摘源用于給礦燈充電的前端充電模塊；LM324N用做電壓比較器與前端充警操作的裝置。通過(guò)RS485總線(xiàn)傳輸模塊的設(shè)置，有效地避免了礦：開(kāi)關(guān)電 RS485總 蜂鳴器LM324NThisworkisbasedonAT89C52asthemaincontrolchipinminer'slampchargingrack,includingswitchingpowersupplyforthefrontendoftheminer'slampchargingchargingmodule;LM324Nvoltagecomparatorconnectedwiththefrontendchargingmodule,usedforfront-endmodulebatterycharginginformationofsignalacquisition;74ls166connectedwiththechargingsignalacquisitionmodule,isusedtocollecttheinformationispassedtothemaincontrolcircuitmodule;Dialthecodeswitchconnectedtothemaincontrolmodule,usedforsettinguptheaddressofeachminer'slampchargingrack,Transmissionmoduleisconnectedtothemaincontrolcircuitmodule,isusedtodealwithaftertheinformationtransmissiontothePCthroughtheRS485busPC;Buzzerconnectedtothemaincontrolcircuitmodule,usedforover-voltageorover-currentphenomenonoccurringinasystemforalarmoperationwhenthealarmdevice.ThroughtheRS485bustransmissionmoduleSettings,effectivelyavoidtheminer'slampframetransmissioninterferencebetweenthesmall.ThroughthealarmmoduleSettings,makethesystemovervoltageovercurrentprotectionalarmfunction.keyword：Switched-modepowersupply；AT89C52；BuzzerLM324N；74LS166；RS485Bus硬件電路包括單片機(jī)最小系統(tǒng)電路、LM324NRS485路模塊可以分為單片機(jī)最小系統(tǒng)電路、LM324N模塊、撥碼開(kāi)關(guān)模塊、RS485總線(xiàn)傳輸模塊、蜂鳴器電路模塊。3-1圖3-1AT89C523-2圖3-2戶(hù)在設(shè)計(jì)完單片機(jī)系統(tǒng)并在調(diào)試成功后在現(xiàn)場(chǎng)卻出現(xiàn)“死機(jī)、3-3圖3-3本設(shè)計(jì)中的撥碼開(kāi)關(guān)與74LS1668位移位寄存器相連。74LS166撥碼開(kāi)關(guān)電路圖如圖3-4圖3-4換接到單片機(jī)的RXD和TXD引腳，將單片機(jī)串口通信輸出的電平轉(zhuǎn)RS485RS4853-5圖3-5RS485蜂鳴器模塊的作用：電路有過(guò)壓、過(guò)流，蜂鳴器發(fā)出預(yù)設(shè)的聲蜂鳴器電路圖如圖3-6圖3-6壓的不同，LM324N74LS166傳給單片機(jī)。LEDD1，LM324N充電信 模塊如圖3-7所示圖3-7LM324N充電信息模Ckeil傳送方式設(shè)置單片機(jī)串口的工作方式單片機(jī)通過(guò)對(duì)74HC245的控制對(duì)信息模塊和撥碼開(kāi)關(guān)模塊中的74LS166。信息模塊將到的數(shù)據(jù)通過(guò)74LS166傳給單片機(jī)，單片機(jī)連同本臺(tái)礦燈架的地址碼和檢測(cè)數(shù)據(jù)一同發(fā)給電腦[6]系統(tǒng)中有四個(gè)74HC245，即:JP3、JP4、JP6、JP7每臺(tái)礦燈架都有4排礦燈，每個(gè)74HC245控制一排礦燈每一排礦燈采用串行數(shù)據(jù)傳輸，節(jié)省了空間和數(shù)量RS485PC4-174HC24574HC2454-274HC2454-3AltiumDesigner設(shè)計(jì)完電路圖后，首先在電路板上焊制了單片機(jī)最小系統(tǒng)，通過(guò)向中寫(xiě)入讓每個(gè)引腳持續(xù)規(guī)律地在1和0電位轉(zhuǎn)是程序中出現(xiàn)的問(wèn)題，因?yàn)橛卸嗯_(tái)礦燈架組成的，由一跟RS485總線(xiàn)相LM234N結(jié)本設(shè)計(jì)的硬件電路主要由單片機(jī)最小系統(tǒng)電路、LM324NLED計(jì)、延時(shí)、故障燈、打印等功能、礦燈充電次。 趙琳,王璐,閔莉.基于單片機(jī)通信傳輸系統(tǒng)設(shè)計(jì)[J].科技廣8031[J].半導(dǎo)體技術(shù).2002. STC89C52RS485《VisualC++串口通信開(kāi)發(fā)與編程實(shí)踐》周韌研、商斌，電子74LS166芯片及應(yīng)用研究》[J].企業(yè)技術(shù)開(kāi)《AltiumDesign