Litton Systems, Inc.

Avalon Sciences Limited

US Seismic Systems, Inc.

Northrop Grumman Systems Corporation

Pacific Western Bank

US Sensor Systems, Inc.

Sabeus, Inc.

Eric Lee Goldner

Gerald Robert Baker

James Kengo Andersen

Agop Hygasov Cherbettchian

Michael J Tweedy

David Barnett Hall

David T Beatson

Amado Cordova

Jeffrey Carl Buchholz

Thomas McLean

James R Steele

Gary Thomas Griffin

Samuel N Fersht

Ira Jeffrey Bush

Leo K Lam

William Morey

Daniel Eugene Auerbach

Daniel A Tazartes

John G Mark

George A Pavlath

Craig W Hodgson

Ronald James Michal

Ralph A Patterson

Bruce A Danver

Dennis P Bevan

Robert L Kaplan

Patrick J Welton

William Briggs

Lawrence E Bean

Arthur D Lang

John E Higbee

Shen-Hui L Wu

Joseph Scott Salinas

William David Briggs

Afshin Kianpour

Michael L Bean

Peter Karalskos

Ka Kha Wong

Bernard C Fidric

Kenneth Bean

James Kengo Anderson

Gregory M Nau

Clifton B Bosley, Jr

Fred Demetz

Carl J Krantz

Douglas E Holmes

Dennis Patrick Bevan

A personnel monitoring system. The personnel monitoring system includes a host node having an optical source for generating optical signals, and an optical receiver. The personnel monitoring system also includes a plurality of fiber optic sensors for converting at least one of vibrational and acoustical energy to optical intensity information, each of the fiber optic sensors having: (1) at least one length of optical fiber configured to sense at least one of vibrational and acoustical energy; (2) a reflector at an end of the at least one length of optical fiber; and (3) a field node for receiving optical signals from the host node, the field node transmitting optical signals along the at least one length of optical fiber, receiving optical signals back from the at least one length of optical fiber, and transmitting optical signals to the optical receiver of the host node.

Fiber optic personnel safety systems and methods of using the same

A fiber optic sensing system is provided. The fiber optic sensing system includes: at least one fiber optic transducer; an optical backscatter interrogator for interrogating backscatter optical signals from the at least one fiber optic transducer; and an optical fiber between the optical backscatter interrogator and the at least one fiber optic transducer.

Fiber optic backscatter sensing systems and methods of operating the same

A fiber optic transducer is provided. The fiber optic transducer includes a fixed portion configured to be secured to a body of interest, a moveable portion having a range of motion with respect to the fixed portion, a spring positioned between the fixed portion and the moveable portion, and a length of fiber wound between the fixed portion and the moveable portion. The length of fiber spans the spring. The fiber optic transducer also includes a mass engaged with the moveable portion. In one disclosed aspect of the transducer, the mass envelopes the moveable portion.

Fiber optic transducers, fiber optic accelerometers and fiber optic sensing systems

A fiber optic sensor is provided. The fiber optic sensor includes: a fixed portion configured to be secured to a body of interest; a moveable portion; a spring member positioned at least partially between the fixed portion and the moveable portion; an optical fiber wound in contact with the fixed portion and the moveable portion such that the optical fiber spans at least a portion of the spring; and an elastomeric material provided in contact with at least one of the fixed portion, the moveable portion, the spring member, the body of interest, and the optical fiber.

Damped fiber optic accelerometers, sensors, and sensor assemblies, and methods of assembling the same

An optical detection system. The optical detection system includes a host node having (a) an optical source for generating optical signals, and (b) an optical receiver. The optical detection system also includes a plurality of fiber optic sensors for converting at least one of vibrational and acoustical energy to optical intensity information, each of the fiber optic sensors having: (1) at least one length of optical fiber configured to sense at least one of vibrational and acoustical energy; (2) a reflector at an end of the at least one length of optical fiber; and (3) a field node for receiving optical signals from the host node, the field node transmitting optical signals along the at least one length of optical fiber, receiving optical signals back from the at least one length of optical fiber, and transmitting optical signals to the optical receiver of the host node.

Optical detection systems and methods of using the same

A fiber optic security system is provided. The fiber optic security system includes at least one length of fiber optic cable affixed to at least one item to be monitored using the fiber optic security system. The fiber optic security system also includes at least one local control node, the at least one local control node including at least one light source for generating and transmitting light through the at least one length of fiber optic cable, and the at least one local control node monitoring a status of the light. The fiber optic security system also includes a remote control unit for receiving information from the at least one local control node regarding the status of the light.

Fiber optic security systems including a local control node and a remote control unit, and methods of using the same

A remotely actuated clamping device for a borehole seismic sensing system. The remotely actuated clamping device includes a clamping mechanism configured to engage a surface of a borehole by actuation of the clamping mechanism. The remotely actuated clamping device also includes a fluid based actuator configured to actuate the clamping mechanism. The fluid based actuator includes a chamber configured to be kept at a pressure that is isolated from an ambient pressure of the borehole. The fluid based actuator also includes a piston within the chamber. The chamber receives a pressurized fluid to move the piston within the chamber to actuate the clamping mechanism. The pressure used to actuate the clamping mechanism is independent of the ambient pressure of the borehole. Also disclosed are methods of operating the device.

Remotely actuated clamping devices for borehole seismic sensing systems and methods of operating the same

A light powered communications system. The light powered communications system includes an audio control center having at least one optical source and at least one optical receiver. The light powered communications system also includes a plurality of optically powered remote communication systems located remote from the audio control center, each of the optically powered remote communication systems being configured to receive an optical signal from the audio control center. The light powered communication system also includes at least one length of fiber optic cable between the audio control center and each of the optically powered remote communication systems.

Light powered communication systems and methods of using the same

A fiber optic acoustic sensor system. The fiber optic acoustic sensor system includes an optical source, and a fiber optic acoustic sensor array configured to receive an optical signal from the optical source. The fiber optic acoustic sensor array includes a core, a first polymer layer disposed on the core, an optical fiber wound around the first polymer layer, and a second polymer layer disposed on the first polymer layer such that the optical fiber is between the first polymer layer and the second polymer layer.

Fiber optic acoustic sensor arrays and systems, and methods of fabricating the same

An optical detection system for monitoring a pipeline. The optical detection system includes a host node in the vicinity of, or remote from, a pipeline to be monitored. The optical detection system includes (a) an optical source for generating optical signals, and (b) an optical receiver. The optical detection system also includes a plurality of fiber optic sensors local to the pipeline for converting at least one of vibrational and acoustical energy to optical intensity information, each of the fiber optic sensors having: (1) at least one length of optical fiber configured to sense at least one of vibrational and acoustical energy; (2) a reflector at an end of the at least one length of optical fiber; and (3) a field node for receiving optical signals from the host node, the field node transmitting optical signals along the at least one length of optical fiber, receiving optical signals back from the at least one length of optical fiber, and transmitting optical signals to the optical receiver of the host node.

Fiber optic pipeline monitoring systems and methods of using the same

A fiber optic microseismic sensing system is provided. The system includes a plurality of nodes, each of the nodes including a surface portion, an underground portion, and an optical cable extending between the surface portion and the underground portion. The surface portion includes (1) an optical source for transmitting an optical signal along the optical cable to the underground portion, and (2) an optical receiver for receiving a return optical signal propagating along the optical cable from the underground portion. The underground portion includes at least one transducer, each of the at least one transducer including (1) a fixed portion configured to be secured to a body of interest, (2) a moveable portion having a range of motion with respect to the fixed portion, (3) a spring positioned between the fixed portion and the moveable portion, and (4) a mass engaged with the moveable portion. The optical cable includes a length of fiber wound between the fixed portion and the moveable portion of each of the at least one transducer, the length of fiber spanning the spring. In one disclosed aspect of the transducer, the mass envelopes the moveable portion.

Fiber optic microseismic sensing systems

Growing community of inventors

Valencia, CA, United States of America

Eric Lee Goldner