General Electric Company

Ge-hitachi Nuclear Energy Americas LLC

Nuovo Pignone Spa

Hua Xia

Kevin Thomas McCarthy

Kung-Li Justin Deng

Renato Guida

Juntao Wu

Glen Peter Koste

Avinash Vinayak Taware

Victor Petrovich Ostroverkhov

Boon Kwee Lee

Xiaolei Shi

Danian Zheng

Sachin Narahari Dekate

Axel Busboom

Yun Li

Clayton Ming Young

Xinghua Wang

John Erik Hershey

Norman Arnold Turnquist

Pierino Gianni Bonanni

Mark Lewis Grabb

Zhiyuan Ren

Michael Joseph Krok

Jian Zhang

Aaron John Avagliano

Xuefeng Wang

Qin Chen

Eric John Ruggiero

Ertan Yilmaz

Aditya Kumar

Lawrence Guy Ten Eyck

Jeffrey Scott Goldmeer

Peter John Eisenzopf

David John Allcock

Roy Paul Swintek

Lynn Elizabeth Lynam

Cheryl Zhan

Bugra Han Ertas

Kevin George Harding

Christopher Edward Wolfe

William Albert Challener

Kevin Matthew Durocher

Thomas Bert Gorczyca

Steven Mitchell Falk

Charles Erklin Seeley

David Michael Davenport

Christopher Anthony Kaminski

Glenn Scott Claydon

James Michael Storey

James Scott Vartuli

Fulton Jose Lopez

Anis Zribi

George Theodore Dalakos

Mahadevan Balasubramaniam

Raymond Jensen

Stacey Joy Kennerly

Guiju Song

David So Keung Chan

Kenneth Lee Fisher

Min-Yi Shih

Kuna Venkat Satya Rama Kishore

Kevin Paul McEvoy

James Daniel Antalek

Bowden Kirkpatrick

Huageng Luo

Anthony James George

Alexander Seth Ross

Yu Zhao

Bala Corattiyil

Russell Stephen DeMuth

David Robert O'Connor

Jianming Zheng

Haiyan Sun

James Gerard Lopez

Jeffrey James Andritz

Ravindra Annigeri

Hunt Adams Sutherland

Thomas Ernst Dinjus

Chun Zhan

Jie Jiang

Zhihong Roy Mao

James Thomas Clark

Richard Gawrelski

Paul Jeffrey Gillespie

Matthew Kaminske

Gelu Comanescu

Ajit Achuthan

Pramod Chamarthy

Sunilkumar Onkarnath Soni

Matthew Damian Pietrzykowski

Abdul Rahman Abdallah Al-Khalidy

Robert Charles Deveaux

Michael James Palleschi

Xeufeng Wang

John Thomas Garrity

Dennis Anthony Pasquarella

Daniel Francis Strauch

Shashank Nath Khandavalli

Aniceto Bantug

Mosharraf Hossain

Daniel Fishman

Optical-based apparatus and method for sensing parameters in connection with an asset, such as a pipeline, are provided. At least two sites in an optical fiber may include a respective fiber grating arranged to have a respective optical response in a wavelength spectrum having a distinguishing feature indicative of a value of a respective local parameter at a respective grating site. The two fiber gratings may be further arranged to form, in combination with a respective portion of the optical fiber which extends between the two sites, respective optical backscatter portions that when combined with one another are effective to sense an optical change in the fiber portion between the sites indicative of a value of a distributed parameter. This is a parameter modality different from a parameter modality of the respective local parameters at the respective grating sites.

Fiber optic sensing apparatus including fiber gratings and method for sensing parameters involving different parameter modalities

The present techniques provide methods and systems for recording micro-holograms on a holographic disk using a plurality of counter-propagating light beams in parallel. The parallel counter-propagating light beams overlap to form interference patterns on a data layer and over multiple data tracks in the holographic disk. Rotating the disk enables the parallel recording of micro-holograms over multiple data tracks, thus reducing recording time. Further, the illumination pattern may include illuminated spots and non-illuminated regions, such that each illumination spot may cover a relatively small fraction of the data layer plane, possibly controlling the depth spread of the recorded micro-hologram. In some embodiments, data in the parallel signal beams may be retrieved from a master holographic disk or may be modulated into the parallel signal beams.

Replication and formatting method and system for bit-wise holographic storage

A dynamic fiber temperature sensing package is provided herein. The sensing package includes a support structure, a holder coupled to the support structure, a sheath coupled to the support structure via the holder, and a fiber optic temperature sensor positioned within the sheath. The holder includes a material having a first thermal conductivity and the sheath includes a material having a second thermal conductivity, wherein the second thermal conductivity is greater than the first thermal conductivity.

Dynamic fiber temperature sensing package and method of assembling the same

In one aspect, a system for monitoring load-related parameters of a rotor blade of a wind turbine is disclosed. The system may generally include a plurality of reflective targets positioned within the rotor blade. Each reflective target may include a unique visual identifier. In addition, the system may include a light source configured to illuminate the reflective targets and a sensor configured to detect light reflected from the reflective targets.

System and method for monitoring load-related parameters of a wind turbine rotor blade

A fiber gas sensor including a core fiber comprising at least one Bragg grating region, a fiber cladding in contact with the core fiber along an entire length of the core fiber, and a sensing matrix structure disposed upon the outer surface of the fiber cladding along a portion of the length of the fiber cladding and surrounding the fiber Bragg grating region. The sensing matrix structure comprising a bonding layer disposed on the outer surface of the fiber cladding layer, a nano-structured trampoline matrix layer disposed on the outer surface of the bonding layer and a capping layer disposed on the outer surface of the matrix layer. The thermally modulated response amplitude of the fiber gas sensor is found to linearly depend upon the gas molecular weight, and can be directly used to determine heat specific capacity ratio of Cp/Cv.

Nano-structured trampoline fiber gas sensor

The present application provides a fiber optic sensor system. The fiber optic sensor system may include a small diameter bellows, a large diameter bellows, and a fiber optic pressure sensor attached to the small diameter bellows. Contraction of the large diameter bellows under an applied pressure may cause the small diameter bellows to expand such that the fiber optic pressure sensor may measure the applied pressure.

High pressure fiber optic sensor system

A hydrogen purity sensing system includes a light source which provides an optical signal through a fiber optic cable. A hydrogen purity sensor is provided in the system which comprises a multilayered nanostructural film of high refractive index and low refractive index materials for receiving the optical signal. The system further includes a photodetector for receiving a reflected optical signal from the hydrogen purity sensor and a processing circuitry coupled to the photodetector for analyzing the reflected optical signal.

Fiber optic hydrogen purity sensor and system

A gas detection system is provided for identifying a gas. The gas detection system includes a sensing module with a hollow chamber enclosed by a chamber housing. Additionally, the sensing module includes an optical sensing fiber positioned within the hollow chamber. The optical sensing fiber includes a gas sensor including a fiber Bragg grating positioned at a grating location along the optical sensing fiber, and a sensing layer affixed to an exterior surface of the optical sensing fiber at the grating location. After the gas is directed into the hollow chamber, the sensing layer and the gas exchange heat energy, based in part on a heat transfer coefficient of the gas. The exchange of the heat energy induces a shift in a Bragg resonant wavelength of the fiber Bragg grating which exceeds a threshold shift required for detection, where the shift is used to identify the gas.

Gas detection system incorporating fiber gas sensors having fiber bragg gratings

A system is provided for monitoring a relative displacement of a pair of end-winding components. The system includes a structure mounted to the end-winding components at an angle with respect to the end-winding components for monitoring the relative displacement. The system further includes an optical fiber with a first portion including a fiber Bragg grating mounted to a surface of the structure to experience a strain resulting from a strain of the structure due to the relative displacement. The optical fiber includes a second portion internally routed through in the structure to the first portion mounted to the surface. The structure is configured so that the strain produced by the structure limits a magnitude of the strain of the fiber Bragg grating within a predetermined range over a span of the relative displacement of the end-winding components.

System for monitoring a relative displacement of components

An optical gamma thermometer includes a metal mass having a temperature proportional to a gamma flux within a core of a nuclear reactor, and an optical fiber cable for measuring the temperature of the heated metal mass. The temperature of the heated mass may be measured by using one or more fiber grating structures and/or by using scattering techniques, such as Raman, Brillouin, and the like. The optical gamma thermometer may be used in conjunction with a conventional reactor heat balance to calibrate the local power range monitors over their useful in-service life. The optical gamma thermometer occupies much less space within the in-core instrument tube and costs much less than the conventional gamma thermometer.

Optical gamma thermometer

A carbon dioxide (CO2) purity sensor package includes a fiber core, a periodic refractive index modulated fiber grating structure within the fiber core and a fiber cladding. A thermally conductive sensing layer is positioned about a portion of the fiber cladding surrounding the periodic refractive index modulated fiber grating structure. A gas chamber encloses the fiber cladding with the thermally conductive sensing layer.

Fiber optic carbon dioxide purity sensor package and system

An electrical machine component monitoring system includes a light source that provides an optical signal through a fiber optic cable and a fiber optic sensing component positioned on the electrical machine component or at a standoff distance from the electrical machine component to obtain a responsive optical signal representative of a condition of the electrical machine component. The system further includes a photodetector to receive the responsive optical signal from the fiber optic sensing component and to convert the responsive optical signal to an electrical signal. A processing circuitry is also provided in the system for determining information regarding dirt on the electrical machine component by analyzing the electrical signal.

Electrical machine component monitoring system and method

A system is provided for monitoring a relative displacement of a pair of end-winding components. The system includes a structure mounted to the end-winding components. The system further includes a fiber Bragg grating mounted to a non-curved surface of the structure, where the fiber Bragg grating is configured to reflect incident radiation having a peak intensity at a respective wavelength based on a strain of the fiber Bragg grating. The structure is configured so that the strain produced by the structure limits a magnitude of the strain of the fiber Bragg grating within a predetermined range over a span of the relative displacement of the pair of end-winding components.

In one aspect, the present invention provides a hermetically sealed fiber sensing cable comprising: a core fiber comprising at least one Bragg grating region, an outer surface and a length; a fiber cladding in contact with the core fiber along the entire length of the core fiber, the fiber cladding having an outer surface and a length; a carbon layer disposed upon the outer surface of the fiber cladding along the entire length of the fiber cladding, the carbon layer comprising diamond-like carbon; a hydrogen ion absorption layer in contact with the carbon layer, the hydrogen ion absorption layer being disposed on the outer surface of the carbon layer; and an outer sleeve. Also provided in another aspect of the present invention, is a component for a hermetically sealed fiber sensing cable.

Hermetically sealed fiber sensing cable

A device operating in an environment includes a fiber optic sensing system having one or more fiber optic sensors disposed in the device and configured to detect one or more parameters related to the device. The parameters may include temperature, strain, pressure, vibration, or combinations thereof.

Embedded fiber optic sensing device and method

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Altamont, NY, United States of America

Hua Xia