KR970033156A - Real-time measuring device and method of bending degree of tip of thick plate during hot rolling - Google Patents

Real-time measuring device and method of bending degree of tip of thick plate during hot rolling Download PDF

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Publication number
KR970033156A
KR970033156A KR1019950046811A KR19950046811A KR970033156A KR 970033156 A KR970033156 A KR 970033156A KR 1019950046811 A KR1019950046811 A KR 1019950046811A KR 19950046811 A KR19950046811 A KR 19950046811A KR 970033156 A KR970033156 A KR 970033156A
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South Korea
Prior art keywords
image
thick plate
data
tip
curvature
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KR1019950046811A
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Korean (ko)
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KR0169582B1 (en
Inventor
정홍
김중구
황상무
천명식
Original Assignee
김종진
포항종합제철주식회사
신창식
재단법인 산업과학기술연구소
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Priority to KR1019950046811A priority Critical patent/KR0169582B1/en
Publication of KR970033156A publication Critical patent/KR970033156A/en
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    • 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
    • B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2263/00—Shape of product
    • B21B2263/04—Flatness

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

본 발명은 후판 열간 압연에서의 선단부 휨정도 측정장치 및 방법에 관한 것으로, 후판의 영상을 정확하게 검출하고, 후판의 열간 압연시 후판의 곡률을 자동으로 측정하기 위하여, 압연기로부터 소정거리 떨어져 후판의 영상을 검출하는 영상 카메라수단과, 상기 영상 카메라수단으로부터 영상신호를 받아 디지탈 데이타로 변환하는 영상 회득수단과, 상기 영상 획득수단으로부터 영상 데이타를 받아 저장하는 버퍼 메모리수단과, 상기 영상 획득 수단으로 부터 영상 데이타를 받아 윤곽선 검출기로 윤곽을 검출하여BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for measuring the tip bending degree in hot rolling of a thick plate. Image acquisition means for detecting a video signal; image acquisition means for receiving an image signal from the image camera means; converting the image signal into digital data; buffer memory means for receiving and storing image data from the image acquisition means; and image from the image acquisition means. Take the data and detect the contour with the contour detector

으로부터 최소 자승법에 의해 중심(a,b) 및 반경 R을 구하여 곡률을 산출하고 그 곡률에 따라 압연 롤을 제어하는 제어신호를 출력하는 제어수단과, 상기 제어수단으로부터 영상 데이타를 받아 그 영상을 표시하는 모니터 수단을 구비한다.Control means for calculating the curvature by calculating the center (a, b) and the radius R by the least square method from the control unit and outputting a control signal for controlling the rolling roll according to the curvature, and receiving the image data from the control means and displaying the image. And monitoring means.

Description

열간압연시 후판의 선단부 휨정도 실시간 측정장치 및 방법Real-time measuring device and method of bending degree of tip of thick plate during hot rolling

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 후판 열간 압연시 발생하는 후판 선단부의 휨정도를 보이는 상태도이다.1 is a state diagram showing the degree of warpage of the tip portion of the thick plate generated during hot rolling of the thick plate.

제2도는 본 발명에 의한 측정장치의 구성을 보이는 블록도이다.2 is a block diagram showing the configuration of the measuring apparatus according to the present invention.

제3도는 본 발명에 적용되는 영상카메라 수단의 구조도이다.3 is a structural diagram of an image camera means applied to the present invention.

제4도는 본 발명에 의한 소프트웨어의 구성도이다.4 is a configuration diagram of the software according to the present invention.

제5도는 본 발명에 의한 후판 검출 방법을 보이는 설명도이다.5 is an explanatory diagram showing a thick plate detection method according to the present invention.

제6도는 본 발명에 적용되는 윤곽선 검출기의 구성을 보이는 블럭도이다.6 is a block diagram showing the configuration of the contour detector applied to the present invention.

제7도는 본 발명에 따른 후판 검출과정을 보이는 설명도이다.7 is an explanatory diagram showing a heavy plate detection process according to the present invention.

Claims (5)

후판 열간 압연 공정중 후판의 선단의 휨 정도를 측정하는 장치에 있어서, 압연기로부터 소정거리 떨어져 후판의 영상을 검출하는 영상 카메라수단(10)과, 상기 영상 카메라수단(10)으로부터 영상신호를 받아 디지탈 데이타로 변환하는 영상 획득수단(20)과, 상기 영상 획득수단(20)으로부터 영상 데이타를 받아 저장하는 버퍼 메모리수단(60)과, 상기 영상 획득 수단으로부터 영상 데이타를 받아 윤곽선 검출기로 윤곽을 검출하여A device for measuring the degree of warpage of the tip of a thick plate during a hot plate hot rolling process, comprising: a video camera means (10) for detecting an image of a thick plate a predetermined distance away from a rolling mill, and receiving a video signal from the video camera means (10). Image acquisition means 20 for converting the data, buffer memory means 60 for receiving and storing the image data from the image acquisition means 20, and receiving the image data from the image acquisition means and detecting contours with an outline detector. 으로부터 최소자승법에 의해 중심(a,b) 및 반경 R을 구하여 곡률을 산출하고 그 곡률에 따라 압연 롤을 제어하는 제어신호를 출력하는 제어수단(30)과, 상기 제어수단(30)으로부터 영상 데이타를 받아 그 영상을 표시하는 모니터 수단(50)을 구비하는 것을 특징으로 하는 열간 압연시 후판의 선단부 휨정도 실시간 측정장치.Control means (30) for calculating the curvature by calculating the center (a, b) and the radius R by the least square method from the control unit and outputting a control signal for controlling the rolling roll according to the curvature, and image data from the control means (30). And a monitor means (50) for receiving the image and displaying the image. 제1항에 있어서, 상기 영상 카메라 수단은 후판에서 발생하는 적외선만을 통과시켜 배경과 후판을 구부되게하는 적외선 필터(11)와, 상기 적외선 필터(11)을 통과하는 후판의 영상을 CCD카메라(13)의 촬상면에 맞추는 줌렌즈(12)와, 상기 줌 렌즈(12)에 의해 후판의 영상을 받아 전기적 영상신호로 변환하는 CCD카메라(13)로 구성되는 것을 특징으로 하는 열간 압연시 후판의 선단부 휨정도 실시간 측정 장치.The CCD camera 13 according to claim 1, wherein the image camera means transmits an infrared filter (11) through which only the infrared rays generated from the thick plate pass and bends the background and the thick plate, and an image of the thick plate passing through the infrared filter (11). A zoom lens 12 adapted to the image pickup surface of the c) and a CCD camera 13 which receives the image of the thick plate by the zoom lens 12 and converts the image into an electrical image signal. Real time measuring device. 제1항에 있어서, 상기 윤곽 검출기는 칼만필터(Kalman Filter)와 에지 추정기(edge predictor)로 구성되는 것을 특징으로 하는 열간 압연시 후판의 선단부 휨정도 실시간 측정 장치.The apparatus of claim 1, wherein the contour detector comprises a Kalman filter and an edge predictor. 후판 열간 압연 공정중 후판의 선단의 휨 정도를 측정하는 방법에 있어서, 영상 획득 수단으로부터 영상 데이타를 받아 칼만필터와 지연부 및 에지추정기로 구성된 윤곽선 검출기로 윤곽을 검출하여In the method of measuring the bending degree of the tip of the thick plate during the hot plate rolling process, the image data is received from the image acquisition means and the contour is detected by a contour detector composed of a Kalman filter, a delay unit and an edge estimator. 으로부터 최소자승법에 의해 중심(a,b) 및 반경 R을 구하여 곡률을 산출하는 것을 특징으로 하는 열간 압연시 후판의 선단부 휨정도 실시간 측정 방법.A method for measuring the bending degree of the tip of a thick plate at the time of hot rolling, wherein the curvature is calculated by calculating the center (a, b) and the radius R by the least square method. 열간 압연시 후판의 선단부 휨정도 실시간 측정방법에 있어서, 영상 카메라 수단으로 후판의 영상을 촬영하여 프레임 버퍼에 저장하는 단계와, 상기 프레임 버퍼에 저장된 후판의 영상 데이타를 읽어 후판이 상기 영상 카메라 수단의 시야에 들어왔는지를 검색하고 상기 후판이 상기 영상 카메라 수단의 시야에 들어올 때까지 상기 프레임 버퍼의 데이타를 읽어 반복하는 단계와, 상기 후판의 윤곽을 검출하여 윤곽 데이타로부터 칼만필터와 에지추정기로 구성된 윤곽 검출기를 이용하여 윤곽선을 검출하는 단게와, 상기 검출된 윤곽선을 커브피팅하여 곡률을 계산하는 단계와, 상기 산출된 곡률 데이타, 최대 및 최소 높이 데이타를 표시하는 단계를 구비하는 것을 특징으로 하는 열간 압연시 후판의 선단부 휨정도 실시간 측정방법.In the real-time measuring method of the bending degree of the tip of the thick plate during hot rolling, taking a video of the thick plate with an image camera means and storing it in the frame buffer, and reading the image data of the thick plate stored in the frame buffer Retrieving whether it is in the field of view and reading and repeating the data of the frame buffer until the plate is in the field of view of the image camera means; detecting the outline of the plate and forming an outline of Kalman filter and edge estimator from the outline data. Detecting a contour using a detector, calculating a curvature by curve fitting the detected contour, and displaying the calculated curvature data and maximum and minimum height data. Real-time measuring method of tip deflection of heavy plates ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950046811A 1995-12-05 1995-12-05 Real-tmie measurement equipment and method for degree of bending at the front of thick plate during hot rolling KR0169582B1 (en)

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KR1019950046811A KR0169582B1 (en) 1995-12-05 1995-12-05 Real-tmie measurement equipment and method for degree of bending at the front of thick plate during hot rolling

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KR1019950046811A KR0169582B1 (en) 1995-12-05 1995-12-05 Real-tmie measurement equipment and method for degree of bending at the front of thick plate during hot rolling

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KR0169582B1 KR0169582B1 (en) 1999-01-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030053386A (en) * 2001-12-22 2003-06-28 재단법인 포항산업과학연구원 Method for measuring a precision of size using a CCD camera
KR20030083969A (en) * 2002-04-24 2003-11-01 주식회사 다진시스템 The system and method for measuring the warp of a hot-rolled Sheets using the vision system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000043433A (en) * 1998-12-29 2000-07-15 이구택 Method and device for measuring curvature of sheet in online using one-dimensional charge coupled device
KR100530462B1 (en) * 1999-12-08 2005-11-23 주식회사 포스코 Device and its method for on-line measurement of bar warp using CCD camera in roughing mill
KR100622341B1 (en) * 2006-02-10 2006-09-19 주식회사 영국전자 Falling slab prevention system useing monitoring method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030053386A (en) * 2001-12-22 2003-06-28 재단법인 포항산업과학연구원 Method for measuring a precision of size using a CCD camera
KR20030083969A (en) * 2002-04-24 2003-11-01 주식회사 다진시스템 The system and method for measuring the warp of a hot-rolled Sheets using the vision system

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