【正文】
運輸設(shè)備包括骨料運輸設(shè)備、水泥輸送設(shè)備以及水泵等。二是八十年代末到九十年代初“發(fā)展一站三車 (即混凝土攪拌樓(站 )、混凝土攪拌輸送車、臂架式混凝土泵車和散裝水泥車 ),把我國商品混凝土機械搞上去”的戰(zhàn)略,推動了混凝土機械行業(yè)的第二次產(chǎn)品結(jié)構(gòu)調(diào)整,反映了混凝土機械行業(yè)穩(wěn)定、持續(xù)、全面發(fā)展的深層次要求。產(chǎn)品技術(shù)標準和預(yù)拌混凝土標準的要求中,對于混凝土攪拌站 (樓 )的技術(shù)指標己達到發(fā)達國家水平。目前,德國、美國、意大利、日本等國家的攪拌站在技術(shù)水平和可靠性方面處于領(lǐng)先地位。可編程控制器 (PLC)具有可靠性高、功能完善、編程簡單且直觀,能夠有效地彌補繼電器控制系統(tǒng)的缺陷。 隨著我國經(jīng)濟建設(shè)的高速發(fā)展,許多大型的 基礎(chǔ)工程及建筑工程相繼開工。 1969 年美國 DEC 公司研制的第一臺 PDP14 型 PLC。Programmable logic controller(PLC)。 關(guān)鍵詞: 混凝土攪拌站; I/O 分 配;可編程控制器( PLC);自動控制 洛陽理工學(xué)院畢業(yè)設(shè)計(論 文) III The designing of the controlling and monitoring program for concrete mixing stations which based on PLC ABSTRACT With the rapid development of China39。 常見的混凝土攪拌站控制方式有繼電器直接控制、 PLC和計算機結(jié)合以及 PLC和配料控制器結(jié)合 3 種控制方式。建設(shè)優(yōu)質(zhì)的工程需要高品質(zhì)的混凝土,而且隨著人們環(huán)保意識的加強,為了減少城市噪音和污染,交通和建筑管理部門要求施工用的混凝土集中生產(chǎn)和管理。這樣,不僅要求混凝土的配料精度高,而且要求生產(chǎn)速度快,因此,混凝土生產(chǎn)過程中攪拌設(shè)備自動控制系統(tǒng)日益受到人們的重視。采用 PLC 和配料控制器結(jié)合控制的攪拌站性能可靠、性價比高,可以保證混凝土的質(zhì)量,提高混凝土生產(chǎn)效率。s economic construction, the basis for many large engineering and construction projects have been started. Construction of high quality project needs highquality concrete, and with the strengthening of environmental consciousness, in order to reduce urban noise and pollution, traffic and construction management department for the construction of concrete used in concentration of production and management. This requires not only the ingredients of concrete, high precision, and require the production speed, therefore, the production process of concrete mixing equipment automatic control system has attracted attention. Programmable controller with high reliability, functional, simple and intuitive program can effectively make up for the relay control system defects. For these reasons, I designed the product based automatic control system of concrete mixing equipment. Common control of concrete mixing station has direct control of relays, PLC and puter and PLC integration and bination of ingredients controller 3 control. Batching Controller using PLC and the control of mixing with reliable, costeffective, can guarantee the quality of concrete to improve concrete production efficiency. As the core of concrete mixing station, control and monitoring procedures in the measurement of precise, reliable control, easy management, and other requirements are increasing. In this paper, bined with PLC control and ingredients mixing station controller to design the control and monitoring process design of the main tasks to be acplished in a systematic structure, PLC39。 Automatic control 洛陽理工學(xué)院畢業(yè)設(shè)計(論 文) IV 目 錄 前 言 ...................................................................................................1 第 1 章 混凝土攪拌站系統(tǒng)概述 ..........................................................3 混凝土攪拌站的組成 ..............................................................3 電控系統(tǒng)的構(gòu)成 ......................................................................5 稱重傳感器的選擇 ..................................................................7 小結(jié) .........................................................................................8 第 2 章 混凝土攪拌站控制系統(tǒng)設(shè)計 ..................................................9 控制系統(tǒng)設(shè)計的基本原則及步驟 ..........................................9 PLC 的工作原理 ................................................................... 10 可編程控制器的選用及編程調(diào)試軟件選擇 ........................ 13 2. 可編程控制器的選用 ................................................. 13 2. 編程調(diào)試軟件選擇 .................................................... 15 第 3 章 混凝土攪拌站 PLC程序設(shè)計 ................................................ 18 混凝土攪拌站 PLC 程序設(shè)計思想 ...................................... 18 混凝土攪拌裝置的工藝流程 ................................................ 18 系統(tǒng)初始化程序及主程序設(shè)計 ............................................ 19 報警電路的設(shè)計 .................................................................... 21 斷電保護程序設(shè)計 ................................................................ 21 I/O 分配表和模擬量輸入地址 ............................................. 22 位存儲區(qū)( M)的使用概況 ................................................ 24 小結(jié) ....................................................................................... 25 第 4 章 程序調(diào)試 ............................................................................... 26 模擬調(diào)試的準備工作 ............................................................ 26 仿真調(diào)試 ............................................................................... 26 系統(tǒng)初始化程序及主程序調(diào)試 .................................. 26 報警程序的調(diào)試 .......................................................... 29 小結(jié) ....................................................................................... 30 結(jié) 論 ................................................................................................. 31 洛陽理工學(xué)院畢業(yè)設(shè)計(論 文) V 謝 辭 ................................................................................................. 32 參考文獻 ............................................................................................. 33 附錄 ..................................................................................................... 34 洛陽理工學(xué)院畢業(yè)設(shè)計(論 文) 1 前 言 可編程序邏輯控制器( PLC)自它誕生以來至今,以其極高的性能價格比以及一系列人所共識的優(yōu)點,