Method and apparatus for determining the contents of a gas bottle
US6247361A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 1999 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | May 11, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/2966
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a method for determining the contents of a gas bottle, in particular a liquid gas bottle, comprising the following steps: First of all, the gas bottle is excited by applying a signal to a loudspeaker mounted on said gas bottle. The signal from a microphone mounted on the gas bottle is compared in phase with the signal used for excitation, with the frequency of the signal applied to said loudspeaker being altered continuously, until a resonant frequency is established. This resonant frequency is converted into a filling level of the gas bottle according to a previously determined relationship between the resonant frequency and the filling level. Furthermore, an apparatus is disclosed with which the above-mentioned method may be put into practice.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.