Device for measuring the surface pressure

G - Physics – 01 – N

Patent

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Details

G01N 13/02 (2006.01) G01L 11/02 (2006.01)

Patent

CA 2265843

The object of the invention is a device for measuring the surface pressure of a film formed at the interface of a liquid and gaseous phase, the device comprising a detector means and a sensor means. The detector means comprises a light source and a position-sensitive detector, the active surface of which is situated in the light beam of the light source, and the sensor means comprises a sensor which can be brought into contact with the film to be measured, and a shading means which, in correspondence with the force applied to the sensor by the film, moves in the light beam between the active surface of the detector and the light source.

Cette invention se rapporte à un dispositif servant à mesurer la pression superficielle d'un film formé à l'interface d'une phase liquide et d'une phase gaseuse, ce dispositif comprenant un moyen détecteur et un moyen capteur. Le moyen détecteur comprend une source de lumière et un détecteur sensible à la position, dont la surface active est située dans le faisceau lumineux de la source de lumière et le moyen capteur comprend un capteur qui peut être placé en contact avec le film à mesurer, ainsi qu'un moyen écran, qui, en correspondance avec la force appliquée au capteur par le film, vient se placer dans le faisceau lumineux entre la surface active du détecteur et la source de lumière.

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