Inline measuring device with a vibration-type measuring sensor

G - Physics – 01 – F

Patent

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Details

G01F 1/84 (2006.01) G01F 15/14 (2006.01) G01M 3/28 (2006.01)

Patent

CA 2608392

The in-line measuring device serves to measure an, in particular, gaseous and/or liquid medium flowing inside a pipe. To this end, the measuring device comprises a vibration-type measuring sensor and measuring device electronics electrically coupled to the measuring sensor. The measuring sensor comprises: at least one measuring tube, which communicates with the pipe and which vibrates when in operation; an electromechanical, in particular, electrodynamic exciting arrangement, which acts upon the at least one measuring tube and which serves to generate and maintain mechanical vibrations of the measuring tube; a sensor arrangement for generating at least one vibration measurement signal, which represents vibrations of the measuring tube, with at least one vibration sensor placed on the measuring tube or in the vicinity thereto, and; a measuring sensor housing. In the in-line measuring device, the invention provides that the measuring device electronics monitor a static internal pressure inside the measuring sensor housing and/or a tightness of the at least one measuring tube.

L'invention concerne un appareil de mesure en ligne pour mesurer un milieu sous forme gazeuse et/ou liquide s'écoulant dans un conduit. Cet appareil comprend un capteur de mesure de type à vibrations et un système électronique du dispositif de mesure électriquement couplé au capteur de mesure. Ce capteur de mesure comporte les éléments suivants : au moins un tube de mesure vibrant lorsqu'il est en service, en communication avec le conduit ; un ensemble d'excitation électromécanique, notamment électrodynamique, agissant sur le tube de mesure pour générer et maintenir des oscillations mécaniques sur ledit tube de mesure ; un ensemble de détection pour générer au moins un signal de mesure d'oscillations représentant les oscillations du tube de mesure, au moins un capteur de vibrations étant monté sur le tube de mesure ou à sa proximité ; un boîtier de capteur de mesure. Selon l'invention, le système électronique du dispositif de mesure en ligne surveille en outre la pression interne statique à l'intérieur du boîtier du capteur de mesure et/ou l'étanchéité du tube de mesure.

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