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基于单片机的水温水位控制系统设计.doc
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基于单片机的水温水位控制系统设计.doc
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基于单片机的水温水位控制系统设计
摘 要
随着着科技的发展,各种智能化数字化的控制系统已较为普遍,而热水器,锅炉等装
置的广泛使用也相继产生了其配套的控制系统并不断地完善。然而,目前市场上的大部分
对于水温水位的控制电路性能并不是很好。因此本次设计了一种性能较好,且操作简朴的
水温水位控制系统以满足于当今的需求,该系统的主控芯片为 AT89C52 单片机、以 DS18B20
温度传感器作为温度采集、运用压力传感器采集液位,并配备了独立键盘、LCD 液晶显示
器和报警系统组成外围电路。该系统可以较为准确地测量水位水温,并设立水温与水位的
范围,若水温或水位在设定的范围之外,则自行控制通过对继电器的控制调整水温与水位
直到满足规定。通过软硬件调试完毕以上功能。
本次设计的控制系统是以单片机作为其主控芯片,因此是一种数字化的控制方式,通
过传感器配合以模数转换器将水位水温信号转换为数字信号并通过单片机解决从而完毕
对水位水温的自动控制,运用数字式的温度传感器大幅度的提高了温度测量的精度,并且
由于以单片机为控制芯片,可以通过编程方便地扩展其功能,可以满足不同的需求,因而
具有巨大的现实意义。
关键词:单片机;DS18B20;水温水位控制
Water Temperature-Level Control System Based on SCM
Abstract
With the development of science and technology, all kinds of intelligent digital control
system has been more common, and water heater, the widespread use of the device such as boiler
followed produced its form a complete set of control system and constantly improve. On the
market at present, however, for most of the water temperature of water level control circuit
performance is not very good. Therefore this design a good performance, and simple operation
of the water level control system to meet today's requirements, the system of the main control
chip as the AT89C52 single chip microcomputer and the DS18B20 temperature sensor as
temperature sampling, the use of pressure sensor level, and equipped with independent keyboard,
LCD liquid crystal display and alarm system of the peripheral circuit. Measure water
temperature, the system can accurately and set the range of water temperature and water level,
water temperature or water level is outside the scope of setting, itself through control of the relay
control to adjust water temperature and water level until they meet the requirements. The above
function through the software and hardware debugging.
The design of control system based on single chip microcomputer as its main control chip,
so it is a kind of digital control mode, through the sensor to cooperate to AD converter converts
water temperature signal to digital signal by single chip to complete the automatic control of the
water temperature, using digital temperature sensor greatly enhances the precision of
temperature measurement, and because the with the single chip processor as the control chip, and
can be programmed easily extend its function, can satisfy the different demand, and thus has
great practical significance.
Keywords: singlechip; water level’s examination; water temperature’s examination
目 录
摘 要 ..........................................................................................................................................I
Abstract ...........................................................................................................................................II
第 1 章 绪论...............................................................................................................................- 1 -
1.1 选题的意义 .......................................................................................................................- 1 -
1.2 水温水位的控制现状 .......................................................................................................- 1 -
1.3 课题任务 ...........................................................................................................................- 2 -
第 2 章 系统设计方案.............................................................................................................- 3 -
2.1 设计原理 ...........................................................................................................................- 3 -
2.1.1 系统原理.....................................................................................................................- 3 -
2.1.2 子系统工作原理.........................................................................................................- 3 -
2.2 设计方案 ...........................................................................................................................- 4 -
2.2.1 系统设计方案的选择.................................................................................................- 4 -
2.2.2 各部件控制系统方案.................................................................................................- 5 -
第 3 章 系统硬件设计.............................................................................................................- 7 -
3.1 系统总体设计 ...................................................................................................................- 7 -
3.2 各单元电路设计 ...............................................................................................................- 8 -
3.2.1 控制单元设计.............................................................................................................- 8 -
3.2.2 显示单元设计...........................................................................................................- 11 -
3.2.3 检测单元设计...........................................................................................................- 14 -
第 4 章 系统软件设计.............................................................................................................- 21 -
4.1 主程序设计 .....................................................................................................................- 21 -
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