| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method and device for efficiently measuring a shape of a band-like member by measuring the amounts of displacement at a plurality of points such as end positions of the band-like member without increasing the number of cameras, and to provide a displacement sensor for use in the device. <P>SOLUTION: The device for measuring a shape of a band-like member includes a laser device 121 for applying a laser beam extending along a longitudinal direction of a band-like member 40 to a surface of the band-like member 40, an image capturing means 14 for capturing a reflected image of the laser beam, and a displacement amount measuring means 15 for measuring the amount of displacement of the band-like member 40 from the reflected image, and measures a surface shape of the band-like member on the basis of the amount of displacement of the band-like member 40 measured by the displacement amount measuring means 15. In the device, the amounts of displacement at a plurality of points in a width direction of the band-like member 40 are measured by separating the applied laser beam into a transmitted beam and a diffracted beam by diffraction and applying a plurality of laser beams T1-T3 apart from each other in the width direction of the band-like member 40 to the band-like member 40. <P>COPYRIGHT: (C)2012,JPO&INPIT |
