【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。老師對我的悉心幫助為我打下 堅實 的 理論 基 礎(chǔ) 知 識 ，提高 個 人能力都非常有益，在此我 對 丁老 師 表示忠心的感 謝 和崇高的敬意。 致 謝 25 致 謝 首先感謝寧夏大學(xué)新華學(xué)院四年來對 我的精心培養(yǎng)，這四年是我的一段比較快樂的時光，也是人生中一段寶貴的經(jīng)歷。 基于 PLC 的飲料灌裝生產(chǎn)流水線的控制系統(tǒng)為飲料罐裝生產(chǎn)提供了極大地便利，在各種飲料罐裝生產(chǎn)行業(yè)迅猛發(fā)展。但對于大型的生產(chǎn)流水線來說，該系統(tǒng)就無法滿足其更加復(fù)雜、準(zhǔn)確、智能的控制要求。仿真調(diào)試后的控制系統(tǒng)基本上滿足以下控制要求： (1)能對空瓶進(jìn)行運(yùn)送、灌裝，灌裝量可根據(jù)空瓶大小設(shè)定；（ 2）對滿瓶進(jìn)行運(yùn)送及計數(shù)，計數(shù)值包括累計計數(shù)、單位包裝計數(shù)，單位包裝計數(shù)量可根據(jù)包裝大小設(shè)定；（ 3）能夠?qū)崿F(xiàn)手動復(fù)位。該系統(tǒng)的 設(shè)計包括硬件設(shè)計和軟件設(shè)計。 記數(shù)程序的仿真 對于 小瓶，每大包可裝 40 瓶，并且最后對所裝包數(shù)進(jìn)行記數(shù)。 在灌裝加料和上蓋時按下停止按鈕，系統(tǒng)不會馬上停止工作，而是待灌裝和上蓋工作結(jié)束后，最終停止運(yùn)轉(zhuǎn)。 21 在傳送帶運(yùn)轉(zhuǎn)時， X2X3(對應(yīng)光電傳感器 )同時上電，表示檢測到大瓶，此后灌裝加料過程為 8 秒。 裝箱選擇程序的仿真 X4 X5 X6 X7 分別對應(yīng)大包 中包 小包和散裝的按鈕，選擇不同的按鈕按下，在控制面板上會顯示出相應(yīng)的包裝。 18 數(shù)據(jù)傳送程序 設(shè)定 8 小時傳輸一次數(shù)據(jù)，將各記數(shù)器中所記數(shù)據(jù)存儲到指定的存儲器中。 16 17 閃爍報警程序 罐裝和上蓋過程中閃爍報警 記數(shù)程序 對于小瓶： 40 瓶為一大包， 30 瓶為一中包， 20 瓶為一小包；對于大瓶： 20 瓶為一大包， 15 瓶為一中包 10 瓶為一小包。 15 流水線主控程序 生產(chǎn)流水線主控電路的自動控制：系統(tǒng)通過開關(guān)設(shè)定為自動操作模式，一旦啟動，則傳送帶的驅(qū)動電機(jī)啟動并一直保持到停止開關(guān)動作或灌裝設(shè)備下的傳感器檢測到一個瓶子時停止；瓶子裝滿飲料并上蓋后，傳送帶驅(qū)動電機(jī)必須自動啟動，并保持到又檢測到一個瓶子或停止開關(guān)動作；當(dāng)瓶子定位在灌裝設(shè)備下時，停頓 1s，灌裝設(shè)備開始工作，對于大瓶灌裝 8 秒鐘，小瓶則灌裝 5 秒鐘，待灌裝過程完畢再對飲料瓶進(jìn)行上蓋，上蓋時間為 2 秒鐘。系統(tǒng)過程流程圖和順序功能圖分別如下圖 51 和圖 52 所示。在生產(chǎn)過程中可以對各計數(shù)器手動清零，系統(tǒng)每8 小時將所記數(shù)據(jù)送入指定的存儲器中，然后將記數(shù)器清零。 當(dāng)瓶子定位在灌裝設(shè)備下時，停頓 1s，灌裝設(shè)備開始工作，灌裝過程為 小瓶裝 5s 鐘 ，大瓶裝8S 鐘 ， 然后均上蓋時間為 2 秒， 灌裝 和上蓋 過程應(yīng)有報警顯示， 上蓋過程 停止并 不再顯示報警；報警方式為紅燈以 間隔閃爍 。這樣做有利于不同層次的需要。顯示燈有大包、中包、小包和散裝的顯示燈，還有上電顯示和灌裝過程顯示。如圖 44 所示。如圖 43 所示。行程開關(guān) 1 個，傳感器開關(guān) 1 個。 3M 1