JPH05157550A - Method and apparatus for measuring shape of steel plate - Google Patents

Method and apparatus for measuring shape of steel plate

Info

Publication number
JPH05157550A
JPH05157550A JP3341756A JP34175691A JPH05157550A JP H05157550 A JPH05157550 A JP H05157550A JP 3341756 A JP3341756 A JP 3341756A JP 34175691 A JP34175691 A JP 34175691A JP H05157550 A JPH05157550 A JP H05157550A
Authority
JP
Japan
Prior art keywords
steel sheet
steel plate
amount
shape
distance
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.)
Granted
Application number
JP3341756A
Other languages
Japanese (ja)
Other versions
JP3010398B2 (en
Inventor
Koichi Shinomiya
宏一 四宮
Kazuo Yamamoto
一男 山本
Kiyoshi Nishioka
潔 西岡
Yasushi Mizutani
泰 水谷
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.)
Nippon Steel Corp
Original Assignee
Nippon 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP3341756A priority Critical patent/JP3010398B2/en
Publication of JPH05157550A publication Critical patent/JPH05157550A/en
Application granted granted Critical
Publication of JP3010398B2 publication Critical patent/JP3010398B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To measure the shape of a steel plate accurately even if the steel plate is vibrated. CONSTITUTION:When a steel plate 5 after rolling passes transfer rolls 6, the distances to the steel plate 5 are continuously detected by distance detectors 1, which are provided at an equal interval at the same height over the transfer rolls 6 in the conveying direction, and the deflecting amount of the steel plate 5 is computed. The deflecting amount is used at the inclination of the tangent line of the shape of the steel plate 5. The bending amount of the steel plate 5 in the longitudinal direction is computed with a length gage 2, which is connected to the transfer roll 6.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、圧延後の鋼板の形状測
定に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to measuring the shape of a steel sheet after rolling.

【0002】[0002]

【従来の技術】従来、鋼板の形状を測定するには、距離
検出器を1つ用い、搬送中の鋼板についてある基準点か
ら鋼板表面までの距離を連続的に測定し、測定データを
連ねることによって搬送方向の鋼板形状を求めるか、距
離検出器を2つ用い、搬送方向に並んだ2つの基準点か
ら鋼板表面までの距離を連続的に測定し、2つの距離測
定値の差を搬送方向に積分していくことにより搬送方向
の鋼板形状を求めていた。
2. Description of the Related Art Conventionally, in order to measure the shape of a steel sheet, one distance detector is used, the distance from a certain reference point to the steel sheet surface of the steel sheet being conveyed is continuously measured, and the measured data are connected. Determine the steel plate shape in the transport direction by using, or use two distance detectors to continuously measure the distance from the two reference points lined up in the transport direction to the steel plate surface, and then calculate the difference between the two distance measurement values in the transport direction. The steel plate shape in the transport direction was obtained by integrating

【0003】[0003]

【発明が解決しようとする課題】しかし、実際の搬送中
の鋼板はテーブル上で振動するため、鋼板の上下動或い
は板の頭・尾の振動が起こる。そのため検出距離に振動
による誤差が生じ、正確な形状が求められない。
However, since the steel sheet actually conveyed oscillates on the table, vertical movement of the steel sheet or vibration of the head / tail of the sheet occurs. Therefore, an error occurs due to vibration in the detection distance, and an accurate shape cannot be obtained.

【0004】[0004]

【課題を解決するための手段】本発明の要旨は、圧延後
の鋼板が搬送ロール上を通過する際、搬送ロール上方に
同じ高さでかつ搬送方向に等間隔に設置した距離検出器
により鋼板までの距離を連続的に検出して鋼板のたわみ
量を算出し、たわみ量を鋼板の形状の接線の傾きとして
使用し、搬送ロールに接続した長さ計から鋼板の長さ方
向の曲がり量を算出することを特徴とする鋼板の形状測
定方法、および、圧延後の鋼板を搬送する搬送ロールの
上方に同じ高さでかつ搬送方向に等間隔に距離検出器を
設置し、搬送ロールに長さ計を接続し、距離検出器から
の検出値に基づいて鋼板のたわみ量を算出しかつたわみ
量と長さ計からの検出値に基づいて鋼板の長さ方向の曲
がり量を算出する演算装置を備えたことを特徴とする鋼
板の形状測定装置である。
Means for Solving the Problems The gist of the present invention is that when a rolled steel sheet passes over a conveyor roll, the steel sheet is detected by a distance detector installed at the same height above the conveyor roll and at equal intervals in the conveyor direction. Distance is continuously detected to calculate the amount of bending of the steel sheet, and the amount of bending is used as the inclination of the tangent line of the shape of the steel sheet, and the bending amount in the length direction of the steel sheet is calculated from the length meter connected to the conveyor roll. A method of measuring the shape of a steel sheet, which is characterized by calculating, and a distance detector is installed at the same height above the conveyor roll that conveys the rolled steel sheet and at equal intervals in the conveyor direction, and the length of the conveyor roll is set. Connect a meter to calculate the bending amount of the steel plate based on the detection value from the distance detector and calculate the bending amount in the length direction of the steel plate based on the bending amount and the detection value from the length meter. A steel sheet shape measuring device characterized in that A.

【0005】[0005]

【作用、実施例】以下、図示の実施例に基づいて本発明
の作用を説明する。
Operation and Embodiments The operation of the present invention will be described below with reference to the illustrated embodiments.

【0006】図1は本発明の実施例を示す図である。FIG. 1 is a diagram showing an embodiment of the present invention.

【0007】搬送ロール6の上を圧延後の鋼板5が通過
する。鋼板5の上方には鋼板進行方向へ同じ高さで距離
検出器1が等間隔で数台設置されている。鋼板5の長さ
を検出するため、搬送ロール6には長さ計2のパルスジ
ェネレータが接続されている。距離検出器1から同時に
採取したデータを演算装置3に入力し、演算を行う。こ
の結果を出力部4へ送る。出力部4で演算した鋼板形状
を表示する。なお、距離検出器1としてはレーザ方式変
位計、超音波等公知の距離検出器が使用できる。また、
厚板の場合、圧延方向の形状は周期1m程度で変化する
ことが多いので、検出器間隔つまり測定間隔は100〜
200mm程度にするのがよい。
The rolled steel plate 5 passes over the transport rolls 6. Several distance detectors 1 are installed above the steel plate 5 at the same height in the traveling direction of the steel plate at equal intervals. In order to detect the length of the steel plate 5, a pulse generator having a length meter 2 is connected to the transport roll 6. The data collected from the distance detector 1 at the same time is input to the arithmetic unit 3 to perform arithmetic. The result is sent to the output unit 4. The steel plate shape calculated by the output unit 4 is displayed. As the distance detector 1, a known distance detector such as a laser displacement meter or ultrasonic wave can be used. Also,
In the case of a thick plate, the shape in the rolling direction often changes at a period of about 1 m, so the detector interval, that is, the measurement interval is 100 to
It is good to set it to about 200 mm.

【0008】図2は本発明による鋼板の形状測定方法の
フローチャートを示す図である。
FIG. 2 is a flowchart showing a method for measuring the shape of a steel sheet according to the present invention.

【0009】まず、計測開始点を決定するため板先端の
チェックを行う。これはデータから判断しても良いし、
また別に検出器を取り付けてスタートトリガ用として用
いても良い。
First, the plate tip is checked to determine the measurement start point. You can judge this from the data,
A separate detector may be attached and used as a start trigger.

【0010】検出が始まり、板までの距離を3台以上の
検出器から同時にデータl1i、l2i、l3i…として取り
込む。これを板が通過するまで行い、板がなくなったら
データの取込みをやめる。データサンプル時間は短いほ
ど板形状のデータ数Nが取れるため、実際の板形状に近
い結果が得られる。なお、サンプル時間は検出器の限界
に留意する必要がある。例えばレーザ方式変位計では1
0msec程度まで可能である。
Detection is started, and the distance to the plate is simultaneously taken in as data l 1i , l 2i , l 3i ... From three or more detectors. Do this until the board passes, and stop collecting data when the board is gone. As the data sampling time is shorter, the number N of pieces of plate shape data can be obtained, so that a result closer to the actual plate shape can be obtained. It is necessary to pay attention to the limit of the detector regarding the sample time. For example, in the case of a laser displacement meter,
It is possible up to about 0 msec.

【0011】次に、このデータからたわみ量を算出す
る。各検出器の間でどのくらい板が反っているかがたわ
み量Bとなる。各検出器間の距離をdとすると、たわみ
量Bは数1で求められる。
Next, the amount of deflection is calculated from this data. The amount of deflection B is how much the plate is warped between the detectors. When the distance between the detectors is d, the amount of deflection B can be calculated by Equation 1.

【0012】[0012]

【数1】 [Equation 1]

【0013】これをデータ数Nだけ繰り返し、B1 、B
2 、B3 、…、BN と求めていく。
This is repeated for the number of data N, and B 1 , B
2, B 3, ..., to seek and B N.

【0014】そして、板形状計算はこのたわみ量Bから
算出することになる。詳しい計算方法は図4で説明す
る。
The plate shape is calculated from this deflection amount B. The detailed calculation method will be described with reference to FIG.

【0015】図3は板のたわみ量を求める原理を説明す
るための図である。
FIG. 3 is a diagram for explaining the principle of obtaining the deflection amount of the plate.

【0016】例えば、3台の距離検出器D1 、D2 、D
3 から板までの距離をそれぞれl1 、l2 、l3 とし、
1 とD3 の間での反りをたわみ量とする。このたわみ
量は検出器が等間隔であることから簡単に求めることが
できる。但し、この図ではわかり易くするため極端に大
きくしてあるが、実際のたわみ量は非常に小さい。
For example, three distance detectors D 1 , D 2 , D
The distances from 3 to the plate are l 1 , l 2 and l 3 , respectively,
The warp between D 1 and D 3 is the amount of deflection. This deflection amount can be easily obtained because the detectors are evenly spaced. However, in this figure, although it is made extremely large for the sake of clarity, the actual amount of deflection is very small.

【0017】図4はたわみ量から形状を算出するための
方法を示す図である。
FIG. 4 is a diagram showing a method for calculating the shape from the amount of deflection.

【0018】基準線として数2の傾きの線を引く。次に
1 測定点から数3の傾きを持った線を引く。同様にB
2 点から数4の傾きを持った接線を引く。BN 点から引
く接線の傾きは数5となる。これを繰り返すことによっ
て接線が集まり、これが板の形状となる。
As a reference line, a line having a slope of the equation 2 is drawn. Next, draw a line having a slope of several 3 from the B 1 measurement point. Similarly B
Draw a tangent line with a slope of 4 from 2 points. The slope of the tangent line drawn from the B N point is given by Equation 5. By repeating this, the tangent lines gather to form a plate shape.

【0019】[0019]

【数2】 [Equation 2]

【0020】[0020]

【数3】 [Equation 3]

【0021】[0021]

【数4】 [Equation 4]

【0022】[0022]

【数5】 [Equation 5]

【0023】図5は形状計算で用いる係数の説明図であ
る。
FIG. 5 is an explanatory diagram of coefficients used in the shape calculation.

【0024】測定範囲は、鋼板の形状変化が数mm/m
であり距離検出器間の距離が100〜200mmである
ことから、大きい半径を持つ円上の微小な円弧と仮定で
きる。図中でたわみ量BはAに相当し、A:Bがわかる
ことによって傾きの係数が算出できる。微小な円弧であ
り、また△abcと△aebは相似であることからB:
C=4:1であり、またA≒CであることからA:B=
1:4となる。これより、たわみ量から接線を求めるた
めには4倍の係数がたわみ量に掛かる。
The measurement range is such that the shape change of the steel plate is several mm / m.
Since the distance between the distance detectors is 100 to 200 mm, it can be assumed to be a minute arc on a circle having a large radius. The deflection amount B in the figure corresponds to A, and the coefficient of inclination can be calculated by knowing A: B. Since it is a minute arc, and Δabc and Δaeb are similar, B:
Since C = 4: 1 and A≈C, A: B =
It will be 1: 4. Therefore, in order to obtain the tangent line from the amount of deflection, the amount of deflection is multiplied by a factor of four.

【0025】[0025]

【発明の効果】本発明によって、鋼板の振動による測定
誤差が生じることなく鋼板の形状が求められる。
According to the present invention, the shape of a steel sheet can be obtained without causing a measurement error due to the vibration of the steel sheet.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例を示す図である。FIG. 1 is a diagram showing an embodiment of the present invention.

【図2】本発明による鋼板の形状測定方法のフローチャ
ートを示す図である。
FIG. 2 is a diagram showing a flowchart of a method for measuring the shape of a steel sheet according to the present invention.

【図3】板のたわみ量を求める原理を説明するための図
である。
FIG. 3 is a diagram for explaining the principle of obtaining the deflection amount of a plate.

【図4】たわみ量から形状を算出するための方法を示す
図である。
FIG. 4 is a diagram showing a method for calculating a shape from a deflection amount.

【図5】形状計算で用いる係数の説明図である。FIG. 5 is an explanatory diagram of coefficients used in shape calculation.

【符号の説明】[Explanation of symbols]

1 距離検出器 2 長さ計 3 演算装置 4 出力部 5 鋼板 6 搬送ロール 1 distance detector 2 length meter 3 arithmetic unit 4 output unit 5 steel plate 6 transport roll

───────────────────────────────────────────────────── フロントページの続き (72)発明者 水谷 泰 千葉県君津市君津1 新日本製鐵株式会社 君津製鐵所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasushi Mizutani 1 Kimitsu, Kimitsu-shi, Chiba Nippon Steel Corporation Kimitsu Works

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 圧延後の鋼板が搬送ロール上を通過する
際、搬送ロール上方に同じ高さでかつ搬送方向に等間隔
に設置した距離検出器により鋼板までの距離を連続的に
検出して鋼板のたわみ量を算出し、たわみ量を鋼板の形
状の接線の傾きとして使用し、搬送ロールに接続した長
さ計から鋼板の長さ方向の曲がり量を算出することを特
徴とする鋼板の形状測定方法。
1. When a rolled steel sheet passes over a conveyor roll, the distance to the steel sheet is continuously detected by a distance detector installed at the same height above the conveyor roll at equal intervals in the conveyor direction. Shape of steel sheet characterized by calculating the amount of deflection of the steel sheet, using the amount of deflection as the inclination of the tangent to the shape of the steel sheet, and calculating the amount of bending in the length direction of the steel sheet from the length meter connected to the transport roll. Measuring method.
【請求項2】 圧延後の鋼板を搬送する搬送ロールの上
方に同じ高さでかつ搬送方向に等間隔に距離検出器を設
置し、搬送ロールに長さ計を接続し、距離検出器からの
検出値に基づいて鋼板のたわみ量を算出しかつたわみ量
と長さ計からの検出値に基づいて鋼板の長さ方向の曲が
り量を算出する演算装置を備えたことを特徴とする鋼板
の形状測定装置。
2. A distance detector is installed at the same height above the conveying roll for conveying the rolled steel sheet and at equal intervals in the conveying direction, and a length meter is connected to the conveying roll to detect the distance from the distance detector. Shape of steel sheet characterized by including a computing device for calculating the amount of deflection of the steel sheet based on the detected value and for calculating the amount of bending in the length direction of the steel sheet based on the amount of deflection and the detected value from the length meter measuring device.
JP3341756A 1991-12-02 1991-12-02 Steel sheet shape measurement method Expired - Lifetime JP3010398B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3341756A JP3010398B2 (en) 1991-12-02 1991-12-02 Steel sheet shape measurement method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3341756A JP3010398B2 (en) 1991-12-02 1991-12-02 Steel sheet shape measurement method

Publications (2)

Publication Number Publication Date
JPH05157550A true JPH05157550A (en) 1993-06-22
JP3010398B2 JP3010398B2 (en) 2000-02-21

Family

ID=18348520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3341756A Expired - Lifetime JP3010398B2 (en) 1991-12-02 1991-12-02 Steel sheet shape measurement method

Country Status (1)

Country Link
JP (1) JP3010398B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004340653A (en) * 2003-05-14 2004-12-02 Ntn Corp Measuring method of conical surface shape of tapered roller bearing
CN105021136A (en) * 2015-06-26 2015-11-04 淮南市巨惠工贸有限公司 Device detecting plate shape of aluminum-plastic plate in real time

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004340653A (en) * 2003-05-14 2004-12-02 Ntn Corp Measuring method of conical surface shape of tapered roller bearing
CN105021136A (en) * 2015-06-26 2015-11-04 淮南市巨惠工贸有限公司 Device detecting plate shape of aluminum-plastic plate in real time

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Publication number Publication date
JP3010398B2 (en) 2000-02-21

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