Patents by Inventor Dustin Wade Carr
Dustin Wade Carr 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: 10184852Abstract: A sensor network having a series arrangement of fiber-coupled, reflective sensors is disclosed. In operation, a first light signal having multiple wavelength bands is launched in an upstream direction on a fiber bus. Each sensor includes a wavelength filter and an FP sensor that is sensitive to a parameter. Each wavelength filter (1) selectively passes a different one of the wavelength bands to its FP sensor and (2) reflects the remaining wavelength bands back into the fiber bus to continue upstream. The FP sensor imprints a signal based on the parameter onto its received light and reflects it as a second light signal. The collimator, wavelength filter, and FP sensor of each sensor are arranged such that each second light signal is returned to the fiber bus, which conveys them in a downstream direction to a processor that measures them and estimates the parameter at each sensor.Type: GrantFiled: June 26, 2017Date of Patent: January 22, 2019Assignee: LUNA INNOVATIONS INCORPORATEDInventor: Dustin Wade Carr
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Publication number: 20170356767Abstract: A sensor network having a series arrangement of fiber-coupled, reflective sensors is disclosed. In operation, a first light signal having multiple wavelength bands is launched in an upstream direction on a fiber bus. Each sensor includes a wavelength filter and an FP sensor that is sensitive to a parameter. Each wavelength filter (1) selectively passes a different one of the wavelength bands to its FP sensor and (2) reflects the remaining wavelength bands back into the fiber bus to continue upstream. The FP sensor imprints a signal based on the parameter onto its received light and reflects it as a second light signal. The collimator, wavelength filter, and FP sensor of each sensor are arranged such that each second light signal is returned to the fiber bus, which conveys them in a downstream direction to a processor that measures them and estimates the parameter at each sensor.Type: ApplicationFiled: June 26, 2017Publication date: December 14, 2017Inventor: Dustin Wade CARR
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Patent number: 9689714Abstract: A sensor network having a series arrangement of fiber-coupled, reflective sensors is disclosed. In operation, a first light signal having multiple wavelength bands is launched in an upstream direction on a fiber bus. Each sensor includes a wavelength filter and an FP sensor that is sensitive to a parameter. Each wavelength filter (1) selectively passes a different one of the wavelength bands to its FP sensor and (2) reflects the remaining wavelength bands back into the fiber bus to continue upstream. The FP sensor imprints a signal based on the parameter onto its received light and reflects it as a second light signal. The collimator, wavelength filter, and FP sensor of each sensor are arranged such that each second light signal is returned to the fiber bus, which conveys them in a downstream direction to a processor that measures them and estimates the parameter at each sensor.Type: GrantFiled: January 22, 2015Date of Patent: June 27, 2017Assignee: Micron Optics, Inc.Inventor: Dustin Wade Carr
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Publication number: 20150204748Abstract: A sensor network having a series arrangement of fiber-coupled, reflective sensors is disclosed. In operation, a first light signal having multiple wavelength bands is launched in an upstream direction on a fiber bus. Each sensor includes a wavelength filter and an FP sensor that is sensitive to a parameter. Each wavelength filter (1) selectively passes a different one of the wavelength bands to its FP sensor and (2) reflects the remaining wavelength bands back into the fiber bus to continue upstream. The FP sensor imprints a signal based on the parameter onto its received light and reflects it as a second light signal. The collimator, wavelength filter, and FP sensor of each sensor are arranged such that each second light signal is returned to the fiber bus, which conveys them in a downstream direction to a processor that measures them and estimates the parameter at each sensor.Type: ApplicationFiled: January 22, 2015Publication date: July 23, 2015Inventor: Dustin Wade Carr
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Publication number: 20150131693Abstract: A method for controlling the parallelism of first and second surfaces that define an optically resonant cavity is disclosed. The surfaces are separated by a first separation that is based on a support that holds the first surface relative to the second surface. The support comprises a first material and includes one or more regions in which the material stress of the first material is heat tuned to locally induce a stress gradient that results in a localized deformation. By controlling the locations and amounts of one or more localized deformation regions, the orientation of the first surface relative to the second surface is controlled.Type: ApplicationFiled: January 14, 2015Publication date: May 14, 2015Inventor: Dustin Wade Carr
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Patent number: 8730484Abstract: Embodiments of environmental stimulus sensors comprising multiple sources and detectors for interrogating one or more optically resonant cavities that are responsive to one or more environmental stimuli are disclosed. Such sensors have, among other advantages, improved immunity to source and/or detector noise.Type: GrantFiled: December 30, 2011Date of Patent: May 20, 2014Assignee: Symphony Acoustics, Inc.Inventors: Dustin Wade Carr, Gregory Robert Bogart
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Patent number: 8387456Abstract: A gravimeter for detecting a gravity difference between two points is disclosed. The gravimeter comprises an interferometric arrangement wherein the length of a reference arm is dependent upon the gravity local to a first accelerometer and the length of a sample arm is dependent upon the gravity local to a second accelerometer. A pair of photodetectors that operate in complimentary fashion provide electrical signals based on a first signal conveyed by the reference arm and a second signal conveyed by the sample arm. A change in the differential gravity between the two points induces equal and opposite changes to the magnitudes of the two electrical signals.Type: GrantFiled: March 17, 2009Date of Patent: March 5, 2013Assignee: Symphony Acoustics, Inc.Inventor: Dustin Wade Carr
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Publication number: 20120099114Abstract: Embodiments of environmental stimulus sensors comprising multiple sources and detectors for interrogating one or more optically resonant cavities that are responsive to one or more environmental stimuli are disclosed. Such sensors have, among other advantages, improved immunity to source and/or detector noise.Type: ApplicationFiled: December 30, 2011Publication date: April 26, 2012Applicant: SYMPHONY ACOUSTICS, INC.Inventors: Dustin Wade Carr, Gregory Robert Bogart
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Patent number: 8154734Abstract: Embodiments of environmental stimulus sensors comprising multiple sources and detectors for interrogating one or more optically resonant cavities that are responsive to one or more environmental stimuli are disclosed. Such sensors have, among other advantages, improved immunity to source and/or detector noise.Type: GrantFiled: April 23, 2009Date of Patent: April 10, 2012Assignee: Symphony Acoustics, Inc.Inventors: Dustin Wade Carr, Gregory Robert Bogart
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Patent number: 8026714Abstract: An accelerometer with improved immunity to sensitivity drift is disclosed. In some embodiments, the accelerometer comprises an actuator that induces a known acceleration on a reference frame. A signal based on this known acceleration is used to calibrate the accelerometer to mitigate the effects due to at least one of sensitivity drift, D.C. bias drift, sense laser wavelength drift, and resonant frequency drift.Type: GrantFiled: March 4, 2009Date of Patent: September 27, 2011Assignee: Symphony Acoustics, Inc.Inventor: Dustin Wade Carr
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Patent number: 8007609Abstract: A method for forming a structure comprising multiple parallel surfaces having a precise separation is disclosed. Precise separation and parallelism of the surfaces is achieved through the use of an adhesive mixture that comprises a plurality of spacers having a dimension substantially equal to the desired separation.Type: GrantFiled: October 31, 2007Date of Patent: August 30, 2011Assignee: Symphony Acoustics, Inc.Inventors: Dustin Wade Carr, Gregory Robert Bogart
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Publication number: 20110098950Abstract: Embodiments of infrasound sensors comprising multiple matched-responsivity pressure sensors are presented. Infrasound sensors in accordance with the present invention have limited volume, which enables them to observe wind velocity at the same point that infrasound is monitored. The small size and matched-responsivities enable infrasound sensors in accordance with the present invention to obviate the need for complex and costly spatial filters that degrade the signal-to-noise ratio of prior-art infrasound sensors.Type: ApplicationFiled: October 27, 2010Publication date: April 28, 2011Applicant: SYMPHONY ACOUSTICS, INC.Inventor: Dustin Wade Carr
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Patent number: 7894618Abstract: An apparatus and method for discriminating a directional component of a propagating pressure wave using an array of operatively-coupled displacement sensors are disclosed. In accordance with the illustrative embodiment, each displacement sensor in the array comprises two parallel layers, at least one of which is movable. The output signal of each displacement sensor is based on the separation of the layers. The displacement sensors are operatively-coupled through a compressible fluid such that the response of one of the sensors to an input can cause an output signal in at least one of the other sensors. The operative-coupling of the displacement sensors amplifies relative phase information between their respective output signals, which results in improved directionality. Some embodiments of the present invention are particularly well-suited for use in microphones.Type: GrantFiled: July 28, 2006Date of Patent: February 22, 2011Assignee: Symphony Acoustics, Inc.Inventor: Dustin Wade Carr
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Patent number: 7626707Abstract: An optical displacement sensor is disclosed comprising a beam splitter having two optically coupled and mechanically coupled optically resonant cavities. The respective cavity lengths of the optically resonant cavities are functions of an environmental stimulus. By virtue of the optically coupled optically resonant cavities, the output of the beam splitter is less sensitive to input wavelength variation yet retains high sensitivity to the environmental stimulus.Type: GrantFiled: October 29, 2007Date of Patent: December 1, 2009Assignee: Symphony Acoustics, Inc.Inventor: Dustin Wade Carr
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Publication number: 20090268211Abstract: Embodiments of environmental stimulus sensors comprising multiple sources and detectors for interrogating one or more optically resonant cavities that are responsive to one or more environmental stimuli are disclosed. Such sensors have, among other advantages, improved immunity to source and/or detector noise.Type: ApplicationFiled: April 23, 2009Publication date: October 29, 2009Applicant: SYMPHONY ACOUSTICS, INC.Inventors: Dustin Wade Carr, Gregory Robert Bogart
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Publication number: 20090235740Abstract: A gravimeter for detecting a gravity difference between two points is disclosed. The gravimeter comprises an interferometric arrangement wherein the length of a reference arm is dependent upon the gravity local to a first accelerometer and the length of a sample arm is dependent upon the gravity local to a second accelerometer. A pair of photodetectors that operate in complimentary fashion provide electrical signals based on a first signal conveyed by the reference arm and a second signal conveyed by the sample arm. A change in the differential gravity between the two points induces equal and opposite changes to the magnitudes of the two electrical signals.Type: ApplicationFiled: March 17, 2009Publication date: September 24, 2009Applicant: SYMPHONY ACOUSTICS, INC.Inventor: Dustin Wade Carr
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Publication number: 20090228235Abstract: An accelerometer with improved immunity to sensitivity drift is disclosed. In some embodiments, the accelerometer comprises an actuator that induces a known acceleration on a reference frame. A signal based on this known acceleration is used to calibrate the accelerometer to mitigate the effects due to at least one of sensitivity drift, D.C. bias drift, sense laser wavelength drift, and resonant frequency drift.Type: ApplicationFiled: March 4, 2009Publication date: September 10, 2009Applicant: SYMPHONY ACOUSTICS, INC.Inventor: Dustin Wade Carr
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Patent number: 7583390Abstract: An accelerometer based on an optical displacement sensor is disclosed. An embodiment of the present invention directs a light beam toward an optically resonant cavity and detects both the reflected and transmitted optical beams that result from interaction with the optically resonant cavity. The optically resonant cavity has a cavity length that is based on the position of a proof mass that moves in response to an acceleration.Type: GrantFiled: March 19, 2008Date of Patent: September 1, 2009Assignee: Symphony Acoustics, Inc.Inventor: Dustin Wade Carr
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Patent number: 7554674Abstract: An optical displacement sensor for sensing an environmental stimulus is disclosed. The optical displacement sensor exhibits an optical design that has suppressed back reflection and improved alignment tolerance between its optical components. The sensor is based on an optically resonant cavity whose cavity length is affected by the environmental stimulus. An embodiment of the present invention utilizes a lens to redirect a first light signal toward an optically resonant cavity such that the light is incident on the cavity at a non-normal angle of incidence.Type: GrantFiled: May 16, 2008Date of Patent: June 30, 2009Assignee: Symphony Acoustics, Inc.Inventor: Dustin Wade Carr
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Patent number: 7551295Abstract: An apparatus and method for detecting multiple beams from a beamsplitter is disclosed. Some embodiments of the present invention are particularly well-suited for use in microphones, high-sensitivity pressure sensors, vibration sensors, and accelerometer applications. Some embodiments of the present invention generate a differential electrical output signal that is based on multiple detected optical signals. The differential output signal is generated in response to an environmental stimulus, such as a pressure differential or incident acoustic energy. In accordance with the illustrative embodiment, an optical displacement sensor redirects the transmitted beam back through the optically-resonant cavity with an angular offset. Due to the angular offset, the redirected beam (i.e., retransmitted beam) transits the cavity with an intra-cavity path length that corresponds to substantially full transmittance of the retransmitted beam in the absence of the environmental stimulus.Type: GrantFiled: June 1, 2006Date of Patent: June 23, 2009Assignee: Symphony Acoustics, Inc.Inventors: Dustin Wade Carr, James Gilbert Helm