The invention relates to a quartz gyroscope error suppression method based on time division driving and quadrature electric cancellation and belongs to the technical field of micro mechanical inertial devices. The method comprises the following steps that 1) a driving module outputs a time-division driving sinusoidal signal, and alternately outputs a sinusoidal driving signal and a zero level signal in adjacent time periods; 2) when the driving voltage signal is in a no-signal period, the detection module performs signal detection and generates a quadrature electric cancellation signal, specifically, a weak signal of a detection end is amplified; the weak signal is inputted into a digital processor through digital-to-analog conversion for orthogonal demodulation, and in-phase and orthogonal components of a tuning fork detection signal are obtained; PI control is carried out on the quadrature component amplitude gain to obtain an amplitude parameter of the quadrature electric cancellation signal; a sinusoidal signal output is generated, and a quadrature electric cancellation signal is outputted; and (3) the quadrature electric cancellation signal and the tuning fork detection signal are connected with a capacitor, and accessing to the negative electrode of the amplifier passing is carried out through the detection end. According to the method, the zero drift of the gyroscope caused by electrostatic coupling is thoroughly eliminated, and the circuit change is small.
Quartz gyroscope error suppression method based on time division driving and quadrature electricity cancellation