Device and method for quickly calibrating LVDT signal demodulation circuit

The invention provides a device for quickly calibrating an LVDT signal demodulation circuit. The device comprises a standard sinusoidal signal generator, a signal amplifying circuit, a parameter adjusting resistance, a waveband switch, a demodulation circuit, a demodulation circuit to be calibrated and an acquisition terminal, wherein the standard sinusoidal signal generator is connected with the signal amplifying circuit, and the parameter adjusting resistance is connected in series with the waveband switch and then connected with the signal amplifying circuit; the signal amplifying circuit is connected with the demodulation circuit to be calibrated, the demodulation circuit to be calibrated is connected with the demodulation circuit, and the demodulation circuit is connected with the acquisition terminal. According to the device, a simulative LVDT standard sinusoidal analog signal is injected into the demodulation circuit to be calibrated and demodulated by use of the demodulation circuit, and then the demodulated signal is compared with a theoretical value to realize quick and accurate calibration of the demodulation circuit; the calibration cost is effectively reduced, and meanwhile, the automation of demodulation is realized and the working efficiency of LVDT calibration is effectively improved.