JPH04124223A - Detection of edge position of steel strip in furnace - Google Patents
Detection of edge position of steel strip in furnaceInfo
- Publication number
- JPH04124223A JPH04124223A JP24489390A JP24489390A JPH04124223A JP H04124223 A JPH04124223 A JP H04124223A JP 24489390 A JP24489390 A JP 24489390A JP 24489390 A JP24489390 A JP 24489390A JP H04124223 A JPH04124223 A JP H04124223A
- Authority
- JP
- Japan
- Prior art keywords
- steel strip
- board
- edge position
- furnace
- scanning
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 48
- 239000010959 steel Substances 0.000 title claims abstract description 48
- 238000001514 detection method Methods 0.000 title abstract description 7
- 230000005855 radiation Effects 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 abstract description 2
- 230000007257 malfunction Effects 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000007812 deficiency Effects 0.000 abstract 1
- 238000007751 thermal spraying Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、炉内鋼帯のエツジ位置検出方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for detecting the edge position of a steel strip in a furnace.
（従来の技術と発明が解決しようとする課題）従来、炉
内鋼帯のエツジ位置検出方法としては、オートワイド方
式、ｒＴＶ方式等がある。(Prior Art and Problems to be Solved by the Invention) Conventionally, methods for detecting the edge position of a steel strip in a furnace include an auto-wide method, an rTV method, and the like.
しかしなから、前者では、使用する投光器の光束か狭い
ため、通常、３〜４ケのセンサを組合わせて使用してお
り、光軸調整か困難であるとともに、投光器用ビームラ
ンプの寿命が短く、かつ、交換後に光軸の再調整を必要
とする。また、ガラスの曇りか検出性能に大きく影響す
る。However, in the former case, because the luminous flux of the projector used is narrow, three or four sensors are usually used in combination, making it difficult to adjust the optical axis and shortening the life of the beam lamp for the projector. , and requires readjustment of the optical axis after replacement. In addition, it greatly affects the detection performance of glass fogging.
一方、後者では、視野、光量確保のため、大きな反射板
か必要であるか、それたけ破損の危険性か大てあり、か
つ、反射板か曇るという種々の課題を備えている。On the other hand, the latter method requires a large reflector to ensure visibility and light intensity, and there is a considerable risk of damage to the reflector, and it also has various problems such as fogging of the reflector.
ところで、炉内鋼帯の温度を測定するのに、走査型放射
温度計で、鋼帯の幅方向を走査して測温する測温装置が
公知である。By the way, in order to measure the temperature of a steel strip in a furnace, there is a known temperature measuring device that measures the temperature by scanning the width direction of the steel strip using a scanning radiation thermometer.
この測温装置では、走査型放射温度計による検出輻射エ
ネルギーは、鋼帯のエツジ部を境として大きく変化する
。In this temperature measuring device, the radiant energy detected by the scanning radiation thermometer changes significantly at the edge of the steel strip.
したがって、本発明は前記測温装置の検出輻射エネルギ
ーの変化を利用して工、７ジ位置を検出する炉内鋼帯の
エツジ位置検出方法を提供することを目的とする。Therefore, an object of the present invention is to provide a method for detecting the edge position of a steel strip in a furnace, which detects the edge position by utilizing changes in the radiant energy detected by the temperature measuring device.
（課題を解決するための手段）
本発明は、前記目的を達成するために、高温炉内を走行
する鋼帯の裏側にコントラストボードを配設するととも
に、前記コントラストボードと対向する炉体部に前記鋼
帯温度を計測する走査型放射温度計を取り付け、前記走
査型放射温度計による検出輻射エネルギーの急変点にお
ける走査角度から鋼帯の工・ノシ位置を検出することを
特徴とする炉内鋼帯のエソ／位置検出方法である。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a contrast board on the back side of a steel strip running in a high-temperature furnace, and a contrast board on the furnace body facing the contrast board. A steel in a furnace characterized in that a scanning radiation thermometer for measuring the temperature of the steel strip is attached, and the cutting and cutting position of the steel strip is detected from the scanning angle at a sudden change point of the radiant energy detected by the scanning radiation thermometer. This is a method for detecting the position of the obi.
（実施例） つぎに、本発明の実施例を図面にしたがって説明する。(Example) Next, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明を連続鋼帯熱処理炉に適用した場合を示
し、１は炉体、２は搬送ロール、３はＣ３Ｐ、Ｃロール
、４は後続帯への継ぎ帯である。そして、鋼帯Ｓは搬送
ロール２、ｃ、ｐ、Ｃロール３により搬送されつつ炉内
で所定温度に加熱され、後続帯へ搬送される。５は鋼帯
Ｓのエツジ位置検出装置で、第２図に示すように、鋼帯
Ｓの裏側の両側部に配設したコントラストボード６と、
炉体１の突出部１ａに設けたθ０の範囲内で走査する走
査型放射温度計７とからなる。なお、前記コントラスト
ボード６は冷却あるいは溶射／コーティング処理を施し
たもので、たとえば、実施例のように鋼帯Ｓの温度か高
い場合には、水冷等で低ｌ晶とされ、低放射率のものを
使用する。FIG. 1 shows the case where the present invention is applied to a continuous steel strip heat treatment furnace, where 1 is a furnace body, 2 is a conveyance roll, 3 is a C3P and C roll, and 4 is a splice band to a subsequent band. Then, the steel strip S is heated to a predetermined temperature in the furnace while being transported by the transport rolls 2, c, p, and C rolls 3, and is transported to the subsequent belt. Reference numeral 5 denotes an edge position detection device for the steel strip S, which includes contrast boards 6 disposed on both sides of the back side of the steel strip S, as shown in FIG.
It consists of a scanning radiation thermometer 7 that is provided on the protrusion 1a of the furnace body 1 and scans within the range of θ0. The contrast board 6 is one that has been cooled or thermally sprayed/coated. For example, when the temperature of the steel strip S is high as in the example, it is made into a low l crystal by water cooling, etc., and has a low emissivity. use something
そして、鋼帯Ｓのエツジ位置は、前記走査型放射温度計
７が所定角度（θ）の範囲内で鋼帯Ｓおよびコントラス
トボード６を走査すると、その走査位ｆｆｉに対応して
鋼帯Ｓ１コントラストボード６の測定温度の出力信号は
図示しない演算回路に入力され、ここで前記出力信号の
補正演算を行い鋼帯Ｓの温度信号を出力する。Then, when the scanning radiation thermometer 7 scans the steel strip S and the contrast board 6 within a predetermined angle (θ), the edge position of the steel strip S is determined by the contrast of the steel strip S1 corresponding to the scanning position ffi. The output signal of the measured temperature of the board 6 is input to an arithmetic circuit (not shown), which performs a correction operation on the output signal and outputs a temperature signal of the steel strip S.
この場合、前述のように、鋼帯Ｓのエツジ部を境として
出力信号に大きな変動があるため、鋼帯Ｓの基準位置に
おける角度との差から鋼帯Ｓの蛇行量を検出することか
できる。In this case, as mentioned above, since there is a large variation in the output signal at the edge of the steel strip S, it is possible to detect the meandering amount of the steel strip S from the difference from the angle at the reference position of the steel strip S. .
すなわち、第３図に示すように、いま、鋼帯Ｓか蛇行な
しに正規の位置を搬送されている場合、エツジ部に対す
る前記走査型放射温度計７の角度か０１であることは幾
何学的に求められる。That is, as shown in FIG. 3, when the steel strip S is being conveyed at a normal position without meandering, it is geometrically true that the angle of the scanning radiation thermometer 7 with respect to the edge is 01. is required.
つきに、鋼帯Ｓかｅだけ蛇行すると、走査型放射温度計
７はθ、走査した場合に、放射エネル牛の差を感知する
。At the same time, when the steel strip S and e meander, the scanning radiation thermometer 7 senses the difference in radiant energy when scanning θ.
したがって、蛇行量ａは、前記（θ、−０１）から容易
に検出することができる。なお、前記とは反対側の鋼帯
Ｓのエツジについても全く同様である。Therefore, the meandering amount a can be easily detected from the above (θ, -01). The same applies to the edge of the steel strip S on the opposite side.
また、前記鋼帯エツジ位置検出装置５は、前記継ぎ帯４
に設けてもよい。Further, the steel strip edge position detection device 5
may be provided.
さらに、前記鋼帯エツジ位置検出装置５は、エツジ位置
のみならず、鋼帯Ｓの温度をも測温し、炉温コントロー
ルを行うパイロメータとしても利用できることはいうま
でもない。Furthermore, it goes without saying that the steel strip edge position detection device 5 can be used as a pyrometer that measures not only the edge position but also the temperature of the steel strip S and controls the furnace temperature.
（発明の効果）
以上の説明で明らかなように、本発明は、高温炉内を走
行する鋼帯の裏側にコントラストボードを配設するとと
もに、前記コントラストボードと対向する炉体部に前記
鋼帯温度を計測する走査型放射温度計を取り付け、前記
走査型放射温度計による検出輻射エネルギーの急変点に
おける走査角度から鋼帯のエツジ位置を検出するもので
あるから、従来のように、投・受光器を必要としないた
め、光軸調整が不要である。また、ランプを必要としな
いため、ランプ取替作業かなく、ランプの光ｔｇ衰によ
る感変不足、誤動作がないとともに、ガラスを使用しな
いため、曇りによる不都合もない。(Effects of the Invention) As is clear from the above description, the present invention provides a contrast board on the back side of a steel strip running in a high-temperature furnace, and a contrast board on the furnace body facing the contrast board. A scanning radiation thermometer that measures temperature is attached, and the edge position of the steel strip is detected from the scanning angle at the sudden change point of the detected radiant energy by the scanning radiation thermometer. Since no equipment is required, there is no need to adjust the optical axis. Further, since no lamp is required, there is no need to replace the lamp, and there is no lack of sensitivity or malfunction due to light tg decay of the lamp, and since no glass is used, there is no inconvenience caused by fogging.
さらに、鋼帯の巾方向の温度分布も同時に検出てきる等
の利点を有する。Furthermore, it has the advantage that the temperature distribution in the width direction of the steel strip can also be detected at the same time.
第１図は本発明を適用した連続熱処理炉の要部断面図、
第２図は第１図の■−■線断面図で、第３図は鋼帯蛇行
量の検出原理の説明図である。
Ｓ・・・鋼帯、１・・・炉体、２・・・搬送ロール、３
・・・Ｃ２Ｐ、Ｃロール、５・・・鋼帯エツジ位置検出
装置、６・・・コントラストボード、７・・・走査型放
射温度計。FIG. 1 is a sectional view of the main parts of a continuous heat treatment furnace to which the present invention is applied;
FIG. 2 is a sectional view taken along the line ■--■ in FIG. 1, and FIG. 3 is an explanatory diagram of the principle of detecting the amount of meandering of the steel strip. S... Steel strip, 1... Furnace body, 2... Conveyance roll, 3
...C2P, C roll, 5... Steel strip edge position detection device, 6... Contrast board, 7... Scanning radiation thermometer.
Claims (1)
ードを配設するとともに、前記コントラストボードと対
向する炉体部に、前記鋼帯温度を計測する走査型放射温
度計を取り付け、前記走査型放射温度計による検出輻射
エネルギーの急変点における走査角度から鋼帯のエッジ
位置を検出することを特徴とする炉内鋼帯のエッジ位置
検出方法。(1) A contrast board is provided on the back side of the steel strip running in the high-temperature furnace, and a scanning radiation thermometer for measuring the temperature of the steel strip is attached to the furnace body facing the contrast board, and the scanning radiation thermometer is installed on the furnace body facing the contrast board. A method for detecting the edge position of a steel strip in a furnace, characterized by detecting the edge position of the steel strip from a scanning angle at a sudden change point of detected radiant energy using a type radiation thermometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24489390A JPH04124223A (en) | 1990-09-12 | 1990-09-12 | Detection of edge position of steel strip in furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24489390A JPH04124223A (en) | 1990-09-12 | 1990-09-12 | Detection of edge position of steel strip in furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04124223A true JPH04124223A (en) | 1992-04-24 |
Family
ID=17125547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24489390A Pending JPH04124223A (en) | 1990-09-12 | 1990-09-12 | Detection of edge position of steel strip in furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04124223A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4940649U (en) * | 1972-07-13 | 1974-04-10 | ||
| JPS51138503A (en) * | 1975-05-27 | 1976-11-30 | Mitsubishi Electric Corp | Object detecting apparatus |
| JPH01319637A (en) * | 1988-06-20 | 1989-12-25 | Kawasaki Steel Corp | Detection of edge of traveling steel strip in furnace |
-
1990
- 1990-09-12 JP JP24489390A patent/JPH04124223A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4940649U (en) * | 1972-07-13 | 1974-04-10 | ||
| JPS51138503A (en) * | 1975-05-27 | 1976-11-30 | Mitsubishi Electric Corp | Object detecting apparatus |
| JPH01319637A (en) * | 1988-06-20 | 1989-12-25 | Kawasaki Steel Corp | Detection of edge of traveling steel strip in furnace |
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