Variable-window speed measurement method with acceleration correction for orthogonal photoelectric encoder

The invention provides a variable-window speed measurement method with acceleration correction for an orthogonal photoelectric encoder, and belongs to the technical field of orthogonal encoders, and the method comprises the steps: determining a speed measurement time window Tw, starting timing when a quadruplicated frequency pulse signal PAB arrives, and updating a pulse position under the condition that a steering signal is not changed; the current speed Vcur is determined according to the pulse increment delta p and the timing time delta t, and the angular acceleration alpha is determined according to the change of the current speed Vcur; the speed measurement time window Tw is determined again through the angular acceleration alpha and the current speed Vcur, and adjustment of the speed measurement time window by the current speed is determined according to the pulse increment in the speed measurement time window; the adjustment of the angular acceleration to the speed measurement time window is determined