-
1.发明公开公开(公告)号：US20230417580A1
公开(公告)日：2023-12-28
申请号：US18367497
申请日：2023-09-13
发明人： Gert Wim 'T HOOFT , Eibert Gerjan VAN PUTTEN , Jeroen Jan Lambertus HORIKX , Anna Hendrika VAN DUSSCHOTEN
CPC分类号： G01D5/35316 , G01B11/2441 , G01D5/35374
摘要： The present invention relates to an optical fiber sensor, comprising an optical fiber having embedded therein at least one fiber core (14, 16, 18, 20) extending along a length of the optical fiber, the at least one fiber core having a plurality of single fiber Bragg gratings (40, 42, 44) arranged in series along the at least one fiber core (14, 16, 18, 20), wherein each fiber Bragg grating (40, 42, 44) has a single reflection spectrum around a single reflection peak wavelength when interrogated with light in an unstrained state of the at least one fiber core (14, 16, 18, 20), wherein the reflection peak wavelengths of the single reflection spectra are different from fiber Bragg grating (40, 42, 44) to fiber Bragg grating (40, 42, 44) along the at least one fiber core. Also described is an optical system and a method of interrogating an optical fiber sensor.
-
公开(公告)号：US09891134B2
公开(公告)日：2018-02-13
申请号：US14568439
申请日：2014-12-12
CPC分类号： G01M11/3109 , G01D5/35358 , G01D5/35374 , G01H9/004 , G01M11/3136 , G01S17/026 , G01S17/102 , G01S17/88 , G01V1/001 , G08B13/124
摘要： A long-distance fiber optic monitoring system having a sensing unit and an analyzer that is remotely located from the sensing unit is provided. The sensing unit comprises a source of optical energy for injecting optical energy into the fiber optical cable and an optical detector configured to detect an optical return signal from the optical fiber. The detected optical return signal is associated with an acoustic signal impinging on the optical fiber. The analyzer receives a signal from the remote sensing unit via the optical fiber that is representative of the optical return signal, and determines a location of a disturbance based at least on the received signal. The representative signal can be transmitted from the remote sensing unit to the analyzer as an optical signal or via a metallic wired included with the optical fiber.
-
公开(公告)号：US20170179364A1
公开(公告)日：2017-06-22
申请号：US15382046
申请日：2016-12-16
发明人： Justin Schwartz , Federico Scurti , Samuel Rogers , Wan Kan Chan
CPC分类号： H01L39/126 , G01D5/35361 , G01D5/35374 , G21B1/21 , H01B7/324 , H01F6/02 , H01L39/143 , H05H7/00
摘要： Disclosed are systems and methods for a self-monitoring conducting system that can respond to temperature, strain, and/or radiation changes via the use of optical fibers. The self-monitoring conducting system comprises a conducting component integrated with one or more optical fibers. The temperature, strain, and/or radiation changes can be sensed or detected via optical interrogation of the one or more optical fibers.
-
公开(公告)号：US09534965B2
公开(公告)日：2017-01-03
申请号：US14250057
申请日：2014-04-10
发明人： Anthony Brown , Bruce Colpitts
CPC分类号： G01K11/32 , G01B11/18 , G01D5/35364 , G01D5/35374 , G01K2011/322 , G01L1/242 , G01N2021/638
摘要： A cable for distributed fiber optic sensing comprising a flexible tape, an optical fiber suitable for Brillouin scattering measurement forming at least two lengths, and at least one free end of at least one length being connectable to a reading unit, wherein at least a section of the longitudinal length of the flexible tape is situated between at least a section of the two lengths such that the two lengths are in close proximity such that a temperature gradient between the two lengths is minimized, and wherein the section of the tape and the section of lengths can flex together.
摘要翻译： 一种用于分布式光纤传感的电缆，包括柔性带，适用于形成至少两个长度的布里渊散射测量的光纤，以及可连接到读取单元的至少一个长度的至少一个自由端，其中至少一部分 柔性带的纵向长度位于两个长度的至少一段之间，使得两个长度紧密接近，使得两个长度之间的温度梯度最小化，并且其中带的截面和 长度可以一起弯曲。
-
公开(公告)号：US20140218716A1
公开(公告)日：2014-08-07
申请号：US14250057
申请日：2014-04-10
发明人： Anthony Brown , Bruce Colpitts
CPC分类号： G01K11/32 , G01B11/18 , G01D5/35364 , G01D5/35374 , G01K2011/322 , G01L1/242 , G01N2021/638
摘要： A cable for distributed fibre optic sensing comprising a flexible tape, an optical fibre suitable for Brillouin scattering measurement forming at least two lengths, and at least one free end of at least one length being connectable to a reading unit, wherein at least a section of the longitudinal length of the flexible tape is situated between at least a section of the two lengths such that the two lengths are in close proximity such that a temperature gradient between the two lengths is minimized, and wherein the section of the tape and the section of lengths can flex together.
摘要翻译： 一种用于分布式光纤传感的电缆，包括柔性带，适用于形成至少两个长度的布里渊散射测量的光纤，以及可连接到读取单元的至少一个长度的至少一个自由端，其中至少一部分 柔性带的纵向长度位于两个长度的至少一段之间，使得两个长度紧密接近，使得两个长度之间的温度梯度最小化，并且其中带的截面和 长度可以一起弯曲。
-
公开(公告)号：US20110075152A1
公开(公告)日：2011-03-31
申请号：US12567853
申请日：2009-09-28
IPC分类号： G01B9/02
CPC分类号： G01M11/3109 , G01D5/35358 , G01D5/35374 , G01H9/004 , G01M11/3136 , G01S17/026 , G01S17/102 , G01S17/88 , G01V1/001 , G08B13/124
摘要： A long-distance fiber optic monitoring system having a sensing unit and an analyzer that is remotely located from the sensing unit is provided. The sensing unit comprises a source of optical energy for injecting optical energy into the fiber optical cable and an optical detector configured to detect an optical return signal from the optical fiber. The detected optical return signal is associated with an acoustic signal impinging on the optical fiber. The analyzer receives a signal from the remote sensing unit via the optical fiber that is representative of the optical return signal, and determines a location of a disturbance based at least on the received signal. The representative signal can be transmitted from the remote sensing unit to the analyzer as an optical signal or via a metallic wired included with the optical fiber.
摘要翻译： 提供了具有远离感测单元的感测单元和分析器的长距离光纤监视系统。 感测单元包括用于将光能注入到光纤光缆中的光能源和被配置为检测来自光纤的光返回信号的光检测器。 检测到的光返回信号与入射在光纤上的声信号相关联。 分析仪通过表示光返回信号的光纤接收来自遥感单元的信号，并且至少基于接收信号确定干扰的位置。 代表信号可以作为光信号从遥感单元发送到分析器，或者通过光纤包括的金属线传输。
-
公开(公告)号：US20020063200A1
公开(公告)日：2002-05-30
申请号：US09726060
申请日：2000-11-29
IPC分类号： G01J001/04
CPC分类号： G01F1/666 , G01D5/35316 , G01D5/35374
摘要： An apparatus for non-intrusively sensing fluid flow within a pipe is provided. The apparatus includes an array of sensors that include a plurality of optical fiber coils. The array of sensors senses the fluid flow inside the pipe. At least one optical reflective device is disposed between adjacent optical fiber coils. An isolation pad is disposed between each optical reflective device and the pipe.
摘要翻译： 提供了一种用于非侵入式地感测管内流体流动的装置。 该装置包括包括多个光纤线圈的传感器阵列。 传感器阵列检测管道内的流体流动。 至少一个光学反射装置设置在相邻的光纤线圈之间。 隔离垫设置在每个光反射装置和管之间。
-
公开(公告)号：US20180045543A1
公开(公告)日：2018-02-15
申请号：US15555628
申请日：2016-03-07
申请人： Silixa Ltd.
CPC分类号： G01D5/35374 , G01D5/35306 , G01D5/3537 , G01H9/004
摘要： An optical fiber distributed acoustic sensor system includes weak broadband reflectors inserted periodically along the fiber. The reflectors reflect only a small proportion of the light from the DAS incident thereon back along the fiber, typically in the region of 0.001% to 0.1%, but preferably around 0.01% reflectivity per reflector. In addition, to allow for temperate compensation to ensure that the same reflectivity is obtained if the temperature changes, the reflection bandwidth is relatively broadband. In some embodiments the reflectors are formed from a series of fiber Bragg gratings, each with a different center reflecting frequency, the reflecting frequencies and bandwidths of the gratings being selected to provide the broadband reflection. A chirped grating may also be used to provide the same effect. In preferred embodiments, the reflectors are spaced at half the gauge length i.e. the desired spatial resolution of the optical fiber DAS.
-
9.发明申请公开(公告)号：US20170321801A1
公开(公告)日：2017-11-09
申请号：US15523118
申请日：2015-09-29
发明人： Andreas Peukert , Ralf Pfeifer
CPC分类号： F16H61/32 , F16H59/044 , F16H63/3458 , F16H2059/0295 , G01D5/35341 , G01D5/35374 , H03K17/968 , H03K2217/9655
摘要： The present disclosure relates to a shift device for a control system for a vehicle. The shift device may include at least one optical fiber for conducting a light signal, where the light signal has an input characteristic when entering the shift device, and where the light signal has an output characteristic when exiting the shift device. The shift device may further include a control element, where the control element can be moved between a home position, a first actuation position, and a second actuation position by an actuation force. The control element may have an adjustment device for adjusting the characteristic of the light signal, where the adjustment device is configured to set the output characteristic of the light signal to a first value when the control element is in the home position.
-
公开(公告)号：US20160047976A1
公开(公告)日：2016-02-18
申请号：US14779998
申请日：2014-03-18
发明人： Wolfgang Schade , Jörg Burgmeier
CPC分类号： G02B6/021 , G01B11/18 , G01D5/268 , G01D5/35316 , G01D5/35374 , G01D5/3538 , G01D5/35387 , G02B6/02042
摘要： The invention relates to a fibre-optic sensor comprising an optical waveguide having at least one first core and a cladding surrounding the first core, wherein the first core extends substantially over the entire length of the optical waveguide, wherein the sensor has at least one second core which is at least partly surrounded by the cladding, wherein the longitudinal extent of the second core is less than the total length of the optical waveguide and at least one Bragg grating is introduced into the second core. Furthermore, the invention relates to a use of the fibre-optic sensor.
摘要翻译： 本发明涉及一种包括光波导的光纤传感器，该光波导具有至少一个第一芯和围绕第一芯的包层，其中该第一芯基本上在该光波导的整个长度上延伸，其中该传感器具有至少一个第二芯 芯，其至少部分地被包层围绕，其中第二芯的纵向范围小于光波导的总长度，并且至少一个布拉格光栅被引入第二芯。 此外，本发明涉及光纤传感器的用途。
-
-
-
-
-
-
-
-
-
搜索结果
74 条记录 (耗时 0.013 秒)
