Piezoelectric motion sensor
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United States of America Patent
Stats
-
Nov 2, 1993
Issued Date -
N/A
app pub date -
Jan 4, 1993
filing date -
Jul 29, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A piezoelectric resilient arm contacts a projected object and establishes a reference relative to sensitivity means and differential detector means including feedback coupled amplifier means which operates in cooperation with a balanced square wave generator means for producing a switched output upon detecting motion. An alarm signal is produced which has a duration related to the rate of change of movement of the piezoelectric resilient arm. Programmable delay means appropriately enables an annunciator and/or wireless communication link to a system controller.
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