倉庫溫濕度檢測系統(tǒng)設(shè)計-畢業(yè)論文

1、I倉庫溫濕度檢測系統(tǒng)設(shè)計倉庫溫濕度檢測系統(tǒng)設(shè)計摘要本設(shè)計使用STC89C52單片機(jī)作為主控制模塊，利用簡單的外圍電路來驅(qū)動1Wire總線利用1Wire總線協(xié)議實(shí)現(xiàn)了多點(diǎn)溫度和濕度的精確測量。利用STC89C52單片機(jī)本身強(qiáng)大的功能和內(nèi)部RAM資源，可以很方便的實(shí)現(xiàn)單片機(jī)與PC機(jī)間的數(shù)據(jù)傳輸，并能利用軟件方便的邏輯判斷實(shí)現(xiàn)了1Wire總線的ROM搜索實(shí)現(xiàn)了測溫器件18B20的枚舉，實(shí)現(xiàn)了無人干預(yù)的測溫點(diǎn)的動態(tài)裁剪，所以本設(shè)計具有很強(qiáng)的現(xiàn)實(shí)

2、應(yīng)用性。另外，本系統(tǒng)的濕度檢測沒有完成。本文從1Wire總線的原理入手，詳細(xì)闡述了1Wire總線的ROM搜索過程，以及硬件電路的設(shè)計、計算和軟件的算法。關(guān)鍵詞：DS18B20；單片機(jī)MCU；串行傳輸SerialDataTransfer；單總線1wireinterfaceIII目錄摘要..............................................................................

3、..........................................................IAbstract..................................................................................................................................II目錄...................

4、...............................................................................................................III第1章緒論.....................................................................................................

5、.................11.1選題背景......................................................................................................................11.2設(shè)計過程及工藝要求................................................................

6、..................................21.2.1基本功能................................................................................................................21.2.2主要技術(shù)參數(shù)....................................................

7、....................................................2第2章系統(tǒng)總體設(shè)計........................................................................................................32.1溫度傳感器的選擇..........................................

8、............................................................32.2信號采集......................................................................................................................42.2.1DS18B20基本知識.................

9、..............................................................................42.2.2DS18B20產(chǎn)品的特點(diǎn)...........................................................................................42.2.3DS18B20的引腳介紹...............

10、............................................................................42.3信號分析與處理..........................................................................................................52.3.1單總線的實(shí)現(xiàn)...............

11、.........................................................................................52.3.2DS18B20的使用...................................................................................................72.3.3DS18B20的應(yīng)用

12、電路.........................................................................................112.3.4單片機(jī)89C52......................................................................................................142.3.5MAX23

13、2電平轉(zhuǎn)換芯片特點(diǎn).............................................................................182.3.6單片機(jī)與PC間通信接口電路設(shè)計...................................................................202.3.7過限指示..................................

14、............................................................................20第3章軟件設(shè)計................................................................................................................223.11Wire總線協(xié)議處理.......

15、.........................................................................................223.21WireCRC校驗(yàn)處理..............................................................................................283.31Wire器件的ROM搜索..