KR960024263A - Sheet deformation measuring method of steel sheet and apparatus - Google Patents

Sheet deformation measuring method of steel sheet and apparatus Download PDF

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Publication number
KR960024263A
KR960024263A KR1019940040267A KR19940040267A KR960024263A KR 960024263 A KR960024263 A KR 960024263A KR 1019940040267 A KR1019940040267 A KR 1019940040267A KR 19940040267 A KR19940040267 A KR 19940040267A KR 960024263 A KR960024263 A KR 960024263A
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South Korea
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deformation
steel sheet
measuring
sheet
point
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KR1019940040267A
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Korean (ko)
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KR0129054B1 (en
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황병원
손병준
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김만제
포항종합제철 주식회사
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • G01B11/16Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

본 발명은 압연중의 열간압연 강판이나 압연후 제품상태의 강판변형을 측정하는 방법 및 그 장치에 관한 것으로서, 강판의 전체진동과 부분적인 기울기의 변화에서 오는 오차를 배제하면서 강판전체의 변형분포를 구할 수 있을 뿐만 아니라 강판의 폭방향으로 주사된 레이져광을 카메라로 촬영할 때 끊어짐이 발생되지 않고 촬영시 상의 끌림이 발생되지 않게 함으로써 측정정도를 보다 향상시킬 수 있는 강판의 판변형 측정방법 및 그 장치을 제공하고자 하는데, 그 목적이 있다.The present invention relates to a method and apparatus for measuring the steel sheet deformation of a hot rolled steel sheet during rolling or a product state after rolling. The present invention relates to a deformation distribution of an entire steel sheet while excluding errors resulting from changes in overall vibration and partial slope of the steel sheet. In addition to measuring the sheet deformation of the steel sheet and its apparatus, it is possible to improve the accuracy of measurement by preventing the occurrence of breakage when the laser beam scanned in the width direction of the steel sheet is photographed by the camera, and the drag of the image. I want to provide it, and its purpose is.

본 발명은 이송룔상에서 이동하는 강판의 변형을 측정하기 위하여, 쉬트형태의 3선 레이져광을 경사지게 강판에 주사시켜, 주사각도와 레이져광의 이동량을 이용하여 강판의 변형을 측정하는 판변형 측정장치에 있어서, 상기 강판의 측정점 부근의 일정구간의 변형상태를 2차원 함수로 구하여, 휨량을 나타내는 2차항의 곡률계수를 강판 전체에 대하여 계산하고,상기 계산된 2차항의 곡률계수(a)와 강판의 진동과 기울기의 변화가 없다고 가정한 강판의 길이방향 세지점의 높이(Hi-1, Hi, Hi+1)와 간격(D)를 이용하여 하기식에 의해In order to measure the deformation of the steel sheet moving on the transfer beam, the sheet deformation measuring apparatus for scanning the sheet-shaped three-wire laser light inclined inclined, and measuring the deformation of the steel sheet using the scanning angle and the amount of laser light movement. In this case, the state of deformation of a certain section near the measuring point of the steel sheet is obtained by a two-dimensional function, the curvature coefficient of the secondary term representing the amount of warpage is calculated for the whole steel sheet, and the calculated curvature coefficient a of the secondary term and Using the height (H i-1 , H i , H i + 1 ) and the spacing (D) of the longitudinal three points of the steel plate, assuming that there is no change in vibration and tilt,

Hi+1=Hi-1-2Hi-2aD2 H i + 1 = H i-1 -2H i -2aD 2

강판의 변형을 구하는 강판의 변형측정방법 및 그 장치를 그 요지로 한다.The deformation | transformation measuring method of a steel plate which finds the deformation of a steel plate, and its apparatus are made into the summary.

Description

강판의 판 변형 측정방법 및 그 장치Sheet deformation measuring method of steel sheet and apparatus

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

제3도는 본 발명의 측정방법을 설명하기 위한 레이져 광의 주사방법과 표면형상에 따른 측정점의 변형높이를 나타내는 모식도, 제4도는 본 발명의 측정방법을 설명하기 위한 길이방향으로의 전체변형형상과 측정부위의 변형형상의 관계를 나타내는 모식도, 제5도는 본 발명의 강판의 판변형 측정장치의 구조도.3 is a schematic diagram showing the laser beam scanning method for explaining the measuring method of the present invention and the deformation height of the measuring point according to the surface shape, and FIG. The schematic diagram which shows the relationship of the deformation shape of a site | part, and FIG. 5 is a structural diagram of the sheet deformation measuring apparatus of the steel plate of this invention.

Claims (2)

쉬트형태의 3선 레이져광을 경사지게 강판에 주사하여 주사각도와 레이져광의 이동량을 이용함으로써 이송롤 상에서 이동하는 강판의 판 변형을 측정하는 방법에 있어서, 판에 주사된 레이져 주사각도와 변형이 없는 강판에 대한레이져광의 이동량을 측정하여 레이져가 주사된 강판상의 3측정점에서의 변형높이(h1', h2',h3')을 구하는 단계 : 상기와 같이 구한 3측정점에서의 변형높이 (h1', h2',h3')와 3측정점에 대한 강판의 길이방향의 거리(x1', x2',x3')를 이용하여 하기와 같은 2차 함수식을 구하는 단계 ;A method of measuring sheet deformation of a steel sheet moving on a feed roll by scanning a sheet-shaped three-wire laser beam obliquely onto the steel sheet and using the scanning angle and the amount of laser beam movement, wherein the steel sheet scanned without the laser scanning angle and deformation deformation height of 3 from the measuring points on the laser scanning plate by measuring the laser beam moving amount for obtaining a (h 1 ', h 2' , h 3 '): strain height at three measurement points obtained as described above (h 1 obtaining a quadratic function equation using ', h 2 ', h 3 ') and the longitudinal distance (x 1 ', x 2 ', x 3 ') of the steel sheet with respect to three measurement points; h(x)=ax2+bx+ch (x) = ax 2 + bx + c 상기 3측정점중의 중앙측정점을 원점으로 하고 이 원점에 대한 두 측정점의 레이져광사이의 거리(d1, d2)와 각 측정점의 변형높이(h1', h2',h3')를 이용하여 상기 2차함수중의 곡률계수(a)를 구하는 단계 ; 및 상기와 같이 구한 곡률계수(a)값, 측정점사이의 길이방향으로의 임의간격(D), 측정하고자 하는 지점으로부터 D 만큼 떨어진 지점의 변형높이(Hi), 및 측정하고자하는 지점으로부터 2D 만큼 떨어진 지점의 변형높이(i-1)를 이용하여 하기 식에 의해 변형높이를 계산하는 단계 ; 및The center measuring point among the three measuring points is the origin, and the distance (d 1 , d 2 ) between the laser light of the two measuring points with respect to this origin and the deformation height (h 1 ', h 2 ', h 3 ') of each measuring point Obtaining a curvature coefficient (a) in the quadratic function by using; And the value of the curvature coefficient (a) obtained as described above, the arbitrary distance (D) in the longitudinal direction between the measuring points, the deformation height (H i ) of the point separated by D from the point to be measured, and by 2D from the point to be measured. Calculating the deformation height by the following equation using the deformation height i-1 of the separated points; And Hi+1=Hi-1-2Hi-2aD2 H i + 1 = H i-1 -2H i -2aD 2 상기와 같은 단계를 반복하여 강판전체의 변형을 구하는 단계를 포함하여 구성되는 강판의 판변형 측정방법.Repeating the above steps to obtain the deformation of the whole steel sheet plate deformation measurement method comprising a. 쉬트 형태의 3선 레이져광을 경사지게 강판에 주사하여 주사각도와 레이져광의 이동량을 이용하므로서,이송롤상에서 이동하는 강판의 변형을 측정하는 장치에 있어서, 레이져광을 발생시키는 레이져발생기(1) ; 원주방향으로홀이 형성된 회전원판을 구비하여 상기 홀로 레이져 발생기에서 발생된 레이져광을 통과시키도록 형성된 쵸퍼(12) ; 상기쵸퍼를 통과한 레이져광을 한쪽방향으로 퍼뜨려서 쉬트형상의 빔으로 강판상에 주사하도록 구성된 광분할기(13) ; 강판상에 주사된 레이져광을 촬영하기 위한 CCD 카메라(14) ; 및 상기 CCD 카메라에 의해서 촬영된 레이져광 화상을 전송받아3측정점의 변형높이와 판길이 측정기(3)에서 측정된 3측정점에 대한 강판의 길이방향의 거리와의 2차함수식을 구하고,중앙측정점을 원점으로 하는 원점과 두측정점의 레이져광 사이의 거리와 각 측정점의 변형높이를 이용하여 2차함수식의곡률계수(a)를 구하고, 이와같이 구한 곡률계수(a), 측정점사이의 길이방향으로 임의 간격(D), 측정하고자 하는 지점으로부터 D 만큼 떨어진 지점의 변형높이(Hi), 및 측정하고자 하는 지점으로부터 2D만큼 떨어진 지점의 변형높이(i-1)를 이용하여 하기식에 의해An apparatus for measuring the deformation of a steel sheet moving on a feed roll by scanning a sheet-shaped three-wire laser beam at an inclined angle and using the scanning angle and the amount of laser light movement, the laser generator (1) generating laser light; A chopper (12) having a rotating disc with holes formed in the circumferential direction to pass the laser light generated by the laser generator; A light splitter (13) configured to spread the laser light that has passed through the chopper in one direction and scan it onto the steel sheet with a sheet-shaped beam; A CCD camera 14 for photographing laser light scanned on a steel sheet; And receiving a laser light image photographed by the CCD camera to obtain a quadratic function equation between the deformation height of the three measuring points and the distance in the longitudinal direction of the steel sheet with respect to the three measuring points measured by the plate length measuring instrument (3). The curvature coefficient (a) of the quadratic function is obtained by using the distance between the origin point of origin and the laser light of the two measurement points and the deformation height of each measurement point, and the curvature coefficient (a) obtained as described above and an arbitrary interval in the longitudinal direction between the measurement points. (D) using the deformation height (H i ) of the point away from the point to be measured by D, and the deformation height ( i-1 ) of the point 2D away from the point to be measured by Hi+1=Hi-1-2Hi-2aD2 H i + 1 = H i-1 -2H i -2aD 2 변형높이를 계산하여 강판의 전체변형을 구하는 컴퓨터(15)를 포함하여 구성되는 강판의 판 변형측정장치.An apparatus for measuring sheet deformation of a steel sheet, comprising a computer (15) for calculating a deformation height to obtain a total deformation of the steel sheet. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940040267A 1994-12-31 1994-12-31 Measuring method and apparatus for plate transformation of steel plate KR0129054B1 (en)

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KR0129054B1 KR0129054B1 (en) 1998-04-07

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100473682B1 (en) * 2000-09-04 2005-03-07 주식회사 포스코 Variously formed slab width measuring apparatus and its method
KR100711408B1 (en) * 2005-12-24 2007-04-30 주식회사 포스코 Device for on-line measuring width of strip
KR101148903B1 (en) * 2010-10-27 2012-05-29 현대제철 주식회사 Method for measuring thickness of rolling plate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100473682B1 (en) * 2000-09-04 2005-03-07 주식회사 포스코 Variously formed slab width measuring apparatus and its method
KR100711408B1 (en) * 2005-12-24 2007-04-30 주식회사 포스코 Device for on-line measuring width of strip
KR101148903B1 (en) * 2010-10-27 2012-05-29 현대제철 주식회사 Method for measuring thickness of rolling plate

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