Patent ID: 9644492
Date: 2017-05-09
CPC Classifications: F01D,F03D,F05B,G01M,G01N,Y02E,Y10T

Claim:
1. An indicator device for detecting a delamination of a composite material, including for detecting a delamination of a composite material of a wind turbine, or for detecting a delamination of a composite material of a wind turbine rotor blade, the indicator device comprising: a first part arranged to fit into a hole in the composite material, wherein the hole spans at least a top layer and exposes a bottom layer of the composite material, and wherein when installed the first part is secured to the bottom layer, a second part arranged to fit into the hole, wherein when installed the second part is secured to the top layer, and an electric circuit that defines a loop in the hole, wherein the first part comprises at least a part of a lower part of the electric circuit, the second part comprises at least a part of an upper part of the electric circuit, and the lower part and the upper part are electrically connected to each other at a predetermined breaking point forming the electric circuit such that when the indicator device is in use in a composite material, if a delamination of the respective composite material occurs, the electric connection between the lower part and the upper part breaks at the predetermined breaking point, thus cutting the electric circuit.