液压电梯监督检验工作的探讨

从液压电梯使用条件、检测工作要求、特有的检测项目及方法等方面阐述了目前液压电梯检测工作所遇到的问题,并提出了相应的建议。     

探析自动扶梯防逆转保护装置的设置及检验

介绍了自动扶梯防逆转保护装置设置的国家标准要求和发生逆转的可能性;讨论了自动扶梯防逆转保护装置的设置方法和工作原理,并介绍了其检验方法。     

念好工程建设监理工作的基本经

从工程建设监理实践中,总结监理工作八条基本经验:质量监管是监理的根本任务;依法监理是监理的法律保障;图纸和技术标准是监理的基本依据;旁站巡视检验和协调是监理的好形式;先进技术设备是监理的好手段;艰苦奋斗是监理的好作风;学习和实践是提高监理水平的阶梯;反腐倡廉是监理的纪律保证。     

国内第一条真空灭弧室自动检测线的建立

应用工业工程的方法,对灭弧室成品检验进行了作业流程分析,概述了灭弧室自动检测线的建立过程,描述了灭弧室成品检验进行工业自动化改造的应用效果,提高检测效率3倍以上,降低劳动强度80%。     

新型市政排水检查井——沉管式检查井的研究

为解决长距离顶管施工和检查井设置距离的矛盾,对新型沉管式检查井进行研究。采用"F"型钢筋混凝土管作为检查井井筒,采用下沉式施工工艺完成井筒安装,井筒之间的连接采用楔形橡胶圈止水。井底采用人工掏挖施工工艺挖至已完成管道管底,适当破碎已施工完毕的管道,将排水管道钢筋和管井基础钢筋绑扎在一起,浇筑混凝土,完成联通。详细介绍了该沉管检查井的材料准备和施工流程。     

汽车轮毂加工和气密性检测工作站的设计

针对汽车轮毂机加工过程中定位困难、生产工序衔接不顺畅等问题,基于工业机器人设计了一种汽车轮毂加工和气密性检测工作站。根据轮毂生产工艺流程,构建适应生产节拍的工作站空间布局。通过SolidWorks软件创建工业机器人专用夹具,在仿真软件中创建相应组件,添加输入输出信号,并对信号属性进行连接,实现了这一工作站的仿真和优化。仿真结果表明,这一工作站能够优化汽车轮毂加工工序,提高生产效率。通过路径规划和碰撞监测,这一工作站还可以得到准确的工业机器人作业速度、电机功率、能耗等数据,进而提高生产过程的稳定性。     

Measurement of Ar to support technology for On-Site Inspection under the Comprehensive Nuclear-Test-BanTreaty

On-Site Inspection (OSI) is a key component of the verification regime for the Comprehensive Nuclear-Test-Ban Treaty (CTBT). Measurements of radionuclide isotopes created by an underground nuclear explosion are a valuable signature of a Treaty violation. Argon-37 is produced by neutron interaction with calcium in soil, ⁴⁰Ca(n,α)³⁷Ar. For OSI, the 35-day half-life of ³⁷Ar provides both high specific activity and sufficient time for completion of an inspection before decay limits sensitivity. This paper presents a low-background internal-source gas proportional counter with an ³⁷Ar measurement sensitivity level equivalent to 45 mBq/SCM in wholeair.     

PLC控制及网路传输海关快件查验系统简介

简介海关快件查验系统的组成、结构、配置及系统维护要求。     

Development of localization system using ultrasonic sensor for an underwater robot to survey narrow environment

This paper describes a localization system for a swimming robot to survey underwater narrow environments. In that environment, external sensors cannot be set up to localize the robot position, as there are many structures and the robot moves three-dimensionally. Therefore, the position needs to be calculated only by internal sensors. In this work, a new localization method based on map-matching is proposed, referring to cross-sectional shape data cut from a three-dimensional computer-aided design (CAD) data as an environmental map and structural shapes measured by a range sensor. As a range sensor, an ultrasonic sensor which is two-dimensional scanning-type was developed. The reflected signals of the ultrasonic sensor have some noise. Only structural shape data are extracted from the reflected signals. The image correlation is used as the matching method. Experiments to evaluate the performance of the proposed system were implemented at a mock-up environment. As a result, it was confirmed that the position was detected with an accuracy of 100 mm. The error is mainly caused by measurement error of the ultrasonic sensor that is used to calculate structural shapes. We concluded to improve the measurement accuracy of the ultrasonic sensor to reduce localization error.     

A structure database and its application: Maintenance Information Management System and Bridge Management System of Hanshin Expressway

For efficient management of various structures in a large highway network, systematic handling of data is essential since its volume has swollen over the years and it takes different forms such as diagrams and photos. The Maintenance Information Management System established by Hanshin Expressway Public Corporation (HEPC) is a computerized database and a processing and reference system of all bridge structure elements. As it is a comprehensive application, HEPC is also developing its own version of a bridge management system, which helps to plan annual budget allotments and work prioritization using the life cycle cost minimization rule. Both systems are tools to support a rational decision-making process of maintenance/repair programmes under the recent curtailed financial situation.