基于单片机的水塔水位控制系统设计及仿真..docVIP

佳木斯大学毕业论文 学 院 信息电子技术 专 业 通信工程 班 级 级2班 学 籍 号 姓 名 指导教师 佳 木 斯 大 学 2016年6月1日  Abstract As society advances, the development of production processes and production technologies,the detection of the level control system have a higher demand. New electronic technology of microelectronics technology and miniature computers is widely used. Single chip control system to set up operations with high control accuracy, reliable performance, convenient,low cost, is applied to the level contral. This article describes the LM-type liquid level sensor and A / D conversion chip ADC0809, and AT89C51 microcontroller as the main control component of the liquid level detection system design methods. This article respectively from the liquid level detection, A/D converter, Digital display, Limit alarm and several aspects of the hardware circuit have conduct a more detailed description. Then the A/D conversion process, Digital tube display program, Limit alarm procedures have a fairly detailed, and using a flow chart for further explanation. Through joint debugging of software and hardware, The basic realization of the regulation on the level within a certain range of liquid level regulation, Dynamically shows the level results, Achieve alarm, Entirely Achieve the requirements of the mission statement. Keywords: the liquid level detection, A/D converter, lm-type liquid level sensor, limit alarm 目 录 摘要i Abstract......................................................................................................ii 第1章 绪论1 1.1 液位检测系统的概况1 1.2 国内外研究动态1 1.3 本次毕业设计的意义2 1.4 本次毕业设计的任务2 第2章 硬件电路设计4 2.1 硬件电路工作原4 2.2 硬件电路设计4 2.2.1 系统总体设计框图4 2.2.2 核心芯片的介绍5 2.3 硬件电路各模块设10 2.3.1 电源电路设计10 2.3.2 单片机最小系统电路设计10 2.3.3 显示电路设计11 2.3.4 液位传感器的接口电路设计13 2.3.5 AT89C51与ADC0809的接口电路设计13 2.3.6 报警电路设计15 2.4 硬件电路总结15 第3章 软件设计17 3.1 AT89C51的I/O口应用17 3.1.1 P0口的信号输入17 3.1.2 P1口的信号输入17 3.1.3 P2口的信号输入17 3.1.4 P3口的信号输入18 3.2 软件模块设计19 3.2.1 主程序的设计19 3.2.