文档介绍：摘要
临床呼叫求助装置是传送临床信息的重要手段,关系病员安危,传统的有线呼叫系统历来受到各大医院的普遍重视。如果采用无线传输,会节约布线和改造线路的资金,为医院节约成本,并且及时、准确、可靠,简便可行。本设计是一种病房无线呼叫系统,采用无线编解码传输方式,避免了传统的有线呼叫系统布线麻烦和改建麻烦的问题。所设计的病区无线呼叫系统主要分为发射和接收两大部分。其中系统有九个呼叫通道,可供九个床位或病房使用,以数据编解码芯片PT2262和PT2272为核心,采用无线收发模块进行传输,其模块工作频率为315MHZ,接受方式为超再生,在护士站由LED数码管显示呼叫者的编号,并有声音提示。其中利用NE555构成单稳态触发电路控制数码管显示和声音提示的时间,护士还可以通过确认按纽立即停止显示和提示,对于加强护士站与病房的联系,提高护理水平有很大帮助。本次设计完成了各项指标,而且在要求传输距离20米的基础上,实现了40米的传输,接收端反应灵敏稳定。
关键词:无线;编码;解码;数码管;编码译码器;
Abstract
Design of this area is a wireless call system that uses wireless transmission codec, to avoid the traditional cable system, call routing and trouble into trouble. The design of the wireless unit to call the main system is divided into two parts, transmitting and receiving. Of which there are four call-channel system for the four ward beds or use the data to codec chip PT2262 and PT2272 at the core, used to send and receive wireless transmission module, the module operates at 315MHZ, as a way to accept Chao Zaisheng, nurses By the LED digital display of caller ID, and voice prompts. NE555 use of which constitutes a single steady-state control circuit to trigger a digital display and voice prompts the time, nurses can also confirm button and prompted an immediate end to show that is intended to enhance the nurse's station wards with ties to raise the level of care has been inspired by them. pleted design of indicators, and the requirements in the transmission distance of 20 meters on the basis of the achievement of a 40-meter transmission, the receiving end responsive stability. This design can be applied not only to call for medical systems, and can be applied to a large car park management, hotel room on the platform of the total calls, such as teaching question in the field of wireless remote control.
Keywords: wireless; coding; decoding; digital tube; coder-decoder
目录
第一章绪论 1
无线呼叫系统概论 1
医院病房无线呼叫系统 1
1
2
第二章电路的设计 3
设计的要求与数据 3
方案讨论 4
4