| 摘要 |
PROBLEM TO BE SOLVED: To provide a thickness controlling method for sheetlike matter, capable of quickly realizing a desired TD thickness profile by controlling the thickness of the sheetlike matter based on TD thickness data obtained by removing in order the noise components in the MID thickness variation from the scanning date in the width direction of the total thickness. SOLUTION: The thickness controlling method for the sheetlike matter includes: detecting a peak frequency resulting from the MD thickness variation by subjecting the TD thickness data of the sheetlike matter measured with an online thickness meter to Fourier transform; removing the data in the peak frequency range having an intense exceeding a preset threshold value; processing the data having a partial frequency range removed to the TD thickness data by subjecting the data having the partial frequency range removed to the Fourier transform; and using the processed data for the calculation of the thickness control. COPYRIGHT: (C)2009,JPO&INPIT |
