| 摘要 |
A method of measuring an inner diameter and a configuration of an inner surface of a tube to be measured, comprising: holding a rotating shaft of a measuring head by a rotary bearing unit movable in a lengthwise direction of said tube and positioned at the center thereof, said measuring head being provided with a radius measuring sensor attached thereto; and rotating said measuring head by rotating said rotating shaft with said rotatory bearing unit kept stationary at one position in the lengthwise direction of the tube to successively measure, at various rotational angles, radii of the tube and rotational angles at which the respective radii are measured, thereby determining an inner diameter of the tube and a configuration of an inner surface in a circumferential direction thereof. |
