【正文】 s Day. More and more young Chinese people begin to celebrate this day in a very similar way as that in western countries. Fewer people than ever will gaze at the heavens on Saturday to pick out the two stars shining bright on either side of the Milky Way, that is, if people even know on which day Qixi falls. There are ready reminders dotted about, in the form of big ads saying Sales on Chinese Valentine39。 Festival. In this day, girls will throw a sewing needle into a bowl full of water on the night of Qixi as a test of embroidery skills. If the needle floats on top of the water instead of sinking, it proves the girl is a skilled embroiders. Single women also pray for finding a good husband in the future. And the newly married women pray to bee pregnant quickly. Tradition transformed The love story of Niulang and Zhinu, and the Qixi Festival have been handed down for generations. Yet these ancient traditions and customs are slowly dying out. Many modern Chinese, particularly youngsters, seem to know more about St Valentine39。s time for the wild fruits to ripe. The picturesque Arxan in Autumn is indeed a fairyland only exists in a dream that satisfies all your fantasies. If it rains heavily on Saturday night, some elderly Chinese will say it is because Zhinu, or the Weaving Maid, is crying on the day she met her husband Niulang, or the Cowherd, on the Milky Way. Most Chinese remember being told this romantic tragedy when they were children on Qixi, or the Seventh Night Festival, which falls on the seventh day of the seventh lunar month, which is usually in early August. This year it falls on Saturday, August 2. Folklore Story As the story goes, once there was a cowherd, Niulang, who lived with his elder brother and sisterinlaw. But she disliked and abused him, and the boy was forced to leave home with only an old cow for pany. The cow, however, was a former god who had violated imperial rules and was sent to earth in bovine form. One day the cow led Niulang to a lake where fairies took a bath on earth. Among them was Zhinu, the most beautiful fairy and a skilled seamstress. The two fell in love at first sight and were soon married. They had a son and daughter and their happy life was held up as an example for hundreds of years in China. Yet in the eyes of the Jade Emperor, the Supreme Deity in Taoism, marriage between a mortal and fairy was strictly forbidden. He ordered the heaven troop to catch Zhinu back. Niulang grew desperate when he discovered Zhinu had been taken back to heaven. Driven by Niulang39。 ll wait in the line for one hour to get a ticket, and another two hours at the site, to only see a tiny bit of the place due to the crowds. Last year, 428 million tourists traveled in China over the weeklong holiday in October. Traveling during this period is a matter that needs thorough preparation. If you are short on time to plan the uping Golden Week it may not be a bad idea to avoid some of the most crowded places for now. There is always a place so fascinating that everyone yearns for. Arxan is a place like this. The beauty of Arxan is everlasting regardless of the changing of four seasons. Bestowed by nature, its spectacular seasonal landscape and mountains are just beyond word. Arxan is a crucial destination for the remended travelling route, China Inner Mongolia Arxan — Hailar — Manzhouli. It is also the joint of the four prairies across the SinoMongolian border, where people gravitate towards the exotic atmosphere mixed with Chinese, Russian, and Mongolia elements. As a historic site for the Yitian Battle, Arxan still embodies the spirit of Genghis Khan. Walking into Arxan, you will be amazed by a kaleidoscope of geous colors all the year round the Spring azaleas blooming red in the snow, the Summer sea wavering blue in the breeze, the Autumn leaves painted in yellow covering volcanic traces, and the Winter woods shining white on the vast alpine snowscape. Hinggan League Arxan city is situated in the far eastern area of Inner Mongolia Autonomous Region. Its full name Haren Arxan means hot holy water in the Mongolian language. Arxan is a tourism city in the northern frontier with a blend of large forest, grand prairies, vast snowfield, heaven lake cluster, thermium, as well as volcanic cluster. It is a rare and unique ecotourism base filled with healthy sunshine, clean air and unspoiled green. Nestled close to the country39。我無法用準(zhǔn)確的語言來表達(dá)感謝之情，在此，我忠心地對 崔 老師表示真誠地感謝與祝福。 本 科 畢 業(yè) 設(shè) 計(jì) 第 24 頁 共 39 頁 24 致 謝 此次畢業(yè)設(shè)計(jì)每個階段的工作都得到了 指導(dǎo) 老師的悉心指導(dǎo)， 她 的盡業(yè)精神，諄諄教導(dǎo)都給我留下了深刻的印象，老師治學(xué)嚴(yán)謹(jǐn)，學(xué)識淵博，為我營造了一種良好的精神氛圍。 通過 Proteus的仿真，實(shí)現(xiàn) 了紅外遙控的編碼和解碼，以及暖風(fēng)機(jī)的一些基本功能 ，不足之處就是由于器件的限制，有些仿真未能實(shí)現(xiàn)，在現(xiàn)實(shí)生活中可以用一些集成芯片來改善這些不足。 其工作過程是 接收頭對已調(diào)信號進(jìn)行接收、放大、解調(diào)，還原成與同步格式相同的脈沖信號，最后通過解碼把脈沖信號轉(zhuǎn)換成數(shù)據(jù)，從而實(shí)現(xiàn)信號的傳輸。 其工作過程是 把待發(fā)送的數(shù)據(jù)轉(zhuǎn)換成一定格式的脈沖，然后驅(qū)動紅外發(fā)射管向外發(fā)送數(shù)據(jù)，通過發(fā)射電路對 數(shù)據(jù)進(jìn)行調(diào)制，將已調(diào)信號通過紅外發(fā)射管進(jìn)行發(fā)射； 接收系統(tǒng) 包括 51 單片機(jī)，一體化紅外接收頭 、 指示燈、數(shù)碼管顯示以及暖風(fēng)機(jī)的定時 、調(diào)溫控制等模塊，如圖 2。 發(fā)射系統(tǒng) 包括 51 單片機(jī)、操作 鍵盤、 編碼芯片 、紅外發(fā) 射電路等模塊。 鍵 1的編碼、解碼仿真圖如圖 2 24： 鍵 2的編碼、解碼仿真圖如圖 2 26： 圖 21 Proteus 設(shè)計(jì)流程圖 圖 22 Proteus 仿真與設(shè)計(jì)流程 圖 圖 23 鍵 1的編碼數(shù)據(jù) 圖 23 鍵 1的解碼顯示 圖 25鍵 2的解碼顯示 圖 25 鍵 2的編碼數(shù)據(jù) 本 科 畢 業(yè) 設(shè) 計(jì) 第 22 頁 共 39 頁 22 鍵 3的編碼、解碼仿真圖如圖 2 28： 鍵 4的編碼、解碼仿真圖如圖 2 30： 鍵 5的編、解碼仿真圖如圖 3 32： 圖 29 鍵 4的編碼數(shù)據(jù) 圖 29 鍵 4的解碼顯示 圖 31 鍵 5的編碼數(shù)據(jù) 圖 32 鍵 5的編碼數(shù)據(jù) 圖 27鍵 2的編碼數(shù)據(jù) 圖 27鍵 2的解碼顯示 本 科 畢 業(yè) 設(shè) 計(jì) 第 23 頁 共 39 頁 23 結(jié) 論 該設(shè)計(jì)以 51 單片機(jī)為核心實(shí)現(xiàn)紅外遙控的發(fā)送和接收，實(shí)現(xiàn)紅外遙控信號的編碼和解碼。 編碼部分由示波器進(jìn)行顯示，發(fā)射時先發(fā)送低位，在發(fā)送高位；解碼部分通過 8個黃色的 LED燈顯示， D0D7的順序是從低到高，燈亮表示為 1碼，燈滅表示為 0碼。 使用 Proteus軟件仿真，可以有效驗(yàn)證程序的可執(zhí)行性，并能在設(shè)計(jì)中實(shí)時作出調(diào)整，其流程圖如圖 2圖 22所示。 3） 在 ISIS平臺上把目標(biāo)代碼文件加載到單片機(jī)系統(tǒng)中仿真運(yùn)行，并實(shí)現(xiàn)系統(tǒng)的實(shí)時交互、協(xié)同仿真。 5． 2 Proteus 仿真過程 單片機(jī)仿真過程大致分以下 3步： 1） 在 ISIS平臺上進(jìn)行系統(tǒng)的電路設(shè)計(jì)、元器件選擇、接插件、 鏈接電路和電氣檢測等。通過個性化設(shè)置，可以生成印刷質(zhì)量的 BMP圖紙，可以方便地供 WORD、 PO