JPH0471826B2 - - Google Patents
Info
- Publication number
- JPH0471826B2 JPH0471826B2 JP60202774A JP20277485A JPH0471826B2 JP H0471826 B2 JPH0471826 B2 JP H0471826B2 JP 60202774 A JP60202774 A JP 60202774A JP 20277485 A JP20277485 A JP 20277485A JP H0471826 B2 JPH0471826 B2 JP H0471826B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- steel strip
- control device
- camera
- outer diameter
- 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.)
- Expired - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 238000004804 winding Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Description
【発明の詳細な説明】
(イ) 産業上の利用分野
本発明は、鋼帯コイルの外径を直接工業用テレ
ビジヨン・カメラでとらえ、画像処理によつてコ
イルの外径を算出し、ラインの送り速度を制御す
る自動減速制御装置に関するものである。[Detailed description of the invention] (a) Industrial application field The present invention directly captures the outer diameter of a steel strip coil with an industrial television camera, calculates the outer diameter of the coil through image processing, and then This invention relates to an automatic deceleration control device that controls the feed rate of a motor.
(ロ) 従来技術
鋼帯コイルから鋼帯を巻き解いて鋼帯の連続処
理ラインへ送り出す装置においては、ラインの自
動減速は、生産能率の向上、ライン・トラブル防
止のために、精度よくそのタイミングを決定する
必要がある。(b) Prior art In equipment that unwinds steel strip from a steel strip coil and sends it to a continuous steel strip processing line, automatic deceleration of the line is performed with accurate timing in order to improve production efficiency and prevent line troubles. need to be determined.
従来は、ブライドル・ロール等にパルス・ジエ
ネレータ（PLG）を取り付け、払出しリール１
回転当りの払出し量から残コイル径を計算し、コ
イル残長を求めていた。このため、ブライドル・
ロールの経時的摩耗によるロール径の変化、また
は、ブライドル・ロールと鋼帯とのスリツプ等に
より、コイル残長計算に誤差を生じ、正確な自動
減速ができなかつた。 Conventionally, a pulse generator (PLG) was attached to a bridle roll, etc., and the payout reel 1
The remaining coil diameter was calculated from the payout amount per rotation, and the remaining length of the coil was determined. For this reason, the bridle
Changes in the roll diameter due to roll wear over time or slips between the bridle roll and the steel strip caused errors in the calculation of the remaining length of the coil, making accurate automatic deceleration impossible.
(ハ) 発明が解決しようとする問題点
本発明が解決しようとする問題点は、鋼帯コイ
ルの残長を正確に把持し、ラインの生産性向上お
よびライン・トラブルの防止を図ることにある。(c) Problem to be solved by the invention The problem to be solved by the invention is to accurately grasp the remaining length of the steel strip coil, thereby improving line productivity and preventing line troubles. .
(ニ) 問題点を解決するための手段
本発明の自動減速制御装置は、鋼帯コイルから
鋼帯を巻き解いて鋼帯の連続処理ラインへ送り出
す装置において、１画素当りの分解能力が巻取コ
イルの板厚識別力を有する鋼帯コイルの側面を撮
像する工業用テレビジヨン・カメラと、前記カメ
ラからの巻取コイルの画像信号からコイルの外径
およびコイル残長ｌを算出するデジタル演算器
と、該演算器の算出、コイル残長ｌが上位計算機
からの減速目標位置Ｌに対し、ｌ＞Ｌからｌ≦Ｌ
に変わつたとき前記連続処理ラインの送り速度を
制御する制御装置とからなる構成によつて、上記
問題点を解決している。(d) Means for Solving the Problems The automatic deceleration control device of the present invention is a device that unwinds the steel strip from the steel strip coil and sends it to a continuous steel strip processing line, and the resolution capacity per pixel is the same as that of the winding. An industrial television camera that images the side surface of a steel strip coil that has the ability to identify the thickness of the coil, and a digital calculator that calculates the outer diameter of the coil and the remaining coil length l from the image signal of the wound coil from the camera. Then, the calculation unit calculates that the coil remaining length l is from l>L to l≦L with respect to the deceleration target position L from the host computer.
The above-mentioned problem is solved by a configuration comprising a control device that controls the feed rate of the continuous processing line when the continuous processing line changes.
(ホ) 実施例
第１図に示すように、鋼帯コイルＣは送出し装
置（図示せず）によつて鋼帯Ｓが繰り出され、冷
間圧延機等の鋼帯の連続処理ライン１に送られ
る。(E) Embodiment As shown in FIG. 1, a steel strip coil C is fed into a steel strip S by a feeding device (not shown), and is fed into a continuous steel strip processing line 1 such as a cold rolling mill. Sent.
本発明の自動減速制御装置２は、工業用テレビ
ジヨン・カメラ２１、カメラ制御装置２２、デジ
タル演算器２３、モニタ２４からできている。 The automatic deceleration control device 2 of the present invention is made up of an industrial television camera 21, a camera control device 22, a digital computing unit 23, and a monitor 24.
カメラ２１は鋼帯コイルＣの側面を撮像し、画
面信号をカメラ制御装置２２に送る。カメラ制御
装置２２は30Hzの垂直同期ラスタ・スキヤンニン
グによつて、カメラ２１から２次元画像を得てデ
ジタル演算器２３に送る。 The camera 21 images the side surface of the steel strip coil C and sends a screen signal to the camera control device 22. The camera control device 22 obtains a two-dimensional image from the camera 21 by 30 Hz vertically synchronized raster scanning and sends it to the digital computing unit 23.
デジタル演算器２３は、２次元画像を標本化・
量子化し、モニタ２４に送るとともに、上位計算
機３からのコイルおよびライン情報を得て、コイ
ル残長を算出し、ライン制御装置４に送る。 The digital arithmetic unit 23 samples the two-dimensional image.
It is quantized and sent to the monitor 24, and the remaining coil length is calculated by obtaining coil and line information from the host computer 3 and sent to the line control device 4.
ライン制御装置４は、連続処理ライン１の駆動
装置５の駆動速度を制御する。 The line control device 4 controls the driving speed of the driving device 5 of the continuous processing line 1 .
(ヘ) 作用
本発明の自動減速制御装置の作用について、図
面を参照して説明する。(F) Operation The operation of the automatic deceleration control device of the present invention will be explained with reference to the drawings.
上位計算機３からコイルＣの板厚ｔ（ｔ＝0.4〜
12mm）、減速目標位置Ｌ（Ｌ＝20〜40ｍ）の情報が
デジタル演算器２３に送信されてきたとする。 From the host computer 3, the plate thickness t of coil C (t=0.4 ~
12 mm) and deceleration target position L (L=20 to 40 m) is transmitted to the digital calculator 23.
自動減速制御装置２においては、デジタル演算
器２３がＴｍsec（Ｔ＝50〜100ｍsec）でカメラ制
御装置２２から２次元画像信号を取り込み、８ビ
ツトに標本・量子化し画像メモリへ格納する。 In the automatic deceleration control device 2, the digital arithmetic unit 23 takes in the two-dimensional image signal from the camera control device 22 at Tmsec (T=50 to 100 msec), samples and quantizes it into 8 bits, and stores it in the image memory.
第２図に示すように、マンドレルの内径をD0
（例えばD0＝610mm）、Ｌ＝40ｍ、ｔ＝2.0mm、コイ
ルの外径Ｄとしたとき、次式(1)が成立する。 As shown in Figure 2, the inner diameter of the mandrel is D 0
(For example, D 0 = 610 mm), L = 40 m, t = 2.0 mm, and the outer diameter of the coil D, the following formula (1) holds true.
π（Ｄ／２）2−π（D0／２）2＝Ｌ・ｔ ……(1)
(1)式より
Ｄ＝√0 2＋4
＝√6102＋４×40×103×2.0＝689（mm）
これより、最小板厚ｔ＝0.4mmのとき、必要な
画像の画素数Ｎは、
Ｎ≧68.9，／0.4×１／２＝861
よつて、カメラ視野Le＝400mm
画素数＝1024×1024
とすると、１画素当りの分解能Lpは
Lp＝400／1024＝0.39mm／画素
となる。 π(D/2) 2 −π(D 0 /2) 2 =L・t...(1) From formula (1), D=√ 0 2 +4 =√610 2 +4×40×10 3 ×2.0=689 (mm) From this, when the minimum plate thickness t = 0.4 mm, the required number of image pixels N is: N≧68.9, /0.4 x 1/2 = 861 Therefore, camera field of view Le = 400 mm Number of pixels = 1024 x 1024, the resolution Lp per pixel is Lp=400/1024=0.39 mm/pixel.
Ｔｍsec毎に取り込んだ画像から、コイル部の
みを検出するため、画像データの２値化等の前処
理を施し、コイル外径のエツジ部のみを切り出
す。 In order to detect only the coil portion from the image captured every Tmsec, preprocessing such as binarization of the image data is performed and only the edge portion of the outer diameter of the coil is cut out.
第２図に示すコイルＣの中心点P0はカメラの
据付け時に決定し、その画素の位置をP0（X0、Y0
とする。コイル外径Ｄの任意の点Pnを（Xn、
Yn）とする。Pn点におけるコイルの外径Dnは、
次式(2)から求められる。 The center point P 0 of the coil C shown in Fig. 2 is determined when the camera is installed, and the position of the pixel P 0 (X 0 , Y
shall be. Any point Pn of the coil outer diameter D is (Xn,
Yn). The outer diameter Dn of the coil at point Pn is
It is obtained from the following equation (2).
Dn＝√（−0）2＋（−0）2 ……(2)
この処理をＸ方向０〜1023点（1024点）すべて
に行い、外径の平均化処理をすると、最終的なコ
イルの外径Ｄは、(3)式で求められる。 Dn=√( -0 ) 2 +(- 0 ) 2 ...(2) If this process is performed for all points 0 to 1023 (1024 points) in the X direction and the outer diameter is averaged, the final coil The outer diameter D is determined by equation (3).
Ｄ＝１／10241023
〓n=0
２√（−）2＋（−）2
……(3)
よつて、このときのコイル残長ｌは(1)式より、次
式(4)で求められる。D=1/1024 1023 〓 n=0 2√(-) 2 +(-) 2
...(3) Therefore, the coil remaining length l at this time can be obtained from equation (1) using the following equation (4).
ｌ＝π／４（D2−D0 2）／ｔ ……(4)
Ｔｍsec毎に上記処理を実施し、上位計算機３
からの減速目標位置Ｌと比較し、ｌ＞Ｌからｌ≦
Ｌに変つたとき、ライン制御装置４に対し減速指
令を出力する。 l=π/4(D 2 −D 0 2 )/t...(4) The above process is executed every Tmsec, and the upper computer 3
Compare with deceleration target position L from l>L to l≦
When it changes to L, a deceleration command is output to the line control device 4.
(ト) 効果
本発明によれば、コイル外径が正確に測定でき
るので、ラインの生産性の向上、ライン・トラブ
ルの防止を図ることができる。(G) Effects According to the present invention, since the outer diameter of the coil can be measured accurately, line productivity can be improved and line troubles can be prevented.
第１図は本発明の自動減速制御装置の概略構成
線図。第２図は本発明の装置の作用を示す説明
図。
１：連続処理ライン、２：自動減速制御装置、
５：駆動装置、Ｃ：鋼帯コイル、Ｓ：鋼帯。
FIG. 1 is a schematic configuration diagram of an automatic deceleration control device of the present invention. FIG. 2 is an explanatory diagram showing the operation of the device of the present invention. 1: Continuous processing line, 2: Automatic deceleration control device,
5: Drive device, C: Steel strip coil, S: Steel strip.
Claims (1)
処理ラインへ送り出す装置において、１画素当り
の分解能力が巻取コイルの板厚識別力を有する鋼
帯コイルの側面を撮像する工業用テレビジヨン・
カメラと、前記カメラからの巻取コイルの画像信
号からコイルの外径およびコイル残長ｌを算出す
るデジタル演算器と、該演算器の算出、コイル残
長ｌが上位計算機からの減速目標位置Ｌに対し、
ｌ＞Ｌからｌ≦Ｌに変わつたとき前記連続処理ラ
インの送り速度を制御する制御装置とからなる自
動減速制御装置。1. An industrial television that images the side surface of a steel strip coil whose resolution per pixel has the ability to discriminate the plate thickness of the winding coil, in a device that unwinds the steel strip from the steel strip coil and sends it to a continuous steel strip processing line. Jiyoung
A camera, a digital computing unit that calculates the outer diameter of the coil and the coil remaining length l from the image signal of the winding coil from the camera, and the computing unit calculates the coil remaining length l from the deceleration target position L from the host computer. For,
an automatic deceleration control device comprising: a control device that controls the feed rate of the continuous processing line when l>L changes to l≦L;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20277485A JPS6265873A (en) | 1985-09-13 | 1985-09-13 | Automatic speed reduction control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20277485A JPS6265873A (en) | 1985-09-13 | 1985-09-13 | Automatic speed reduction control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6265873A JPS6265873A (en) | 1987-03-25 |
| JPH0471826B2 true JPH0471826B2 (en) | 1992-11-16 |
Family
ID=16462956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20277485A Granted JPS6265873A (en) | 1985-09-13 | 1985-09-13 | Automatic speed reduction control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6265873A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4872062A (en) * | 1971-12-29 | 1973-09-28 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54108872U (en) * | 1978-01-18 | 1979-07-31 |
-
1985
- 1985-09-13 JP JP20277485A patent/JPS6265873A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4872062A (en) * | 1971-12-29 | 1973-09-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6265873A (en) | 1987-03-25 |
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