智能儀表的設(shè)計(jì)附can總線接口技術(shù)研究

1、陜西理工學(xué)院畢業(yè)設(shè)計(jì)智能儀表的設(shè)計(jì)及CAN總線接口技術(shù)研究[摘要摘要]對(duì)CAN總線接口技術(shù)進(jìn)行了研究，設(shè)計(jì)出以AT89S52為控制核心具有溫度和濕度測(cè)量功能的智能儀表。詳細(xì)分析了SJA1000內(nèi)置CAN控制器的工作原理設(shè)計(jì)了CAN總線接口電路。在溫濕度測(cè)量中采用SHT11作為溫濕度傳感器實(shí)現(xiàn)了0℃～120℃范圍內(nèi)的高精度溫度測(cè)量。實(shí)驗(yàn)表明所開(kāi)發(fā)的溫濕度智能儀表性能穩(wěn)定工作可靠具有高精度、示值穩(wěn)定性好等特點(diǎn)。[關(guān)鍵詞關(guān)鍵詞]智能儀表，溫濕

2、度測(cè)量，CAN總線，SJA1000，PCA82C250IntelligentInstrumentofDesignCanBusInterfaceTechnologyofResearchAbstract:CANBusinterfacetechnologyonastudydesignedtoAT89S52asthecontrolcenterwiththetemperaturehuitymeasuringcapabilitiesofsmartm

3、eters.DetailedanalysisofthebuiltinCANcontrollerSJA1000wkingprincipledesignaCANbusinterfacecircuit.IntemperaturehuitymeasurementastemperaturehuitysenssusingSHT11achieved0℃~120℃rangeprecisiontemperaturemeasurement.Experime

4、ntalresultsshowthatthedevelopedintelligentinstrumenttemperaturehuitystableperfmancereliablehighaccuracyexcellentstabilityIndicationKeywds:IntelligentInstrument；Temperaturehuitymeasurement；CANBus；SJA1000；PCA82C250陜西理工學(xué)院畢業(yè)

5、設(shè)計(jì)第i頁(yè)共34頁(yè)4.2.2傳感器選擇....................................115基于CAN溫濕度儀表分布式測(cè)量系統(tǒng)的硬件設(shè)計(jì).............125.1單片機(jī)AT89S52簡(jiǎn)介..................................125.2單片機(jī)應(yīng)用知識(shí).....................................135.2.1單片機(jī)中斷知識(shí).............

6、....................135.2.2單片機(jī)的定時(shí)計(jì)數(shù)器............................135.3CAN總線節(jié)點(diǎn)硬件電路及設(shè)計(jì)...........................145.3.1CAN總線控制器SJA1000介紹.....................145.3.2CAN總線收發(fā)器PCA82C250介紹...................165.3.3CAN節(jié)點(diǎn)硬件電路....

7、...........................185.4溫濕度傳感器電路設(shè)計(jì)................................195.4.1SHT11的結(jié)構(gòu)...................................195.4.2內(nèi)部命令與接口時(shí)序............................205.4.3溫度和濕度值的計(jì)算............................225.4.4溫

8、濕度測(cè)量電路設(shè)計(jì)............................235.5顯示模塊............................................245.5.1液晶顯示模塊結(jié)構(gòu)特點(diǎn)...........................245.5.2讀、寫(xiě)操作時(shí)序................................265.5.3單片機(jī)與液晶模塊電路設(shè)計(jì)......................