Blade vibration measurement key phase reference signal generation device

The utility model discloses a blade vibration measurement key phase reference signal generation device, which comprises a controller, and a rotating speed measurement sensor, a driving and conditioning module, a level conversion module, a phase-locked frequency multiplication unit and a fractional frequency division unit which are connected in sequence, the phase-locked frequency doubling unit comprises a phase discriminator, a loop filter, a voltage-controlled oscillator and a frequency divider which are sequentially connected end to end; the controller is connected with the level conversion module, the fractional frequency division unit and the frequency divider; according to the utility model, by utilizing the advantages of high synthesis frequency stability, low phase noise level and short frequency establishment time of the phase locking technology, through phase comparison of the phase discriminator and signal feedback of the frequency divider, a phase error between an original test rotating speed signa