本文關(guān)鍵詞：微量高塑化流變制樣儀控制系統(tǒng)設(shè)計(jì)　出處：《湖北工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

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【摘要】：目前國(guó)內(nèi)外對(duì)新材料流變性能和力學(xué)性能的測(cè)試需要多套儀器設(shè)備共同配合,被測(cè)物料在多套儀器設(shè)備之間往復(fù)進(jìn)行,設(shè)備成本高、操作過(guò)程繁瑣,而且清洗工作量大、物料消耗較大。在合成初期,新材料合成量往往不足,難以滿足儀器設(shè)備對(duì)被測(cè)物料消耗量的要求,不能完全達(dá)到對(duì)流變參數(shù)和力學(xué)性能參數(shù)測(cè)試的目的,有時(shí)只能有選擇的測(cè)試1-2個(gè)參數(shù)。針對(duì)上述問(wèn)題,本文設(shè)計(jì)一款功能高度集成的流變制樣儀控制系統(tǒng),使其同時(shí)具有轉(zhuǎn)矩流變測(cè)試、毛細(xì)管擠出流變測(cè)試、毛細(xì)管注射流變測(cè)試和擠注快速換模制樣的功能,用于天然高分子材料和合成高分子材料的加工性能測(cè)試和使用性能制樣。首先,通過(guò)對(duì)流變儀和制樣儀原理進(jìn)行分析,設(shè)計(jì)流變制樣儀控制系統(tǒng)總體方案。通過(guò)采用PLC控制及伺服電機(jī)控制技術(shù),構(gòu)建基于Modbus RTU通訊協(xié)議的流變制樣儀控制系統(tǒng)。該系統(tǒng)是以計(jì)算機(jī)為核心的集散控制系統(tǒng):計(jì)算機(jī)將控制指令傳遞給PLC,PLC通過(guò)Modbus RTU通訊協(xié)議與各個(gè)設(shè)備之間進(jìn)行通信,可以大大提高系統(tǒng)檢測(cè)數(shù)據(jù)的可靠性,便于日后儀器的維護(hù)和擴(kuò)展。其次,設(shè)計(jì)溫度控制模塊、動(dòng)力驅(qū)動(dòng)模塊、位置控制模塊。各個(gè)模塊自行執(zhí)行計(jì)算機(jī)的指令并采集相應(yīng)的數(shù)據(jù)并返回給PLC,最后由PLC將數(shù)據(jù)進(jìn)行整合上傳給計(jì)算機(jī)。由PLC的溫度測(cè)量模塊實(shí)現(xiàn)對(duì)加熱電阻絲溫度的控制;壓力和轉(zhuǎn)矩測(cè)量則由兩臺(tái)伺服電機(jī)的控制器采集伺服電機(jī)反饋扭矩經(jīng)計(jì)算機(jī)進(jìn)行相應(yīng)換算實(shí)現(xiàn);位置控制子系統(tǒng)通過(guò)外部編碼器讀取推料桿實(shí)時(shí)位置數(shù)據(jù),由計(jì)算機(jī)根據(jù)實(shí)時(shí)位置對(duì)伺服電機(jī)進(jìn)行控制,可實(shí)現(xiàn)高精度位置控制;同時(shí)有一臺(tái)合模步進(jìn)電機(jī),在制樣擠出時(shí)將模具與擠出口牢牢固定。然后,根據(jù)功能模塊對(duì)其控制系統(tǒng)軟件進(jìn)行設(shè)計(jì),流變制樣儀控制系統(tǒng)軟件由上位機(jī)控制軟件和下位機(jī)模塊控制程序組成。計(jì)算機(jī)主控軟件包括用戶接口模塊、下位機(jī)設(shè)備相應(yīng)軟件控制模塊和數(shù)據(jù)分析模塊。下層設(shè)備主要包括溫度控制模塊、動(dòng)力驅(qū)動(dòng)模塊以及位置控制模塊。最后設(shè)計(jì)實(shí)驗(yàn)對(duì)流變制樣儀控制系統(tǒng)進(jìn)行驗(yàn)證,實(shí)驗(yàn)表明,本文設(shè)計(jì)的流變制樣儀控制系統(tǒng)功能集成度高,工作效率高,而且可以提高測(cè)試精度,減少被測(cè)物料消耗,還可以滿足新材料研究過(guò)程中必要的實(shí)驗(yàn)需求。
[Abstract]:At present, the test of rheological and mechanical properties of new materials at home and abroad requires multiple instruments and equipment to cooperate with each other. The tested materials are reciprocating between multiple sets of instruments and equipment. The equipment cost is high, the operation process is tedious, and the workload of cleaning is large, and the consumption of materials is large. In the early stage of synthesis, the amount of new materials is often insufficient, which is difficult to meet the requirements of instruments and equipment for the consumption of tested materials, and can not achieve the purpose of testing rheological parameters and mechanical properties. Sometimes only 1-2 parameters can be selected selectively. Aiming at the above problems, this paper designs a highly integrated flow sampling instrument control system, which has the torque rheological test, Capillary Extrusion rheological test, rheological test and capillary extrusion injection molding quick change kind of function, performance test for processing natural polymer and synthetic polymer materials and performance of sample preparation. First, through the analysis of the principle of the convective instrument and the sample making instrument, the overall scheme of the control system of the rheometer is designed. By using PLC control and servo motor control technology, a rheological sample control system based on Modbus RTU communication protocol is constructed. The system is a distributed control system with the core of computer: computer control instructions to PLC, the communication between PLC and other RTU devices through the Modbus communication protocol, can greatly improve the reliability of test data of the system, to facilitate the maintenance and expansion of the day after the instrument. Secondly, the temperature control module, the power drive module and the position control module are designed. Each module carries out the instructions of the computer and collects the corresponding data and returns it to the PLC. Finally, the data is integrated and uploaded to the computer by PLC. By the temperature measurement module PLC to achieve control of the heating resistance wire temperature; pressure measurement and torque controller of servo motor by the acquisition of two servo motors torque feedback via computer, the corresponding realization of conversion; position control system reads the pushing rod real time position data through the external encoder, by the computer according to the real-time position of servo control the motor, which can achieve high precision position control; at the same time there is a clamping stepper motor, in preparation of Extrusion Moulds and extrusion firmly. Then, according to the function module, the control system software is designed. The control software of rheology sampling instrument is composed of upper computer control software and slave module control program. The computer main control software includes the user interface module, the software control module of the lower computer equipment and the data analysis module. The lower equipment mainly includes the temperature control module, the power drive module and the position control module. The final design of experimental verification is performed on the rheological sampling instrument control system experiment shows that this design flow sampling instrument control system features high integration, high working efficiency, and can improve the precision and reduce the measured material consumption, can also meet the requirements of the experimental research of new materials in the process of.
【學(xué)位授予單位】：湖北工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TQ315;TP273

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本文編號(hào)：1339982