INSTALACION PARA LA DETERMINACION DE LAS COORDENADAS ESPACIALES DE UN PUNTO DE UNA PIEZA, PRINCIPALMENTE PARA EL CONTROL DE UN UTILLAJE TAL COMO UN UTILLAJE PARA SOLDAR LA CARROCERIA DE UN VEHICULO AUTOMOVIL

摘要

An installation for determining the spatial coordinates of a point (P) on a piece (7) in particular for controlling a plant such as a welding plant for car bodies of motor vehicles. The installation is characterized in that it comprises a head (11) movable in a plane (X-Y) and produces a signal as a function of the distance of the point (P) in relation to the plane (X-Y), a rotor (13) on the head (11), this rotor comprising means for projecting a rotating laser beam (214), at least three fixed targets (Q, R, S) arranged in the plane (X-Y) and the coordinates of which in this plane are known, these targets being capable of producing a signal as a function of the position (XP-YP) of the head (11) and hence of the point to be measured (P) in the plane (X-Y). The invention is applicable to an installation for determining the spatial coordinates of a point.