摘要：当前，随着轨道交通的发展，车载热水器在客运列车中的应用也在变革，从最开始的锅炉热水器到现在广泛使用的电热水器。与传统的热水器相比较，即热式电热水器可为人们带来更为惬意、轻松的旅程。车载即热式电热水器智能化的简化操作，使用效率的明显提高，节约能源，提高使用安全性。在生活、工作节奏越来越快的今天，可以为人们减少旅途繁琐、提高效率、节约时间。本文采用STC89C52单片机作为控制器，使用C语言编写程序,设计了一款即热式电热水器。使用按键键盘设定温度，温度可以精确到0.1摄氏度，并使用LED灯显示，能够精确提供用户所需温度的温水。采用DS18B20采集温度，使用LED灯显示，精确的显示出采集的水温。当所需温度高于当前采集的水温时，使用继电器控制外接加热源，当所需温度低于当前采集的水温时，继电器断开不加热。当所需温度高于采集温度时，继电器吸合开始加热。基本实现了智能控制功能。35583
毕业论文关键词： 轨道交通；热水器；18B20；STC89C51
The design of vehicle electric water heater based on C51 MCU
Abstract：At present, with the development of rail transportation, application of water heater in the passenger train in the reform, the electric water heater water heater boiler from the beginning to the present widely used. Compared with the traditional water heater, the water heater can bring people more comfortable, easy journey. The vehicle electric hot water heater intelligent simplify the operation, improve efficiency, save energy, improve safety. In life, the increasingly rapid pace of today, people can reduce the tedious journey, improve efficiency, save time.This paper uses STC89C52 microcontroller as the controller, the use of C programming language, designed a electric hot water heater.Use the keyboard to set the temperature, the temperature can be accurate to 0.1 degrees Celsius, and the use of LED lights display, can accurately provide the required temperature of warm water. The DS18B20 collection temperature, the use of LED lights display, display the temperature precise acquisition. When the required temperature is higher than the acquisition of temperature, use the relay to control the external heating source, when the required temperature is lower than the current collecting water, relay off without heating. When the required temperature is higher than the acquisition of temperature, relay starts heating. The basic realization of the intelligent control function.
KeyWords：Rail transit；water heater；18B20；STC89C52
目录
1  绪论    3
2  设计内容及性能指标    9
3  系统方案比较、设计与论证    9
3.1  主控制器模块    9
3.2  温度测量    10
3.3  设置温度    11
3.4  显示模块    11
3.5  电源选取    11
4  系统器件选择    12
4.1  温度传感器的选择    12
4.2  STC89C51单片机    13
4.3  电源、自锁开关    13
4.4  继电器    14
4.5  其他硬件    14
5  硬件实现及单元电路设计    15
5.1  主控制模块    15
5.2  显示模块电路    15
5.3  数码管显示驱动电路    16
5.4  温度传感器(DS18B20)电路    16
5.4.1  DS18B20基本介绍    16
5.4.2  DS18B20控制方法    17
5.4.3  DS18B20供电方式    17
5.5  继电器加热控制电路    17
6  系统软件设计    19 STC89C52单片机车载即热式电热水器设计+电路图+程序:http://www.youerw.com/zidonghua/lunwen_33607.html