Security system
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United States of America Patent
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-
Nov 25, 1997
Grant Date -
N/A
app pub date -
Sep 22, 1995
filing date -
Sep 22, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A security system includes a pressure sensing circuit for generating an electrical signal in response to changes in pressure and a signal processing circuit, connected to receive the electrical signal, for determining whether the electrical signal represents an intrusion pattern. A pressure sensing circuit generates an electrical signal in response to changes in pressure and a trigger circuit for determining whether an intrusion has occurred by determining whether a peak of the electrical signal has an amplitude that exceeds a floating amplitude threshold, wherein the floating amplitude threshold compensates for ambient noise in the enclosed area. A monitor mode measures intrusion data in a specific enclosed area and determines security system thresholds in accordance with the measured intrusion data.
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