钻井仪表应用技术现状及发展思路

对国内外钻井仪表应用技术的现状进行了对比，指出了国内钻井仪表应用存在的问题，并分析了问题存在的原因。笔者根据国内外先进企业钻井仪表技术应用经验，提出了钻井仪表应用技术的发展思路。     

转炉炼钢厂自动化仪表技术应用及分析

本文在梳理自动化仪表相关理论知识的基础上,探究了自动化仪表在转炉炼钢厂中发挥的重要作用,分析了自动化仪表控制系统的智能监控和测量等诸多功能,深入研究了转炉炼钢厂自动化仪表技术的实际应用,并对未来较长时间内转炉炼钢厂自动化仪表技术的展望趋势进行深入探讨,从而为我国转炉炼钢厂自动化仪表技术应用水平的稳步提升提供更多参考。     

化工仪表与自动化过程控制问题探索

基于供给侧改革的研究前提下,我国的综合国力和经济实力取得显著成果,同时促进了化工领域的发展,尤其是化工仪表自动化控制技术的研究与创新。现阶段,化工仪表与自动化控制技术的创新发展,主要依赖电气工程自动化技术,进而构建化工仪表自动化控制体系。本文依据化工仪表自动化控制作为入手点,论述了化工仪表自动化控制的应用特点,分析了化工仪表与自动化控制涉及的技术要点,进而为我国化工生产企业的发展奠定基础。     

《流程工业自动化仪表技术与应用汇编(第二版)》征购

正《流程工业自动化仪表技术与应用汇编(第二版)》[以下简称《汇编(2)》]是《流程工业自动化仪表技术与应用汇编(第一版)》的继续。两年前,由中国仪器仪表学会组织编写、天津出版传媒集团出版的《流程工业自动化仪表技术与应用汇编(第一版)》[以下简称《汇编(1)》]问世。两年来,《汇编(1)》得到了广大读者和流程工业自动化仪表技术专家的肯定及好评。事实证明,《汇编(1)》的出版,对于提高设计院、工业企业、自动化仪表企业技术人员的流程工业自动化仪表技术与应用的业务水平和工作能力,对于促进和发展我国流程工业自动化仪表技术与应用发挥了重要作用。流程工业是自动化仪表技术的主要应用领域,也是自动化仪表技术和产业发展的重要推动力量。在流程工业的不断发     

网络仪表及其应用

计算机及网络技术的发展使得网络仪表成为可能,企业管理的发展促进了网络仪表的发展。介绍了基于以太网技术的网络称重仪表,便于数据导入与导出的USB数据管理方式,实现称重仪表在不使用计算机情况下的多机通讯和数据共享,以及网络仪表的应用,推进仪表向网络化的方向发展,取代只有在计算机模式下才能实现网络化的老思路。为衡器行业向更高层次发展打下基础。     

热工仪表自动化技术应用探讨

以热工仪表作为研究对象,探究自动化技术在热工仪表中的具体应用情况,旨在发挥自动化技术的优势,提高热工仪表的自动化水平。利用自动化技术来进行热工仪表的性能优化与技术改进。通过自动化技术在热工仪表中的应用,不仅能够提高热工仪表的整体性能,还能够提高企业的生产效率与质量。自动化技术在热工仪表中具有明显的技术优势,在未来将有广阔的发展空间。     

开封仪表有限公司电磁产品赢得核电专家认可

新年伊始,开封仪表有限公司从国外厂商合同中竞争过来的核电流量计合同,迎来了牛年开门红。该批仪表量程宽,精度高,仪表外观质量要求苛刻,为核电质保最高级别01。核电厂已与国外厂商签订了订货合同,但仪表性能无法达到规定要求,严重影响了核电项目进度,该公司业务和技术人员充分利用其技术优势,认真分析该批仪表技术要求,毫不犹豫的接下了该批订单。     

机电一体化讲坛 第二讲 机电一体化的仪表

随着工业现代化发展 ,仪表与控制系统引入了大量当代高新技术 ,机电一体化产品日趋成熟。现代仪表和控制系统已成为现代支柱产业发展的重要组成部分 ,又是支柱产业现代化中最明显的发展标志。现代工业生产过程控制中的仪表和控制系统已广泛应用了微处理器技术、计算机软件技术、图形显示技术、通信网络技术、光电子技术、精细加工技术、优化控制技术、ＣＡＤ和ＣＡＴ技术等当代高新技术 ,新一代的仪表和控制系统以崭新的面目呈现在现代化工业生产过程自动化中。通过技术引进和合资合作生产 ,我国的仪表和控制系统在自我发展的基础上 ,借鉴了…     

中国仪器仪表学会和中国仪器仪表行业协会联合征集中国仪表和自动化技术、应用和产业发展60年史料

日前,中国仪器仪表学会和中国仪器仪表行业协会联合发出通知,征集中国仪表和自动化技术、应用和产业发展60年史料。通知说,仪表和自动化技术在我国走过了一条很不平凡的道路,经历了初期创业、发展壮大和改革创新几个阶段。早在1925年,前辈们就开始在国内建立仪表工厂,上世纪30年代设立中央工业试验所仪表馆等,集聚了我国最初的仪表和自动化技术人员。     

全国过程检测控制仪表年会召开

5月28日在上海宝钢举办了“全国过程检测控制仪表学术年会”。年会期间,召开了《自动化仪表》编委会。编委们审议了编辑部工作,商讨了《自动化仪表》杂志今后办刊方针,以及报导重点等有关问题。会上并成立了《自动化仪表》杂志第三届编委会。在全国过程检测控制仪表学术年会期间,进行宣读论文,及专题讨论。论文分为三类:过程检测控制仪表;压力测重技术及仪表;物位测量技术及仪表;共计95篇。在大会上很多仪器仪表界知名老专家宣读论     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

ANGULAR DISTORTION ALLOWABLE VALUE AND ASSESS METHOD OF WELD ON COKE TOWER

A graph as the new engineering method for estimate the safety of bulging deformation of coke tower is proposed. Through stresses analysis of circumferential weld of coke tower and comparing the stresses produced by pressure with heat stress of steady state, residual stress, bending stress produced by both itself weight and wind loads, it showed that the stresses produced by pressure on the angle distortion are the main factor of equivalent stress of the combined stress. After comparing four kinds of stress controlling conditions, the relation to stress with depth of angular distortion, grade of curvature of angular distortion and half of region of angular distortion has been inferred. Graph of deformation allowable value of coke tower for different condition by angular distortion and half of region of angular distortion has been plotted. The five steps for its engineering use have been explained. The lighter the grade of curvature is, the larger of bulge allowance, may be, and the bigger of depth of angular distortion may pose too. For the coke tower with a popular structure of Dg 5 400 mm×28 mm, the result by graph is nearly more than the result of two formulas formed by other research, the error is less than 7.0%. But, the graph can be easily applied to different size of angular distortion.