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    A gravity orientation sensor
    2.
    发明专利
    A gravity orientation sensor 未知

    公开(公告)号：GB2467068A

    公开(公告)日：2010-07-21

    申请号：GB201007608

    申请日：2006-02-08

    Applicant: PGS AMERICAS INC

    Inventor： MAAS STEVEN J ,  METZBOWER D RICHARD

    IPC: E21B47/022 ,  G01C9/02 ,  G01P15/093 ,  G01P15/18 ,  G01V1/18 ,  H04R23/00

    Abstract: The gravity orientation sensor comprises at least one optical fibre 44 having a Bragg grating 45 thereon, the fibre operatively coupled to a mass 42, the mass mounted in a frame such that orientation of the frame with respect to Earth's gravity enables Earth's gravity to act correspondingly on the mass, the operative coupling of the fibre to the mass arranged such that a change in wavelength of reflected from the grating in the fibre corresponds to the action of Earth's gravity on the mass; and means for measuring a change in wavelength or period of the Bragg grating. Snubbers 41 block movement of the mass so that the Bragg grating is strained to create a wavelength shift. The sensor may comprise three sensors orthogonally arranged in a system, and each sensor may comprise an accelerometer.

    Gravity orientation system comprising three optical fibre accelerometers
    6.
    发明专利
    Gravity orientation system comprising three optical fibre accelerometers 未知

    公开(公告)号：GB2467069A

    公开(公告)日：2010-07-21

    申请号：GB201007610

    申请日：2006-02-08

    Applicant: PGS AMERICAS INC

    Inventor： MAAS STEVEN J ,  METZBOWER D RICHARD

    IPC: E21B47/022 ,  G01C9/02 ,  G01P15/093 ,  G01P15/18 ,  G01V1/18 ,  H04R23/00

    Abstract: A gravity orientation system, comprising three accelerometers, each accelerometer comprising a beam (12, figure 1) supported at the longitudinal ends thereof in a frame, and at least one optical fibre 14A, which includes a Bragg grating 14B, affixed to one side of the beam such that deflection of the beam changes a length of the optical fibre, the three accelerometers oriented to be sensitive to acceleration at least in part along mutually orthogonal directions. A light source 24A is optically coupled to one end of the fibre 14A through a beam splitter 25. A photodetector 30 is coupled to a spectral analyzer 31. The system may be calibrated such that an orientation with respect to Earth's gravity of a deflecting axis of each beam is determinable by measurement of a change in wavelength of light reflected by the Bragg grating.

    Optical accelerometer, optical inclinometer and seismic sensor system using such accelerometer and inclinometer
    7.
    发明专利
    Optical accelerometer, optical inclinometer and seismic sensor system using such accelerometer and inclinometer 未知

    公开(公告)号：AU2006201171A1

    公开(公告)日：2006-10-19

    申请号：AU2006201171

    申请日：2006-03-21

    Applicant: PGS AMERICAS INC

    Inventor： METZBOWER D RICHARD ,  MAAS STEVEN J

    IPC: G01P15/03 ,  G01P15/00 ,  G01P15/093 ,  G01V1/16 ,  G01V7/04 ,  G01V8/16

    Abstract: An optical accelerometer includes a beam and at least one optical fiber affixed to one side of the beam such that deflection of the beam changes a length of the optical fiber. A device for sensing the change in length of the optical fiber is functionally coupled to the at least one fiber. A seismic sensor system includes at least two accelerometers, oriented such that their sensitive axes are at least partially aligned along mutually orthogonal directions. Each accelerometer includes a beam, and at least one optical fiber affixed to one side of the beam such that deflection of the beam changes a length of the at least one optical fiber. A device for sensing the change in length of the optical fiber is functionally coupled to the at least one fiber of each accelerometer.

    Fiber-optic seismic array telemetry, system, and method
    10.
    发明专利
    Fiber-optic seismic array telemetry, system, and method 未知

    公开(公告)号：GB2391124B

    公开(公告)日：2006-04-12

    申请号：GB0314714

    申请日：2003-06-24

    Applicant: PGS AMERICAS INC

    Inventor： MAAS STEVEN J ,  METZBOWER D RICHARD ,  MCMILLAN IAN

    IPC: H04B10/08 ,  G01V1/22 ,  H04B10/12

    Abstract: A method and system for interrogating a seismic sensor in a seismic cable having modular sensing stations spaced along the seismic cable and a connection module head end of the sensor sections, that includes dropping, at the connection modules, a wavelength of light from an input bus telemetry fiber that includes multiple wavelengths of light, distributing the dropped wavelength of light to the seismic sensor, returning the dropped wavelength from the seismic sensor to a return telemetry fiber, remultiplexing the dropped wavelength of light onto the return bus telemetry, and amplifying, in the seismic cable, the returned dropped wavelength.

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