| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple measurement method for minutely measuring a true shape of a strip-shaped body in its entirety, the body moving at a high speed with its height varying. SOLUTION: According to this shape measurement method of an optical cutting mode, a linear laser light source with its output modulated is used to form an optical cut image on the strip-shaped body, and a linear sensor of a delay integration type is used on the imaging side to perform overlap-imaging while shifting the cut image bit by bit, thus restoring the shape of the strip-shaped body. In this method, a widthwise position including only vibration components is searched for and a lengthwise height variation of a plate at this position is subtracted from a shape including vibration to remove the vibration, thereby measuring an original shape. Further, wave pitches are found from a change in the length of a widthwise cross-sectional curve while finding an elongation percentage from the length of a longitudinal height curve of the plate to simply calculate a wave height by sine-wave approximation. COPYRIGHT: (C)2006,JPO&NCIPI
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