公开(公告)号：US4976507A

公开(公告)日：1990-12-11

申请号：US410856

申请日：1989-09-22

Applicant: Eric Udd

Inventor： Eric Udd

IPC: G01D5/353 ,  G01H9/00

CPC classification number: G01D5/35383 ,  G01H9/004

Abstract: A system based on the usage of a Sagnac interferometer operating in a dual sensing mode is described which allows the determination of the location and amplitude of a time varying disturbance on a single fiber.

公开(公告)号：US4471659A

公开(公告)日：1984-09-18

申请号：US509942

申请日：1983-07-01

Applicant: Eric Udd ,  Richard F. Cahill

Inventor： Eric Udd ,  Richard F. Cahill

IPC: G01H9/00 ,  G01N29/24 ,  G01N29/00

CPC classification number: G01H9/00 ,  G01N29/2418

Abstract: A vibration sensor is formed by coupling the vibration to be sensed to change the positional relationship between grating means and light beams so that the resultant variations in light intensity of the beams beyond the grating means vary with a function of the sine and cosine of the positional change. This allows the detection of the vibrationover a wide range of frequencies and amplitudes.

Abstract translation: 通过将待检测的振动耦合以改变光栅装置和光束之间的位置关系而形成振动传感器，使得超过光栅装置的光束的光强度的合成变化随着位置的正弦和余弦的函数而变化 更改。 这允许检测振动的宽范围的频率和振幅。

公开(公告)号：US20150268096A1

公开(公告)日：2015-09-24

申请号：US13658535

申请日：2012-10-23

Applicant: Eric Udd

Inventor： Eric Udd

IPC: G01J3/18 ,  G01L11/02 ,  G01L1/24 ,  G01J3/10 ,  G01K11/32

CPC classification number: G01J3/1895 ,  G01J3/10 ,  G01J2003/102 ,  G01K11/3206 ,  G01L1/246 ,  G01L11/025

Abstract: A fiber grating sensor system is used to measure key parameters that include pressure, strain and temperature at specific locations and at high speed. The system relies on spectral properties associated with the fiber grating sensors, the light source and the optical detection system to provide these capabilities. The system has been successfully applied to measurement of pressures up to 1,200,000 psi and by increasing the spectral width of the light source extensions of pressure measurements to 4,000,000 psi and higher are possible. Temperature change measurements have been made of 400 degrees C. over a period of 25 micro-seconds limited by the physical response of the fiber sensors and the output detector bandwidth both of which can be greatly improved by reducing fiber sizes and with improved detectors. Novel methods have been devised to lower cost and enable measurements with spatial location, speed and accuracy that have been very difficult or not yet achieved.

Abstract translation: 光纤光栅传感器系统用于测量关键参数，包括特定位置和高速下的压力，应变和温度。 该系统依赖于与光纤光栅传感器，光源和光学检测系统相关联的光谱性质来提供这些能力。 该系统已经成功应用于高达1,200,000psi的压力测量，并且通过将压力测量的光源延伸的光谱宽度增加到4,000,000psi和更高是可能的。 通过光纤传感器的物理响应和输出检测器带宽限制的25微秒的时间内，温度变化测量已经达到400摄氏度，两者都可以通过减小光纤尺寸和改进的检测器而大大提高。 已经设计了新的方法来降低成本并且使得具有非常困难或尚未实现的空间位置，速度和精度的测量。

公开(公告)号：US20120323075A1

公开(公告)日：2012-12-20

申请号：US13594629

申请日：2012-08-24

Applicant: Robert G. Younge ,  Bhaskar S. Ramamurthy ,  Neal A. Tanner ,  Randall L. Schlesinger ,  Eric Udd

Inventor： Robert G. Younge ,  Bhaskar S. Ramamurthy ,  Neal A. Tanner ,  Randall L. Schlesinger ,  Eric Udd

IPC: A61B1/01 ,  G02B6/00

CPC classification number: G02B6/022 ,  A61B5/1076 ,  A61B5/6852 ,  A61B2017/00039 ,  A61B2017/00053 ,  A61B2034/2061 ,  A61B2090/067

Abstract: A method for measuring bending is provided. The method includes receiving a reflected signal from a strain sensor provided on an optical fiber; determining a spectral profile of the reflected signal; and determining bending of the optical fiber based on a comparison of the spectral profile of the reflected signal with a predetermined spectral profile.

Abstract translation: 提供了一种测量弯曲的方法。 该方法包括从设置在光纤上的应变传感器接收反射信号; 确定反射信号的光谱分布; 以及基于所述反射信号的光谱轮廓与预定光谱轮廓的比较来确定所述光纤的弯曲。

公开(公告)号：US20090123111A1

公开(公告)日：2009-05-14

申请号：US12236478

申请日：2008-09-23

Applicant: Eric Udd

Inventor： Eric Udd

IPC: G02B6/00

CPC classification number: G01D5/35303 ,  A61B5/06 ,  A61B5/065 ,  A61B5/066 ,  A61B34/77 ,  A61B2034/2061 ,  A61B2034/301 ,  A61B2034/305 ,  A61B2090/064

Abstract: Systems and methods comprise or involve optical fibers having Bragg gratings. The optical fibers can be assembled in a parallel manner into a fiber sensor configuration. Bragg gratings can be written onto different cores of optical fibers. Bragg gratings may be written at a same or nearly same axial position for all optical fibers in the configuration and may be written at the same time and may have a substantially equal index of refraction variation and unequal lengths. Spaced Bragg gratings may also have characteristic sidelobe spectrums for tagging the respective gratings. Gratings can also be written at different wavelengths and over another grating at the same location.

Abstract translation: 系统和方法包括或涉及具有布拉格光栅的光纤。 光纤可以以平行方式组装成光纤传感器配置。 布拉格光栅可以写在不同的光纤芯上。 布拉格光栅可以写在相同或几乎相同的轴向位置，用于配置中的所有光纤，并且可以同时写入，并且可以具有基本上相等的折射率变化和不相等的长度。 间隔布拉格光栅还可以具有用于标记相应光栅的特征旁瓣光谱。 光栅也可以写在不同的波长上，并在同一位置的另一个光栅上。

公开(公告)号：US06690890B1

公开(公告)日：2004-02-10

申请号：US09520772

申请日：2000-03-08

Applicant: Eric Udd ,  Michael M. Morrell ,  Peter F. Snawerdt, III

Inventor： Eric Udd ,  Michael M. Morrell ,  Peter F. Snawerdt, III

IPC: H04B1000

CPC classification number: H04B10/50 ,  H04B10/505

Abstract: The system includes a generally broadband, low coherence length light source that injects light into a fiber beamsplitter that is used to generate counterpropagating light beams in a Sagnac loop. The loop includes two facing fiber beamsplitters connected together at differing length inner legs, with one of the output legs of the second beamsplitter usually being connected to a in place optical fiber that ends with a phase modulator followed by a mirror. Formatted data is transmitted by impressing relative phase differences between the counterpropagating light beams. Optimum performance depends on appropriate choices for critical lengths in the system.

Abstract translation: 该系统包括通常宽带的低相干长度光源，其将光注入到用于在Sagnac回路中产生反向传播光束的光纤分束器中。 该环路包括两个不同长度的内部支脚连接在一起的面向光纤分束器，其中一个第二分束器的输出支路通常连接到以相位调制器后跟反射镜结束的就绪光纤。 格式化的数据通过压倒反向传播光束之间的相对相位差来传输。 最佳性能取决于系统中关键长度的适当选择。

公开(公告)号：US06683297B2

公开(公告)日：2004-01-27

申请号：US10457845

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。

公开(公告)号：US06600149B2

公开(公告)日：2003-07-29

申请号：US09746037

申请日：2000-12-22

Applicant: Whitten L. Schulz ,  Eric Udd

Inventor： Whitten L. Schulz ,  Eric Udd

IPC: G01J142

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。

公开(公告)号：US06459486B1

公开(公告)日：2002-10-01

申请号：US09520771

申请日：2000-03-08

Applicant: Eric Udd ,  Michael M. Morrell

Inventor： Eric Udd ,  Michael M. Morrell

IPC: G01B902

CPC classification number: G01H9/004

Abstract: The system includes a generally broadband, low coherence length light source that injects light into a fiber beamsplitter that is used to generate counterpropagating light beams in a Sagnac loop. The loop includes two facing fiber beamsplitters connected together at differing length inner legs, with one of the output legs of the second beamsplitter usually being connected to an optical fiber that ends with a phase modulator followed by a mirror. Environmental effects at the optical fiber impress relative phase differences between the counterpropagating light beams, which are detected from an interferometric signal that results therefrom.

Abstract translation: 该系统包括通常宽带的低相干长度光源，其将光注入到用于在Sagnac回路中产生反向传播光束的光纤分束器中。 该环路包括两个不同长度的内部支腿连接在一起的面向光纤分束器，第二分束器的一个输出支路通常连接到以相位调制器后跟反射镜的光纤上。 在光纤上的环境影响使得从由此产生的干涉信号中检测到的反向传播光束之间产生相对相位差。

公开(公告)号：US5636021A

公开(公告)日：1997-06-03

申请号：US458781

申请日：1995-06-02

Applicant: Eric Udd

Inventor： Eric Udd

IPC: G01D5/353 ,  G01B9/02

CPC classification number: G01M11/39 ,  G01D5/35383

Abstract: A Sagnac/Michelson distributed sensor is described that is capable of locating the position and amplitude of a time varying environmental signal as well as measuring locally and regionally slowly varying environmental signals. The sensor consists of a Sagnac interferometric loop into which spectrally reflective elements that may be fiber gratings have been placed. A Sagnac interferometric signal derived from counterpropagating beams in the Sagnac loop is used in combination with signals derived from reflected light beams off the spectrally reflective elements in the Sagnac loop which are combined in Michelson interferometer readouts to allow the measurement of environmental signals. Applications of the Sagnac/Michelson sensor include the measurement strains and acoustic sources in buildings, bridges, dams and aerospace platforms. Other applications include the localization of insect infestations in grain storage areas and termites in wooden structures.

Abstract translation: 描述了能够定位时变环境信号的位置和幅度以及局部地区和区域上缓慢变化的环境信号的Sagnac / Michelson分布传感器。 传感器由Sagnac干涉测量回路组成，其中可以放置可能是光纤光栅的光谱反射元件。 来自Sagnac环路的反向传播光束的Sagnac干涉信号与Sagnac环路中的光谱反射元件的反射光束相结合的信号结合使用，该信号被组合在迈克尔逊干涉仪读数中以允许测量环境信号。 Sagnac / Michelson传感器的应用包括建筑物，桥梁，水坝和航空航天平台中的测量应变和声源。 其他应用包括昆虫侵染在粮食储存区域和木结构中的白蚁的定位。