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公开(公告)号：US20240125627A1
公开(公告)日：2024-04-18
申请号：US18276783
申请日：2021-03-26
申请人： NEC Corporation
发明人： Yukihide Yoda , Naoto Ogura , Tadayuki Iwano
IPC分类号： G01D5/353
CPC分类号： G01D5/353
摘要： Provided is a portable device which make it possible to facilitate analysis, in cooperation with an external system, on data obtained by optical fiber sensing. A portable device comprises: a sensing unit configured to execute optical fiber sensing using an optical fiber cable; an analysis unit configured to execute primary analysis processing on sensing data obtained by the optical fiber sensing; a communication unit configured to transmit data containing the results of the primary analysis processing to an external analysis unit configured to execute, outside the portable device, secondary analysis processing based on the results of the primary analysis processing; and a housing which accommodates the sensing unit, the analysis unit, and the communication unit.
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42.发明公开公开(公告)号：US20230184622A1
公开(公告)日：2023-06-15
申请号：US17644003
申请日：2021-12-13
发明人： Ezzedeen Alfataierge
CPC分类号： G01M11/3109 , G01D5/353 , G02B6/02076
摘要： Methods for determining sensor channel location in distributed sensing of fiber-optic cables are disclosed. In one method, three or more Fiber Bragg-Gratings (FBGs) connected in series by a standard telecommunication fiber and interrogated using an input distributed fiber-optic sensing (DFOS) laser, where the input DFOS laser has a single wavelength. The input DFOS laser operates on a single wavelength that is different than the respective wavelengths of each of the three or more FBGs. The three or more FBGs are interrogated using an input broadband FBG laser. Each FBG reflects a wavelength of laser light that is proportional to the grating size, using an optical time domain reflectometer (OTDR) at the FBG wavelength, the distance to the particular FBG in the optical domain is computed and compared to the physical measurement of the FBG location. The sensor channel locations of the DFOS system are calibrated and constrained using this method.
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公开(公告)号：US20180238791A1
公开(公告)日：2018-08-23
申请号：US15903638
申请日：2018-02-23
CPC分类号： G01N19/10 , G01D5/353 , G01N21/553 , G01N2201/088 , G02B6/4246 , G02B6/4298
摘要： A humidity sensing method and system comprising a transmitter, comprising a fiber optic head and a light source comprising a single LED emitting a measuring light, a receiver, and a sensing assembly comprising a plurality of optical fibers each comprising a first end fed the measuring light, a transducer positioned along a length thereof, the transducer comprising a side-polished portion of the optical fiber, the side polished portion coated with a gold layer and a film of a hydrophilic material wherein the transducer modifies an intensity of the measuring light dependent on an ambient humidity, and a second end for feeding the modified measuring light to the receiver, wherein the receiver compares an intensity of the measuring light with an intensity of the modified measuring light deriving therefrom a corresponding humidity level and dew point temperature.
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公开(公告)号：US20180231600A1
公开(公告)日：2018-08-16
申请号：US15895099
申请日：2018-02-13
发明人： Karsten Hähre , Raoul Heyne , Michael Kiefer
CPC分类号： G01R31/1218 , G01D5/353 , G01D5/35345 , G01D5/35374 , G01R31/1272 , G02B6/262 , G02B6/4421 , H01B7/02 , H01B7/328
摘要： A current conduction element includes an electrical, conductor and an insulation of the electrical conductor. The insulation includes a light waveguiding unit. Furthermore, a system and method for insulation monitoring are described.
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公开(公告)号：US09909987B1
公开(公告)日：2018-03-06
申请号：US14813834
申请日：2015-07-30
CPC分类号： G01N27/02 , G01D5/353 , G01N33/246
摘要： Systems, methods, and software for measuring the spatially variable relative dielectric permittivity of materials along a linear or otherwise configured sensor element, and more specifically the spatial variability of soil moisture in one dimension as inferred from the dielectric profile of the soil matrix surrounding a linear sensor element. Various methods described herein combine advances in the processing of time domain reflectometry data with innovations in physical sensing apparatuses. These advancements enable high temporal (and thus spatial) resolution of electrical reflectance continuously along an insulated waveguide that is permanently emplaced in contact with adjacent soils. The spatially resolved reflectance is directly related to impedance changes along the waveguide that are dominated by electrical permittivity contrast due to variations in soil moisture. Various methods described herein are thus able to monitor soil moisture in profile with high spatial resolution.
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公开(公告)号：US20180058956A1
公开(公告)日：2018-03-01
申请号：US15560474
申请日：2016-03-17
发明人： Stéphanie MOLIN , Martine DOISY , Arnaud PEIGNE , Stefania RESIDORI , Umberto BORTOLOZZO , Jean-Pierre HUIGNARD , Renaud BOUFFARON , Daniel DOLFI
CPC分类号： G01L1/242 , G01D5/353 , G01D5/35306 , G01H9/004
摘要： A distributed optical fiber sensor of dynamic stress state comprises: an optical assembly configured to generate a series of optical pulses; an optical fiber of optical length L; an optical system configured to: inject through the first end at least the series of optical pulses; receive at the level of the end at least one series of output optical pulses, arising from the input pulses after propagation and retro-propagation in the fiber; generate at least one continuous reference beam or reference optical pulses on the basis of the optical assembly or of output optical pulses; produce a series of interference zones corresponding to the interference between the reference beam or a reference pulse and a signal optical pulse arising from an output optical pulse; a holographic detector comprising: a liquid-crystal light valve, the valve disposed so that it at least partially covers the interference zones, and producing holograms on the basis of the interference zones; at least one optical detector configured to detect output optical signals diffracted by the holograms.
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公开(公告)号：US20180045539A1
公开(公告)日：2018-02-15
申请号：US15677953
申请日：2017-08-15
发明人： Christopher Bunai
IPC分类号： G01D5/353
摘要： Described herein is an improved displacement transducer, a closed loop control system incorporating the same, and an improved method of manufacturing of manufacturing a displacement transducer. The improved transducer has several advantages, including improved manufacturability; improved fluid flow within the sensor and reduced cavitation as a result; and the enablement of closed loop control for assisted manual or fully automatic displacement.
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48.发明授权公开(公告)号：US09778078B2
公开(公告)日：2017-10-03
申请号：US14276792
申请日：2014-05-13
发明人： Domino Taverner
CPC分类号： G01D5/35354 , G01D5/353 , G01D5/35316 , G01D5/35387 , G01K11/3206 , G01L1/246 , G02B6/29319
摘要： Methods and apparatus for fast sweeping a spectral bandwidth in order to distinguish among signals received from effectively wavelength division multiplexed (WDMed) and time division multiplexed (TDMed) optical components on a single fiber. For some embodiments, a method for interrogating optical elements having characteristic wavelengths spanning a sweep range is provided. The method generally includes introducing a pulse of light, by an optical source, into an optical waveguide to interrogate at least a first set of optical elements having different characteristic wavelengths by performing a sweep of wavelengths over a period of the pulse, wherein the period is less than a round-trip time for light reflected from an optical element closest to the optical source to reach a receiver and processing the reflected light to determine a parameter based on the times at which signals are received.
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公开(公告)号：US20170138179A1
公开(公告)日：2017-05-18
申请号：US15325413
申请日：2014-08-20
发明人： Mikko Jaaskelainen , Priyesh Ranjan , Nitika Kalia
CPC分类号： E21B47/101 , E21B43/16 , E21B47/102 , E21B47/123 , G01D5/353
摘要： A flow rate sensing system can include an optical waveguide, an optical interrogator that detects optical scatter in the optical waveguide, and an emitter that produces vibration in response to flow, the optical scatter being influenced by the vibration. A method of measuring flow rate can include detecting optical scattering in an optical waveguide, the optical scattering varying in response to changes in vibration produced by an emitter, and the vibration changing in response to the flow rate changing. A well system can include at least one tubular string positioned in a wellbore, multiple locations at which fluid flows between an interior and an exterior of the tubular string, multiple emitters, each of which produces vibration in response to the flow between the interior and the exterior of the tubular string, and an optical waveguide in which optical scatter varies in response to changes in the vibration.
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公开(公告)号：US20170057659A1
公开(公告)日：2017-03-02
申请号：US15254365
申请日：2016-09-01
发明人： Christopher WOOD , Alan SHARP , Carsten HEUER
CPC分类号： B64D45/0005 , G01B7/003 , G01B11/002 , G01D5/353 , G01D5/35312 , G01D5/35316 , G01D5/485
摘要： An apparatus for determining the position of an object having one or more magnetic elements. The apparatus includes magnetostrictive optical sensors, each arranged to produce a signal which is indicative of a proximity of the sensor to the one or more magnetic elements. The apparatus is arranged to determine the position of the object based on a plurality of such proximity signals.
摘要翻译： 一种用于确定具有一个或多个磁性元件的物体的位置的装置。 该装置包括磁致伸缩光学传感器，每个光学传感器被布置成产生指示传感器与一个或多个磁性元件接近的信号。 该装置被布置为基于多个这样的接近信号来确定对象的位置。
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