Rotary mechanical equipment vibration monitoring method and monitoring system

The invention discloses a rotary mechanical equipment vibration monitoring method and monitoring system, and the method comprises the steps: obtaining a vibration signal of rotary mechanical equipment, and analyzing the frequency spectrum of the vibration signal; in combination with the sampling frequency, calculating a frequency spectrum mode function with normalized window length of the Hanning window, and constructing a ratio function based on a spectrum peak-to-peak value and a secondary peak value of the searched frequency spectrum; solving an inverse function of the ratio function to determine a frequency error; eliminating the frequency error to calculate the real frequency; calculating a real amplitude corresponding to the real frequency; correcting the vibration signal by using the real amplitude; analyzing the frequency spectrum of the corrected vibration signal; determining a theoretical power frequency by combining a preset power frequency range, an amplification coefficient and an equipment rotat