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US 10,378,983 B2Granted
Foam pressure sensor
AssigneeRogers Corporation
InventorsAniruddha Shere, Karl E. Sprentall
Life of this patent
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Abstract
A pressure sensor includes a first plate (102), a second plate (104) and a foam (106) disposed between the first and second plate. The foam is a polyurethane foam having an average cell size of about 50 to 250 urn and a density of between 5 to 30 lbs/ft3.
Claims9
A hybrid sensor comprising:
- a first plate;
- a second plate;
- a foam disposed between the first and second plate;
- wherein the first plate, the second plate and the foam are disposed relative to each other forming a foam capacitor:
- a conductor clad piezoelectric film is disposed on a surface of one of the first or second plates forming a piezoelectric sensor;
- wherein the piezoelectric sensor has a bandwidth, defined by an intrinsic RC time constant of the piezoelectric sensor, that is larger than a bandwidth of the foam capacitor, providing a hybrid sensor having a high bandwidth impact sensor via the piezoelectric sensor, and a lower bandwidth pressure sensor via the foam capacitor.
3 more elements
Dependencies are inferred from the claim text.