Device and method for checking the geometry of a hole bored...

G - Physics – 01 – B

Patent

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G01B 5/20 (2006.01) G01B 5/12 (2006.01) G01D 5/28 (2006.01)

Patent

CA 2232605

A sensor arm (1) is inserted into a hole (3). The arm is mounted on a pivot (5) perpendicular to the arm axis so that it may be urged into engagement with the wall of the hole, e.g. by an air cylinder (12). The pivot (5) is in turn rotated about an axis passing through the hole, preferably by means of a rotary body (10). A bearing piece (16) controlling the sensor arm may be moved towards or away from the hole and rigidly supports a light sensor (8) that receives a light beam (7) from the sensor arm. The geometry of the hole is determined on the basis of the position where the light beam impinges on the sensor and the position of the bearing piece relative to the hole.

Un bras palpeur (1) est introduit dans le trou (3). Il est monté sur un pivot (5) perpendiculaire à son axe, de façon à venir en appui sur la paroi du trou, par exemple en étant poussé par un vérin pneumatique (12). Le pivot (5) est lui-même entrainé en rotation autour d'un axe passant dans le trou, de préférence, par l'intermédiaire d'un corps rotatif (10). Une pièce d'appui (16) peut s'approcher ou s'écarter du trou en entraînant le bras palpeur, et elle porte de façon fixe un capteur photosensible (8) qui reçoit un rayon lumineux (7) envoyé par le bras palpeur. Connaissant la position de l'impact du rayon lumineux sur le capteur et la position de la pièce d'appui, par rapport au trou, on en déduit la géométrie du trou.

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