Patent · US Active

Method and apparatus for the remote nondestructive evaluation of an object using shearography image scale calibration

US8553233B2 · kind B2 · utility

12Cited by
8References
24Claims
0Family size

Inventor

Key dates

Filing dateDec 30, 2012
Grant dateOct 8, 2013
Priority date—
Expiry dateDec 30, 2032

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01N25/00
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A method and apparatus for the remote nondestructive evaluation of an object such as a wind turbine blade involves applying mechanical and/or thermal stress to the object and then scanning the object using long-range thermographic and/or laser interferometric imaging. The laser interferometric imaging is preferably performed by a long range shearography camera capable of imaging deformation derivatives at long distances coupled with a blade stressing mechanism incorporating either thermal or internal blade pressurization for the purpose of detecting remotely and at high speed, changes in the structural integrity of an installed wind turbine blade.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.