基于石英挠性加速度传感器的测量系统设计

Based on the differential capacitor structure of quartz accelerometer, this paper designs a measurement method for high precision and stability using the amplitude and frequency characteristics of the resonant circuit. This method is based on the principle that the amplitude of the input signal is different in distinct resonance frequency. After the A/D conversion, the data collected is read by the FPGA and transmitted through USB. At last the acceleration measurement system is calibrated with a standard accelerometer, and also the sensitivity and stability of this system are tested. The result turns out that this system can realize the measurement of high precision and stability.