Societe Nationale Industrielle Et Aerospatiale

Jean-Louis Arnaud

Michel Floret

The present invention relates to a process and device for the non-destructive examination of riveted joints or the like, particularly for monitoring the fuselage of an aircraft. According to the invention, an eddy current probe is used and two rectangular components of the signal of unbalance from the latter are compared with thresholds predetermined by prior measurements on similar new joints, in order to determine the presence and/or the absence of cracks.

Process and device for the detection of cracks in riveted joints using

The invention relates to a portable device for the non-destructive examination of a surface along a line, by means of at least one detection probe displaced along said line and guided by a guide removably fixed on said surface, wherein said guide has a length such that any portion of said line of comparable length presents a negligible variation in curvature, said probe is mounted in a probe-holder adapted to be displaced by hand and connected to said guide in rigid manner parallel thereto and in loose manner transversely to said guide, and means are provided for indicating, at each instant of a displacement of said probe-holder along said guide, the position of the probe-holder on the latter. The invention is particularly applicable to the verification of the riveted joints of aircraft fuselages.

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Verrieres-le-Buisson, France

Jean-Louis Arnaud