共查询到20条相似文献，搜索用时 640 毫秒
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PLC是可编程逻辑控制器的简称。本文以PLC在机械手控制中的应用为例，介绍PLC的应用原理以及使用方法。 相似文献
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基于VB平台PLC电梯控制仿真系统设计 总被引：3，自引：0，他引：3
介绍了PLC电梯仿真系统的设计与实现。基于VB制作电梯PLC控制仿真平台，主控制程序运行于PLC中，使用VB的MSCOMM控件实现PC与PLC实时的通讯，实验效果直观生动。 相似文献
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《兰州石化职业技术学院学报》2021,21(2)
西门子公司生产的S7系列PLC是我国工业企业中使用量最大的PLC之一,在企业中由于PLC的大量使用,它们之间的控制和数据交换必然会非常频繁。设计了用1台S7-1200PLC控制2台S7-200 SMART PLC的实现方法,阐述了从硬件组网、通信程序编写到控制程序编写,希望对从事这方面研究的技术人员有所帮助。 相似文献
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秦伟 《郧阳师范高等专科学校学报》2003,23(8):81-82
近年来PLC在我国的发展相当迅速，已成为我国机电一体化产品首选的控制装置，本从实际考虑提出了一种PLC首发故障的诊断程序，当几个故障同时显示时，使用这种方法能准确地判断出初始的引发故障，从而提高了设备的维修效率。 相似文献
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孔祥清 《天津成人高等学校联合学报》2004,6(2):92-94
PLC在石油钻杆检修生产线上的应用，可以充分发挥其控制特点和使用的优越性。根据石油钻杆检修生产流程，结合较典型的工位，详述其工作原理及工作过程和检查方法，用在生产实践中的成效，表明PLC在工业生产的广泛应用前景。 相似文献
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杜国华 《晋城职业技术学院学报》2019,12(3):86-87,92
介绍了一种基于PLC控制追光的光伏发电站设计,利用西门子PLC实现对光源的追踪控制,涉及光伏发电、触摸屏控制、光学传感器的使用以及PLC控制的设计思路。 相似文献
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在工业生产中,需要用闭环控制方式来实现流量、压力、温度等连续变化的模拟量控制,使用PLC的数字控制系统PID控制都得到了广泛的应用。本文介绍了在实验室环境下,通过实验模型利用PLC实现PID控制的方法。 相似文献
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加工汽车后桥螺旋锥齿轮，使用了美国Gleason №27磨齿机，该磨齿机只带来一块展成凸轮，而要满足该机功能需要壹套共42块凸轮。我们对原凸轮进行了分析，并对工作曲线部分的刀具轴线数学模型进行了推导，用该数学模型在加工中心上成功的加工了全部凸轮。 相似文献
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在使用PLC进行电气控制时,有时必须了解PLC的工作原理,才能避免出现错误,达到满意的控制效果。本文指出了在PLC程序设计中易出现的错误,分析了其产生的原因．并通过实例给出了正确的概念及编程方法。 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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GUO Bao-feng Xiao Da-wei 《重庆大学学报(英文版)》2005,4(3):129-133
Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator＇s Garden. Translating building data to the Virtual Reality Modeling Language （VRML） is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching. 相似文献