1984, The optical system for measuring absolute of a liquid level in a container by correlation of shots

摘要

Digital system for absolute optical measurement of a level of liquid in a container by correlation of photographs This optical system for measuring a level of liquid (L) in a container (C), comprises a support (2), a guidance axis (3) extending from the support and comprising an optical sight (9) comprising distinct binary codes each corresponding to a step change of level of liquid in the container, and a mobile float (7) able to slide along the guidance axis according to the level of liquid (L). It comprises at least one photography assembly (10) mounted on the float and comprising a lighting member (10a) for the sight and a photography device (10b) able to acquire two-dimensional images of the sight, said images acquired by the photography device encompassing a set of several binary codes corresponding to a set of respective step changes of level making it possible to determine the level of liquid, even in the presence of impurities blotting out a part of the image of the sight.