基于状态的设备维护--CBM技术研究

设备的监测和维护是保证设备正常运行、提高设备工作效率、延长设备使用寿命的主要手段。基于状态的设备维护(CBM)是新一代的设备监控与维护技术,介绍了一个标准化的CBM系统框架(OSA-CBM)。它基于分布式网络结构,采用当前流行的组件技术,同时定义了标准的功能模块和接口,有助于CBM系统的标准化和产业化。     

方家山核电工程核仪表系统改进

核仪表系统(RPN)是核电站重要的安全系统。秦山核电厂扩建项目(方家山核电工程)核仪表系统采用了基于Rolls-Royce Civil Nuclear的SPINLINE 3的数字化技术。与参考电站核仪表系统采用的模拟技术相比,数字技术从一定程度上精简了设备配置,简化了系统内、外部接口设计,提高了设备的在线自诊断能力,缩短了检修和维护时间,相应地提高了核电厂的可靠性和经济性。     

轨道交通智能化设备维护管理系统的设计与开发

提升轨道交通领域设备维护管理的综合能力,解决传统维护模式效率难以进一步提升的弊端是轨道交通领域内一个重大课题。介绍了轨道交通综合监控系统技术及应用,分析了现有设备维护管理体系的现状及存在问题,提出了建立一套基于综合监控平台的智能化设备维护管理系统,并深入探讨了系统结构、系统功能及实施建议,为轨道交通设备维护管理模式的发展方向带来新的构想。     

基于泄漏量的消防水泵可靠性评估

基于状态维修(CBM,Condition Based Maintenance)方法是预防性维修方法的一种,它以比例风险模型(PHM,Proportional Hazard Model)为基础,强调运行时间和实时状态对设备运行寿命的影响,通过设备运行的历史数据和实时运行状态来评估其可靠性。本文在PHM模型的基础上,利用灰色模型估计模型中风险度函数的相关参数,使之适应于消防水泵失效数据较少的情况,提出了适应小样本数据的设备状态评估方法。并以实际使用的消防水泵泄漏量作为计算状态量,采用CBM方法计算了水泵的可靠度、风险度,计算结果显示该方法能够评估设备的运行状态,并能优化设备维修策略,节约维修成本。     

关于征集全国暖通空调及净化设备标准化技术委员会单位委员及观察员的通知

<正>全国暖通空调及净化设备标准化技术委员会(SAC/TC143,以下简称全国暖通标委会)由国家质量技术监督检验检疫总局于1989年8月批准成立,是在建筑物内的供暖、通风、空调与制冷、净化设备及系统运行管理与节能评价领域(带制冷机的空调机、通用的风机、环境保护用的除尘、消烟设备以及交通运输和其他特殊场合用的暖通空调净化设备不属该技术委员会的工作范围)从事全国性标准化业务的技术工作组织,并由国家标准化管理委员会委托住房和城乡建设部领导     

NB-IoT下行链路关键技术分析与性能仿真

物联网技术是在互联网基础上延伸与扩展的一种网络,与传统无线移动通信最大的扩展在于其面向海量的低功耗、低成本设备之间的连接。窄带物联网技术(Narraw Band Internet of Things,NB-IoT)是第三代合作伙伴计划(Third Generation Partnership Project,3GPP)基于第四代移动通信系统演进推出的移动物联网(Mobile Intenet of Things,MIoT)标准,其展现了良好的传输性能和低廉的部署成本,在国际标准化和商业化进程中逐渐形成称为统一标准的趋势。目前,NB-IoT系统的芯片、模组和设备的开发正在快速推进,急需配套的软件仿真平台,为硬件和芯片开发测试提供基线。本文对第三代合作伙伴计划NB-IoT协议中的下行链路及其涉及到的关键技术进行分析,并基于Matlab搭建仿真平台,为芯片和模组等硬件开发流程提供便利的参考。     

杭州天健流体控制设备有限公司诚聘英才

杭州天健水务是一家综合发展型企业,下设杭州天健流体控制设备有限公司(简称天健控制)、杭州天勤水处理技术有限公司(简称天勤技术),主要致力于市政供水、市政污水及电镀工业废水等领域项目的技术服务。其中,天健控制是浙江省首家运行维护服务企业,是集自控仪表维护服务、设备代理销售总包、系统方案     

《空调通风系统清洗规范》

为了规范空调通风系统的清洗 ,防止空调系统或通风系统清洗工程有可能造成的二次污染 ,以及污染物在清洗中的扩散 ,国家标准化管理委员会 2 0 0 3年 5月紧急下达了制定《空调通风系统清洗规范》国家标准的任务 ,并把该标准纳入了加强与防治SARS相关技术标准工作之内。《空调通风系统清洗规范》(GB 192 10 2 0 0 3)由中国标准化研究院、北京工业大学提出 ,中国标准化研究院、北京工业大学、全国暖通空调及净化设备标准化技术委员会、军事医学科学院、全国冷冻设备标准化技术委员会、蓝星清洗工程有限公司共同起草。该标准已经于 2 0 0 3年…     

集中供热系统水处理设施的维护及新技术

对供热系统水处理设施中水过滤器、钠离子交换器(软化设备)的维护工作要点进行分析,对电磁法软化水技术进行了探讨。     

某地下车库内部设备计算机智能管理系统设计

随着电子技术的飞速发展,智能建筑(又称楼宇自动化、BA系统)技术已日益成熟,在地面建筑得到广泛的应用,针对大型地下车库内部设备繁多、能耗大和维护管理投入大的特点,结合实际工程开发了大型地下车库内部设备计算机智能管理系统,将计算机技术引入工程内部的设备管理,节约了工程的维护能耗和管理费用,提高了工程的维护管理水平。     

RFID-based building maintenance system

Information technology applications have proven effective in the maintenance of constructed facilities. The objective of the study is to enhance building maintenance using Radio Frequency Identification (RFID) technology. A data management module is first developed to collect building usage and maintenance data. A statistical module is then established to graphically display the collected data. To ensure that building functions perform normally, maintenance activities are arranged using a scheduling module. These three modules are integrated into a web-based RFID building maintenance system. System performance is validated using a real building. Experimental results show that integrating RFID technology with a web-based system, database, and scheduling theory can improve facility and equipment maintenance efficiency.     

基于C/S模式的智能建筑用电设备监控系统设计

针对智能建筑中的设备监控与节能减排问题,为有效地管理建筑物的用电设备,达到节能控制效果,以建筑物中用电设备为对象,设计了一种基于C/S模式的远程监控系统。该监控软件使用了VS开发平台C#编程技术,运用TCP/IP通信技术,实现远程控制用电设备的开启或关闭,以及档位调节。客户端软件能显示用电设备的实时运行状态,有效解决了传统用电设备管理和维护的效率不高的问题。监控系统具有控制功能可靠、实时性强、操作简单的特点,适合于现代智能建筑运维管理。     

A comparative study of time-based maintenance and condition-based maintenance for optimal choice of maintenance policy

Cost-effective maintenance of infrastructure systems within an acceptable level of safety and performance is the major concern of managing agencies. Recent maintenance approaches have offered two distinct maintenance policies: time-based maintenance (TBM) and condition-based maintenance (CBM). This paper compares the two policies under different cost environments for stochastically deteriorating infrastructures. The performance of TBM and CBM is evaluated from the viewpoint of condition transition and life cycle cost. We found the optimal maintenance solutions for TBM and CBM using dynamic programming and performed a simulation study. The simulation study showed that TBM causes some unexpected deterioration that leads to high cost, while CBM maintains a certain level of condition steadily under consistent inspection, which enables steady spending at the management level. The life cycle cost under CBM is relatively symmetric and has a more concentrated distribution than TBM, which has a large number of outliers from unexpected deteriorations. Finally, we evaluated the life cycle cost with a change in the inspection–repair cost ratio to find the most appropriate cost environment for each maintenance policy. While CBM needs periodic inspections, it still has more advantages than TBM when the inspection cost is relatively low.     

现代化企业的设备管理系统

随着物联网技术的发展,越来越多设备具备云接入能力和远程管理能力。现代化企业的设备管理需要的不仅是简单的设备台帐记录系统,而是对设备的使用状态、运行情况实施监控的综合设备管理平台。同时,随着移动互联网的成熟,人们的工作方式更多倾向于手机操作。本文建立基于云接入能力的综合管理设备系统,在传统的设备台帐管理功能基础上,提升设备远程管理能力和移动管理特性。设备系统实时反应设备的运转状况、使用情况,为设备管理提供实时数据参考,整体提升企业设备运维能力。     

Utilization analysis methodology for fleet telematics of heavy earthwork equipment

Fleet telematics aims to comprehensively control equipment groups through location tracking, maintenance control, and productivity monitoring of individual equipment based on real-time location and status transmitted to fleet control center from the equipment. Logistics industry, automobile industry, as well as transportation (land, sea, and air) industry are actively applying fleet telematics in order to efficiently and safely operate multiple groups of equipment. Earthwork, a basic operation for any type of construction, depends heavily on equipment. The productivity and safety of earthwork equipment are decided by effective management of the equipment. Therefore, fleet telematics can also improve the earthwork operation as well. The goal of this research is to develop a GPS only-based fleet telematics system for heavy earthwork equipment which can analyze time log information of each equipment using GPS location data without utilizing any other on-board sensors and CAN bus data. The earthwork site (loading and dumping area) and moving route, hazardous areas of the project are all visualized on a map via geo-fencing technology considering the characteristics of earthwork operation. Lastly, algorithms to analyze the utilization time of earthwork equipment using GPS location information are designed and their reliability are verified through field tests.     

基于BIM的机电设备应急管理系统总体设计

对于大型商业和公共建筑物,机电设备的正常运作是物业管理的基本要求,但机电设备故障是无法避免的事实,一旦发生机电设备出现问题,如何快速确定故障点,并能快速处理事故,是大型商业和公共建筑物机电设备应急管理必须解决的问题。本文介绍基于BIM技术的建筑机电设备应急管理系统技术实现方法选择和总体设计。     

捣固技术的引进及其应用

论述了引进德国捣固技术与设备的概况、捣固技术的关键、设备运行情况、设备维护与技术革新,总结了引进捣固技术的效果。     

Developing mobile 2D barcode/RFID-based maintenance management system

Effective maintenance management can be extremely difficult owing to various types of equipment and instruments in a construction lab. These equipment and instruments are required to provide a high level of precision and accuracy in their tests. Usually, maintenance staff will make hard copy records of inspections and maintenance results in a construction lab. Consequently, there are often difficulties in accessing information and data re-entry problems during the maintenance process. By using 2D barcode and Radio Frequency Identification (RFID) technologies, this study presents a novel system called Mobile 2D Barcode/RFID-based Maintenance Management (M-BRMM) system to improve lab equipment and instrument maintenance management and provides a maintenance information sharing platform. Integrating promising information technologies such as smart phones and RFID-enabled PDAs, the M-BRMM is then applied in a construction lab in Taiwan to verify our proposed methodology and demonstrates improvements to the maintenance process in a construction lab.     

Building evaluation methodology for setting maintenance priorities in hospital buildings

Condition‐Based Maintenance (CBM) is a common solution for the maintenance of large complex facilities under tight economic conditions. Effective implementation of CBM requires the development of performance indicators for building components and systems. The objectives of the proposed methodology are: (1) to monitor the condition of building components, based on systematic performance scales; (2) to develop a parameter that ensures clear detection of building elements that are in failing condition; and (3) to provide a Key Performance Indicator, based on a unified scale, for the comparison of the performance of different buildings. Two rating scales are used: one for the individual components (P_n ) and a second for the entire building – the Building Performance Indicator (BPI). The first scale combines criteria regarding the physical state, performance, fitness for use, and preventive maintenance of various building components. The second scale, the BPI, is a 100‐point scale that covers 10 of the building's main systems. The proposed methodology was implemented in 17 public health care facilities in Israel. The survey results show that the overall state of the facilities is that of deterioration (BPI = 68.9). One building system, the communication and low voltage system, was consistently found to be in poor condition (P_n = 39.4), four systems (exterior envelope, interior finishing, water and waste‐water, and HVAC) were in deteriorating condition (60d ≤ P_n < 70), and five were in satisfactory or higher condition. Validity of the methodology was tested by means of a survey executed by 14 trained surveyors on the same facility. The variance of the results was relatively slight.