| 摘要 |
<P>PROBLEM TO BE SOLVED: To reliably remove high frequency noise, and to optimize the low-pass filtering process according to the state of the high frequency noise. Ž<P>SOLUTION: A web meandering correction system includes: an edge detection means 2 that detects an edge position signal indicating the edge position in the width direction of a web; an HPF processing unit 3 that executes a high pass filtering process on the edge position signal detected by the edge detection means 2 using a predetermined lower limit frequency as a reference; a high frequency noise analyzing unit 4 that analyzes high frequency noise that has passed through the HPF processing unit 3; an LPF processing unit 5 that executes a low pass filtering process on the edge position signal detected by the edge detection means 2 using a predetermined upper limit frequency as a reference; a coefficient setting unit 6 that sets a coefficient for determining the characteristics of the low pass filtering process on the basis of a result of analysis by the high frequency noise analyzing unit 4; and a meandering correction unit 7 that corrects meandering of the web on the basis of information acquired by the LPF processing unit 5. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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