摘 要
医用无线呼叫系统是一种采用无线编解码传输方式,由微型计算机控制的国内最先进无线的医用传呼系统。对于加强护士站与病房的联系,提高护理水平具有很大帮助。本文所设计的呼叫系统使用专用射频无线收发芯片传输,避免了传统的有线寻呼系统布线麻烦和改建麻烦的问题。使用单片机多地址编码技术,每个分机设置使用不同的地址编码,呼叫时误码率低,呼叫主机的时候互不干扰。系统容量大,扩展起来十分方便。该呼叫系统是一种采用无线编解码传输方式,使用单片机做控制器,自动储存最新呼叫的病床号码,并循环显示,历史号码使用删除键删除,在传统的呼叫系统上做了很大的改进,是的国内先进的无线的医用呼叫系统。该系统所用元件为高集成度的芯片,整个系统电路简洁、性能稳定。呼叫机的工作方式设置了省电模式,在不使用的时候自动进入省电状态,所以功耗低,大大的节约了电池的使用时间。
关键词:无线呼叫;单片机控制;地址编码;号码存储;循环显示
Abstract
Medical use wireless call-out system whether one adopt wireless compiled code transmission means, by the domestic most advanced and most wireless medical paging system that the microcomputer controlled. For strengthening nurse station and connection in the ward , improve nursing level to help greatly. Call system this text design use special-purpose wireless to receive and dispatch chip transmit radio frequency, prevent traditional wired paging systematic step line trouble and question to reconstruct trouble from. Use one-chip computer many address code technology, each extension set up and use different address codes, call-out mistiming yards of low rate , interfere each other while calling out the host computer. The systematic capacity is large, it is very convenient to expand.This call-out system use wireless compiled code transmission, use the one-chip computer to controll, store the sick bed number called out newly automatically, and circulation shows , the historical number uses and deletes the key to delete, domestic advanced wireless medical use call-out the system in whom traditional call make heavy improvement at the system.This system uses the chip of the high integrated level, the whole system circuit is succinct , performance is steady. Set up the electric mode in the province , enter the electric state of province automatically when do not use in working way of the calling out machine, so power consumption is low, the service time of the big thrift battery.
Keywords: Call-out wirelessly,Single-chip computer control,Address code,
Number storing,Circulation showing
目 录
摘要…………………………………………………………………………………Ⅰ
Abstract……………………………………………………………………………Ⅱ
第1章 绪论…………………………………………………………………………1
1.1课题意义及相关研究动态……………………………………………3
1.2课题要求……………………………………………………………………3
1.3系统主要技术性能指标……………………………………………………3
第2章 方案论证及选择……………………………………………………………4
2.1方案论证……………………………………………………………………4
2.1.1 采用有线分区响应集中控制方案……………………………………4
2.1.2 采用DTMF编码方案……………………………………………………5
2.1.3 射频元件和单片机控制方案………………………………………6
2.2 方案选择……………………………………………………………………7
第3章 系统硬件设计………………………………………………………………9
3.1系统原理框图………………………………………………………………9
3.2主要元器件介绍……………………………………………………………9
3.2.1 nRF401介绍……………………………………………………………9
3.2.2 单片机AT89C51介绍………………………………………………14
3.2.3 单片机AT89C2051介绍……………………………………………17
3.3 分机电路设计………………………………………………………………18
3.3.1 分机号码设定电路的设计……………………………………………18
3.3.2 分机nRF401与AT89C2051主连接电路的设计……………………19
3.3.3 分机天线设计…………………………………………………………20
3.3.4 分机电源设计…………………………………………………………20
3.4 主机电路设计………………………………………………………………20
3.4.1 主机nRF401与AT89C2051主连接电路的设计……………………20
3.4.2 主机电源电路的设计…………………………………………………20
3.4.3 显示电路的设计………………………………………………………22
3.4.4 键盘电路的设计………………………………………………………22
3.4.5 报警电路的设计………………………………………………………22
3.4.6 走廊显示电路的设计…………………………………………………23
3.5 系统总电路设计……………………………………………………………24
第4章 系统软件设计………………………………………………………………25
4.1通信协议设计………………………………………………………………25
4.2系统总流程图………………………………………………………………25
4.2.1 分机系统流程图设计…………………………………………………25
4.2.2 主机系统流程图设计…………………………………………………26
4.2.3 提示音子程序设计……………………………………………………27
4.2.4 显示子程序设计………………………………………………………27
4.3系统程序设计………………………………………………………………28
结论…………………………………………………………………………………30
参考文献……………………………………………………………………………31
致谢…………………………………………………………………………………31
附录A分机电路图……………………………………………………………33
附录B主机电路图……………………………………………………………34
附录 C 走廊显示电路图…………………………………………………………35
附录 D程序清单…………………………………………………………………36