利用小波变换对微弱信号进行分析，通过小波变换将微弱信号的小波形式展示出来，方便与时域信号结合来对微弱信号进行分析。(Wavelet transform is used to analyze weak signal, and wavelet transform is used to display the wavelet form of weak signal, which is convenient for analyzing weak signal combined with time dom