Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2008-05-13
2008-05-13
Luu, Thanh X. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S574000, C356S441000
Reexamination Certificate
active
10536472
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 is made aware of said average value proportional to said bubble content in the liquid.
REFERENCES:
patent: 4659218 (1987-04-01), de Lasa et al.
patent: 4740709 (1988-04-01), Leighton et al.
patent: 4749871 (1988-06-01), Galvin et al.
patent: 4885676 (1989-12-01), Zweighaft
patent: 4902137 (1990-02-01), Krieg et al.
patent: 5508521 (1996-04-01), Kraft et al.
patent: 6315955 (2001-11-01), Klein
patent: WO 98/55849 (1998-12-01), None
Livedalen Brian J
Luu Thanh X.
Osha & Liang LLP
SC2N Societe Anonyme
LandOfFree
Optical detector for the presence of gas bubbles in a liquid does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical detector for the presence of gas bubbles in a liquid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical detector for the presence of gas bubbles in a liquid will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3926599