WEB MEANDERING CORRECTION SYSTEM AND WEB MEANDERING CORRECTION METHOD

摘要

A web meandering correction system (1) includes: an edge detector (2) that detects an edge position signal of a web; an HPF processing unit (3) that executes a high-pass filtering process on the edge position signal 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 using a predetermined upper limit frequency as a reference; a coefficient setting unit (6) that sets a coefficient that determines 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).