Method and system for non-destructive dye penetration testing of a surface
AssigneeHolores, Inc.
InventorPierre-Marie Pailliotet
Life of this patent
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Abstract
A method is presented for non-destructive testing of the state of a surface that may have cracks in it by observing waves emitted by a dye applied to the surface and present in the cracks in response to an incident excitation beam of wavelength appropriate to the dye. The incident excitation beam is an ultraviolet light. The beam is made of rectilinear polarized waves. Waves emitted by the dye are observed through a rotatable polarized wave analyzer. The analyzer is rotated first to eliminate from observation the wave due to the residual dye on the surface and thereafter to determine the depths of the cracks.
Claims14
A method of non-destructive testing of the state of a surface which may have cracks in it by observing waves emitted by a dye applied to the surface and present in the cracks in response to an incident excitation beam of wavelength appropriate to the dye, wherein the incident excitation beam is an ultraviolet light, wherein said beam is made of rectilinear polarized waves, wherein waves emitted by the dye are observed through a rotatable polarized wave analyzer, and wherein said analyzer is rotated first to eliminate from observation the wave due to the residual dye on the surface and thereafter to determine the depths of the cracks.
A system for implementing a dye penetration or magnetoscopic method using a dye applied to the surface and present in the cracks of a surface to be examined, which system includes:
- production means for producing a polarized ultraviolet beam,
- transmission means for guiding that beam toward the surface to be examined,
- observation means of observing the waves emitted by the dye when excited by said beam,
- wherein said production means are selected to provide a rectilinear polarized ultraviolet beam, and wherein the system comprises a rotatable polarized wave analyzer on the path of the waves emitted by the dye between the surface and the observation means, whereby a rotation of the analyzer allows first to eliminate progressively from the observation the waves due to the residual dye on the surface and thereafter to determine the depth of the cracks.
Dependencies are inferred from the claim text.