Optical Fibre Sensors最新文献_第3页

Fibre optic microsensor for measurement of temperature dynamics in gas turbine systems 用于燃气轮机系统温度动态测量的光纤微传感器

Optical Fibre Sensors Pub Date : 1998-06-18 DOI: 10.1117/12.309675

J. Kilpatrick, W. Macpherson, J. Barton, J. Jones, D. Buttsworth, T. Jones, K. Chana, J. S. Anderson

{"title":"Fibre optic microsensor for measurement of temperature dynamics in gas turbine systems","authors":"J. Kilpatrick, W. Macpherson, J. Barton, J. Jones, D. Buttsworth, T. Jones, K. Chana, J. S. Anderson","doi":"10.1117/12.309675","DOIUrl":"https://doi.org/10.1117/12.309675","url":null,"abstract":"The use of computational fluid dynamics (CFD) to model the temperature and pressure distributions which drive complex thermodynamic processes in gas turbine systems contributes to more cost efficient turbine design and development. However, experimental measurements are still required for validation of full-field CFD models, particularly in regions of highly unsteady flow where model stability is most severely tested. THis work concerns the development of fiber optic temperature and pressure microsensors for measurements combining high spatial resolution and high bandwidth in unsteady gas flows. The objective of the work presented in this paper was to measure gas total temperature in a large- scale turbomachinery test-rig at DERA Pyestock, known as the Isentropic Light Piston Facility. We have accordingly designed a dual sensor system, in which one of the elements is heated, so that gas total temperature can be measured independently of the convective heat transfer coefficient. While such dual element probes based on thin-film resistance gauges have been developed previously for aerodynamic studies, this is the first report of their development using optical sensors.","PeriodicalId":399876,"journal":{"name":"Optical Fibre Sensors","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125570970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Channeled spectrum interrogation of an all-fibre broadband interferometric differential strain sensor 全光纤宽带干涉差分应变传感器的通道频谱分析

Optical Fibre Sensors Pub Date : 1998-06-18 DOI: 10.1117/12.309667

J. G. Burnett, G. Erry, R. Dickson, R. McBride, M. Gander, J. Jones, P. Blanchard, A. Greenaway, A. R. Harvey

引用次数: 8

Recent developments in fibre optic sensors for point and distributed sensing in large structures 大型结构中点和分布式传感光纤传感器的最新进展

Optical Fibre Sensors Pub Date : 1998-06-18 DOI: 10.1117/12.309659

Y. Rao, N. E. Fisher, P. J. Henderson, V. Lecoeuche, C. Pannell, D. Webb, D. Jackson

引用次数: 3

Distributed temperature sensor (DTS) based on correlation technology 基于相关技术的分布式温度传感器

Optical Fibre Sensors Pub Date : 1998-06-18 DOI: 10.1117/12.309660

Zhang Bo

引用次数: 0

Design aspects of an alexandrite fluorescence lifetime fiber optic thermometer 翠绿宝石荧光寿命光纤温度计的设计

Optical Fibre Sensors Pub Date : 1998-06-18 DOI: 10.1117/12.309637

A. Kobe, A. Babnik, J. Mozina

引用次数: 1

Brillouin-based distributed fibre sensor incorporating a Brillouin laser 采用布里渊激光器的布里渊分布式光纤传感器

Optical Fibre Sensors Pub Date : 1998-06-18 DOI: 10.1117/12.309663

V. Lecoeuche, D. Webb, C. Pannell, D. Jackson

引用次数: 1

Optical fiber and integrated optics accelerometers for real-time vibration monitoring in harsh environments: in-lab and in-field characterization 用于恶劣环境下实时振动监测的光纤和集成光学加速度计:实验室和现场表征

Optical Fibre Sensors Pub Date : 1998-06-18 DOI: 10.1117/12.309678

J. López-Higuera, P. Mottier, A. Cobo, E. Ollier, Miguel A. Morante Rabago, C. Chabrol, Francisco J. Madruga Saavedra, P. Philippe

{"title":"Optical fiber and integrated optics accelerometers for real-time vibration monitoring in harsh environments: in-lab and in-field characterization","authors":"J. López-Higuera, P. Mottier, A. Cobo, E. Ollier, Miguel A. Morante Rabago, C. Chabrol, Francisco J. Madruga Saavedra, P. Philippe","doi":"10.1117/12.309678","DOIUrl":"https://doi.org/10.1117/12.309678","url":null,"abstract":"The reliability of rotating machines such as electrical generator is critical to the overall reliability and operation of electrical power plants. The very high cost of these machines, makes it necessary to improve the lifetime of a wide set of currently installed hydrogenerators around the world and avoid costly maintenance. Vibration monitoring is essential in maintenance and protection programs. However, due to the harsh environment and the very low frequency spectrum of the vibrations, the above mentioned machines cannot be appropriately monitored by piezoelectric sensors. Several combination of optical fiber with silicon microstructures or in integrated optics, but because of technical or economic reasons, up to now, these sensors are not fully suited for the above-mentioned applications. In this paper both optical fiber and integrated optics accelerometers developed in order to satisfy specifications required for these applications are presented. Their developments were a part of a European project dedicated to real time defect detection and predict forthcoming failures of a generator group in an electric power plant in Spain. In-laboratory and in-field test are reported.","PeriodicalId":399876,"journal":{"name":"Optical Fibre Sensors","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122044820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Radiation dosimetry in radiotherapy: a model for an extrinsic optical fiber sensor 放射治疗中的辐射剂量学:一种外源性光纤传感器模型

Optical Fibre Sensors Pub Date : 1998-06-18 DOI: 10.1117/12.309649

A. Mignani, S. Romano, F. Fusi, A. Mencaglia

{"title":"Radiation dosimetry in radiotherapy: a model for an extrinsic optical fiber sensor","authors":"A. Mignani, S. Romano, F. Fusi, A. Mencaglia","doi":"10.1117/12.309649","DOIUrl":"https://doi.org/10.1117/12.309649","url":null,"abstract":"The success of radiotherapy relies on the on-line monitoring of the dose of radiation to which the tumor and its adjacent tissues are exposed. Conventional thermoluminescence dosimeters provide only off-line monitoring, since they determine the radiation dosage after completion of the exposure. In order to overcome this limitation, optical fiber sensors have been proposed, which allow for a minimally invasive, real time and continuous monitoring of the delivered which allow for a minimally invasive, real time and continuous monitoring of the delivered dosage. These sensors make use of radio-transducers which are coupled at the end of a radiation-resistant fiber link, so as to obtain a radiation-induced intensity modulation. Typical radio-transducers are: (1) phosphors, which are stimulated to produce a visible luminescence linearly related to the radiation exposure; (2) heavy-metal-doped fiber sections, which undergo an intensity attenuation in the presence of radiation; (3) radiochromic dyes, which exhibit radiation-modulated optical absorption spectra. This paper presents preliminary test of radiation dosimetry performed by means of an extrinsic optical fiber sensor which makes use of a radiochromic film as radio-transducer. The spectral behavior of the transducer allows for two- wavelength differential measurements, so as to obtain a reference intensity-based sensor output.","PeriodicalId":399876,"journal":{"name":"Optical Fibre Sensors","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117233104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Survey of U.S. patent activity in optical fibre sensors 美国光纤传感器专利活动调查

Optical Fibre Sensors Pub Date : 1998-06-18 DOI: 10.1117/12.309677

Zhiyi Zhang, K. Grattan

引用次数: 3

Fiber lasers for sensing 传感用光纤激光器

Optical Fibre Sensors Pub Date : 1998-06-18 DOI: 10.1117/12.309679

B. Y. Kim

引用次数: 2