摘要：智能燃氣表是一種根據(jù)用戶IC卡購氣量實現(xiàn)自動計量收費，自動控制用氣的民用高技術(shù)產(chǎn)品，它具有傳統(tǒng)人工抄表收費式燃氣表無可比擬的優(yōu)越性，實現(xiàn)了燃氣收費管理系統(tǒng)的電子化，信息化和網(wǎng)絡化，智能燃氣表及其收費管理系統(tǒng)已經(jīng)呈現(xiàn)出廣闊的應用前景。
燃氣表是在常規(guī)家用模式燃氣表體上安裝智能測控系統(tǒng)而構(gòu)成的，本文詳細介紹了該測控系統(tǒng)，本文以AT89S52單片機為核心，通過流量傳感器測得的燃氣量經(jīng)過信號放大電路進行A/D 轉(zhuǎn)換，轉(zhuǎn)換后的數(shù)字信號經(jīng)過單片機處理控制微功耗電閥門，最后將燃氣的累積數(shù)、燃氣的可用數(shù)及IC卡中余額等信息通過LED顯示器模塊進行顯示，本文還對燃氣表的電源監(jiān)控系統(tǒng)、射頻卡模塊、掉電存儲系統(tǒng)、聲光報警系統(tǒng)進行了設(shè)計。
關(guān)鍵字： 單片機 燃氣表 預付費

Abstract：Intelligent gas meter is a according to user IC card gas for the realization of automatic meterage, automatic control of high technology using gas civil products, it has a traditional artificial copy meter charge type gas meter incomparable advantage and realize the charge of fuel gas management system, electronic information and network, IC card gas meter and its charge management system appears to have a broad application prospect.
Gas meter is in conventional household model gas meter installed on the body of the intelligent measurement system consists of, the article introduces the measurement and control system, this paper to AT89S52 SCM as the core, the flow sensor measurement of gas quantity after amplification circuit A/D conversion, after converting digital signal of the single chip micro control valve and will last electric power consumption of gas, the fuel gas of the cumulative number of available Numbers and IC card balance of information through the LED display module, this paper also shows the power of the gas meter of monitoring system, radio frequency card module, power lost storage system, sound and light alarm system design
Key words： Single-Chip Microcomputer Gas meter prepaid

目 錄
摘 要 ...........................................................................................I
Abstract............................................................................................II
第1章 緒 論.......................................................................................1
1.1課題研究的目的與意義.......................................................................1
1.2 IC卡燃氣表的發(fā)展現(xiàn)狀.......................................................................2
1.3 IC 卡燃氣表的發(fā)展趨勢.....................................................................3
第2章 主電路的選擇與設(shè)計.....................................................................5
2.1 整體方案論述................................................................................5
2.1.1 IC智能燃氣表可以實現(xiàn)的功能..........................................................5
2.1.2 IC 智能燃氣表的設(shè)計方案及系統(tǒng)組成.................................................5
2.1.3系統(tǒng)總體的控制過程.......................................................................6
2.2 IC卡燃氣表主要元器件選擇................................................................6
第3章 硬件系統(tǒng)的設(shè)計...........................................................................7
3.1 主控系統(tǒng)的設(shè)計...............................................................................7
3.1.1 主控芯片的介紹............................................................................7
3.1.2 主控電路...................................................................................10
3.3 射頻卡模塊..................................................................................11
3.4電源監(jiān)控系統(tǒng)................................................................................12
3.5電磁閥驅(qū)動系.................................................................................14
3.6燃氣流量傳感器...............................................................................15
3.7 A/D轉(zhuǎn)換器 ....................................................................................16
3.7.1 ADC0809概述 ..............................................................................16
3.7.2 ADC0809內(nèi)部結(jié)構(gòu).........................................................................16
3.7.3 ADC0809轉(zhuǎn)換原理.........................................................................18
3.8 燃氣泄漏報警電路...........................................................................18
3.9 聲光報警電路.................................................................................19
3.10 LED顯示系統(tǒng)................................................................................20
3.11 擴展存儲器的設(shè)計.........................................................................21
3.12 電源電路設(shè)計..............................................................................24
3.12.1電路工作原...理.........................................................................24
3.12.2電源電路調(diào)試 ...............................