Piezoelectric motion sensor

Details Piezoelectric motion sensor Piezoelectric motion sensor

1993-01-04

1993-11-02

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

310330, 340539, 340566, 340665, 340666, G08B 1314

Patent

active

052587436

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.

REFERENCES:
patent: 3588858 (1971-06-01), Demuth
patent: 3760402 (1973-09-01), Magerle et al.
patent: 4737110 (1988-04-01), Masuda
patent: 5004999 (1991-04-01), Hartmann et al.

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