THICKNESS MEASURING DEVICE AND THICKNESS MEASURING METHOD

PROBLEM TO BE SOLVED: To provide a thickness measuring device and thickness measuring method that can detect the deviation of the thickness of an end of a cylindrical body in a short time by continuously measuring the thickness along the circumferential direction of the cylindrical body, and can be made enough simple to reduce the burden on a worker. SOLUTION: An inside displacement sensor 20 is rotated about the axis 11 of the cylindrical body 10 along the plane orthogonal to the axis 11 inside the cylindrical body 10, and the distance to the inner peripheral surface of the cylindrical body 10 is detected continuously. An outside displacement sensor 30 is rotated about the axis 11 of the cylindrical body 10 outside the cylindrical body 10 along substantially the same plane as the plane on which the inside displacement sensor 20 is rotated, and the distance to the outer peripheral surface of the cylindrical body 10 is detected continuously. At each position in the circumferential direction of the cylindrical body 10, the thickness of the cylindrical body 10 is calculated based on the total value of the respective distances detected by the outside displacement sensor 30 and the inside displacement sensor 20. COPYRIGHT: (C)2009,JPO&INPIT