【正文】 較高的使用價值和成本較低穩(wěn)定性較好等特點(diǎn)。 使用單片機(jī)實(shí)現(xiàn)鍋爐液位控制的優(yōu)點(diǎn) 當(dāng)今，隨著計算機(jī)技術(shù)的不斷發(fā)展，微型計算機(jī)的生產(chǎn)及應(yīng)用已滲透到生產(chǎn)、生活的各個方面。在我過上海沿海等地生產(chǎn)鍋爐水位控制所需要的器材的實(shí)力比較雄厚，生產(chǎn)廠商能夠讓理論產(chǎn)物和實(shí)際產(chǎn)物能夠很好地結(jié)合，生產(chǎn)多高效實(shí)際合理的工業(yè)設(shè)備。 國內(nèi)外研究的現(xiàn)狀 目前在我國的鍋爐水位控制系統(tǒng)的研究設(shè)計生產(chǎn)中都取得了很大的成效，在各方面的發(fā)張過程中多數(shù)還只是采用理論的計算的各方面論文很多，但是能夠運(yùn)用的工業(yè)生產(chǎn)中的還很 少。采用微機(jī)控制，能對鍋爐進(jìn)行自動的檢測、自動控制等多項功能。 關(guān)鍵詞 鍋爐 ， 8051 單片機(jī) ， 模數(shù)轉(zhuǎn)換 ， 水位控制 ， 自動控制 攀枝花學(xué)院本科畢業(yè)設(shè)計（論文） ABSTRACT II ABSTRACT This design task requirement level controller design of a boiler, which in 8051 as controller, 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. The water heating boiler design is based on single chip microputer, 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 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 plete display part, use frequency converter to control the turning speed of the circulation pump, the pressure sensor is used to inspect pressure within the boiler. And by the modulus conversion signal is sent to MCU. The signal is pared 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 liquid surface, so as to realize the single chip microputer automatic control level. This design with the single chip microputer 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 parts of the work, convenient maintenance, etc. Keyword boiler， 8051 single chip microputer, modulus conversion, water level control, automatic control 攀枝花學(xué)院本科畢業(yè)設(shè)計（論文） 目錄 1 目 錄 摘 要 ........................................................................................................................................... 1 ABSTRACT ...................................................................................................................................II 1 緒論 ........................................................................................................................................... 3 課題背景 ............................................................................................................................. 3 國內(nèi)外研究的現(xiàn)狀 ............................................................................................................... 3 使用單片機(jī)實(shí)現(xiàn)鍋爐液位控制的優(yōu)點(diǎn) ................................................................................... 3 研究方案及預(yù)期結(jié)果 ............................................................................................................ 4 系統(tǒng)硬件總體方案 ..................................................................................................... 4 系統(tǒng)軟件總體方案 ..................................................................................................... 4 設(shè)計的研究進(jìn)程 ......................................................................................................... 4 2 系統(tǒng)硬件設(shè)計 ........................................................................................................................... 5 核心芯片 8051單片機(jī) .......................................................................................................... 5 液位傳感器設(shè)計 ................................................................................................................... 8 ADC0809A/D轉(zhuǎn)換 器 .............................................................................................................. 9 D／ A轉(zhuǎn)換基本原理 .................................................................................................... 9 ADC0809轉(zhuǎn)換芯片 .....................................................................................................11 鍵盤及顯示接口 ................................................................................................................. 12 自動報警電路 .................................................................................................................... 13 3 傳感器的選擇設(shè)計 ................................................................................................................. 15 液位傳感器的設(shè)計 ............................................................................................................. 15 ........................................................................................................... 15 的基本特性 ......................................................................................... 17 .............................................................................................................. 19 壓電式傳感器的設(shè)計 .......................................................................................................... 19 壓電效應(yīng)和陶瓷壓電式傳感器選取 ........................................................................... 20 壓電式傳感器的測量電路 ......................................................................................... 20 4 系統(tǒng)軟件的設(shè)計 ..................................................................................................................... 23 ..................................................................................................................... 23 水位檢測主程序 ...........................................................