Windmill vane has crack detection and surveillance device comprising at least one optic fiber fixed to or in vane material with crack occurrence causing break in optic fiber

摘要

The windmill vane has a crack detection and surveillance device (12) comprising at least one optic fiber (14,16) fixed to or in the vane material with crack occurrence causing a break in the optic fiber. A light sensor detects light emitted from one end of the optic fiber.