车载散装水泥随车计量的两种方法

目的介绍了两种直接安装在经罐车上用来计量水泥罐中水尼重量的计量系统８，一种为应变式计量系统，另一种为超声波测距式系统。方法 安装计量系统时无需改动原车的支承结构。结果 系统达到的计量精度为６％。结论 计量系统结构简单、成本低廉、装配方便，尤其适合为无计量地磅的工地供应罐装水泥。     

智能车载散装水泥计量系统

本文介绍一种直接安装在水泥罐车上的计量水泥罐中水泥重量的计量系统。系统采用单片机，具有智能功能，使安装、调试、调零极为方便。这种系统尤其适合一罐水泥供应多个用户。     

六嘴回转式水泥自动包装机系统的研制

为改善水泥包装车间的包装环境,提高袋装水泥的计量精度,研制了六嘴回转式水泥自动包装机系统,本文重点讨论了该系统的基本工作原理、主机结构及电子式和机械式两种计量系统。     

关于电子皮带秤误差来源的分析

电子皮带秤作为一种动态连续计量仪表,影响其计量精度的因素很多.除了产品本身质量外,绝大部分影响因素均可通过提高安装、使用者的技术水平来减小或避免.文章详细阐述了影响皮带秤计量精度的主要因素及其解决办法,为皮带秤的安装及使用者提供参考.     

基于GPRS的远程电能计量装置检测系统的研究与应用

本文主要研究的课题是基于GPRS通讯技术,利用已安装负控终端的监控功能,建立一个在线监测电能计量装置的系统,实现对电能计量装置的远程检测和分析.实验结果表明本系统误判率低、工作效率高,是一种投入少、见效快的新的电能计量装置远程检测方法.本系统已在舟山市电力局实施,效益明显,具有很强的推广和实际使用价值.     

多功能分炉计量系统的自动化控制

详述一种采用工控机的分炉计量系统,具体介绍了系统的组成、工作原理以及软件设计。该系统由于功能强大且切合实际,在电力、煤碳、水泥等行业得到了广泛应用。     

一种新型联合站自动盘库系统

介绍了一种新型联合站自动盘库系统的组成、工作原理、功能特点、现场施工安装情况以及安装试应用等。实践证明,该系统性能优越,自动化和计量准确度高,具有良好的推广应用价值。     

建立能源计量监测系统助力水泥行业节能减排

一、建立水泥行业能源计量监测系统的必要性 水泥产业是我国国民经济建设的重要基础材料工业,也是主要的能源资源消耗和污染物排放行业之一.2011年全年规模以上水泥企业水泥产量达20.99亿吨,能源消耗总量约占全国能耗总量的5％,颗粒物排放量约占工业排放总量的30％左右.     

用涡街流量计测量蒸汽时的误差分析

本文介绍用涡街流量计测量蒸汽时的误差分析,包括蒸汽计量的系统介绍,蒸汽计量的系统管路安装情况及蒸汽计量的误差分析等.     

多功能电能表四象限无功设置应用分析

本文针对现场安装多功能电能表种类繁多,四象限无功计量方式设置不一,给抄核人员带来极大不便的现状,通过分析多功能电能表网象限无功计量方式与营销算费系统的关系,结合电力标准通讯规约等标准的规定,推荐一种通用的无功计量方式设置方式.并简单阐述了其实用意义,供行业借鉴.     

Usability criteria for intelligent driver assistance systems

Increasing numbers of intelligent driver assistance systems are now being installed in motor vehicles to support drivers. In order to ensure that the stress reduction benefits obtained from these systems are not nullified or even outweighed by new stresses at the vehicle's man-machine interfaces, the systems' control concepts must be designed to high ergonomic standards. This review seeks to identify design weaknesses in assistance systems by presenting criteria that must, on the one hand, be observed when designing the control concept of a new assistance system and, on the other hand, be applied when assessing the man-machine interfaces of assistance systems already installed in a vehicle. Currently available and future driver assistance systems are evaluated against recognized usability criteria, and their weak points are discussed.     

Conceptualizing tools for autonomous vehicle storage and retrieval systems

Autonomous vehicle storage and retrieval systems utilize rail-guided vehicles moving in rectilinear paths within and between the aisles of unit load storage racks. Vertical vehicle movement is provided by lifts installed at fixed locations along the rack periphery. As an alternative to traditional automated storage and retrieval systems, autonomous vehicle systems enable users to match vehicle fleet size and the number of lifts to the level of transactions demand in a storage system. Analytical conceptualizing tools based on the features of autonomous vehicle systems are proposed for modelling expected performance as a function of key system attributes including storage capacity, rack configuration and fleet size. The models are demonstrated for a sample problem and compared with analytical conceptualizing tools used for automated storage and retrieval systems.     

Vehicle deformation patterns in New Zealand road accidents

This paper presents partial results of a study undertaken by the University of Auckland in cooperation with the Ministry of Transport in New Zealand, into vehicle damage characteristics in typical road accidents. The overall objective of the study was to evaluate the likely effect of vehicle damage on child restraint systems installed in vehicles in common use on New Zealand roads. The results presented here, relate specifically to vehicle deformation and encroachment as recorded at the accident scenes by traffic officers over a 3 month period. It would appear from the results of the study involving 406 vehicles, that the likelihood of encroachment into the passenger compartment as a result of an accident, is considerably less for the centre back seat position. This confirms the widely accepted view that it represents the most desirable location for a child safety restraint system with regard to possible injury caused by vehicle deformation.     

Incorporating heterogeneous distance metrics within block layout design

This paper focuses on optimal design of block layouts when using more than one distance metric within a single facility. Previous work in block layout has assumed a single distance metric, usually the shortest rectilinear distance between department centroids, during the design step. However, most facilities have more than one method of material handling and alternative material handling systems can imply alternative distance metrics and cost structures. Specifically, up to three distance metrics within a single facility are considered--the shortest rectilinear distance between centroids (appropriate for automated guided vehicles and forklift trucks), the Tchebychev (maximum) distance (appropriate for overhead cranes) and the shortest Euclidean distance between centroids (appropriate for conveyor lines). Optimal block layouts using each of these distance metrics individually and then collectively are compared and contrasted. This approach can also be used to compare layouts when the choice of material handling system is not clear. It is argued that incorporating the distance metric that best reflects the planned material handling device is more realistic than previous formulations, avoids block layouts that are sub-optimal for the material handling systems installed, and is quite workable within a heuristic optimization framework.     

车辆传动系统热平衡计算与仿真研究

为准确设计车辆传动装置的冷却系统,提出了一个基于变速箱各档位热工况的统计使用频率加权平均的方法,进行传动系统的热平衡计算,并对车辆变速箱特定档位的温度分布采用数值方法进行了研究,以揭示变速箱热生成、热流分配和热平衡规律,改进的热平衡计算方法合理地反映了车辆传动系统在实际道路行驶过程中的热平衡状况,因而能够提出优化的冷却系统设计指标,而实现变速箱各档位热生成的准确计算则是这个新的传动系统热设计方法的应用基础。     

Metrological tests of navigation equipment for users of space navigation systems in motion

A new method is proposed for experimental accuracy evaluation of equipment for users of space navigation systems installed on moving vehicles. Examples of GPS-receiver test are provided. Translated from Izmeritel'naya Tekhnika, No. 7, pp. 41–43, July, 2000.     

直线电机列车-桥梁系统动力分析

根据架悬式和抱轴式两种电机安装方式特点的不同,推导了直线电机(LIM)列车车载电机与桥上感应板间的竖向电磁力的表达式,建立了用于进行LIM列车和桥梁振动分析的力学模型,重新定义了LIM车辆的脱轨系数和轮重减载率,并对这两种电机安装方式下的车桥系统动力特性的差别进行了讨论.以一座三跨(45.5 m + 65 m +45.5 m)连续刚构桥为工程实例,使用专门编制的计算机程序计算了LIM列车过桥时的列车-桥梁系统的耦合动力响应.计算结果显示,抱轴式LIM列车的运行安全性与平稳性要优于传统列车,具有优越的动力性能.     

面向LNG汽车的发动机排气与低温燃料温差发电器研究

为实现液化天然气（LNG）汽车的节能,提出了利用温差发电器（TEG）回收发动机排气（EG）的废热和低温燃料的冷能。指出了基于冷源所在的低温区,以及EG与LNG之间的大温差这两个特点,TEG的热电转换效率会高于常规。基于对小型LNG汽车中典型燃料系统的分析,设计了进行能量回收的两种系统流程,计算了其中各状态点的参数、及各换热器中布置温差发电器后的热电转换效率,得到了系统总的回收功率。结果表明,汽化器系统的回收功率大于自复温系统;在两种系统中,合理选取多种材料相较于仅用单种材料,TEG的回收功率更大。     

Map matching for intelligent speed adaptation

The availability of Global Navigation Satellite Systems (GNSS) enables sophisticated vehicle guidance and advisory systems such as Intelligent Speed Adaptation (ISA) systems. In ISA systems, it is essential to be able to position vehicles within a road network. Because digital road networks as well as GNSS positioning are often inaccurate, a technique known as map matching is needed that aims to use this inaccurate data for determining a vehicle?s real road-network position. Then, knowing this position, an ISA system can compare speed with the speed limit in effect and take measures against speeding. An on-line map-matching algorithm is presented with an extensive number of weighting parameters that allow better determination of a vehicle?s road network position. The algorithm uses certainty value to express its belief in the correctness of its results. The algorithm was designed and implemented to be used in the large scale ISA project `Spar pa? farten?. Using test data and data collected from project participants, the algorithm?s performance is evaluated. It is shown that the algorithm performs correctly 95% of the time and is capable of handling GNSS positioning errors in a conservative manner.     

两种悬置元件的对比试验研究

目的 为有效隔离某大功率军用柴油机的振动对车架及车体的影响。满足装车可靠性,要求合理选用高效减振装置以减少发动机的振动和噪声。方法 针对两种悬置元件－橡胶减振器和钢丝绳减振器,为预测装车后减振器的隔振性能和发动机的振动情况,分别对它们进行了静态特性、模拟装车后的动态特性和发动机台架振动烈度试验。结果 通过试验对两种悬置元件进行了对比、分析。结论 通过对比分析,初步估计采用钢丝绳减振器可以较橡胶减振