Methods and apparatus for measuring the tightness of enclosures
US4635469A · kind A · utility
Inventors
Key dates
| Filing date | Jun 21, 1985 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | Jun 21, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/3236
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed are methods and apparatus for measuring tightness of an enclosure such as a building by utilizing alternating pressurization techniques. One method comprises providing apparatus capable of causing an internal volume change for the enclosure, the apparatus including a means for determining the instantaneous volume change, and a means for determining the instantaneous pressure within the enclosure. The apparatus is operated within the enclosure to change the volume thereof, and at least one of the frequency and the displacement is adjusted to achieve a root mean square pressure in the enclosure approximately equal to a reference pressure. At that pressure, the leakage of the enclosure is determined from the instantaneous displacement and instantaneous pressure values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.