【正文】 value, calculate out controlling amount vi after PID regulates operation, and then change into the electric current and output the signal, and then enlarged and controlled leading the open angle of silicon controlled rectifier, realize regulating the function of the electricity electromechanical magnetism clutch excitation electric current of slippery difference, thus regulate the rotational speed of the slippery difference electrical machinery of executive body, enable transporting the flow of supplies on belts to stabilize in the adjacent place of settlement value as much as possible, have a good static index and dynamic performance.Automatic batching and weighing system is widely applied in industrial and agricultural production and social life in all areas. Especially the metallurgy, coal, chemicals, cement industries, often need to spread in the dynamic process of belt conveyor, and continuous weigh on conveying the flow adjustment and control, accurate ratio.The quality control of ingredients directly relates to the enterprise can produce smoothly. If the quality of pound reach requirements, causing a waste of energy, raw materials, while influence the quality of the products and productivity, and some of the important position of the ingredients for the production of mistakes even a accident. Therefore, the high precision and ingredients ingredients and how quickly the whole manufacturing restricts the product quality and yield response, so the quality and yield of pounding process control give enough attention. Electronic says automatic batching system can be set according to the input ratio and flow control of material flow, thereby achieve control of product quality and yield of the objective is to realize the automatic production process, and intelligent, enterprise39。當(dāng)散落在輸送皮帶機(jī)上的物料通過(guò)秤體時(shí)，秤體中的稱重傳感器和測(cè)速傳感器分別把重量毫伏信號(hào)和帶速脈沖信號(hào)通過(guò)接線盒送往皮帶秤儀表自動(dòng)配料系統(tǒng)的總體設(shè)計(jì)思想為：皮帶輸送機(jī)投入運(yùn)行前，輸送皮帶上物料流量的設(shè)定值由操作人員在鍵盤上設(shè)定。并將流量信號(hào)以4~20毫安模擬電流的形式送給工控機(jī)，工控機(jī)將流量信號(hào)與機(jī)內(nèi)設(shè)定值比較后，根據(jù)一定的控制規(guī)則輸出4~20毫安調(diào)節(jié)信號(hào)，控制現(xiàn)場(chǎng)給料機(jī)的轉(zhuǎn)速，從而構(gòu)成單機(jī)閉環(huán)系統(tǒng)，達(dá)到控制某種物料流量的目的。配料皮帶秤的結(jié)構(gòu)組成主要由輸送機(jī)架、稱重傳感器、測(cè)速傳感器、秤架、主動(dòng)滾筒、從動(dòng)滾筒、輸送帶、張緊裝置、拖動(dòng)裝置、調(diào)偏裝置等組成。報(bào)表管理模塊的功能是第一次進(jìn)入查詢頁(yè)面時(shí)，操作人員可對(duì)所有通道的歷史配料數(shù)據(jù)進(jìn)行瀏覽和打印，查詢時(shí)可按照通道號(hào)，班次和日期時(shí)間進(jìn)行配料數(shù)據(jù)的查詢，生成報(bào)表和打印。本系統(tǒng)主要由配料電子稱，儀表控制柜，變頻器柜，工業(yè)控制微型計(jì)算機(jī)，及監(jiān)控管理軟件幾部分組成。隨著工業(yè)生產(chǎn)的迅速發(fā)展，電子皮帶秤配料系統(tǒng)的需求量日益增大，被廣一泛應(yīng)用于冶金、建材、電力、化工、食品等行業(yè)的工藝控制。自動(dòng)稱重配料系統(tǒng)是一種連續(xù)累計(jì)自動(dòng)控制系統(tǒng)，廣泛用在煤炭、化工、冶金、建材、食品等關(guān)系國(guó)計(jì)民生的各個(gè)行業(yè)，配料系統(tǒng)可對(duì)物料的配比實(shí)現(xiàn)累計(jì)量控制，而準(zhǔn)確的累計(jì)量控制可提高產(chǎn)品質(zhì)量，降低生產(chǎn)成本，提高勞動(dòng)效率。電子稱自動(dòng)配料系統(tǒng)可以按照設(shè)定配比和流量控制各輸入物料的瞬時(shí)流量，從而達(dá)到控制各種產(chǎn)品的質(zhì)量和產(chǎn)量的目的，是實(shí)現(xiàn)生產(chǎn)過(guò)程自動(dòng)化和智能化、企業(yè)的科學(xué)管理、安全穩(wěn)定生產(chǎn)和節(jié)能降耗的重要技術(shù)手段。，Visual ，簡(jiǎn)單易用，實(shí)用性強(qiáng)等優(yōu)點(diǎn)，在國(guó)內(nèi)外得到廣泛的應(yīng)用。其連接方式采用關(guān)節(jié)軸承，處于受拉狀態(tài)，其抗側(cè)向力的能力強(qiáng)，可安裝于封密的梁內(nèi)，結(jié)構(gòu)緊湊。4）：工業(yè)控制微型計(jì)算機(jī)及軟件工控機(jī)主機(jī)選用華碩IPC610型14架裝式工業(yè)PC機(jī)箱，配置PCA6179L全長(zhǎng)CPU卡，512M內(nèi)存，80G硬盤，一個(gè)PCL746+四端口RS232\422\485通訊接口卡，2個(gè)PCI1720U型4通路隔離模擬量輸出卡，工控機(jī)作為上位機(jī)，通過(guò)RS485雙向通信接口與皮帶稱儀表聯(lián)機(jī)，通過(guò)RS232雙向通信接口與動(dòng)力控制柜中的PLC聯(lián)機(jī)，輸出模擬量控制信號(hào)控制給料機(jī)的給料流量，從而構(gòu)成完整的配料系統(tǒng)。8031系統(tǒng)再將流量實(shí)際值與其設(shè)定值進(jìn)行比較，經(jīng)PID調(diào)節(jié)運(yùn)算后計(jì)算出控制量vi，再轉(zhuǎn)換為電流輸出信號(hào)h后而后經(jīng)放大去控制可控硅的導(dǎo)通角，實(shí)現(xiàn)調(diào)節(jié)滑差電機(jī)電磁離合器勵(lì)磁電流的功能，從而調(diào)節(jié)執(zhí)行機(jī)構(gòu)滑差電機(jī)的轉(zhuǎn)速，使輸送皮帶上的物料流量盡可能穩(wěn)定在設(shè)定值附近，并具有良好的靜態(tài)指標(biāo)和動(dòng)態(tài)性能。Automatic batching and weighing system system Now, along with the development of science and technology, Automatic batching and weighing system has been widely used in metallurgy, coal, chemicals, building material industry, etc. Automatic batching and weighing system can be