發(fā)布時(shí)間：2018-10-24 08:14

【摘要】：混凝土作為在海洋建筑工程運(yùn)作過程中的一種重要黏合劑，因工程需求的差異往往需要現(xiàn)場將各種原料按比例混合后，攪拌均勻并投入使用。因而，稱重配料是混凝土生產(chǎn)過程中至關(guān)重要的環(huán)節(jié)。 針對海上工程作業(yè)的實(shí)際特點(diǎn)，本文提出了一套自航式混凝土配料稱量系統(tǒng)的整體設(shè)計(jì)方案，并重點(diǎn)針對動(dòng)態(tài)稱重和精度優(yōu)化兩個(gè)關(guān)鍵問題進(jìn)行了研究。 針對實(shí)際工作流程，設(shè)計(jì)了一套完整的工藝方案，采用三層式結(jié)構(gòu)設(shè)計(jì)，完成了系統(tǒng)設(shè)備平臺(tái)的構(gòu)建，在保證完成生產(chǎn)任務(wù)的同時(shí)，節(jié)約了船體空間。 針對功能的需求設(shè)計(jì)，系統(tǒng)能夠完成現(xiàn)場實(shí)時(shí)監(jiān)控、信息采集處理、數(shù)據(jù)報(bào)表管理、人機(jī)交互、監(jiān)控系統(tǒng)保護(hù)和自診斷等功能。 針對硬件平臺(tái)的搭建，提出了由船載監(jiān)控中心和現(xiàn)場控制單元兩個(gè)部分構(gòu)成的設(shè)計(jì)方案�，F(xiàn)場控制單元由稱重傳感器、信號(hào)調(diào)理電路、儀表、PLC等構(gòu)成，主要完成現(xiàn)場信息數(shù)據(jù)采集、處理和設(shè)備控制功能。船載監(jiān)控中心設(shè)置在主機(jī)室，有工控機(jī)承擔(dān)所有工作任務(wù)。 針對系統(tǒng)精度優(yōu)化問題，從稱量方法、稱量電路、配料過程、物料流量四個(gè)方面對壓敏電阻接線方式，信號(hào)采集調(diào)理電路的共模干擾、熱偶問題，噪聲干擾等可能影響稱重精度的因素進(jìn)行了具體分析，并提出了相應(yīng)的精度優(yōu)化方案和改善措施。 最后，生產(chǎn)流程的控制通過STEP-7編程軟件編寫的控制程序來實(shí)現(xiàn)，應(yīng)用WinCC組態(tài)軟件實(shí)現(xiàn)對系統(tǒng)的實(shí)時(shí)監(jiān)控功能，設(shè)計(jì)出監(jiān)控界面主要流程畫面，，包括系統(tǒng)控制畫面，故障診斷畫面圖，參數(shù)設(shè)置畫面、參數(shù)核對和傳輸、數(shù)據(jù)存儲(chǔ)和打印等。
[Abstract]:Concrete is an important adhesive in the process of ocean building engineering. Because of the difference of engineering demand, it is necessary to mix all kinds of raw materials in the field and mix them evenly and put them into use. Therefore, weighing and proportioning is the most important link in concrete production. According to the actual characteristics of offshore engineering work, this paper presents a whole design scheme of self-propelled concrete proportioning weighing system, and focuses on two key problems of dynamic weighing and precision optimization. According to the actual work flow, a complete process scheme is designed, and the three-layer structure is adopted to complete the construction of the system equipment platform, which ensures the completion of the production task and saves the hull space at the same time. According to the requirements of the function, the system can complete the functions of real-time monitoring, information collection and processing, data report management, man-machine interaction, monitoring system protection and self-diagnosis. Aiming at the construction of hardware platform, a design scheme composed of shipborne monitoring center and field control unit is proposed. The field control unit is composed of weighing sensor, signal conditioning circuit, instrument, PLC and so on. It mainly accomplishes the functions of data collection, processing and equipment control. Ship-borne monitoring center in the main room, industrial control computer to undertake all the work. Aiming at the problem of system precision optimization, the common mode interference and thermocouple problems of varistor wiring, signal acquisition and conditioning circuit are discussed from four aspects: weighing method, weighing circuit, batching process and material flow. The factors which may affect the weighing accuracy such as noise interference are analyzed in detail and the corresponding precision optimization scheme and improvement measures are put forward. Finally, the control of the production process is realized by the control program written by STEP-7 programming software. The real-time monitoring function of the system is realized by using the WinCC configuration software, and the main flow picture of the monitoring interface is designed, including the control screen of the system. Fault diagnosis picture, parameter setting screen, parameter checking and transmission, data storage and printing, etc.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U674.33

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