| 摘要 |
PURPOSE:To detect a rugged flaw in a pipe accurately, by irradiating the inner surface of a pipe with light generated from a light source for generating a visible light at a specified angle of illumination to photograph a shadow generated due to a defect on the inner surface of the pipe within it by an illumination. CONSTITUTION:This apparatus is provided with a light source 12 generating a visible light, a transmission light guide 14 for transmitting light into a pipe 10 and an illumination angle adjusting section 16 which reflects light transmitted to the guide 14 to irradiate the inner surface of the pipe 10 at the illumination angle theta of 10-60 deg.. It also has a camera section 18 for photographing a shadow generated due to a defect on the inner surface of the pipe 10 therewithin 10 by illumination, a transmission optical fiber 20 as an image transmission means for transmitting the image obtained outside the pipe 10, a receiver section 22 for receiving the image transmitted outside the pipe 10, a TV camera 26 connected thereto, a TV monitor 28 for displaying an image in expansion, a camera section holding body 30 for holding the illumination angle adjusting section 16 and the camera section 18 integrally, a holding body rotating section 32 for turning the holding body 30 and a moving frame 34 for moving the camera section holding body 30 forward or backward axially of the pipe 10. |
