Communications – electrical: acoustic wave systems and devices – Distance or direction finding
Reexamination Certificate
2007-11-06
2007-11-06
Lobo, Ian J. (Department: 3662)
Communications, electrical: acoustic wave systems and devices
Distance or direction finding
C367S124000, C367S127000, C367S906000, C073S649000
Reexamination Certificate
active
10925414
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.
REFERENCES:
patent: 2435231 (1948-02-01), McPherson
patent: 4970698 (1990-11-01), Dumestre, III.
patent: 5241518 (1993-08-01), McNelis et al.
patent: 5280457 (1994-01-01), Figueroa et al.
patent: 5346210 (1994-09-01), Utke et al.
patent: 5392258 (1995-02-01), Gabrielson et al.
patent: 5777948 (1998-07-01), Ferkinhoff et al.
patent: 5781505 (1998-07-01), Rowland
patent: 5878000 (1999-03-01), Dubois
patent: 5920522 (1999-07-01), Levanon et al.
patent: 5930202 (1999-07-01), Duckworth et al.
patent: 5973998 (1999-10-01), Showen et al.
patent: 6041654 (2000-03-01), Stake
patent: 6055523 (2000-04-01), Hillis
patent: 6178141 (2001-01-01), Duckworth et al.
patent: 6370084 (2002-04-01), Cray
patent: 6563763 (2003-05-01), McNelis
patent: 6847587 (2005-01-01), Patterson et al.
patent: 7054228 (2006-05-01), Hickling
patent: 7139222 (2006-11-01), Baxter et al.
patent: 2004/0100868 (2004-05-01), Patterson, Jr. et al.
patent: 2005/0194201 (2005-09-01), Tenghamn et al.
patent: 2006/0256660 (2006-11-01), Berger
patent: 2 015 127 (1979-09-01), None
patent: WO-02/082097 (2002-10-01), None
US 5,168,475, 12/1992, McNelis et al. (withdrawn)
Pierce, Allan D., “Nonlinear Effects In Sound Propagation”, Acoustics,McGraw-Hill Book Company, 1981, pp. 611-614.
Kalyanmoy DEB, Multi-Objective Optimization Using Evolutionary Algorithms,John Wiley&Sons, Ltd., (2001), pp. 85-101.
BBN Technologies Corp.
Lobo Ian J.
Ropes & Gray LLP
LandOfFree
Compact shooter localization system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compact shooter localization system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compact shooter localization system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3819084