Accession Number:

ADD013164

Title:

Near Ultrasonic Pattern Comparison Intrusion Detector.

Descriptive Note:

Patent, Filed 24 Jun 85, patented 27 Jan 87,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Report Date:

1987-01-27

Pagination or Media Count:

7.0

Abstract:

An intrusion detector is configured to transmit signals of a very short duration and then process the returned signals reflected from various surfaces and objects within the propagation path in a room to be secured. The return signals is a succession of peaks whose return times represent the location of respective objects. As configured, the intrusion detector apparatus includes, inter alia, a microprocessor that stores processed facsimiles of the return signals for an unoccupied room and continually makes comparisons with subsequent returned signals. When the returned signals changes, as a result of an unauthorized entry into the room, for example, a visual andor audible alarm indication is produced.

Subject Categories:

  • Miscellaneous Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE