Patent ID: 8496373

Claim:
A method of infrared inspection of inspecting a structure for defects by using an infrared camera, comprising: a test specimen attaching step of preparing a plate-shaped test specimen having a to-be-photographed surface and an attachment surface which is a back side of the to-be-photographed surface, attaching the test specimen to the structure with a to-be-inspected surface of the structure and the attachment surface of the test specimen opposed to each other, and providing an artificial abnormal portion forming a gap between surface of the structure and the test specimen; a test specimen photographing step of photographing the to-be-photographed surface of the test specimen by the infrared camera; a discriminating step of discriminating between the surface of the abnormal portion and the surface of a sound portion excepting the abnormal portion on the to-be-photographed surface of the test specimen by using an infrared thermal image of the test specimen; and a structure photographing step of photographing the to-be-inspected surface of the structure by the infrared camera in a time zone in which it is capable of discriminating between the surface of the abnormal portion and the surface of the sound portion.