【正文】 RET WR_DS18B20: ；寫數(shù)據(jù)子程序 MOV R2, 8 CLR C WR1: CLR P3. 7 MOV R3, 6 DJNZ R3, $ RRC A MOV P3. 7,C MOV R3, 25 DJNZ R3, $ SETB P3. 7 NOP DJNZ R2,WR1 SETB P3. 7 RET RD_DS18B20: ；讀數(shù)據(jù)子程序 MOV R4, 2 MOV R1, 20H READ1: 基于單片機(jī)的智能電風(fēng)扇控制系統(tǒng) 12 MOV R2, 8 READ2: CLR C SETB P3. 7 NOP NOP CLR P3. 7 NOP NOP NOP SETB P3. 7 MOV R3, 9 READ3: DJNZ R3,READ3 MOV C, P3. 7 MOV R3, 23 READ4: DJNZ R3,READ4 RRC A DJNZ R2,READ2 MOV R1,A INC R1 DJNZ R4,READ1 RET 基于單片機(jī)的智能電風(fēng)扇控制系統(tǒng) 13 電機(jī)調(diào)速與控制模塊程序流程 程序設(shè)計(jì)原理 采用雙向可控硅過零觸發(fā)方式，由單片機(jī)控制雙向可控硅的通斷，通過改變每個(gè)控制周期內(nèi)可控硅導(dǎo)通和關(guān)斷交流完整全波信號(hào)的個(gè)數(shù)來調(diào)節(jié)負(fù)載功率，進(jìn)而達(dá)到調(diào)速的目的。 現(xiàn)代人類生活中所用的幾乎每件電子和機(jī)械產(chǎn)品中都會(huì)集成有單片機(jī) 。s Shaanxi province pass through a stop on the ancient Silk Road, Gansu39。s Poly Theater. Their show, titled Ulan Muqir on the Grassland, depicted the history and development of the art troupe. Being from the region allowed me to embrace the culture of Inner Mongolia and being a member of the troupe showed me where I belonged, Nasun, the art troupe39。s own path. He urges the reader to find rectitude and lead a moral life. He professes that, only by being self reliant, as opposed to relying on the government and being dictated to by society, can one begin leading a decent and purposeful life. He avers that such a life is the only life worth living. I agree with him. This essay was written during a time of social upheaval in America, and it is rather odd that Emerson authored it, as he was a part of the upper crust of society at the time. It just so happened that he looked around him, at the indolence and the wantonness of the people in his circle。 work lives easier, but I simply could not digest the fact that that was my sole purpose in life. With no family to support, I was the sole beneficiary of my employment: the paycheck, the benefits, the incentives and the rewards were mine alone. Not much of a purpose in being selfserving, is there? While I was a student, I felt I was leading a purposeful life. Learning new things, broadening my horizons, expanding my life experiences all gave my life a zip and drive that I had not felt since being in survival mode when my kids were small. After graduating college I felt oddly deflated… but by then, China was on my horizon. 。s essay titled SelfReliance. If you39。s performers of the troupe still tour the region39。雖然只有短短的三年，但是在學(xué)校卻讓我感受到了家的溫暖，讓我對(duì)人生進(jìn)一步有了明確的目標(biāo)。 （設(shè) 1秒鐘通過波形數(shù) N=100） 中斷流程圖如圖所示： 電機(jī)控制模塊中斷響應(yīng)流程圖 基于單片機(jī)的智能電風(fēng)扇控制系統(tǒng) 14 主要程序 外中斷 INT0的部分中斷響應(yīng)程序如下： ORG 0003H INTD0: PUSH ACC PUSH PSW PUSH DPH PUSH DPL SETB MOV A, 5FH JZ TING1 DEC A MOV 5FH,A LJMP FAN2 TING1: ? FAN2: MOV A, 5BH JZ TING2 DEC A MOV 5BH, A LJMP ZONG TING2:? ZONG: MOV A, 59H JZ KAI DEC A MOV 59H, A LJMP EXIT KAI: 基于單片機(jī)的智能電風(fēng)扇控制系統(tǒng) 15 CLR JB , KAI2 KAI2: MOV A, 66H JZ EXIT1 EXIT1: MOV 5FH,5AH MOV 5BH,66H MOV 59H,100 EXIT: POP DPL POP DPH POP PSW POP ACC RETI 基于單片機(jī)的智能電風(fēng)扇控制系統(tǒng) 16 結(jié) 論 通過這次畢業(yè)設(shè)計(jì)我在很大程度上提高了自己的獨(dú)立思考能力和關(guān)于單片機(jī)知識(shí)的掌握，我們正處在節(jié)能化和智能化高速發(fā)展時(shí)代，發(fā)展單片機(jī)是未來的趨勢。單片機(jī)所用的系統(tǒng)頻率為 12MHz。給定時(shí)間內(nèi) ,負(fù)載得到的功率為 : 式中 :P 為負(fù)載得到的功率 KW 為給定時(shí)間內(nèi)可控硅導(dǎo)通的正弦波個(gè)數(shù) 。通過控制雙向可控硅的導(dǎo)通角，使輸出端電壓發(fā)生改變，從而使施加在電風(fēng)扇的輸入電壓發(fā)生改變，以調(diào)節(jié)風(fēng)扇的轉(zhuǎn)速，實(shí)現(xiàn)各檔位風(fēng)速的無級(jí)調(diào)速。 數(shù)字溫度傳 感器模塊設(shè)計(jì) 溫度傳感器可以選用 LM324A 的運(yùn)算放大器，將其設(shè)計(jì)成比例控制調(diào)節(jié)器，輸出電壓與熱敏電阻的阻值成正比，但這種方案需要多次檢測后方可使采樣精確，過程過于煩瑣。 本設(shè)計(jì)主要內(nèi)容如下： 風(fēng)速設(shè)為從高到低 5個(gè)檔位，可由用戶通過鍵盤手動(dòng)設(shè)定。 做到 降低工 作成本提高工作效率，實(shí)現(xiàn)現(xiàn)在國家所提倡的節(jié)能減排口號(hào)。通過鍵盤手動(dòng)設(shè)定，可以在一定范圍內(nèi)設(shè)置電風(fēng)扇的最低工作溫度，當(dāng)溫度低于所設(shè)置溫度時(shí)，電風(fēng)扇將 自動(dòng)關(guān)閉，當(dāng)高于此溫度時(shí)電風(fēng)扇又將重新啟動(dòng)系統(tǒng)。 設(shè)計(jì)任務(wù)和主要內(nèi)容 本設(shè)計(jì)以 MCS51 單片機(jī)為核心，通過溫度傳感器對(duì) 環(huán)境溫度進(jìn)行數(shù)據(jù)采集，從而建立一個(gè)控制系統(tǒng)，是電風(fēng)扇隨溫度的變化而自動(dòng)變換檔位，實(shí)現(xiàn)“溫度高，風(fēng)力大，溫度低，風(fēng)力弱”的性能，當(dāng)溫度低于所設(shè)置溫度時(shí)，電風(fēng)扇將自動(dòng)關(guān)閉，當(dāng)高于此溫度時(shí)電風(fēng)扇又將重新啟動(dòng)。是比較合適的方案。 部分溫度值于 DS18B20輸出的 數(shù)字量對(duì)照表 基于單片機(jī)的智能電風(fēng)扇控制系統(tǒng) 6 電機(jī)調(diào)速與控制模塊設(shè)計(jì) 電機(jī)調(diào)速是整個(gè)控制系統(tǒng)中的一個(gè)重要的方面。所設(shè)計(jì)的可控硅觸發(fā)電路原理圖， 其中 RL即為電機(jī)負(fù)載，其工作原理是 :單片機(jī)響應(yīng)用戶的參數(shù)設(shè)置 ,在 I/ O 口輸出一個(gè)高電平 ,經(jīng)反向器反向后 ,送出一個(gè)低電平 ,使 光 電 耦 合 器 導(dǎo) 通 ,同 時(shí) 觸 發(fā) 雙 向 可 控 硅 ,使工作電路導(dǎo)通工作。 基于單片機(jī)的智能電風(fēng)扇控制系統(tǒng) 9 數(shù)字溫度傳感器模塊程序流程圖 如圖所示，主機(jī)控制 DS18B20完成溫度轉(zhuǎn)換工作必須經(jīng)過三個(gè)步驟：初始化、 ROM 操作指令、存儲(chǔ)器操作指令。 2）斷服務(wù)程序，執(zhí)行中 斷服務(wù)程序時(shí)，首先保護(hù)現(xiàn)場， INT0中 斷標(biāo)志置位，禁止主程序修改工作參數(shù)，然后開始減 1計(jì)數(shù)，判斷是否關(guān)斷可控硅，最后 INT0中斷 標(biāo)志位清零，還 原初 始化數(shù)據(jù)，恢復(fù)現(xiàn)場，中斷返回。 再次感謝我的導(dǎo)師彭小軍對(duì)我論文的構(gòu)思以及內(nèi)容不厭其煩的指導(dǎo)和細(xì)心指點(diǎn)，使我在完成論文的同時(shí)也深受啟發(fā)和教育給予我很多教益。t just about sharing art with nomadic families but also about gaining inspiration for the music and dance. Ulan Muqir literally t