【正文】 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。 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 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。在這幾天我也似乎給自己找回了一些自信，以前總覺得自己雖然即將走上社會但是始終不知道自己能為社會做些啥。 我清楚地記得在設(shè)計的一開始，因為我從來沒直接的接觸過老師 ，所以總有點害怕的感覺，再加上自己對設(shè)計的課題也像對老師那樣一樣陌生，當時的感覺真是萬般的艱難。 也許課程設(shè)計中的困難相對于以后的工作來說微不足道，但是一個好的起點就是成功的開始，我相信自己。 單片機主電路如圖 19所示： 19 圖 19 單片機主電路圖 第五章 系統(tǒng)軟件程序設(shè)計 溫度檢測中斷程序 WD: CLR EA MOV P1,00H SETB EA RET 電壓檢測子程序 DYJC1: MOV P2,00H LCALL ADC MOV A,R5 CLR C SUBB A,R2 JNC L4 SETB 00H 20 L4: RET DYJC2: MOV P2,00H LCALL ADC MOV A,R6 CLR C SUBB A,R2 JNC L5 SETB 01H L5: RET DYJC3: MOV P2,00H LCALL ADC MOV A,R7 CLR C SUBB A,R2 JNC L6 SETB 03H L6: RET ADC: CLR MOV R0,2 LCALL RDTATA MOV R1,A MOV R0,8 LCALL RDATA MOV R2,A SETB CLR RET RDATA: CLR MOV C, RLC A SETB DJNZ R0,RDATA RET 21 充電脈沖控制子程序 KCD: MOV TMOD,06H MOV TL1,9CH MOV IE,82H SETB TR1 SETB CLR WAIT1: SJMP WAIT1 CLR TR1 CPL CPL RET FCD: MOV TMOD,60H MOV TL1,34H MOV IE,88H SETB TR1 SETB CLR WAIT2: SJMP WAIT2 CLR TR1 CPL CPL RET 單片機主程序 程序流程圖 22 圖 20軟件流程圖 單片機主程序 ORG 0000H AJMP MAIN ORG 0003H AJMP WD ORG 000BH AJMP WAIT1 ORG 001BH AJMP WAIT2 ORG 0030H MAIN: MOV SP,60H SETB EX0 SETB IT0 23 SETB EA CLR 00H CLR 01H CLR 02H MOV P1,00H LCALL DYCJ1 JB 00H,L1 SETB L1: LCALL KCD LCALL DYJC2 JB 01H,L1 L2: LCALL FCD LCALL DYJC3 JB 02H,L2 L3: SETB MOV P1,00H RET 24 第六章 設(shè)計總結(jié) 課程設(shè)計終于接近尾聲， 從選題到查找資料，再到動手制作，足 足花 好幾天 的時間 ，我的課題是基于單片機電動自行車快速充電器的設(shè)計，這對很多人來說并不陌生，因為這是我們幾乎每天都能看到或者用到的，但是真正要自己設(shè)計出來卻真的感到無從下手。供給電池充電。具體分布情況見下表。電壓檢測 A/D 轉(zhuǎn)換電路如圖 17所示。即兩路光藕的輸入輸出電流之比 4645 IIII ? （ ） 因為 A/D 的輸入阻抗很高，所以 ? ?2 1 0426 6 2 5 2 21 2 1 2 1 2 9 1 0i b a tR W RV R WV I R W I R W R W V UR R R R R? ? ? ? ? ? （ ） 把 2RW 、 12R 、 10R 、 9R 的阻值代入得 ? ?26 0 05 6 .1RWV V V???? （ ） 調(diào)節(jié) 2RW ，使得采樣電路輸出的電壓為 17 /3 13VOL TAGE AIN batVU? （ ） 即把輸入電壓從 015V衰減到 05V。 圖 15 溫度檢測電路 b) 電壓檢測電路 電壓檢測電路的設(shè)計主要考慮的問題是 :在正常充電的過程中，電池端電壓 Ubat的變化范圍是 0V到 15V， 要使單片機檢測 Ubat 的變化映射到 0V到 5V的范圍內(nèi)，在測量中，需要用低壓器件去測量高壓、強電流模擬量，如果模擬量與數(shù)字量之間沒有電氣隔離，那么，高電壓、強電流很容易串入低壓器件，并將其燒毀。熱敏電阻 RT 用作溫度傳感器。 用熱敏電阻構(gòu)成的溫度檢測電路較為簡單，使用電阻分壓電路，將溫度變化引起的電阻變化轉(zhuǎn)為電壓信號，可以直接傳送給單片機處理。設(shè)整流器輸出占空比為 ，則有： VOP=(44++