Patents by Inventor James E. Barger

James E. Barger 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).

  • Patent number: 8437223
    Abstract: The systems and methods described herein relate to an airborne shooter detection system having a plurality of sensors coupled to the body of an aircraft such as a helicopter. The system includes at least five sensors configured and arranged to disambiguate the location of a shooter. By measuring the arrival times of the shockwaves of projectiles at each of the sensors and determining the differences in the arrival times among sensors, the systems and methods may determine the location of one or more sources of the projectiles. A distance of at least ten meters separates two or more of the sensors. Such a separation is advantageous because it allows the system to disambiguate multiple shooters by resolving the curvature of the shockwave.
    Type: Grant
    Filed: July 28, 2008
    Date of Patent: May 7, 2013
    Assignee: Raytheon BBN Technologies Corp.
    Inventors: James E. Barger, Scott E. Ritter
  • Patent number: 8149649
    Abstract: Disclosed are systems and methods that can be used to detect shooters. The systems and methods described herein use arrival times of a shockwave, produced by a shot, at a plurality of sensors to assign weights to each of the plurality of sensors, and determine a shot trajectory based on the assigned weights.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: April 3, 2012
    Assignee: Raytheon BBN Technologies Corp.
    Inventors: Marshall Seth Brinn, James E. Barger, Stephen D. Milligan
  • Patent number: 8005631
    Abstract: Systems and methods for locating the shooter of supersonic projectiles are described. The system uses at least five, preferably seven, spaced acoustic sensors. Sensor signals are detected for shockwaves and muzzle blast, wherein muzzle blast detection can be either incomplete coming from less than 4 sensor channels, or inconclusive due to lack of signal strength. Shooter range can be determined by an iterative computation and/or a genetic algorithm by minimizing a cost function that includes timing information from both shockwave and muzzle signal channels. Disambiguation is significantly improved over shockwave-only measurements.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: August 23, 2011
    Assignee: Raytheon BBN Technologies Corp.
    Inventors: James E. Barger, Stephen D. Milligan, Marshall Seth Brinn, Richard J. Mullen
  • Patent number: 7787331
    Abstract: A sensor assembly suitable for use in an airborne shooter localization system. The sensor assembly has a pressure sensor subassembly with a pressure transducer positioned to detect pressure variations associated with a shock wave from a passing projectile or the muzzle blast following the shock wave. To substantially increase the signal to noise ratio for measurements of the shock wave, the pressure sensor subassembly attenuates pressure fluctuations triggered by turbulent airflow over the surface of the subassembly more than it attenuates the shock wave. This preferential attenuation is provided by separating the pressure transducer from the surface of the sensor assembly by a cavity large enough that the pressure fluctuations are substantially attenuated as they propagate across the cavity. Additionally, features of a housing that holds the pressure sensor subassembly facilitate use on an aircraft.
    Type: Grant
    Filed: May 13, 2008
    Date of Patent: August 31, 2010
    Assignee: BBN Technologies, Corp.
    Inventors: James E. Barger, John Stanley
  • Patent number: 7710828
    Abstract: Systems and methods for locating the shooter of supersonic projectiles are described. The system uses at least five, preferably seven, spaced acoustic sensors. Sensor signals are detected for shockwaves and muzzle blast, wherein muzzle blast detection can be either incomplete coming from less than 4 sensor channels, or inconclusive due to lack of signal strength. Shooter range can be determined by an iterative computation and/or a genetic algorithm by minimizing a cost function that includes timing information from both shockwave and muzzle signal channels. Disambiguation is significantly improved over shockwave-only measurements.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: May 4, 2010
    Assignee: BBN Technologies Corp
    Inventors: James E. Barger, Stephen D. Milligan, Marshall Seth Brinn, Richard J. Mullen
  • Publication number: 20100020643
    Abstract: The systems and methods described herein relate to an airborne shooter detection system having a plurality of sensors coupled to the body of an aircraft such as a helicopter. The system includes at least five sensors configured and arranged to disambiguate the location of a shooter. By measuring the arrival times of the shockwaves of projectiles at each of the sensors and determining the differences in the arrival times among sensors, the systems and methods may determine the location of one or more sources of the projectiles. A distance of at least ten meters separates two or more of the sensors. Such a separation is advantageous because it allows the system to disambiguate multiple shooters by resolving the curvature of the shockwave.
    Type: Application
    Filed: July 28, 2008
    Publication date: January 28, 2010
    Applicant: BBN Technologies Corp.
    Inventors: James E. Barger, Scott E. Ritter
  • Publication number: 20090285055
    Abstract: A sensor assembly suitable for use in an airborne shooter localization system. The sensor assembly has a pressure sensor subassembly with a pressure transducer positioned to detect pressure variations associated with a shock wave from a passing projectile or the muzzle blast following the shock wave. To substantially increase the signal to noise ratio for measurements of the shock wave, the pressure sensor subassembly attenuates pressure fluctuations triggered by turbulent airflow over the surface of the subassembly more than it attenuates the shock wave. This preferential attenuation is provided by separating the pressure transducer from the surface of the sensor assembly by a cavity large enough that the pressure fluctuations are substantially attenuated as they propagate across the cavity. Additionally, features of a housing that holds the pressure sensor subassembly facilitate use on an aircraft.
    Type: Application
    Filed: May 13, 2008
    Publication date: November 19, 2009
    Applicant: BBN Technologies
    Inventors: James E. Barger, John Stanley
  • Patent number: 7421936
    Abstract: The invention in various embodiments is directed to systems and methods for mitigating damage from a shock wave using a gas having a specific impedance less than air.
    Type: Grant
    Filed: April 22, 2005
    Date of Patent: September 9, 2008
    Assignee: BBN Technologies Corp.
    Inventors: James E. Barger, Daniel L. Hamel
  • Publication number: 20080190276
    Abstract: The invention in various embodiments is directed to systems and methods for mitigating damage from a shock wave using a gas having a specific impedance less than air.
    Type: Application
    Filed: April 22, 2005
    Publication date: August 14, 2008
    Inventors: James E. Barger, Daniel L. Hamel
  • Patent number: 7408840
    Abstract: Systems and methods for determining and disambiguating the location of the shooter of supersonic projectiles based on shockwave-only signals are described. Using several spaced sensors, an initial portion of the shockwave-only signals is sensed to determine Time-Differences-Of-Arrival (TDOA) for the sensor pairs. The resulting TDOAs are used to determine the gradient of curvature of the shockwave wavefront on the sensors. The gradient of curvature is then used to determine the disambiguated projectile trajectory.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: August 5, 2008
    Assignee: BBN Technologies Corp.
    Inventors: James E. Barger, Stephen D. Milligan, Marshall Seth Brinn, Richard J. Mullen
  • Publication number: 20080162089
    Abstract: Systems and methods for locating the shooter of supersonic projectiles are described. The system uses at least five, preferably seven, spaced acoustic sensors. Sensor signals are detected for shockwaves and muzzle blast, wherein muzzle blast detection can be either incomplete coming from less than 4 sensor channels, or inconclusive due to lack of signal strength. Shooter range can be determined by an iterative computation and/or a genetic algorithm by minimizing a cost function that includes timing information from both shockwave and muzzle signal channels. Disambiguation is significantly improved over shockwave-only measurements.
    Type: Application
    Filed: March 7, 2008
    Publication date: July 3, 2008
    Applicant: BBN Technologies Corp
    Inventors: James E. Barger, Stephen D. Milligan, Marshall Seth Brinn, Richard J. Mullen
  • Publication number: 20080159078
    Abstract: Systems and methods for locating the shooter of supersonic projectiles are described. The system uses at least five, preferably seven, spaced acoustic sensors. Sensor signals are detected for shockwaves and muzzle blast, wherein muzzle blast detection can be either incomplete coming from less than 4 sensor channels, or inconclusive due to lack of signal strength. Shooter range can be determined by an iterative computation and/or a genetic algorithm by minimizing a cost function that includes timing information from both shockwave and muzzle signal channels. Disambiguation is significantly improved over shockwave-only measurements.
    Type: Application
    Filed: March 7, 2008
    Publication date: July 3, 2008
    Applicant: BBN Technologies Corp
    Inventors: James E. Barger, Stephen D. Milligan, Marshall Seth Brinn, Richard J. Mullen
  • Patent number: 7372772
    Abstract: Systems and methods for compensation of sensor degradation in multi-shooter detection systems are described. In such systems, shooter position and trajectory can be estimated precisely from the shockwaves produced at the plurality of sensors by the incoming shots. However, sensor positions can shift and the performance of some sensors may degrade for various reasons. To compensate for sensor degradation that may occur over the life of a long-deployed system, the shooter estimation algorithms are dynamically adapted by performing a least-squares regression analysis of the shockwave arrival times to obtain a time residual for each shot, observing multiple shots, and weighting the individual contributions of the sensors as a function of the time residuals for the multiple shots.
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: May 13, 2008
    Assignee: BBN Technologies Corp.
    Inventors: Marshall Seth Brinn, James E. Barger, Stephen D. Milligan
  • Patent number: 7359285
    Abstract: Systems and methods for locating the shooter of supersonic projectiles are described. The system uses at least five, preferably seven, spaced acoustic sensors. Sensor signals are detected for shockwaves and muzzle blast, wherein muzzle blast detection can be either incomplete coming from less than 4 sensor channels, or inconclusive due to lack of signal strength. Shooter range can be determined by an iterative computation and/or a genetic algorithm by minimizing a cost function that includes timing information from both shockwave and muzzle signal channels. Disambiguation is significantly improved over shockwave-only measurements.
    Type: Grant
    Filed: August 23, 2005
    Date of Patent: April 15, 2008
    Assignee: BBN Technologies Corp.
    Inventors: James E. Barger, Stephen D. Milligan, Marshall Seth Brinn, Richard J. Mullen
  • Patent number: 7292502
    Abstract: The invention provides, in various embodiments, a transducer for generating hyper-directional sound beams, and a system and method employing a hyper-directional sound transducer for producing pressure gradients and forces across stationary and moving objects.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: November 6, 2007
    Assignee: BBN Technologies Corp.
    Inventor: James E. Barger
  • Patent number: 7292501
    Abstract: Systems and methods for locating the shooter of supersonic projectiles are described. Muzzle blast signals are neither sought nor required. The system uses at least two sensors, with each sensor having a 3-axis accelerometer. The sensors are spaced apart at least 1 meter and have each a diameter of about one centimeter. The three accelerometer signals of each sensor represent pressure gradients and are processed to find the shockwave arrival angle unit vector, the shockwave arrival time instant and peak pressure. Noise signals seldom cause false detections with this sensing method because the sensors have maximum sensitivity at the high frequency characteristics of shockwaves, while their sensitivity to the low frequency characteristics of ambient noise is relatively low.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: November 6, 2007
    Assignee: BBN Technologies Corp.
    Inventor: James E. Barger
  • Patent number: 7284431
    Abstract: An improved system for sensing ground motion is provided. The system generally comprises a shell and a case within the shell and connected by a suspension. The mass of the case is greater than the mass of the shell. An electrode within the shell detects relative motion between the shell and the case.
    Type: Grant
    Filed: November 14, 2003
    Date of Patent: October 23, 2007
    Assignee: BBN Technologies Corp.
    Inventor: James E. Barger
  • Patent number: 6178141
    Abstract: A low cost and highly accurate sniper detection and localization system uses observations of the shock wave from supersonic bullets to estimate the bullet trajectory, Mach number, and caliber. If available, muzzle blast observations from an unsilenced firearm is used to estimate the exact sniper location along the trajectory. The system may be fixed or portable and may be wearable on a user's body. The system utilizes a distributed array of acoustic sensors to detect the projectile's shock wave and the muzzle blast from a firearm. The detection of the shock wave and muzzle blast is used to measure the wave arrival times of each waveform type at the sensors. This time of arrival (TOA) information for the shock wave and blast wave are used to determine the projectile's trajectory and a line of bearing to the origin of the projectile. A very accurate model of the bullet ballistics and acoustic radiation is used which includes bullet deceleration.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: January 23, 2001
    Assignee: GTE Internetworking Incorporated
    Inventors: Gregory L. Duckworth, James E. Barger, Douglas C. Gilbert
  • Patent number: 6049758
    Abstract: A method for reducing the time, cost and apparatus required for monitoring the geometry of the oil/water, oil/gas, or gas/water interface in an underground reservoir. By strategically placing sources and sensors, and by fixing the sensors to the solid earth surface beneath the water, and by knowing the velocity fields in the overburden, the changing edges and geometry of the oil may be determined with significantly reduced data gathering. The strategic positions of the sources and receivers is determined by referencing to the known geometry from past surveys. In addition the velocity of the overburden is known by these prior surveys. In addition, higher resolution of reflectivity areas is achieved by use of sound sources capable of generating higher frequencies compensated for the earth's attenuation and by utilizing long integration times to improve signal to noise ratio. These sound sources can be smaller than prior art sources since they provide directed beams of narrower widths.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: April 11, 2000
    Assignee: BBN Corporation
    Inventors: Carey D. Bunks, James E. Barger
  • Patent number: 5930202
    Abstract: A low cost and highly accurate sniper detection and localization system uses observations of the shock wave from supersonic bullets to estimate the bullet trajectory, Mach number, and caliber. If available, muzzle blast observations from an unsilenced firearm is used to estimate the exact sniper location along the trajectory. The system utilizes a distributed array of acoustic sensors to detect the leading edge of a projectile's shock wave and the muzzle blast from a firearm. The detection of the shock wave and muzzle blast is used to measure the wave arrival times of each waveform type at the sensors. This time of arrival (TOA) information for the shock wave and blast wave are used to determine the projectile's trajectory and a line of bearing to the origin of the projectile. A very accurate model of the bullet ballistics and acoustic radiation is used which includes bullet deceleration.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: July 27, 1999
    Assignee: GTE Internetworking Incorporated
    Inventors: Gregory L. Duckworth, James E. Barger, Douglas C. Gilbert