MEANDER FREQUENCY SPECIFYING DEVICE AND MEANDER CORRECTING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a technology capable of performing correction control with higher correction accuracy in a conveyance mechanism for conveying a conveyed body of a long belt shape.SOLUTION: A meander frequency specifying device is used with a conveyance mechanism 20 for conveying the conveyed body of a long belt shape in the longitudinal direction thereof from an upstream side to a downstream side in a conveyance passage. The meander frequency specifying device include: a tension difference detecting part 15 for detecting the tension difference S15 between both ends of the conveyed body in the width direction; a frequency characteristic acquiring part 16 for acquiring a frequency spectrum S16 of the tension difference S15; and a meander frequency specifying part 17 for acquiring the meander frequency S17 by comparing the frequency spectrum S16 and a threshold function. Thereby, the meander frequency of the conveyed body generated in the conveyance mechanism 20 can be specified, and correction control with higher correction accuracy can be performed in the conveyance mechanism 20.SELECTED DRAWING: Figure 3