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ll be traveling fast, so despite the distance, it will not be like diving 鹽城工學(xué)院新校區(qū)安全防范系統(tǒng)設(shè)計(此處改為設(shè)計課題名稱) 28 into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jump When he jumps, he is expected to reach the speed of sound 690 mph (1,110 kph) in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him pletely. If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。 Have declared the end of the encounter that haven39。那些曾經(jīng)所謂的非做不可,只是青蔥年華里自己給自己注射的一支強(qiáng)心劑,或者說,是自以為是的精神寄托罷了。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual. 一個人的時候,自己的想法總是特別地清晰。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。 The end of our life, and can meet many things really do? 而窮盡我們的一生,又能遇到多少事情是真正地非做不可? During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it. 一字開頭的年齡已經(jīng)到了尾聲。s 21 win. Michel Platini, president of European football39。s 鹽城工學(xué)院新校區(qū)安全防范系統(tǒng)設(shè)計(此處改為設(shè)計課題名稱) 26 antiracism taskforce, is in London for the Football Association39。t agree with the disciplinary action your employer has taken against you ? your employer dismisses you and you think that you have been dismissed unfairly. For more information about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。 if (offset == 8) { offset = 0。 if (++offset == 8) { offset = 0。 i = Current_Level * 8 + r + offset。 if (P1 == 0xEF) Dest_Level = 1。 Current_Level==Dest_Level) { if (P1 == 0xFE) Dest_Level = 5。 while(1)。 TH0 = 4000/256。 // //主程序 // void main() { P3 = 0x80。最后,我要說聲:謝謝張 老師,您辛苦啦! 鹽城工學(xué)院本科生畢業(yè)設(shè)計說明書 ( 2021) 19 附 錄 附錄 1: 基于單片機(jī)的電梯智能 控制 系統(tǒng)的 程序清單 附錄 2: 基于單片機(jī)的電梯智能 控制 系統(tǒng)的 設(shè)計圖紙 附錄 3: 基于單片機(jī)的電梯智能 控制 系統(tǒng)的 元器件目錄表 鹽城工學(xué)院新校區(qū)安全防范系統(tǒng)設(shè)計(此處改為設(shè)計課題名稱) 20 附錄 1:程序清單 附錄 基于單片機(jī)的電梯智能控制系統(tǒng)的 程序清單 include //52 系列單片機(jī)頭文件 include define uchar unsigned char define uint unsigned int uchar code Table_OF_Digits[]= { 0x00,0x3C,0x66,0x42,0x42,0x66,0x3C,0x00,//0 0x00,0x08,0x38,0x08,0x08,0x08,0x3E,0x00,//1 0x00,0x3C,0x04,0x04,0x3C,0x20,0x3C,0x00,//2 0x00,0x3C,0x04,0x3C,0x04,0x04,0x3C,0x00,//3 0x00,0x20,0x28,0x28,0x3C,0x08,0x08,0x00,//4 0x00,0x3C,0x20,0x20,0x3C,0x04,0x3C,0x00,//5 0x00,0x20,0x20,0x20,0x3C,0x24,0x3C,0x00,//6 0x00,0x3C,0x04,0x04,0x04,0x04,0x04,0x00//7 }。 在此,我非常感謝導(dǎo)師張?zhí)m紅教授在我大學(xué)的最后學(xué)習(xí)階段給自己的指導(dǎo)。 由于本人水平有限,本次設(shè)計還存在一些不足之處,請 評閱與答辯的 各位老師批評 指正。可以按照乘客的要求,將乘客送到要去的目的層 。用仿真器運(yùn)行正常后,再用燒寫器將程序燒到AT89C51 單片機(jī)中,進(jìn)行了脫機(jī)調(diào)試。 鹽城工學(xué)院本科生畢業(yè)設(shè)計說明書 ( 2021) 15 硬件調(diào)試 靜態(tài)檢查 根據(jù)硬件電路圖核對了元器件的型號、極性 , 安裝 是否 正確 , 檢查硬件電路連線是否與電路 原理 圖一致 , 檢查電路元器件是否都已經(jīng)連接好,用萬用表一一測試。這里只是兩個樓層申請時的討論。同時進(jìn)行相應(yīng)的功能鍵判斷,從而實現(xiàn)特殊功能。如圖 210。 P0 口與 74LS245 輸入端相連, E 端接地,保證數(shù)據(jù)線暢通。 74LS245 還具有雙向三態(tài)功能,既可以輸出,也可以輸入數(shù)據(jù)。使用片內(nèi)振蕩器時,連接外部石英晶體和微調(diào)電容。需要注意的是:如果加密位 LBI 被編程,復(fù)位時內(nèi)部會鎖存 EA 端狀態(tài)。 PSEN:程序儲存允許輸出是外部程序存儲器的讀選通信號,當(dāng) AT89C51 由外部程序存儲器讀取指令時,每個機(jī)器周期兩次 PSEN 有效,即輸出兩個脈沖。要注意的是:每當(dāng)訪問外部數(shù)據(jù)存儲器時將跳過一個 ALE脈沖時,閃爍存儲器編程時,這個引腳還用于輸入編程脈沖。 RST:復(fù)位輸入。閃爍編程或校驗時, P2 口接收高位地址和其它控制信號。對端口寫“ 1”,通過內(nèi)部的電阻把端口拉到高電平,此時,可作為輸入口。對端口寫“ 1”,通過內(nèi)部的電阻把端口拉到高電平,此時可作為輸入口。當(dāng)“ 1”被寫入 P0口時,每個管腳都能夠作為高阻抗輸入端。掉電方式保存隨機(jī)存取數(shù)據(jù)存儲器中的內(nèi)容,但震蕩器停止工作并禁止其它所有部件的工作直到下一個復(fù)位。片內(nèi)含有 8位中央處理器和閃爍存儲單元,有較強(qiáng)的功能的 AT89C51 單片機(jī)能夠被應(yīng)用到控制領(lǐng)域中。 鹽城工學(xué)院本科生畢業(yè)設(shè)計說明書 ( 2021) 7 電源電路 電源電路如圖 26 所示。 P0 口用于連接鎖存器 74LS245,以保護(hù)單片機(jī)的輸出端口。 AT89C51 是一個低電壓,高性能 CMOS8 位單片機(jī)帶有 4K字節(jié)的可反復(fù)擦寫的程序存儲器( PENROM)。 鹽城工學(xué)院本科生畢業(yè)設(shè)計說明書 ( 2021) 3 AT89C51電 源 模 塊上 電 復(fù) 位按 鍵 電 路顯 示 模 塊鎖 存 器 圖 21 硬件結(jié)構(gòu)框圖 2. 硬件設(shè)計 基于單片機(jī) 智能控制系統(tǒng)的設(shè)計系統(tǒng)電路原理圖如下 22所示。 課題設(shè)計 內(nèi)容 本課題的主要任務(wù)是完成一個電梯系統(tǒng)的智能控制模塊,即根據(jù)每個樓層不同顧客的按鍵要求,讓電梯做出合理的判斷,正確高效的指導(dǎo)電梯完成各項載客任務(wù)。但是由于 PLC 的針對性較強(qiáng),每一臺 PLC 都是根據(jù)一個設(shè)備而設(shè)計的,所以價格比較昂貴。 Control. 鹽城工學(xué)院本科生畢業(yè)設(shè)計說明書 ( 2021) 1 目 錄 基于單片機(jī)智能控制系統(tǒng)的設(shè)計 ............................................................................................2 述 .............................................................................................................................2 課題研究背景與意義 .................................................................................................2 課題設(shè)計內(nèi)容 ...........................................................................................................2 2. 硬件設(shè)計 ..................................................