共查询到20条相似文献,搜索用时 93 毫秒
1.
2.
3.
4.
回顾了设备状态监测与故障诊断技术的发展过程,讨论了舰船机械设备远程故障诊断系统应具有的功能,提出了该系统的体系结构,运行模式,并简述了建立该系统所涉及的一些关键技术。 相似文献
5.
介绍了基于资源节点的设备监测诊断系统.该系统提供了一种设备监测诊断系统的开放式、可灵活集成的组建模式.它利用Web Services,Netmeeting和计算机网络等技术,有效地挖掘和利用网络中的各种技术资源、信息资源和专家资源,发挥了网络信息交换和资源共享的优点. 相似文献
6.
7.
离心压缩机组远程监测与诊断系统的研制与应用 总被引:1,自引:1,他引:0
适应现代网络技术和分布式大型关键设备远程监视诊断的需要 ,研究开发了基于网络技术的设备远程分布式监视诊断系统。本文详细介绍该系统网络结构、基本构成、实现方法、软件模块和模块功能等。现场应用表明其具有较强的实用价值和广阔的应用前景 相似文献
8.
汽车发动机远程故障诊断数据库系统设计分析 总被引:2,自引:0,他引:2
利用数据库技术建立汽车发动机远程故障诊断系统,重点分析了远程故障诊断中心发动机诊断数据库和标准数据库等的设计思路,介绍了系统的结构模型、数据库访问、数据库实现、数据库安全等技术,对汽车发动机故障远程诊断系统的建立和开发具有指导意义. 相似文献
9.
喻涛 《中国新技术新产品》2013,(8)
汽车维修保障进入远程故障诊断与交互式电子技术手册应用阶段。应用嵌入式监测诊断系统,能监测电子控制系统的传感器、执行器、ECU及有关电路的运行状况。本文就汽车检测技术的改进作了一些简要论述。 相似文献
10.
11.
介绍了某乡村酒店空调设计,对客房空调系统提出了集中空调、多联空调、单元式空调三个方案,通过空调运行季节的运行费用及设备初投资进行15年本息合算的综合费用比较,显示单元式空调方案是初投资最少,综合费用最省的方案;对单元式空调方案存在外观问题的解决和优化设计;对真实能耗问题进行了剖析。指出空调系统的设计节能与否不仅需考虑设备标配的能效比,还要考虑系统的实际运行及使用情况,以达到设计成果实际节能及综合费用最省的目的。 相似文献
12.
The electrical test system is one of the key components in semiconductor assembly and test factories. The products arrive at the system in lots and the processing times in the system are related to lot size. In the system, defective lots are identified by the tester machine and then analysed by engineers. The defective lots are subsequently reworked in the tester, forming a re-entrance system. This paper analyses system performance with respect to quality rate and system design parameters to provide suggestions for system improvement. A queue network model based on a semiconductor electrical test procedure is constructed, and system performance is obtained by the Markov method. The performance forecast, quality sensitivity analysis, and system improvement for a case study carried out in a factory are described in detail. The results show that the proposed method is valuable for system performance evaluation and improvement. 相似文献
13.
14.
15.
为研究有限时间内热力系统换热量与热源温度对系统性能的影响及太阳能辅助燃煤发电系统集成的理论基础,对有限时间热力系统中热机输出功率和效率与循环参数的关系表达式进行了改进,并结合太阳能辅助燃煤系统案例讨论了各参数的意义及其对系统性能的影响,为系统参数的调整方向提供参考。结果表明,500和1 000 MW燃煤发电机组在系统设计上比较合理,输出效率都在C-A效率与理想循环效率之间,集成后的系统效率有所降低,1 000 MW集成系统在节煤模式下系统性能恶化,效率低于C-A效率,需要对系统过程进行改进。200 MW燃煤发电系统在集成前后效率都低于C-A效率,表明系统过程需要较大改进。 相似文献
16.
针对全断面硬岩隧道掘进机(hard rock tunnel boring machine,简称TBM)在撑靴以设定压力撑紧围岩后支撑推进系统存在较大流量损失的问题,设计出一种具有负载敏感、恒压控制和蓄能器辅助支撑功能的支撑推进(简称LSCPGT)系统。利用AMESim软件搭建了LSCPGT系统模型,仿真分析了LSDRGT系统在变推进负载下的压力流量响应,并对比分析了在支撑工况下LSCPGT系统和恒压控制泵型支撑(constant pressure gripper,CPG)系统,以及在推进工况下LSCPGT系统与负载敏感泵型推进(load-sensing thrust,LST)系统和定量泵型推进(ration thrust,RT)系统的压力流量响应.结果表明:LST系统和LSCPGT系统在推进过程中都没有流量损失;CPG系统在支撑工况下存在流量损失,而LSCPGT系统由于蓄能器的保压作用没有流量损失;相对于LST系统+CPG系统的支撑推进系统,LSCPGT系统在撑靴达到设定压力后效率至少可提高43.5%。所设计的LSCPGT系统在满足支撑推进要求的同时,避免了流量损失,具有较好的节能效果。 相似文献
17.
Passakorn Srisastra Satha Aphornratana Thanarath Sriveerakul 《International Journal of Refrigeration》2008,31(5):921-929
This paper proposed a workless-generator-feeding (WGF) system for a jet refrigeration cycle, using R141b. This feeding system does not require any mechanical power. The liquid refrigerant from the condenser was fed to the vapour-generator by means of the generator pressure and gravitational force. The system was tested and compared with a conventional system using a mechanical pump. It was found that this system was workable. The heat input to the generator was slightly higher than that for a system using a mechanical pump. The jet refrigeration cycle employing this new feeding system provided a slightly lower coefficient of performance (COP) compared to a system using a mechanical pump. However, this new system did not require any mechanical energy. Therefore, the jet refrigeration system employing this WGF system is truly a heat-power refrigeration cycle. 相似文献
18.
By combining the artificial neural network with the rule reasoning expert system,an expert diagnosing system for a rotation mechanism was established.This expert system takes advantage of both a neural network and a rule reasoning expert system;it can also make use of all kinds of knowledge in the repository to diagnose the fault with the positive and negative mixing reasoning mode.The binary system was adopted to denote all kinds of fault in a rotation mechanism.The neural networks were trained with a random parallel algorithm (Alopex).The expert system overcomes the self-learning difficulty of the rule reasoning expert system and the shortcoming of poor system control of the neural network.The expert system developed in this paper has power ful diagnosing ability. 相似文献
19.