freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內容

畢業(yè)論文-基于plc的五層電梯控制系統(tǒng)設計(已修改)

2025-01-24 12:39 本頁面
 

【正文】 廣州大學松田學院 畢業(yè)論文(設計) 題 目 基于 PLC 的五層電梯控制系統(tǒng)設計 二○一三 年 六 月 基于 PLC 的五層電梯控制系統(tǒng)設計 摘 要 隨著現(xiàn)代城市的發(fā)展,高層建筑日益增多,電梯成為人們日常生活必不可少的代步工具。而國內的電梯絕大部分是繼電器控制,線路復雜,節(jié)點接線多,故障率高,系統(tǒng)結構龐大,能耗較高,機械動作噪音大,嚴重地影響電梯運行質量。隨著 PLC的發(fā)展,性能不斷完善,它對電梯也有非常大的幫助。本設計利用 PLC 實現(xiàn)了電梯的指層控制、轎內與各層廳站呼梯指令的記 錄、電梯運行方向和停靠的層站的控制,自動運行和自動開關門等功能。該系統(tǒng)具有先進、可靠、經濟的特色。該電梯控制系統(tǒng)具有手動和自動的功能,并且具有指層、廳召喚、選層、選向等功能。 關鍵詞: 電梯, PLC,控制 Design of Fivestorey Elevator Control System Based on PLC Abstract With the development of modern cities, an increasing number of highrise building, elevator bee an indispensable means of transport of daily life. But,the elevator most controls by the relay domestically and plex wiring, more node in the wiring, the high failure rate, the system structure is large, high energy consumption, mechanical movement noise and seriously affect the quality of elevator the developing of the PLC, it constantly improves the performance, so it has very much help to the the PLC,these modules achieve the functions:fingering out the location of the cabin, registering the instructions from the cabin and the station hall. choosing the direction and the station of elevator follow these instructions, operating elevator and door automatically, and other system has advanced, reliable and economic characteristics. The elevator control system has the drivers to run the operation and no drivers or manual and automatic functions, and has means layer, called the Office of the election story, election to the functions. Key words:Elevator, PLC, Control 目 錄 1 緒 論 ............................................................................................................................................... 1 課題的背景及意義 .................................................................................................................... 1 電梯的發(fā)展現(xiàn)狀 ........................................................................................................................ 1 電梯繼電器控制系統(tǒng)的特點及存在問題 ................................................................................ 1 電梯繼電器控制系統(tǒng)的優(yōu)勢 ........................................................................................ 1 電梯繼電器控制系統(tǒng)存在的缺點 ................................................................................ 1 PLC 控制電梯的優(yōu)勢 ................................................................................................................. 1 2 可編程邏輯控制與電梯 ...................................................................................................................... 3 可編程邏輯控制 ......................................................................................................................... 3 PLC 的定義 ..................................................................................................................... 3 PLC 的發(fā)展趨勢 ............................................................................................................. 3 PLC 與繼電器控制系統(tǒng)比較 ......................................................................................... 3 電梯 ..............................................................
點擊復制文檔內容
研究報告相關推薦
文庫吧 www.dybbs8.com
公安備案圖鄂ICP備17016276號-1