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火电厂一次风监测系统的设计
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作者 吕杜鹃 李华 《电脑与电子》 2000年第6期47-48,共2页
通过研华工控组态软件GENIE和研华的ADAM模块有效结合应用可以设计出一套功能强大监测系统。
关键词 火电厂 一次风监测系统 设计 组态 ADAM
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DZY-I仪表在电厂一次风监测系统中的应用
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作者 白学林 《电力学报》 2000年第3期195-197,共3页
介绍了风道参数测量仪在燃煤机组锅炉一次风监测系统中的应用 ,叙述了风道参数测量仪的工作原理、性能。
关键词 锅炉 一次风监测系统 道参数测量仪 DZY-I
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高速铁路风监测系统布点间距加密方案研究 被引量:2
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作者 杜广宇 《铁道建筑》 北大核心 2021年第4期160-163,共4页
为提高大风报警条件下高速铁路列车运行效率,须在已运营的铁路风监测系统中新增风监测点。本文分析了风监测点加密对提高列车运行效率的可行性和适用条件,给出了现场风监测点加密的基本原则,并提出了一种基于风速报警数据关联分析的风... 为提高大风报警条件下高速铁路列车运行效率,须在已运营的铁路风监测系统中新增风监测点。本文分析了风监测点加密对提高列车运行效率的可行性和适用条件,给出了现场风监测点加密的基本原则,并提出了一种基于风速报警数据关联分析的风监测点加密算法,确定了候选加密点的判别依据。利用该方法,首先根据一定时间的风监测数据找出风速频繁报警的监测点和大风报警累计时间较长的点,然后计算相邻风监测点的关联系数,优先选择关联系数小的点增加风监测点。增加风监测点时风速计具体安装位置应根据线路条件和地形地貌实际情况确定。 展开更多
关键词 高速铁路 布点加密 理论分析 风监测系统 关联分析 速报警 气象尺度
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火电厂一次风监测系统的设计
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作者 李华 吕杜鹃 方强 《东北电力技术》 2001年第2期7-8,共2页
通过研华工控组态软件GENIE和研华的ADAM模块有效结合应用可以设计一套功能强大的监测系统
关键词 火电厂 一次风监测系统 设计 锅炉 工控组态软件 ADAM模块
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风电场中央监控及远程监测系统的研究与设计 被引量:3
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作者 刘彬 《广西电力》 2013年第1期87-90,共4页
研究国内风电场监控及远程监测系统的实际情况和存在问题,为风电场中央监控及远程监测系统的开发和建设提供指导。采用风电场的IEC61400-25标准进行系统建模,利用VS.NET开发工具,进行风电场中央监控及远程监测系统设计开发。从风电场的... 研究国内风电场监控及远程监测系统的实际情况和存在问题,为风电场中央监控及远程监测系统的开发和建设提供指导。采用风电场的IEC61400-25标准进行系统建模,利用VS.NET开发工具,进行风电场中央监控及远程监测系统设计开发。从风电场的通信组网模式、风电场中央监控及远程监测系统的系统拓扑构到风电场监控系统的功能需求、数据分析统计功能,提供了一套完整的解决方案。风电场中央监控及远程监测系统需要像电网监控系统一样系统化、规范化、行业化。 展开更多
关键词 网络拓扑 电场中央监控系统 电场远程监测系统
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基于长期监测数据的某悬索桥桥位近处风场特性分析 被引量:8
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作者 胡俊 欧进萍 《中南大学学报(自然科学版)》 EI CAS CSCD 北大核心 2013年第7期2989-2996,共8页
为了对大桥抗风评估提供可靠依据,结合东海某大跨度悬索桥的风场监测系统,对该桥桥面及桥塔处的风速进行长期监测,采用统计方法及频谱分析对桥位处风速随高度变化、湍流强度、阵风因子以及脉动风的功率谱密度等进行分析。研究结果表明:... 为了对大桥抗风评估提供可靠依据,结合东海某大跨度悬索桥的风场监测系统,对该桥桥面及桥塔处的风速进行长期监测,采用统计方法及频谱分析对桥位处风速随高度变化、湍流强度、阵风因子以及脉动风的功率谱密度等进行分析。研究结果表明:无量纲幂指数在低风速时较不稳定,随风速增大而减小并趋于平稳,高风速下其统计均值为0.161,大于规范建议值;湍流强度亦随风速增大而减小并趋于平稳,可采用指数函数加以拟合,桥面高度处强风的顺风向、横风向及竖向湍流强度均值分别为0.180 6,0.156 4及0.078 7,亦大于规范建议值;阵风因子与湍流强度之间近似呈线性关系;强风的水平及竖向风谱与规范谱吻合较好,但实测谱值在低频段偏低。 展开更多
关键词 悬索桥 脉动 监测系统 现场实测
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Measurement of wind field characteristics at a long-span suspension bridge 被引量:6
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作者 胡俊 郭健 欧进萍 《Journal of Southeast University(English Edition)》 EI CAS 2011年第3期328-334,共7页
In order to provide a reliable basis for wind resistant evaluation of a long-span suspension bridge, a structural health monitoring system is installed on a bridge in the East China Sea and the simultaneous wind data ... In order to provide a reliable basis for wind resistant evaluation of a long-span suspension bridge, a structural health monitoring system is installed on a bridge in the East China Sea and the simultaneous wind data at the bridge deck and at the top of the bridge tower are recorded. The average wind speeds and directions, variations of wind speeds with height, turbulent characteristics, spatial correlation and characteristics of wind flow around the bridge deck are analyzed by using statistical methods and spectral analysis. It is found that the average wind speeds along the bridge girder are almost identical; however, the mean wind directions vary greatly at different locations. The dimensionless exponent decreases as the average wind speed increases. The measured turbulence intensities are greater than the recommended values, and the turbulence power spectrum can well fit the standard spectrum. However, the measured spectral values are considerably smaller in low frequency ranges. The mean wind speed of the wake flow decreases and the turbulence intensity increases significantly, and the spectral characteristics of the wake flow change obviously while the feature frequency of vortex shedding has not yet been observed. 展开更多
关键词 suspension bridge wind field structural health monitoring system field measurement
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Comparable study on typhoon and strong northern wind characteristics of the Runyang Suspension Bridge based on field tests 被引量:4
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作者 王浩 李爱群 +2 位作者 郭彤 谢静 胡若玫 《Journal of Southeast University(English Edition)》 EI CAS 2009年第1期99-103,共5页
The strong wind characteristics of the Runyang Suspension Bridge( RSB) including the wind speed and direction, the turbulence intensity, the turbulence integral length and power spectrum are analyzed based on measur... The strong wind characteristics of the Runyang Suspension Bridge( RSB) including the wind speed and direction, the turbulence intensity, the turbulence integral length and power spectrum are analyzed based on measurement data from the wind environment monitoring subsystem of the structural health monitoring system (SHMS)of the RSB and field tests during strong winds. The differences between the typhoon and the strong northern wind are especially studied. It is found that the mean wind speed of the strong northern wind is a little smaller and the mean wind direction is more stable than that of the typhoon. The turbulence intensity of both the typhoon and the strong northern wind is greater than the values suggested in Chinese code, and the turbulence integral length difference between the typhoon and a strong northern wind is not clear. As for the along-wind turbulence power spectrum, the spectrum of the strong northern wind can fit the Kaimal spectrum better than that of the typhoon. The obtained results can provide measurement data for founding a strong wind characteristic database and determining the strong wind characteristic parameter values of the RSB. 展开更多
关键词 suspension bridge TYPHOON northern wind wind characteristics field test structural health monitoring system
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Research on an active and continuous monitoring system for human respiratory system 被引量:2
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作者 于莲芝 Yan Guozheng +1 位作者 Zhang Wenqiang Wang Xiangrui 《High Technology Letters》 EI CAS 2006年第1期68-71,共4页
Continuous and dynamic measurements of human respiratory parameters are very important for vital diseases of respiratory system during mechanical ventilation. This paper analyzed the structure and mechanical propertie... Continuous and dynamic measurements of human respiratory parameters are very important for vital diseases of respiratory system during mechanical ventilation. This paper analyzed the structure and mechanical properties of the human respiratory system, and designed an active intervening monitoring micro system for it. The mobile mechanism of the micro system is soft and earthworm-like movement actuated by pneumatic rubber actuator, the measurement and therapy unit of the system is an extensible mechanism with sensors in the front. The micro monitoring system can move in respiratory tract and measure the respiratory parameters in bronchium continuously. Experiments had been done in swine's respiratory tract, the results proved that the micro robot system could measure the respiratory parameters in real-time successfully and its movement was smith in swine's respiratory tract. 展开更多
关键词 respiratory system monitoring system mechanical ventilation MEASUREMENT
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Real-time Diesel Particulate Matter ambient monitoring in underground mines
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作者 Gillies A D S 《Journal of Coal Science & Engineering(China)》 2011年第3期225-231,共7页
A real-time Diesel Particulate Matter (DPM) monitor has been developed on the base of the successful National In- stitute of Occupational Health and Safety (NIOSH) designed Personal Dust Monitor (PDM) unit. The ... A real-time Diesel Particulate Matter (DPM) monitor has been developed on the base of the successful National In- stitute of Occupational Health and Safety (NIOSH) designed Personal Dust Monitor (PDM) unit. The objectives of a recently completed Australian Coal Association Research Program (ACARP) study was to modify the PDM to measure the submicrometre fraction of the aerosol in a real-time monitoring underground instrument. Mine testing focused on use of the monitor in engineering evaluations of Longwall (LW) moves demonstrated how DPM concentrations from vehicles fluctuate under varying ventilation and operational conditions. The strong influence of mine ventilation systems is reviewed. Correlation between the current SKC DPM measurement system and real-time DPM monitors were conducted and results from eight mines show a correlation between elemental carbon (EC) and the new monitor DPM mass ranging from 0.45 to 0.82 with R2〉0.86 in all but two cases. This differences in suspected to be due to variations from mine to mine in aspects such as mine atmospheric contamination, vehicle fleet variations, fuel type, engine maintenance, engine combustion efficiency, engine behavior or interference from other submicrometre aerosol. Real-time monitoring clearly reflects the movement of individual diesel vehicles and allows pin-pointing of high exposure zones such as those encountered where various vehicles engage in intense work in areas of constrained or difficult ventilation. DPM shift average monitoring approaches do not readily allow successful engineering evaluation exercises to determine acceptability of pollution levels. Identification of high DPM concentration zones allows efficient modification of mine ventilation, operator positioning and other work practices to reduce miners' exposures without waiting for laboratory analysis results. 展开更多
关键词 real-time diesel particulate matter total carbon elemental carbon
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Hazard Model Reliability Analysis Based on a Wind Generator Condition Monitoring System
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作者 Khaled Abdusamad David Wenzhong Gao +1 位作者 Xiaodong Liang Jun Zhang 《Journal of Energy and Power Engineering》 2014年第7期1309-1322,共14页
This paper presents an application of the hazard model reliability analysis on wind generators, based on a condition monitoring system. The hazard model techniques are most widely used in the statistical analysis of t... This paper presents an application of the hazard model reliability analysis on wind generators, based on a condition monitoring system. The hazard model techniques are most widely used in the statistical analysis of the electric machine's lifetime data. The model can be utilized to perform appropriate maintenance decision-making based on the evaluation of the mean time to failures that occur on the wind generators due to high temperatures. The knowledge of the condition monitoring system is used to estimate the hazard failure, and survival rates, which allows the preventive maintenance approach to be performed accurately. A case study is presented to demonstrate the adequacy of the proposed method based on the condition monitoring data for two wind turbines. Such data are representative in the generator temperatures with respect to the expended operating hours of the selected wind turbines. In this context, the influence of the generator temperatures on the lifetime of the generators can be determined. The results of the study can be used to develop the predetermined maintenance program, which significantly reduces the maintenance and operation costs. 展开更多
关键词 Hazard model failure rate survival rate mean time to failure weibull distribution generator age generator temperature.
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