根据声 -超声基本原理 ,以普通压电陶瓷传感器替代商用声发射超声换能器 ,采用传感器对称布置方式 ,对具有预冲击脱层损伤的碳 -碳复合材料薄板做了声 -超声测试。在对所得试验信号进行小波滤波后 ,应用了能量积分方法量化应力波因子 ,据此值可以区分材料有无损伤 ,并可定性地评估损伤程度 According to the basic principles of acousto-ultrasound, a common piezoelectric ceramic sensor was used to replace the commercial acoustic emission ultrasound transducer. The symmetrical arrangement of sensors was used to test the ultrasonic carbon-carbon composite sheet with pre-impact delamination damage. After wavelet filtering the obtained test signal, the energy integral method is used to quantify the stress wave factor, which can distinguish the material damage, and can qualitatively assess the degree of damage