Apparatus and method for detecting the level of a liquid

Details Apparatus and method for detecting the level of a liquid Apparatus and method for detecting the level of a liquid

G - Physics

01

F

G01F 23/00 (2006.01) G01F 23/292 (2006.01)

Patent

CA 2335531

Light from a light source (2) is conducted through a light conducting element (4) which is partially submerged in a liquid (12). Light escaping from the light conducting element (4) is scattered by the meniscus (14) of the liquid and the scattered light is collected by a lens (6) and focused to form an image at a detector (8). The meniscus appears as a bright band in the image formed at the detector (8) and the position of the band in the image is used to determine the level of the liquid.

Pour cette invention, la lumière provenant d'une source de lumière (2) est conduite via un élément photoconducteur (4) qui plonge partiellement dans un liquide (12). La lumière s'échappant de l'élément photoconducteur (4) vient se diffuser au niveau du ménisque (14) formé par le liquide. La lumière diffusée est recueillie par une lentille (6) puis focalisée de façon à former une image au niveau d'un détecteur (8). Le ménisque est représenté par une bande brillante dans l'image se formant au niveau du détecteur. On se sert alors de la position de la bande dans l'image pour déterminer le niveau du liquide.

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