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Ultrasonic Through-Wall Communication (UTWC) System

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
Apparatus for communicating information across a solid wall has one or two outside ultrasonic transducers coupled to an outside surface of the wall and connected to a carrier generator for sending an ultrasonic carrier signal into the wall and for receiving an output information signal from the wall. One or two inside ultrasonic transducers are coupled to an inside surface of the wall and one of them introduces the output information signal into the wall. When there are two inside transducers inside the wall, one receives the carrier signal and the second transmits the carrier after it is modulated by the output information from the sensor. When there is one inside transducer, the output information from the sensor is transmitted by changing the reflected or returned signal from the inside transducer. A power harvesting circuit inside the wall harvests power from the carrier signal and uses it to power the sensor.
Saulnier, Gary (East Greenbush, NY), Scarton, Henry (Troy, NY), Shoudy, David (Arlington, MA), Das, Pankaj (San Diego, CA), Gavens, Andrew (Niskayuna, NY)
12/ 443,878
October 1, 2007
STATEMENT OF GOVERNMENT INTEREST [0002] The Government has certain rights to this invention since it was created in part under a contract with the U.S. Department of Energy.