Optical detector for the presence of gas bubbles in a liquid
US7372063B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 2003 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | Nov 25, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/49
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention concerns a method for detecting gas bubbles in a liquid adapted to a device comprising a light source, a light detector and a data controlling and processing unit connected to a client system comprising the following steps: emitting light from the light source, acquiring successive measurements of the light intensity sensed by the light detector and calculating a variation between two successive measurements of said light intensity. In accordance with a first embodiment of the invention, the method further comprises a step which consists in comparing the variation between two successive measurements of light intensity to a threshold S. Advantageously, a warning counter is incremented by a value A when variation between two successive measurements is higher than the threshold S and decremented by a value B in the opposite case. A proportion of bubbles higher than a maximum authorized rate is detected when said warning counter exceeds a warning value C. In a second embodiment of the invention, the method further comprises a step which consists in calculating an average value between the variations between two successive measurements of light intensity. The client system…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.