病房无线呼叫系统的设计.doc

病房无线呼叫系统的设计【摘要】随着人们对医院病房呼叫系统的无线传输距离和稳定性的要求越来越高，因此设计一款稳定度高，并且传输距离远的病房无线呼叫系统就很有必要了。本设计就是针对这种需要而设计的一个系统，它采用AT89S52单片机作为主控芯片，通过PT2262和PT2272来编码解码,利用MAX公司成产的MAX7044和MAX7033设计无线发射和超外差式接收电路来传递信号，呼叫信息能够通过液晶1602显示出来，并启动音乐报警电路，提醒医护人员处理。通过测试，稳定性和传输距离都达到了设计要求。【关键词】无线发射和接收编码解码音乐报警[Abstract]Asthewirelesstransmissiondistanceandstabilityofhospitalwardcallsystemishigher,itisnecessarytodesignawirelesswardcallsystem.Thisdesignusessingle-chipmicrocomputerAT89S52asthemasterchip,andusesthePT2262andPT2272asthechipofcodinganddecoding,andusesMAX7044andMAX7033designedbytheMAXcompanyasthechipofdeliveringsignalsthroughspecializedwirelesstransmittingandsuperheterodynetypeofreceivingcircuit,usesliquidcrystal1602todisplaycallsignalsandcanstartmusic,whichcanwarmhealthcareprovidertohandle.Thestabilityandthetransmissiondistancemeetthedesignrequirementsthroughthetest.[Keywords]Wirelesstransmittingandreceiving,Coding,Decoding,Musicalarm目录TOC\o"1-2"\h\z\uHYPERLINK\l"_Toc320871745"第1章绪论PAGEREF_Toc320871745\h2HYPERLINK\l"_Toc320871746"1.2课题意义PAGEREF_Toc320871746\h2HYPERLINK\l"_Toc320871747"1.3本论文的主要内容PAGEREF_Toc320871747\h3HYPERLINK\l"_Toc320871748"第2章系统概述PAGEREF_Toc320871748\h4HYPERLINK\l"_Toc320871749"2.1系统总体设计方案PAGEREF_Toc320871749\h4HYPERLINK\l"_Toc320871750"2.2发射和接收模块的设计原理PAGEREF_Toc320871750\h4HYPERLINK\l"_Toc320871751"2.3编码和解码模块的设计原理PAGEREF_Toc320871751\h7HYPERLINK\l"_Toc320871752"2.4CPU方案选择PAGEREF_Toc320871752\h9HYPERLINK\l"_Toc320871753"2.5液晶模块PAGEREF_Toc320871753\h10HYPERLINK\l"_Toc320871754"2.6温度采集模块PAGEREF_Toc320871754\h11HYPERLINK\l"_Toc320871755"2.7音乐报警模块PAGEREF_Toc320871755\h12HYPERLINK\l"_Toc320871756"本章小结PAGEREF_Toc320871756\h12HYPERLINK\l"_Toc320871757"第3章硬件设计PAGEREF_Toc320871757\h13HYPERLINK\l"_Toc320871758"3.1单片机最小系统PAGEREF_Toc320871758\h13HYPERLINK\l"_Toc320871759"3.2无线收发电路的设计PAGEREF_Toc320871759\h14HYPERLINK\l"_Toc320871760"3.3编码解码电路的设计PAGEREF_Toc320871760\h15HYPERLINK\