Method and apparatus for locating a source of damage in a large composite material structure

摘要

Provided is a method of locating a damage source of a wind turbine blade for tracking a damage source location of a blade used in a wind power generator, and more particularly, a method of locating a damage source of a wind turbine blade and an apparatus thereof in a large composite material structure capable of accurately locating a damage source even in a large composite material structure by detecting defects using contour maps written based on elastic wave energy value. The method of locating a damage source of the wind turbine blade according to the present invention can accurately locate the damage source even in the large composite material structure using at least two materials unlike the related art and can use a smaller number of AE sensor than the related art.

主权项

1. A method of building a contour map for a damage source location in a nondestructive way using acoustic emission, comprising:
a first step of attaching at least two acoustic emission (AE) sensors within a portion to be located; a second step of generating test locations in a structure to be located; a third step of applying elastic waves to each of the test locations; a fourth step of measuring acoustic emission (AE) signals by each of the AE sensors; a fifth step of transforming the measured AE signals into times or frequencies and then into energy values; and a sixth step of databasing the transformed energy values as parameters of information on the each of the test locations, wherein the second step comprises: a step of partitioning the structure into lattices using the AE sensors and a step of selecting cross points of the lattices as the test locations, the third step comprises: a step of applying the elastic waves to each of the test locations two or more times by changing a size of each of the elastic waves, and the sixth step comprises: a step of databasing the transformed energy values as the parameters according to the size of each of the elastic waves.