JP4818878B2 - Method and apparatus for measuring elongation of metal plate - Google Patents

Method and apparatus for measuring elongation of metal plate Download PDF

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JP4818878B2
JP4818878B2 JP2006295102A JP2006295102A JP4818878B2 JP 4818878 B2 JP4818878 B2 JP 4818878B2 JP 2006295102 A JP2006295102 A JP 2006295102A JP 2006295102 A JP2006295102 A JP 2006295102A JP 4818878 B2 JP4818878 B2 JP 4818878B2
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謙嗣 空尾
裕朗 羽田野
幸一 藤平
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Nippon Steel Corp
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本発明は、金属板を被圧延材とする圧延機やテンションレベラー等の圧延加工機の入側および出側の測長ロールによって、金属板の伸び率を測定する場合における伸び率演算方法及び装置に関し、特に時間応答性が高く、高精度な伸び率計測方法及び装置に関するものである。     The present invention relates to an elongation rate calculation method and apparatus in the case of measuring the elongation rate of a metal plate by measuring rolls on the entry side and the exit side of a rolling machine such as a rolling mill or a tension leveler that uses the metal plate as a material to be rolled. In particular, the present invention relates to a highly accurate elongation rate measuring method and apparatus with high time response.

例えば、金属加工の一つである、鋼板を圧延する際に、圧延機前後での鋼板の伸び率を計測方法としては、圧延機やテンションレベラー等の鋼板圧延加工機の入側及び出側に、鋼板と密着して回転する入側測長ロールおよび出側測長ロールを設置し、各測長ロールに接続されたパルス発生器から一定の回転角度ごとに出力されるパルス信号を用いて測定されることが多い。すなわち、入側において鋼板が入側測長ロールから一定距離送り出される毎に、その送出期間中に出側測長ロールを通過する鋼板長さを検出し、それら値に基づいて次式にて伸び率εを算出している。

ε＝（ｌＤ−ｌＥ）／ｌＥ×１００ ［％］ ・・・ （１）

ここで、εは鋼板の伸び率、ｌＥは上記入側測長ロールに取付けられたパルス発生器により、あらかじめ設定された距離分入側鋼板が走行したことを検出した際の長さ計測値、ｌＤはｌＥを測定した際に出側測長ロールに取付けられたパルス発生器により測定された出側鋼板の走行距離である。
また、(1)式を用いる方法においては、誤差として1パルス分に対応する誤差を避けることができないため、ｌＥを大きくすることで伸び率測定誤差を小さくする必要がある。しかしながら、それに伴って計測に必要な送り出し距離が長く、即ち伸び率計測周期が長くなり、測定系の時間応答性が悪くなるという問題点があった。 For example, when rolling a steel sheet, which is one of the metal processing, as a method of measuring the elongation rate of the steel sheet before and after the rolling mill, on the entry side and the exit side of the steel sheet rolling machine such as a rolling mill or a tension leveler. Measured using pulse signals output at fixed rotation angles from a pulse generator connected to each length measuring roll by installing an input length measuring roll and an output length measuring roll that rotate in close contact with the steel plate. Often done. That is, every time a steel sheet is fed out from the entrance length measuring roll at a certain distance on the entry side, the length of the steel sheet passing through the exit length measurement roll is detected during the delivery period, and the length is extended by the following formula based on those values. The rate ε is calculated.

ε = (l D −l E ) / l E × 100 [%] (1)

Here, ε is the elongation percentage of the steel sheet, and l E is the length measurement value when it is detected that the distance-incoming steel sheet has traveled by a predetermined distance by the pulse generator attached to the entrance-side length measuring roll. , L D is the travel distance of the outgoing side steel sheet measured by the pulse generator attached to the outgoing side length measuring roll when l E is measured.
Further, in the method using equation (1), it is not possible to avoid error corresponding to one pulse as an error, it is necessary to decrease the elongation measurement error by increasing the l E. However, in association with this, there is a problem that the feeding distance necessary for measurement is long, that is, the elongation measurement cycle is long, and the time responsiveness of the measurement system is deteriorated.

このような問題を解決する従来の方法としては、下記特許文献１に開示されていように、圧延速度に応じて伸び率測定周期が長くなる通板速度が低い際に、上記のような定距離カウント方式から、定時間カウント方式に切り替える技術が知られている。しかしながら、この定時間カウント方式は通板速度が低い場合、定時間にカウントされるパルス数が減少するので、１パルスあたりの測定誤差の重みが増加してしまうため、測定誤差が大きくなる可能性が高いという問題があった。
また、 下記特許文献２、特許文献３および特許文献４に開示されているように、伸び率制御における伸び率偏差や、実績伸び率、ライン速度等の状況に応じて伸び率測定距離を短くする技術が知られているが、これら方法では、特許文献１の技術と同様、伸び率測定距離を短くした場合に測定誤差が大きくなる可能性が高いという問題があった。
特開昭６０−１４８６１２号公報 特開平７−１６６３４号公報 特開平６−１１３３９号公報 特開昭６０−１８０６１５号公報 As a conventional method for solving such a problem, as disclosed in the following Patent Document 1, when the sheet feeding speed at which the elongation measurement period becomes longer according to the rolling speed is low, the constant distance as described above is used. A technique for switching from a count method to a fixed time count method is known. However, with this constant time counting method, when the plate feed speed is low, the number of pulses counted at a constant time decreases, so the measurement error weight per pulse increases, and the measurement error may increase. There was a problem of high.
Further, as disclosed in the following Patent Document 2, Patent Document 3 and Patent Document 4, the elongation measurement distance is shortened according to the situation such as the elongation deviation in the elongation control, the actual elongation, the line speed, etc. Although techniques are known, as in the technique of Patent Document 1, there is a problem that a measurement error is likely to increase when the elongation measurement distance is shortened.
JP-A-60-148612 Japanese Unexamined Patent Publication No. 7-16634 JP-A-6-11339 JP-A-60-180615

以上のような従来技術の問題点に鑑みて、本発明は、圧延機やテンションレベラー等の圧延加工機の入側および出側の測長ロールによって圧延金属板の伸び率を測定する場合における伸び率計測方法及び装置において、測長ロールの測定誤差に起因する伸び率測定誤差を可及的に小さく、時間応答性が高く伸び率を測定する技術を提供することを課題とする。     In view of the above-mentioned problems of the prior art, the present invention is an elongation in the case where the elongation rate of the rolled metal sheet is measured by the length measuring rolls on the entry side and the exit side of a rolling machine such as a rolling mill or a tension leveler. It is an object of the present invention to provide a technique for measuring an elongation rate by measuring an elongation rate with as little time as possible an elongation rate measurement error caused by a measurement error of a length measuring roll.

本発明の金属板の伸び率計測装置は、金属板を被圧延材とする圧延加工機の入側及び出側それぞれに入側測長ロール及び出側測長ロールを備えた、被圧延材の伸び率を求める伸び率計測装置において、前記入側測長ロールに接続されて該ロールの回転角度を検出する入側パルス発生手段と、前記出側測長ロールに接続されて該ロールの回転角度を検出する出側パルス発生手段と、前記入側パルス発生手段からの出力信号を基に入側測長ロールの回転速度を演算する入側ロール回転速度演算手段と、前記出側パルス発生手段からの出力信号を基に出側測長ロールの回転速度を演算する出側ロール回転速度演算手段と前記入側および出側測長ロール回転速度演算手段から出力される回転速度信号を用いて瞬時的な伸び率を演算する瞬時伸び率演算手段と、前記入側および出側パルス発生手段からのパルス出力を用いて圧延加工機への一定の送り込み長さ毎の伸び率を定長伸び率測定値として演算する定長伸び率演算手段と、定長伸び率が演算された際の瞬時伸び率をロックオンし、その値からの瞬時伸び率の変化を定長伸び率演算周期間の伸び率変動値として演算する伸び率変化値演算手段と、該伸び率変動値を前記定長伸び率測定値に加える補整演算手段と、を有することを特徴とする。   The apparatus for measuring elongation of a metal plate according to the present invention comprises an entrance length measuring roll and an exit length measuring roll on each of an entrance side and an exit side of a rolling machine using the metal plate as the material to be rolled. In an elongation rate measuring device for obtaining an elongation rate, an input side pulse generating means for detecting a rotation angle of the roll connected to the entry side length measurement roll, and a rotation angle of the roll connected to the output side length measurement roll From the output side pulse generating means for detecting the input side, the input side roll speed calculating means for calculating the rotational speed of the input length measuring roll based on the output signal from the input side pulse generating means, and the output side pulse generating means Instantaneously using the output-side roll rotation speed calculation means for calculating the rotation speed of the output-side length measuring roll based on the output signal of the output side, and the rotation speed signal output from the input side and output-side length measurement roll rotation speed calculation means Instantaneous elongation rate calculation A constant length elongation rate calculating means for calculating an elongation rate for each constant feed length to the rolling mill as a constant length elongation measured value using a pulse output from the entry side and the output side pulse generating means; , Locking on the instantaneous elongation when the constant length elongation is calculated, and calculating the change in the elongation rate, which calculates the change in the instantaneous elongation from the value as the fluctuation value of the elongation during the constant length elongation calculation cycle And a compensation calculating means for adding the fluctuation value of the elongation rate to the measured value of the constant-length elongation rate.

本発明の金属板の伸び率計測方法は、金属板を被圧延材とする圧延加工機の、入側及び出側それぞれに備えた回転自在の入側測長ロール及び出側測長ロールを用いて、被圧延材の伸び率を求める伸び率計測方法において、前記入側測長ロールの回転角度を検出する入側パルス発生工程と、前記出側測長ロールの回転角度を検出する出側パルス発生工程と、
前記入側パルス発生工程の出力信号を基に入側ロールの回転速度を演算する入側ロール回転速度演算工程と、前記出側パルス発生工程の出力信号を基に出側ロールの回転速度を演算する出側ロール回転速度演算工程と、前記入側および出側ロール回転速度演算工程で出力される回転速度信号を用いて瞬時的な伸び率を演算する瞬時伸び率演算工程と、
前記入側および出側パルス発生工程のパルス出力を用いて圧延加工機への一定の送り込み長さ毎の伸び率を定長伸び率測定値として演算する定長伸び率演算工程と、定長伸び率が演算された際の瞬時伸び率をロックオンし、その値からの瞬時伸び率の変化を定長伸び率演算周期間の伸び率変動値として演算する伸び率変化値演算工程と、該伸び率変動値を前記定長伸び率測定値に加える補整演算工程と、を有することを特徴とする。 The method for measuring the elongation rate of a metal plate of the present invention uses a rotatable entrance length measuring roll and an exit length measuring roll provided on each of the entry side and the exit side of a rolling mill using the metal plate as a material to be rolled. In the elongation rate measuring method for obtaining the elongation rate of the material to be rolled, an entry side pulse generating step for detecting the rotation angle of the entry side length measuring roll, and an output side pulse for detecting the rotation angle of the exit side length measurement roll Generation process,
An input roll rotation speed calculation step for calculating the rotation speed of the input roll based on the output signal of the input pulse generation process, and a rotation speed of the output roll based on the output signal of the output pulse generation process An exit roll rotation speed calculation step, an instantaneous elongation rate calculation step of calculating an instantaneous elongation rate using the rotation speed signals output in the entry side and exit side roll rotation speed calculation steps,
A constant-length elongation calculation step of calculating the elongation at each constant feed length to the rolling mill as a constant-length elongation measurement value using the pulse outputs of the inlet-side and outlet-side pulse generation steps; An elongation rate change value calculation step of locking on the instantaneous elongation rate when the rate is calculated, and calculating a change in the instantaneous elongation rate from the value as an elongation rate fluctuation value during a constant length elongation rate calculation cycle; A correction operation step of adding a rate variation value to the constant length elongation measurement value.

本発明の伸び率計測装置によれば、瞬時伸び率に含まれる測定誤差を、定長伸び率演算毎にキャンセルできることから、測定精度と応答性を両立した伸び率を演算することができるなど、産業上有用な著しい効果を奏する。
According to the elongation measurement device of the present invention, since the measurement error included in the instantaneous elongation can be canceled for each constant length elongation calculation, it is possible to calculate the elongation that satisfies both measurement accuracy and responsiveness, etc. There are significant industrially useful effects.

以下、本発明の金属板の伸び率計測方法および装置の原理を鋼板の圧延機を圧延加工機の例として、図1を用いて説明する。鋼板1（被圧延材）は圧延機2にて所定の伸び率となるように圧延される場合を例に説明する。圧延機の入側測長ロール3と出側測長ロール4にはそれぞれのロールの回転角度を検出するパルス発生装置が設けられている。入側パルス発生器5は、入側測長ロールが回転することにより設定された回転角度ごとに入側パルスを発生して、定長伸び率演算手段9および、入側測長ロール回転速度演算手段7に入力する。また、出側パルス発生器6は、出側測長ロールが回転することにより設定された回転角度ごとに出側パルスを発生して、定長伸び率演算手段9および、出側測長ロール回転速度演算手段8に入力する。入側測長ロール回転速度演算手段7は、上記の入側パルス発生器5からのパルスを基に、予め設定した短時間の演算周期、例えばコンピュータプログラムにて当該処理を実施する場合は、プログラムの実行周期にて入側測長ロールの回転速度を演算して出力し、また出側測長ロール回転速度演算手段8は、上記の出側パルス発生器6からのパルスを基に、入側測長ロール回転速度の演算周期と同周期にて出側測長ロールの回転速度を演算して出力する。   Hereinafter, the principle of the method and apparatus for measuring the elongation rate of a metal plate according to the present invention will be described with reference to FIG. 1, using a steel sheet rolling mill as an example of a rolling mill. The case where the steel plate 1 (rolled material) is rolled by the rolling mill 2 so as to have a predetermined elongation will be described as an example. A pulse generator for detecting the rotation angle of each roll is provided on the entrance side length measuring roll 3 and the exit side length measuring roll 4 of the rolling mill. The incoming pulse generator 5 generates an incoming pulse for each rotation angle set by the rotation of the incoming length measuring roll, and calculates the constant length elongation rate calculating means 9 and the incoming length measuring roll rotation speed. Input to means 7. The output pulse generator 6 generates an output pulse at every rotation angle set by the rotation of the output length measuring roll, and the constant length elongation rate calculating means 9 and the output length measuring roll rotation Input to the speed calculation means 8. The entry-side length measuring roll rotation speed calculation means 7 is based on the pulse from the entry-side pulse generator 5 described above. The rotation speed of the input length measuring roll is calculated and output in the execution cycle of the output side, and the output length measuring roll rotation speed calculation means 8 is based on the pulse from the output pulse generator 6 described above. The rotation speed of the output length measuring roll is calculated and output at the same period as the length measurement roll rotation speed calculation cycle.

定長伸び率演算手段9は、（1）式に示した従来の伸び率演算方法と同様、入側鋼板が入側測長ロールから一定距離送り出される毎に、同一期間中に出側測長ロールを通過する板長さを検出し、それら値に基づいて次式にて伸び率を算出する。   The constant length elongation rate calculation means 9 is the same as the conventional elongation rate calculation method shown in equation (1), every time the incoming steel plate is fed from the incoming length measuring roll by a certain distance, the outgoing length measurement is performed during the same period. The plate length passing through the roll is detected, and the elongation percentage is calculated by the following formula based on these values.


εＬ＝（ｌＤ−ｌＥ）／ｌＥ×１００ ［％］ ・・・ （２）

ここで、εＬは鋼板の伸び率、ｌＥは、上記入側パルス発生器5により、あらかじめ設定された距離分入側鋼板が走行したことを検出した際の長さ計測値であり、ｌＤはｌＥを測定した際に、出側パルス発生器6により測定された出側鋼板の走行距離である。
ε L = (l D -l E ) / l E × 100 [%] ··· (2)

Here, ε L is the elongation rate of the steel sheet, and l E is the length measurement value when the entry side pulse generator 5 detects that the distance-entrance side steel sheet has traveled in advance, and l D is when measuring the l E, a travel distance of the exit-side steel sheet measured by the exit-side pulse generator 6.

瞬時伸び率演算手段10は、入側測長ロール回転速度演算手段7により出力される入側測長ロール回転速度ＶＥと、出側測長ロール回転速度演算手段8により出力される出側測長ロール回転速度ＶＤを用いて、これら回転速度演算周期と同様の短期間の演算周期、例えばコンピュータプログラムにて当該処理を実施する場合は、プログラムの実行周期にて（３）式にて瞬時伸び率εＶを演算する。 Instantaneous growth rate calculating means 10, the entry side measuring roller speed V E output by the entry side measuring roller rotational speed calculating means 7, measuring the delivery side output by output-side measuring roller rotational speed calculating means 8 When the long roll rotation speed V D is used and the processing is performed in a short-time calculation cycle similar to these rotation speed calculation cycles, for example, a computer program, the program is executed instantaneously according to equation (3) in the program execution cycle. Elongation rate ε V is calculated.


εＶ=（ＶＤ-ＶＥ）/ＶＥ×１００ ［%］ ・・・ （３）

伸び率変化値演算手段11は、定長伸び率演算手段9にて伸び率εが演算される毎に瞬時伸び率εＶをεＶ ｌｏｃｋ-ｏｎとしてロックオンし、（４）式にて瞬時伸び率の変化量ΔεＶを演算して出力する。ここで、定長伸び率演算手段9にて伸び率εが演算される周期、すなわち、εＶ ｌｏｃｋ-ｏｎが更新される周期は、瞬時伸び率εＶが演算される周期と比較して非常に長く、従って、（４）式のΔεＶは、定長伸び率εLが更新されない期間中の伸び率の変化を表すことになる。
ε V = (V D −V E ) / V E × 100 [%] (3)

The elongation rate change value calculating means 11 locks on the instantaneous elongation rate ε V as ε V lock-on every time the elongation rate ε is calculated by the constant length elongation rate calculating means 9, and instantaneously calculates by the equation (4). A change amount Δε V of the elongation rate is calculated and output. Here, the cycle in which the elongation rate ε is calculated by the constant length elongation rate calculating means 9, that is, the cycle in which ε V lock-on is updated is much shorter than the cycle in which the instantaneous elongation rate ε V is calculated. Therefore, Δε V in the equation (4) represents a change in elongation rate during a period in which the constant length elongation rate ε L is not updated.


ΔεＶ=εＶ − εＶ ｌｏｃｋ-ｏｎ ・・・ （４）

最終的な伸び率εは、定長周期にて演算されたεＬと短時間一定周期にて演算されたΔεＶを用いて、（５）式にて演算される。
Δε V = ε V −ε V lock-on (4)

The final elongation rate ε is calculated by equation (5) using ε L calculated at a constant length cycle and Δε V calculated at a short time constant cycle.


ε=εＬ + ΔεＶ ・・・ （５）

このように、定長伸び率εＬが演算されたタイミングで瞬時伸び率εＶをロックオン処理し、その値との差分を演算することで、定長伸び率εＬが演算されるタイミング毎に測定誤差がキャンセルされるため、瞬時伸び率測定値における、測定誤差が大きくなるという問題点を解決でき、また、この差分を定長伸び率εＬに補正値として加えることで、特にライン速度が遅い場合などに伸び率の演算周期が長くなり応答性が悪くなるという、定長伸び率の問題点が解決できるため、測定精度と応答性を両立した伸び率を演算することができる。
ε = ε L + Δε V (5)

Thus, the instantaneous growth rate epsilon V lock-on process at a timing constant length elongation epsilon L is computed, by calculating the difference between the values, for each timing constant length elongation epsilon L is calculated Since the measurement error is canceled, the problem that the measurement error becomes large in the instantaneous elongation measurement value can be solved. In addition, by adding this difference as a correction value to the constant length elongation ε L , the line speed can be increased. Since the problem of the constant length elongation rate that the elongation calculation period becomes longer and the responsiveness becomes worse can be solved, for example, when the speed is slow, the elongation rate that achieves both measurement accuracy and responsiveness can be calculated.

上記の入側測長ロール回転速度演算手段7、出側測長ロール回転速度演算手段8、定長伸び率演算手段9、瞬時伸び率演算手段10、及び伸び率変化値演算手段11は、パーソナルコンピュータやシーケンサを用いて、これらの各手段での演算をコンピュータプログラムで実行させることによって構成することができる。これらのパーソナルコンピュータやシーケンサに上記の演算周期と比べて十分高速動作するＡ／Ｄ変換器を具備し、上記の入側パルス発生器5や出側パルス発生器6のカウントを取り込んで各演算処理を実行させる。また、時々刻々算出される最終的な伸び率εや中間演算結果を圧延機の制御系へフィードバックさせても良く、また、コンピュータディスプレー上に時間的推移をグラフ化して表示させてもよい。   The above-mentioned input side length measuring roll rotation speed calculating means 7, output side length measuring roll rotation speed calculating means 8, constant length elongation rate calculating means 9, instantaneous elongation rate calculating means 10, and elongation rate change value calculating means 11 are personal A computer or a sequencer can be used to execute operations by these means using a computer program. These personal computers and sequencers are equipped with an A / D converter that operates at a sufficiently high speed compared to the above-described calculation cycle, and take the counts of the above-mentioned input-side pulse generator 5 and output-side pulse generator 6 to perform each calculation process. Is executed. Further, the final elongation rate ε and the intermediate calculation result calculated every moment may be fed back to the control system of the rolling mill, or the temporal transition may be displayed as a graph on a computer display.

図３には、本発明の金属板の伸び率計測方法の実施の形態の概略フローを示す。
まず、Ｓ１０１にて入側測長ロール及び出側測長ロールの回転速度を演算し、次にＳ１０２にて当該回転速度を用いて、前述の（３）式より瞬時伸び率εＶを演算する。ここで、当該処理タイミングが定長伸び率εLの演算タイミングであるか否かをＳ１０３にて判定し、定長伸び率の演算タイミングである場合、Ｓ１０５にて上記瞬時伸び率εＶをεＶ ｌｏｃｋ-ｏｎとしてロックオンしたうえで、Ｓ１０６にて瞬時伸び率の変化量ΔεＶを演算し、Ｓ１０７にて上記（５）式より最終的な伸び率εを演算する。また、Ｓ１０３における判定が、定長伸び率εLの演算タイミングでない場合は、前回ロックオンされたεＶ ｌｏｃｋ-ｏｎを用いてＳ１０６にて瞬時伸び率の変化量ΔεＶを演算する。
本フローにて示す工程は、本発明による伸び率計測を一回実行する際の手順である。実際の金属板の圧延の際には、伸び率演算開始から終了まで、コンピュータプログラムの実行周期毎に一回実行させる。
図２に、本発明の方法と、定距離カウント方式のみを用いた従来の方法について、実際に鋼板を圧延した際における伸び率演算結果の比較の一例を示す。本実施例においては、調質圧延ラインにて帯状薄板鋼板を圧延する際に、ライン速度および圧延機の入側・出側の張力を一定に保ちつつ、圧延荷重を徐々に増加させた。図２の細線は本発明を用いた場合であり、各ロールの回転速度および瞬時伸び率の演算周期は約40ms、定長伸び率の定長距離は、1000mmである。また、図２の太線は定距離カウント方式のみを用いた従来手法による伸び率演算値であり、伸び率演算における定長距離は、同じく1000mmとした。図２より、従来手法では定長距離毎にしか伸び率が演算されないため、測定値の更新周期が長く、応答性が悪いが、本手法を用いることで、ある程度の精度を確保しながら、より短周期で伸び率を得ることが可能となることが判明し、本発明の効果が確認された。 In FIG. 3, the schematic flow of embodiment of the elongation measuring method of the metal plate of this invention is shown.
First, in step S101, the rotational speeds of the entrance-side length measuring roll and the outgoing side length-measuring roll are calculated, and in step S102, the instantaneous elongation rate ε V is calculated from the above-described equation (3) using the rotational speeds. . Here, in S103, it is determined whether or not the processing timing is the calculation timing of the constant length elongation rate ε L. If the processing timing is the calculation timing of the constant length elongation rate ε, the instantaneous elongation rate ε V is set to ε in S105. After locking on as V lock-on , a change amount Δε V of the instantaneous elongation rate is calculated in S106, and a final elongation rate ε is calculated from the above equation (5) in S107. If the determination in S103 is not the calculation timing of the constant length elongation ε L , the instantaneous elongation change amount Δε V is calculated in S106 using ε V lock-on that was locked on last time.
The process shown in this flow is a procedure for executing the elongation measurement according to the present invention once. In actual rolling of the metal plate, it is executed once every execution period of the computer program from the start to the end of elongation rate calculation.
FIG. 2 shows an example of comparison of the elongation rate calculation results when the steel sheet is actually rolled for the method of the present invention and the conventional method using only the constant distance counting method. In this example, when rolling a strip-shaped sheet steel sheet in a temper rolling line, the rolling load was gradually increased while keeping the line speed and the tension at the entrance and exit sides of the rolling mill constant. The thin line in FIG. 2 shows the case where the present invention is used. The calculation period of the rotational speed and instantaneous elongation of each roll is about 40 ms, and the constant length distance of the constant length elongation is 1000 mm. Also, the thick line in FIG. 2 is an elongation rate calculation value according to a conventional method using only the constant distance counting method, and the constant length distance in the elongation rate calculation is also 1000 mm. From FIG. 2, since the elongation rate is calculated only for each fixed length distance in the conventional method, the measurement value update cycle is long and the responsiveness is bad. It was found that the elongation can be obtained in a short period, and the effect of the present invention was confirmed.

本発明の金属板の伸び率計測装置の構成を示すブロック図である。It is a block diagram which shows the structure of the elongation measuring apparatus of the metal plate of this invention. 本発明の金属板の伸び率演算手法と、定距離カウント方式のみを用いた従来の手法での伸び率演算結果を比較した一例を示すグラフである。It is a graph which shows an example which compared the elongation rate calculation method of the metal plate of this invention, and the elongation rate calculation result by the conventional method using only the constant distance count system. 本発明の属板の伸び率計測方法の手順を示すフローチャートである。It is a flowchart which shows the procedure of the elongation rate measuring method of the genus board of this invention.

符号の説明Explanation of symbols

１ 鋼板（被圧延材）
２ 圧延機
３ 入側測長ロール
４ 出側測長ロール
５ 入側パルス発生器
６ 出側パルス発生器
７ 入側測長ロール回転速度演算手段
８ 出側測長ロール回転速度演算手段
９ 定長伸び率演算手段
１０ 瞬時伸び率演算手段
１１ 伸び率変化値演算手段
εＬ 鋼板の伸び率
εＶ 瞬時伸び率
ε 伸び率演算値 1 Steel plate (rolled material)
2 Rolling mill 3 Incoming length measuring roll 4 Outgoing length measuring roll 5 Incoming side pulse generator 6 Outlet side pulse generator 7 Incoming side length measuring roll rotational speed calculating means 8 Outlet side length measuring roll rotational speed calculating means 9 Constant length Elongation rate calculation means 10 Instantaneous elongation rate calculation means 11 Elongation rate change value calculation means ε Elongation rate of L steel sheet ε V Instantaneous elongation rate ε Elongation rate calculation value

Claims (2)

金属板を被圧延材とする圧延加工機の入側及び出側それぞれに入側測長ロール及び出側測長ロールを備えた、被圧延材の伸び率を求める伸び率計測装置において、
前記入側測長ロールに接続されて該ロールの回転角度を検出する入側パルス発生手段と、
前記出側測長ロールに接続されて該ロールの回転角度を検出する出側パルス発生手段と、
前記入側パルス発生手段からの出力信号を基に入側測長ロールの回転速度を演算する入側ロール回転速度演算手段と、
前記出側パルス発生手段からの出力信号を基に出側測長ロールの回転速度を演算する出側ロール回転速度演算手段と、
前記入側および出側測長ロール回転速度演算手段から出力される回転速度信号を用いて瞬時的な伸び率を演算する瞬時伸び率演算手段と、
前記入側および出側パルス発生手段からのパルス出力を用いて圧延加工機への一定の送り込み長さ毎の伸び率を定長伸び率測定値として演算する定長伸び率演算手段と、
定長伸び率が演算された際の瞬時伸び率をロックオンし、その値からの瞬時伸び率の変化を定長伸び率演算周期間の伸び率変動値として演算する伸び率変化値演算手段と、
該伸び率変動値を前記定長伸び率測定値に加える補整演算手段と、を有することを特徴とする金属板の伸び率計測装置。 In the elongation rate measuring device for obtaining the elongation rate of the material to be rolled, provided with an entrance length measuring roll and an exit side length measuring roll on each of the entrance side and the exit side of the rolling machine with the metal plate as the material to be rolled,
Incoming pulse generating means connected to the incoming length measuring roll to detect the rotation angle of the roll;
An output-side pulse generating means connected to the output-side measuring roll and detecting the rotation angle of the roll;
Incoming roll rotational speed calculating means for calculating the rotational speed of the incoming length measuring roll based on the output signal from the incoming pulse generating means;
Outlet roll rotation speed calculating means for calculating the rotation speed of the output length measuring roll based on the output signal from the output side pulse generating means;
Instantaneous elongation rate calculating means for calculating an instantaneous elongation rate using a rotation speed signal output from the input side and output side measuring roll rotation speed calculation means;
Constant length elongation rate calculating means for calculating an elongation rate for each constant feed length to a rolling mill as a constant length elongation measured value using pulse output from the inlet side and outlet side pulse generating means,
Elongation rate change value calculation means that locks on the instantaneous elongation rate when the constant length elongation rate is calculated, and calculates the change in the instantaneous elongation rate from that value as the fluctuation value of the elongation rate during the constant length elongation rate calculation cycle; ,
Compensation calculation means for adding the fluctuation value of the elongation percentage to the measured value of the elongation ratio of the constant length. 金属板を被圧延材とする圧延加工機の入側及び出側それぞれに備えた入側測長ロール及び出側測長ロールを用いて、被圧延材の伸び率を求める伸び率計測方法において、
前記入側測長ロールの回転角度を検出する入側パルス発生工程と、
前記出側測長ロールの回転角度を検出する出側パルス発生工程と、
前記入側パルス発生工程の出力信号を基に入側測長ロールの回転速度を演算する入側ロール回転速度演算工程と、
前記出側パルス発生工程の出力信号を基に出側測長ロールの回転速度を演算する出側ロール回転速度演算工程と、
前記入側および出側ロール測長回転速度演算工程で出力される回転速度信号を用いて瞬時的な伸び率を演算する瞬時伸び率演算工程と、
前記入側および出側パルス発生工程のパルス出力を用いて圧延加工機への一定の送り込み長さ毎の伸び率を定長伸び率測定値として演算する定長伸び率演算工程と、
定長伸び率が演算された際の瞬時伸び率をロックオンし、その値からの瞬時伸び率の変化を定長伸び率演算周期間の伸び率変動値として演算する伸び率変化値演算工程と、
該伸び率変動値を前記定長伸び率測定値に加える補整演算工程と、を有することを特徴とする金属板の伸び率計測方法。 In the elongation rate measuring method for obtaining the elongation rate of the material to be rolled, using the entrance side length measuring roll and the exit side length measuring roll provided on each of the entrance side and the exit side of the rolling machine with the metal plate as the material to be rolled,
An entry-side pulse generation step for detecting the rotation angle of the entry-side length measuring roll;
An exit pulse generating step for detecting a rotation angle of the exit length measuring roll;
An entry-side roll rotation speed calculation step for calculating the rotation speed of the entry-side length measuring roll based on the output signal of the entry-side pulse generation step;
An output roll rotation speed calculation step for calculating the rotation speed of the output length measuring roll based on the output signal of the output pulse generation step;
An instantaneous elongation rate calculating step for calculating an instantaneous elongation rate using the rotation speed signal output in the entry side and output side roll length measurement rotation speed calculation step;
A constant length elongation rate calculating step of calculating an elongation rate for each constant feed length to the rolling mill as a constant length elongation measured value using the pulse output of the inlet side and outlet side pulse generation step;
Elongation rate change value calculation step that locks on the instantaneous elongation rate when the constant length elongation rate is calculated, and calculates the change in the instantaneous elongation rate from that value as the fluctuation value of the elongation rate during the constant length elongation rate calculation cycle; ,
And a compensation calculation step of adding the fluctuation value of the elongation percentage to the measured value of the elongation ratio of the constant length.
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