James R Andersen

US Patent:

7999946, Aug 16, 2011

Filed:

Oct 16, 2008

Appl. No.:

12/253161

Inventors:

James K. Andersen - Westlake Village CA, US
Eric Lee Goldner - Valencia CA, US
Leo Lam - Calabasas CA, US
William Morey - Porter Ranch CA, US
Ira Jeffrey Bush - Los Angeles CA, US
Gerald Baker - West Hills CA, US

Assignee:

US Sensor Systems, Inc. - Valencia CA

International Classification:

G01B 9/02

US Classification:

356479

Abstract:

A sensor apparatus combines an optical sensor in which acceleration, acoustic velocity, or displacement (vibration) causes a corresponding shift in the center wavelength of the sensor output, coupled to a high speed interferometric interrogator, through an unbalanced fiber interferometer. The unbalanced interferometer functions to translate optical wavelength shift into phase shift, which is easily demodulated by the interrogator.

US Patent:

8240207, Aug 14, 2012

Filed:

Jul 26, 2011

Appl. No.:

13/190516

Inventors:

James K. Andersen - Westlake Village CA, US
Eric Lee Goldner - Chatsworth CA, US
Leo Lam - Chatsworth CA, US
William Morey - Chatsworth CA, US
Ira Jeffrey Bush - Chatsworth CA, US
Gerald Baker - West Hills CA, US

Assignee:

US Seismic Systems, Inc. - Chatsworth CA

International Classification:

G01P 15/093
G01B 9/02

US Classification:

7351427, 356477, 356480

Abstract:

An optical sensor in which acceleration, acoustic velocity, or displacement (vibration) causes a corresponding shift in the center wavelength of the sensor output. The sensor can be coupled to a high-speed interferometric interrogator through an unbalanced fiber interferometer. The unbalanced interferometer functions to translate optical wavelength shift into phase shift, which is easily demodulated by the interrogator. A method of measuring acceleration uses the sensor.

US Patent:

20110206369, Aug 25, 2011

Filed:

Aug 4, 2010

Appl. No.:

12/850005

Inventors:

Eric Lee Goldner - Valencia CA, US
Gerald Robert Baker - West Hills CA, US
James Kengo Andersen - Westlake Village CA, US

Assignee:

US Sensor Systems, Inc. - Northridge CA

International Classification:

H04B 10/08

US Classification:

398 25

Abstract:

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.

US Patent:

20120006109, Jan 12, 2012

Filed:

Jul 5, 2011

Appl. No.:

13/176210

Inventors:

James Kengo Andersen - Westlake Village CA, US
Eric Lee Goldner - Valencia CA, US
Peter Karaiskos - Simi Valley CA, US

Assignee:

US Seismic Systems, Inc. - Chatsworth CA

International Classification:

E21B 47/00

US Classification:

7315254

Abstract:

A sensing system configured for use in a borehole. The sensing system includes a body portion and a clamp arm engaged with the body portion. The clamp arm is configured to move between a retracted position and an extended position. The sensing system also includes an energy storage element engaged with the body portion. The energy storage element provides energy to move the clamp arm from the retracted position to the extended position. A method of using the sensing system is also provided.

US Patent:

20120216615, Aug 30, 2012

Filed:

May 4, 2012

Appl. No.:

13/464547

Inventors:

James K. Andersen - Westlake Village CA, US
Eric Lee Goldner - Valencia CA, US
Leo Lam - Chatsworth CA, US
William Morey - Chatsworth CA, US
Ira Jeffrey Bush - Chatsworth CA, US
Gerald Baker - West Hills CA, US

Assignee:

US Seismic Systems, Inc. - Chatsworth CA

International Classification:

G01P 15/08

US Classification:

7351427

Abstract:

A method of measuring acceleration using an optical sensor. In the optical sensor, acceleration, acoustic velocity, or displacement (vibration) causes a corresponding shift in the center wavelength of the sensor output. The sensor can be coupled to a high-speed interferometric interrogator through an unbalanced fiber interferometer. The unbalanced interferometer functions to translate optical wavelength shift into phase shift, which is easily demodulated by the interrogator.

US Patent:

20120227504, Sep 13, 2012

Filed:

Mar 7, 2012

Appl. No.:

13/414157

Inventors:

Eric Lee Goldner - Valencia CA, US
James Kengo Andersen - Westlake Village CA, US

Assignee:

US Seismic Systems, Inc. - Chatsworth CA

International Classification:

G01H 9/00
B29C 70/08

US Classification:

73655, 156172

Abstract:

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.

US Patent:

20120257208, Oct 11, 2012

Filed:

Oct 22, 2010

Appl. No.:

13/263342

Inventors:

James Kengo Andersen - Westlake Village CA, US
Eric Lee Goldner - Valencia CA, US
Gerald Robert Baker - West Hills CA, US
David T. Beatson - Kennett Square PA, US

International Classification:

G01B 9/02
G02B 6/00
G01P 15/00

US Classification:

356477, 73488, 385 13

Abstract:

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.

US Patent:

20120257209, Oct 11, 2012

Filed:

Oct 22, 2010

Appl. No.:

13/263850

Inventors:

James Kengo Andersen - Westlake Village CA, US
Eric Lee Goldner - Valencia CA, US
Gerald Robert Baker - West Hills CA, US
David T. Beatson - Kennett Square PA, US

International Classification:

G01V 1/18
G02B 6/00

US Classification:

356477, 385 13

Abstract:

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.