| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal inspection device capable of accurately grasping internal conditions of a pipeline and ground in pipeline measurement and bore hole measurement. SOLUTION: The internal inspection device 1 comprises an angle detector 2 for detecting a pitch angle, an azimuth angle, a roll angle, and noncontact displacement sensors 3, 4 for detecting the amount of play to a wall surface in a pipe or a hole of the angle detector 2, and the device 1 is inserted into a hole in the pipe or the ground and can be moved inside. Also, the device includes a photographing means for photographing the inside of the pipe or the hole. COPYRIGHT: (C)2007,JPO&INPIT
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