JP6128009B2 - Method and apparatus for measuring thickness of striped steel sheet - Google Patents

Method and apparatus for measuring thickness of striped steel sheet Download PDF

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JP6128009B2
JP6128009B2 JP2014033917A JP2014033917A JP6128009B2 JP 6128009 B2 JP6128009 B2 JP 6128009B2 JP 2014033917 A JP2014033917 A JP 2014033917A JP 2014033917 A JP2014033917 A JP 2014033917A JP 6128009 B2 JP6128009 B2 JP 6128009B2
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小林　直人
直人 小林
手塚　浩一
浩一 手塚
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JFE Steel Corp
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本発明は、鋼板表面に圧延方向に平行な突起が付いている縞鋼板の板厚をオンラインで測定する縞鋼板の板厚測定方法および板厚測定装置に関する。   The present invention relates to a striped steel plate thickness measuring method and a plate thickness measuring apparatus for measuring on-line the thickness of a striped steel plate having protrusions parallel to the rolling direction on the steel plate surface.

縞鋼板は鋼板表面に突起形状が連続して複数存在しており、熱間圧延ラインにて模様付きの仕上圧延ロールによって圧延されてコイル状に巻き取られて製造される。従来、熱間圧延ラインにおいてはＸ線又はγ線板厚計を用いて板厚をオンラインで測定している。しかし、突起部の幅が数ｍｍ〜数十ｍｍと小さく、圧延鋼板に蛇行等による幅方向の変位（横振れ）が生じると、検出器で放射線量を積算する時間（サンプリング時間）内において放射線視野から突起部が外れてしまうことが発生し、そのため、突起部の板厚測定精度が低下する問題がある。   The striped steel sheet has a plurality of protrusions continuously formed on the surface of the steel sheet, and is manufactured by being rolled by a patterned finish rolling roll in a hot rolling line and wound into a coil shape. Conventionally, in a hot rolling line, the plate thickness is measured online using an X-ray or γ-ray plate thickness meter. However, when the width of the protrusion is as small as several mm to several tens mm and the rolled steel sheet undergoes displacement in the width direction (lateral shake) due to meandering or the like, radiation is accumulated within the time (sampling time) for integrating the radiation dose with the detector. There is a problem that the protruding portion is removed from the field of view, and therefore the plate thickness measurement accuracy of the protruding portion is lowered.

このような問題を解決することができる技術として、圧延機出側または中間に位置する板幅計の横振れ信号を用いて、Ｘ線板厚計であるＸ線Ｃフレームを板幅の横振れに追従して移動させることにより、常に突起部あるいは突起部間の底部を測定する技術が提案されている（特許文献１参照）。   As a technique that can solve such a problem, an X-ray C frame, which is an X-ray thickness gauge, is used to detect the lateral fluctuation of the plate width by using the lateral deflection signal of the plate width meter located on the rolling mill exit side or in the middle. A technique has been proposed in which the protrusions or the bottoms between the protrusions are always measured by following and moving (see Patent Document 1).

特開平９−３８７０６号公報JP-A-9-38706

しかし、特許文献１の技術では、板厚計の圧延ライン上流側に板幅計が必要であり、板厚計単体でのオンライン測定を実施することができない。また、板厚計と板幅計とは長手方向で距離があるため、板幅方向の横振れに対する追従精度に板厚測定精度が依存してしまう。さらに、板幅方向の横振れの変動が大きい場合は、Ｘ線Ｃフレームの台車の駆動能力によっては追従できない場合もある。さらにまた、板幅方向の一部のみの測定であるため、鋼板の全幅における板厚は保証されない。   However, in the technique of Patent Document 1, a sheet width meter is required on the upstream side of the rolling line of the plate thickness meter, and online measurement cannot be performed with the plate thickness meter alone. In addition, since the thickness gauge and the width meter have a distance in the longitudinal direction, the thickness measurement accuracy depends on the tracking accuracy with respect to the lateral runout in the width direction. Furthermore, when the fluctuation of the lateral runout in the plate width direction is large, it may not be possible to follow depending on the driving ability of the cart of the X-ray C frame. Furthermore, since the measurement is only for a part in the plate width direction, the plate thickness in the full width of the steel plate is not guaranteed.

本発明は、かかる事情に鑑みてなされたものであって、板幅計を用いることなく、板厚計単体で、鋼板幅方向の変位による測定精度低下を抑制しつつ縞鋼板の全幅にわたって板厚のオンライン測定を可能とする技術を提供することを課題とする。   The present invention has been made in view of such circumstances, and without using a plate width meter, the plate thickness meter alone, while suppressing the decrease in measurement accuracy due to displacement in the steel plate width direction, the plate thickness over the entire width of the striped steel plate It is an object to provide a technology that enables online measurement.

上記課題を解決するため、本発明は、以下の（１）〜（６）を提供する。 In order to solve the above problems, the present invention provides the following (1) to ( 6 ).

（１）熱間圧延機で圧延して得られた縞鋼板の板厚をオンラインで測定する縞鋼板の板厚測定方法であって、
前記熱間圧延機の出側に縞鋼板全幅の板厚を同時測定可能な多チャンネルタイプのＸ線板厚計またはγ線板厚計からなる板厚計を設置し、前記板厚計で縞鋼板の全幅板厚プロファイルデータを測定し、前記全幅板厚プロファイルデータのうち鋼板幅方向の変位の影響を受けていないデータのみを抽出して縞鋼板の板厚を求め、
その際に、板厚測定の際のサンプリング時間内における縞鋼板の幅方向の変位量を検出し、その変位量があらかじめ設定された閾値よりも小さい場合に、鋼板幅方向の変位の影響を受けていないデータとみなし、
前記あらかじめ設定された閾値は、Ｘ線またはγ線の視野幅であり、
縞鋼板の板厚を測定する測定周期ごとに前記全幅板厚プロファイルデータから検出した鋼板幅方向のエッジ位置を元に、鋼板幅方向の変位を算出することを特徴とする縞鋼板の板厚測定方法。 (1) A method for measuring the thickness of a striped steel plate obtained by rolling online with a hot rolling mill, wherein the thickness of the striped steel plate is measured online.
Installed on the outlet side of the hot rolling mill is a multi-channel type X-ray thickness gauge or γ-ray thickness gauge capable of simultaneously measuring the thickness of the full width of the striped steel sheet. the overall width thickness profile data of the steel sheet was measured, the total width thickness profile data which is not affected by the steel plate width direction of displacement of the data only extract and Me the thickness of the diamond plate determined,
At that time, the amount of displacement in the width direction of the striped steel plate within the sampling time during the thickness measurement is detected, and if the amount of displacement is smaller than a preset threshold value, it is affected by the displacement in the steel plate width direction. Data
The preset threshold is an X-ray or γ-ray field width,
Thickness measurement of a striped steel plate characterized by calculating a displacement in the steel plate width direction based on the edge position in the steel plate width direction detected from the full width plate thickness profile data at every measurement cycle for measuring the thickness of the striped steel plate Method.

（２）熱間圧延機で圧延して得られた縞鋼板の板厚をオンラインで測定する縞鋼板の板厚測定方法であって、
前記熱間圧延機の出側に縞鋼板全幅の板厚を同時測定可能な多チャンネルタイプのＸ線板厚計またはγ線板厚計からなる板厚計を設置し、前記板厚計で縞鋼板の全幅板厚プロファイルデータを測定し、前記全幅板厚プロファイルデータのうち鋼板幅方向の変位の影響を受けていないデータのみを抽出して縞鋼板の板厚を求め、
その際に、板厚測定の際のサンプリング時間内における縞鋼板の幅方向の変位量を検出し、その変位量があらかじめ設定された閾値よりも小さい場合に、鋼板幅方向の変位の影響を受けていないデータとみなし、
前記あらかじめ設定された閾値は、Ｘ線またはγ線の視野幅であり、
縞鋼板の板厚を測定する測定周期ごとに前記全幅板厚プロファイルデータから検出した鋼板幅方向のエッジ位置から算出した鋼板幅方向のセンタ位置を元に、鋼板幅方向の変位を算出することを特徴とする縞鋼板の板厚測定方法。 (2) A method for measuring the thickness of a striped steel plate obtained by online measuring the thickness of a striped steel plate obtained by rolling with a hot rolling mill,
Installed on the outlet side of the hot rolling mill is a multi-channel type X-ray thickness gauge or γ-ray thickness gauge capable of simultaneously measuring the thickness of the full width of the striped steel sheet. Measure the full width plate thickness profile data of the steel sheet, extract only the data that is not affected by the displacement in the steel plate width direction among the full width plate thickness profile data to obtain the plate thickness of the striped steel sheet,
At that time, the amount of displacement in the width direction of the striped steel plate within the sampling time during the thickness measurement is detected, and if the amount of displacement is smaller than a preset threshold value, it is affected by the displacement in the steel plate width direction. Data
The preset threshold is an X-ray or γ-ray field width,
Calculating the displacement in the steel plate width direction based on the center position in the steel plate width direction calculated from the edge position in the steel plate width direction detected from the full width plate thickness profile data for each measurement cycle for measuring the plate thickness of the striped steel plate. A method for measuring the thickness of a striped steel sheet.

（３）熱間圧延機で圧延して得られた縞鋼板の板厚をオンラインで測定する縞鋼板の板厚測定方法であって、
前記熱間圧延機の出側に縞鋼板全幅の板厚を同時測定可能な多チャンネルタイプのＸ線板厚計またはγ線板厚計からなる板厚計を設置し、前記板厚計で縞鋼板の全幅板厚プロファイルデータを測定し、前記全幅板厚プロファイルデータのうち鋼板幅方向の変位の影響を受けていないデータのみを抽出して縞鋼板の板厚を求め、
その際に、板厚測定の際のサンプリング時間内における縞鋼板の幅方向の変位量を検出し、その変位量があらかじめ設定された閾値よりも小さい場合に、鋼板幅方向の変位の影響を受けていないデータとみなし、
前記あらかじめ設定された閾値は、Ｘ線またはγ線の視野幅であり、
縞鋼板の板厚を測定する測定周期ごとに前記全幅板厚プロファイルデータから検出した鋼板幅方向のエッジ位置と、エッジ位置から算出した鋼板幅方向のセンタ位置とを元に、鋼板幅方向の変位を算出することを特徴とする縞鋼板の板厚測定方法。 (3) A method for measuring the thickness of a striped steel plate obtained by rolling online with a hot rolling mill, wherein the thickness of the striped steel plate is measured online.
Installed on the outlet side of the hot rolling mill is a multi-channel type X-ray thickness gauge or γ-ray thickness gauge capable of simultaneously measuring the thickness of the full width of the striped steel sheet. Measure the full width plate thickness profile data of the steel sheet, extract only the data that is not affected by the displacement in the steel plate width direction among the full width plate thickness profile data to obtain the plate thickness of the striped steel sheet,
At that time, the amount of displacement in the width direction of the striped steel plate within the sampling time during the thickness measurement is detected, and if the amount of displacement is smaller than a preset threshold value, it is affected by the displacement in the steel plate width direction. Data
The preset threshold is an X-ray or γ-ray field width,
Displacement in the steel plate width direction based on the edge position in the steel plate width direction detected from the full width plate thickness profile data and the center position in the steel plate width direction calculated from the edge position for each measurement cycle for measuring the thickness of the striped steel plate The thickness measuring method of the striped steel plate characterized by calculating

（４）熱間圧延機で圧延して得られた縞鋼板の板厚をオンラインで測定する縞鋼板の板厚測定装置であって、
前記熱間圧延機の出側に設置された、縞鋼板全幅の板厚を同時測定可能な多チャンネルタイプのＸ線板厚計またはγ線板厚計からなる板厚計と、
前記板厚計で縞鋼板の全幅板厚プロファイルデータを測定し、前記全幅板厚プロファイルデータのうち鋼板幅方向の変位の影響を受けていないデータのみを抽出して縞鋼板の板厚を求める演算処理部と
を有し、
前記演算処理部は、板厚測定の際のサンプリング時間内における縞鋼板の幅方向の変位量を検出し、その変位量があらかじめ設定された閾値よりも小さい場合に、鋼板幅方向の変位の影響を受けていないデータとみなし、
前記演算処理部において、前記あらかじめ設定された閾値は、Ｘ線またはγ線の視野幅であり、
かつ、前記演算処理部は、縞鋼板の板厚を測定する測定周期ごとに前記全幅板厚プロファイルデータから検出した鋼板幅方向のエッジ位置を元に、鋼板幅方向の変位を算出することを特徴とする縞鋼板の板厚測定装置。 (4) A striped steel plate thickness measuring device for measuring the striped steel plate thickness obtained by rolling with a hot rolling mill online.
A thickness meter comprising a multi-channel type X-ray thickness meter or a γ-ray thickness meter capable of simultaneously measuring the thickness of the full width striped steel plate installed on the outlet side of the hot rolling mill,
Calculating the full width plate thickness profile data of the striped steel sheet with the plate thickness meter, and extracting only the data not affected by the displacement in the steel plate width direction from the full width plate thickness profile data to obtain the strip thickness of the striped steel plate With processing part
Have
The arithmetic processing unit detects the amount of displacement in the width direction of the striped steel plate within the sampling time when measuring the plate thickness, and when the amount of displacement is smaller than a preset threshold value, the influence of the displacement in the steel plate width direction Is considered to be unreceived data,
In the arithmetic processing unit, the preset threshold is a field width of X-rays or γ-rays,
And the said arithmetic processing part calculates the displacement of a steel plate width direction based on the edge position of the steel plate width direction detected from the said full width plate thickness profile data for every measurement period which measures the plate thickness of a striped steel plate. An apparatus for measuring the thickness of a striped steel sheet.

（５）熱間圧延機で圧延して得られた縞鋼板の板厚をオンラインで測定する縞鋼板の板厚測定装置であって、
前記熱間圧延機の出側に設置された、縞鋼板全幅の板厚を同時測定可能な多チャンネルタイプのＸ線板厚計またはγ線板厚計からなる板厚計と、
前記板厚計で縞鋼板の全幅板厚プロファイルデータを測定し、前記全幅板厚プロファイルデータのうち鋼板幅方向の変位の影響を受けていないデータのみを抽出して縞鋼板の板厚を求める演算処理部と
を有し、
前記演算処理部は、板厚測定の際のサンプリング時間内における縞鋼板の幅方向の変位量を検出し、その変位量があらかじめ設定された閾値よりも小さい場合に、鋼板幅方向の変位の影響を受けていないデータとみなし、
前記演算処理部において、前記あらかじめ設定された閾値は、Ｘ線またはγ線の視野幅であり、
かつ、前記演算処理部は、縞鋼板の板厚を測定する測定周期ごとに前記全幅板厚プロファイルデータから検出した鋼板幅方向のエッジ位置から算出した鋼板幅方向のセンタ位置を元に、鋼板幅方向の変位を算出することを特徴とする縞鋼板の板厚測定装置。 (5) A striped steel plate thickness measuring device for measuring the strip thickness of a striped steel plate obtained by rolling with a hot rolling mill online,
A thickness meter comprising a multi-channel type X-ray thickness meter or a γ-ray thickness meter capable of simultaneously measuring the thickness of the full width striped steel plate installed on the outlet side of the hot rolling mill,
Calculating the full width plate thickness profile data of the striped steel sheet with the plate thickness meter, and extracting only the data not affected by the displacement in the steel plate width direction from the full width plate thickness profile data to obtain the strip thickness of the striped steel plate With processing part
Have
The arithmetic processing unit detects the amount of displacement in the width direction of the striped steel plate within the sampling time when measuring the plate thickness, and when the amount of displacement is smaller than a preset threshold value, the influence of the displacement in the steel plate width direction Is considered to be unreceived data,
In the arithmetic processing unit, the preset threshold is a field width of X-rays or γ-rays,
And the said arithmetic processing part is based on the steel plate width direction center position computed from the edge position of the steel plate width direction detected from the said full width plate thickness profile data for every measurement cycle which measures the plate thickness of a striped steel plate. An apparatus for measuring the thickness of a striped steel sheet, characterized by calculating a displacement in a direction.

（６）熱間圧延機で圧延して得られた縞鋼板の板厚をオンラインで測定する縞鋼板の板厚測定装置であって、
前記熱間圧延機の出側に設置された、縞鋼板全幅の板厚を同時測定可能な多チャンネルタイプのＸ線板厚計またはγ線板厚計からなる板厚計と、
前記板厚計で縞鋼板の全幅板厚プロファイルデータを測定し、前記全幅板厚プロファイルデータのうち鋼板幅方向の変位の影響を受けていないデータのみを抽出して縞鋼板の板厚を求める演算処理部と
を有し、
前記演算処理部は、板厚測定の際のサンプリング時間内における縞鋼板の幅方向の変位量を検出し、その変位量があらかじめ設定された閾値よりも小さい場合に、鋼板幅方向の変位の影響を受けていないデータとみなし、
前記演算処理部において、前記あらかじめ設定された閾値は、Ｘ線またはγ線の視野幅であり、
かつ、前記演算処理部は、縞鋼板の板厚を測定する測定周期ごとに前記全幅板厚プロファイルデータから検出した鋼板幅方向のエッジ位置と、エッジ位置から算出した鋼板幅方向のセンタ位置とを元に、鋼板幅方向の変位を算出することを特徴とする縞鋼板の板厚測定装置。 (6) A striped steel plate thickness measuring device for measuring the striped steel plate thickness obtained by rolling with a hot rolling mill online.
A thickness meter comprising a multi-channel type X-ray thickness meter or a γ-ray thickness meter capable of simultaneously measuring the thickness of the full width striped steel plate installed on the outlet side of the hot rolling mill,
Calculating the full width plate thickness profile data of the striped steel sheet with the plate thickness meter, and extracting only the data not affected by the displacement in the steel plate width direction from the full width plate thickness profile data to obtain the strip thickness of the striped steel plate With processing part
Have
The arithmetic processing unit detects the amount of displacement in the width direction of the striped steel plate within the sampling time when measuring the plate thickness, and when the amount of displacement is smaller than a preset threshold value, the influence of the displacement in the steel plate width direction Is considered to be unreceived data,
In the arithmetic processing unit, the preset threshold is a field width of X-rays or γ-rays,
And the said arithmetic processing part is the edge position of the steel plate width direction detected from the said full width plate thickness profile data for every measurement period which measures the plate | board thickness of a striped steel plate, and the center position of the steel plate width direction calculated from the edge position. Originally, the thickness measuring apparatus of a striped steel plate which calculates the displacement of a steel plate width direction is characterized.

本発明によれば、縞鋼板の全幅の板厚を同時測定可能な多チャンネルタイプの板厚計を用いるので、板幅計を用いることなく、板厚計単体で、縞鋼板の全幅にわたって板厚のオンライン測定を行うことができる。また、板厚計で縞鋼板の全幅板厚プロファイルデータを測定し、全幅板厚プロファイルデータのうち鋼板幅方向の変位の影響を受けていないデータのみを抽出して縞鋼板の板厚を求めるので、蛇行等による鋼板幅方向の変位が生じても、測定精度低下が生じることなく高精度で縞鋼板の板厚を測定することができる。   According to the present invention, since a multi-channel type thickness gauge capable of simultaneously measuring the thickness of the full width of the striped steel plate is used, the thickness of the strip thickness steel plate alone, without using the thickness meter, over the entire width of the striped steel plate Online measurements can be made. In addition, the full width plate thickness profile data of the striped steel plate is measured with a plate thickness meter, and only the data that is not affected by the displacement in the steel plate width direction is extracted from the full width plate thickness profile data to obtain the plate thickness of the striped steel plate. Even if a displacement in the width direction of the steel sheet occurs due to meandering or the like, the thickness of the striped steel sheet can be measured with high accuracy without causing a decrease in measurement accuracy.

本発明の一実施形態に係る縞鋼板の板厚測定方法が適用される板厚測定装置を備えた熱間圧延設備を示す概略図である。It is the schematic which shows the hot rolling equipment provided with the plate | board thickness measuring apparatus with which the plate | board thickness measuring method of the striped steel plate which concerns on one Embodiment of this invention is applied. 図１の熱間板厚設備に設けられた板厚測定装置の板厚計を示す概略図である。It is the schematic which shows the plate | board thickness meter of the plate | board thickness measuring apparatus provided in the hot plate | board thickness installation of FIG. 図２の板厚計により縞鋼板の板厚を測定している状態を説明するための図である。It is a figure for demonstrating the state which is measuring the plate | board thickness of a striped steel plate with the plate | board thickness meter of FIG. 蛇行等の横振れが存在しない場合と存在する場合における縞鋼板の突起部の板厚（縞高さ）と測定値との関係を説明するための図である。It is a figure for demonstrating the relationship between the board thickness (stripe height) and the measured value of the protrusion part of a striped steel plate in the case where there exists no lateral vibration, such as meandering. 本発明の一実施形態に係る縞鋼板の板厚測定方法を説明するための図である。It is a figure for demonstrating the plate | board thickness measuring method of the striped steel plate which concerns on one Embodiment of this invention. 比較例および本発明例について、突起部の高さ（平坦部と突起部との高低差）の測定値と実測値との比較結果を示す図である。It is a figure which shows the comparison result of the measured value of the height of a projection part (height difference of a flat part and a projection part), and an actual value about a comparative example and the example of this invention.

以下、添付図面を参照して本発明の実施の形態について説明する。
図１は、本発明の一実施形態に係る縞鋼板の板厚測定方法が適用される板厚測定装置を備えた熱間圧延設備を示す概略図である。この熱間圧延設備は、７台の仕上圧延機（Ｆ１〜Ｆ７）を備えた仕上圧延機群１０で圧延して得られた縞鋼板１を、ランナウトテーブル２０で冷却した後、巻取設備３０で巻取るものであり、仕上圧延機群１０の出側に板厚測定装置４０を有している。板厚測定装置４０は、板厚計５０と、板厚計５０からの測定信号を演算処理する演算処理部６０とを有している。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic view showing a hot rolling facility equipped with a plate thickness measuring device to which a strip thickness measuring method for a striped steel plate according to an embodiment of the present invention is applied. In this hot rolling facility, after the striped steel plate 1 obtained by rolling with a finishing mill group 10 including seven finishing rolling mills (F1 to F7) is cooled by the runout table 20, the winding facility 30 is used. The sheet thickness measuring device 40 is provided on the exit side of the finish rolling mill group 10. The plate thickness measuring device 40 includes a plate thickness meter 50 and an arithmetic processing unit 60 that performs arithmetic processing on the measurement signal from the plate thickness meter 50.

仕上圧延機群１０は、粗圧延機群によって粗圧延された鋼板を７台の仕上圧延機（Ｆ１〜Ｆ７）で仕上圧延して、適当な板厚の縞鋼板１を得るものであり、例えば、最終の仕上圧延機（Ｆ７）に溝付きロールを組み込んで凹凸形状の縞鋼板１を形成する。   The finish rolling mill group 10 is obtained by finishing and rolling the steel sheet roughly rolled by the rough rolling mill group with seven finishing mills (F1 to F7) to obtain a striped steel sheet 1 having an appropriate thickness. Then, a grooved roll is incorporated into the final finish rolling mill (F7) to form the uneven striped steel sheet 1.

板厚測定装置４０の板厚計５０は、Ｘ線板厚計として構成されており、図２にも示すように、Ｃフレーム５１と、Ｃフレーム５１の上側フレーム５１ａの内部に設けられたＸ線源５２と、Ｃフレーム５１の下側フレーム５１ｂの内部に設けられた検出部５３とを有し、縞鋼板１の全幅の板厚を同時測定可能な多チャンネルタイプとして構成されている。すなわち、検出部５３は板幅方向に配列された複数の検出器５４を有しており、図３に示すように、Ｘ線源５２から放射状に射出され、縞鋼板１を透過したＸ線が各検出器５４により検出され、これにより縞鋼板１の全幅同時に板厚測定可能となる。したがって、連続して通板される縞鋼板１の板厚プロファイルを全幅同時に測定することができる。検出部５３の各検出器５４は、所定のサンプリング時間内にサンプリングされたＸ線に基づいて板厚を計測する。なお、板厚計５０として、Ｘ線の代わりにγ線を用いたγ線板厚計を用いてもよい。   The plate thickness meter 50 of the plate thickness measuring device 40 is configured as an X-ray plate thickness meter, and as shown in FIG. 2, the X frame provided in the C frame 51 and the upper frame 51a of the C frame 51 is provided. It has a radiation source 52 and a detection unit 53 provided inside the lower frame 51b of the C frame 51, and is configured as a multi-channel type capable of simultaneously measuring the full thickness of the striped steel plate 1. That is, the detection unit 53 has a plurality of detectors 54 arranged in the plate width direction. As shown in FIG. 3, X-rays emitted radially from the X-ray source 52 and transmitted through the striped steel plate 1 Detected by each detector 54, the thickness of the striped steel plate 1 can be measured simultaneously. Therefore, it is possible to simultaneously measure the full thickness of the strip thickness profile of the striped steel plate 1 that is continuously passed. Each detector 54 of the detector 53 measures the plate thickness based on the X-rays sampled within a predetermined sampling time. As the thickness gauge 50, a γ-ray thickness gauge using γ rays instead of X rays may be used.

ところで、熱間圧延設備において、鋼板に蛇行やキャンバー等が生じて鋼板が幅方向に変位することがある（以下、横振れという）。縞鋼板の突起部の板厚を測定するにあたり、このような蛇行等による横振れが存在しない場合には、図４（ａ）に示すように、検出器５４のＸ線測定のためのサンプリング時間内において、Ｘ線視野に突起部が収まった状態で測定することができ、縞鋼板の突起部の板厚（縞高さ）を正確に測定することができるが、蛇行等による横振れが生じた場合には、図４（ｂ）に示すように、サンプリング時間内で、Ｘ線視野から突起部が外れてしまう場合が発生し、Ｘ線のサンプリング量が実際よりも少なくなって、測定した突起部の実際の板厚（縞高さ）よりも低く測定されてしまう。   By the way, in a hot rolling facility, meandering, a camber, etc. may arise in a steel plate, and a steel plate may be displaced to the width direction (henceforth a lateral shake). In measuring the plate thickness of the protruding portion of the striped steel plate, if there is no lateral vibration due to such meandering, the sampling time for the X-ray measurement of the detector 54 as shown in FIG. It can be measured with the projections in the X-ray field, and the thickness (stripe height) of the projections of the striped steel plate can be measured accurately, but lateral vibration due to meandering etc. occurs. In such a case, as shown in FIG. 4 (b), there was a case in which the protrusion part was detached from the X-ray field within the sampling time, and the X-ray sampling amount was smaller than the actual measurement. It is measured lower than the actual plate thickness (stripe height) of the protrusion.

すなわち、鋼板に蛇行等による横振れが生じていないときには縞鋼板の板厚プロファイルをオンラインで正確に測定することが可能であるが、蛇行等による横振れが生じている場合には、測定した縞鋼板の板厚プロファイルは、実際よりも平坦化して、突起部の板厚測定精度は低いものとなる。   That is, it is possible to accurately measure the thickness profile of a striped steel plate online when there is no lateral vibration due to meandering on the steel sheet. The plate thickness profile of the steel plate becomes flatter than the actual one, and the plate thickness measurement accuracy of the protrusions is low.

このため、縞鋼板の突起部の板厚を高精度で測定するためには、縞鋼板の蛇行等による横振れの影響を除外する必要がある。   For this reason, in order to measure the thickness of the protruding portion of the striped steel plate with high accuracy, it is necessary to exclude the influence of lateral vibration due to the meandering of the striped steel plate.

そこで、本実施形態では、所定値以上の横振れの影響を受けないようにするため、以下に説明するように、演算処理部６０において、蛇行等による横振れが所定の閾値よりも小さいデータのみを抽出する。   Therefore, in the present embodiment, in order to avoid the influence of the lateral shake exceeding the predetermined value, only the data in which the lateral shake due to meandering is smaller than the predetermined threshold is calculated in the arithmetic processing unit 60 as described below. To extract.

図５を参照して、その手法について説明する。
演算処理部６０では、板厚計５０の板幅方向に複数配列された検出器５４によりサンプリング時間単位ごとに測定された全幅板厚プロファイルＴ（ｘ、ｓ）の板厚変位から、図５（ａ）に示すように、幅方向における左右の鋼板エッジ位置Ｅｌ（ｓ）、Ｅｒ（ｓ）を検出し、これらのエッジ位置Ｅｌ（ｓ）、Ｅｒ（ｓ）に基づいて、鋼板センタ位置Ｃｅ（ｓ）をＣｅ（ｓ）＝｛Ｅｌ（ｓ）−Ｅｒ（ｓ）｝／２として計算する。ここで、ｘはライン幅方向における位置、ｓはサンプリングＮｏ．を示す。 The method will be described with reference to FIG.
In the arithmetic processing unit 60, from the plate thickness displacement of the full width plate thickness profile T (x, s) measured for each sampling time unit by a plurality of detectors 54 arranged in the plate width direction of the plate thickness meter 50, FIG. As shown in a), left and right steel plate edge positions El (s) and Er (s) in the width direction are detected, and based on these edge positions El (s) and Er (s), a steel plate center position Ce ( s) is calculated as Ce (s) = {El (s) −Er (s)} / 2. Here, x is a position in the line width direction, and s is a sampling number. Indicates.

このＣｅ（ｓ）に基づいて、サンプリング時間単位ごとの鋼板の蛇行等による横振れ量Ｍ（ｓ）＝Ｃｅ（ｓ）−Ｃｅ（ｓ−１）を求める。この横振れ量Ｍ（ｓ）を検出器のＸ線視野幅αと比較する。図５（ｂ）に示すように、Ｘ線視野幅αよりも鋼板の蛇行等による横振れ量Ｍ（ｓ）が小さい場合は、サンプリング時間内においてＸ線視野に突起部が収まった状態で測定されたデータと判定することができ、一方、Ｘ線視野幅αよりも横振れ量Ｍ（ｓ）が大きい場合は、サンプリング時間内においてＸ線視野幅から突起部が外れた測定データと判定することができる。一般的に、鋼板の蛇行等による横振れは、鋼板が幅方向の片側方向のみではなく、両側方向に移動するため、必ず横振れのない部分が発生する。このため、少なくとも１か所でサンプリング時間内においてＸ線視野に突起部が収まった状態で測定されたデータを得ることができる。したがって、横振れ量Ｍ（ｓ）とＸ線視野幅αを比較して、蛇行等の横振れの影響があるα≦Ｍ（ｓ）のデータを除外し、蛇行等の横振れの影響を受けていないとみなせるα＞Ｍ（ｓ）のデータのみを抽出する。これにより、鋼板に蛇行等の横振れが生じても、高精度の板厚測定を実現することができる。   Based on this Ce (s), the lateral deflection amount M (s) = Ce (s) −Ce (s−1) due to the meandering of the steel sheet for each sampling time unit is obtained. This lateral shake amount M (s) is compared with the X-ray field width α of the detector. As shown in FIG. 5 (b), when the lateral vibration amount M (s) due to the meandering of the steel sheet is smaller than the X-ray field width α, the measurement is performed with the projections within the X-ray field within the sampling time. On the other hand, when the lateral shake amount M (s) is larger than the X-ray field width α, it is determined as measurement data in which the protruding portion is out of the X-ray field width within the sampling time. be able to. In general, the lateral vibration due to the meandering of the steel sheet is not necessarily caused by the lateral vibration because the steel sheet moves not only in one side of the width direction but also in both directions. For this reason, it is possible to obtain data measured in a state in which the protrusions are contained in the X-ray field within at least one place within the sampling time. Therefore, by comparing the lateral shake amount M (s) and the X-ray field width α, the data of α ≦ M (s) having the influence of the lateral shake such as meandering is excluded, and the influence of the lateral shake such as the meandering is excluded. Only data of α> M (s) that can be regarded as not being extracted are extracted. As a result, even when a lateral vibration such as meandering occurs in the steel plate, it is possible to realize a highly accurate plate thickness measurement.

以上のように、本実施形態によれば、縞鋼板の全幅の板厚を同時測定可能な多チャンネルタイプの板厚計を用いるので、板幅計を用いることなく、板厚計単体で、縞鋼板の全幅にわたって板厚のオンライン測定を行うことができる。また、板厚計で縞鋼板の全幅板厚プロファイルデータを測定し、全幅板厚プロファイルデータのうち鋼板の蛇行等による横振れの影響を受けているデータを除外し、横振れの影響を受けていないデータのみを抽出して縞鋼板の板厚を求めるので、蛇行等による横振れが生じても、測定精度低下が生じることなく高精度で縞鋼板の板厚を測定することができる。   As described above, according to the present embodiment, since the multi-channel type thickness gauge capable of simultaneously measuring the thickness of the full width of the striped steel plate is used, the strip thickness meter alone is used without using the width meter. Online thickness measurement can be performed across the full width of the steel sheet. In addition, the full width plate thickness profile data of the striped steel plate is measured with a plate thickness meter, and the data affected by the horizontal runout due to the meandering of the steel plate etc. is excluded from the full width plate thickness profile data. Since only the missing data is extracted and the plate thickness of the striped steel plate is obtained, the plate thickness of the striped steel plate can be measured with high accuracy without causing a reduction in measurement accuracy even if lateral vibration due to meandering or the like occurs.

なお、本発明は上記実施形態に限定されることなく種々変形が可能である。例えば上記実施形態では、横振れ量を把握するために、鋼板センタ位置Ｃｅ（ｓ）を用いたが、幅板厚プロファイルの板厚変位から検出した鋼板エッジ位置Ｅｌ（ｓ）、Ｅｒ（ｓ）をそのまま用いてもよく、センタ位置とエッジ位置の両方を同時に用いてもよい。また、横振れの閾値としてＸ線視野幅αを用いたが、これに限るものではない。   The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, in the above embodiment, the steel plate center position Ce (s) is used to grasp the lateral runout amount. However, the steel plate edge positions El (s) and Er (s) detected from the plate thickness displacement of the width plate thickness profile. May be used as they are, or both the center position and the edge position may be used simultaneously. In addition, although the X-ray field width α is used as the lateral shake threshold, the present invention is not limited to this.

さらに、上記実施形態では、多チャンネル板厚計の光源が一つの場合について示したが、光源が複数であってもよい。さらにまた、上記実施形態では、多チャンネルの板厚計としてＸ線板厚計またはγ線板厚計を用いた場合を示したが、これに限らずレーザー板厚計等の他の板厚計を用いることもできる。   Furthermore, although the case where the number of light sources of the multi-channel plate thickness meter is one is shown in the above embodiment, a plurality of light sources may be used. Furthermore, in the above-described embodiment, the case where an X-ray thickness gauge or a γ-ray thickness gauge is used as a multi-channel thickness gauge is shown, but not limited to this, other thickness gauges such as a laser thickness gauge are used. Can also be used.

以下、本発明の実施例について説明する。ここでは、Ｘ線視野幅が４ｍｍであり、全幅同時に板厚測定可能な多チャンネルタイプのＸ線板厚計を使用し、突起部の幅４〜２０ｍｍの縞鋼板を板厚測定した。板厚測定は、鋼板の蛇行等による横振れの影響を考慮せずに全てのデータを用いた比較例と、横振れの影響を受けていないデータのみを抽出した本発明例とにより行った。図６は、比較例および本発明例について、突起部の高さ（平坦部と突起部との高低差）の測定値と実測値との比較結果を示す図である。   Examples of the present invention will be described below. Here, an X-ray field width was 4 mm, and a multi-channel type X-ray thickness meter capable of measuring the thickness at the same time for the entire width was used to measure the thickness of a striped steel plate having a protrusion width of 4 to 20 mm. The plate thickness measurement was performed by a comparative example using all data without considering the influence of the lateral vibration due to the meandering of the steel sheet and the example of the present invention in which only the data not affected by the lateral vibration was extracted. FIG. 6 is a diagram showing a comparison result between a measured value and an actually measured value of the height of the protrusion (the height difference between the flat portion and the protrusion) in the comparative example and the example of the present invention.

図６に示すように、蛇行等の横振れの影響を除外していない比較例では、実測値との偏差平均は−１３５２μｍと誤差が大きく、標準偏差も６７６μｍと大きかった。一方、本発明に従って蛇行による横振れが大きいデータを除外して、横振れの影響がないデータのみを抽出した本発明例では、実測値に対しての偏差平均は−８μｍとなり誤差を小さくすることができ、標準偏差も３７０μｍとなった。なお、ここでは、検出されたエッジ位置から算出した板幅測定値と目標板幅値から許容偏差範囲にあるかを判定することによりさらなる精度向上を図った。   As shown in FIG. 6, in the comparative example in which the influence of lateral vibration such as meandering is not excluded, the deviation average from the actual measurement value is as large as −1352 μm, and the standard deviation is also large as 676 μm. On the other hand, in the example of the present invention in which only data that is not affected by lateral vibration is extracted by excluding data with large lateral vibration due to meandering according to the present invention, the deviation average with respect to the actual measurement value is −8 μm, and the error is reduced. The standard deviation was 370 μm. Here, the accuracy was further improved by determining whether the value is within the allowable deviation range from the plate width measurement value calculated from the detected edge position and the target plate width value.

以上の結果から、蛇行等の横振れの影響を受けていないデータのみを自動的に抽出することで、横振れが生じても測定精度を低下させずに縞鋼板の板厚をオンライン測定できることが確認された。   Based on the above results, by automatically extracting only the data that is not affected by lateral vibration such as meandering, the thickness of the striped steel plate can be measured online without reducing the measurement accuracy even if lateral vibration occurs. confirmed.

１ 縞鋼板
１０ 仕上圧延機群
２０ ランナウトテーブル
３０ 巻取設備
４０ 板厚測定装置
５０ 板厚計
５１ Ｃフレーム
５２ Ｘ線源
５３ 検出部
５４ 検出器
６０ 演算処理部 DESCRIPTION OF SYMBOLS 1 Striped steel plate 10 Finishing rolling mill group 20 Runout table 30 Winding equipment 40 Plate thickness measuring device 50 Plate thickness meter 51 C frame 52 X-ray source 53 Detector 54 Detector 60 Arithmetic processor

Claims (6)

熱間圧延機で圧延して得られた縞鋼板の板厚をオンラインで測定する縞鋼板の板厚測定方法であって、
前記熱間圧延機の出側に縞鋼板全幅の板厚を同時測定可能な多チャンネルタイプのＸ線板厚計またはγ線板厚計からなる板厚計を設置し、前記板厚計で縞鋼板の全幅板厚プロファイルデータを測定し、前記全幅板厚プロファイルデータのうち鋼板幅方向の変位の影響を受けていないデータのみを抽出して縞鋼板の板厚を求め、
その際に、板厚測定の際のサンプリング時間内における縞鋼板の幅方向の変位量を検出し、その変位量があらかじめ設定された閾値よりも小さい場合に、鋼板幅方向の変位の影響を受けていないデータとみなし、
前記あらかじめ設定された閾値は、Ｘ線またはγ線の視野幅であり、
縞鋼板の板厚を測定する測定周期ごとに前記全幅板厚プロファイルデータから検出した鋼板幅方向のエッジ位置を元に、鋼板幅方向の変位を算出することを特徴とする縞鋼板の板厚測定方法。 A method for measuring the thickness of a striped steel sheet obtained by rolling on a hot rolling mill online,
Installed on the outlet side of the hot rolling mill is a multi-channel type X-ray thickness gauge or γ-ray thickness gauge capable of simultaneously measuring the thickness of the full width of the striped steel sheet. the overall width thickness profile data of the steel sheet was measured, the total width thickness profile data which is not affected by the steel plate width direction of displacement of the data only extract and Me the thickness of the diamond plate determined,
At that time, the amount of displacement in the width direction of the striped steel plate within the sampling time during the thickness measurement is detected, and if the amount of displacement is smaller than a preset threshold value, it is affected by the displacement in the steel plate width direction. Data
The preset threshold is an X-ray or γ-ray field width,
Thickness measurement of a striped steel plate characterized by calculating a displacement in the steel plate width direction based on the edge position in the steel plate width direction detected from the full width plate thickness profile data at every measurement cycle for measuring the thickness of the striped steel plate Method. 熱間圧延機で圧延して得られた縞鋼板の板厚をオンラインで測定する縞鋼板の板厚測定方法であって、
前記熱間圧延機の出側に縞鋼板全幅の板厚を同時測定可能な多チャンネルタイプのＸ線板厚計またはγ線板厚計からなる板厚計を設置し、前記板厚計で縞鋼板の全幅板厚プロファイルデータを測定し、前記全幅板厚プロファイルデータのうち鋼板幅方向の変位の影響を受けていないデータのみを抽出して縞鋼板の板厚を求め、
その際に、板厚測定の際のサンプリング時間内における縞鋼板の幅方向の変位量を検出し、その変位量があらかじめ設定された閾値よりも小さい場合に、鋼板幅方向の変位の影響を受けていないデータとみなし、
前記あらかじめ設定された閾値は、Ｘ線またはγ線の視野幅であり、
縞鋼板の板厚を測定する測定周期ごとに前記全幅板厚プロファイルデータから検出した鋼板幅方向のエッジ位置から算出した鋼板幅方向のセンタ位置を元に、鋼板幅方向の変位を算出することを特徴とする縞鋼板の板厚測定方法。 A method for measuring the thickness of a striped steel sheet obtained by rolling on a hot rolling mill online,
Installed on the outlet side of the hot rolling mill is a multi-channel type X-ray thickness gauge or γ-ray thickness gauge capable of simultaneously measuring the thickness of the full width of the striped steel sheet. Measure the full width plate thickness profile data of the steel sheet, extract only the data that is not affected by the displacement in the steel plate width direction among the full width plate thickness profile data to obtain the plate thickness of the striped steel sheet,
At that time, the amount of displacement in the width direction of the striped steel plate within the sampling time during the thickness measurement is detected, and if the amount of displacement is smaller than a preset threshold value, it is affected by the displacement in the steel plate width direction. Data
The preset threshold is an X-ray or γ-ray field width,
Calculating the displacement in the steel plate width direction based on the center position in the steel plate width direction calculated from the edge position in the steel plate width direction detected from the full width plate thickness profile data for each measurement cycle for measuring the plate thickness of the striped steel plate. thickness measurement method of diamond plate characterized. 熱間圧延機で圧延して得られた縞鋼板の板厚をオンラインで測定する縞鋼板の板厚測定方法であって、
前記熱間圧延機の出側に縞鋼板全幅の板厚を同時測定可能な多チャンネルタイプのＸ線板厚計またはγ線板厚計からなる板厚計を設置し、前記板厚計で縞鋼板の全幅板厚プロファイルデータを測定し、前記全幅板厚プロファイルデータのうち鋼板幅方向の変位の影響を受けていないデータのみを抽出して縞鋼板の板厚を求め、
その際に、板厚測定の際のサンプリング時間内における縞鋼板の幅方向の変位量を検出し、その変位量があらかじめ設定された閾値よりも小さい場合に、鋼板幅方向の変位の影響を受けていないデータとみなし、
前記あらかじめ設定された閾値は、Ｘ線またはγ線の視野幅であり、
縞鋼板の板厚を測定する測定周期ごとに前記全幅板厚プロファイルデータから検出した鋼板幅方向のエッジ位置と、エッジ位置から算出した鋼板幅方向のセンタ位置とを元に、鋼板幅方向の変位を算出することを特徴とする縞鋼板の板厚測定方法。 A method for measuring the thickness of a striped steel sheet obtained by rolling on a hot rolling mill online,
Installed on the outlet side of the hot rolling mill is a multi-channel type X-ray thickness gauge or γ-ray thickness gauge capable of simultaneously measuring the thickness of the full width of the striped steel sheet. Measure the full width plate thickness profile data of the steel sheet, extract only the data that is not affected by the displacement in the steel plate width direction among the full width plate thickness profile data to obtain the plate thickness of the striped steel sheet,
At that time, the amount of displacement in the width direction of the striped steel plate within the sampling time during the thickness measurement is detected, and if the amount of displacement is smaller than a preset threshold value, it is affected by the displacement in the steel plate width direction. Data
The preset threshold is an X-ray or γ-ray field width,
Displacement in the steel plate width direction based on the edge position in the steel plate width direction detected from the full width plate thickness profile data and the center position in the steel plate width direction calculated from the edge position for each measurement cycle for measuring the thickness of the striped steel plate thickness measurement method of diamond plate you and calculates. 熱間圧延機で圧延して得られた縞鋼板の板厚をオンラインで測定する縞鋼板の板厚測定装置であって、
前記熱間圧延機の出側に設置された、縞鋼板全幅の板厚を同時測定可能な多チャンネルタイプのＸ線板厚計またはγ線板厚計からなる板厚計と、
前記板厚計で縞鋼板の全幅板厚プロファイルデータを測定し、前記全幅板厚プロファイルデータのうち鋼板幅方向の変位の影響を受けていないデータのみを抽出して縞鋼板の板厚を求める演算処理部と
を有し、
前記演算処理部は、板厚測定の際のサンプリング時間内における縞鋼板の幅方向の変位量を検出し、その変位量があらかじめ設定された閾値よりも小さい場合に、鋼板幅方向の変位の影響を受けていないデータとみなし、
前記演算処理部において、前記あらかじめ設定された閾値は、Ｘ線またはγ線の視野幅であり、
かつ、前記演算処理部は、縞鋼板の板厚を測定する測定周期ごとに前記全幅板厚プロファイルデータから検出した鋼板幅方向のエッジ位置を元に、鋼板幅方向の変位を算出することを特徴とする縞鋼板の板厚測定装置。 A strip thickness measuring device for striped steel sheets that measures the thickness of striped steel sheets obtained by rolling with a hot rolling mill online.
A thickness meter comprising a multi-channel type X-ray thickness meter or a γ-ray thickness meter capable of simultaneously measuring the thickness of the full width striped steel plate installed on the outlet side of the hot rolling mill,
Calculating the full width plate thickness profile data of the striped steel sheet with the plate thickness meter, and extracting only the data not affected by the displacement in the steel plate width direction from the full width plate thickness profile data to obtain the strip thickness of the striped steel plate possess a processing unit,
The arithmetic processing unit detects the amount of displacement in the width direction of the striped steel plate within the sampling time when measuring the plate thickness, and when the amount of displacement is smaller than a preset threshold value, the influence of the displacement in the steel plate width direction Is considered to be unreceived data,
In the arithmetic processing unit, the preset threshold is a field width of X-rays or γ-rays,
And the said arithmetic processing part calculates the displacement of a steel plate width direction based on the edge position of the steel plate width direction detected from the said full width plate thickness profile data for every measurement period which measures the plate thickness of a striped steel plate. An apparatus for measuring the thickness of a striped steel sheet. 熱間圧延機で圧延して得られた縞鋼板の板厚をオンラインで測定する縞鋼板の板厚測定装置であって、
前記熱間圧延機の出側に設置された、縞鋼板全幅の板厚を同時測定可能な多チャンネルタイプのＸ線板厚計またはγ線板厚計からなる板厚計と、
前記板厚計で縞鋼板の全幅板厚プロファイルデータを測定し、前記全幅板厚プロファイルデータのうち鋼板幅方向の変位の影響を受けていないデータのみを抽出して縞鋼板の板厚を求める演算処理部と
を有し、
前記演算処理部は、板厚測定の際のサンプリング時間内における縞鋼板の幅方向の変位量を検出し、その変位量があらかじめ設定された閾値よりも小さい場合に、鋼板幅方向の変位の影響を受けていないデータとみなし、
前記演算処理部において、前記あらかじめ設定された閾値は、Ｘ線またはγ線の視野幅であり、
かつ、前記演算処理部は、縞鋼板の板厚を測定する測定周期ごとに前記全幅板厚プロファイルデータから検出した鋼板幅方向のエッジ位置から算出した鋼板幅方向のセンタ位置を元に、鋼板幅方向の変位を算出することを特徴とする縞鋼板の板厚測定装置。 A strip thickness measuring device for striped steel sheets that measures the thickness of striped steel sheets obtained by rolling with a hot rolling mill online.
A thickness meter comprising a multi-channel type X-ray thickness meter or a γ-ray thickness meter capable of simultaneously measuring the thickness of the full width striped steel plate installed on the outlet side of the hot rolling mill,
Calculating the full width plate thickness profile data of the striped steel sheet with the plate thickness meter, and extracting only the data not affected by the displacement in the steel plate width direction from the full width plate thickness profile data to obtain the strip thickness of the striped steel plate With processing part
Have
The arithmetic processing unit detects the amount of displacement in the width direction of the striped steel plate within the sampling time when measuring the plate thickness, and when the amount of displacement is smaller than a preset threshold value, the influence of the displacement in the steel plate width direction Is considered to be unreceived data,
In the arithmetic processing unit, the preset threshold is a field width of X-rays or γ-rays,
And the said arithmetic processing part is based on the steel plate width direction center position computed from the edge position of the steel plate width direction detected from the said full width plate thickness profile data for every measurement cycle which measures the plate thickness of a striped steel plate. thickness measuring apparatus diamond plate you and calculates the direction of displacement. 熱間圧延機で圧延して得られた縞鋼板の板厚をオンラインで測定する縞鋼板の板厚測定装置であって、
前記熱間圧延機の出側に設置された、縞鋼板全幅の板厚を同時測定可能な多チャンネルタイプのＸ線板厚計またはγ線板厚計からなる板厚計と、
前記板厚計で縞鋼板の全幅板厚プロファイルデータを測定し、前記全幅板厚プロファイルデータのうち鋼板幅方向の変位の影響を受けていないデータのみを抽出して縞鋼板の板厚を求める演算処理部と
を有し、
前記演算処理部は、板厚測定の際のサンプリング時間内における縞鋼板の幅方向の変位量を検出し、その変位量があらかじめ設定された閾値よりも小さい場合に、鋼板幅方向の変位の影響を受けていないデータとみなし、
前記演算処理部において、前記あらかじめ設定された閾値は、Ｘ線またはγ線の視野幅であり、
かつ、前記演算処理部は、縞鋼板の板厚を測定する測定周期ごとに前記全幅板厚プロファイルデータから検出した鋼板幅方向のエッジ位置と、エッジ位置から算出した鋼板幅方向のセンタ位置とを元に、鋼板幅方向の変位を算出することを特徴とする縞鋼板の板厚測定装置。 A strip thickness measuring device for striped steel sheets that measures the thickness of striped steel sheets obtained by rolling with a hot rolling mill online.
A thickness meter comprising a multi-channel type X-ray thickness meter or a γ-ray thickness meter capable of simultaneously measuring the thickness of the full width striped steel plate installed on the outlet side of the hot rolling mill,
Calculating the full width plate thickness profile data of the striped steel sheet with the plate thickness meter, and extracting only the data not affected by the displacement in the steel plate width direction from the full width plate thickness profile data to obtain the strip thickness of the striped steel plate With processing part
Have
The arithmetic processing unit detects the amount of displacement in the width direction of the striped steel plate within the sampling time when measuring the plate thickness, and when the amount of displacement is smaller than a preset threshold value, the influence of the displacement in the steel plate width direction Is considered to be unreceived data,
In the arithmetic processing unit, the preset threshold is a field width of X-rays or γ-rays,
And the said arithmetic processing part is the edge position of the steel plate width direction detected from the said full width plate thickness profile data for every measurement period which measures the plate | board thickness of a striped steel plate, and the center position of the steel plate width direction calculated from the edge position. based on the plate thickness measuring apparatus diamond plate you and calculates the displacement of the steel sheet width direction.
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