Patents by Inventor Murali V. Chaparala
Murali V. Chaparala 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: 12130141Abstract: A navigation system includes a star camera having a field of view. The star camera includes a sun shields that selectively block portions of the star camera's field of view, to prevent unwanted light, such as light from the sun or moon, reaching image sensors of the star cameras. Some sun shields include x-y stages or r-? stages to selectively position a light blocker to block the unwanted light. Some sun shields use positionable partially overlapping orthogonally polarized filters to block the unwanted light. Some sun shields use counter-wound spiral windows that are selectively rotated to block the unwanted light. Some sun shields a curved surface that defines a plurality of apertures fitted with individual mechanical or electronic shutters.Type: GrantFiled: October 16, 2020Date of Patent: October 29, 2024Inventors: Robin Mark Adrian Dawson, Juha-Pekka J. Laine, Benjamin F. Lane, Murali V. Chaparala, Charles F. Arant, Matthew T. Jamula
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Patent number: 11131549Abstract: A navigation system includes a monocentric lens and one or more curved image sensor arrays disposed parallel and spaced apart from the lens to capture respective portions, not all, of the field of view of the lens.Type: GrantFiled: November 19, 2014Date of Patent: September 28, 2021Assignee: The Charles Stark Draper Laboratory, Inc.Inventors: Robin Mark Adrian Dawson, Juha-Pekka J. Laine, Murali V. Chaparala, Charles Arant, Matthew T. Jamula
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Patent number: 11125562Abstract: A navigation system includes a monocentric lens and one or more curved image sensor arrays disposed parallel and spaced apart from the lens to capture respective portions, not all, of the field of view of the lens.Type: GrantFiled: March 15, 2017Date of Patent: September 21, 2021Assignee: The Charles Stark Draper Laboratory, Inc.Inventors: Robin Mark Adrian Dawson, Juha-Pekka J. Laine, Murali V. Chaparala, Charles Arant, Matthew T. Jamula
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Publication number: 20210108922Abstract: A navigation system includes a star camera having a field of view. The star camera includes a sun shields that selectively block portions of the star camera's field of view, to prevent unwanted light, such as light from the sun or moon, reaching image sensors of the star cameras. Some sun shields include x-y stages or r-? stages to selectively position a light blocker to block the unwanted light. Some sun shields use positionable partially overlapping orthogonally polarized filters to block the unwanted light. Some sun shields use counter-wound spiral windows that are selectively rotated to block the unwanted light. Some sun shields a curved surface that defines a plurality of apertures fitted with individual mechanical or electronic shutters.Type: ApplicationFiled: October 16, 2020Publication date: April 15, 2021Inventors: Robin Mark Adrian Dawson, Juha-Pekka J. Laine, Benjamin F. Lane, Murali V. Chaparala, Charles F. Arant, Matthew T. Jamula
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Publication number: 20190107846Abstract: A system for management and control of vehicles is disclosed. In one example, the system manages and controls air traffic of aerial vehicles such as unmanned aerial vehicles (UAVs). The vehicular system includes vehicles including sensors for gathering sensor data, and a distributed control system that controls and manages the vehicles using the sensor data.Type: ApplicationFiled: October 5, 2018Publication date: April 11, 2019Inventors: Nilay K. Roy, Michael A. Ridge, Scott E. Lennox, Rami Mangoubi, Murali V. Chaparala
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Publication number: 20190066845Abstract: A distributed analytics system for identification and determination of disease and/or injuries is implemented on mobile computing devices carried by the users and a distributed computer network communicating with the mobile computing devices.Type: ApplicationFiled: August 28, 2018Publication date: February 28, 2019Inventors: Nilay K. Roy, Michael A. Ridge, Scott E. Lennox, Rami Mangoubi, Murali V. Chaparala
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Patent number: 9927510Abstract: A star tracker determines a location or orientation of an object, such as a space vehicle, by observing unpolarized light from one or more stars or other relatively bright navigational marks, without imaging optics, pixelated imaging sensors or associated pixel readout electronics. An angle of incidence of the light is determined by comparing signals from two or more differently polarized optical sensors. The star tracker may be fabricated on a thin substrate. Some embodiments have vertical profiles of essentially just their optical sensors. Some embodiments include micro-baffles to limit field of view of the optical sensors.Type: GrantFiled: August 6, 2015Date of Patent: March 27, 2018Assignee: The Charles Stark Draper Laboratory, Inc.Inventors: Erik L. Waldron, Juha-Pekka J. Laine, Gregory P. Blasche, Murali V. Chaparala, Robin Mark Adrian Dawson, Benjamin F. Lane, Stephen P. Smith
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Patent number: 9891305Abstract: A chip scale star tracker that couples starlight into a lightguide such that the angle of incidence partially determines the mode of propagation of the starlight in the lightguide. A baffle system integrated with the lightguide prevents propagation of light incident from a predetermined range of angles.Type: GrantFiled: June 3, 2016Date of Patent: February 13, 2018Assignee: THE CHARLES STARK DRAPER LABORATORY, INC.Inventors: Juha-Pekka Laine, Gregory P. Blasche, Murali V. Chaparala, Robin Dawson, Benjamin Lane, Stephen P. Smith, Erik Waldron
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Publication number: 20170184401Abstract: A navigation system includes a monocentric lens and one or more curved image sensor arrays disposed parallel and spaced apart from the lens to capture respective portions, not all, of the field of view of the lens.Type: ApplicationFiled: March 15, 2017Publication date: June 29, 2017Inventors: Robin Mark Adrian Dawson, Juha-Pekka J. Laine, Murali V. Chaparala, Charles Arant, Matthew T. Jamula
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Patent number: 9482553Abstract: Methods and apparatus for calibrating a gyroscope without rotating the instrument. In one example, a calibration method includes operating the gyroscope in a self-oscillation loop to generate x-axis and y-axis drive signals, adding forcing signals to the x-axis and y-axis drive signals to produce pick-off x-axis and y-axis signals, measuring the pick-off x-axis and y-axis signals to produce measurement data, determining a relative phase between the pick-off x-axis and y-axis signals, based on the measurement data and the relative phase, estimating parameters of the gyroscope, based on the measurement data and the estimated parameters, calculating estimated position signals to calibrate the gyroscope.Type: GrantFiled: September 30, 2014Date of Patent: November 1, 2016Assignee: THE CHARLES STARK DRAPER LABORATORY, INC.Inventors: Marc S. Weinberg, Eugene H. Cook, Stephen L. Finberg, Murali V. Chaparala, Thayne R. Henry, Thomas A. Campbell
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Publication number: 20160282441Abstract: A chip scale star tracker that couples starlight into a lightguide such that the angle of incidence partially determines the mode of propagation of the starlight in the lightguide. A baffle system integrated with the lightguide prevents propagation of light incident from a predetermined range of angles.Type: ApplicationFiled: June 3, 2016Publication date: September 29, 2016Inventors: Juha-Pekka Laine, Gregory P. Blasche, Murali V. Chaparala, Robin Dawson, Benjamin Lane, Stephen P. Smith, Erik Waldron
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Patent number: 9372250Abstract: A chip scale star tracker that captures plane-wave starlight propagating in free space with a wafer-thin angle-sensitive broadband filter-aperture, and directs the light into a waveguide structure for readout. Angular information about the star source is determined from characteristics of the starlight propagating in the waveguide. Certain examples include internal propagation-constant-based baffling to elimination stray light from extreme angles.Type: GrantFiled: April 22, 2015Date of Patent: June 21, 2016Assignee: THE CHARLES STARK DRAPER LABORATORY, INC.Inventors: Juha-Pekka Laine, Gregory P. Blasche, Murali V. Chaparala, Robin Dawson, Benjamin Lane, Stephen P. Smith, Erik Waldron
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Publication number: 20160091339Abstract: Methods and apparatus for calibrating a gyroscope without rotating the instrument. In one example, a calibration method includes operating the gyroscope in a self-oscillation loop to generate x-axis and y-axis drive signals, adding forcing signals to the x-axis and y-axis drive signals to produce pick-off x-axis and y-axis signals, measuring the pick-off x-axis and y-axis signals to produce measurement data, determining a relative phase between the pick-off x-axis and y-axis signals, based on the measurement data and the relative phase, estimating parameters of the gyroscope, based on the measurement data and the estimated parameters, calculating estimated position signals to calibrate the gyroscope.Type: ApplicationFiled: September 30, 2014Publication date: March 31, 2016Inventors: Marc S. Weinberg, Eugene H. Cook, Stephen L. Finberg, Murali V. Chaparala, Thayne R. Henry, Thomas A. Campbell
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Publication number: 20160041265Abstract: A star tracker determines a location or orientation of an object, such as a space vehicle, by observing unpolarized light from one or more stars or other relatively bright navigational marks, without imaging optics, pixelated imaging sensors or associated pixel readout electronics. An angle of incidence of the light is determined by comparing signals from two or more differently polarized optical sensors. The star tracker may be fabricated on a thin substrate. Some embodiments have vertical profiles of essentially just their optical sensors. Some embodiments include micro-baffles to limit field of view of the optical sensors.Type: ApplicationFiled: August 6, 2015Publication date: February 11, 2016Inventors: Erik L. Waldron, Juha-Pekka J. Laine, Gregory P. Blasche, Murali V. Chaparala, Robin Mark Adrian Dawson, Benjamin F. Lane, Stephen P. Smith
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Publication number: 20150226830Abstract: A chip scale star tracker that captures plane-wave starlight propagating in free space with a wafer-thin angle-sensitive broadband filter-aperture, and directs the light into a waveguide structure for readout. Angular information about the star source is determined from characteristics of the starlight propagating in the waveguide. Certain examples include internal propagation-constant-based baffling to elimination stray light from extreme angles.Type: ApplicationFiled: April 22, 2015Publication date: August 13, 2015Inventors: Juha-Pekka Laine, Gregory P. Blasche, Murali V. Chaparala, Robin Dawson, Benjamin Lane, Stephen P. Smith, Erik Waldron
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Publication number: 20150124103Abstract: A navigation system includes a monocentric lens and one or more curved image sensor arrays disposed parallel and spaced apart from the lens to capture respective portions, not all, of the field of view of the lens.Type: ApplicationFiled: November 19, 2014Publication date: May 7, 2015Inventors: Robin Mark Adrian Dawson, Juha-Pekka J. Laine, Murali V. Chaparala, Charles Arant, Matthew T. Jamula
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Patent number: 9019509Abstract: A chip scale star tracker that captures plane-wave starlight propagating in free space with a wafer-thin angle-sensitive broadband filter-aperture, and directs the light into a waveguide structure for readout. Angular information about the star source is determined from characteristics of the starlight propagating in the waveguide. Certain examples include internal propagation-constant-based baffling to elimination stray light from extreme angles.Type: GrantFiled: June 28, 2013Date of Patent: April 28, 2015Assignee: The Charles Stark Draper Laboratory, Inc.Inventors: Juha-Pekka Laine, Gregory P. Blasche, Murali V. Chaparala, Robin Dawson, Benjamin Lane, Stephen P. Smith, Erik Waldron
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Publication number: 20150002854Abstract: A chip scale star tracker that captures plane-wave starlight propagating in free space with a wafer-thin angle-sensitive broadband filter-aperture, and directs the light into a waveguide structure for readout. Angular information about the star source is determined from characteristics of the starlight propagating in the waveguide. Certain examples include internal propagation-constant-based baffling to elimination stray light from extreme angles.Type: ApplicationFiled: June 28, 2013Publication date: January 1, 2015Inventors: Juha-Pekka Laine, Gregory P. Blasche, Murali V. Chaparala, Robin Dawson, Benjamin Lane, Stephen P. Smith, Erik Waldron
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Patent number: 6237399Abstract: A cantilever structure is provided having a cantilever arm with a piezo-active detector embedded on the surface at the fixed end of the cantilever as well as at a sensing point close to the free end along with an integrated amplification circuitry. Deflection of the cantilever arm is initiated by two different methods: (a) by a force at the free end which induces a surface strain at the base of the cantilever and no strain at the free end and (b) by a torque at the free end which induces a maximum strain at the free end but no strain at the base of the cantilever. In the first case a piezo-active signal is produced only in the detector at the base and in the second case only in the detector close to the free end.Type: GrantFiled: January 15, 1999Date of Patent: May 29, 2001Inventors: Bellave S. Shivaram, Murali V. Chaparala, Stephen H. Jones