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

  • US 9,562,870 B2
  • Filed: 09/27/2011
  • Issued: 02/07/2017
  • Est. Priority Date: 09/28/2010
  • Status: Active Grant
First Claim
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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.

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