The Inspection of Wind Blades Using Thermography with Different Exciting Methods

In this paper, different exciting methods of active thermography, including the pulsed flash lamp exciting, halogen lamp step heating and ultrasonic exciting, were applied to detect different kinds of defects according to their different heat build-up properties. The results showed in the paper reveal that the themography is an available means to inspect some common defects in the wind blades. The paper also advises that use the flash lamp exciting for inspecting near surface defects, the halogen lamp step heating method for deeper ones, and ultrasonic exciting method for defects which have adjacent interfaces.