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Design and implementation for the PWM closed-loop feedback interface circuit of a sandwich capacitive accelerometer based on ARM
International Journal of Modern Physics B ( IF 1.7 ) Pub Date : 2021-03-26
Haitao Chen, Lufeng Che

Owing to the advantages of small size and high integration that accelerometers made by MEMS technology, the Pulse Width Modulation (PWM) closed-loop feedback interface circuit of a sandwich capacitive accelerometer based on ARM is designed. Based on the design, a simulation by SIMULINK and a PCB board-level circuit are conducted. Simulation and measurement are provided to support the design. The realization of Proportion Integral Differential (PID) control algorithm and the generation of PWM are performed by STM32 microcontroller instead of the circuit in the design. The output form of the interface circuit is PWM with different duty cycle and filtered DC voltage. According to the measurement results, the output of the PWM duty cycle change is 16.9%/g, and the sensitivity is 1.045 V/g.



中文翻译:

基于ARM的夹心式加速度传感器PWM闭环反馈接口电路的设计与实现。

利用MEMS技术制造的加速度计具有体积小,集成度高的优点,设计了一种基于ARM的夹心式加速度计的脉宽调制(PWM)闭环反馈接口电路。基于该设计,进行了SIMULINK的仿真和PCB板级电路。提供仿真和测量以支持设计。比例积分微分(PID)控制算法的实现和PWM的生成是由STM32微控制器而不是设计中的电路执行的。接口电路的输出形式是具有不同占空比和滤波后的直流电压的PWM。根据测量结果,PWM占空比变化的输出为16.9%/ g,灵敏度为1.045 V / g。

更新日期:2021-03-26
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