太阳能水位、水温即时监控系统设计.doc

清华大学2010届本科毕业设计说明书撰写人：___________日 期：___________毕业设计说明书太阳能水位、水温即时监控系统学生姓名： 学号： 学 院： 专 业： 指导教师： 2010年6月太阳能水位、水温即时监控系统摘 要：在太阳能的热利用中，用于产生热水的太阳能热水器应用广泛，它充分利用了自然能源——太阳能，节省了大量能源，这对于资源紧张的今天，具有重要意义在研究了国内外相关领域的发展趋势和现状后发现，我国太阳能热水器的智能控制程度相对较低本文综述了太阳能热水器智能控制技术的发展趋势，对通过单片机AT89C51和无线收发模块GSM对太阳能热水器水位、水温的即时控制和远程监控的工作原理及控制方法进行了深入的研究和讨论,给出了太阳能热水器水位、水温即时监控系统的原理框图和设计过程在本设计中由数据采集系统利用水温传感器和水位传感器分别采集水温、水位连续变化的模拟量信号，通过模数转换器把模拟信号转换成数字信号，送到CPU89C51中进行处理，从而实现水位、水温的显示。

然后将采集到的水位、水温的数据通过GSM无线数据传输模块发送到用户上，实现对太阳能热水器水位、水温的即时监控关键词：太阳能热水器，AT89C51，GSM无线传输，AT指令 Solar water heater water level, water temperature monitoring system timelyAbstract：Among the applications of the solar energy. Solar water heater for heating water is being extensively applied. Through exploring the energy from the nature. this technology is particularly important for today’s society to relieve the stress from lack of sources. Researched the related fields present and trends at home and abroad, we found that solar water heaters in China is relatively low level of intelligent control. This paper reviews the solar water heater intelligent control technology development status and trends, study and discussion in-depth the working principle and control methods of solar water heaters the water level, water temperature control timely and remote monitoring based the microcontroller AT89C51 and GSM wireless transceiver modules , to give out the design and theory block diagram of solar water heater water level, water temperature monitoring timely.In the design, the data acquisition system collect the succession changes in the analog signal of water temperature, water level by the temperature sensors and water level sensors, convert analog signals into digital signals through the ADC, sent it to CPU89C51 to processing, in order to achieve the water level, water temperature display. And then send the water level, water temperature data collected through GSM wireless data transmission module input to the mobile phone, make it come true that solar water heater water level, water temperature monitor and control timely.Keywords: solar water heater, AT89C51, GSM wireless, AT commands目录1 绪论.............................................................................................................................11.1太阳能热水器的发展现状........................................................................................11.2 需求分析.................................................................................................................21.3 GSM/SMS技术的发展..............................................................................................31.4 本设计的目的和意义.............................................................................................41.5 本设计的主要研究工作.........................................................................................51.6 本章小结.................................................................................................................52 系统方案设计.............................................................................................................62.1 方案功能设计...........................................................................................................62.2 方案总体设计.........................................................................................................62.3 方案设计原理.........................................................................................................72.3.1 单片机的选择.....................................................................................................72.3.2 无线通信模块的选择.......................................................................................10 短信协议...................................................................................................112.3.4 GSM模块中与SMS有关的 AT指令..................................................................132.4 本章小结...............................................................................................................143 系统硬件电路设计...................................................................................................153.1 水温测量电路设计.................................................................................................153.1.1 LM35温度传感器...............................................................................................153.1.2 A/D转换芯片ADC0832......................................................................................163.1.3 水温检测电路...................................................................................................173.2水位测量电路设计...................................................................................................183.2.1 LM型液位传感器.......................................................................。