JPH03254318A - Method for diagnosing sensor in tandem rolling mill - Google Patents

Method for diagnosing sensor in tandem rolling mill

Info

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
Application number
JP2052397A
Other languages
Japanese (ja)
Inventor
Hironori Motomatsu
元松 廣議
Satoshi Nakajima
智 中嶋
Yasuto Ago
吾郷 康人
Mitsunobu Inaba
稲葉 光延
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP2052397A priority Critical patent/JPH03254318A/en
Publication of JPH03254318A publication Critical patent/JPH03254318A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B38/00Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/04Methods 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

PURPOSE:To diagnose abnormalities of a plate thickness sensor, a plate speed sensor in a real time by obtaining a signal as an area speed given by multiplying the output of the plate thickness sensor by the output of the plate speed sensor. CONSTITUTION:In a tandem rolling mill having the plate thickness sensor 3 and the plate speed sensor 4 in each rolling stand 1, the area speed is obtained by multiplying the output of the plate thickness sensor 3 by the output of the plate speed sensor 4 through a multiplier 5 on the outlet side of the stand. Exact diagnosis is performed by an area speed difference integrated value calculated in two continuous rolling stands and a comparison value.

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.

〔従来の技術〕[Conventional technology]

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.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

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.

〔課題を解決するための手段〕[Means to solve the problem]

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.

〔作用〕[Effect]

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.

〔実施例〕〔Example〕

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.

〔発明の効果〕〔Effect of the invention〕

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.

【図面の簡単な説明】[Brief explanation of drawings]

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)

【特許請求の範囲】[Claims] 1、各圧延スタンドの出側に設置された板厚センサと板
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.
JP2052397A 1990-03-02 1990-03-02 Method for diagnosing sensor in tandem rolling mill Pending JPH03254318A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
JPWO2006123394A1 (en) Plate thickness controller
JPS6010810B2 (en) Rolling mill plate thickness control method
CN106424156A (en) Cold tandem mill thickness control system and thickness control method of cold tandem mill process
JPH03254318A (en) Method for diagnosing sensor in tandem rolling mill
JPS6127110A (en) Fault diagnosing method of hydraulic rolling reduction type rolling mill
JPS5821544A (en) Measuring method for chemical reaction rate
JPH05202930A (en) Abnormality monitoring method and apparatus for bearing
JP2710811B2 (en) Apparatus and method for monitoring thickness control function of rolling mill
JPH04178210A (en) Method for controlling strip thickness of rolling mill
JPH07214124A (en) Device for controlling rolling mill
JP2621990B2 (en) Diagnosis method of mechanical system operated by hydraulic servo system
JPH0533675A (en) Control system of gas turbine
JP2000346564A (en) Running wheel bearing abnormal state diagnosing device for sintered cooler
JPS6054256A (en) Method for diagnosing abnormality of continuous casting machine
JPS61223652A (en) Instrument for measuring speed of steel sheet between thin steel sheet mill stands
JPS62127112A (en) Meandering preventing method for rolling stock
JPS6087902A (en) Method for controlling accuracy of gamma-ray thickness gage in rolling of thick plate
JPH06103175B2 (en) Roll wear crown distribution detection method
JP3284948B2 (en) Strip meandering control method
JP2968693B2 (en) Calibration method of shape meter
JP3105401B2 (en) Foreign object clogging detection method for shape detection roller and its detection device
JPH08179826A (en) Stop factor diagnosing method for machine
EP0151675B1 (en) Method of automatically controlling the rate of reduction in a rolling mill
JPH10202034A (en) System for monitoring differential pressure of back washing of ceramic filter
JPH10263657A (en) Method for measuring roll profile and device therefor