自功率谱是分析非平稳信号频谱的重要手段。对于非平稳信号来说，利用自功率谱分析能够更容易找到信号中能量聚集区域，对信号中的频率分布有更好的了解。本文件中将其制作成独立子VI方便程序直接调用。(Self power spectrum is an important method to analyze the spectrum of non-stationary signals. For non-stationary signals, it is easier to find the energy a

使用者可以顺利提取感兴趣区域，但需要根据自己的感兴趣区域设置ROI坐标值(The user can extract the region of interest, but it needs to set the ROI coordinate value according to the region of interest)