Method and device for determining the smoke point of...

G - Physics – 01 – N

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Details

G01N 21/72 (2006.01) G01N 25/00 (2006.01) G01N 33/28 (2006.01)

Patent

CA 2592458

The invention relates to a method for determining the smoke point of a hydrocarbon, comprising, among the different steps defined in the ASTM D 1322 standard or equivalents thereof, the identification, among different aspects of the flame according to the position of the burner in the lamp, of a particular aspect of the flame and the reading of the height of this flame on a graduated scale in mm. The invention is characterized by the fact that a series of digital images of the flame is taken and recorded with the aid of a digital camera or the like at intervals sufficiently close for permitting, by analyzing these digital images, the detection of a sudden change in the shape of the flame, and that the height of this flame is measured at the moment of this sudden change in its shape, said height being considered as the smoke point of the tested hydrocarbon.

L'invention concerne un procédé pour la détermination du point de fumée d'un hydrocarbure, comprenant parmi les différentes étapes définies dans la norme ASTM D 1322 ou ses équivalents, le repérage, parmi différents aspects de la flamme en fonction de la position du brûleur dans la lampe, d'un aspect particulier de la flamme et la lecture de la hauteur de cette flamme sur une échelle graduée en mm, caractérisé par le fait que l'on prend et enregistre, à l'aide d'une caméra numérique ou d'un équivalent d'une telle caméra, une série d'images numériques de la flamme à des intervalles suffisamment rapprochés pour permettre, par analyse de ces images numériques, la détection d'un changement brusque de la forme de la flamme, et que l'on mesure la hauteur de ladite flamme au moment de ce changement brusque de sa forme, la dite hauteur étant assimilée au point de fumée de l'hydrocarbure testé.

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