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设计描述：
文档包括:
说明书一份，31页，约19000字
CAD版本图纸，共1张
快热式家用电热水器的设计
摘要: 随着生活的加快，快热式电水器省时的特性越来越被生活在忙碌的人群所接受，随着用电环境的改善，即催生了热式电热水器的快速增长。它体积小，重量轻，要使用热水时即开即用，无需等待，省去了加热多用的热水，因此它具有省时，省电，省水的优点，由于以上原因，快热式电热水器在以后有着极为广阔的发展前景。本设计采用AT89C51作为核心控制器，铺以键盘，显示电路，利用温度传感器DS18B20检测出水口温度，采用双向可控硅控制，单片机通过光耦给可控硅触发信号，控制可控硅的导通角，从面控制电热丝的有效加热功率。
关键词: AT89C51 BS18B20 加热控制 过零检测 蜂鸣报警
Design of Fast Heat Household Electric Water Heater Control System
(College of Technology ,Hunan Agricultural University ,Changsha 400128,China)
Abstract: As life speeding up ,the characteristics of electric water heater Fast heat save more and more acceptable to the crowd of a busy life .It has small size ,light weight, and then you can use the hot water without any wait, therefore if has save water heater in later has a very broad development prospects .The design USES AT89C51 as the detection, the outlet temperature by bidirectional thrusters controlled by single chip computer controlled light-coupler to triggered signals, control silicon-controlled conduction Angle, so as to control the resistance wire effective heating power .
Key words: AT89C51;DS18B20;heating control; zero examination; buzz alarm
目 录
摘要----------------------------------------------------------------------------------------------------------3
关键词-------------------------------------------------------------------------------------------------------3
1 前言-------------------------------------------------------------------------------------------------------4
2 设计方案的选择和论证-------------------------------------------------------------------------------4
3 快热式家用电热水器系统设计----------------------------------------------------------------------4
3.1系统总体方案设计--------------------------------------------------------------------------------5
3.2控制系统的硬件组成及工作原理--------------------------------------------------------------5
3.3控制系统总硬件电路的设计--------------------------------------------------------------------5
3.3.1 温度检测电路---------------------------------------------------------------------------------7
3.3.2 DS18B20与单片机硬件连接电路-------------------------------------------------------7
3.3.3 DS18B20结构-------------------------------------------------------------------------------7
3.4 输出控制电路----------------------------------------------------------------------------------------8
3.5 过零检测电路与5V稳压电路---------------------------------------------------------------------9
3.5.1 过零检测工作原理--------------------------------------------------------------------9
3.5.2 5V稳压电路原理---------------------------------------------------------------------10
3.6 显示及指示电路------------------------------------------------------------------------------------10
3.7 按键及蜂鸣报警电路------------------------------------------------------------------------------10
3.8 单片机的选择 -------------------------------------------------------------------------------------12
4 控制系统的软件设计---------------------------------------------------------------------------------------13
4.1 主程序----------------------------------------------------------------------------------------------13
4.2 显示扫描处理子程序----------------------------------------------------------------------------14
4.3 加热控制程序-------------------------------------------------------------------------------------14
5 在调试过程中遇到的问题--------------------------------------------------------------------------------14
6 总结-----------------------------------------------------------------------------------------------------------15
致谢-----------------------------------------------------------------------------------------------------------15
参考文献-----------------------------------------------------------------------------------------------------16
附录-----------------------------------------------------------------------------------------------------------17
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