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以高温梭式窑的工艺控制为背景,分析了影响系统温度的各个主要因素,确定系统温度控制方案为采用3个单闭环PID的控制方式.采用S7-300PLC作为下位机,用以采集实时数据与控制现场设备.将工控机作为监控系统的上位机,通过组态王软件实现对下位机的实时监控.实验室仿真结果表明:监控系统完全能够满足系统工艺控制要求,稳定性高,在温度控制精度与跟随特性上能够满足产品生产的要求,具有一定的借鉴价值. 相似文献
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本文对液压激振系统的控制原理进行了分析,提出了结晶器激振系统数据采集方案,利用下位机PLC对压力、温度、流量、过滤器状态等信息进行采集,在上位机实现显示、记录、打印等功能。对分别以VB和WinCC组态软件作为监控软件的开发作了比较,并选择WinCC作为上位机的监控开发软件,开发了结晶器在线监测系统,主要包括主界面、电液伺服阀界面、伺服油缸界面以及液压系统界面。利用C函数实现报表打印等功能,并对激振系统的重要状态参数以数字或趋势的形式实时显示,为故障诊断提供了依据。 相似文献
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利用组态监控软件对多用炉上位机控制系统进行开发和扩展,使得多用炉系统能够实现对工作现场生产过程的实时监控、数据传输、实时处理、工艺选择、温度碳势记录、趋势曲线显示.可以将所有的操作过程以多个动态画面直观、形象地显示出来.多用炉系统的工作效率得到了显著的提高. 相似文献
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针对目前水泵测试系统存在的自动化程度低、功能单一等问题,以工控机为载体,基于上位机与下位机协作控制的方式,研制一套电子水泵综合性能测试系统。该电气系统下位机采用PLC控制比例阀和真空泵等电气元件,完成测试流程控制;采用温控仪控制加热棒工作,可自动调节测试介质温度;基于研华高精度数据采集模块采集传感器数据并传输给上位机;上位机以LabVIEW为平台开发测试系统软件,实现数据交互、数据处理、报表生成等功能。结果表明:该系统可实现不同功率的电子水泵在各温度条件下的流量-扬程、流量-功率、流量-汽蚀余量等性能的高度自动化测试。 相似文献
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以VC++6.0、ADO数据库引擎和Microsoft Access数据库为工具,以模块化和面向对象的编程理念开发了板材液压成形监控系统,重点介绍该系统的加载曲线数据管理模块、采样数据管理模块、曲线动态显示模块和液压机动作及加工过程控制模块的编程实现方法.该系统实现了上位机控制液压机动作、选择加载工艺曲线、动态监控工艺... 相似文献
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模具渗硼工艺及其发展应用 总被引:4,自引:0,他引:4
渗硼是提高模具使用寿命的重要途径,是在金属表面形成高硬度的金属硼化层,显著提高其耐磨性,且具有良好的耐热性和耐蚀性。近年来,随着渗硼工艺逐步改进和完善,已发展了复合渗、多元共渗及低温渗硼工艺,取得了良好的经济效果。 相似文献
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A. A. Babakov 《Metal Science and Heat Treatment》1967,9(10):764-770
Conclusions Highly alloyed steels and alloys are produced in conformity with GOST or technical specifications in thick and thin sheets, beams and channels, bars, hot-rolled and cold-rolled pipe, and rod. Castings are produced in the specialized plant of the Ministry of Chemical and Petroleum Machine Building.The technology of welding stainless steels and alloys is given in [15] and [16].TsNIIChERMET. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 10, pp. 43–50, October, 1967. 相似文献
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A. Yu. Tsivadze G. V. Ionova V. K. Mikhalko 《Protection of Metals and Physical Chemistry of Surfaces》2010,46(2):149-169
The possibility of using unique properties of lanthanides in the nanotechnology is demonstrated. The origination of linear
and nonlinear optical properties of lanthanide compounds with phthalocyanines, porphyrins, naphthalocyanines, and their analogs
in solutions and condensed state and the prospects of obtaining novel materials on their basis are discussed. Based on the
electronic structure and properties of lanthanides and their compounds, namely, optical and magnetic characteristics, electronic
and ionic conductivity, and fluctuating valence, molecular engines are classified. High-speed storage engines or memory storage
engines; photoconversion molecular engines based on Ln(II) and Ln(III); electrochemical molecular engines involving silicate
and phosphate glasses; molecular engines whose operation is based on insulatorsemiconductor, semiconductor-metal, and metal-superconductor
types of conductivity phase transitions; solid electrolyte molecular engines; and miniaturized molecular engines for medical
analysis are distinguished. It is shown that thermodynamically stable nanoparticles of Ln
x
M
y
composition can be formed by d elements of the second halves of the series, i.e., those arranged after M = Mn, Tc, and Re.
Prospects of using lanthanide superconductors in nanotechnology are considered. 相似文献
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金刚石、CBN有序排列及择优取向工具的研发及应用 总被引:1,自引:0,他引:1
有序排列/择优取向超硬材料工具的技术创新,将广泛适用于电镀、树脂、陶瓷、金属结合剂制品工具中,使用超硬材料颗粒在结合剂中均匀排列并择优定向,以最大潜能的发挥超硬材料各个方面固有的特性。并针对不同的加工对象,有选择性的使用超硬材料各自不同的特性,从而使超硬材料工具将以经济、高质与高效的优势替代传统的超硬材料工具并将进入新兴的加工领域,为生产企业带来新的发展机遇。本文将对有序排列与择优取向技术的研究现状及其在不同的金刚石工具中的应用做一阐述。 相似文献
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V. Kulikovsky V. Vorlí?ek M. Stranyánek R. ?tvrtlík A. Kurdyumov 《Surface & coatings technology》2008,202(9):1738-1745
Hydrogen-free amorphous and nanocrystalline films were prepared by magnetron sputtering of the SiC or Si targets. Mechanical properties (hardness, elastic modulus, intrinsic stress) and film structures were investigated in dependence on the substrate bias and temperature. It was found that both hardness and elastic modulus of all amorphous a-SiC films prepared at different substrate temperatures and biases are always lower than those for bulk α-SiC single crystal while the hardness of partially crystalline SiC films is higher and the elastic modulus lower than those for α-SiC one. In contrast, both hardness and elastic modulus of all amorphous Si films are always lower than those for nanocrystalline Si films which show approximately the same value as the Si single crystal. 相似文献