电子衡接线盒剖析

1前言 接线盒是大型电子衡的主要配件。大型电子衡的受力元件,往往是由多个称重传感器组成。诸多称重传感器激励电压的分配、信号汇总、各类偏载误差的调整等,全靠接线盒来完成。因此,接线盒在称重系统中有着举足轻重的地位。     

西门子发布数字接线盒

<正>西门子全新推出了用于称重领域的Siwarex DB数字接线盒,具有坚固的外壳,IP66防护等级,可轻松集成到SIMATIC环境中。该数字接线盒进一步扩展了西门子称重产品组合,与系统无缝集成,可确保比以往更全面地采集并监测每只模拟称重传感器的运行状态。既可用于有针对性的称重过程控制,又可用于扩展诊断,且任何故障信息都能通过SIMATIC控制器和HMI清晰显示。西门子控制系统和Siwarex WP称重电子模块的无缝集成,可随时对称重传感     

数字称重系统--称重技术新概念

本文从深层次探讨数字称重系统在衡器中的应用,阐述了数字称重系统的基本概念,介绍了数字传感器和数字接线盒的主要特点和优点,并结合一些数字和实例,证明了数字称重系统是称重技术发展的必然趋势.     

数字接线盒在汽车称重系统中扩展应用的探讨

数字接线盒利用数字化技术不仅提高称重计量准确度,而且具有在称重系统安装调试方便、电子元器件抗干扰能力强、数据传输距离远、系统自诊断、反作弊功能以及能够实现判别传感器故障等特点.     

赛多利斯工业称重设备(北京)有限公司产品召回通知

<正>赛多利斯工业称重设备(北京)有限公司根据公司内部质量要求规定,决定自2015年7月7日起至2015年8月31日止,召回2014年12月至2015年5月间生产的PR 6130C/64Sa和PR6130C/64S接线盒。此次召回是由于改进接线盒制造工艺后,发现新的工艺流程导致接线盒有可能在极端恶劣气候条件下,发生通讯不稳定,甚至防浪涌措施失效的可能性,从而造成料罐称重系统的称量误差甚至损坏。赛多利斯工业称重设备(北京)有限公司将对     

良好接地是电子衡器防雷击的可靠保障

本文主要介绍了在电子衡器系统中,仪表、接线盒及称重传感器等部位接地装置的优化,从而达到保护电子衡器设备,确保计量工作正常开展的目的。     

沥青拌合设备物料计量控制系统

专利申请号：CN200920089816．0公开号：CN201392234申请日：2009．04．24公开日：2010．01．27申请人：南阳市亚龙筑路机械制造有限公司本实用新型公开了物料计量控制技术领域的一种沥青拌合设备物料计量控制系统,具有传感器、传感器接线盒、PLC和PC机组成,其特征在于：还具有称重仪表,所述传感器通过传感器接线盒连接称重仪表,PLC连接在称重仪表上直接读取称重仪表数值,PLC与Pc机连接。与现有技术相比,计量系统稳定性好,反应速度快、计量精度高,满足高等级公路的施工要求,适应在野外比较恶劣的工作环境下生产。     

多传感器组秤角差调整原理及接线盒

本文叙述接线盒连接起各个传感器,然后输出给称重仪表。除了信号可以有累加功能外,接线盒的另一个重要作用是让人对秤的角差进行调整。目前称重行业一共有三种主流的角差调整方式,各有利弊,对传感器的性能要求也不一样。     

防爆称重传感器及其应用

石油、化工、化纤、化肥、煤炭、炼油、军火等工业部门,在产品生产和储运过程中的称重计量,由于常有易燃易爆的危险性气体或粉尘,必须采用防爆电子秤。本文介绍了各类防爆电子秤常用的本质安全型、隔爆型和增安型应变式称重传感器,并联组秤时所用的隔爆接线盒的防爆型式与所采取的防爆措施,并简要的介绍了防爆称重传感器在防爆电子称重系统中的应用。     

涂附磨具生产线涂胶量测控系统的研究与应用

涂附磨具生产线中测量和控制涂胶量是保证产品质量的重要环节.本文提出了利用测量胶桶内胶水重量的变化量来获得涂附磨具生产线涂胶量的称重法测量控制方案,主要运用胶桶称重传感器、胶盆称重传感器、接线盒、工控计算机和显示仪表等组成的胶水称重法测控系统,实现对涂附磨具生产线中涂布胶水量的在线测控和数字显示,有效地提高涂附磨具生产线的生产效率和产品质量.     

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.     

Limits of topographic measurement by the scanning tunnelling and atomic force microscopes

Parameters describing the topographic character of a surface (height, surface wavelength, slope and curvature) can be derived from equivalent sinusoidal profiles. The response of a surface-measuring instrument may be modelled in terms of instrument parameters such as stylus radius, and scanning range and resolution. The performance of the instrument may then be mapped as a zone in amplitude-wavelength (AW) space to show the sinusoidal profiles it is capable of measuring. In a first-order analysis the STM and AFM are considered as equivalent to contact-stylus instruments with a notional stylus radius equal to the tip radius plus the gap. Comparisons between different instruments and types of instrument are readily made by mapping in AW space. The error arising from convolution of the sinusoidal profile with that of the finite tip may be quantified and plotted as contours in AW space.