发布时间：2014-05-05 来源：人大经济论坛

自动化专业论文范文 目 录 摘 要I AbstractI 目录II 引言1 1 系统构成1 1.1 系统框图1 1.2 工作原理2 1.3 系统各部件说明2 2 系统软件8 2.1 程序设计8 2.2 控制流程图8 结论15 参考文献15 摘 要 本课题利用单片机实现对供水压力进行测量与控制。其电路主要采用AT89C51单片机作为压力控制核心，电路用检测元件对检测压力信号进行采样，经过A/D转换为数字信号，送给单片机进行运算控制，单片机的输出信号经过放大电路放大后, 送给24V直流中间继电器控制变频器通过变频器控制电动机的转速以实现对供水压力的控制。 关键字: 传感器，A／D转换，控制器，AT89C51 Abstract This topic realizes using the monolithic integrated circuit to the water supply pressure carries on the survey and the control. Its electric circuit mainly uses at89C51 monolithic integrated circuit to take the pressure control core, the electric circuit to examines the pressure signal with the detecting element to carry on the sampling, transforms after A/D into the digital signal, gives the monolithic integrated circuit to carry on the operating control, monolithic integrated circuit's output signal enlarges after the amplifying circuit, gives 24V to direct current the intermediate relay control frequency changer through the frequency changer control motor's rotational speed to realize to the water supply pressure control. key words: The sensor, A/D transforms, controller, AT89C51