Steel plate meandering amount measuring device, steel sheet meandering amount measuring method, hot-rolled steel strip hot rolling equipment, and hot-rolled steel strip hot-rolling method

摘要

Provided are a steel sheet meandering amount measuring device, a meandering amount measuring method, a hot rolling facility, and a hot rolling method capable of accurately measuring the meandering amount of a steel sheet during rolling. The meandering amount calculation device (6) of the meandering amount measuring device (4) has a drive side edge point z ds (N) and a work side edge point z ws (N) at the current time in the measurement reliability determination unit (64). When it is determined that both are highly reliable, the meandering amount of the steel plate (10) is calculated using the drive side edge portion z ds (N) and the work side edge portion z ws (N) at the current time. If only one of the drive side edge location z ds (N) and the work side edge location z ws (N) at the current time is determined to be highly reliable, the drive side edge location z ds at the current time with high reliability ( N) or the work side edge portion z ws (N) is used as a reference, and the other edge portion is interpolated using the number of pixels W from the plate width update unit (65).