Method and device for non-destructive testing of wind turbine blades

摘要

The method CND of non-destructive testing of a wind turbine blade includes: stressing the structure of the blade through a modification of a physical characteristic of a fluid filling the hollow interior volume of the blade; observing zones to be tested of the exterior surface of the blade, with the contactless measurement of a physical parameter on points of the exterior surface of the blade; and comparing the map of the values of the physical parameter measured with a reference map. A corresponding system CND for checking the structural integrity of a wind turbine blade includes an aerothermic device for modifying the physical conditions, temperature or pressure, of a fluid filling the hollow interior volume of the blade, a device for contactless measurement of a physical parameter, temperature or dimensions, of the exterior surface of the blade, and a device for processing the measurements.

主权项

1. A NDT method (200) for non destructive testing of a wind turbine blade (10) attached to a wind turbine (100), a structure of said blade including a skin (13) determining a blade external surface (19) and a hollow volume (18) at the interior of the blade, said NDT method including:
a first step (201) for loading the blade structure, fixed to a turning shaft attached to a technical nacelle (30) located in an upper part of a carrying post (20), by a modification of at least one physical characteristic of a fluid filling out the blade hollow volume (18), using an aerothermic device (40) installed in the wind turbine; a second step (202) for observing regions of the external surface (19) to be checked, said observation comprising the carrying out of contactless measurement with a measurement sensor, fixed remotely from the wind turbine, of at least one physical parameter, sensitive to the loading of the first step (201), on points of the external surface (19) in order to establish a measured map of the physical parameter values measured for said regions to be checked; and a third step (203) for detecting structural anomalies in the blade by comparing values measured during the second step with expected values for a blade without any notable defect.