基于單片機(jī)和專用芯片的多功能電量?jī)x

電氣自動(dòng)化論文編號(hào):ZD238 論文字?jǐn)?shù):15248,頁數(shù):37

目 錄

摘要………………………………………………………………………………… Ⅰ
Abstract…………………………………………………………………………… Ⅱ
第 1 章  序言 ……………………………………………………………………  2
     1.1 課題背景 ………………………………………………………………  2
 1.2 立題的目的和意義 ……………………………………………………  3
第 2 章  多功能電量?jī)x的總體分析與設(shè)計(jì) ……………………………………  4
     2.1 多功能電量?jī)x的工作原理 ……………………………………………  4
 2.2 多功能電量?jī)x的測(cè)量系統(tǒng) ……………………………………………  4
 2.3 多功能電量?jī)x的控制系統(tǒng) ……………………………………………  8
     2.3.1 8051系列單片機(jī)介紹 …………………………………………  8
     2.3.2 STC89C58RD+型單片機(jī)介紹……………………………………  11
 2.4 多功能電量?jī)x的顯示系統(tǒng) ……………………………………………  13
 2.4.1 MAX7219的內(nèi)部結(jié)構(gòu) …………………………………………   13
     2.4.2 MAX7219的操作指令 …………………………………………   13
     2.4.3 MAX7219與單片機(jī)的連接………………………………………  17
 2.5 多功能電量?jī)x的通訊系統(tǒng)……………………………………………   19
 2.6 硬件電路設(shè)計(jì)說明……………………………………………………   22
第 3 章  軟件系統(tǒng)設(shè)計(jì)…………………………………………………………   23
 3.1 C與8051 ………………………………………………………………   23
 3.2 軟件的總體設(shè)計(jì)  ……………………………………………………   23
 3.3 系統(tǒng)初始化模塊………………………………………………………   24
 3.4 顯示模塊軟件設(shè)計(jì)……………………………………………………   27
 3.5 設(shè)計(jì)參考程序…………………………………………………………   28
第 4 章  系統(tǒng)的調(diào)試安裝………………………………………………………   29
 4.2 軟件的調(diào)試……………………………………………………………   29
 4.3 硬件的調(diào)試……………………………………………………………   30
致謝 ………………………………………………………………………………   31
參考文獻(xiàn) …………………………………………………………………………   32
附錄一 ……………………………………………………………………………   33
附錄二 ……………………………………………………………………………   34

摘 要
 
 本設(shè)計(jì)是通過對(duì)單片機(jī)和專用電度表芯片（ATT7021）的學(xué)習(xí)，根據(jù)一定的設(shè)計(jì)要求，選用適當(dāng)?shù)脑�器件搭建硬件電路，利用軟件程序的編譯使其達(dá)到預(yù)期的功能。設(shè)計(jì)采用的ATT7021 是電子電度表的核心芯片，基于此芯片設(shè)計(jì)的電子式電度表具有外圍電路簡(jiǎn)單、可靠性高、線性度與穩(wěn)定性好等特點(diǎn)，適用于單相兩線制電力用戶的電能計(jì)量。主控部分采用STC89C58RD單片機(jī)，對(duì)電度表芯片的脈沖進(jìn)行計(jì)數(shù)累加同時(shí)控制顯示芯片MAX7219對(duì)其值進(jìn)行顯示。設(shè)計(jì)采用八位七段數(shù)碼管為顯示器對(duì)電量的測(cè)量值可以進(jìn)行方便的讀取。同時(shí)設(shè)計(jì)采用串口RS-232電路可以方便的與計(jì)算機(jī)連接，隨時(shí)可以對(duì)程序進(jìn)行修改調(diào)試，提高設(shè)計(jì)產(chǎn)品的性能。
 
 關(guān)鍵詞：STC89C58RD+,ATT7021,MAX7219,多功能電量?jī)x

Design of Coulombmeter of Different
Functions Base on MCU and
Special Chips
Abstract
 With the knowledge of the MCU and the electric meter of special purpose (ATT7021) and certain designing directive, this design provides a circuit of hardware with suitable parts and makes use of the translation of the programmer to achieve the anticipated function. The core chip is designed as ATT7021, base on which the electric meter of electronics is awarded the characteristics of simple peripheral circuits, high reliability, good linearity and fine stability, as well as the application of measuring the quantity of the electric energy for the users of the single-phase-two-section electric system. The central controlling part is designed as the STC89C58RD MCU, which counts the pulse and makes the chip MAX7219 to indicate it. And the LED goes to seven-section digital tube of 8 bits, which can conveniently observe the value of the electric quantity. The serial circuit RS-232 is connected to the computer to revise and debug the programmer, enhancing the performance of the product designed.
 
 Keywords: STC89C58RD, ATT7021, MAX7219, Functional electric meter