Method and system for helping to position a component on a structural element

A method for helping to position a piece on a wall of an element of a structure, the method comprising the following steps:

• elaborating an image intended to be projected on the wall of the structural element using a projector from a virtual model of the structure and from a position and an orientation of the projector with respect to the structure, the image including an outline delimiting an area for implanting the piece on the wall of the element of the structure, the wall of the element of the structure being used as a projection substrate for said outline, and at least one additional motif providing positioning information of the piece with respect to a direction normal to the wall of the element of the structure, said additional motif corresponding to a predefined set of points of the piece, said piece being used as a projection substrate for the at least one additional motif;
• projecting the elaborated image on the element of the structure;
• placing a surface of the piece which should come and face the wall, inside the outline projected on the element of the structure;
• and
• while keeping contact between the piece and the element, modifying the positioning of the piece with respect to the direction normal to the wall of the element, until said predefined set of points of the piece coincides with said additional motif.