Jfe Steel Corporation

Mitsutoshi Kemmochi

Hiroaki Ono

Shuichi Sato

Yukihiro Matsubara

Tomoyoshi Ogasahara

Hiroto Goto

Hideto Yamaguchi

A meandering amount arithmetically operating device of a meandering amount measurement device calculates the meandering amount of a steel sheet using a drive side edge site z(N) and a work side edge sites z(N) at a current time when a measurement reliability determination unit determines that both the drive side edge site z(N) and the work side edge sites z(N) at the current time have high reliability. When only one of the drive side edge site z(N) and the work side edge site z(N) at the current time is determined to have high reliability, the other edge site is calculated by interpolation using the number of pixels W from a sheet width updating unit with the drive side edge sites z(N) or the work side edge site z(N) at the current time having high reliability as a reference.

Steel-sheet meandering amount measurement device, steel-sheet meandering amount measurement method, hot-rolling equipment for hot-rolled steel strip, and hot-rolling method of hot-rolled steel strip

A position detection apparatus for a seam portion and a heating portion of a welded steel pipe, the position detection apparatus includes: a light source configured to irradiate the seam portion and the heating portion with light in a first wavelength range; an imaging unit having a plurality of different channels and configured to capture an image of each of the seam portion and the heating portion irradiated with the light by the light source; and an image processing unit configured to process the image captured by the imaging unit and to detect the position of each of the seam portion and the heating portion, wherein the imaging unit includes: a first channel capable of receiving the light in the first wavelength range; and a second channel capable of receiving light in a second wavelength range corresponding to radiation light from the heating portion.

Position detection apparatus for seam portion and heating portion of welded steel pipe, manufacturing equipment for welded steel pipe, position detection method for seam portion and heating portion of welded steel pipe, manufacturing method for welded steel pipe, and quality control method for welded steel pipe

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Tokyo, Japan

Mitsutoshi Kemmochi