Air flow measurement
AssigneeSiemens Industry, Inc.
InventorsMark C. Hersch, Howard St. John, Kevin Johnson
Life of this patent
Estimating the term…
Abstract
An arrangement for measuring air flow includes a source of measurement values and a processing unit. The source of measurement values is operable to generate measurement values representative of a difference in pressure from air obtained on a first side of an obstruction and air obtained on a second side of the obstruction. The processing unit is configured to, in one case, convert any negative measurement values of the measurement values to a less negative value. The processing unit is further configured to perform low pass filtering on the measurement values and convert the filtered measurement values to a flow value.
Claims20
An arrangement for measuring air flow, comprising:
- a source of measurement values representative of a difference in pressure from air obtained on a first side of an obstruction and air obtained on a second side of the obstruction, wherein the measurement values are representative of a difference in pressure from air obtained on the first side of the obstruction when the first obstruction is exposed to atmospheric pressure;
- a processing unit configured to,
- perform digital processing to convert any negative measurement values of the measurement values to a less negative value;
- perform low pass filtering on the measurement values;
- and
- convert the filtered measurement values to a flow value.
An arrangement for measuring air flow, comprising:
- a source of measurement values representative of a difference in pressure from air on a first side of an obstruction exposed to atmospheric pressure and air on a second side of the obstruction;
- a processing unit configured to,
- perform digital processing to convert any negative measurement values of the measurement values to a less negative value;
- perform low pass filtering on the measurement values;
- and
- convert the filtered measurement values to a flow value.
An arrangement for measuring air flow, comprising:
- a source of measurement values representative of a difference in pressure from air on a first side of an obstruction and air on a second side of the obstruction, the obstruction positioned within an air flow conduit, and the air flow conduit extending above a roofline;
- a processing unit configured to,
- perform digital processing to convert any negative measurement values of the measurement values to a less negative value;
- perform low pass filtering on the measurement values;
- and
- convert the filtered measurement values to a flow value.
Dependencies are inferred from the claim text.