基于总线的病房呼叫系统论文正文

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1、摘要为提高医院的工作效率，保证病人及时得到医护人员的救助，这里设计了一种新型的医院智能呼叫系统。该系统以AT89S52单片机为控制核心、采用RS-485总线进行通讯，实现病房与护理人员间的快速、准确地呼叫及响应功能。系统由护理主机、呼叫分机、RS-485总线通讯声光报警及LCD显示等组成。直观准确的把病人的要求传达到值班室总机。主要包括硬件设计和软件设计两部分：硬件电路包括液晶显示电路、MAX485有线传输电路、声光控制电路和呼叫信息显示电路，设计所采用的主控制器是AT89S52单片机，而相应的控制功能由单片机语言编写；软件电路包括电子呼叫设计及相应的控制程序。论文涉

2、及病房呼叫系统总体原理图，液晶显示原理，RS-485总线传输原理，主控单片机等硬件设计方案及软件编程程序。同时我采用了主从分布式多机通讯，能同时监控多个病房的呼叫并进行分级处理，通过采用RS-485总线通讯系统实现远距离、多对一的呼叫。该系统具有显示床号，呼叫者重要程度显示，回复等功能。用于医院病房对护理总台的呼叫，操作简单，使用方便。这样方便了病人，同时也减轻了医院的服务压力。关键词：RS-485总线；液晶显示；串行通信；主机；从机ABSTRACTInordertoimprovetheworkefficiencyofhospitalsandmakepatientsg

3、eteffectivehelpintime，anewtypeofintelligencecallingsystemisintroducedinthisarticle．ThissystemtakestheAT89S52singlechipcomputerascontrolcoreandRS-485ascommunication，andcanrealizethefastandaccuratecommunicationbetweenthewardandthenurse．Itiscomposedofnursingmastercomputer，followcomputer，RS

4、485，theacousto-opticwarning，LCDandsoon．Thesystemcandeliverthepatients’requirementsdirectlytothedutyofficeswitchboard.Itmainlyconsiststwoparts:hardwaredesignandsoftwaredesign.Tobemorespecific,hardwaredesignincludesliquidcrystalcircuit,MAX485wiredtransmissioncircuit,theacoustic-opticscont

5、rolcircuitandcallinginformationdisplayingcircuit,withtheAT89S52SCMasitsmastercontroller。AndcorrespondingcontrollingfunctionprogrammedinMicrocomputerlanguage.Ontheotherhand,softwarecircuitincludeselectroniccallingdesigningandcorrespondingcontrollingprograms.Thepaperinvolvesgeneralschemat

6、icdiagramofCallMachineforSick-roomsystem,theliquidcrystaldisplayingprinciple,RS485bustransmissionprinciple,mastercontrollingSCMandrelatedhardwaredesigningproposalsandsoftwareprogrammingprograms,etc.Itadoptsprimary／secondarydistributivemulti-computercommunication，cansimultaneouslymonitor

7、andstagewiselytreatmultiplewards’cal1．BytheuseofRS-485，thesystemcancommunicateremotelyandrealizethecallingfunctionofmultiple-to-onecall。Thesystemhasmanyfunctions，suchasdisplayofsickroomnumber，thedegreeofcalling，reversionandsoon．Thesystemismainlyusedforcallingtoinformationdeskfr