Data for: Damage imaging of composite structures using multipath scattering Lamb waves

Files "cpchnorm_*.csv" are recorded from the pristine plate as the baseline signal. While files "cpchdama_*.csv" are captured after the simulated damage (i.e., added mass) is introduced. In these files, the first column is the sampling time, the second one is the original chirp excitation, and the third one is the Lamb wave response captured at the receiver (i.e., PZT). The 20 files at the same state are averaged to improve the signal-to-noise ratio, and the toneburst response is extracted from the averaged signal.文件"cpchnorm_*.csv"为从完好平板（pristine plate）采集得到的基准信号；而文件"cpchdama_*.csv"则是在引入模拟损伤（即附加质量）后采集得到的实验数据。此类文件中，第一列为采样时间，第二列为原始啁啾激励信号，第三列为在接收器（即PZT）处采集到的兰姆波（Lamb wave）响应信号。为提升信噪比，对同一状态下的20个文件的数据取平均值，并从平均后的信号中提取猝发脉冲响应（toneburst response）。