JP4559972B2 - Method and apparatus for detecting inner diameter crush of rolled coil - Google Patents

Method and apparatus for detecting inner diameter crush of rolled coil Download PDF

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JP4559972B2
JP4559972B2 JP2006004443A JP2006004443A JP4559972B2 JP 4559972 B2 JP4559972 B2 JP 4559972B2 JP 2006004443 A JP2006004443 A JP 2006004443A JP 2006004443 A JP2006004443 A JP 2006004443A JP 4559972 B2 JP4559972 B2 JP 4559972B2
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rolling coil
inner diameter
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JP2007187497A (en
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順弘 古家
義照 長野
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Nippon Steel Corp
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本発明は、圧延コイルの内径つぶれ検出方法および装置に関し、特に熱延コイルの内径つぶれをコンベア上で検出できる圧延コイルの内径つぶれ検出方法および装置に関するものである。   The present invention relates to a rolling coil inner diameter crush detection method and apparatus, and more particularly to a rolling coil inner diameter crush detection method and apparatus capable of detecting a crushing inner diameter of a hot rolled coil on a conveyor.

熱間圧延された鋼板を捲き取った熱延コイルは、次工程の酸洗処理工程等にコンベアで搬送され、次工程のマンドレルに装着される。ところが、捲き取られた直後の熱延コイルは最高で約８００℃にも達し、搬送中の冷却過程で鋼材質が変化する間に自重により変形し、中心の穴がつぶれる内径つぶれを生じることがある。このような内径つぶれがあると、次工程の入側でマンドレルが入らなくなるというトラブルが発生してしまう。このため、従来はつぶれが予見される鋼種については熱間圧延された後に、つぶれの程度に関係なく全数の熱延コイルを捲き直して前記トラブルに対処していた。ところが、すべての圧延コイルの穴にマンドレルが入らなくなるほどつぶれているのではないため、全数の捲き直しはコスト面で無駄を生じていた。   The hot-rolled coil obtained by scraping the hot-rolled steel sheet is transported by a conveyor to the next pickling treatment process or the like and mounted on the mandrel of the next process. However, the hot-rolled coil immediately after being scraped can reach a maximum of about 800 ° C. and deforms due to its own weight while the steel material changes during the cooling process during conveyance, resulting in a collapse of the inner diameter that collapses the central hole. is there. If there is such a collapse of the inner diameter, a trouble that the mandrel cannot enter at the entry side of the next process occurs. For this reason, conventionally, the steel types that are predicted to be crushed have been hot-rolled and then re-rolled all the hot-rolled coils regardless of the degree of crushed to deal with the above trouble. However, since it is not crushed so that the mandrel does not enter all the holes of the rolling coils, the total number of re-wounds wasted in terms of cost.

上記問題を解決するために、特許文献１に示すような圧延コイルの内径形状認識装置が提案されている。この装置は、圧延コイルを挟むように配置された投光器と受光器が、圧延コイルの端面を縦横に走査し、圧延コイルの穴の形状を認識するものである。しかしながら、この装置による測定は、投光器と受光器が圧延コイルの端面を縦横に走査するために測定に時間がかかる。またコイルの両側に投光器と受光器とを配置するため、装置が大掛かりになってしまい、光軸合わせなど光学系のメンテナンスも難しいなどの問題があった。   In order to solve the above problems, a rolling coil inner diameter shape recognition apparatus as shown in Patent Document 1 has been proposed. In this apparatus, a projector and a light receiver arranged so as to sandwich a rolling coil scan the end surface of the rolling coil vertically and horizontally to recognize the shape of the hole of the rolling coil. However, the measurement by this apparatus takes time because the projector and the light receiver scan the end face of the rolled coil in the vertical and horizontal directions. Further, since the projector and the light receiver are arranged on both sides of the coil, the apparatus becomes large, and there is a problem that maintenance of the optical system such as optical axis alignment is difficult.

また特許文献２には、圧延コイルの端面の中心線上をレーザー変位計で上下方向に走査し、縦内径を計測して内径つぶれを判定する装置が提案されている。しかしながら、この装置はレーザー変位計がコイルの中心を正確に走査する必要があり、測定位置が中心からずれると内径は小さく測定され、圧延コイルの内径つぶれを確実に検出することができないという問題があった。また、圧延コイルの幅の変化に対応するために、圧延コイルの端面から光学式の距離計までの距離を長くする必要があり、このために、高温の圧延コイルによる空気のゆらぎに影響され易いという問題があった。
特開平２−２８１１１０号公報 特開２０００−５５６３１号公報 Patent Document 2 proposes an apparatus that scans the center line of the end face of a rolled coil in the vertical direction with a laser displacement meter, measures the longitudinal inner diameter, and determines the inner diameter crushing. However, this apparatus requires a laser displacement meter to accurately scan the center of the coil, and if the measurement position deviates from the center, the inner diameter is measured to be small, and the inner diameter crush of the rolling coil cannot be reliably detected. there were. Further, in order to cope with the change in the width of the rolling coil, it is necessary to increase the distance from the end face of the rolling coil to the optical distance meter. For this reason, it is easily affected by air fluctuations caused by the high-temperature rolling coil. There was a problem.
JP-A-2-281110 JP 2000-55631 A

本発明は上記のような問題点を解決して、短時間で確実に圧延コイルの内径つぶれを検出することができ、しかもメンテナンスも容易な圧延コイルの内径つぶれ検出方法および装置を提供することを目的として完成されたものである。   The present invention provides a method and an apparatus for detecting the collapse of the inner diameter of a rolled coil, which can solve the above-described problems, can reliably detect the collapse of the inner diameter of the rolled coil in a short time, and is easy to maintain. It was completed as a purpose.

上記課題を解決するためになされた本発明は、コンベア上を搬送される圧延コイルの端面の画像を、コンベア側方の停止位置に設置されたＣＣＤカメラにより撮影し、この画像から圧延コイルの穴の短軸と長軸を求めて短軸／長軸の比率を算出し、その比率が閾値未満のときにつぶれ不良と判断することを特徴とするものである。   In order to solve the above-mentioned problems, the present invention provides an image of an end face of a rolling coil conveyed on a conveyor by a CCD camera installed at a stop position on the side of the conveyor. The ratio of the short axis / long axis is calculated by obtaining the short axis and the long axis, and when the ratio is less than the threshold value, it is determined that the crushing failure is present.

なお、コンベアの停止位置のずれ量の情報に基づいて、前記ＣＣＤカメラを横行させ、圧延コイルの外径の情報に基づいて、このＣＣＤカメラを昇降させて圧延コイルの穴の中心に追従することが好ましい。   In addition, based on the information on the deviation amount of the stop position of the conveyor, the CCD camera is traversed, and on the basis of the information on the outer diameter of the rolling coil, the CCD camera is moved up and down to follow the center of the hole in the rolling coil. Is preferred.

また本発明の装置は、圧延コイルを間歇移動するコンベアの端面の側方に配置され、圧延コイルの端面の画像を撮影するＣＣＤカメラと、このＣＣＤカメラで得られた画像を処理して圧延コイルの穴の短軸と長軸を求める画像処理装置と、この画像処理装置で得られた圧延コイルの穴の短軸と長軸からこの短軸／長軸の比を算出して圧延コイルの内径つぶれを判断するつぶれ判断手段とを有することを特徴とするものである。   The apparatus of the present invention is arranged on the side of the end face of the conveyor that intermittently moves the rolling coil, and a CCD camera that takes an image of the end face of the rolling coil, and the image obtained by this CCD camera is processed to obtain the rolling coil. Image processing apparatus for determining the short axis and long axis of the hole, and the ratio of the short axis / long axis from the short axis and long axis of the hole of the rolled coil obtained by the image processing apparatus to calculate the inner diameter of the rolling coil It is characterized by having a crush judgment means for judging crush.

なお、前記ＣＣＤカメラの外周には、圧延コイルの端面を高輝度でかつ均一に照射するリング型ストロボが設けられ、前記ＣＣＤカメラに、圧延コイルの自発光成分を除去する赤外線カットフィルターが設けられていることが好ましい。   In addition, a ring type strobe that irradiates the end surface of the rolling coil with high brightness and uniformity is provided on the outer periphery of the CCD camera, and an infrared cut filter for removing the self-luminous component of the rolling coil is provided on the CCD camera. It is preferable.

本発明の圧延コイルの内径つぶれ検出方法および装置によれば、大掛かりな装置を必要とせず、圧延コイルの内径つぶれの方向、圧延コイルの幅や圧延コイルの穴の大きさに関係なく、短時間で確実に圧延コイルの内径つぶれを検出することができ、また光軸調整等のメンテナンスも不要となる利点がある。本発明によれば内径つぶれの有無を正確に判定できるので、従来行われていた全数捲き直しをなくし、必要なコイルだけを捲き直せばよいので、大幅なコストダウンを図ることが可能となる。   According to the method and apparatus for detecting the collapse of the inner diameter of the rolled coil according to the present invention, a large-scale apparatus is not required, and a short time is required regardless of the direction of collapse of the inner diameter of the rolled coil, the width of the rolled coil, and the size of the hole of the rolled coil. Thus, it is possible to reliably detect the collapse of the inner diameter of the rolled coil and to eliminate the need for maintenance such as optical axis adjustment. According to the present invention, since it is possible to accurately determine whether or not the inner diameter is crushed, it is possible to eliminate the re-wounding of all the conventional methods and re-wound only the necessary coils, so that a significant cost reduction can be achieved.

以下に、図面を参照しつつ本発明の好ましい実施の形態を示す。
図１は本発明の実施形態を示す説明図であり、１は圧延コイルである。この圧延コイル１は、例えば外径が１１００ｍｍ〜２２００ｍｍ、幅が９００ｍｍ〜１４００ｍｍ、コイル穴径が約７６０ｍｍの熱延コイルである。２は圧延コイル１を搬送するための間歇移動式のコンベアであり、圧延コイル１は中心軸をコンベア２の移動方向と直角に載せられている。３はコンベア２の側方に配置されたＣＣＤカメラであり、停止位置において停止した圧延コイル１の端面の画像を撮影する。ＣＣＤカメラ３はその外周にリング型ストロボ４を備え、圧延コイル１の端面に対して直角に高輝度かつ均一に照射するようになっている。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory view showing an embodiment of the present invention, and 1 is a rolling coil. The rolled coil 1 is a hot rolled coil having an outer diameter of 1100 mm to 2200 mm, a width of 900 mm to 1400 mm, and a coil hole diameter of about 760 mm, for example. Reference numeral 2 denotes an intermittent movement type conveyor for conveying the rolling coil 1, and the rolling coil 1 is mounted with its central axis perpendicular to the moving direction of the conveyor 2. Reference numeral 3 denotes a CCD camera arranged on the side of the conveyor 2 and takes an image of the end face of the rolling coil 1 stopped at the stop position. The CCD camera 3 is provided with a ring-type strobe 4 on its outer periphery, and irradiates with high brightness and evenness at right angles to the end face of the rolling coil 1.

図２に示すように、ＣＣＤカメラ３とリング型ストロボ４とを搭載した駆動台５は、サーボモータ６により駆動されるＸ軸テーブル７と、サーボモータ８により駆動されるＹ軸テーブル９とによって、支持されている。Ｘ軸テーブル７はコンベア２の進行方向に移動し、Ｙ軸テーブル９は床面に対し垂直方向に移動する。コンベア２の停止位置のずれ量の情報が上位コンピュータから得られるので、その情報に基づいて駆動台５をＸ軸方向に横行させ、ＣＣＤカメラ３を圧延コイル１の穴の中心に追従させて撮影する。また、圧延コイル１の外径の情報に基づいて駆動台５をＹ軸方向に昇降させて、ＣＣＤカメラ３を圧延コイル１の穴の中心に位置させて撮影を行う。   As shown in FIG. 2, the drive base 5 on which the CCD camera 3 and the ring type strobe 4 are mounted includes an X-axis table 7 driven by a servo motor 6 and a Y-axis table 9 driven by a servo motor 8. Is supported. The X-axis table 7 moves in the traveling direction of the conveyor 2, and the Y-axis table 9 moves in a direction perpendicular to the floor surface. Since information on the shift amount of the stop position of the conveyor 2 can be obtained from the host computer, based on the information, the drive base 5 is moved in the X-axis direction, and the CCD camera 3 is caused to follow the center of the hole of the rolling coil 1 and photographed. To do. Further, based on information on the outer diameter of the rolling coil 1, the drive base 5 is moved up and down in the Y-axis direction, and the CCD camera 3 is positioned at the center of the hole of the rolling coil 1 to perform photographing.

なお、図３に示す防塵ボックス１０の内部にこれらの装置を収納し、撮影のときには前面のスライド式の防熱板１１を開き、その他の時間は防熱板１１を閉じて、駆動装置とＣＣＤカメラ３とリング型ストロボ４を高温の圧延コイル１の熱と雰囲気中の塵からから守ることが好ましい。防塵ボックス１０には内部を冷却するためのボルテックスクーラ１２が取り付けられている。   Note that these devices are housed in a dustproof box 10 shown in FIG. 3, the front slide-type heat-insulating plate 11 is opened at the time of photographing, and the heat-insulating plate 11 is closed at other times, and the driving device and the CCD camera 3 It is preferable to protect the ring-type strobe 4 from the heat of the hot rolling coil 1 and dust in the atmosphere. The dust-proof box 10 is provided with a vortex cooler 12 for cooling the inside.

圧延コイル１がＣＣＤカメラ３の設置位置まで搬送されてくると、防塵ボックス１０の防熱板１１が開き、上位コンピュータからのコンベア２の停止位置のずれ量の情報および圧延コイル１の外径の情報に基づいて駆動台５をＸ，Ｙ軸方向に移動させ、ＣＣＤカメラ３を圧延コイル１の中心に位置させる。   When the rolling coil 1 is transported to the installation position of the CCD camera 3, the heat insulating plate 11 of the dustproof box 10 is opened, information on the amount of deviation of the stop position of the conveyor 2 from the host computer and information on the outer diameter of the rolling coil 1. Based on the above, the drive base 5 is moved in the X and Y axis directions, and the CCD camera 3 is positioned at the center of the rolling coil 1.

このようにしてＣＣＤカメラ３を圧延コイル１の中心線上に位置させ、圧延コイル１の端面を撮影する。この撮影時に、リング型ストロボ４を発光させる。このリング型ストロボ４によって圧延コイル１の端面を均一に照射し、撮影された画像の輝度のムラを防止し、またＣＣＤカメラ３自体の影が写らないようにする。   In this way, the CCD camera 3 is positioned on the center line of the rolling coil 1 and the end face of the rolling coil 1 is photographed. At the time of this photographing, the ring type flash 4 is caused to emit light. The ring-type strobe 4 uniformly irradiates the end face of the rolling coil 1 to prevent uneven brightness of the photographed image and to prevent the shadow of the CCD camera 3 itself from appearing.

なお圧延コイル１が７００℃以上の高温である場合には、圧延コイル１自体が発光してしまい、圧延コイル１の穴の内部が白く写って誤検出の原因となってしまう。そこで赤外線カットフィルターをＣＣＤカメラ３に装着し、自発光成分をカットして圧延コイル１の穴の内部の写り込みを防止することが好ましい。   When the rolling coil 1 is at a high temperature of 700 ° C. or higher, the rolling coil 1 itself emits light, and the inside of the hole of the rolling coil 1 appears white, causing false detection. Therefore, it is preferable to attach an infrared cut filter to the CCD camera 3 to cut off the self-luminous component to prevent reflection in the hole of the rolling coil 1.

ＣＣＤカメラ３により撮影された圧延コイル１の端面の画像データは画像処理装置１３に入力され、図形成分の境界にある画素の値を全て背景成分の画素の値に変換して１画素分縮める収縮処理と、逆に図形成分を１画素分膨らませる膨張処理とからなる前処理をして、正確な画像の解析の障害となる孤立点ノイズを除去する。   The image data of the end face of the rolling coil 1 photographed by the CCD camera 3 is input to the image processing device 13, and all the pixel values at the boundary of the graphic component are converted into the pixel values of the background component and contracted by one pixel. A pre-process consisting of a process and, conversely, an expansion process for expanding the graphic component by one pixel is performed to remove isolated point noise that hinders accurate image analysis.

この濃淡がある画像データを２値化処理により、白色と黒色のデータにする。白色の部分は圧延コイル１の端面、黒色の部分は圧延コイル１の穴として解析を行う。ここで、圧延コイル１の端面の輝度変化に対応するため、圧延コイル１端面の平均輝度から高輝度用と低輝度用の２種類のしきい値を選択して２値化処理を行うことが好ましい。   This shaded image data is converted into white and black data by binarization processing. The white portion is analyzed as an end face of the rolled coil 1 and the black portion is analyzed as a hole of the rolled coil 1. Here, in order to cope with the luminance change of the end face of the rolled coil 1, the binarization process can be performed by selecting two threshold values for high brightness and low brightness from the average brightness of the end face of the rolled coil 1. preferable.

このようにして２値化処理されたデータから圧延コイル１の穴の重心を求め、この重心を中心として圧延コイル１の穴の円周エッジを検出する。この円周エッジから、圧延コイル１の穴の短軸および長軸を求める。そしてつぶれ判断手段１４が、図４に示す穴の短軸／長軸の比を算出する。   The center of gravity of the hole of the rolling coil 1 is obtained from the data binarized in this way, and the circumferential edge of the hole of the rolling coil 1 is detected around this center of gravity. From this circumferential edge, the short axis and long axis of the hole of the rolled coil 1 are obtained. Then, the crush determining means 14 calculates the ratio of the short axis / long axis of the hole shown in FIG.

図５に、圧延コイルの穴の実測の短軸と、短軸と長軸の比を表したグラフを示す。次工程で圧延コイル１の穴にマンドレルを入れるには、圧延コイル１の穴の短軸は例えば７２０mm以上でなければならない。図５に示したグラフより、圧延コイル１の穴の短軸／長軸の比と圧延コイル１の穴の短軸との間には、相関があることがわかる。   FIG. 5 shows a graph representing the measured minor axis of the hole in the rolled coil and the ratio of the minor axis to the major axis. In order to put the mandrel in the hole of the rolled coil 1 in the next step, the minor axis of the hole of the rolled coil 1 must be 720 mm or more, for example. From the graph shown in FIG. 5, it can be seen that there is a correlation between the ratio of the minor axis / major axis of the hole in the rolled coil 1 and the minor axis of the hole in the rolled coil 1.

このことから、短軸／長軸の比が例えば０．９３以上であれば、圧延コイル１の穴の短径は７２０ｍｍ以上であり、圧延コイル１の穴はつぶれておらず、そのまま次工程に搬送してマンドレルを挿入することができる。逆に圧延コイル１の穴の短軸／長軸の比が０．９３未満であれば、圧延コイル１の穴の短径は７２０mm未満であり、次工程に送る前に再び捲取機で捲き直す必要がある。このように適切な閾値の設定により、内径つぶれの有無の判断が可能となった。   From this, if the ratio of the short axis / long axis is 0.93 or more, for example, the short diameter of the hole of the rolled coil 1 is 720 mm or more, and the hole of the rolled coil 1 is not crushed, so that the next process is performed as it is. The mandrel can be inserted by conveying. Conversely, if the ratio of the minor axis / major axis of the hole in the rolled coil 1 is less than 0.93, the minor axis of the hole in the rolled coil 1 is less than 720 mm, and is rolled again with a scraper before sending it to the next process. I need to fix it. As described above, it is possible to determine whether or not the inner diameter is crushed by setting an appropriate threshold value.

圧延コイル１の幅は、製造する製品によっては一定でなく、圧延コイル１の端面からＣＣＤカメラ３の距離は一定ではない。このことから、撮影された画像データから圧延コイル１の穴の短軸を算出しようとすると、圧延コイル１の端面からＣＣＤカメラ３の距離に応じて、圧延コイル１の穴の大きさが変化して算出されてしまうが、本発明では圧延コイル１の穴の短軸と長軸の比から圧延コイル１の内径つぶれを検出することとしたので、圧延コイル１の幅に影響されることなく圧延コイル１の内径つぶれを検出が可能となった。   The width of the rolling coil 1 is not constant depending on the product to be manufactured, and the distance from the end face of the rolling coil 1 to the CCD camera 3 is not constant. From this, when trying to calculate the short axis of the hole of the rolling coil 1 from the photographed image data, the size of the hole of the rolling coil 1 changes according to the distance of the CCD camera 3 from the end face of the rolling coil 1. In the present invention, since the inner diameter crush of the rolling coil 1 is detected from the ratio of the short axis to the long axis of the hole of the rolling coil 1, rolling is not affected by the width of the rolling coil 1. The inner diameter crush of the coil 1 can be detected.

また、圧延コイル１の片側だけに装置を設置すればよいので大掛かりな装置を必要とせず、また光軸調整等のメンテナンスも不要である。さらに従来のようにカメラを走査する必要がなく、１０秒以内の短い停止時間中に測定が可能である。このように、短時間内に確実に圧延コイル１の内径つぶれを検出することができる。そして短軸／長軸の比が閾値に達しなかったコイルだけを捲き直せばよいので、大幅なコストダウンを図ることが可能となる。   Further, since it is sufficient to install the apparatus only on one side of the rolling coil 1, a large-scale apparatus is not required, and maintenance such as optical axis adjustment is unnecessary. Further, it is not necessary to scan the camera as in the prior art, and measurement can be performed during a short stop time within 10 seconds. Thus, the inner diameter crush of the rolling coil 1 can be reliably detected within a short time. Since only the coil whose ratio of the short axis / long axis does not reach the threshold value needs to be re-rolled, the cost can be greatly reduced.

本発明実施の形態を示す説明図である。It is explanatory drawing which shows embodiment of this invention. ＣＣＤカメラの駆動装置の説明図である。It is explanatory drawing of the drive device of a CCD camera. 防塵ボックスの斜視図である。It is a perspective view of a dustproof box. 圧延コイルの端面の説明図である。It is explanatory drawing of the end surface of a rolling coil. 圧延コイルの穴の実測の短軸と、短軸／長軸の比を表したグラフである。It is the graph showing the ratio of the short axis of the measurement of the hole of a rolling coil, and a short axis / long axis.

符号の説明Explanation of symbols

１ 圧延コイル
２ コンベア
３ ＣＣＤカメラ
４ リング型ストロボ
５ 駆動台
６ サーボモータ
７ Ｘ軸テーブル
８ サーボモータ
９ Ｙ軸テーブル
１０ 防塵ボックス
１１ 防熱板
１２ ボルテックスクーラ
１３ 画像処理装置
１４ つぶれ判断手段 1 Rolling coil
DESCRIPTION OF SYMBOLS 2 Conveyor 3 CCD camera 4 Ring-type strobe 5 Drive stand 6 Servo motor 7 X-axis table 8 Servo motor 9 Y-axis table 10 Dust-proof box 11 Heat-insulating plate 12 Vortex school 13 Image processing device 14 Collapse judgment means

Claims (6)

コンベア上を搬送される圧延コイルの端面の画像を、コンベア側方の停止位置に設置されたＣＣＤカメラにより撮影し、この画像から圧延コイルの穴の短軸と長軸を求めて短軸／長軸の比率を算出し、その比率が閾値未満のときにつぶれ不良と判断することを特徴とする圧延コイルの内径つぶれ検出方法。   An image of the end face of the rolling coil conveyed on the conveyor is taken by a CCD camera installed at a stop position on the side of the conveyor, and the short axis / long axis of the hole of the rolling coil is obtained from this image to obtain the short axis / long axis. A method for detecting a collapse of an inner diameter of a rolled coil, wherein a ratio of shafts is calculated, and a collapse failure is determined when the ratio is less than a threshold value. コンベアの停止位置のずれ量の情報に基づいてＣＣＤカメラを横行させ、圧延コイルの穴の中心に追従させて撮影することを特徴とする請求項１に記載の圧延コイルの内径つぶれ検出方法。   2. The method for detecting an inner diameter crush of a rolling coil according to claim 1, wherein the photographing is performed by causing the CCD camera to traverse and follow the center of the hole of the rolling coil based on information on the amount of deviation of the stop position of the conveyor. 圧延コイルの外径の情報に基づいてＣＣＤカメラを昇降させて、圧延コイルの穴の中心に追従させて撮影することを特徴とする請求項１または２に記載の圧延コイルの内径つぶれ検出方法。   3. The method for detecting the collapse of an inner diameter of a rolled coil according to claim 1, wherein the CCD camera is moved up and down based on information on the outer diameter of the rolled coil so as to follow the center of the hole of the rolled coil. 圧延コイルを間歇移動するコンベアの端面の側方に配置され、圧延コイルの端面の画像を撮影するＣＣＤカメラと、このＣＣＤカメラで得られた画像を処理して圧延コイルの穴の短軸と長軸を求める画像処理装置と、この画像処理装置で得られた圧延コイルの穴の短軸と長軸からこの短軸／長軸の比を算出して圧延コイルの内径つぶれを判断するつぶれ判断手段とを有することを特徴とする圧延コイルの内径つぶれ検出装置。   A CCD camera that is disposed on the side of the end face of the conveyor that moves the rolling coil intermittently, and that captures an image of the end face of the rolling coil, and processes the image obtained by this CCD camera to short axis and length of the hole of the rolling coil Image processing apparatus for determining the axis, and a crush determining means for calculating the ratio of the short axis / long axis from the short axis and the long axis of the hole of the rolling coil obtained by the image processing apparatus and determining the crushing of the inner diameter of the rolling coil An apparatus for detecting an inner diameter crush of a rolled coil, comprising: ＣＣＤカメラの外周に、圧延コイルの端面を高輝度でかつ均一に照射するリング型ストロボを配置したことを特徴とする請求項４に記載の圧延コイルの内径つぶれ検出装置。   5. The rolling coil inner diameter crushing detecting device according to claim 4, wherein a ring-type strobe for uniformly irradiating the end surface of the rolling coil with high brightness is disposed on the outer periphery of the CCD camera. ＣＣＤカメラに、圧延コイルの自発光成分を除去する赤外線カットフィルターを設けたことを特徴とする請求項４に記載の圧延コイルの内径つぶれ検出装置。   5. The rolling coil inner diameter crushing detecting device according to claim 4, wherein the CCD camera is provided with an infrared cut filter for removing a self-luminous component of the rolling coil.
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JP6303883B2 (en) * 2014-07-15 2018-04-04 新日鐵住金株式会社 Coil inner peripheral hole deformation measuring device and coil inner peripheral hole deformation measuring method
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WO2020128572A1 (en) * 2018-12-18 2020-06-25 Arcelormittal Method for detecting issues with coil eyes and a coil eye diameter measurement camera system therefor

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JPH04118215U (en) * 1991-03-26 1992-10-22 三菱重工業株式会社 Coil inner diameter abnormality detection device
JPH05337544A (en) * 1992-06-10 1993-12-21 Nkk Corp Sheet coil inner diameter measuring instrument
JPH06102195A (en) * 1992-09-18 1994-04-15 Kawasaki Steel Corp Inspection method and device for surface flaw
JP2000055631A (en) * 1998-08-13 2000-02-25 Kawasaki Steel Corp Measuring method of coil winding condition
JP2000254726A (en) * 1999-03-09 2000-09-19 Kawasaki Steel Corp Coil mounting method of pay off reel
JP2002143925A (en) * 2000-11-07 2002-05-21 Kawasaki Steel Corp Method and device for detecting inside diameter of coil

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Publication number Priority date Publication date Assignee Title
JPH04118215U (en) * 1991-03-26 1992-10-22 三菱重工業株式会社 Coil inner diameter abnormality detection device
JPH05337544A (en) * 1992-06-10 1993-12-21 Nkk Corp Sheet coil inner diameter measuring instrument
JPH06102195A (en) * 1992-09-18 1994-04-15 Kawasaki Steel Corp Inspection method and device for surface flaw
JP2000055631A (en) * 1998-08-13 2000-02-25 Kawasaki Steel Corp Measuring method of coil winding condition
JP2000254726A (en) * 1999-03-09 2000-09-19 Kawasaki Steel Corp Coil mounting method of pay off reel
JP2002143925A (en) * 2000-11-07 2002-05-21 Kawasaki Steel Corp Method and device for detecting inside diameter of coil

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