基于SOC单片机的pH值检测与控制

Detection and Control of pH Value Based on SOC MCU

基于SOC单片机C8051F020设计了pH值的信号放大电路和抗干扰电路,并依据pH值的测量原理nernst方程对pH值进行校正。针对多因子水环境反应过程中pH值滞后、非线性、时变、耦合性等特点,采用模糊PID控制算法控制电磁阀调节水环境中的pH值,并且将模糊逻辑工具箱与Matlab函数相结合,在Matlab中Simulink环境下进行了仿真研究,仿真结果表明模糊PID参数自调整对于pH值的控制具有良好的控制效果,具有动态性能好,稳态精度高,抗干扰性能好及较强的鲁棒性。

This paper designs a kind of signal amplification circuit and anti-interference circuit based on MCU C8051F020,the appara-tus is used to detect and control the change of pH value in water environment,also it makes adjustment for pH value according to Nernst equation. According to the properties of pH,such as timelag、nonliner、time-varying、coupling,fuzzy-PID is applied to control the electromagnetic valve to adjust value of pH,and simulation research of this control method has been done under the SIMULINK too...