本科畢業論文-基于plc的煤礦礦車防跑車系統設計定稿-wenkub

　

【正文】 。西門子 S7200 系列，是 S7 系列中最先進的超級微型 PLC，除了具有一般輸入輸出的功能外，還具有模擬量控制、定位控制等特殊功能。 ● 輔助繼電器： M,S,L 等 ；計時器： 256 點；計數器： 256 點；數據寄存器： 5 / 11 VB,VW,VD 等。 4 電氣原理圖 圖 23 防跑車 控制系統電氣原理圖 輸入端： ～ 分別為三個傳感器的檢測信號。 輸出端： 為電機正轉輸出，控制擋車欄開啟。 表 21 煤礦礦車防跑車系統 PLC 輸入 /輸出模塊對應用途 5 煤礦礦車防跑車系統 PLC 程序 經過詳細研究擋車欄的工作原理和控制要求，該系統 PLC 程序設計采用了分系統設計的思想，主要包括三個部分：位置檢測系統、擋車欄系統、監控報警系統。位置檢測系統需要完成的功能是將礦車的運行速度檢測計算出來。經過仔細的調研、分析，設計出自動開啟和關閉擋車欄動作的邏輯流程圖，如圖 25所示 圖 25 煤礦礦車防跑車系統 功能圖 在自動擋車欄控制入口處，需滿足一系列的條件才能啟動礦車，礦車開始運行進入 自動控制流程。 圖 27 礦車停止條件 8 聲光語音報警系統 圖 28 報警系統邏輯流程圖 圖 28 為報警系統流程圖，其功能是將礦車跑車后，將故障發送至監控平臺，并語音提示，減少人身設備傷亡。 參考文獻 1 陳立定 . 電氣控制與可編程序控制器的原理及應用 [M]. 北京：機械工業出版社， . 2 楊長能等．可編程控制器（ PC）基礎及應用 [M]．重慶大學出版社，1992. 3 何衍慶．可編程控制器原理及應用技巧 [M]．北京：化學工業出版社，1998. 4 王晨，賈福音等．斜井跑車保護裝置的研究現狀與發展趨勢 [J]．煤礦機械 ， 2021， 31(3). 5 陳拓其．一種新型礦車防跑車機構的設計與仿真 [J]．礦山機械，2021， 37(17)： 3840． 10 / 11 請您刪除一下內容， O(∩ _∩ )O謝謝！！！ Many people have the same mixed feelings when planning a trip during Golden Week. With heaps of time, the sevenday Chinese 請您刪除一下內容， O(∩ _∩ )O 謝謝！！！ National Day holiday could be the best occasion to enjoy a destination. However, it can also be the easiest way to ruin how you feel about a place and you may bee more fatigued after the holiday, due to battling the large crowds. During peak season, a dream about a place can turn to nightmare without careful planning, especially if you travel with children and older people. As most Chinese people will take the holiday to visit domestic tourist destinations, crowds and busy traffic are inevitable at most places. Also to be expected are increasing transport and acmodation prices, with the possibility that there will be no rooms available. It is also mon that you39。s misery, the cow told him to turn its hide into a pair of shoes after it died. The magic shoes whisked Niulang, who carried his two children in baskets strung from a shoulder pole, off on a chase after the empress. The pursuit enraged the empress, who took her hairpin and slashed it across the sky creating the Milky Way which separated husband from wife. But all was not lost as magpies, moved by their love and devotion, formed a bridge across the Milky Way to reunite the family. Even the Jade Emperor was touched, and allowed Niulang and Zhinu to meet once a year on the seventh night of the seventh month. This is how Qixi came to be. The festival can be traced back to the Han Dynasty (206 BCAD 220). Traditionally, people would look up at the sky and find a bright star in the constellation Aquila as well as the star Vega, which are identified as Niulang and Zhinu. The two stars shine on opposite sides of the Milky Way. Customs In bygone days, Qixi was not only a special day for lovers, but also for girls. It is also known as the Begging for Skills Festival or Daughters39。s Day! in shops, hotels and restaurants. But few young women will mark the festival with their boyfriends, or take part in traditional activities to pray for cleverness. A largescale of exhibition on the Silk Road opened to the public in the National Museum on Thursday. The exhibition displays more than 400 treasures from Shaanxi province, Gansu province and 14 other regions. It is largest scale exhibition that shows the history of the Silk Road in recent years. As APEC is going on in Beijing, the exhibit aims to show the world this brilliant section of history. The Silk Road is a series of trade and cultural transmission routes that