【正文】 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 11 / 11 saying Sales on Chinese Valentine39。礦車在斜坡運(yùn)行過程中， PLC 根據(jù)檢測(cè)出的礦車運(yùn)行速度和用戶設(shè)定的值進(jìn)行對(duì)比，當(dāng)?shù)V車速度超過設(shè)定值時(shí)，擋車欄鋼絲繩網(wǎng)提升開啟，防止跑車造成的事故，反之關(guān)閉。經(jīng)過分析， 確定 煤礦礦車防跑車系統(tǒng) 共需要 5 點(diǎn)輸入和 4 點(diǎn)輸出 ，為了以后的調(diào)整和工藝改進(jìn)的需要，在實(shí)際統(tǒng)計(jì)的 I/O 點(diǎn)數(shù)基礎(chǔ)上，一般應(yīng)加上10％～ 20％的備用量，因此選用了 S700 中 CPU224 型 PLC，它具有 14 點(diǎn)輸入和 10 點(diǎn)輸出。圖 33 分多段檢測(cè)礦車運(yùn)行速度方案?？删幊炭刂破鳎ê?jiǎn)稱 PLC）是一種 新型的具有極高可靠性的通用工業(yè)自動(dòng)化控制裝置。 程序調(diào)試結(jié)果表明本次設(shè)計(jì)的系統(tǒng)能夠?qū)崿F(xiàn)對(duì)礦用擋車欄的自動(dòng)和手動(dòng)控 制，可與上位機(jī)進(jìn)行通訊。該系統(tǒng)應(yīng)實(shí)現(xiàn)以下功能要求： (1)能夠有效的對(duì)擋車欄進(jìn)行控制，分為手動(dòng)控制和自動(dòng)控制兩種方式； (2)能夠?qū)ΦV車的運(yùn)行狀態(tài)進(jìn)行實(shí)時(shí) 監(jiān)控，當(dāng)?shù)V車運(yùn)行出現(xiàn)問題時(shí)可及時(shí)報(bào)警并控制擋車欄對(duì)礦車進(jìn)行攔截。西門子 S7200 系列，是 S7 系列中最先進(jìn)的超級(jí)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。 表 21 煤礦礦車防跑車系統(tǒng) PLC 輸入 /輸出模塊對(duì)應(yīng)用途 5 煤礦礦車防跑車系統(tǒng) PLC 程序 經(jīng)過詳細(xì)研究擋車欄的工作原理和控制要求，該系統(tǒng) PLC 程序設(shè)計(jì)采用了分系統(tǒng)設(shè)計(jì)的思想，主要包括三個(gè)部分：位置檢測(cè)系統(tǒng)、擋車欄系統(tǒng)、監(jiān)控報(bào)警系統(tǒng)。 參考文獻(xiàn) 1 陳立定 . 電氣控制與可編程序控制器的原理及應(yīng)用 [M]. 北京：機(jī)械工業(yè)出版社， . 2 楊長(zhǎng)能等．可編程控制器（ PC）基礎(chǔ)及應(yīng)用 [M]．重慶大學(xué)出版社，1992. 3 何衍慶．可編程控制器原理及應(yīng)用技巧 [M]．北京：化學(xué)工業(yè)出版社，1998. 4 王晨，賈福音等．斜井跑車保護(hù)裝置的研究現(xiàn)狀與發(fā)展趨勢(shì) [J]．煤礦機(jī)械 ， 2021， 31(3). 5 陳拓其．一種新型礦車防跑車機(jī)構(gòu)的設(shè)計(jì)與仿真 [J]．礦山機(jī)械，2021， 37(17)： 3840． 10 / 11 請(qǐng)您刪除一下內(nèi)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(qǐng)您刪除一下內(nèi)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 largest virgin forest, and known for its spring and ecological environment, Arxan is marveled at by many tourists as the purest land on earth. You cannot miss out the Autumn of Arxan. It is definitely the best with brightlycolored scenery full of emotions. Autumn in the northern part of the country es earlier than the South. A September rain followed by the footprints of Autumn brings more colors to the once emerald green mountain and blooming grassland. Shutterbugs flock to see for themselves the marvel of splendid colors around the mountains and waters, many of whom have travel a long distance and even camp here only to capture a moment of the nature wonder. The silver birch turns golden, while the larch is still proudly green. You will find yourself drowned in the intoxicating red of the wild fruits as well as the glamour of flowers in full blown. And your heart will be lingering on the woods as it39。使用西門子公司的 STEP7MicroWIN SP6 編程軟件。 ● 布爾量的運(yùn)算速度 ()。以下的單軌提升運(yùn)輸斜巷中運(yùn)行，當(dāng)斜巷礦車發(fā)生跑車時(shí)，將會(huì)造成很大安全事故，造成人身設(shè)備傷亡。 關(guān)鍵詞： PLC 擋車欄 控制系統(tǒng) 通訊 2 / 11 前 言 斜井軌道提升時(shí)煤礦提升系統(tǒng)中的一個(gè)重要組成部分，但目前斜井軌道提升系統(tǒng)在運(yùn)行過程中跑車事故發(fā)生頻率較高，是煤礦安全生產(chǎn)的薄弱環(huán)節(jié)。為了解決這一問題，多數(shù)煤礦選擇在斜井中安裝擋車欄裝置，擋車欄裝置可以有效的對(duì)發(fā)生跑車的礦車進(jìn)行攔截，避免 造成重大人員傷亡及財(cái)產(chǎn)損失。 煤礦礦車防跑車系統(tǒng) 主要由核心控制器、位置檢測(cè)系統(tǒng)、擋車欄系統(tǒng)、監(jiān)控報(bào)警系統(tǒng)等部分組 。 ● 豐富的功能擴(kuò)展模塊 (最大可擴(kuò)展 7 個(gè)模塊 )。圖 24 為位置檢測(cè)系統(tǒng)邏輯流程。 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