Pressure sensor having a rotational response to the environment
AssigneeChevron U.S.A. Inc.
InventorDon M. Coates
Life of this patent
Estimating the term…
Abstract
Methods and systems of the invention are directed to a pressure sensor that includes a substrate, a first conductive plate, and a second conductive plate. The substrate is formed of a material having a low coefficient of thermal expansion (CTE). The first conductive plate is formed of a material having a CTE that is higher than the CTE of the substrate, and is attached to a first surface of the substrate. The second conductive plate is rotatably connected to the substrate through a hinge, and includes a portion that is adjacent to the first conductive plate.
Claims4
A method of measuring temperature in an enclosure using a system having a capacitive sensor with a first conductive plate and a second conductive plate rotatably attached to the first conductive plate, the method comprising:
- generating a signal having a predetermined frequency spectrum;
- modulating the frequency spectrum of the generated signal based on a relative rotation of the first and second conductive plates responsive to a temperature in the enclosure;
- and
- correlating the modulation to a temperature value.
Dependencies are inferred from the claim text.