基于单片机的小区恒压供水系统设计论文.doc

泰 山 学 院 本科毕 基于单片机的小区恒压供水系统的设计 所 在 学 院 机械与工程学院 专 业 名 称 机械设计制造及其自动化 申请学士学位所属学科 工 学 年 级 二〇一一级（3+2） 学生姓名、学号 黄承蒙 2011170257 指导教师姓名、职称 张秀红 讲师 完 成 日 期 二〇一三年五月 摘要 ABSTRACT Reasonable development and protection and utilization of water resources is a difficult task to construct economic society. Modern high-rise residential area tend to have low water use, water time, the characteristic of the large changes in water consumption, high energy consumption of the residents and thus lead to the water supply system, low reliability, pipeline system is imperfect and so on. And serious waste of a lot of water. With mature and widely used frequency conversion speed regulation technology, the use of PID regulator, frequency converter, MCU, pressure sensors such as organic combination, constitute a control system, the use of inverter control of pump rotation speed, adjust the output of the pump, the pipe network pressure to adjust to a reasonable range, realize constant pressure water supply of high-rise building. Due to the water pump power consumption power and the motor speed of the direct ratio three times, so it has good energy saving effect through the pump speed control, compared to the average power consumption to save close to 40% of the normal use of water. Using AT89C51, can realize the main pump frequency conversion, the auxiliary pump soft start, short circuit protection, over current protection function, stable and reliable work, greatly extend the service life of motor. Key words: Constant pressure frequency conversion water supply, SCM，Energy-saving  目录 1 引言 1 1.1 课题研究的提出 1 1.2 变频恒压供水系统的主要优点 1 1.3 本课题的主要研究内容 2 2 变频调速恒压供水理论分析 3 2.1调速原理 3 2.2系统的节能原理分析 3 2.2.1供水系统特性与工作点 3 2.2.2流量调节的方法 4 2.2.3 流量调节方法的比较 5 2.3变频恒压供水系统的组成及原理图 6 3 系统结构与设备选型 9 3.1 系统结构总体设计 9 3.2单片机的选择 9 3.3 PID控制算法与其实现 10 4 硬件设计 12 4.1 系统工作过程说明 13 4.2 变频器部分硬件设计 14 4.2.1主电路 14 4.2