Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1990-07-19
1992-09-22
Ng, Jin F.
Communications: electrical
Condition responsive indicating system
Specific condition
342 27, 364564, 367 93, G08B 1318, G01S 1300
Patent
active
051500990
ABSTRACT:
A home security detection system, incorporating an antenna phasing system for transmitting signals and receiving return signals, and computer software driven circuitry identifies specific characteristics of both stationary and movable objects in a monitored area to obtain a template. The system activates an alarm or interacts with other external alarm systems when the absence or presence of certain object-characteristics are identified as abnormal as compared to the template.
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Dawes Daniel L.
Mullen Jr. Thomas J.
Ng Jin F.
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