Aerospatiale Societe Nationale Industrielle

Societe Anonyme Aerospatiale Societe Nationale Industrielle

Jacques Bouteyre

Christian Le Floc'h

A vessel made of composite material wound on a metallic liner is tested via holographic interferometry, in which the interference of two holographic images of a tested zone are taken under two different states of thermal cycling. The thermal cycling is homogeneously applied to the entire liner, via a heated fluid placed inside the vessel. The interferogram is made outside the vessel, where a second image is made after having raised the liner to a temperature different from the one duly measured when the first image is made. The second image shot is controlled by the detection, outside and near the vessel, of a variation of the outer infrared radiation emitted by the vessel, resulting from the liner temperature variation being equal to a predetermined threshold value.

Method and apparatus for the nondestructive testing of vessels made of

This invention concerns a device for the non-destructive inspection of a part (6) by means of optical holography. This device includes a source (2) emitting a laser beam and a holographic camera (4) placed at a certain distance from the source (2) and close to the part to be inspected (6); the laser beam is transmitted from the source (2) to the camera (4) by means of a beam of sequenced optical fibers (8) suitable for transmitting a high-powered laser beam, while maintaining the coherence of space and time of this laser beam. The device is suitable for interferometry nondestructive inspection applications.

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Saint Medard En Jalles, France

Jacques Bouteyre