KR100415921B1 - Method for measuring width of slab - Google Patents

Method for measuring width of slab Download PDF

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Publication number
KR100415921B1
KR100415921B1 KR1019980009344A KR19980009344A KR100415921B1 KR 100415921 B1 KR100415921 B1 KR 100415921B1 KR 1019980009344 A KR1019980009344 A KR 1019980009344A KR 19980009344 A KR19980009344 A KR 19980009344A KR 100415921 B1 KR100415921 B1 KR 100415921B1
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South Korea
Prior art keywords
slab
distance
width
measuring sensors
distance measuring
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KR1019980009344A
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Korean (ko)
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KR19990075260A (en
Inventor
김정
김승묵
구기회
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주식회사 포스코
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Priority to KR1019980009344A priority Critical patent/KR100415921B1/en
Publication of KR19990075260A publication Critical patent/KR19990075260A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/04—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
    • G01B7/048—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring width
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/026—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring distance between sensor and object
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/04—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
    • G01B11/046—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring width

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

PURPOSE: A width measuring method of a slab is provided to improve the quality and to increase the productivity of the slab by measuring the width of the slab entering a furnace accurately regardless of meandering or scale with three triangular distance measuring sensors. CONSTITUTION: Distance measuring sensors(1,2,3) are installed at both sides of a slab(9) moving into a heating furnace of hot rolling process, and formed of the right-angled triangle. A central processing unit(12) receives measured values from the distance measuring sensors, and transmits the calculated value to a monitor(13) by calculating the actual breadth of the slab. Three distance measuring sensors are placed as the apex of the right-angled triangle around the slab moving into the heating furnace along a roller table(10). The distance between the first and second measuring sensors is fixed, and the distance between the first and second measuring sensors and both sides of the slab is varied.

Description

슬라브의 폭측정방법How to measure the width of the slab

본 발명은 슬라브(Slab)의 폭측정방법에 관한 것으로, 특히 열연설비의 가열로에 진입하는 슬라브의 폭을 스케일부착이나 사행에 관계없이 직각삼각형을 이루는 3개의 거리측정센서를 이용하여 정확하게 측정할 수 있는 슬라브(Slab)의 폭측정방법에 관한 것이다.The present invention relates to a method for measuring the width of a slab, and in particular, to measure the width of a slab entering a heating furnace of a hot rolling facility by using three distance measuring sensors that form a right triangle regardless of scale attachment or meandering. The present invention relates to a method for measuring the width of slab.

일반적으로 슬라브는 연속주조기에서 고체상태로 만들어져서 열연공정의 조압연과 사상압연을 거치면서 스트립으로 만들어지게 된다.In general, the slab is made in a solid state in a continuous casting machine and made into a strip through rough rolling and finishing rolling in the hot rolling process.

이때, 연속주조기에서 가열로에 장입되는 슬라브는 압연 전에 정확한 실폭이 측정되어야 하고, 이로써 조압연에서 폭압연시 자동폭제어가 가능하게 되고 압연 후 슬라브의 전후단의 폭변동요인을 규명할 수 있게 된다.At this time, the slab charged to the heating furnace in the continuous casting machine should be measured the exact actual width before rolling, thereby enabling automatic width control at the time of rolling in rough rolling and to identify the width fluctuation factor of the front and rear ends of the slab after rolling. .

한편, 종래 슬라브의 폭측정방법은 CCD(Charge Coupled Device)소자를 이용한 고감도 이미지(Image)센서를 이용하여 슬라브의 폭가장자리를 읽어들이고, 중앙메모리의 연산장치에서 슬라브의 폭값을 계산하였다.Meanwhile, in the conventional slab width measuring method, the width edge of the slab is read using a high sensitivity image sensor using a charge coupled device (CCD) device, and the width value of the slab is calculated by a calculation device of the central memory.

이와같은 종래의 슬라브 폭측정방법은 슬라브의 상면에 부착되어 있는 스케일층에 의해 폭측정값에 오차가 발생되고, 조압연에서 폭압연시 자동폭제어에 의한 폭보상 적정제어가 불가능하게 되고 압연 후 슬라브의 전후단의 폭변동 요인의 원인을 규명할 수 없게 된다.In the conventional slab width measurement method, an error occurs in the width measurement value due to the scale layer attached to the upper surface of the slab, and it is impossible to properly control the width compensation by automatic width control during rolling in rough rolling. It is not possible to identify the cause of the fluctuation factor in the front and rear of.

또한, 2개의 거리측정계를 이용한 종래의 슬라브 폭측정방법은 슬라브 사행시 오차가 발생되는 문제점이 있다.In addition, the conventional slab width measuring method using two range finders has a problem that an error occurs when slab meandering.

본 발명은 열연설비의 가열로에 진입하는 슬라브의 폭을 스케일부착이나 사행에 관계없이 직각삼각형을 이루는 3개의 거리측정센서를 이용하여 정확하게 측정함으로써 슬라브의 생산성 및 품질을 향상시킬 수 있는 슬라브(Slab)의 폭측정방법을 제공함에 그 목적이 있다.The present invention is to accurately measure the width of the slab entering the heating furnace of the hot-rolled equipment using three distance measuring sensors forming a right triangle, regardless of the scale attached or meandering slab (Slab) that can improve the slab productivity and quality Its purpose is to provide a width measurement method of

도1은 본 발명을 설명하기 위한 슬라브의 폭측정설비를 나타내는 사시도,1 is a perspective view showing a width measuring device of the slab for explaining the present invention,

도2는 슬라브의 정상이송시 본 발명에 따른 슬라브의 폭측정방법을 나타내는 평면도,Figure 2 is a plan view showing a slab width measuring method according to the present invention during the normal transport of the slab;

도3은 슬라브의 사행시 본 발명에 따른 슬라브의 폭측정방법을 나타내는 평면도이다.Figure 3 is a plan view showing a slab width measuring method according to the invention when the slab meandering.

＜도면의 주요부분에 대한 부호의 설명＞<Description of the code | symbol about the principal part of drawing>

1,2,3: 거리측정센서 9: 슬라브 10: 롤러테이블 12: 중앙연산부 13: 모니터1,2,3: Distance measuring sensor 9: Slab 10: Roller table 12: Central calculation unit 13: Monitor

상기한 목적을 달성하기 위하여 본 발명은 열연공정의 가열로로 진입되는 슬라브의 양측에 거리측정센서가 서로 직각삼각형을 이루도록 설치하는 과정과; 중앙연산부가 상기 거리측정센서의 각 측정값을 전송받아 상기 슬라브의 실폭을 하기한 식(4)의 실폭계산식에 의해 산출한 후 모니터로 전송하는 과정으로 이루어지는 것을 특징으로 하는 슬라브의 폭측정방법을 제공한다.In order to achieve the above object, the present invention comprises the steps of installing the distance measuring sensor to form a right triangle with each other on both sides of the slab entering the heating furnace of the hot rolling process; The central calculation unit receives the respective measured values of the distance measuring sensor and calculates the actual width of the slab by calculating the width of the equation according to the following equation (4), the width of the slab width measuring method comprising the step of transmitting to the monitor to provide.

도면을 참조하여 본 발명을 설명한다.The present invention will be described with reference to the drawings.

도1은 본 발명을 설명하기 위한 슬라브의 폭측정설비를 나타내는 사시도이고, 도2는 슬라브의 정상이송시 본 발명에 따른 슬라브의 폭측정방법을 나타내는 평면도이며, 도3은 슬라브의 사행시 본 발명에 따른 슬라브의 폭측정방법을 나타내는 평면도이다.Figure 1 is a perspective view showing the width measuring equipment of the slab for explaining the present invention, Figure 2 is a plan view showing a width measuring method of the slab according to the present invention during the normal transport of the slab, Figure 3 is a present invention when the slab meandering It is a top view which shows the width measuring method of the slab.

본 발명에서는 롤러테이블(10)을 따라 가열로에 진입되는 슬라브(9)를 중간에 두고 3개의 거리측정센서(1,2,3)가 직각삼각형의 꼭지점을 이루도록 설치되어 있고, 이 거리측정센서는 슬라브의 폭측정시 스케일이 부착되지 않는 슬라브의 측면을 기준하여 측정하게 된다.In the present invention, three distance measuring sensors (1, 2, 3) are installed to form a vertex of a right triangle with the slab (9) entering the heating furnace along the roller table (10) in the middle. When measuring the width of the slab is measured based on the side of the slab is not attached to the scale.

이때, 거리측정센서(1,2)의 거리는 고정값 D0를 갖도록 서로 이격 설치되고, 거리측정센서(1,2)와 슬라브(9)의 양측면 사이의 거리는 각각 D1, D2의 변수값을 갖게 된다.At this time, the distance of the distance measuring sensors (1, 2) are spaced apart from each other to have a fixed value D0, the distance between the distance measuring sensors (1, 2) and both sides of the slab (9) will have a variable value of D1, D2, respectively. .

따라서, 거리측정센서(1,2) 사이를 통과하는 슬라브(9)의 폭(W=W')은 다음과 같이 계산할 수 있다.Therefore, the width W = W 'of the slab 9 passing between the distance measuring sensors 1 and 2 can be calculated as follows.

그러나, 상기 (1)식에서 구해지는 슬라브(9)의 폭길이는 슬라브의 진행이 사행되지 않을 경우를 가정한 것이고, 슬라브가 θ각으로 사행될 경우 상기 (1)식에서 구해지는 슬라브 폭값(W´)과 슬라브의 실폭값(W)은 불일치하게 된다.However, the width length of the slab 9 obtained in the above formula (1) assumes that the slab is not meandered, and the slab width value W ′ obtained in the above formula (1) when the slab meanders at an angle θ. ) And the slab width (W) are inconsistent.

여기서, 거리측정센서(1,3)의 거리를 L이라 하고, 거리측정센서(3)로 부터 슬라브(9)의 측면까지의 거리를 D3라 하면 tanθ는 다음과 같이 구할 수 있다.Here, if the distance between the distance measuring sensors 1 and 3 is L and the distance from the distance measuring sensor 3 to the side surface of the slab 9 is D3, tan θ can be obtained as follows.

그리고, 상기 (1)과 (2)식으로 부터 슬라브(9)의 실폭값(W)을 구할 수 있다.And the actual width value W of the slab 9 can be calculated | required from said Formula (1) and (2).

즉, In other words,

이때, 상기 식(1),(2),(3)를 통합하여 하나의 식으로 표현하면 다음과 같이 식(4)로 나타낼 수 있게 된다.In this case, when the expressions (1), (2), and (3) are integrated and expressed as one expression, the expressions (4) can be expressed as follows.

한편, 중앙연산장치(12)에는 상기 식(1),(2),(3) 또는 식(4)가 입력되어 있고, 거리감지센서(1,2,3)으로 부터 각 측정값을 전송받아 슬라브(9)의 실폭(W)을 연산하게 된다.On the other hand, the formula (1), (2), (3) or (4) is input to the central computing device 12, and receives each measurement value from the distance sensor (1, 2, 3) The actual width W of the slab 9 is calculated.

그리고, 중앙연산부(12)에서 산출된 슬라브(9)의 실폭값(W)은 모니터(13)에 전송되어 디스플레이되고, 후공정인 조압연공정에서 슬라브의 자동폭제어에 활용하게 된다.In addition, the actual width value W of the slab 9 calculated by the central calculation unit 12 is transmitted to the monitor 13 and displayed, and is utilized for automatic width control of the slab in the rough rolling process, which is a later process.

본 발명은 열연설비의 가열로에 진입하는 슬라브의 폭을 스케일부착이나 사행에 관계없이 직각삼각형을 이루는 3개의 거리측정센서를 이용하여 정확하게 측정함으로써 슬라브의 생산성 및 품질을 향상시킬 수 있는 효과를 제공한다.The present invention provides an effect of improving the productivity and quality of the slab by accurately measuring the width of the slab entering the heating furnace of the hot-rolling equipment using three distance measuring sensors forming a right triangle, regardless of the scale attached or meandering. do.

Claims (1)

열연공정의 가열로로 진입되는 슬라브(9)의 양측에 거리측정센서(1,2,3)가 서로 직각삼각형을 이루도록 설치하는 과정과;Installing the distance measuring sensors (1, 2, 3) to form a right triangle on each side of the slab (9) entering the heating furnace of the hot rolling process; 중앙연산부(12)가 상기 거리측정센서(1,2,3)의 각 측정값을 전송받아 상기 슬라브(9)의 실폭(W)을 하기한 실폭계산식에 의해 산출한 후 모니터(13)로 전송하는 과정으로 이루어지는 것을 특징으로 하는 슬라브의 폭측정방법.The central computing unit 12 receives each measured value of the distance measuring sensors 1, 2, and 3, calculates the actual width W of the slab by the following formula, and transmits it to the monitor 13. Width measuring method of the slab characterized in that the process consisting of. (실폭계산식)(Explosion calculation) (여기에서,(From here, D1 : 거리측정센서(1)와 슬라브(9)의 거리,D1: distance between the distance measuring sensor (1) and the slab (9), D2 : 거리측정센서(2)와 슬라브(9)의 거리,D2: distance between the distance sensor (2) and the slab (9), D3 : 거리측정센서(3)와 슬라브의 거리,D3: distance between the distance measuring sensor (3) and the slab, D0 : 거리측정센서(1,2)간의 고정거리,D0: fixed distance between distance measuring sensors (1, 2), L : 거리측정센서(1,3)간의 고정거리,L: fixed distance between distance measuring sensors (1, 3), W' : 슬라브의 측정폭,W 'is the measuring width of the slab, W : 슬라브의 실폭,W: the actual width of the slab, θ: 슬라브의 사행각이다)θ: meandering angle of slab)
KR1019980009344A 1998-03-18 1998-03-18 Method for measuring width of slab KR100415921B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101411874B1 (en) * 2012-10-29 2014-06-25 현대제철 주식회사 Apparatus for measuring width of material

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05196445A (en) * 1992-01-22 1993-08-06 Nisshin Steel Co Ltd Measuring method for plate thickness of trough-shaped steel plate
JPH07280526A (en) * 1994-04-11 1995-10-27 Nippon Steel Corp Thickness measuring method for steel plate by laser distance meter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05196445A (en) * 1992-01-22 1993-08-06 Nisshin Steel Co Ltd Measuring method for plate thickness of trough-shaped steel plate
JPH07280526A (en) * 1994-04-11 1995-10-27 Nippon Steel Corp Thickness measuring method for steel plate by laser distance meter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101411874B1 (en) * 2012-10-29 2014-06-25 현대제철 주식회사 Apparatus for measuring width of material

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