公开(公告)号：US06671055B1

公开(公告)日：2003-12-30

申请号：US09548972

申请日：2000-04-13

申请人： Thomas A. Wavering ,  Scott A. Meller ,  Jason W. Borinski ,  Wade J. Pulliam ,  Patrick M. Russler

发明人： Thomas A. Wavering ,  Scott A. Meller ,  Jason W. Borinski ,  Wade J. Pulliam ,  Patrick M. Russler

IPC分类号： G01B902

CPC分类号： G02B6/29398 ,  G01B9/02007 ,  G01B9/02023 ,  G01B9/02027 ,  G01B2290/25 ,  G02B6/29358

摘要： The present invention is directed toward an interferometric sensor that permits the simultaneous measurement of a change in more than one environmental condition. The interferometric sensor comprises an optical fiber and a plurality of sensing regions positioned in an operable relationship to the optical fiber. Each sensing region has partially reflective boundaries and produces an interferometric signal.

摘要翻译： 本发明涉及一种允许同时测量多于一种环境条件的变化的干涉测量传感器。 干涉测量传感器包括光纤和与光纤可操作的关系定位的多个感测区域。 每个感测区域具有部分反射边界并产生干涉信号。

公开(公告)号：US20030210403A1

公开(公告)日：2003-11-13

申请号：US10141372

申请日：2002-05-08

发明人： John Luscombe ,  John Maida

IPC分类号： G01B009/02

CPC分类号： G01B9/02023 ,  G01B9/02058 ,  G01B2290/70 ,  G01V1/16

摘要： In an interferometric sensing apparatus, a scrambler is positioned in front of a polarizer, followed by a detector. In that way, although the two beams remain orthogonal to each other, they are continuously rotated, relative to the polarizer. In some positions, both beams pass through the polarizer and interfere, thus eliminating polarization fading. The signal is amplitude modulated at the rotation frequency of the scrambler, but this modulation is removed by low pass filtering.

摘要翻译： 在干涉测量传感装置中，扰频器位于偏振器的前面，随后是检测器。 以这种方式，尽管两个光束保持彼此正交，但是它们相对于偏振器连续旋转。 在一些位置，两束光通过偏振器并干涉，从而消除偏振衰落。 信号在扰频器的旋转频率处进行幅度调制，但是通过低通滤波来去除该调制。

公开(公告)号：US20020196449A1

公开(公告)日：2002-12-26

申请号：US10140815

申请日：2002-05-09

发明人： Keishi Kubo ,  Yukio Imada ,  Hiroyuki Takeuchi ,  Kouji Handa ,  Keiichi Yoshizumi

IPC分类号： G01B009/02

CPC分类号： G01B9/02023 ,  G01B9/02018 ,  G01B9/02031 ,  G01B11/026 ,  G01B2290/70

摘要： Arranged in both sides of the thin plate are optical displacement gauges that irradiate measurement lights to surfaces of a thin plate and receive the measurement lights reflected by the surfaces so as to measure displacements of the surfaces of the thin plate. Variation of thickness of the thin plate is obtained on the basis of the displacements of the surfaces of the thin plate measured by each of the optical displacement gauges. Each of the optical displacement gauges detects the displacement of the surface of the thin plate with high accuracy by irradiating the measurement light to the thin plate two times.

摘要翻译： 在薄板的两侧布置的是光学位移计，其将测量光照射到薄板的表面，并接收由表面反射的测量光，以测量薄板的表面的位移。 基于由每个光学位移计测量的薄板的表面的位移，获得薄板厚度的变化。 每个光学位移计通过将测量光照射到薄板两次来高精度地检测薄板表面的位移。

公开(公告)号：US06211964B1

公开(公告)日：2001-04-03

申请号：US09344098

申请日：1999-06-25

申请人： John Luscombe ,  John L. Maida, Jr. ,  Malcolm Paul Varnham ,  Erhard Lothar Edgar Kluth ,  Sam Bull

发明人： John Luscombe ,  John L. Maida, Jr. ,  Malcolm Paul Varnham ,  Erhard Lothar Edgar Kluth ,  Sam Bull

IPC分类号： G01B902

CPC分类号： G01H9/004 ,  G01B9/02002 ,  G01B9/02005 ,  G01B9/02007 ,  G01B9/02023 ,  G01B9/02027 ,  G01B9/0205 ,  G01B9/0209

摘要： A structure for incorporating fiber optic acoustic sensor in a seismic array includes means for supporting the sensor in a spiral around a central strength member in a manner to isolate shear waves from the sensor. In another aspect, an axially oriented sensor in a seismic array comprises a pressure sensitive optical fiber wound in a spiral around the axis, the fiber having a plurality of optical Bragg gratings and a plurality of channels. The preferred structure may include four tubes spiraling around the strength member. One of the tubes encloses an optical fiber sensor which is maintained in an extended orientation by fluid flow through the tube. Another of the tubes serves as a return path for fluid through the sensor tube. The other tubes enclose high speed and low speed data conductors, respectively. The sensor fiber may also be wound in a spiral around a compliant core in a manner to satisfy Poisson's Ratio such that strain on the compliant core does not alter the tension of the sensor fiber.

摘要翻译： 用于将光纤声学传感器结合在地震阵列中的结构包括用于将传感器以围绕传感器隔离剪切波的方式以围绕中心强度构件的螺旋形支撑的装置。 在另一方面，地震阵列中的轴向定向的传感器包括缠绕在轴线周围的螺旋的压敏光纤，光纤具有多个光学布拉格光栅和多个通道。 优选的结构可以包括围绕强度构件螺旋的四个管。 一个管子包围一个光纤传感器，它通过流体流过管道而保持在一个延伸的方向。 另一个管用作通过传感器管的流体的返回路径。 其他管分别包围高速和低速数据导体。 传感器光纤也可以以满足泊松比的方式围绕柔性芯缠绕成螺旋形，使得柔性芯上的应变不会改变传感器光纤的张力。

公开(公告)号：US5289256A

公开(公告)日：1994-02-22

申请号：US9036

申请日：1993-01-26

申请人： Hubert Gramling

发明人： Hubert Gramling

IPC分类号： G01B9/02 ,  G01B11/16 ,  G01D5/26 ,  G01N21/45 ,  G02B6/12 ,  G02B6/26 ,  G02B6/34 ,  G02B6/43

CPC分类号： G02B6/43 ,  G01B11/161 ,  G01B9/02023 ,  G01B9/02051 ,  G01D5/266 ,  G02B6/12004 ,  G02B6/29355

摘要： An integrated-optics extension interferometer, in which the measuring and reference arm, the beam splitter and the beam coupler as well as entrances and exits for primary light and interference light are integrated in the baseplate, can be applied in the manner of a wire strain gauge to components to be investigated. The portions of the waveguide which form the measuring and reference arm are integrated over their entire length in the baseplate, and are disposed in a plurality of loops with mutually parallel oriented straight active partial sections and intermediate deflecting sections, in which a coupling free mutual minimum spacing of all straight active partial sections and deflecting sections of the integrated waveguides forming the measuring and reference arm respectively is observed at all locations. As a result of this, the fundamental interferometer can be applied to the surface of stressed workpieces in a manner which is as simple and space-saving as a conventional electrical-resistance wire strain gauge for extension measurements. In order to achieve an automatic compensation of the extension due to temperature, the reference arm is also expediently wound in the manner of loops and is designed to be of the same length as the measuring arm, but is disposed in an extension-metrologically neutral manner. An integrated-optics extension interferometers of double-beam construction according to Michelson or according to Mach-Zehnder and those of so-called multibeam construction according to Fabry-Perot are possible.

摘要翻译： 集成光学延伸干涉仪，其中测量和参考臂，分束器和光束耦合器以及用于初级光和干涉光的入射和出射集成在基板中，可以以线应变的方式 测量要调查的部件。 形成测量和参考臂的波导部分在其整个长度上集成在基板中，并且被布置在具有相互平行取向的直线有源部分部分和中间偏转部分的多个环中，其中耦合自由相互最小 在所有位置观察到分别形成测量和参考臂的集成波导的所有直的有源部分部分和偏转部分的间隔。 其结果是，基本的干涉仪可以以与传统的用于延伸测量的电阻应变仪一样简单和节省空间的方式应用于应力工件的表面。 为了实现由温度引起的延伸的自动补偿，参考臂也可以以环路的方式方便地缠绕，并且被设计成与测量臂具有相同的长度，而是以延伸计量中性的方式设置 。 根据Michelson或Mach-Zehnder的双光束结构的集成光学延伸干涉仪以及根据法布里 - 珀罗的所谓多波束结构的干涉仪是可能的。

公开(公告)号：US20230417534A1

公开(公告)日：2023-12-28

申请号：US18344575

申请日：2023-06-29

申请人： Huvr, Inc

发明人： Zbigniew Sobolewski

IPC分类号： G01B9/02015 ,  G01C19/72

CPC分类号： G01B9/02023 ,  G01C19/728 ,  G01C19/727

摘要： An optical fiber ring interferometer is provided, which is based on a common light path for two or more light beam pairs preferably originated from two or more light sources of a substantially different spectrum or from a single light source split spectrum and whereas each light beam of a specific pair is propagating in relative opposite directions, wherein at least one pair of light beams is utilized to detect acousto-mechanical events and to provide information regarding location and other characteristics of detected environmental disturbance.

公开(公告)号：US20160238369A1

公开(公告)日：2016-08-18

申请号：US15140067

申请日：2016-04-27

申请人： SHENZHEN UNIVERSITY

发明人： Qiao WEN ,  Guowen LIANG ,  Ji LI ,  Hanben NIU

IPC分类号： G01B9/02 ,  H01S3/083 ,  H01S3/08 ,  H01S3/10

CPC分类号： H01S3/08059 ,  G01B9/02003 ,  G01B9/02023 ,  G01B2290/70 ,  H01S3/06712 ,  H01S3/06791 ,  H01S3/08013 ,  H01S3/082 ,  H01S3/083 ,  H01S3/10061

摘要： The present invention is suitable for the technical field of sensing, and provides an sensor based on laser, comprising a pump source, a common section, a reference section and a detection section, the common section is provided with a gain medium, and the detection section is provided with a sensing element capable of causing an optical path difference; the reference section and the detection section is connected to the common section though a first polarization splitting unit and a second polarization splitting unit; the common section is provided with an output unit or each of the reference section and the detection is provided with the output unit, the output unit is connected to a photoelectric detector through a light uniting unit; a polarization rotation unit is disposed between the light uniting unit and the output unit. In the present invention, a heterodyne interference is generated by the two lasers with different frequency, the amounts of physical quantities are determined by detecting the frequency difference; and because the frequencies of the laser oscillations are sensitive to the changes of the optical paths in the resonators, the sensitivity and accuracy of the sensor are high, and the two resonators of the sensor have common optical path, such that the sensor has good anti-jamming capacity and is suitable for measuring the small changes in a variety of physical quantities.

摘要翻译： 本发明适用于感测技术领域，提供了一种基于激光的传感器，包括泵浦源，公共部分，参考部分和检测部分，公共部分设置有增益介质，检测 部分设置有能够引起光程差的感测元件; 参考部分和检测部分通过第一偏振分束单元和第二偏振分离单元连接到公共部分; 公共部分设置有输出单元或参考部分中的每一个，检测装置设置有输出单元，输出单元通过光联合单元连接到光电检测器; 偏振旋转单元设置在光联合单元和输出单元之间。 在本发明中，通过不同频率的两个激光器产生外差干扰，通过检测频率差来确定物理量的量; 并且由于激光振荡的频率对谐振器中的光路的变化敏感，传感器的灵敏度和精度都很高，传感器的两个谐振器具有共同的光路，使得传感器具有良好的抗 - 适用于测量各种物理量的小变化。

公开(公告)号：US20150131106A1

公开(公告)日：2015-05-14

申请号：US14538831

申请日：2014-11-12

申请人： Marcel W. Pruessner ,  Todd H. Stievater ,  William S. Rabinovich

发明人： Marcel W. Pruessner ,  Todd H. Stievater ,  William S. Rabinovich

IPC分类号： G01B11/14 ,  G02F1/01

CPC分类号： G01B11/161 ,  G01B9/02023 ,  G01B9/02051 ,  G01B11/026 ,  G01B11/14 ,  G01D5/35329

摘要： A method and system described for sensing a displacement by receiving and propagating a laser light signal with an etched waveguide that is configured to enable an evanescent optical field above the waveguide surface. A movable perturber can be positioned so the perturber interacts with the evanescent optical field above the waveguide surface. An optical phase shift can be induced in the waveguide when the movable perturber is displaced in the evanescent optical field, and the optical phase shift can be measured with an optical readout circuit.

摘要翻译： 一种用于通过接收和传播具有蚀刻波导的激光信号来感测位移的方法和系统，所述蚀刻波导被配置为使能在波导表面上方的渐逝光场。 可以定位可移动的perturber，使得扰波器与波导表面上方的渐逝光场相互作用。 当可逆超声波在渐逝光场中移位时，可以在波导中引起光学相移，并且可以用光学读出电路测量光学相移。

公开(公告)号：US08793102B2

公开(公告)日：2014-07-29

申请号：US12772253

申请日：2010-05-03

申请人： Brooks A. Childers ,  Robert M Harman ,  Daniel S. Homa ,  Lance A. Beckner

发明人： Brooks A. Childers ,  Robert M Harman ,  Daniel S. Homa ,  Lance A. Beckner

IPC分类号： G06F17/18

CPC分类号： G01V8/02 ,  G01B9/02023 ,  G01B9/02025 ,  G01B2290/25 ,  G01D5/268 ,  G01K5/48 ,  G01K11/3206

摘要： An apparatus for estimating a property includes a hollow core tube and an input light guide disposed at least partially within hollow core tube. The apparatus also includes a second gap disposed within the hollow core tube and separated from the input light guide by an air gap width. The second gap is formed of a first solid material and has a second gap width. The apparatus also includes a third gap disposed at least partially within the hollow core tube and being further from the input light guide than the second gap. The third gap is formed of a second solid material and has a third gap width.

摘要翻译： 用于估计特性的装置包括中空芯管和至少部分地设置在中空芯管内的输入光导。 该设备还包括设置在中空芯管内的第二间隙，并且通过气隙宽度与输入光导分离。 第二间隙由第一固体材料形成并具有第二间隙宽度。 该装置还包括至少部分地设置在中空芯管内并且比第二间隙更远离输入光导的第三间隙。 第三间隙由第二固体材料形成并且具有第三间隙宽度。

公开(公告)号：US08736822B2

公开(公告)日：2014-05-27

申请号：US12812996

申请日：2009-07-15

申请人： Ronald L Spross ,  John Gallagher ,  Neal G Skinner

发明人： Ronald L Spross ,  John Gallagher ,  Neal G Skinner

IPC分类号： G01L1/24

CPC分类号： E21B47/18 ,  G01B9/02023 ,  G01L9/0007

摘要： An apparatus to detect a pressure signal in a fluid flowing in a conduit comprises a flexible band sized to fit at least partially around the conduit. An optical fiber is flexibly adhered to the flexible band. At least one fastener is attached to the flexible band to fasten the flexible band at least partially around the conduit. A method for detecting a pressure signal in a conduit comprises adhering an optical fiber to a flexible band. At least one fastener is attached to the band. The band is fastened around the conduit such that a strain induced in the conduit by the pressure signal is transmitted to the optical fiber.

摘要翻译： 检测在导管中流动的流体中的压力信号的装置包括尺寸适于至少部分地围绕导管配合的柔性带。 光纤柔性地粘附在柔性带上。 至少一个紧固件附接到柔性带，以至少部分地围绕导管紧固柔性带。 用于检测管道中的压力信号的方法包括将光纤粘附到柔性带。 至少一个紧固件附接到带上。 带被紧固在导管上，使得通过压力信号在导管中感应的应变被传送到光纤。