US 8,798,941 B2 · Differential pressure sensor and method

Abstract

A differential pressure sensor (105) for determining a differential pressure value is provided. The differential pressure sensor (105) includes a selector valve (110) configured to receive a first pressure at a first location and a second pressure at a second location that is spaced-apart from the first location, a single-sided pressure sensor (120) coupled to the selector valve (110) and receiving either the first pressure or the second pressure, and a processing system (130) coupled to the single-sided pressure sensor (120) and configured to receive one or more first single-sided pressure measurements from the single-sided pressure sensor (120), subsequently receive one or more second single-sided pressure measurements from the single-sided pressure sensor (120), and generate the differential pressure value from the one or more first single-sided pressure measurements and the one or more second single-sided pressure measurements.

Claims33

Dependent claims

A differential pressure sensor (105) for determining a differential pressure value, the differential pressure sensor (105) comprising:

a selector valve (110) configured to receive a first pressure at a first location and a second pressure at a second location that is spaced-apart from the first location;
a single-sided pressure sensor (120) coupled to the selector valve (110) and receiving either the first pressure or the second pressure;
and
a processing system (130) coupled to the single-sided pressure sensor (120) and configured to receive one or more first single-sided pressure measurements from the single-sided pressure sensor (120), subsequently receive one or more second single-sided pressure measurements from the single-sided pressure sensor (120), and generate the differential pressure value from the one or more first single-sided pressure measurements and the one or more second single-sided pressure measurements.

1 more element

A method for determining a differential pressure value, the method comprising:

measuring one or more first single-sided pressure measurements;
subsequently measuring one or more second single-sided pressure measurements, with the one or more first single-sided pressure measurements and the one or more second single-sided pressure measurements being measured by a single single-sided pressure sensor;
and
generating the differential pressure value from the one or more first single-sided pressure measurements and the one or more second single-sided pressure measurements.

1 more element

A method for determining a differential pressure value, the method comprising:

measuring a plurality of first absolute pressures;
subsequently measuring a plurality of second absolute pressures, with the plurality of first absolute pressures and the plurality of second absolute pressures being measured by a single single-sided pressure sensor;
determining a first absolute pressure value from the plurality of first single-sided pressure measurements;
determining a second absolute pressure value from the plurality of second single-sided pressure measurements;
and
generating the differential pressure value from the first absolute pressure value and the second absolute pressure value.

3 more elements

A method for determining a differential pressure value, the method comprising:

measuring a plurality of first absolute pressures;
subsequently measuring a plurality of second absolute pressures, with the plurality of first absolute pressures and the plurality of second absolute pressures being measured by a single single-sided pressure sensor;
generating a first best-fit curve from the plurality of first single-sided pressure measurements and using the first best-fit curve to determine a first absolute pressure value;
generating a second best-fit curve from the plurality of second single-sided pressure measurements and using the second best-fit curve to determine a second absolute pressure value;
and
generating the differential pressure value from the first absolute pressure value and the second absolute pressure value.

3 more elements

Dependencies are inferred from the claim text.

Differential pressure sensor and method

Life of this patent

Differential pressure sensor and method

Life of this patent

Abstract

Claims33