Electrostatic pressure sensor with porous dielectric diaphragm
First Claim
1. A pressure sensor comprising:
- a first pressure chamber containing fill fluid at a first pressure;
a second pressure chamber containing fill fluid at a second pressure;
a porous dielectric diaphragm having a first major surface exposed to the first pressure chamber and a second major surface exposed to the second pressure chamber;
a first electrode positioned with respect to the first major surface; and
a second electrode positioned with respect to the second major surface.
1 Assignment
0 Petitions
Accused Products
Abstract
A pressure sensor comprises a first pressure chamber containing fill fluid at a first pressure, a second pressure chamber containing fill fluid at a second pressure, a porous dielectric diaphragm having first and second major surfaces exposed to the first and second pressure chambers, and first and second electrodes positioned with respect to the first and second major surfaces. A method for sensing pressure is also disclosed, comprising applying first and second pressures to fill fluid in first and second pressure chambers of a pressure sensor having a porous dielectric diaphragm, and producing an output representative of a pressure differential between the pressures, as a function of surface charges on first and second major surfaces of the porous dielectric diaphragm.
45 Citations
29 Claims
-
1. A pressure sensor comprising:
-
a first pressure chamber containing fill fluid at a first pressure; a second pressure chamber containing fill fluid at a second pressure; a porous dielectric diaphragm having a first major surface exposed to the first pressure chamber and a second major surface exposed to the second pressure chamber; a first electrode positioned with respect to the first major surface; and a second electrode positioned with respect to the second major surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A pressure sensor, comprising:
-
a first pressure chamber; a second pressure chamber; a porous dielectric diaphragm that divides the first pressure chamber, at a first major surface of the diaphragm, from the second pressure chamber, at a second major surface of the diaphragm; a first electrode that responds to a first surface charge on the first major surface of the diaphragm; a second electrode that responds to a second surface charge on the second major surface of the diaphragm; and a fill fluid that flows through the diaphragm in response to a pressure differential between the first pressure and the second pressure. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
-
-
24. A method for sensing pressure, the method comprising:
-
applying first and second pressures to fill fluid in first and second pressure chambers of a pressure sensor having a porous dielectric diaphragm; and producing an output representative of a pressure differential between the first and second pressures, as a function of surface charges on first and second major surfaces of the porous dielectric diaphragm. - View Dependent Claims (25, 26, 27, 28, 29)
-
Specification