METHOD FOR CHECKING THE LINEAR DIMENSIONS OF THREE-DIMENSIONAL OBJECTS

A method for carrying out 3D measurements of an object, in which specified non-intersecting images oriented along one of the longitudinal axes with a consistent distance therebetween are projected onto the object under investigation with the aid of a projector, the projector light reflected by the object is recorded with the aid of at least one camera placed so as to form a triangulation angle between a central beam of the projector and central beams of the cameras, and then the images projected by the projector and formed by the reflected light received by the camera are identified, wherein the triangulation angle between the central beam of the projector and the central beam of the camera is selected to be equal to an arc tangent of the ratio of the distance between the images being projected to the depth resolution of the camera lens, the longitudinal coordinates of the centres of the images and the vertical coordinates are determined on the camera image, as a quotient of the division of the longitudinal coordinate by the tangent of the triangulation angle between the central beam of the projector and the central beam of a first camera, wherein each of the images which are projected onto the object under investigation by the projector constitutes a discrete sequence of geometrical elements uniformly arranged along a rectilinear trajectory, which is parallel to the trajectory of another image, and the images projected by the projector and formed by the reflected light received by the camera are identified by identifying a section of displacement of each of the projected geometrical elements, wherein the projector light reflected by the object is recorded with the aid of at least one camera positioned at an angle to the projector both in the vertical plane and in the horizontal plane. This provides for a reduction in the irregularity of the measurements obtained along the Y axis, an increase in sensitivity along the Z axis and virtually complete elimination of errors, i.e. an increase in the accuracy of the images. L'invention concerne la réalisation de mesures 3D d'un objet; à l'aide d'un projecteur, on projette sur l'objet étudié des images données ne se chevauchant pas et orientées le long d'un des axes longitudinaux avec une distance constante entre eux, on enregistre la lumière du projecteur réfléchie par l'objet à l'aide d'au moins une caméra disposée de manière à former un angle de triangulation entre le faisceau central du projecteur et les faisc