US 12,358,081 B2
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
Hiroaki Ono, Tokyo (JP); Shuichi Sato, Tokyo (JP); and Mitsutoshi Kemmochi, Tokyo (JP)
Assigned to JFE STEEL CORPORATION, Tokyo (JP)
Appl. No. 18/037,178
Filed by JFE STEEL CORPORATION, Tokyo (JP)
PCT Filed Sep. 8, 2021, PCT No. PCT/JP2021/033008
§ 371(c)(1), (2) Date May 16, 2023,
PCT Pub. No. WO2022/118515, PCT Pub. Date Jun. 9, 2022.
Claims priority of application No. 2020-201226 (JP), filed on Dec. 3, 2020.
Prior Publication US 2024/0017358 A1, Jan. 18, 2024
Int. Cl. B23K 31/02 (2006.01); B21C 37/08 (2006.01); B23K 31/12 (2006.01); B23K 101/06 (2006.01); B23K 103/04 (2006.01)
CPC B23K 31/027 (2013.01) [B21C 37/0811 (2013.01); B23K 31/125 (2013.01); B23K 2101/06 (2018.08); B23K 2103/04 (2018.08)] 10 Claims
OG exemplary drawing
 
1. A position detection apparatus for a seam portion and a heating portion of a welded steel pipe, the position detection apparatus detecting a position of the seam portion of the welded steel pipe and a position of the heating portion generated by heating the seam portion and/or a vicinity of the seam portion, the position detection apparatus comprising:
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 a reflection image of the seam portion and a radiation image of the heating portion irradiated with the light by the light source; and
an image processing unit configured to process the reflection image and the radiation 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,
the reflection image of the seam portion and the radiation image of the heating portion are in a state of being coaxially optically aligned when captured by the imaging unit, and
the reflection image of the seam portion and the radiation image of the heating portion are separated according to the first channel and the second channel, respectively.