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    Fiber optic measuring apparatus and method
    31.
    发明授权
    Fiber optic measuring apparatus and method 失效
    光纤测量装置及方法

    公开(公告)号：US5446533A

    公开(公告)日：1995-08-29

    申请号：US179639

    申请日：1988-04-08

    Applicant: Eric Udd ,  John P. Theriault

    Inventor： Eric Udd ,  John P. Theriault

    IPC: G01C19/72 ,  G02B6/34 ,  G01N21/00 ,  G01C3/08 ,  G02B6/00

    CPC classification number: G01C19/72

    Abstract: A method and apparatus for a fiber optic measuring system is disclosed which works on the speed of propagation principle. The device can be utilized to determine the position of a disturbance or electronic source along the length of an optical path.

    Abstract translation: 公开了一种用于光纤测量系统的方法和装置，其基于传播原理的速度。 该装置可用于沿光路的长度确定扰动或电子源的位置。

    Phase nulling optical gyro
    33.
    发明授权
    Phase nulling optical gyro 失效
    相位归零光学陀螺仪

    公开(公告)号：US4299490A

    公开(公告)日：1981-11-10

    申请号：US967267

    申请日：1978-12-07

    Applicant: Richard F. Cahill ,  Eric Udd

    Inventor： Richard F. Cahill ,  Eric Udd

    IPC: H01S3/083 ,  G01C19/64 ,  G01C19/72 ,  G01P9/00

    CPC classification number: G01C19/726

    Abstract: A beam of light is split and introduced into different ends of a light path whose rotation is to be sensed. At least one frequency shifter is placed in the light path to affect the frequency difference of the two beams so as to introduce or adjust a nonreciprocal phase shift. The beams are then mixed back together and the resultant beam is detected and analyzed by suitable circuitry to provide an output indicative of rotation of the light path.

    Abstract translation: 光束被分裂并且被引入到要被感测旋转的光路的不同端部。 至少一个频移器被放置在光路中以影响两个光束的频率差，以便引入或调整非相互相移。 然后将光束混合在一起，并且合成的光束被合适的电路检测和分析，以提供指示光路的旋转的输出。

    Fiber grating strain sensors for civil structures
    36.
    发明申请
    Fiber grating strain sensors for civil structures 审中-公开
    用于民用结构的光纤光栅应变传感器

    公开(公告)号：US20050236559A1

    公开(公告)日：2005-10-27

    申请号：US11078896

    申请日：2005-03-11

    Applicant: Sean Calvert ,  Jason Mooney ,  Eric Udd

    Inventor： Sean Calvert ,  Jason Mooney ,  Eric Udd

    IPC: G01D5/353 ,  G01J1/42 ,  G01M11/08

    CPC classification number: G01M11/086 ,  G01D5/35383

    Abstract: A fiber grating strain sensor package that is optimized for axial strain sensitivity and usage on a civil structure that may be a bridge or building is described in this invention. Transverse strain effects are minimized and axial strain sensitivity is enhanced through the design of a substrate with an optimized geometry. These sensors have been deployed and tested on a bridge demonstrating very high sensitivity and the ability of this design to be packaged in an environmentally rugged housing necessary for a commercially successful product.

    Abstract translation: 在本发明中描述了针对可能是桥梁或建筑物的民用结构的轴向应变敏感性和使用优化的光纤应变传感器封装。 通过设计具有优化几何形状的基板，可以使横向应变效应最小化并提高轴向应变灵敏度。 这些传感器已经在桥上部署和测试，显示出非常高的灵敏度，并且该设计的能力被包装在商业上成功的产品所需的环境坚固的外壳中。

    Fiber grating pressure wave speed measurement system
    37.
    发明申请
    Fiber grating pressure wave speed measurement system 审中-公开
    光纤光栅压力波速度测量系统

    公开(公告)号：US20050201664A1

    公开(公告)日：2005-09-15

    申请号：US11071278

    申请日：2005-03-03

    Applicant: Eric Udd ,  Sean Calvers

    Inventor： Eric Udd ,  Sean Calvers

    IPC: G02B6/00

    CPC classification number: G01L23/16 ,  G02B6/022

    Abstract: A fiber grating strain sensing system is used to locate and characterize a high speed environmental event that destroys one or more fiber grating strain sensors as it passes them. The system is very suitable for the detection and characterization of a high intensity pressure wave such as a blast wave due to a detonation. A fiber grating strain sensor is oriented so that the high speed environmental effect passes over it and its reflective spectral profile changes as portions of the fiber grating strain sensor are destroyed. The reflective spectral profile from one or more fiber grating strain sensors are then mixed with the spectral profile of an optical filter onto a high speed output detector. A reference detector may be used to normalize the output signal. The spectral profiles of the fiber grating strain sensors and optical filter may be arranged in several ways that are effective including substantially matching both profiles, establishing opposite spectral slopes and utilization of an optical filter with a substantially flat spectral profile.

    Abstract translation: 纤维光栅应变传感系统用于定位和表征在通过一根或多根光纤光栅应变传感器时破坏一个或多个光纤应变传感器的高速环境事件。 该系统非常适用于高强度压力波的检测和表征，如爆炸引起的爆炸波。 光纤光栅应变传感器被定向成使得高速环境效应越过它，并且随着光纤光栅应变传感器的部分被破坏，其反射光谱轮廓变化。 然后将来自一个或多个光纤光栅应变传感器的反射光谱轮廓与光学滤波器的光谱轮廓混合到高速输出检测器上。 可以使用参考检测器对输出信号进行归一化。 纤维光栅应变传感器和光学滤波器的光谱轮廓可以以有效的几种方式布置，包括基本上匹配两个轮廓，建立相反的谱斜率和利用具有基本上平坦的谱分布的滤光器。

    Fiber grating bond joint health monitoring system
    38.
    发明授权
    Fiber grating bond joint health monitoring system 有权
    光纤光栅键合联合健康监控系统

    公开(公告)号：US06756580B2

    公开(公告)日：2004-06-29

    申请号：US10458109

    申请日：2003-06-10

    Applicant: Whitten Lee Schulz ,  Eric Udd

    Inventor： Whitten Lee Schulz ,  Eric Udd

    IPC: G01J104

    CPC classification number: G01N21/774 ,  G01M3/165 ,  G01M3/38 ,  G01N2021/7723 ,  G02B6/022

    Abstract: Fiber grating environmental measurement systems are comprised of sensors that are configured to respond to changes in moisture or chemical content of the surrounding medium through the action of coatings and plates inducing strain that is measured. These sensors can also be used to monitor the interior of bonds for degradation due to aging, cracking, or chemical attack. Means to multiplex these sensors at high speed and with high sensitivity can be accomplished by using spectral filters placed to correspond to each fiber grating environmental sensor. By forming networks of spectral elements and using wavelength division multiplexing arrays of fiber grating sensors may be processed in a single fiber line allowing distributed high sensitivity, high bandwidth fiber optic grating environmental sensor systems to be realized.

    Abstract translation: 光纤光栅环境测量系统由传感器组成，传感器被配置为通过涂层和板的作用来响应周围介质的湿度或化学成分的变化，诱导测量的应变。 这些传感器也可用于监测由于老化，开裂或化学侵蚀而导致的结合物内部的退化。 可以通过使用放置为对应于每个光纤光栅环境传感器的光谱滤波器来实现以高速和高灵敏度复用这些传感器的手段。 通过形成光谱元件的网络并使用光纤光栅传感器的波分复用阵列可以在单个光纤线路中进行处理，从而实现分布式高灵敏度，高带宽光纤光栅环境传感器系统。

    Fiber optic pressure transducers and pressure sensing system incorporating same
    39.
    发明授权
    Fiber optic pressure transducers and pressure sensing system incorporating same 失效
    光纤压力传感器和压力传感系统

    公开(公告)号：US5841131A

    公开(公告)日：1998-11-24

    申请号：US888566

    申请日：1997-07-07

    Applicant: Robert J. Schroeder ,  Eric Udd

    Inventor： Robert J. Schroeder ,  Eric Udd

    IPC: G01L1/24 ,  G01L11/00 ,  G01L11/02 ,  H01J5/16

    CPC classification number: G01L1/246 ,  G01D3/036 ,  G01D5/344 ,  G01D5/35316 ,  G01L11/025

    Abstract: A fiber optic pressure transducer having enhanced resolution and dynamic range includes a fiber optic core having one or more gratings written onto it, a birefringence structure for enhancing the birefringence of the core, and a structure for converting isotropic pressure forces to anisotropic forces on the fiber core. Several different embodiments of prestressing structure are disclosed (both extrinsic and intrinsic). Several different embodiments of structure (both extrinsic and intrinsic) for converting isotropic pressure to anisotropic pressure are also disclosed. The fiber optic pressure transducer according to the invention is advantageously used in conjunction with a light source and a spectral demodulation system in order to detect pressure ambient to the fiber optic pressure transducer based on the wavelength and shift of spectral peaks.

    Abstract translation: 具有增强的分辨率和动态范围的光纤压力传感器包括具有写入其上的一个或多个光栅的光纤芯，用于增强芯的双折射的双折射结构，以及用于将各向同性压力转换成纤维上的各向异性力的结构 核心。 公开了预应力结构的几个不同的实施例（外部和内在的）。 还公开了用于将各向同性压力转换成各向异性压力的结构的两个不同的实施例（外在和内在）。 根据本发明的光纤压力传感器有利地与光源和光谱解调系统结合使用，以便基于光谱峰值的波长和偏移来检测光纤压力传感器的压力环境。

    Fiber optic grating and etalon sensor systems
    40.
    发明授权
    Fiber optic grating and etalon sensor systems 失效
    光纤光栅和标准具传感器系统

    公开(公告)号：US5646401A

    公开(公告)日：1997-07-08

    申请号：US577506

    申请日：1995-12-22

    Applicant: Eric Udd

    Inventor： Eric Udd

    IPC: G01D5/353 ,  G01J9/02

    CPC classification number: G01D5/35383

    Abstract: Fiber optic grating and etalon based fiber sensor systems are described that include an all solid state demodulation system with no moving parts. This demodulation system is based on using interference patterns generated by reflections from fiber gratings or etalons and measurements using an optical detector array. This demodulation system is applied to dual overlaid fiber optic gratings that have been written onto noncircularly symmetric birefringent optical fibers. These fiber grating based sensors may be used to measure transverse strain, longitudinal strain and temperature at a single location simultaneously and their nonsymmetric nature allows accurate placement and alignment of the strain sensing axes in materials.

    Abstract translation: 描述了光纤光栅和基于标准具的光纤传感器系统，其包括没有移动部件的全固态解调系统。 该解调系统基于使用由光纤光栅或标准具的反射产生的干涉图案和使用光学检测器阵列的测量。 该解调系统被应用于已经写入非圆形对称双折射光纤的双重重叠的光纤光栅。 这些基于光纤光栅的传感器可用于同时测量单个位置的横向应变，纵向应变和温度，并且其非对称性质允许应变感测轴在材料中的精确放置和对准。

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