可調(diào)節(jié)數(shù)顯電壓源

電子信息工程論文編號(hào):DZXX209  論文字?jǐn)?shù):10824,頁數(shù):28

目錄

摘要 I
ABSTRACT II
第1章 引言 1
1.1 背景 1
1.2 意義 2
1.3研究?jī)?nèi)容 3
第2章 方案的比較與選擇 4
2.1 總體方案的選擇 4
2.2 顯示器的選擇 5
第3章 系統(tǒng)硬件設(shè)計(jì) 6
3.1 電路概述 6
3.1.1 AT89S51簡(jiǎn)介及其電路 6
3.1.2 ADC0809概述及其電路 11
3.1.3 lm317穩(wěn)壓電路概述 13
3.1.4 單片機(jī)供能電路 14
第4章 系統(tǒng)軟件設(shè)計(jì) 16
4.1 數(shù)模轉(zhuǎn)換工作流程 16
4.2顯示程序流程圖 17
第5章 系統(tǒng)測(cè)試和實(shí)物制作 18
第6章 結(jié)束語 20
致謝 21
參考文獻(xiàn) 22
附錄 源代碼 23

摘要

 電力電子設(shè)備與人們的工作、生活的密切相關(guān)，而電子設(shè)備都離不開可靠的電源。數(shù)控電源技術(shù)是一門實(shí)踐性很強(qiáng)的工程技術(shù)，服務(wù)于各行各業(yè)。當(dāng)今電源技術(shù)融合了電氣、電子、系統(tǒng)集成、控制理論、材料等諸多學(xué)科領(lǐng)域。本設(shè)計(jì)由穩(wěn)壓電路來輸出可調(diào)節(jié)的直流電壓，可用于給不同的微處理器提供工作能源，而且還可以顯示當(dāng)前電壓值，避免電壓過高燒壞元件。
 本設(shè)計(jì)通過LM317穩(wěn)壓電路進(jìn)行電源的輸出，然后通過ADC0809數(shù)模轉(zhuǎn)換，將數(shù)據(jù)傳輸?shù)絾纹瑱C(jī)上，AT89S51進(jìn)行處理，然后通過數(shù)碼管顯示出電壓值，由電位器控制電壓的調(diào)節(jié)。LM7805穩(wěn)壓電路為單片機(jī)提供工作電源。本系統(tǒng)實(shí)現(xiàn)的主要芯片：AT89S51，LM317，LM7805，ADC0809，數(shù)碼管。

關(guān)鍵詞：數(shù)模轉(zhuǎn)換，數(shù)碼管，穩(wěn)壓電路，單片機(jī)

ABSTRACT

    Power electronic equipments closely related with people’s working and living, while electronic equipment can’t be separated from a reliable power supply. The technology of Numerical Control Power Supply is a strong practical engineering, service for all walks of life. Today, the power supply technology includes electrical, electron, system integration, control theory, material and other areas. The design can bring out different voltage through the regulator circuit, using for different micro-controller, although it can show the number of voltage to protect the electronic devices.
    The output of the system produces through LM317, then doing digital-to-analog conversion by ADC0809, and transporting the date into micro-controller. The micro-controller processes the data, and shows the voltage on the numerical code tube.  It can change voltage by potentiometers. The LM7805 gives the energy to micro-controller. The main chip of this system includes AT89S51, LM317, LM7805. ADC0809 and numerical code tube.
 Keywords:  Digital-to-analog conversion, Numerical code tube, Regulator circuit, Micro-controller