Results 121 to 130 of about 167 (163)
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Fiber optic distributed thermal sensor
Applied Physics Letters, 1988A novel concept of a fiber optic distributed sensor is presented. In particular, we describe a distributed thermal sensor formed by inducing a deliberated absorption in an infrared optical fiber. The increased absorption coefficient αab of this modified fiber determines the linear sensing length of the distributed thermal sensor.
A. Zur, A. Katzir
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Distributed and quasi-distributed optical fiber sensors
Measurement Techniques, 1991Sometimes it is necessary to know the longitudinal surface, or bulk distribution pattern of certain physical quantities, e.g., to find the distribution of temperature and (or) mechanical stresses on the surface of buildings, bridges, dams, large reservoirs, aircraft, mobile platforms, ships, etc.; or to find the temperature distribution of electric ...
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Tactile sensors using the distributed optical fiber sensors
2008 3rd International Conference on Sensing Technology, 2008This paper describes two kinds of the tactile sensors using the optical fiber sensors. One is the tactile sensor using fiber Bragg grating (FBG) sensor. Bragg grating inscribed in an optical fiber causes reflect of a spectral component at the Bragg wavelength. This sensor can detect external force using change of the reflective wavelength. The other is
null Jin-Seok Heo +2 more
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Distributed optical fiber sensors and their applications
2008 SICE Annual Conference, 2008This paper contains the theory behind optical fiber sensing measurement and the latest trends in optical fiber sensing measurement and its applications. Smart structures and materials in which an optical fiber acts as a sensor to measure distributed strain and/or temperature along the fiber have applications in health monitoring functions, such as ...
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Wavelength-scanning technique for distributed fiber-optic sensors
Optics Letters, 1993A new technique for distributed fiber-optic sensing is described. It is a wavelength-scanning method that uses, as a sensing element, a polarization-maintaining fiber illuminated with a white-light source. The distribution of the mode-coupling coefficient is determined by a new digital procedure with a fast-Fourier-transform algorithm.
A, Khomenko +3 more
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Distributed fiber-optic sensors
1995Optical fiber sensors have been researched now for a number of years and a wide body of knowledge has been accumulated as witnessed by other chapters in this book. Although much of the initial development of these sensors was technology-driven, the most successful examples of fiber sensors are those where one or more of the often-cited benefits of ...
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Quantification of Submillimeter Displacements by Distributed Optical Fiber Sensors
IEEE Transactions on Instrumentation and Measurement, 2016The estimation of sinkhole-induced ground displacement is an important issue for monitoring soil structures. Distributed optical fiber sensors (DOFSs) composed of an interrogator based on scattering effects in an optical fiber cable sensing element can be used to assess ground displacement.
Edouard Buchoud +6 more
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Fully Distributed Optical Fiber Sensor
2019The fully distributed optical fiber sensor takes the whole fiber as the sensing unit and the sensing point is continuously distributed. It can measure the information at any location along the fiber-optic fiber called as the mass sensing head. Therefore, the distributed sensor, with its unique advantages of a wide range of sensing and continuous ...
Yanliang Du +3 more
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Distributed Fiber-Optic Sensors: An Overview
SPIE Proceedings, 1986This paper reviews recent developments in distributed fiber optic sensing systems (DFOSS) employing optical time domain reflectometry (OTDR), polarization optical time domain reflectometry (POTDR), and frequency domain reflectometry (OFDR) techniques.
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A Low-Cost Double-Fiber Model Distributed Optical Fiber Sensor
IEEE Transactions on Instrumentation and Measurement, 2007This paper presents a novel low-cost, double-fiber model optical fiber sensor for distributed strain monitoring. The sensor is composed of two fibers: the active fiber and the passive fiber. Localized strain makes light couple from the active fiber to the passive fiber. The output of the active fiber is used for strain value sensing, whereas the double-
Chuantong Wang, Katsunori Shida
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