Patents by Inventor Christopher G. Larsen
Christopher G. Larsen 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: 11982648Abstract: An environmental condition may be measured with a sensor (10) including a wire (20) having an ultrasonic signal transmission characteristic that varies in response to the environmental condition by sensing ultrasonic energy propagated through the wire using multiple types of propagation, and separating an effect of temperature on the wire from an effect of strain on the wire using the sensed ultrasonic energy propagated through the wire using the multiple types of propagation. A positive feedback loop may be used to excite the wire such that strain in the wire is based upon a sensed resonant frequency, while a square wave with a controlled duty cycle may be used to excite the wire at multiple excitation frequencies. A phase matched cone (200, 210) may be used to couple ultrasonic energy between a waveguide wire (202, 212) and a transducer (204, 214).Type: GrantFiled: November 30, 2020Date of Patent: May 14, 2024Assignee: Etegent Technologies, Ltd.Inventors: Oleg Lobkis, Richard A. Roth, Christopher G. Larsen, Stuart J. Shelley
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Publication number: 20210372971Abstract: An environmental condition may be measured with a sensor (10) including a wire (20) having an ultrasonic signal transmission characteristic that varies in response to the environmental condition by sensing ultrasonic energy propagated through the wire using multiple types of propagation, and separating an effect of temperature on the wire from an effect of strain on the wire using the sensed ultrasonic energy propagated through the wire using the multiple types of propagation. A positive feedback loop may be used to excite the wire such that strain in the wire is based upon a sensed resonant frequency, while a square wave with a controlled duty cycle may be used to excite the wire at multiple excitation frequencies. A phase matched cone (200, 210) may be used to couple ultrasonic energy between a waveguide wire (202, 212) and a transducer (204, 214).Type: ApplicationFiled: November 30, 2020Publication date: December 2, 2021Inventors: Oleg Lobkis, Richard A. Roth, Christopher G. Larsen, Stuart J. Shelley
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Patent number: 10852277Abstract: An environmental condition may be measured with a sensor (10) including a wire (20) having an ultrasonic signal transmission characteristic that varies in response to the environmental condition by sensing ultrasonic energy propagated through the wire using multiple types of propagation, and separating an effect of temperature on the wire from an effect of strain on the wire using the sensed ultrasonic energy propagated through the wire using the multiple types of propagation. A positive feedback loop may be used to excite the wire such that strain in the wire is based upon a sensed resonant frequency, while a square wave with a controlled duty cycle may be used to excite the wire at multiple excitation frequencies. A phase matched cone (200, 210) may be used to couple ultrasonic energy between a waveguide wire (202, 212) and a transducer (204, 214).Type: GrantFiled: April 9, 2015Date of Patent: December 1, 2020Assignee: ETEGENT TECHNOLOGIES, LTD.Inventors: Oleg Lobkis, Richard A. Roth, Christopher G. Larsen, Stuart J. Shelley
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Patent number: 10854941Abstract: A broadband waveguide comprising at least one filament configured to transmit a signal therethrough. The broadband waveguide may include one or more reflection suppression techniques including a damping material coupled to at least a portion of the at least one filament and/or at least one reflection point configured thereon. The waveguide may further including a cladding material coupled to the at least one filament. The at least one filament may be coupled to a securing element configured to couple to a surface. The at least one filament may be coupled to a sensor configured to sense the transmitted signal.Type: GrantFiled: December 31, 2018Date of Patent: December 1, 2020Assignee: ETEGENT TECHNOLOGIES, LTD.Inventors: Christopher G. Larsen, Oleg Lobkis, Richard A. Roth, Stuart J. Shelley, Conor Coyan, Jason Feldman, Ann El Demery, Mackenzie Shelley
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Patent number: 10352778Abstract: A composite active waveguide temperature sensor (10) incorporates a first, sensor portion (16) formed of an environment-resistant material such as ceramic coupled through an ultrasonically-transparent bond (20) to a second, waveguide portion (18) formed of an ultrasonically-transmissive material such as a metallic filament wire. By doing so, the sensor portion (16) may be positioned within a harsh environment and subjected to a temperature to be measured, and the waveguide portion (18) may be used to propagate ultrasonic energy to and/or from the sensor portion (16) to a location distal from the harsh environment for measurement of the temperature. The ultrasonically-transparent bond (20) between these portions (16, 18) limits attenuation of and the introduction of reflections and other noise to an ultrasonic signal propagated across the bond (20).Type: GrantFiled: October 31, 2014Date of Patent: July 16, 2019Assignee: ETEGENT TECHNOLOGIES, LTD.Inventors: Christopher G. Larsen, Oleg Lobkis, Richard A. Roth, Stuart J. Shelley
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Publication number: 20190157733Abstract: A broadband waveguide comprising at least one filament configured to transmit a signal therethrough. The broadband waveguide may include one or more reflection suppression techniques including a damping material coupled to at least a portion of the at least one filament and/or at least one reflection point configured thereon. The waveguide may further including a cladding material coupled to the at least one filament. The at least one filament may be coupled to a securing element configured to couple to a surface. The at least one filament may be coupled to a sensor configured to sense the transmitted signal.Type: ApplicationFiled: December 31, 2018Publication date: May 23, 2019Inventors: Christopher G. Larsen, Oleg Lobkis, Richard A. Roth, Stuart J. Shelley, Conor Coyan, Jason Feldman, Ann El Demery, Mackenzie Shelley
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Publication number: 20170030871Abstract: An environmental condition may be measured with a sensor (10) including a wire (20) having an ultrasonic signal transmission characteristic that varies in response to the environmental condition by sensing ultrasonic energy propagated through the wire using multiple types of propagation, and separating an effect of temperature on the wire from an effect of strain on the wire using the sensed ultrasonic energy propagated through the wire using the multiple types of propagation. A positive feedback loop may be used to excite the wire such that strain in the wire is based upon a sensed resonant frequency, while a square wave with a controlled duty cycle may be used to excite the wire at multiple excitation frequencies. A phase matched cone (200, 210) may be used to couple ultrasonic energy between a waveguide wire (202, 212) and a transducer (204, 214).Type: ApplicationFiled: April 9, 2015Publication date: February 2, 2017Inventors: Oleg Lobkis, Richard A. Roth, Christopher G. Larsen, Stuart J. Shelley
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Publication number: 20160294033Abstract: A broadband waveguide comprising at least one filament configured to transmit a signal therethrough. The broad-band waveguide may include one or more reflection suppression techniques including a damping material coupled to at least a portion of the at least one filament and/or at least one reflection point configured thereon. The waveguide may further including a cladding material coupled to the at least one filament. The at least one filament may be coupled to a securing element configured to couple to a surface. The at least one filament may be coupled to a sensor configured to sense the transmitted signal.Type: ApplicationFiled: October 31, 2014Publication date: October 6, 2016Inventors: Christopher G. Larsen, Oleg Lobkis, Richard A. Roth, Stuart J. Shelley, Conor Coyan, Jason Feldman, Ann El Demery, Mackenzie Shelley
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Publication number: 20160273973Abstract: A composite active waveguide temperature sensor (10) incorporates a first, sensor portion (16) formed of an environment-resistant material such as ceramic coupled through an ultrasonically-transparent bond (20) to a second, waveguide portion (18) formed of an ultrasonically-transmissive material such as a metallic filament wire. By doing so, the sensor portion (16) may be positioned within a harsh environment and subjected to a temperature to be measured, and the waveguide portion (18) may be used to propagate ultrasonic energy to and/or from the sensor portion (16) to a location distal from the harsh environment for measurement of the temperature. The ultrasonically-transparent bond (20) between these portions (16, 18) limits attenuation of and the introduction of reflections and other noise to an ultrasonic signal propagated across the bond (20).Type: ApplicationFiled: October 31, 2014Publication date: September 22, 2016Inventors: Christopher G. Larsen, Oleg Lobkis, Richard A. Roth, Stuart J. Shelley