Sinusoidal signal frequency rapid estimation method and device based on rotation adjustment

The invention discloses a rapid sinusoidal signal frequency estimation method and device based on rotation adjustment, and the method comprises the steps: S01, carrying out the sampling and truncation of a to-be-estimated sinusoidal signal according to a preset sampling frequency, and obtaining a discrete sinusoidal signal sequence; s02, performing discrete Fourier transform on the discrete sinusoidal signal sequence to obtain a discrete spectrum sequence; s03, calculating a module value sequence of the discrete spectrum sequence, and searching a spectrum position corresponding to a maximum value; s04, calculating a value adjacent to the maximum value in the module value sequence according to the frequency spectrum position corresponding to the maximum value in the module value sequence; s05, according to the adjacent values obtained through calculation, correction position parameters are obtained; s06, calculating a first parameter and a second parameter according to the corrected position parameter by adopt