Method and system for locating objects

Details Method and system for locating objects Method and system for locating objects

2006-05-23

2006-05-23

Mullen, Jr., Thomas J. (Department: 2632)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S572100, C367S093000, C367S095000

Reexamination Certificate

active

07049960

ABSTRACT:
An area is established by positioning a string of boundary objects that are reflective to a range of ultrasonic frequencies. Tracking objects may be placed inside the area which also are reflective to the range of ultrasonic frequencies. An array of transducers insonify the area and the reflected signals are received by each transducer, digitized and stored as digital data. The digital data is read out in time reverse order and time reversal signals are generated that are coupled to each corresponding transducer. The time reversed signals focus energy on the reflective sources. The reflected signals resulting from the time reversed signals are analyzed to generate a reference signature indicating relative locations of boundary and tracking objects. The time reversed signals are sent intervals to generate new signatures which are compared to the reference signature to determine if tracking objects have been moved outside the area.

REFERENCES:
patent: 5535176 (1996-07-01), Yang
patent: 6161434 (2000-12-01), Fink et al.
patent: 6515588 (2003-02-01), Sarabia
patent: 6755083 (2004-06-01), Berryman
patent: 2003/0063000 (2003-04-01), Grimm
patent: 2003/0067397 (2003-04-01), Trimble
patent: WO02096148 (2002-11-01), None
Fink et al., Acoustic time-reversal mirrors, 2001, IOP Publishing Ltd.
Song et al., Demonstration of a High-Frequency Acoustic Barrier With a Time-Reversal Mirror, 2003, IEEE.
Fink et al., Self Focusing Inhomogeneous Media With “Time Reversal” Acoustic Mirrors, 1989, IEEE.
Ing et al., Surface and Sub-surface Flaws Detection Using Rayleigh Wave Time Reversal Mirros, 1995, IEEE.

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