According to the character of vibration in reciprocating compressor, the vibration signal was separated from intrinsic frequencies of the system by envelopedemodulation method.
By envelopedemodulation of the resonance in a range of high frequency caused by the shock of low frequency, the resonance demodulation technique can effectively extract the shock features.
共振解调技术对低频冲击的高频共振波形进行包络检波,可以有效地提取低频冲击特征。
3
All circuits of demodulating strong signal envelope are adopted in previous TV's video demodulation, synchronizing demodulations are widely used in video demodulation in the later integrated TV set.