Monitoring method and device by shadowscopy
AssigneesCommissariat a l'Energie Atomique, Compagnie Generale des Matieres Nucleaires
InventorChristophe Chagnot
Life of this patent
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Abstract
A monitoring device by laser shadowscopy, which comprises a light emitter (5) and receiver (6), mounted on an arm (8) oscillating at will around two joints (13, 14), in order to restore the image of the monitored profile more accurately. An important application relates to welding methods and especially in hollow beveled edges.
Claims12
A monitoring device comprising a supporting member, a light emitter, a receiver for the light emitted from the emitter, and an arm having opposite ends with the light emitter and receiver mounted at each opposite end of the arm, said monitoring device further comprising an adjustable joint connecting the arm to the supporting member to allow for rotation of the arm with respect to the supporting member about two axes of rotation (y, z) perpendicular to each other and to a main path (x) of light emitted in the form of a light beam from said emitter for illuminating a scene to be monitored with one of said two axes of rotation intersecting said light beam.
A method for monitoring a scene, using a monitoring device comprising a supporting member, a light emitter, a receiver of light emitted by the light emitter, an arm having opposite ends with the light emitter and receiver mounted at each opposite end of the arm and an adjustable joint connecting the arm to the support member to allow for rotation of the arm with respect to the support member about two axes of rotation, comprising the steps of:
- emitting light from said emitter as a beam having a main path of light intersecting at least one of the two axes of rotation at an angle perpendicular thereto;
- locating the device so that the main path is tangent to the scene;
- and
- imparting oscillations to the arm about the two axes of rotation and repeatedly measuring parameters of the scene.
Dependencies are inferred from the claim text.