size and maximum depth in some specific material. The experimental results of pulse heating thermal wave nondestructive testing technique of fiber glass material is shown, which is widely used in aviation and aerospace and so on. The sample is excavated six identical flume defects at different depth. The design can reflect the linear change of the width and the depth of the defects. The optimum condition for the detecting capability such as heating energy and infrared camera capture frequency is discussed.