Hydropower station set vibration measurement monitoring method

The invention relates to the hydropower station set detection field, and particularly relates to a hydropower station set vibration measurement monitoring method. A piezoelectric acceleration sensor and a pre processing module are provided. A protection data acquisition device finishes A/D data acquisition and is in charge of suppressing sensor resonance signals at the same time; and a low-noise and low-attenuation cable is adopted between the piezoelectric acceleration sensor and the pre processing module, so as to ensure electric signals not to bring attenuation and larger noise in the transmission process. When the piezoelectric acceleration sensor is applied to hydropower station set vibration measurement, features of high sensitivity, low noise, low frequency response and the like are provided, voltage signals outputted by low-frequency small-amplitude vibration signals can be ensured to be strong enough, true low-frequency small-amplitude acceleration signals can be ensured not to be overwhelmed by the noise signals, vibration signals as low as 0.5Hz can be detected, and problems of distortion, or failure, poor precision and the like of the original inertial low-frequency vibration sensor measurement signals are solved.