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随着我国高速公路建设项目不断增多,建设的规模越来越大,高速公路隧道耗电已经成为一个越来越明显的问题,主要表现为运营过程中电能的消耗浪费现象非常严重。在隧道照明营运中为了节约电能,以至于行车安全隧道监控同隧道照明之间发生冲突。因此,采用新技术实施隧道照明技术节能改造,一来可以有效降低能耗,二来可以降低电能成本、保证行车安全,从而提高高速公路的经济效益。 相似文献
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高速公路隧道照明PLC控制系统研究 总被引:1,自引:0,他引:1
文章通过研究高速公路隧道照明PLC控制系统的构成及控制方式,提出采用时间-亮度控制策略开发隧道照明监控系统,并通过在钦州至崇左高速公路中的应用实践,证明该系统能够满足隧道照明的要求,可在高速公路隧道项目中推广应用。 相似文献
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为降低我国高速公路隧道照明系统的能源消耗量,科学进行节能控制,对高速公路隧道照明系统进行分析,指出高速公路隧道照明节能控制方面存在的问题,并提出相应的节能控制措施,以期有效提高高速公路隧道照明的节能性,促进我国电气工程行业的发展。 相似文献
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隧道照明系统是影响行驶安全和舒适的重要因素,良好的照明环境是隧道运营安全的有力保障.然而隧道照明系统的电能消耗一般占隧道总电能消耗的70%以上,巨大的电费支出往往成为运营单位的重要负担.随着交通量的增加,隧道照明系统须进行亮度的提升,在提升亮度的同时必须考虑照明系统的智能化调控,以做到"按需照明",避免过度照明造成的无效电能消耗.本文针对某隧道的照明系统改造升级方案,通过数值模拟预估了其实施后的亮度水平,基于"按需照明"的理念,提出了降低电能消耗的技术方案和路线. 相似文献
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云南省公路开发投资有限责任公司 《交通节能与环保》2012,8(3):4-9
云南省高速公路具有隧道多、相对发达地区通行量较小的特点,同时存在使用农电、架设困难、电能质量差等问题。该项目依托相关科技项目支持,综合多项先进技术,设计的LED照明系统降低了照明功率;其采用的有源滤波技术,技术成熟,可有效抵消供电系统中产生的谐波干扰等问题,提高供电质量,保障系统安全;采用的车辆感应照明控制技术,减少了通行量较小时段的隧道照明电能消耗。 相似文献
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为了改善高速公路隧道照明资源浪费的问题,分析高速公路隧道照明综合节能技术的使用现状,重点介绍节能照明技术发挥的实际作用,并对相关技术应用时出现的问题提出相应的解决措施,希望能提高隧道照明节能技术的质量,为以后的公路工程施工提供参考。 相似文献
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Pedestrians as compared to vehicular traffic enjoy a high degree freedom of movement even in heavily congested areas. Consequently, there are more alternative links available to pedestrians between a given origin‐destination (O‐D) pair. This paper describes a study done by the University of Calgary to evaluate the factors affecting the choice of route on intra‐CBD trips or trips within the Central Business District (CBD). An origin destination survey conducted in downtown Calgary, Alberta enabled the identification of the most significant factors influencing the choice. These factors were analyzed in relation to the physical characteristics of the location, personal characteristics of the trip maker and the type of the trip. It appears that most people chose the shortest link and factors such as the level of congestion, safety or visual attractions were only secondary. This suggests that the length should be made a major consideration when planning and designing pedestrian links. 相似文献
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《Transportation Research Part A: General》1991,25(6):407-418
The main deficiency of most current modeling approaches to transportation can be identified as neglect of the integration of existing geographical knowledge in regard to the ex ante transport/land use modeling approaches, with its focus on territorial dynamics and theory development. This paper addresses this aspect of the problem by introducing a theoretical and methodological framework for the analysis of the interrelationship between land uses. The analysis attempts to determine to what extent the functional land use in a city can be considered an ordered pattern. The order sought does not rely on purely spatial configurations, but on the correlation of transportation and land use. The first section of this paper focuses on theoretical considerations. It stresses the fact that conventional approaches do not apply in the present context. It then suggests an alternative based on areas of influence and measured in terms of level of attractance of land uses. The second describes a procedure based on this alternative following the remarkable contribution of Hanjoul, Beguin and Thill. An application of this procedure to the analysis of Shanghai is then examined. Finally, an evaluation of the strategies for optimizing the interrelationship between land uses is presented. The paper concludes with a possible research agenda. 相似文献
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明确埋地管道防腐保温层的技术评价标准,对埋地钢质管道的安全运行,延长管道使用寿命具有重要意义。为了对埋地管道防腐保温层做出有效评价,从间接检测与开挖检测2个方面,结合现场检测数据,提出了基于防腐保温层的电流衰减率、绝缘电阻率、质量状况与厚度的分级评价标准及基于4种评价指标的综合评判方法。工程实践表明,该评价标准对防腐保温层是否存在失效能做出有效判断。 相似文献
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介绍了城市轨道交通工程中杂散电流不同的监测系统的构成,分析了集中式、分散式和智能型等监测系统的配置和功能,以及智能型实时在线监测系统的重要意义,为轨道交通工程杂散电流监测系统的选择与应用提供参考。 相似文献
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天然气自动计量系统有多种组态软件,由于软件的不相通性,造成了计量系统数据采集的通用性差、数据传输与入库的时效性差、数据利用的可靠性低.结合各组态软件的实际情况,从设计上充分利用Oracle大数据处理能力以及Partition(分区表)的特性,实现历史数据的存储,应用WebService与COM+数据访问组件提供多层数据访问架构,采用OPC与DDE工业数据交换协议,实现了各站场计量数据的实时上传,为连续数据采集和实时监控提供了可能,节约了改造成本. 相似文献
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Joseph N. Prashker 《Transportation》1979,8(4):329-346
Reliability of travel modes was found to be the most important characteristic of transportation systems in several attitudinal investigations of individual travel behavior. This paper represents the first part of a research effort aimed at gaining a better understanding of the characteristics of reliability of transportation modes in urban travel. In this research, reliability characteristics are identified; their importance relative to each other is assessed, and an insight into possible structure of an objective reliability index is discussed. The research is based on perceived values of reliability, which were identified through a large attitudinal survey conducted in the Chicago metropolitan area. 相似文献
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