Apparatus for high precision measurement of varied surface...

G - Physics – 01 – F

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G01F 23/26 (2006.01) G01D 5/16 (2006.01) G01F 23/68 (2006.01)

Patent

CA 2744871

An apparatus and method for measuring the level of a wide range of varied surfaces or materials housed within vessels, and for detecting contact with a solid surface within the vessel is disclosed. A high precision radio frequency admittance measuring system, using capacitance to measure levels of process materials, coupled with detection element to sense contact of the detection element with a solid surface, such as a floating roof. An active element and ground element in coaxial relationship provides means for measuring the level of process materials including water, oil, kerosene, jet fuel, gasoline. Along with detecting the level of a solid surface within the vessel such as a floating roof. One preferred application of the inventive apparatus is to provide vessel or tank overfill protection. The apparatus detection element is capable of sensing level and non-level solid surfaces.

Linvention concerne un appareil et un procédé qui permettent de mesurer le niveau d'une large gamme de divers surfaces ou matériaux contenus dans des récipients, ainsi que de détecter un contact avec une surface solide à l'intérieur du récipient. Linvention concerne un système de mesure de ladmittance radiofréquence haute précision, utilisant une capacitance pour mesurer des niveaux de matériaux de traitement, ce système étant couplé à un élément de détection pour détecter le contact de lélément de détection avec une surface solide telle quun toit flottant. Un élément actif et un élément de masse en relation coaxiale forment des moyens de mesure du niveau de matériaux de traitement tels que leau, le pétrole, le kérosène, le carburant avion, lessence. Linvention concerne également la détection du niveau dune surface solide, dans le récipient, telle quun toit flottant. Une application préférée de lappareil de linvention consiste à assurer la protection contre le débordement du récipient ou du réservoir. Lélément de détection de lappareil est capable de détecter des surfaces solides de niveau ou non.

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