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1、摘 要本设计任务要求设计一种锅炉液位控制器，它以 8051 作为控制器，通过8051 单片机，压力传感器和模数转换器等硬件系统和软件设计方法实现具有液位检测报警和控制双重功能，同时也具有压力报警和显示控制的功能,并对液位和压力值进行显示。本设计是基于单片机的水暖锅炉控制，在设计中主要有水位检测、温度检测、压力检测、按键控制、水位控制、显示部分、故障报警等几部分组成来实现供暖控制。主要用水位传感器检测水位，用光纤温度传感器来检测水温，用六个控制按键来实现按健控制，用三位 7 段 LED 显示器来完成显示部分，用变频器来控制循环泵的转速，用压力传感器检测锅炉内部压力。并且通过模数转换把这些信号送入
2、单片机中。把这些信号与单片机中内部设定的值相比，以判断单片机是否需要进行相应的操作，即是否需要开启补水泵，来实现对液面的控制，从而实现单片机自动控制液面的目的。本设计用单片机控制易于实现锅炉液位、温度和压力的控制,而且有造价低、程序易于调试、一部分出现故障不会影响其他部分的工作、维修方便、等优点。关键词关键词 锅炉，8051 单片机， 模数转换，水位控制，自动控制攀枝花学院本科毕业设计（论文） ABSTRACT ABSTRACTThis design task requirement level controller design of a boiler, which in 8051 as c
3、ontroller, through 8051 MCU, pressure sensor and the hardware system and software design methods, such as implementation of adc has a dual function, liquid level detection alarm and control also has the function of pressure alarm and display control, and to show the liquid level and pressure value.
4、The water heating boiler design is based on single chip microcomputer, are mainly in the design water level detection, temperature detection, pressure testing, button control, water level control and display part, fault alarm and so on several parts to achieve heating control. Mainly use groundwater
5、 level sensors, optical fiber temperature sensor is used to detect temperature, press with six control keys to achieve the healthy controls, with three 7 segment LED display to complete display part, use frequency converter to control the turning speed of the circulation pump, the pressure sensor is
6、 used to inspect pressure within the boiler. And by the modulus conversion signal is sent to MCU. The signal is compared with the internal setting values in the MCU, MCU on judgment whether to need to carry on the corresponding operation, whether it need to open the pump, to achieve control of the l
7、iquid surface, so as to realize the single chip microcomputer automatic control level. This design with the single chip microcomputer control is easy to realize the boiler liquid level, temperature and pressure control, and has low cost, part program is easy to debug, failure will not affect other p
8、arts of the work, convenient maintenance, etc. Keyword boiler，8051 single chip microcomputer, modulus conversion, water level control, automatic control 攀枝花学院本科毕业设计（论文） 目 录 0目 录摘摘 要要.IABSTRACT.II1 1 绪论绪论.31.11.1 课题背景课题背景.31.21.2 国内外研究的现状国内外研究的现状.31.31.3 使用单片机实现锅炉液位控制的优点使用单片机实现锅炉液位控制的优点.31.41.4 研究方案及预期结果研究方案及预期结果.41.4.1 系统硬件总体方案.41.4.2 系统软件总体方案.41.4.3 设计的研究进程.42 2 系统硬件设计系统硬件设计.52.12.1 核心芯片核心芯片 80518051 单片机单片机.52.22.2 液位传感器设计液位传感器设计.82.32.3 ADC0809A/DADC0809A/D 转换器转换器.92.3.1 DA 转换基本原理.92.3.2 ADC0809 转换芯片.112.42.4 键盘及显示接口键盘及显示接口.122.52.5 自动报警电路自动报警电路.133 3 传感器的选择设计传感器的选择设计.
