Method of and apparatus for determining the level of liquid in a vessel
US4535627A · kind A · utility
59Cited by
8References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1983 |
| Grant date | Aug 20, 1985 |
| Priority date | — |
| Expiry date | Mar 31, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/908
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A container of known volume, such as a fuel tank of an automotive vehicle, is provided with a loudspeaker-like membrane which can be energized to produce a pressure pulse in the gas space above the liquid in the container. The oscillations of this gas space are then converted into a signal via the diaphragm and the period of the signal is determined to provide the volume of the gas space. This is subtracted from the gas volume of the container automatically to indicate the liquid volume and the liquid volume can be displayed on the dashboard of the vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.