Personal security system with weighted receiver locations
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United States of America Patent
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-
Apr 27, 1999
Grant Date -
N/A
app pub date -
Dec 11, 1996
filing date -
Dec 11, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A personal security system uses conversion factors that exaggerate the influence of signal strength to locate transmitting communicators. The system includes an alarm center, portable communicators for transmitting wireless signals and a plurality of fixed receivers in known positions for monitoring the transmissions and detecting the signals. Transmitted information, including signal strength, is forwarded from the receivers to the alarm center. A transmitting communicator is located by the system using the known positions and received signal strength at the detecting receivers. Conversion factors that increase with signal strength magnify its influence, so strong signals dominate the locating calculations. In addition to a calculated location of the transmitting communicator, the alarm center displays the location of a plurality of the detecting receivers, selecting between alternative displayed information depending on a comparison of the received signal strengths.
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Family
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