Piezoelectric force/pressure sensor

Details Piezoelectric force/pressure sensor Piezoelectric force/pressure sensor

1984-02-24

1985-10-15

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to force

7386268, 73DIG4, 310338, G01L 116

Patent

active

045466580

ABSTRACT:
A piezoelectric force/pressure sensor capable of detecting the magnitude of static and dynamic force or pressure applied thereto, utilizes first and second transducers each having a piezoelectric member with opposed first and second surfaces; an electrode fabricated upon each of the first and second surfaces of each of the first and second piezoelectric members; and a member fabricated of a material of known resiliency having first and second opposed surfaces each attached to one of the electrode-bearing first and second surfaces of a different one of the piezoelectric transducers. A first of the piezoelectric transducers is excited to vibrate in the thickness mode. The vibrations are coupled through the interposed elastic middle layer and are transformed to provide an electrical output from the sensor which is responsive to the force/pressure applied along the axis of the transducer-resilient member-transducer sandwich.

REFERENCES:
patent: 1930905 (1933-10-01), Nicolson
patent: 2137852 (1938-11-01), Nicolson

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