基于單片機(jī)的智能電表設(shè)計

測控論文編號:CK110   論文字?jǐn)?shù):29991,頁數(shù):64

目 錄
中文摘要...................................................................II
英文摘要..................................................................III
第1章 緒論.........................................................1
 1.1電能表行業(yè)發(fā)展現(xiàn)狀及前景分析..........................................1
    1.2電能表行業(yè)發(fā)展?fàn)顩r及特征..............................................2
           1.3電能表的發(fā)展趨勢及現(xiàn)..................................................3
    1.4電能表的分類..........................................................6
    1.5課題的理論意義和實際應(yīng)用價值..........................................9
    1.6課題研究的主要內(nèi)容....................................................9
第2章 電能計量和信號處理理論............................................10
 2.1電能計且分析.........................................................10
  2.2模數(shù)轉(zhuǎn)換.............................................................14
           2.3數(shù)字濾波.............................................................19
第3章 電子式電能表的設(shè)計................................................22
    3.1 電能表總體設(shè)計方案框圖...............................................22
    3.2控制芯片P1Cl6F877....................................................23
 3.2.1 核心區(qū)域和外圍模塊區(qū)域.........................................25
 3.3電能計量模塊..........................................................26
 3.3.1基本原理........................................................26
 3.3.2芯片功能引腳...................................................30
    3.4電源模塊.............................................................32
 3.4.1電源端的干擾防護(hù)...............................................32
 3.5電壓電流采樣模塊.....................................................33
 3.6時鐘模塊.............................................................34
 3.7數(shù)據(jù)存儲模塊.........................................................35
 3.8RS-485通信模塊.......................................................36
 3.9紅外通信模塊.........................................................38
 3.10看門狗電路..........................................................40
 3.11LCD顯示電路.........................................................42
第4章 電子式智能電能表的軟件設(shè)計..................................44
 4.1主程序...............................................................44
 4.2動態(tài)自檢程序.........................................................44
 4.3電能脈沖采集程序.....................................................45
 4.4數(shù)據(jù)存儲程序.........................................................47
 4.5通訊中斷子程序.......................................................49
第五章 總結(jié)........................................................53
致 謝.......................................................................54
參考文獻(xiàn)...................................................................55
附錄 硬件模塊電路原理圖............................................57

摘 要隨著經(jīng)濟(jì)的迅速發(fā)展，用電量日益增加，為電網(wǎng)的穩(wěn)定運行帶來了諸多不良。國家采取多費率用電政策，以消峰填谷，平衡用電。復(fù)費率電能表己經(jīng)模取代了單一費率電能表。隨著單片機(jī)技術(shù)的日益發(fā)展，以單片機(jī)為主控的電子式電能表的生產(chǎn)已成規(guī)模。但是價格低廉、運行穩(wěn)定、可靠性高、擾能力強(qiáng)的電子式電能表還有待開發(fā)。本文首先綜述了多功能電子式電能表的發(fā)展現(xiàn)狀及電能測量的基本，重點對ΣA/D轉(zhuǎn)換原理進(jìn)行分析。論文在對電能計量和數(shù)字信號處理理論研究的基礎(chǔ)上，以美國ADI公司生ADE7755為電能計量芯片，以PIC16F877為主要控制芯片，利用單片機(jī)技設(shè)計開發(fā)了一款單相復(fù)費率智能電子式電能表。硬件外圍電路采用模塊化。其中電壓電流采樣模塊實現(xiàn)了將電網(wǎng)中的不可直接測量的大電壓大電流成為可以用來處理測量的小電壓小電流。電源模塊為整個智能電表提供了的電源。數(shù)據(jù)存儲模塊，紅外通信模塊和RS485通信模塊的設(shè)計完成了電息的及時存儲和交換。LCD模塊為用戶提供了清晰，實時的電量信息。軟件啟動前的動態(tài)自檢程序，計量電量的電能脈沖采集程序，數(shù)據(jù)信息處理和的數(shù)據(jù)存儲程序，通訊中斷子程序。在單片機(jī)的核心控制下，實現(xiàn)了電子能表電能分時段計量、數(shù)據(jù)通信等功能。關(guān)鍵詞:電子式電能表，ADE7755，電能計量，信號處理

ABSTRACTWith the development of economy and the increasement of the electrical quantity, the running of the grid is threaten heavily. Countries to take multi-rate electricity policy to the peak and valley filling, balanced power. Multi-rate watt-hour meter has been replaced by a single-mode rate meter. With the increasing development of single chip technology based on single chip main control of the Electronic Energy Meter scale of production has become. However, low-cost, stable operation, high reliability and interference ability of the electronic power meters have to be developed.
    This paper reviews the multi-function electronic energy meter energy measurement situation and the development of basic, focusing on the ΣA / D conversion principle for analysis. Articles in the energy measurement and digital signal processing theory, based on the United States for the ADI Corporation Health ADE7755 energy metering chips to the main control chip PIC16F877, using SCM technology designed and developed a single-phase multi-rate electronic energy smart Table. Modular hardware peripheral circuits voltage and current sampling module that will power can not be directly measured in a large voltage and high current can be used to deal with a small voltage and small current measurement. The source module provides the whole system stable power. Data storage module, infrared communication module and RS485 module can storage and exchange the power information. LCD module provides users with clear and real-time energy information. Software includes dynamic checking module, power pulse collection module, data storing and exchanging module, interrupted Communication module. Under the control of the single chip PIC16F877, the whole system can measure the electrical quantity in different periods of time and finishes the data exchanging.Key Words: electronic Watt-hour Meter, ADE7755, energy measurement, signal processing