Method for measuring a wall thickness of a hollow vane
AssigneesSnecma Moteurs, Centre National De La Recherche Scientifique
InventorsYann Le Bihan, Olivier Lespinet, Alain Mourenko, Franck Paul Dominique Vital Panizzoli, Dominique Marc Bruno Placko, Edouardo-Agapito Santander-Rojas
Life of this patent
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Abstract
An eddy current detector includes two poles aligned in the direction of extension of partitions located behind a wall, wherein the thickness must be measured, but which interfere with the measurements. The influence of the partitions is decreased by the core of the detector including two poles aligned in the direction of the extension of the partitions and by using a logical system to correct the results obtained according to preliminary results obtained on a reference surface.
Claims9
Method to measure thickness of a hollow vane wall configured to cover partitions, comprising:
- applying two poles of a magnetic core of an eddy current detector on the wall in parallel alignment with the partitions, the poles being equipped with coils connected to each other in series;
- moving the detector on the wall perpendicular to the partitions;
- recording a first signal produced by the detector;
- and
- deducing the thickness of the wall according to preliminary calibrations and at least the first signal.
Method to measure thickness of a hollow vane wall configured to cover partitions, comprising:
- applying poles of a magnetic core of an eddy current detector on the wall in parallel alignment with the partitions, the poles being equipped with coils connected to each other in series;
- moving the detector on the wall perpendicular to the partitions;
- providing a first signal in the coils;
- recording a characteristic of the first signal that depends on the thickness of the wall;
- and
- deducing the thickness of the wall according to preliminary calibrations made by the detector on reference walls having different known thicknesses and at least the characteristic of the first signal that depends on the thickness of the wall.
Dependencies are inferred from the claim text.