病房無線呼叫系統(tǒng)

電子機(jī)電論文編號:JD939   論文字?jǐn)?shù):16069,頁數(shù):42

目  錄
摘  要 I
Abstract II
目  錄 III
第1章  緒論 1
 1.1  課題背景 1
 1.2  課題研究的目的與意義 2
 1.3  課題設(shè)計指標(biāo) 2
第二章  方案設(shè)計 3
 2.1  總方案設(shè)計 3
 2.1.1  設(shè)計思路 3
 2.1.2  方案論證與比較 3
 2.2  本章小結(jié) 4
第三章  整機(jī)電路設(shè)計 5
 3.1  系統(tǒng)原理框圖 5
 3.2  電路基本組成 5
 3.2.1  無線呼叫發(fā)射電路 5
 3.2.2  無線呼叫接收電路 7
 3.3  本章小結(jié) 7
第四章  單元電路設(shè)計 9
 4.1  電路工作原理 9
 4.2  二進(jìn)制編碼設(shè)計 10
 4.3  數(shù)據(jù)編碼解碼 11
 4.4  無線收發(fā)模塊 16
 4.4.1  無線發(fā)射模塊 17
 4.4.2  無線接收模塊 18
 4.5  控制部分 19
 4.5.1  NE555定時器 19
 4.5.2  單穩(wěn)態(tài)電路 20
 4.6  數(shù)字顯示部分 23
 4.6.1  床位顯示譯碼器 23
 4.6.2  顯示部分電路連接 25
 4.7  本章小結(jié) 25
第五章  系統(tǒng)的調(diào)試與檢測 26
 5.1  系統(tǒng)的調(diào)試 26
 5.2  技術(shù)指標(biāo)的測試 26
 5.3  本章小結(jié) 26
結(jié)論 27
致謝 28
參考文獻(xiàn) 29
附錄1  譯文 30
附錄2  外文參考資料 32
附錄3  元件清單 37

摘  要
 本設(shè)計是一種病區(qū)無線呼叫系統(tǒng)，采用無線編解碼傳輸方式,避免了傳統(tǒng)的有線呼叫系統(tǒng)布線麻煩和改建麻煩的問題。所設(shè)計的病區(qū)無線呼叫系統(tǒng)主要分為發(fā)射和接收兩大部分。其中系統(tǒng)有九個呼叫通道，可供九個床位或病房使用，以數(shù)據(jù)編解碼芯片PT2262和PT2272為核心，采用無線收發(fā)模塊進(jìn)行傳輸，其模塊工作頻率為315MHZ，接受方式為超再生，在護(hù)士站由LED數(shù)碼管顯示呼叫者的編號，并有聲音提示。其中利用NE555構(gòu)成單穩(wěn)態(tài)觸發(fā)電路控制數(shù)碼管顯示和聲音提示的時間，護(hù)士還可以通過確認(rèn)按紐立即停止顯示和提示，對于加強(qiáng)護(hù)士站與病房的聯(lián)系，提高護(hù)理水平有很大幫助。本次設(shè)計完成了各項指標(biāo)，而且在要求傳輸距離20米的基礎(chǔ)上，實現(xiàn)了40米的傳輸，接收端反應(yīng)靈敏穩(wěn)定。本設(shè)計不僅可以應(yīng)用于醫(yī)用呼叫系統(tǒng)，而且可以應(yīng)用于大型停車場管理、酒店客房對總臺的呼叫、教學(xué)提問搶答等無線遙控領(lǐng)域。
 
關(guān)鍵詞：無線；編碼；解碼 

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 nine call-channel system for the nine 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. The completed 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; decoder