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t. Baumgartner still will free fall at a speed that would cause you and me to pass out, and no parachute is guaranteed to work higher than 25,000 feet (7,620 meters). cause there 北京化工大學(xué)北方學(xué)院畢業(yè)設(shè)計(論文) 38 。ll be traveling fast, so despite the distance, it will not be like diving 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。突然想到那件藍格子襯衫;那些被折成各種各樣形狀的信紙;那段從街角深巷伊始的友誼;還有那場還沒有開始就宣告了終結(jié)的邂逅計劃 …… 那些年那些天的非做不可,終于和青春一樣,都將在我們的人生中謝幕。 Have declared the end of the encounter that haven39。 Those were broken into various shapes of stationery。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心劑,或者說,是自以為是的精神寄托罷了。也曾經(jīng)好像已經(jīng)下定了決心去做某件事,但更多 的時候是最后又打起了退堂鼓。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。 Originally, this world, can produce a chemical reaction to an event, in addition to resolutely, have to do, and time. 原來,這個世界上,對某個事件能產(chǎn)生化學(xué)反應(yīng)的,除了非做不可的堅決,還有,時間 。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。t really grow up, it seems is not so important。 北京化工大學(xué)北方學(xué)院畢業(yè)設(shè)計(論文) 36 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??傆X得自己自己似 乎應(yīng)該去做點什么,或者寫點什么。 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 actions. CSKA said they were surprised and disappointed by Toure39。s 21 win. Michel Platini, president of European football39。s Premier League match at Chelsea on Sunday. I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport. For me it39。s antiracism taskforce, is in London for the Football Association39。t charge you more than 35% of your pensation if you win the case. If you are thinking about signing up for a damagesbased agreement, you should make sure you39。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。 另外,要感謝在大學(xué)期間所有傳授我知識的老師,是你們的悉心教導(dǎo)使我有了良好的專業(yè)課知識,這也是論文得以完成的基礎(chǔ)。論文的順利完成,也離不開其它各位老師、同學(xué)和朋友的關(guān)心和幫助。 卜 老師指引 了 我論文的寫作方向和 架構(gòu),并對本論文初稿進行逐字批閱,指正出其中誤謬之處,使我有了思考的方向, 她循循善誘的教導(dǎo)和不拘一格的思路給予我無盡的啟迪, 她 嚴謹細致、一絲不茍的作風(fēng),將一直是我工作、學(xué)習(xí)中的榜樣。論文得以完成,要感謝的人實在太多了,首先要感謝 卜旭芳老師 因為論文是在 卜 老師的悉心指導(dǎo)下完成的。如今,伴隨著這篇畢業(yè)論文的最終成稿,復(fù)雜的心情煙消云散,自己甚至還有一點成就感。 該系統(tǒng) 可 根據(jù)大氣的 溫 濕度 以及光照度 來控制電動機帶動傳動輪向室內(nèi)移動或者向室外移動完成其伸縮功能,完全實現(xiàn) 收晾衣服的 自動化控制 。 信號轉(zhuǎn)換與輸送系統(tǒng)是由單片機來完成的,單片機接受到 DHT11 溫濕度傳感器的溫濕度信號后將其處理轉(zhuǎn)化為所需的穩(wěn)定電信號 。檢查 I/O 口是否有重定義和發(fā)生沖突等容易出現(xiàn)問題。 圖 JDT8052XP 仿真器連接圖 運用 JDT8052XP 仿真器在 Keil uVision4 上編和調(diào)試寫程序很方便、快捷, 現(xiàn)將各個小的子程序調(diào)好,并檢查是否有錯誤和警告的出現(xiàn)。實時監(jiān)測和顯示目標 MCU 的 TXD 引腳輸出支持 Keil 的 printf函數(shù)打印輸出具備了實時跟蹤內(nèi)部變量變化和程序輸出的功能內(nèi)部具有完善的保護電路避免了使用中由于誤操作所引起的仿真器損毀。 北京化工大學(xué)北方學(xué)院畢業(yè)設(shè)計(論文) 30 圖 電路原理圖 北京化工大學(xué)北方學(xué)院畢業(yè)設(shè)計(論文) 31 第 5 章 系統(tǒng)整體調(diào)試 按電路圖接好電路之后,就在 Keil uVision4 上編寫程序并用 JDT8052XP 仿真器作整機調(diào)試, JDT8052XP 仿真器兼容 Keil 公司 的 Kiel C51 開發(fā)環(huán)境 ,用戶能夠直 接在功能強大的集成環(huán)境下進行軟件設(shè)計和硬件調(diào)試。常閉觸 點自動斷開, V2 截止,繼電器 J7 失電,開關(guān)斷開,電機停轉(zhuǎn)。繼電器 J7得電,常開觸點閉合,控制電機的反轉(zhuǎn),晾衣架伸出,自動實現(xiàn)晾衣動作。當(dāng) 溫 濕 度傳感器干時,J1 自動斷開,使電路處于正常狀態(tài)。常閉觸點自動斷開, V1 截止,繼電器 J4 失電,開關(guān)斷開,電機停轉(zhuǎn)。 J1開關(guān)代表 溫 濕度傳感器,當(dāng)下雨時.水使 J1 導(dǎo)通,運放 U1 輸出低電平,通過 U2(555 集成電路 )單穩(wěn)觸發(fā)電路,輸出高電平,定時時間 T=,其中 RPl 用于調(diào)節(jié)定時時間, J3為行程開關(guān) (常閉觸點 ),用于控制衣架收回的幅度, U2 輸出高電平使 V1 飽和導(dǎo)通,繼電器 J4得電,常開觸點閉合,控制電機的正轉(zhuǎn),晾衣架收回,自動實現(xiàn)收衣動作。 圖 溫度檢測流程圖 系統(tǒng)復(fù)位 發(fā)匹配 ROM 指令 發(fā) 64 位 ROM 碼 發(fā)溫濕度轉(zhuǎn)換命令 系統(tǒng)復(fù)位 讀數(shù)據(jù)至內(nèi)存 發(fā)讀暫存命令 發(fā) 64 位 ROM 碼 發(fā)匹配 ROM 指令 完成轉(zhuǎn)換? 是 返回 否 北京化工大學(xué)北方學(xué)院畢業(yè)設(shè)計(論文) 28 濕度測試采用 555 轉(zhuǎn)換電路 來測試,系統(tǒng)首先通過外部定時器測出 555轉(zhuǎn)換電路的輸出頻率,根據(jù)測試頻率利用公式 計算出濕度傳感器阻抗,通過上面 DHT11 對溫度的測試,這里讀取 溫度值,查詢下表 得到當(dāng)前濕度值。單片機首先發(fā)送復(fù)位脈沖,該脈沖使信號線上的 DHT11 芯片都被復(fù)位,接著發(fā)送ROM 操作命令,使得序列號編碼匹配的 DHT11 被激活。 接口 定義系統(tǒng)應(yīng)用如下: sbit DQ=P1^7; //數(shù)據(jù)傳輸線接單片機的相應(yīng)管腳 sbit key1=P1^3; //溫濕度切換 sbit key2=P2^4; //電機正轉(zhuǎn)使衣架打開 sbit key3=P3^5; //電機反轉(zhuǎn)使衣架收回 系統(tǒng)初始化還要定系統(tǒng)中的數(shù)據(jù)變量如: bit FLAG; extern unsigned char LcdBuf[5]; INT8U LcdBuf[5]={0}; unsigned char tempL=0; //設(shè)全局變量 unsigned char tempH=1; float temperature; //w 溫濕度值保存在 temperature 里 北京化工大學(xué)北方學(xué)院畢業(yè)設(shè)計(論文) 27 第 節(jié) 溫濕度檢測 溫濕度檢測采用 DHT11 溫濕度傳感器,由于 DHT11 的單總線方式,數(shù)據(jù)的讀寫都占用同一根線,所以每一種操作都必須嚴格按照時序進行。 單片機首先發(fā)送復(fù)位脈沖,該脈沖使信號線上所有的 DHT11 芯片都被復(fù)位,接著發(fā)送 ROM 操作命令,使得序列號編碼匹配的 DHT11 被激活。 第 節(jié) 系統(tǒng)初始化 軟件系統(tǒng)設(shè)計設(shè)