Shear beam load cell

G - Physics – 01 – G

Patent

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Details

G01G 3/14 (2006.01) G01G 3/18 (2006.01) G01L 1/22 (2006.01) G01L 1/26 (2006.01)

Patent

CA 2248571

A shear beam load cell comprising a cantilevered beam member (1) for measuring the shear force imposed on the beam member by the load (F) to be measured and one or more strain gauges mounted on the beam member so that they are affected by the deformation in the beam material. The free deflectable end portion (2) of the beam (1) has a section (10) with reduced material thickness, the upper side of this section being located substantially along the longitudinal neutral axis of the beam and defining a load application surface (11) for the load (F) to be measured. The load application surface (11) has a longitudinal extension, along the neutral axis or its extension, so that the point-of-load application for the load (F) to be measured can be moved along the load application surface in case of thermal expansions due to temperature variations in a tank, weighing container, foundation or the like.

Capteur de force en poutre travaillant en cisaillement comprenant un élément formant poutre en porte-à-faux (1) permettant de mesurer les efforts de cisaillement imposés à la poutre par la charge (F) devant être mesurée et une ou plusieurs jauges de contrainte montées sur la poutre de manière à être affectées par la déformation de la matière constitutive de cette poutre. L'extrémité libre (2) pouvant être défléchie de cette poutre (1) présente une section (10) à épaisseur de matière réduite, la face supérieure de cette section étant située essentiellement dans l'axe longitudinal neutre de la poutre et définissant une surface d'application (11) pour la charge (F) à mesurer. Cette surface d'application de charge (11) comporte un prolongement longitudinal, selon l'axe neutre ou selon son prolongement, de telle sorte que le point d'application de la charge (F) à mesurer puisse être déplacé le long de la face d'application de la charge en cas de dilatation thermique résultant des variations de températures de la cuve, du conteneur de pesée, des fondations ou de tout autre élément.

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