Method for optically detecting gas bubbles moving in a coolant

Details Method for optically detecting gas bubbles moving in a coolant Method for optically detecting gas bubbles moving in a coolant

1996-12-12

1999-01-26

Buczinski, Stephen C.

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

7386105, G01P 336, G01F 1708

Patent

active

058643923

ABSTRACT:
For optical detection of the velocity of gas bubbles in the cooling liquid of an internal combustion engine, light is radiated into the coolant by means of at least one emitter, and the scattered light caused by the gas bubbles, or rather, the change in intensity of light radiation emitted into the coolant, is measured by an optical sensor. The scattered light or intensity change is measured in at least two adjacent areas, and the velocity of the bubbles is determined from the travel time between the measurement signals.

REFERENCES:
patent: 3867033 (1975-02-01), Hasinger
patent: 4659218 (1987-04-01), De Lasa et al.
patent: 4856895 (1989-08-01), Parker
patent: 4978863 (1990-12-01), Lyons et al.
patent: 5033858 (1991-07-01), Twerdochlib et al.
patent: 5170060 (1992-12-01), Maillard et al.

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