Piezoelectric apparatus for measuring bodily fluid pressure with

Details Piezoelectric apparatus for measuring bodily fluid pressure with Piezoelectric apparatus for measuring bodily fluid pressure with

1985-05-30

1986-07-15

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

73702, 73704, 73715, 73754, 310321, 310323, 310800, 128675, 128691, H01L 4108

Patent

active

046008551

ABSTRACT:
An apparatus for measuring pressure within a conduit is disclosed preferably comprising a tube whose resonant frequency varies with the pressure of fluid within the tube; means for passing the fluid to be measured through the tube; two active piezoelectric films disposed in intimate contact with the tube on opposite sides thereof; first electronic means for energizing the first of the films to cause the tube to resonate at its natural frequency, and second electronic means connected to the other of the films to monitor the frequency of the tube.

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