Device for measuring a fill level of a liquid in a container
US6427532B1 · kind B1 · utility
10Cited by
10References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 5, 2000 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Nov 15, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02836
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for measuring a fill level of a liquid includes an ultrasonic sensor with two sensor elements. One of the sensor elements determines the echo time of an ultrasonic wave to a float which follows the liquid level. The other of the sensor elements determines the echo time of the ultrasonic wave up to a measuring reflector arranged at a known distance from the other of the sensor elements. An evaluation unit compares the echo times and determines the fill level of the liquid from the ratio of echo times and from the known distance to the measuring reflector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.