一种全新概念的数字式汽车衡

现有的数字式汽车衡其仪表通过RS422/RS485串行总线与传感器相连,所有传感器并接在这根总线上,各传感器要有单独的地址码,存在很多不足。采用作者发明的"智能终端间数据并行传输的方法和装置",将仪表与传感器之间的连接由总线改为专线,将原接线盒改为主控机,仪表改为操控终端,克服了原系统的所有问题,杜绝了误判、误报的可能,提高了系统的采集速率,让动态数字秤成为可能,真正实现数字秤的傻瓜型安装和维护。     

数字接线盒在称重系统中的应用

利用数字化技术,将数字接线盒代替模拟接线盒,不仅能提高称重计量准确度,而且具有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、系统自诊断和能及时确认传感器故障等特点.     

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.     

基于非正交频分复用的智能电管家数据传输系统设计

提出一种基于非正交频分复用的智能电管家数据传输系统设计。通过 PCIE 内部结构的程序控制数据流的方向,来划分系统的读操作预计写操作研究。根据预处理操作降低数据传输偏差;利用非正交频分复用技术的子载波调制信号,来提升频率利用率和降低系统数据传输偏差。通过设备采集,得到数据类型选择其对应的大体数据传输方式;利用椭圆曲线密码学与高级加密标准抵御智能电管家数据篡改攻击,运用加密反向操作和认证签名解密密文维护数据安全,从而实现智能电管家数据安全传输。仿真结果表明,所建系统数据传输时效性强、吞吐量高且丢包率低,具备极强的实用性,深入优化了智能电管家系统的推广及应用。     

两线制电容式数字液位传感器研制

电容传感器在液位测量领域应用广泛,但在实际应用中,常会因被测介质和测量范围的不同需要现场校准传感器.为简化校准方法,设计了以PICl6F684单片机为核心的数字液位传感器.该传感器采用模拟校准和数字校准2种方式.出厂前进行模拟校准,以确定量程.现场安装时进行数字校准,通过对2个有较大差值的不同液位的实测,对传感器的零点和放大倍数进行修正,以确保液位传感器的精度.传感器采用AD421构成两线制4～20 mA电流信号输出,方便与现有仪表或微机系统等配合使用.     

GUD500顶板位移传感器的研制及应用

简述了GUD500位移传感器的主要技术指标,从主机和位移探头两方面对传感器结构特征进行了介绍,并通过框图形式对传感器工作原理进行了详细讲解;最后,对传感器在巷道顶板的安装步骤和使用注意事项进行了详细介绍。工业性试验表明,该传感器结构简单、安装方便、数据传输稳定,为系统进行顶板监测提供了实时可靠的数据。     

一种汽车锂电池监控系统的设计与实现

提出一种汽车锂电池监控系统的设计。系统设计了电池检测传感器模块、电池模组电路模块和电池修复电路模块。电池检测传感器模块对电池模组监测,并通过CAN总线将数据传输给控制器,而控制器将数据打包处理后通过V2X通讯模块上报给云服务器,最终通过V2X通讯模块反馈预处理计划指令到控制器实现汽车锂电池的智能监控及健康守护。系统简洁、运行稳定,可以有效减少因电池性能下降导致电池短路、电池热失控的现象发生。     

位移传感器在轧机液压压下缸中安装结构的改进

位移传感器的安装结构是否合理直接影响着轧机液压辊缝控制系统的分辨率、控制精度、响应时间和维护。本文探讨了位移传感器几种不同的安装方式,并通过大科六辊轧机位移传感器的安装结构说明了内装位移传感器的优越性。     

GCS-200无基坑轨垫式数字轨道衡

本文介绍了一种有别于采用传统方式实现计量的新型轨道衡,它采用板式纯数字传感器作为核心力电转换元件、配有液压自校验装置、按无基坑方式施工安装。它具有计量准确度高、抗干扰能力强、防作弊、数据远距离传输以及使用维护简便的等优点。     

冷却系统的炉底称重装置简介

电炉炼钢以其精度高、安装简便、易操作等优势被炼钢企业大大推广运用,目前市场普遍应用的电炉炼钢存在精度低、称重传感器易坏,冷却调心系统缺少等缺陷。为炼钢企业带来的困扰,本公司多次走访客户市场,多方考察,研发设计了一款高精度、冷却系统良好、有电炉调心功能且安装简单、易维护的高温型炉底电子秤。     

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.