毕 业 论 文
论文题目 医院病房紧急呼叫系统
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摘要
本文介绍了一种以AT89S52单片机设计的医院病房无线呼叫系统。该系统由单片机系统、无线收发系统、功能开关、1602液晶显示器、以ISD4004语音芯片为主的语音系统等单元电路组成。该系统所用到的无线收发系统采用315无线收发模块的PT2262和PT2267编解码芯片，利用单片机的串行半双工通信来实现。它的核心控制器采用价格低廉，性能可靠的单片机。该系统主要工作原理是分机按键呼叫，主机声光报警，同时显示呼叫的号码，主机按键可回复。研究表明该系统使用方便、快捷、安全可靠，可应用于医院、茶庄、KTV、餐厅等领域。在市场经济体制中，尤其在服务性的行业中，更省人、省钱、省心，更能提高企业效率，提高服务形象，带来更好的经济效益，可作为电子产品进行开发研制，具有很好的推广价值。
关键词：单片机技术 无线发射和接收 无线呼叫系统 ISD4004 1602
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The Urgent Calling System In Hospital Words
Abstract
This paper introduces a SCM(single-chip microcomputer) ATMEL AT89S52 MCU as a wireless calling system in hospital wards. This system consists of SCM system, wireless transceiver system, the functional switch, 1602 LCD, and by the main of voic ISD4004 as a voice systems unit circuit etc. What the use of the system is the wireless transceiver system which invlves a wireless transceiver module 315 of the PT2262 and PT2267 codec chip, and brings about the SCM’s half-duplex communication. The core controller optionaled SCM with low price and reliable performance. The call ext press then the host sound-light alarm, display the call numbers at the same time and at last the host give a reply by press the button is the main working principle of the system. The study shows that this system has the characteristics of easy to sue, fast, safe and reliable. And it can be used some social fields such as hospital, tea house, KTV, restaurant, etc. In the market economic system, especially in the service industry, Using it that can be more saving staffs, money as well as trouble. What more it can improves the company’s efficiency, enhances the image of services, and brings economic benefits. So it can be used as electronic product to research and development, In my opinion, it has a good value of promotion.
Key word : SCM(single-chip microcomputer) Transmit and receive wireless
The Wireless Calling System ISD4004 1602
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目 录
第一章
引言??????????????????????????1
1.1 课题背景与来源?????????????????????1 1.2 课题意义??..?????????????????????2 1.3 课题设计的内容和方案??????????????????2
第二章
系统概述????????????????????????3
2.1 系统组成????????????????????????3 2.2 系统的功能介绍及操作说明????????????????4
第三章
3.1 3.2 3.3 3.4 3.5
硬件组成与设计?????????????????????5 整体电路图???????????????????????5 电源电路????????????????????????6 主控芯片单片机?????????????????????7 主机功能按键介绍????????????????????8 液晶显示器1602 ????????????????????8
3.5.1 电路设计???????????????????????8 3.5.2 LCM1602引脚及功能介绍 ????????????????9 3.6
语音电路 ???????????????????????10 3.6.1 语音电路图设计 ???????????????????10 3.6.2 ISD4004简介?????????????????????12 3.6.3 LM386????????????????????????15 3.7
无线收发模块 ?????????????????????16 3.7.1 发射板 ???????????????????????16 3.7.2 接收板 ???????????????????????17 3.7.3 编解码芯片PT2206和PT2272??????????????18
3.7.3.1 PT2262引脚及工作原理 ?????????????18 3.7.3.2 PT2272引脚及工作原理 ?????????????19
第四章
4.1 4.2 第五章 5.1 5.2
软件设计????????????????????????21 主机程序流程图 ????????????????????21 从机程序流程图 ????????????????????22 系统测试与分析?????????????????????24 系统设计过程??????????????????????24 单个模块的调试?????????????????????24
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5.3 第六章
系统测试达到的技术指标?????????????????26 结束语?????????????????????????27
参考文献 ????????????????????????????28 附录（一）????????????????????????????29 附录（二）????????????????????????????31 致谢 ????????????????????????????49
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