Air flow measurement
US6598462B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 2001 |
| Grant date | Jul 29, 2003 |
| Priority date | — |
| Expiry date | Nov 13, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B13/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An air flow measurement apparatus for verifying one or more apertures in a test piece 126 by mounting the test piece in an air flow such that air flows through the aperture(s) therein. The apparatus comprises a servo pilot valve 114 for adjusting the air flow from the source 104, a pressure sensor P3A for measuring the flow and a computer for determining the effective area of the test piece 126 at a range of different pressures across the test piece, the range including a desired pressure differential. The computer continuously tracks the readings and, when sufficient data has been obtained, computes a curve fit to calculate the effective area of the test piece 126 at the exact specified pressure differential.The present invention avoids any problems associated with differences in atmospheric pressure as well as any problems that are associated with obtaining the exact desired pressure differential across the test piece 126.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.