JP2010032432A - Method and device for measuring plate width of steel plate - Google Patents

Method and device for measuring plate width of steel plate Download PDF

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JP2010032432A
JP2010032432A JP2008196659A JP2008196659A JP2010032432A JP 2010032432 A JP2010032432 A JP 2010032432A JP 2008196659 A JP2008196659 A JP 2008196659A JP 2008196659 A JP2008196659 A JP 2008196659A JP 2010032432 A JP2010032432 A JP 2010032432A
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plate
width
roll
steel sheet
measuring
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JP5245616B2 (en
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Naoto Ueno
直人 上野
Hidenori Takada
英紀 高田
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JFE Steel Corp
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JFE Steel Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for measuring plate width of a steel plate for accurately measuring the plate width over a steel plate entire length even when plate thickness does not exceed 0.2-0.4 mm and is thin. <P>SOLUTION: The device 1 for measuring the plate thickness includes a roll 2 winding the steel plate S, a projector (projecting part) 3 for irradiating light from a side opposed to the roll 2, a camera 4 for imaging reflection light of the projector 3, and an image processing part 5 for measuring the plate thickness of the steel plate S by processing images imaged with the camera 4. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、鋼板の板幅測定方法、および板幅測定装置に関する。   The present invention relates to a plate width measuring method and a plate width measuring apparatus for a steel plate.

鋼板の板幅は重要な品質管理項目の一つである。特に、冷延鋼板の板幅は、板幅計を用いて長手方向全長に亘りオンラインで自動的に測定されている。ここで、従来の板幅計は、水平パスに対してパスラインを挟む形で上下面に受光器および投光器を設置した光学式板幅計が採用されている(例えば特許文献1参照)。
実公昭62−022805号公報
The width of the steel sheet is one of the important quality control items. In particular, the sheet width of the cold-rolled steel sheet is automatically measured online over the entire length in the longitudinal direction using a sheet width meter. Here, a conventional plate width meter employs an optical plate width meter in which a light receiver and a projector are installed on the upper and lower surfaces so as to sandwich a pass line with respect to a horizontal path (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 62-022805

しかしながら、冷延鋼板は多種多様であり、例えば特許文献1に記載の光学式板幅計は、水平パスに対してパスラインを挟む形で設置されるため、この測定方法では、板幅方向の反り(C反り)の影響によって板幅を精度良く測定できない場合があった。
つまり、例えば自動車用の冷延鋼板であれば、その板厚が0.6〜1.0mm程度の厚さを有する。そのため、鋼板に十分な剛性があり、板幅方向の反りの影響が小さいため、上述の光学式板幅計によってオンラインで板幅を測定可能であり、この測定結果に基づいて品質保証が可能である。これに対し、例えば缶用の冷延鋼板は、その板厚が0.2〜0.4mm程度と非常に薄い。その一方で、缶用の冷延鋼板は、塗装や印刷時のずれが問題となることから、板幅精度の要求が厳しい用途においては、板幅方向の反りによる測定値の変動の影響が大きく、上述の光学式板幅計による測定値は参考にはなるものの、実際の出荷用の測定値として採用するには不十分であった。そのため、現状は、オペレータが大型のノギスによって最終的な抜き取り検査を実施し、この測定結果に基づいて品質を保証している。
そこで、本発明は、このような問題点に着目してなされたものであって、例えば板厚が0.2〜0.4mm程度と薄いものであっても、鋼板全長に亘り板幅を精度良く測定し得る鋼板の板幅測定方法、および、板幅測定装置を提供することを目的としている。
However, there are a wide variety of cold-rolled steel sheets. For example, the optical plate width meter described in Patent Document 1 is installed with a pass line sandwiched between horizontal paths. In some cases, the plate width could not be accurately measured due to the influence of warpage (C warpage).
That is, for example, in the case of a cold-rolled steel sheet for automobiles, the sheet thickness has a thickness of about 0.6 to 1.0 mm. Therefore, because the steel plate has sufficient rigidity and the influence of warpage in the plate width direction is small, the plate width can be measured online with the optical plate width meter described above, and quality assurance can be performed based on this measurement result. is there. On the other hand, for example, a cold-rolled steel sheet for cans has a very thin thickness of about 0.2 to 0.4 mm. On the other hand, cold rolled steel sheets for cans are subject to shifts during painting and printing, so in applications where sheet width accuracy demands are severe, the effect of fluctuations in measured values due to warpage in the sheet width direction is significant. Although the measured value by the above-mentioned optical plate width meter can be used as a reference, it is not sufficient for use as a measured value for actual shipment. Therefore, at present, the operator performs a final sampling inspection with a large caliper, and guarantees the quality based on the measurement result.
Therefore, the present invention has been made paying attention to such problems, and for example, even if the plate thickness is as thin as about 0.2 to 0.4 mm, the plate width is accurately measured over the entire length of the steel plate. It aims at providing the board width measuring method of a steel plate which can be measured well, and a board width measuring device.

上記課題を解決するために、本発明のうち第一の発明は、鋼板の板幅を測定する方法であって、前記鋼板をロールに巻き付けて、前記ロールに巻き付けた箇所に対向する側から光を照射し、その反射光を撮像した画像を画像処理することによって前記鋼板の板幅を測定することを特徴としている。
第一の発明に係る鋼板の板幅測定方法によれば、鋼板をロールに巻き付けた状態で、この巻き付けた箇所で鋼板の板幅を測定するので、板幅方向の反り(C反り)の影響を受けずに、板幅を測定することができる。そのため、例えば板厚が0.2〜0.4mm程度と薄いものであっても、鋼板全長に亘り精度良く板幅を測定することができる。
In order to solve the above problems, a first invention of the present invention is a method for measuring a plate width of a steel plate, wherein the steel plate is wound around a roll, and light is emitted from the side facing the portion wound around the roll. And measuring the width of the steel sheet by performing image processing on an image obtained by imaging the reflected light.
According to the sheet width measuring method of the steel sheet according to the first invention, the sheet width of the steel sheet is measured at the wound position in a state in which the steel sheet is wound around the roll, so the influence of the warp in the sheet width direction (C warp) The plate width can be measured without receiving. Therefore, even if the plate thickness is as thin as about 0.2 to 0.4 mm, the plate width can be accurately measured over the entire length of the steel plate.

また、本発明のうち第二の発明は、鋼板の板幅を測定する板幅測定装置であって、前記鋼板を巻き付けるロールと、そのロールに対向する側から光を照射する投光部と、その投光部の反射光を撮像する撮像部と、その撮像部で撮像した画像を画像処理することによって前記鋼板の板幅を測定する画像処理部と、を備えることを特徴としている。
第二の発明に係る鋼板の板幅測定装置によれば、第一の発明同様に、鋼板をロールに巻き付けた状態で、この巻き付けた箇所で鋼板の板幅を測定することができるので、板幅方向の反り(C反り)の影響を受けずに、鋼板全長に亘り精度良く板幅を測定することができる。
The second invention of the present invention is a plate width measuring device for measuring the plate width of a steel plate, a roll around which the steel plate is wound, a light projecting unit that irradiates light from the side facing the roll, An imaging unit that captures the reflected light of the light projecting unit, and an image processing unit that measures the plate width of the steel sheet by performing image processing on an image captured by the imaging unit.
According to the sheet width measuring device for a steel sheet according to the second invention, as in the first invention, the sheet width of the steel sheet can be measured at the wound position in a state where the steel sheet is wound around the roll. The plate width can be accurately measured over the entire length of the steel plate without being affected by the warp in the width direction (C warp).

ここで、第二の発明に係る鋼板の板幅測定装置において、前記鋼板を巻き付けるロールは、クラウンを有しないストレートロールであり、当該ストレートロールの上流には、センタリングポジションコントロール装置が配設されていることは好ましい。このような構成であれば、鋼板を巻き付けるロールがフラットロールなので、ロールのイニシャルクラウンの板幅に及ぼす影響による誤差を無くすことができる。そのため、撮像部で撮像した画像の処理を容易にする上で好適である。また、このフラットロールの上流には、センタリングポジションコントロール装置を配設しているので、これにより鋼板のセンタリングを行い、その通板の安定性も維持される。   Here, in the steel sheet width measuring device according to the second invention, the roll around which the steel plate is wound is a straight roll having no crown, and a centering position control device is disposed upstream of the straight roll. It is preferable. With such a configuration, since the roll around which the steel plate is wound is a flat roll, errors due to the influence on the plate width of the initial crown of the roll can be eliminated. Therefore, it is suitable for facilitating the processing of the image captured by the imaging unit. Further, since a centering position control device is disposed upstream of the flat roll, the centering of the steel plate is performed thereby maintaining the stability of the threading plate.

また、第二の発明に係る鋼板の板幅測定装置において、前記鋼板を巻き付けるロールはクラウンを有し、前記画像処理部は、前記画像処理することによって得た板幅の測定値に対し、当該ロールのクラウンによる曲率を補正して前記鋼板の板幅を算出することは好ましい。
このような構成であれば、鋼板を巻き付けるロールがクラウンを有するので、鋼板のセンタリングを行い、その通板の安定性を維持することができる。そして、画像処理部は、画像処理することによって得た板幅の測定値に対し、当該ロールのクラウンによる曲率を補正して板幅を算出するので、ロールのイニシャルクラウンの板幅に及ぼす影響による誤差を補正し得て、鋼板の板幅を算出することができる。
Further, in the sheet width measuring apparatus for the steel sheet according to the second invention, the roll around which the steel sheet is wound has a crown, and the image processing unit is configured to measure the measured value of the sheet width obtained by the image processing. It is preferable to calculate the plate width of the steel sheet by correcting the curvature due to the crown of the roll.
If it is such a structure, since the roll which winds a steel plate has a crown, centering of a steel plate can be performed and the stability of the threading plate can be maintained. The image processing unit calculates the plate width by correcting the curvature of the roll crown with respect to the measured value of the plate width obtained by image processing. The error can be corrected and the plate width of the steel plate can be calculated.

上述のように、本発明に係る鋼板の板幅測定方法および板幅測定装置によれば、例えば板厚が0.2〜0.4mm程度と薄いものであっても、鋼板全長に亘り板幅を精度良く測定することができる。   As described above, according to the plate width measuring method and the plate width measuring apparatus of the steel plate according to the present invention, even if the plate thickness is as thin as about 0.2 to 0.4 mm, the plate width over the entire length of the steel plate. Can be measured with high accuracy.

以下、本発明の一実施形態について、図面を適宜参照しつつ説明する。
図1は、本発明に係る板幅測定装置の一実施形態を示す説明図である。また、図2は、図1の一部を拡大して示す斜視図である。なお、この板幅測定装置を備える検査ラインは、スキンパスラインの後工程として連続して配設される。また、通板される帯状の鋼板は、缶用の冷延鋼板であり、その板厚は0.2〜0.4mm程度と薄いものであり、その通板速度は500mpm以上の高速ラインである場合が多い。
Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate.
FIG. 1 is an explanatory view showing an embodiment of a plate width measuring apparatus according to the present invention. FIG. 2 is an enlarged perspective view showing a part of FIG. In addition, the inspection line provided with this board width measuring apparatus is continuously arrange | positioned as a post process of a skin pass line. The strip-shaped steel plate to be passed is a cold-rolled steel plate for cans, the plate thickness is as thin as about 0.2 to 0.4 mm, and the plate passing speed is a high-speed line of 500 mpm or more. There are many cases.

図1および図2に示すように、この板幅測定装置1は、この検査ラインに通板される冷延鋼板Sを巻き付けるロール2を有して構成されている。さらに、本実施形態の例では、このロール2に対し、通板方向Hの上流には、図1に示すように、通板される冷延鋼板Sをセンタリング可能なセンタリングポジションコントロール装置(CPC装置)8が配設されている。   As shown in FIGS. 1 and 2, the sheet width measuring device 1 is configured to have a roll 2 around which a cold rolled steel sheet S passed through the inspection line is wound. Furthermore, in the example of this embodiment, a centering position control device (CPC device) capable of centering the cold-rolled steel sheet S to be passed, as shown in FIG. ) 8 is provided.

ここで、このロール2は、クラウンを有しないストレートロール(フラットロール)であり、そのロール表面はダル仕上げされている。このロール2の直径は、特に限定されないが、巻き付けられる冷延鋼板Sの反りを確実に抑えつつ通板する上では、通板される冷延鋼板Sの板厚の1500倍以上の直径を有するものが好ましい。なお、本実施形態の例では、板厚Tが0.2mm、板幅Wが850mmの冷延鋼板Sに対して、ロール2は、その直径がφ350mmのストレートロールを用いている(図2参照)。   Here, the roll 2 is a straight roll (flat roll) having no crown, and the roll surface is dull-finished. The diameter of the roll 2 is not particularly limited, but has a diameter that is 1500 times or more the plate thickness of the cold-rolled steel sheet S to be passed in order to pass the steel sheet while reliably suppressing the warp of the cold-rolled steel sheet S to be wound. Those are preferred. In the example of the present embodiment, a straight roll having a diameter of 350 mm is used as the roll 2 for the cold-rolled steel sheet S having a plate thickness T of 0.2 mm and a plate width W of 850 mm (see FIG. 2). ).

そして、図1に示すように、この板幅測定装置1は、投光器3と、この投光器3からの光の反射光を撮像可能に配置されたカメラ4とを備えている。このカメラ4で撮像した画像を画像処理することによって板幅を測定する画像処理部5と、この画像処理部5によって測定された板幅のデータが表示される表示部6とを備えて構成されている。
投光器3は、上記ロール2に巻き付けた箇所に対向する側から光を照射可能な投光部であり、例えば冷延鋼板Sの幅方向に延びる直管状の蛍光灯やLED照明あるいは光ファイバ照明などから構成され、板幅を検査中は常時点灯して、所定光量の検査光Lを冷延鋼板Sの片面の幅方向全体に照射し、カメラ4側に反射させるようになっている。
As shown in FIG. 1, the plate width measuring apparatus 1 includes a projector 3 and a camera 4 arranged so as to be able to image reflected light from the projector 3. An image processing unit 5 that measures a plate width by performing image processing on an image captured by the camera 4, and a display unit 6 that displays plate width data measured by the image processing unit 5 are configured. ing.
The light projector 3 is a light projecting unit capable of irradiating light from the side facing the portion wound around the roll 2. For example, a straight tube fluorescent lamp extending in the width direction of the cold-rolled steel sheet S, LED illumination, optical fiber illumination, etc. The light is always lit during the inspection of the plate width, and a predetermined amount of inspection light L is irradiated to the entire width direction of one side of the cold-rolled steel sheet S and reflected to the camera 4 side.

カメラ4は、例えばCCDカメラやCMOSカメラなどからなる撮像部であって、冷延鋼板Sの幅方向に沿って複数台(N台)配置したラインセンサカメラから構成されており、個々のカメラによって検査ラインを走行する冷延鋼板Sの表面を、その幅方向に一定領域ごとに分担撮影して、その個々の画像信号を、画像処理部5に出力するようになっている。本実施形態では、板幅方向での分解能が0.1mm/ピクセルのCCDカメラを二台使用した。   The camera 4 is an imaging unit composed of, for example, a CCD camera or a CMOS camera, and is composed of a plurality of (N) line sensor cameras arranged along the width direction of the cold-rolled steel sheet S. The surface of the cold-rolled steel sheet S traveling on the inspection line is shared and photographed for each predetermined region in the width direction, and the individual image signals are output to the image processing unit 5. In this embodiment, two CCD cameras having a resolution of 0.1 mm / pixel in the plate width direction are used.

なお、図1では、投光器3からの光を冷延鋼板Sの走行方向に直角に照射しているため、投光器3からの反射光を撮像するカメラ4を、明視野で撮像すべく、投光器3に対して約90°の角度で、冷延鋼板Sの通板方向の延長線上に配置しているが、投光器3およびカメラ4の設置角度や位置はこれに限定されるものでなく、投光器3の照射位置や照射角度、あるいはカメラ4の受光位置や受光角度などは、適宜最適な角度や位置に設置することができる。また、カメラ4で撮像する反射光も明視野に限らず、暗視野であってもよい。   In FIG. 1, since the light from the projector 3 is irradiated at right angles to the traveling direction of the cold-rolled steel sheet S, the projector 3 that images the reflected light from the projector 3 in a bright field is captured. However, the installation angle and position of the projector 3 and the camera 4 are not limited to this, and the projector 3 is not limited to this. The irradiation position and irradiation angle, or the light receiving position and light receiving angle of the camera 4 can be appropriately set at an optimum angle and position. The reflected light imaged by the camera 4 is not limited to a bright field, but may be a dark field.

画像処理部5は、画像処理機能を有する情報処理装置などから構成されており、カメラ4から出力される画像信号に基づいて、所定の画像処理を実行することによって板幅を測定できるようになっている。なお、この画像処理部5における板幅の測定方法は、特に限定されるものではないが、反射光の輝度情報に基づいて二値化をし、これにより、その冷延鋼板Sの両端部を、ダル仕上げされているロール表面との反射率の相違から特定し、これら特定された両端部の対向する距離を算出することによって板幅を測定することができる。
表示部6には、この検査ラインの稼働中に画像処理部5によって測定された板幅のデータおよび所定の規格に対する判断結果が表示されるようになっている。これにより、検査員は、板幅に規格外のものが発生した場合は、直ちにその旨を把握できる。
The image processing unit 5 includes an information processing apparatus having an image processing function, and can measure the plate width by executing predetermined image processing based on an image signal output from the camera 4. ing. In addition, the measuring method of the plate width in the image processing unit 5 is not particularly limited, but binarization is performed based on the luminance information of the reflected light, whereby both ends of the cold-rolled steel sheet S are The width of the plate can be measured by specifying the difference in reflectance from the roll surface that is dull-finished and calculating the distance at which these specified ends face each other.
The display unit 6 displays plate width data measured by the image processing unit 5 during the operation of the inspection line and a determination result for a predetermined standard. As a result, the inspector can immediately know when a non-standard width occurs.

次に、本実施形態の鋼板の板幅測定方法および板幅測定装置の作用・効果について説明する。
この板幅測定装置1は、冷延鋼板Sを巻き付けるロール2と、そのロール2に対向する側から光を照射する投光器3と、その投光器3の反射光を撮像するカメラ4と、そのカメラ4で撮像した画像を画像処理することによって冷延鋼板Sの板幅を測定する画像処理部5とを備えるので、冷延鋼板Sをロール2に巻き付けた状態で、この巻き付けた箇所で冷延鋼板Sの板幅を測定することができる。これにより、冷延鋼板Sの板幅方向の反り(C反り)の影響を受けずに、冷延鋼板Sの板幅を測定することができる。
Next, operations and effects of the plate width measuring method and plate width measuring apparatus of the steel plate according to the present embodiment will be described.
The plate width measuring apparatus 1 includes a roll 2 around which a cold rolled steel sheet S is wound, a projector 3 that irradiates light from a side facing the roll 2, a camera 4 that captures reflected light of the projector 3, and the camera 4 The image processing unit 5 that measures the sheet width of the cold-rolled steel sheet S by performing image processing on the image picked up in FIG. The plate width of S can be measured. Thereby, the plate width of the cold-rolled steel sheet S can be measured without being affected by the warp (C-warp) in the width direction of the cold-rolled steel sheet S.

また、この板幅測定装置1は、冷延鋼板Sを巻き付けるロール2がフラットロールなので、ロールのイニシャルクラウンの板幅に及ぼす影響による誤差を無くすことができる。そのため、カメラ4で撮像した画像の処理を容易にする上で好適である。また、このロール2の上流には、CPC装置8を配設しているので、これにより冷延鋼板Sのセンタリングを行い、その通板の安定性も維持される。   Moreover, since the roll 2 around which the cold-rolled steel sheet S is wound is a flat roll, the plate width measuring apparatus 1 can eliminate errors due to the influence on the plate width of the initial crown of the roll. Therefore, it is suitable for facilitating the processing of the image captured by the camera 4. Further, since the CPC device 8 is disposed upstream of the roll 2, the cold-rolled steel sheet S is thereby centered, and the stability of the plate is maintained.

ここで、上述した特許文献1に記載の光学式板幅計を用いて、水平パスに対してパスラインを挟む形で設置した測定方法では、板幅方向の反り(C反り)の影響によって、測定される板幅のバラツキ(真の値との差異)が最大で0.5mmであったのに対し、本実施形態の板幅測定装置1によれば、測定される板幅のバラツキを±0.1mmにすることができた。これにより、この板幅測定装置1によれば、缶用の冷延鋼板のように、板厚が0.2mmと薄いものでも、鋼板全長に亘り精度良く板幅を測定可能であることが確認できた。   Here, in the measurement method installed in the form of sandwiching the pass line with respect to the horizontal path using the optical plate width meter described in Patent Document 1 described above, due to the influence of the warp in the plate width direction (C warp), While the variation in the measured plate width (difference from the true value) was 0.5 mm at the maximum, according to the plate width measuring apparatus 1 of the present embodiment, the measured variation in the plate width is ± It could be 0.1 mm. Thereby, according to this board width measuring apparatus 1, even if a board thickness is as thin as 0.2 mm like the cold-rolled steel sheet for cans, it is confirmed that the board width can be accurately measured over the entire length of the steel sheet. did it.

以上説明したように、この実施形態での鋼板の板幅測定方法および板幅測定装置によれば、板厚が0.2〜0.4mm程度と薄いものであっても、鋼板全長に亘り板幅を精度良く測定することができる。
なお、本発明に係る鋼板の板幅測定方法および板幅測定装置は、上記実施形態に限定されるものではなく、本発明の趣旨を逸脱しなければ種々の変形が可能である。
As explained above, according to the plate width measuring method and plate width measuring apparatus of the steel plate in this embodiment, even if the plate thickness is as thin as about 0.2 to 0.4 mm, the plate extends over the entire length of the steel plate. The width can be accurately measured.
In addition, the plate width measuring method and plate width measuring apparatus of the steel plate according to the present invention are not limited to the above embodiment, and various modifications are possible without departing from the gist of the present invention.

例えば、上記実施形態では、冷延鋼板Sを巻き付けるロール2がフラットロールであり、このロール2の上流には、CPC装置8を配設した例で説明したが、これに限定されず、本発明に係る板幅測定装置は、CPC装置8に替えてエンドポジションコントロール装置(EPC装置)を配設してもよいし、また、CPC装置やEPC装置を配設せずに、冷延鋼板Sを巻き付けるロール2としてクラウンを有するロールを用いてもよい。但し、この場合において、画像処理部5は、画像処理することによって得た板幅の測定値に対し、当該ロール2のクラウンによる曲率を補正して板幅を算出するように構成することが好ましい。このような構成であれば、ロール2がクラウンを有するので、これにより、冷延鋼板Sのセンタリングを行い、その通板の安定性を維持することができる。そして、画像処理部5は、画像処理することによって得た板幅の測定値に対し、当該ロール2のクラウンによる曲率を補正して板幅を算出するので、ロール2のイニシャルクラウンの板幅に及ぼす影響による誤差を計算によって補正し得て、冷延鋼板の板幅を、鋼板全長に亘り精度良く測定することができる。   For example, in the above embodiment, the roll 2 around which the cold-rolled steel sheet S is wound is a flat roll, and an example in which the CPC device 8 is disposed upstream of the roll 2 has been described. The plate width measuring device according to the above may be provided with an end position control device (EPC device) instead of the CPC device 8, or the cold rolled steel sheet S may be provided without the CPC device or EPC device. A roll having a crown may be used as the roll 2 to be wound. However, in this case, it is preferable that the image processing unit 5 is configured to calculate the plate width by correcting the curvature due to the crown of the roll 2 with respect to the measured value of the plate width obtained by image processing. . With such a configuration, since the roll 2 has a crown, it is possible to center the cold-rolled steel sheet S and maintain the stability of the plate. Then, the image processing unit 5 calculates the plate width by correcting the curvature due to the crown of the roll 2 with respect to the measured value of the plate width obtained by the image processing, so that the plate width of the initial crown of the roll 2 is calculated. The error due to the influence can be corrected by calculation, and the width of the cold-rolled steel sheet can be accurately measured over the entire length of the steel sheet.

本発明に係る板幅測定装置の一実施形態を示す説明図である。It is explanatory drawing which shows one Embodiment of the board width measuring apparatus which concerns on this invention. 図1の一部を拡大して示す斜視図である。It is a perspective view which expands and shows a part of FIG.

符号の説明Explanation of symbols

1 板幅測定装置
2 ロール
3 投光器(投光部)
4 カメラ(撮像部)
5 画像処理部
6 表示部
8 センタリングポジションコントロール装置(CPC装置)
S 冷延鋼板(鋼板)
1 board width measuring device 2 roll 3 projector (sender)
4 Camera (imaging part)
5 Image processing unit 6 Display unit 8 Centering position control device (CPC device)
S Cold rolled steel sheet (steel sheet)

Claims (4)

鋼板の板幅を測定する方法であって、
前記鋼板をロールに巻き付けて、前記ロールに巻き付けた箇所に対向する側から光を照射し、その反射光を撮像した画像を画像処理することによって前記鋼板の板幅を測定することを特徴とする鋼板の板幅測定方法。
A method for measuring the width of a steel plate,
Wrapping the steel sheet around a roll, irradiating light from the side facing the part wound around the roll, and measuring the plate width of the steel sheet by image processing an image of the reflected light Method for measuring the width of a steel sheet.
鋼板の板幅を測定する板幅測定装置であって、
前記鋼板を巻き付けるロールと、そのロールに対向する側から光を照射する投光部と、その投光部の反射光を撮像する撮像部と、その撮像部で撮像した画像を画像処理することによって前記鋼板の板幅を測定する画像処理部と、を備えることを特徴とする鋼板の板幅測定装置。
A plate width measuring device for measuring the plate width of a steel plate,
By performing image processing on a roll around which the steel sheet is wound, a light projecting unit that irradiates light from a side facing the roll, an image capturing unit that captures reflected light of the light projecting unit, and an image captured by the image capturing unit An image processing unit for measuring a plate width of the steel plate.
前記鋼板を巻き付けるロールは、クラウンを有しないストレートロールであり、当該ストレートロールの上流には、センタリングポジションコントロール装置が配設されていることを特徴とする請求項2に記載の鋼板の板幅測定装置。   The sheet width measurement of a steel sheet according to claim 2, wherein the roll around which the steel sheet is wound is a straight roll having no crown, and a centering position control device is disposed upstream of the straight roll. apparatus. 前記鋼板を巻き付けるロールはクラウンを有し、前記画像処理部は、前記画像処理することによって得た板幅の測定値に対し、当該ロールのクラウンによる曲率を補正して前記鋼板の板幅を算出することを特徴とする請求項2に記載の鋼板の板幅測定装置。   The roll around which the steel sheet is wound has a crown, and the image processing unit calculates the sheet width of the steel sheet by correcting the curvature of the roll by correcting the curvature of the sheet width obtained by the image processing. The apparatus for measuring the width of a steel sheet according to claim 2.
JP2008196659A 2008-07-30 2008-07-30 Sheet width measuring method and sheet width measuring apparatus for cold rolled steel sheet for cans Expired - Fee Related JP5245616B2 (en)

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JPH0989803A (en) * 1995-09-28 1997-04-04 Nisshin Steel Co Ltd Method and device for surface scratch inspection of metal band
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JPS5954909A (en) * 1982-09-24 1984-03-29 Sumitomo Metal Ind Ltd Method and apparatus for measuring width of plate
JPH025011U (en) * 1988-06-23 1990-01-12
JPH04351907A (en) * 1991-05-30 1992-12-07 Mitsui Toatsu Chem Inc Width rate-of-change measuring method
JPH095020A (en) * 1995-06-16 1997-01-10 Kanegafuchi Chem Ind Co Ltd Meandering correction device and lamination device in combination therewith
JPH0989803A (en) * 1995-09-28 1997-04-04 Nisshin Steel Co Ltd Method and device for surface scratch inspection of metal band
JPH1150157A (en) * 1997-07-28 1999-02-23 Kawasaki Steel Corp Control of strip temperature in heating zone of continuous annealing furnace
JP2007291535A (en) * 2006-04-21 2007-11-08 Toray Ind Inc Apparatus and method for inspecting carbon fiber fabric

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014115217A (en) * 2012-12-11 2014-06-26 Kobe Steel Ltd Plate width measurement method and plate width measurement device

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