夹芯板作为一种保温隔热性能良好的新型建筑材料,在建筑工程中逐渐被广泛应用。通过采用超声波法对各种在正常使用过程中可能出现的夹芯板损伤进行检测,并用小波分析技术对超声回波的信号进行去噪处理,并对处理过超声回波信号进行小波分解。结果表明:经过小波去噪和小波分解之后,能够通过识别出反射回波信号的到达时间和各级小波分解的波形较有效地识别出各种类型的损伤。 Sandwich panels as a good insulation properties of new building materials, in the construction project has been widely used. Through the use of ultrasonic method to detect all kinds of sandwich panel damage which may appear in normal use process, the ultrasonic echo signal is denoised by wavelet analysis and the processed ultrasonic echo signal is decomposed by wavelet. The results show that after the wavelet denoising and wavelet decomposition, various types of damage can be identified more effectively by recognizing the arrival times of reflected echo signals and the wavelets of wavelet decomposition at all levels.