Title:
ROUND STEEL MATERIAL MARKING DETECTION DEVICE AND DETECTION METHOD, AND METHOD FOR MANUFACTURING STEEL MATERIAL
Document Type and Number:
WIPO Patent Application WO/2020/111247
Kind Code:
A1
Abstract:
Provided are a round steel material marking detection device and detection method, and a method for manufacturing a steel material, with which the risk of a marking being missed is significantly reduced by detecting markings automatically. A round steel material marking detection device (1) detects a marking (M) that has been applied at the position of a surface flaw on a round steel material (S). The marking detection device (1) is provided with: an image capturing device (3) which captures images of a prescribed position (P) in the circumferential direction on the surface of the round steel material (S), which is rotating in a circumferential direction, with a prescribed period and with a resolution smaller than the dimension of the marking (M) being a measurement target; an image processing unit (8) which processes an image obtained by joining, in the circumferential direction, the images of the prescribed position (P) captured by the image capturing device (3); and a marking extraction unit (9) which extracts the marking (M) from the image that has been subjected to image processing by the image processing unit (8).
Inventors:
TANAKA YUTO (JP)
SATO KYOSUKE (JP)
MATSUMOTO MINORU (JP)
TANAKA MIKIO (JP)
SATO KYOSUKE (JP)
MATSUMOTO MINORU (JP)
TANAKA MIKIO (JP)
Application Number:
PCT/JP2019/046841
Publication Date:
June 04, 2020
Filing Date:
November 29, 2019
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21C51/00; B21B38/00; G01B11/00
Foreign References:
JPS5415590A | 1979-02-05 | |||
JP2002039948A | 2002-02-06 | |||
JPH07237106A | 1995-09-12 | |||
JP2017146302A | 2017-08-24 | |||
KR20050063459A | 2005-06-28 |
Attorney, Agent or Firm:
TANAKA Hidetetsu et al. (JP)
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