JPH03254318A - Method for diagnosing sensor in tandem rolling mill - Google Patents
Method for diagnosing sensor in tandem rolling millInfo
- Publication number
- JPH03254318A JPH03254318A JP2052397A JP5239790A JPH03254318A JP H03254318 A JPH03254318 A JP H03254318A JP 2052397 A JP2052397 A JP 2052397A JP 5239790 A JP5239790 A JP 5239790A JP H03254318 A JPH03254318 A JP H03254318A
- Authority
- JP
- Japan
- Prior art keywords
- sensor
- plate
- plate thickness
- stand
- speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title description 3
- 230000005856 abnormality Effects 0.000 abstract description 8
- 238000003745 diagnosis Methods 0.000 abstract description 5
- 238000002405 diagnostic procedure Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、複数の圧延スタンドで構成されるタンデム圧
延機に設置されている板厚センサあるいは板速センサの
診断方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of diagnosing a plate thickness sensor or plate speed sensor installed in a tandem rolling mill composed of a plurality of rolling stands.
近年の熱間・冷間圧延は板厚の厳格な精度の維持のため
の自動板厚制御（ＡＧＣ）を必要不可欠なものとしてい
る。In recent years, automatic plate thickness control (AGC) has become indispensable for hot and cold rolling in order to maintain strict accuracy in plate thickness.
このＡＧＣは各圧延機の入側、出側に設置された板厚セ
ンサあるいは板速センサ等のセンサの出力信号をベー“
スデータとするものであり、これらのセンサの正しい作
動が板厚の精度の維持のためにきわめて重要なものであ
る。This AGC is based on the output signals of sensors such as plate thickness sensors or plate speed sensors installed on the inlet and outlet sides of each rolling mill.
Correct operation of these sensors is extremely important to maintain plate thickness accuracy.
従来このタンデム圧延機に設置された各センサの正常作
動状態の診断は圧延ラインが停止した期間、板厚センサ
については基準厚みを持つサンプル板を測定して、また
板速センサにおいては基準速度を持つ回転盤を測定して
、それぞれその機能劣化を検出している。Conventionally, the normal operating state of each sensor installed in this tandem rolling mill was diagnosed by measuring a sample plate with a reference thickness for the plate thickness sensor and by measuring the reference speed for the plate speed sensor while the rolling line was stopped. We are measuring the rotary disks we have and detecting their functional deterioration.
ところが、かかるライン停止状態での検査では作業自体
が非能率であるばかりではなく、再現性の少ない異常を
検出することは難しい。However, such inspection while the line is stopped is not only inefficient, but also difficult to detect abnormalities with low reproducibility.
本発明において解決すべき課題は、タンデム圧延機にお
けるセンサ診断をセンサからの信号から直接診断できる
ようにして、能率的に且つ実稼働の状態の下での異常を
オンライン且つリアルタイムで検出できる診断法を実現
することにある。The problem to be solved by the present invention is to provide a diagnostic method that enables sensor diagnosis in tandem rolling mills to be performed directly from signals from sensors, and that can efficiently detect abnormalities online and in real time under actual operating conditions. The aim is to realize this.
本発明は、各圧延スタンドの出側に設置された板厚セン
サと収速センサとの出力を乗算した面積速度を各連続す
る２つの圧延スタンド毎の差として求め、これを基準値
と比較することによって、上記課題を解決したものであ
る。In the present invention, the areal speed obtained by multiplying the outputs of the plate thickness sensor and the collection speed sensor installed on the exit side of each rolling stand is obtained as a difference between each two consecutive rolling stands, and this is compared with a reference value. This solves the above problem.
本発明においては、板厚センサと収速センサとの出力は
乗算した面積速度として得られので、個々の板厚センサ
と収速センサにおける異常が相乗され、増幅されたデー
タとして簡単に検知することができ、また、実操業中に
、センサの出力信号から診断でき、オフラインにおける
サンプル板・回転盤での診断と比較して、再現性の少な
いハード不良の検知能力が十分にあるので、タンデム圧
延機のオンラインの制御因子として適したものである。In the present invention, since the outputs of the plate thickness sensor and the collection velocity sensor are obtained as the multiplied area velocity, abnormalities in the individual plate thickness sensors and the collection velocity sensor are multiplied and can be easily detected as amplified data. In addition, it can be diagnosed from the output signal of the sensor during actual operation, and has sufficient ability to detect hard defects with low reproducibility compared to offline diagnosis using a sample plate or rotary disk. It is suitable as an online control factor for the machine.
以下、本発明を実施例に基づいて具体的に説明する。 Hereinafter, the present invention will be specifically explained based on Examples.
第１図は本発明に係るセンサの診断方法を実施するため
の構成を示すブロック図である。FIG. 1 is a block diagram showing a configuration for implementing a sensor diagnostic method according to the present invention.
第１図において１は圧延スタンド、２は板〈被圧延材）
、３は板厚センサ、４は収速センサ、５は検出した板厚
と板速とより面積速度を求める乗算器、６は面積速度の
差を求める減算器、７は面積速度の差の積分値を求める
積分器、８は演算結果に基づいて判定を行う演算・判定
部、９は判定結果を表示する表示部である。In Figure 1, 1 is a rolling stand, 2 is a plate (material to be rolled)
, 3 is a plate thickness sensor, 4 is a velocity sensor, 5 is a multiplier that calculates the areal velocity from the detected plate thickness and plate velocity, 6 is a subtractor that calculates the difference in areal velocity, and 7 is an integral of the difference in areal velocity. An integrator for calculating a value, 8 a calculation/judgment section for making a judgment based on the calculation result, and 9 a display section for displaying the judgment result.
図示の構成において、各圧延スタンド１に板厚センサ３
と収速センサ４を有する一般的なタンデム圧延機では、
各スタンドの任意の時刻ｔでの面積速度（ｓ 、 （ｔ
） ）は、スタンド出側において板厚センサ３と収速セ
ンサ４の出力（ｈ 、 （ｔ）、ｖ 、 （ｔ））を積
算する次式によって得られる。In the illustrated configuration, each rolling stand 1 has a plate thickness sensor 3.
In a general tandem rolling mill having a yield sensor 4,
Area velocity (s, (t
) ) is obtained by the following equation, which integrates the outputs (h , (t), v , (t)) of the plate thickness sensor 3 and the velocity sensor 4 on the exit side of the stand.
ｓ、、（ｔ）＝ ｈｌ、（ｔ） ・ｖ、（ｔ）この積算
は、′！Ｊ１図において乗算器５によって行われる。s,, (t) = hl, (t) ・v, (t) This integration is '! This is done by multiplier 5 in diagram J1.
第ｎ番目のスタンドを中心とする面積速度の差は、
Δ５ｌ−１＋ｈ （ｔ）＝ ｓａ−＋（ｔ）−Ｓ
イ（１）で表わすことができるが、冷間圧延においては
幅方向の変化はないと仮定できるために、この面積速度
の差は理想的には０となる。しかしながら、現実的には
若干の誤差が発生するため、この差を一定時間積分した
次式を設け（第１図の減算器６゜積分器７〉、これを基
準値εｈ−１，ｈと比較する（演算・判定部８）
Ｓ Ｒ−１，ＩＩ ＝ Ｊ １Δｓｌ’ｌ −１＋。（
ｔ）ｄｔソシて、診断は連続する２つの圧延スタンドに
おいて算出した面積速度差積分値と比較値により第１表
に示す方法を適用することによって的確に診断できる。The difference in areal velocity around the nth stand is Δ5l-1+h (t)=sa-+(t)-S
(1) However, since it can be assumed that there is no change in the width direction during cold rolling, this difference in areal velocity is ideally zero. However, in reality, a slight error occurs, so the following equation is created by integrating this difference over a certain period of time (subtractor 6 and integrator 7 in Figure 1), and this is compared with the reference value εh-1, h. (Calculation/judgment unit 8) S R-1, II = J 1Δsl'l -1+. (
t) dtSo, the diagnosis can be made accurately by applying the method shown in Table 1 using the area speed difference integral value and the comparison value calculated in two consecutive rolling stands.
同表を参照して、例えばケースｈ〉 では（ｎ−１）ス
タンドとｎスタンドの差が基準値を越えている（即ち異
常である〉のに対し、ｎスタンドと（ｎ＋１）スタンド
の差は基準値の範囲内である。つまり、（ｎ−１） ス
タンドのセンサに異常があるために前者が基準値を越え
、後者が範囲内となっており、これより（ｎ−１）
スタンドの〔異常〕と判断される。Referring to the same table, for example, in case h〉, the difference between the (n-1) stand and the n stand exceeds the standard value (that is, it is abnormal), whereas the difference between the n stand and the (n+1) stand is It is within the standard value range.In other words, (n-1) There is an abnormality in the sensor of the stand, so the former exceeds the standard value, and the latter is within the range.From this, (n-1)
It is determined that there is an [abnormality] in the stand.
第１表
なお、収速センサ４については、例えば別に基準収速セ
ンサを準備しているので、必要な特定スタンドのどちら
のセンサが異常かを判定することは容易である。Table 1 Note that regarding the speed sensor 4, for example, a reference speed sensor is separately prepared, so it is easy to determine which sensor of the required specific stand is abnormal.
本発明によって以下の効果を奏することができる。 The following effects can be achieved by the present invention.
（１）通常運転中、リアルタイムに板厚センサ・収速セ
ンサの異常を診断することが可能である。(1) During normal operation, it is possible to diagnose abnormalities in the plate thickness sensor and velocity sensor in real time.
（２） センサの信号のみで診断することが可能となる
。(2) Diagnosis can be performed using only sensor signals.
（３）シたがって、センサネ良による板厚異常を最小に
抑えることが可能となる。(3) Therefore, it is possible to minimize plate thickness abnormalities due to sensor error.
第１図は本発明の診断方法を実施するためのブロック□
を示す。
１：圧延スタンド ２：板（被圧延材）３：板厚セ
ンサ ４：収速センサ５：乗算器 ６
：減算器
７：積分器 ８：演算・判定部９：表示部Figure 1 shows blocks for carrying out the diagnostic method of the present invention □
shows. 1: Rolling stand 2: Plate (rolled material) 3: Plate thickness sensor 4: Collection speed sensor 5: Multiplier 6
: Subtractor 7: Integrator 8: Calculation/judgment section 9: Display section
Claims (1)
速センサとの出力を乗算した面積速度を各連続する２つ
の圧延スタンド毎の差として求め、これを基準値と比較
するタンデム圧延機におけるセンサの診断方法。1. Tandem rolling in which the area velocity is obtained by multiplying the outputs of the plate thickness sensor and plate speed sensor installed on the exit side of each rolling stand as the difference between each two consecutive rolling stands, and this is compared with a reference value. How to diagnose sensors in machines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2052397A JPH03254318A (en) | 1990-03-02 | 1990-03-02 | Method for diagnosing sensor in tandem rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2052397A JPH03254318A (en) | 1990-03-02 | 1990-03-02 | Method for diagnosing sensor in tandem rolling mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03254318A true JPH03254318A (en) | 1991-11-13 |
Family
ID=12913674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2052397A Pending JPH03254318A (en) | 1990-03-02 | 1990-03-02 | Method for diagnosing sensor in tandem rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03254318A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059256A (en) * | 2010-11-26 | 2011-05-18 | 首钢总公司 | Equipment operating and process quality state monitoring system for high-speed rolling mill |
-
1990
- 1990-03-02 JP JP2052397A patent/JPH03254318A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059256A (en) * | 2010-11-26 | 2011-05-18 | 首钢总公司 | Equipment operating and process quality state monitoring system for high-speed rolling mill |
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