基于单片机液位控制系统的研究与设计

Research and Design of Liquid Level Control System Based on SCM

液位控制是工业中常见的过程控制,它对生产的影响不容忽视。该设计以单容液位控制为研究对象来模拟工业过程特征,由STC89C52单片机最小系统、DS18B20、超声波传感器模块、4个键盘、LCD1602显示、报警系统和步进电机等组成。它具有设置上下限、超限报警、自动控制步进电机(模拟阀门的开度)液位和测距切换等功能,根据现场控制要求设定液位上下限,当液位低于下限时,装置打开外接水泵进行注水,直到液位达到要求随时停止。

Liquid level control is common in process industry,which impact can not be ignored on the production.The design is mainly used in the occasions where the liquid level control requirements are not high.The system is designed by the STC89C52 microcontroller,the smallest system,DS18B20,ultrasonic sensor module,4 keyboard,LCD1602 display,alarm system and stepper motor and so on.It has set the upper and lower limits,overrun alarm,automatic control of stepper motor(opening simulation valves)level and range switching and other functions,the level limits are set according to the control requirements.When the level is below the lowest limit,the external device will be opened for water pump,until the liquid level reaches the requirements to stop at any time.