Patents by Inventor Jon Thomas Kringlebotn
Jon Thomas Kringlebotn has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10677945Abstract: The invention relates to a hydrophone housing. The housing comprises an outer casing with an exterior shape being in close contact with sediment when buried therein and having a deflectable wall part. Solid material partly fills the casing to define an outer chamber behind the deflectable wall part, a cavity shaped so that an inner chamber is defined immediately surrounding a hydrophone sensing element held therein, and a first duct for liquid flow communication between the outer chamber and the cavity or an internal volume of the hydrophone sensing element. Thereby, a hydraulic coupling is provided so that an acoustic pressure causing small radial displacements of outer surface of the housing will, via liquid in the first duct, cause large radial displacements of the hydrophone sensitive element.Type: GrantFiled: May 24, 2013Date of Patent: June 9, 2020Assignee: OPTOPLAN ASInventors: Roar Furuhaug, Jon Thomas Kringlebotn
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Patent number: 9703007Abstract: There is provided a solid seismic streamer cable for use in seismic surveying in marine environments. The streamer is characterized by a buffer layer 2 which is provided with a cut-out 50 and a sensor element arranged in the cut-out 50. There is also provided an associated hydrophone for integration into the seismic streamer cable. The hydrophone is characteristic in a split-element sensor base 10, 11 being suited for efficient mounting into the cut-outs 50 of the seismic cable. There is also provided an associated accelerometer for integration into the seismic streamer cable. The accelerometer is characteristic by a split-element sensor base 30, 35 for being efficiently arranged into the cut-outs 50 of the seismic cable. A method of producing a seismic streamer cable according to the invention incorporating a hydrophone or accelerometer according to the invention is also provided.Type: GrantFiled: October 4, 2013Date of Patent: July 11, 2017Assignee: OPTOPLAN ASInventors: Arne Berg, Jon Thomas Kringlebotn
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Patent number: 9042202Abstract: There is provided a solid seismic streamer cable for use in seismic surveying in marine environments. The streamer is characterized by a buffer layer 2 which is provided with a cut-out 50 and a sensor element arranged in the cut-out 50. There is also provided an associated hydrophone for integration into the seismic streamer cable. The hydrophone is characteristic in a split-element sensor base 10, 11 being suited for efficient mounting into the cut-outs 50 of the seismic cable. There is also provided an associated accelerometer for integration into the seismic streamer cable. The accelerometer is characteristic by a split-element sensor base 30, 35 for being efficiently arranged into the cut-outs 50 of the seismic cable. A method of producing a seismic streamer cable according to the invention incorporating a hydrophone or accelerometer according to the invention is also provided.Type: GrantFiled: June 10, 2009Date of Patent: May 26, 2015Assignee: Optoplan ASInventors: Arne Berg, Jon Thomas Kringlebotn
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Publication number: 20150085618Abstract: The invention relates to a hydrophone housing. The housing comprises an outer casing with an exterior shape being in close contact with sediment when buried therein and having a deflectable wall part. Solid material partly fills the casing to define an outer chamber behind the deflectable wall part, a cavity shaped so that an inner chamber is defined immediately surrounding a hydrophone sensing element held therein, and a first duct for liquid flow communication between the outer chamber and the cavity or an internal volume of the hydrophone sensing element. Thereby, a hydraulic coupling is provided so that an acoustic pressure causing small radial displacements of outer surface of the housing will, via liquid in the first duct, cause large radial displacements of the hydrophone sensitive element.Type: ApplicationFiled: May 24, 2013Publication date: March 26, 2015Inventors: Roar Furuhaug, Jon Thomas Kringlebotn
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Publication number: 20140033501Abstract: There is provided a solid seismic streamer cable for use in seismic surveying in marine environments. The streamer is characterised by a buffer layer 2 which is provided with a cut-out 50 and a sensor element arranged in the cut-out 50. There is also provided an associated hydrophone for integration into the seismic streamer cable. The hydrophone is characteristic in a split-element sensor base 10, 11 being suited for efficient mounting into the cut-outs 50 of the seismic cable. There is also provided an associated accelerometer for integration into the seismic streamer cable. The accelerometer is characteristic by a split-element sensor base 30, 35 for being efficiently arranged into the cut-outs 50 of the seismic cable. A method of producing a seismic streamer cable according to the invention incorporating a hydrophone or accelerometer according to the invention is also provided.Type: ApplicationFiled: October 4, 2013Publication date: February 6, 2014Applicant: Optoplan ASInventors: Arne Berg, Jon Thomas Kringlebotn
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Publication number: 20120069703Abstract: There is provided a solid seismic streamer cable for use in seismic surveying in marine environments. The streamer is characterised by a buffer layer 2 which is provided with a cut-out 50 and a sensor element arranged in the cut-out 50. There is also provided an associated hydrophone for integration into the seismic streamer cable. The hydrophone is characteristic in a split-element sensor base 10, 11 being suited for efficient mounting into the cut-outs 50 of the seismic cable. There is also provided an associated accelerometer for integration into the seismic streamer cable. The accelerometer is characteristic by a split-element sensor base 30, 35 for being efficiently arranged into the cut-outs 50 of the seismic cable. A method of producing a seismic streamer cable according to the invention incorporating a hydrophone or accelerometer according to the invention is also provided.Type: ApplicationFiled: November 22, 2011Publication date: March 22, 2012Applicant: OptoplanInventors: Arne Berg, Jon Thomas Kringlebotn
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Publication number: 20100313659Abstract: There is provided a solid seismic streamer cable for use in seismic surveying in marine environments. The streamer is characterised by a buffer layer 2 which is provided with a cut-out 50 and a sensor element arranged in the cut-out 50. There is also provided an associated hydrophone for integration into the seismic streamer cable. The hydrophone is characteristic in a split-element sensor base 10, 11 being suited for efficient mounting into the cut-outs 50 of the seismic cable. There is also provided an associated accelerometer for integration into the seismic streamer cable. The accelerometer is characteristic by a split-element sensor base 30, 35 for being efficiently arranged into the cut-outs 50 of the seismic cable. A method of producing a seismic streamer cable according to the invention incorporating a hydrophone or accelerometer according to the invention is also provided.Type: ApplicationFiled: June 10, 2009Publication date: December 16, 2010Inventors: ARNE BERG, JON THOMAS KRINGLEBOTN
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Patent number: 7679994Abstract: Seismic sensor systems and sensor station topologies, as well as corresponding cable and sensor station components, manufacturing and deployment techniques are provided. For some embodiments, networks of optical ocean bottom seismic (OBS) stations are provided, in which sensor stations are efficiently deployed in a modular fashion as series of array cable modules deployed along a multi-fiber cable.Type: GrantFiled: October 31, 2007Date of Patent: March 16, 2010Assignee: Optoplan ASInventors: Erlend Ronnekleiv, Ole Henrik Waagaard, Hilde Nakstad, Arne Berg, Jon Thomas Kringlebotn
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Patent number: 7551517Abstract: A seismic sensor station includes a housing containing a fiber optic hydrophone and a fiber optic accelerometer that can both be made from a single length of optical fiber arranged inside the housing. The fiber optic accelerometer is arranged in a liquid/oil filled compartment of the housing for dampening of mechanical resonances in the accelerometer due to mechanical disturbances and pressure fluctuations.Type: GrantFiled: May 5, 2006Date of Patent: June 23, 2009Assignee: Optoplan ASInventors: Arne Berg, Erlend Ronnekleiv, Ole Henrik Waagaard, Jon Thomas Kringlebotn, Hilde Nakstad, Roar Furuhaug
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Patent number: 7268884Abstract: Devices and methods of accurately determining optical wavelengths, such as the Bragg wavelengths of an FBG sensor array. Wavelength-swept light having a characteristic spectrum is swept over a bandwidth and is applied to an interference filter. The interference filter produces an optical spectrum having one or more reference peaks that are identifiable because of the characteristic spectrum. The optical spectrum is converted into electrical signals having at least one electrical signal that is identifiable because of the characteristic spectrum. The identifiable electrical signal is used by a signal processor as an absolute, high accuracy wavelength reference. Temperature compensation or temperature stabilization can compensate the characteristic wavelength. Fiber Bragg sensor systems can use the wavelength reference to determine the Bragg wavelength of FBG elements. The characteristic spectrum can be imparted by the light source or an optical element such as a transmission line filter.Type: GrantFiled: December 23, 2003Date of Patent: September 11, 2007Assignee: Optoplan ASInventors: Jon Thomas Kringlebotn, Hilde Nakstad, Dag Thingbo
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Patent number: 7171093Abstract: Methods for coating an optical fiber with optical fiber Bragg grating (FBG) with a hermetic coating, particularly a coating of carbon, are employed to avoid ingress of gases, vapors or fluids in the ambient environment. This ingress can be from water or hydrogen, which can diffuse in the fiber glass and cause deviation/drift in the measured Bragg measurements. Bragg gratings that maintain the grating strength at temperatures in excess of 1000° C. are used and can be formed by heating the fiber above 1000° C. in a chamber with a reactive gas that produces deposition of carbon.Type: GrantFiled: June 11, 2002Date of Patent: January 30, 2007Assignee: Optoplan, ASInventors: Jon Thomas Kringlebotn, Audun Hordvik
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Patent number: 7157693Abstract: An optical wavelength readout system for application in optical sensing systems is disclosed. The system includes a Master unit including a wavelength swept optical source for launching light into a string of optical sensors, and a detection and processing unit for detecting and processing the light emitted by the source. The system also includes a Slave unit including a light coupling device for coupling light from the light source into the string of sensors and for coupling light reflected from the string of sensors to a detection and processing unit arranged to detect and process the reflected light. The Master unit includes a wavelength reference unit adapted to make a reference signal available to other parts of the sensing system. The reference signal represents a generally exact relation between the wavelength of the light emitted from the source and time.Type: GrantFiled: February 6, 2006Date of Patent: January 2, 2007Assignee: Optoplan ASInventors: Dag Thingbo, Jon Thomas Kringlebotn, Hilde Nakstad, Erlend Ronnekleiv
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Patent number: 7072044Abstract: Fiber optic particle detector for measurements in a fluid flow, comprising an optical fiber (2,3,12) being acoustically coupled to a mechanical element (11,13,14) adapted to be acoustically coupled to the flow, a fiber optic interferometer (54,56) and a light source (12,51,55) providing light in said optical fiber.Type: GrantFiled: August 30, 2001Date of Patent: July 4, 2006Assignee: Optopian ASInventors: Jon Thomas Kringlebotn, Erlend Rønnekleiv, Sverre Knudsen
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Patent number: 7060967Abstract: An optical wavelength readout system for application in optical sensing systems is disclosed. The system includes a Master unit including a wavelength swept optical source for launching light into a string of optical sensors, and a detection and processing unit for detecting and processing the light emitted by the source. The system also includes a Slave unit including a light coupling device for coupling light from the light source into the string of sensors and for coupling light reflected from the string of sensors to a detection and processing unit arranged to detect and process the reflected light. The Master unit includes a wavelength reference unit adapted to make a reference signal available to other parts of the sensing system. The reference signal represents a generally exact relation between the wavelength of the light emitted from the source and time.Type: GrantFiled: October 12, 2004Date of Patent: June 13, 2006Assignee: Optoplan ASInventors: Dag Thingbo, Jon Thomas Kringlebotn, Hilde Nakstad, Erlend Ronnekleiv
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Patent number: 7003184Abstract: A body compatible fiber optic sensor probe for invasive medical use is provided. The probe includes at least one sensing location at which the fiber is configured to provide at least one detectable changeable optical property responsive to strain within the fiber, and at least one sensing element which undergoes a volumetric change in response to an in body parameter to be sensed. The sensing element is coupled to the fiber in such a way that the volumetric change induces strain within the fiber so as to vary the detectable optical property or properties.Type: GrantFiled: September 7, 2001Date of Patent: February 21, 2006Assignee: OptoMed. ASInventors: Erlend Ronnekleiv, Arne Berg, Jon Thomas Kringlebotn, Reinold Ellingsen, Dag Roar Hjeime
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Patent number: 6888125Abstract: A fiber optic sensor system comprises at least one measuring sensor 1 providing an optical output dependent upon one or more parameters to be measured, e.g. temperature, and at least one reference sensor 2 providing a reference output for comparison with the measuring sensor output. The reference sensor is provided in a birefringent fiber. The system includes a detecting means 13,14 whereby a reference beat signal f2 is derived by measuring the optical frequency splitting between frequency components in different polarization planes of the reference sensor output. A further beat signal f3 is generated between the measuring and reference sensor outputs, such beat signals being used to derive a measurement of one or more parameters.Type: GrantFiled: December 12, 2001Date of Patent: May 3, 2005Assignee: Optoplan ASInventors: Erlend Ronnekleiv, Dag Roar Hjelme, Jon Thomas Kringlebotn
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Publication number: 20040234221Abstract: Method for coating an optical fibre with optical fibre Bragg grating (FBG) with a hermetic coating, particularly a coating of carbon, to avoid ingress of gases, vapours or fluids in the ambient environment. This can be water or hydrogen, which can diffuse into the fibre glass and cause deviation/drift in the measured Bragg measurements. Bragg grating that maintain the grating strength at temperatures in excess of 1000° C. is used, which is heated to above 1000 ° C. in a chamber with a reactive gas that produces deposition of carbon.Type: ApplicationFiled: June 14, 2004Publication date: November 25, 2004Inventors: Jon Thomas Kringlebotn, Audun Hordvik
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Publication number: 20040197050Abstract: Optical device for distributed sensing of a measurand and/or changes thereof where the spectral transmission and reflection characteristics of the device depend upon the measurand. A passive sensing section have at least one Bragg grating sensing structure in a waveguide. The Bragg grating sensing structure comprises at least two superimposed or partly overlapping Bragg subgratings with at least two different Bragg wavelengths. At least two of the said Bragg subgratings comprise a phase-shift. The Bragg subgratings have their phase shifts spatially separated from each other along the waveguide sensing section. The sensing section can be made active by at least partly doping it with rare earth ions and forming a laser medium, or an active component. Examples of using the passive as well as the active sensing sections in optical distributed sensors are described.Type: ApplicationFiled: May 17, 2004Publication date: October 7, 2004Inventors: Sigurd Weidemann Lovseth, Jon Thomas Kringlebotn
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Patent number: 6788418Abstract: A method for measurements of the orthogonally polarized minimum and maximum Bragg wavelengths of one of several birefringent fiber Bragg grate FBG sensors, and alternatively a method for eliminating errors in FBG sensor measurements caused by undesired grating birefringence, using an FBG wavelength interrogation apparatus, where the light from a polarized wavelength swept narrowband source (1) is passed through an electrically controllable polarization controller (2), operated in either a scanning mode or a tracking mode to find the two orthogonally polarized reflection spectra of the birefringent FBGs (6) with corresponding minimum and maximum Bragg wavelength &ggr;nx and &ggr;nx, where a low-birefringent reference FBG with known wavelength (5) and a low-birefringent fixed Fabry-Perod interferometer (8), generating frequency equidistant peaks are used in combination to provide accurate and readable wavelength measurements.Type: GrantFiled: January 23, 2002Date of Patent: September 7, 2004Assignee: Optoplan ASInventor: Jon Thomas Kringlebotn
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Publication number: 20040033017Abstract: Fibre optic particle detector for measurements in a fluid flow, comprising an optical fibre being acoustically coupled to a mechanical element adapted to be acoustically coupled to the flow, a fibre optic interferometer and a light source providing light in said optical fibre.Type: ApplicationFiled: September 8, 2003Publication date: February 19, 2004Inventors: Jon Thomas Kringlebotn, Erlend Ronnekleiv, Sverre Knudsen