每0.001采集1个数据，前150个数据全为零，然后采集到20个为1的数据，之后又采集到50个为零的数据，对上述数据进行数字FFT分析，然后给出源信号与频谱信号的图-0.001 per 1 data collection, the first 150 data all zero, then the collected data from 20 to 1, followed by 50 zero collected data on the number of FFT analysis of the