Patent ID: 7758910
Filing Date: 2010-07-20
Classification: B05B,C23C,G01B

Abstract:
1. A method of measuring the thickness of a thermally applied coating as it is applied to a surface of a substrate, wherein thin ribbon is thermally applied from a spray gun, and overlapping ribbon portions form the coating as the spray gun progresses over the surface, said coating terminating in a step region on the surface, comprising: obtaining, during relative movement of the substrate and spray gun, at least one surface profile of the applied coating along a geometric line segment on said surface intersecting said ribbon and extending across said step region; and computing the thickness of the applied coating from said at least one obtained surface profile, wherein the surface profile is obtained by projecting a light beam along said line segment onto the surface of the substrate, and viewing the light beam at an oblique angle to the surface with a camera to record the profile of the projected light beam along said line segment.