JPS5546161A - Detection method for flaw on surface of steel material - Google Patents

Detection method for flaw on surface of steel material

Info

Publication number
JPS5546161A
JPS5546161A JP11979878A JP11979878A JPS5546161A JP S5546161 A JPS5546161 A JP S5546161A JP 11979878 A JP11979878 A JP 11979878A JP 11979878 A JP11979878 A JP 11979878A JP S5546161 A JPS5546161 A JP S5546161A
Authority
JP
Japan
Prior art keywords
flaw
steel material
detect
output
camera
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11979878A
Other languages
Japanese (ja)
Inventor
Takeshi Kitagawa
Akira Fujii
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP11979878A priority Critical patent/JPS5546161A/en
Publication of JPS5546161A publication Critical patent/JPS5546161A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product

Landscapes

  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

PURPOSE: To enable to detect flaw signal with high accuracy, by using ITV camera and processing the condition of inspected object in real time.
CONSTITUTION: A plurality of ITV cameras 4 are placed vertically toward the progressing direction A of the inspcted object 1 of hot steel material to detect the surface flaw under running. Further, output of each head Di (i=1, 2,..., n) of each camera 4 is fed to the individual signal processing circuit 5, and after rejecting noise, it is sampled with a given equal distance lengthwise the steel material 1 and converted into digital signal, and the output is discriminated at the information processor 6 including the computer for the propriety of flaw repair at each section.
COPYRIGHT: (C)1980,JPO&Japio
JP11979878A 1978-09-28 1978-09-28 Detection method for flaw on surface of steel material Pending JPS5546161A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11979878A JPS5546161A (en) 1978-09-28 1978-09-28 Detection method for flaw on surface of steel material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11979878A JPS5546161A (en) 1978-09-28 1978-09-28 Detection method for flaw on surface of steel material

Publications (1)

Publication Number Publication Date
JPS5546161A true JPS5546161A (en) 1980-03-31

Family

ID=14770481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11979878A Pending JPS5546161A (en) 1978-09-28 1978-09-28 Detection method for flaw on surface of steel material

Country Status (1)

Country Link
JP (1) JPS5546161A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58158923A (en) * 1982-03-16 1983-09-21 Dainippon Printing Co Ltd Common defect detecting method of regular pattern
JPH01250848A (en) * 1988-03-31 1989-10-05 Nireco Corp Fine edge crack detecting device and its data display method
JPH01179246U (en) * 1988-06-09 1989-12-22
JPH03500092A (en) * 1988-09-16 1991-01-10 オーエンス‐イリノイ・グラス・コンテナー・インコーポレーテツド Inspection of container mouth
JPH0466225A (en) * 1990-07-06 1992-03-02 Godo Seitetsu Kk Method and device for inspecting surface fault of hot rolling billet
JPH04332855A (en) * 1991-05-07 1992-11-19 Nippon Steel Corp Inspecting apparatus of surface defect of steel plate
WO2023188556A1 (en) * 2022-03-30 2023-10-05 Ｊｆｅスチール株式会社 Steel bar surface flaw evaluation method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58158923A (en) * 1982-03-16 1983-09-21 Dainippon Printing Co Ltd Common defect detecting method of regular pattern
JPH0115001B2 (en) * 1982-03-16 1989-03-15 Dainippon Printing Co Ltd
JPH01250848A (en) * 1988-03-31 1989-10-05 Nireco Corp Fine edge crack detecting device and its data display method
JPH01179246U (en) * 1988-06-09 1989-12-22
JPH03500092A (en) * 1988-09-16 1991-01-10 オーエンス‐イリノイ・グラス・コンテナー・インコーポレーテツド Inspection of container mouth
JPH0466225A (en) * 1990-07-06 1992-03-02 Godo Seitetsu Kk Method and device for inspecting surface fault of hot rolling billet
JPH04332855A (en) * 1991-05-07 1992-11-19 Nippon Steel Corp Inspecting apparatus of surface defect of steel plate
WO2023188556A1 (en) * 2022-03-30 2023-10-05 Ｊｆｅスチール株式会社 Steel bar surface flaw evaluation method

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