Method and device for nondestructively testing fluid-filled...

G - Physics – 01 – M

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G01M 3/40 (2006.01) G01N 21/66 (2006.01)

Patent

CA 2274595

The invention concerns a method and corresponding device for nondestructively testing fluid-filled containers for leaktightness. The containers (17) to be tested are held ready in an evacuated receptacle (2) which is connected to a vessel (1, 1a - 1d) in which a gas discharge can be carried out. When the volatile contents of the container are discharged by means of a leakage in a container, the brightness of the gas discharge is noticeably reduced with respect to the brightness in the initial situation when only the residual gas molecules in the air are present in the vacuum. This change in brightness, detected by light-sensitive sensors (9), is proportional to the concentration of the volatile substances, such that, on the basis of a calibration curve, an evaluation circuit (10) can immediately provide information about the concentration of the respective substances.

L'invention concerne un procédé et un dispositif permettant d'effectuer une vérification non destructive de l'étanchéité de récipients remplis de liquide. Les récipients (17) à vérifier sont placés dans un contenant (2) dans lequel le vide a été fait et qui est relié à une cuve (1, 1a à 1d) dans laquelle une décharge gazeuse peut être effectuée. Lorsque les substances volatiles contenues dans le récipient sortent par une fuite dans un récipient, la luminance de la décharge gazeuse est considérablement réduite par rapport à la luminance existante dans la situation initiale, lorsqu'il ne subsiste dans le vide que les molécules gazeuses résiduelles de l'air. Cette modification de la luminance détectée par des détecteurs (9) photosensibles est proportionnelle à la concentration des substances volatiles, de manière que sur la base d'une courbe d'étalonnage, il soit possible au moyen d'un circuit d'évaluation (10), de fournir directement des informations sur la concentration de chacune des substances.

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