JPH0443905A - Method and instrument for measuring thickness of oxide film of steel strip - Google Patents
Method and instrument for measuring thickness of oxide film of steel stripInfo
- Publication number
- JPH0443905A JPH0443905A JP15150490A JP15150490A JPH0443905A JP H0443905 A JPH0443905 A JP H0443905A JP 15150490 A JP15150490 A JP 15150490A JP 15150490 A JP15150490 A JP 15150490A JP H0443905 A JPH0443905 A JP H0443905A
- Authority
- JP
- Japan
- Prior art keywords
- light
- oxide film
- steel strip
- film thickness
- color sensor
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 45
- 239000010959 steel Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims description 12
- 239000013307 optical fiber Substances 0.000 claims abstract description 8
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims 1
- 239000000498 cooling water Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 238000010926 purge Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 239000003086 colorant Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 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〕
本発明は非接触状態で綱帯表面の酸化膜厚を測定する方
法及びその装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for measuring the oxide film thickness on the surface of a rope in a non-contact manner.
従来より鋼帯の連続焼鈍設備や連続溶融亜鉛メツキ設備
等の焼鈍設備において、鋼帯表面にバーナーから高温の
燃焼ガスを直接吹付けて鋼帯を加熱、又は加熱還元する
直火加熱処理が行われている。Conventionally, in annealing equipment such as continuous annealing equipment for steel strips and continuous hot-dip galvanizing equipment, direct-fire heat treatment has been carried out in which the steel strip surface is heated or thermally reduced by directly spraying high-temperature combustion gas from a burner onto the surface of the steel strip. It is being said.
このような加熱処理を行うと、鋼帯表面に酸化膜が生成
され、その生成状態が鋼帯の最終製品に大きな影響を与
える。When such heat treatment is performed, an oxide film is generated on the surface of the steel strip, and the state of the oxide film has a great influence on the final product of the steel strip.
即ち、溶融亜鉛メツキ銅板は鋼帯の最大酸化膜厚にその
品質が左右されるし、一般鋼帯においても製品不良を生
ぜしめる。That is, the quality of hot-dip galvanized copper sheets depends on the maximum oxide film thickness of the steel strip, and even general steel strips cause product defects.
従って、か＼る酸化膜の生成状態を正確に把握する必要
があり、従来より放射線を利用した放射線厚さ針の擾案
（特願昭６３−２７１０４７号明細書）や化学的方法、
スパッタリングを利用する方法などが行われていた。Therefore, it is necessary to accurately understand the state of formation of such an oxide film, and conventional methods have been used to develop radiation thickness needles using radiation (Japanese Patent Application No. 63-271047), chemical methods, etc.
Methods such as using sputtering have been used.
しかしながら、前記の放射線厚さ計は精度上の問題と計
測の応答性の悪さのために、被測定物が移動する際の酸
化膜厚の測定に使用されてなく、又、化学的方法、スパ
ッタリング利用法は被測定物の表面を損傷する欠点を存
し、更に、測定に長時間を必要とするので、放射線厚さ
計と同様、移動中の被測定物の酸化膜厚を測定すること
が不可能であった。However, the radiation thickness meter described above is not used to measure the oxide film thickness when the object to be measured is moving due to accuracy problems and poor measurement response. This method has the disadvantage of damaging the surface of the object to be measured, and also requires a long time for measurement, so it is not possible to measure the oxide film thickness of the object while it is being moved, similar to the radiation thickness meter. It was impossible.
本発明は移動中の被測定物の酸化膜厚を容易に、且つ正
確に測定することを目的とする。An object of the present invention is to easily and accurately measure the oxide film thickness of a moving object.
本発明は上記目的を達成するために、被測定物の色彩を
酸化膜厚測定に利用したものであり、その特徴は被測定
物、例えば鋼帯が発する光をカラーセンサーで受光して
色の明度、色相を求め、しかる後該明度、色相より膜厚
を求めるところにあり、更にその装置として、鋼帯が発
する光を採光するために、採光管の一端に光源部と受光
部を併設し、該受光部とカラーセンサーを光ファイバー
を介して連結し、且つ該センサーで得られた色相と明度
より膜厚を演算する演算装置を設けたことを特徴とする
。In order to achieve the above object, the present invention utilizes the color of the object to be measured to measure the thickness of the oxide film.The present invention is characterized in that the color of the object to be measured, for example, a steel strip, is received by a color sensor to detect the color. The lightness and hue are determined, and then the film thickness is determined from the lightness and hue.Furthermore, as a device for this purpose, a light source section and a light receiving section are installed at one end of the lighting tube in order to collect the light emitted by the steel strip. , the light receiving section and the color sensor are connected via an optical fiber, and an arithmetic device is provided for calculating the film thickness from the hue and brightness obtained by the sensor.
本発明者等は鋼帯が直火無酸化加熱炉内を移動する際、
綱帯の入熱温度により順次鋼帯表面が黄色→青色→灰色
→黒色に変化することに着目し、各色彩における酸化膜
の生成量を調べたところ、黄色域では約３００Å以下、
青色域では３００〜６００人、灰色、黒色域では６００
Å以上になることが判った。The present inventors discovered that when the steel strip moves through the direct fire non-oxidation heating furnace,
Focusing on the fact that the steel strip surface changes sequentially from yellow to blue to gray to black depending on the heat input temperature of the steel strip, we investigated the amount of oxide film formed in each color, and found that in the yellow region, the amount of oxide film formed was approximately 300 Å or less;
300-600 people in the blue area, 600 people in the gray and black area
It was found that it was more than Å.
従って、鋼帯の各色彩域での膜厚を知ることができれば
該鋼帯の酸化膜生成状態を把握することができる。本発
明者はか−る認識のもとで、色彩と酸化膜厚との関係を
究明した。Therefore, if the film thickness in each color range of the steel strip can be known, the state of oxide film formation on the steel strip can be grasped. Based on this recognition, the present inventor investigated the relationship between color and oxide film thickness.
色彩は一般に、第４図に示すような円筒座標系で整理さ
れている。Colors are generally arranged in a cylindrical coordinate system as shown in FIG.
即ち、色彩は明度し、色相角度Ｈ１彩度Ｃで表わされる
が、それぞれを２．θ、ｒとして円筒座標に表示する。That is, colors have lightness and are expressed by hue angles H1 and chroma C, each of which is expressed by 2. It is expressed in cylindrical coordinates as θ and r.
なお、２を一定としたθ−ｒ平面を直角座標で示したも
のがａ軸、ｂ軸である。Note that the a-axis and b-axis are rectangular coordinates of the θ-r plane where 2 is constant.
本発明者等は前記り、ａ、ｂの各値と酸化膜厚の関係を
調査し、第５図に示すような結果を得た。The inventors investigated the relationship between the values of a and b and the oxide film thickness, and obtained the results shown in FIG. 5.
即ち、明度りは酸化膜厚が４５０人付近で変曲点を有し
、酸化膜厚と１対ｌの対応になっていないこと、また、
座標値ａは酸化膜厚が５００〜５５０人の間に負の側に
移ること、座標値すは８５０〜９００人の間に変曲点が
あること等が判明した。That is, the brightness has an inflection point when the oxide film thickness is around 450 people, and there is no 1:1 correspondence with the oxide film thickness;
It was found that the coordinate value a shifts to the negative side when the oxide film thickness is between 500 and 550 people, and that the coordinate value a has an inflection point between 850 and 900 people.
そこで酸化膜が４５０Å以下の場合は明度りに着目して
求めればよいことが判った。第６図は明度りと４５０Å
以下の酸化膜厚ＤＬとの関係を示したもので、下記式に
よって表わすことができる。Therefore, it was found that when the oxide film is 450 Å or less, it is sufficient to focus on brightness. Figure 6 shows brightness and 450 Å
The following relationship with the oxide film thickness DL is shown and can be expressed by the following formula.
ＤＬ＝Ａｏ＋Ａ＋ＸＬ＋ＡｚＸＬ”・・・（１）但し、
Ａ、＝５０４
Ａ、 ＝−２，１
Ａ、＝ −０，０５１９６
次に、酸化膜厚が４５０人超０厚い領域の場合について
解析をした結果、第５図の座標値ａ、ｂ、即ち色相Ｈに
着目すると広い領域で膜厚を求めることができるという
ことが判った。DL=Ao+A+XL+AzXL”...(1) However,
A, = 504 A, = -2,1 A, = -0,05196 Next, as a result of analyzing the case where the oxide film thickness exceeds 450 layers, the coordinate values a and b in Fig. 5, i.e. It has been found that by focusing on the hue H, the film thickness can be determined over a wide area.
第７図は酸化膜厚と色相との関係を示したもので、第５
図の膜厚と座標値ａ、ｂとの関係を縦軸にｂ、横軸にａ
を表示した座標に表わしたものである。即ち、酸化膜厚
は、ａ、ｂ共に００地点より出発し、１０００人までの
軌跡で表示されている。Figure 7 shows the relationship between oxide film thickness and hue.
The relationship between the film thickness and the coordinate values a and b in the figure is shown on the vertical axis b and horizontal axis a.
It is expressed in the displayed coordinates. That is, the oxide film thickness is displayed as a trajectory starting from point 00 for both a and b and extending up to 1000 people.
これを色相Ｈで表わすと、色相Ｈと酸化膜厚ＤＨとがは
一１対ｌの間係にあることが判る。When this is expressed by hue H, it can be seen that the hue H and the oxide film thickness DH are in a ratio of 11:1.
そこでＨ＝１０５°を始点とし、−〇方向へ回転する角
度Ｈ６を修正色相角度と定義し、酸化膜厚ＤＨに対し４
次回帰すると第８図に示すように、５００Å以上の酸化
膜厚に対しても精度よく推定することが可能となった。Therefore, starting from H = 105°, the angle H6 rotating in the -〇 direction is defined as the corrected hue angle, and 4
In the next regression, as shown in FIG. 8, it became possible to accurately estimate even oxide film thicknesses of 500 Å or more.
この関係を下記式で表わす。This relationship is expressed by the following formula.
Ｄｔｌ＝Ｂ６＋ＢＩＸＨ６＋ＢｔＸＨｉ＋ＩｈＸＨｉ＋
Ｂ４ＸＨ８−（２）但し、Ｂ、＝ ２３．２
Ｂ＋＝ ９．５３６６
Ｂｚ＝ −０，８８４４７
Ｂｓ＝ ３．４３７８Ｘ１０−’
Ｂ４＝ ４．１９９２Ｘ１０−’
しかしながら、酸化膜厚が薄い領域、特に３００〜４２
０人の範囲では第６図に示す明度Ｌ・の方が膜厚の変化
が大きいので精度が良いと考えられる。Dtl=B6+BIXH6+BtXHi+IhXHi+
B4XH8-(2) However, B, = 23.2 B+ = 9.5366 Bz = -0,88447 Bs = 3.4378X10-' B4 = 4.1992X10-' However, in the region where the oxide film thickness is thin, especially 300~ 42
In the range of 0 people, the brightness L· shown in FIG. 6 is considered to have better accuracy because the change in film thickness is larger.
そこで、修正色相角度Ｈ０が９０°未満の場合は、下記
（３）式により明度から推定した膜厚ＤＬと色相から推
定した膜厚ＤＨとの加重平均値を求め、より正確な膜厚
りを得るようにした。Therefore, when the corrected hue angle H0 is less than 90°, a weighted average value of the film thickness DL estimated from the lightness and the film thickness DH estimated from the hue is calculated using the following formula (3) to obtain a more accurate film thickness. I tried to get it.
Ｄ＝ＤＨＸｓｉｎ（Ｈａ）＋ＤＬＸ （１−ｓｉｎ（Ｈ
ａ）） −（３）この推定方法によって得た酸化膜厚と
実測値との関係を第９図に示す。酸化膜厚が７５〜５５
０人の範囲で両者がよく一致していることが判る。D=DHXsin(Ha)+DLX (1-sin(H
a)) -(3) The relationship between the oxide film thickness obtained by this estimation method and the actually measured value is shown in FIG. Oxide film thickness is 75-55
It can be seen that the two agree well within the range of 0 people.
以上より、鋼帯の酸化膜を測定するに際しては、カラー
センサーで明度し、座標値ａ、ｂを測定し、該座標値ａ
、ｂから修正色相角度Ｈ０を求め、該Ｈ０が９０°未満
の場合は上記（３）式によって膜厚を求め、また、上記
Ｈ０が９０°以上の場合は上記（２）式によって膜厚を
求め、これらから最終推定酸化膜厚を求めるのである。From the above, when measuring the oxide film on a steel strip, the brightness is measured with a color sensor, the coordinate values a and b are measured, and the coordinate value a
, b, calculate the corrected hue angle H0, and if H0 is less than 90°, calculate the film thickness using the above equation (3), and if the above H0 is 90° or more, calculate the film thickness using the above equation (2). The final estimated oxide film thickness is determined from these values.
次に、本発明を図面に基づいて更に説明する。 Next, the present invention will be further explained based on the drawings.
第′１図及び第２図は本発明で用いる採光管の一部断面
正面図及びそのＡ−Ａ断面図である０図において、採光
管３の先端部に光源部４と受光部５を併設す・る、該光
源部４はソケット９にセットされたランプ８、例えばキ
セノンランプ、とその前面をカバーした投光窓ｌＯで構
成されており、また、上記受光部５は受光センサーを介
してカラーセンサー（図示せず）に連結する光ファイバ
ー６と、前記受光部前面をカバーする採光窓１２とで構
成されている。前記光ファイバー６を保護する内管１９
の外周にパージガス管１８が設けられ、これにパージガ
ス人口１７が連結されている。該パージガス管１８の外
周に冷却水人口１３を一端に開口した冷却水導入パイプ
１４が設けられ、更に、該冷却水導入パイプ１４の外周
に冷却水排出パイプが設けられている。１４は冷却水出
口であり、又２０はランプ電源口である。Figures 1 and 2 are a partially sectional front view of a daylight tube used in the present invention, and a cross-sectional view taken along the line A-A of the daylight tube 3, in which a light source section 4 and a light receiving section 5 are installed together at the tip of the daylight tube 3. The light source section 4 is composed of a lamp 8, such as a xenon lamp, set in a socket 9, and a light projection window 1O that covers the front surface of the lamp. It consists of an optical fiber 6 connected to a color sensor (not shown) and a lighting window 12 that covers the front surface of the light receiving section. Inner tube 19 that protects the optical fiber 6
A purge gas pipe 18 is provided on the outer periphery of the purge gas pipe 18, and a purge gas port 17 is connected to this. A cooling water introduction pipe 14 having one end open to the cooling water intake 13 is provided on the outer periphery of the purge gas pipe 18, and a cooling water discharge pipe is further provided on the outer periphery of the cooling water introduction pipe 14. 14 is a cooling water outlet, and 20 is a lamp power supply port.
以上の構成をなす採光管３を第３図に示すように、炉体
ｌ内を走行する鋼帯１の上面に近接して配設する。前記
採光管３は鋼帯１の幅方向に移動可能になっているので
、鋼帯の側端部より順次他側端部に移動しつ一鋼帯より
発する光線を採光する。採光に際してはランプ８から強
い光量を照射光窓１０を介して鋼帯表面に照射し、鋼帯
温度、炉内温度等の外乱を低減しキセノンランプ反射光
だけを採光窓１２を介して受光センサーに受光する。As shown in FIG. 3, the lighting tube 3 having the above structure is arranged close to the upper surface of the steel strip 1 running inside the furnace body l. Since the lighting tube 3 is movable in the width direction of the steel strip 1, it sequentially moves from one side end of the steel strip to the other end, and captures the light rays emitted from one steel strip. During daylighting, a strong amount of light from the lamp 8 is irradiated onto the surface of the steel strip through the irradiation window 10 to reduce disturbances such as the temperature of the steel strip and furnace temperature, and only the reflected light from the xenon lamp is sent to the light receiving sensor through the daylight window 12. Receives light.
受光した光は光ファイバー６を通って炉外のカラーセン
サー７へ送られる。採光管３内は水冷却されると共に受
光部５がガスパージされる。The received light is sent to a color sensor 7 outside the furnace through an optical fiber 6. The interior of the lighting tube 3 is cooled with water, and the light receiving section 5 is purged with gas.
カラーセンサーでは鋼帯の発する光の明度し、座標値ａ
、ｂを測定し、演算部でこれら測定値に基づき前述の各
式に基づき鋼帯の酸化膜を演算するのである。The color sensor measures the brightness of the light emitted by the steel strip and calculates the coordinate value a
, b are measured, and the calculation section calculates the oxide film of the steel strip based on the above-mentioned formulas based on these measured values.
（実施例１）
連続焼鈍設備の直火還元帯の出側の炉体内における走行
中の鋼帯の上面に採光管を配設し、該鋼帯表面の酸化膜
を本発明の方法によって演算した。(Example 1) A lighting tube was installed on the upper surface of the steel strip running in the furnace body on the outlet side of the direct flame reduction zone of continuous annealing equipment, and the oxide film on the surface of the steel strip was calculated by the method of the present invention. .
鋼帯厚み二〇、５閣、直火還元帯の炉温： １３００℃
、板温：６５０℃、空燃比：０．９、通板速度：１５０
ン分、
採光した光の明度Ｌ＝４４
座標値ａ＝２
〃ｂ＝ｉｓ
修正色相角度Ｈ＠ ＝２１” （Ｈ６＜９０°）酸化
膜ＤＬ＝Ａｏ ＋ Ａｔ Ｘ４２＋＾ＸＸ４２”＝３１
Ｏ人
酸化膜ＤＨ＝Ｂ＠＋ＢＩ Ｘ２３＋ＢＺＸ２３ｇ＋Ｂ５
Ｘ２３３＋Ｂ４Ｘ２３’−１８９人
従って、酸化膜Ｄ＝ ２６６人
一方、鋼帯の同一個所における酸化膜厚を実測したとこ
ろ２４６人であった。従って、本発明の方法で得られた
膜厚が一実測値の±２５人以内にあって、その膜厚推定
値が正しいことが確認された。Steel strip thickness 20, 5 kaku, furnace temperature of direct fire reduction zone: 1300℃
, plate temperature: 650℃, air-fuel ratio: 0.9, plate threading speed: 150
Brightness of captured light L = 44 Coordinate value a = 2 〃b = is Corrected hue angle H @ = 21" (H6 < 90°) Oxide film DL = Ao + At X42 + ^XX42" = 31
O person oxide film DH=B@+BI X23+BZX23g+B5
X233+B4X23'-189 people Therefore, oxide film D=266 people On the other hand, when the oxide film thickness at the same location on the steel strip was actually measured, it was 246 people. Therefore, it was confirmed that the film thickness obtained by the method of the present invention was within ±25 of the actual measurement value, and that the estimated film thickness value was correct.
（実施例２）
実施例１と同様の鋼帯を空燃比を０．９２にした以外は
実施例１と同様の直火還元帯で処理した後、実施例１と
同一の場所で鋼帯の酸化膜を測定した。(Example 2) After treating the same steel strip as in Example 1 in the same direct flame reduction zone as in Example 1 except that the air-fuel ratio was set to 0.92, the steel strip was treated at the same location as in Example 1. The oxide film was measured.
採光した光の座標値ａ＝ ４
＃ ｂ＝−４２
修正色相角度Ｈ＠ ＝ １９０＠（Ｈ＠ ＞９０” ）
酸化膜Ｄ＝Ｂｏ＋Ｂ＋ Ｘ１９０＋ＢｔＸ１９０”＋Ｂ
ｓＸ１９０３＋Ｂ４Ｘ１９０’
＝４５２人
一方、鋼帯の同一個所における酸化膜厚を実測したとこ
ろ４６０人であった。従って、本発明の方法で得られた
膜厚が実測値の±２５λ以内にあることが確認された。Coordinate value of captured light a=4 #b=-42 Corrected hue angle H@=190@(H@>90”)
Oxide film D=Bo+B+X190+BtX190”+B
sX1903+B4X190' = 452 people On the other hand, when the oxide film thickness at the same location on the steel strip was actually measured, it was found to be 460 people. Therefore, it was confirmed that the film thickness obtained by the method of the present invention was within ±25λ of the actually measured value.
以上詳述したように、本発明は走行中の被測定物の酸化
膜厚を非接触状態で容易にかつ正確に測定することがで
きるので被測定物の加熱状態を効率良く制御でき、その
工業的効果は甚大である。As described in detail above, the present invention enables easy and accurate measurement of the oxide film thickness of a moving object in a non-contact manner, making it possible to efficiently control the heating state of the object. The effects are enormous.
第１図は本発明の装置の一部断面正面図、第２図は第１
図Ａ−Ａ断面図、第３図は本発明の実施状態を示す概略
断面図、第４図は色彩を円筒座標系で整理した図、第５
図は明度し、座標値ａ、ｂと酸化膜厚との関係を示す図
、第６図は明度りと酸化膜厚の関係を示す詳細図、第７
図は座標値ａ。
ｂ及び修正色相角度Ｈ０と酸化膜厚との関係を示す図、
第８図は修正色相角度Ｈ０と酸化膜厚の関係を示す詳細
図、第９図は本発明法で得た酸化膜厚推定値と実測値と
の関係を示す図である。
１・・・鋼帯、 ２・・・炉体、３・・・採光
管、 ４・・・光源部、５・・・受光部、
６・・・光ファイバー７・・・カラーセンサー及
び演算装置、８・・・ランプ、 ９・・・ソケ
ット、１０・・・照射光窓、 １２・・・採光窓、
１３・・・冷却水入口、 １４・・・冷却水導入パイ
プ、１５・・・冷却水出口、 １６・・・冷却水排出
パイプ、１７・・・パージガス入口、１８・・・パージ
ガス管、１９・・・内管、 ２０・・・ラン
プ電源口。
Ｚ°明度し
第
邑
酸化膜厚い）
明度Ｌ
フ
や
図FIG. 1 is a partially sectional front view of the device of the present invention, and FIG.
Figure 3 is a schematic cross-sectional view showing the implementation state of the present invention, Figure 4 is a diagram in which colors are arranged in a cylindrical coordinate system, Figure 5 is a cross-sectional view taken along the line A-A,
The figure shows the relationship between brightness, coordinate values a and b, and oxide film thickness. Figure 6 is a detailed view showing the relationship between brightness and oxide film thickness. Figure 7
The figure shows the coordinate value a. b and a diagram showing the relationship between the corrected hue angle H0 and the oxide film thickness,
FIG. 8 is a detailed diagram showing the relationship between the corrected hue angle H0 and the oxide film thickness, and FIG. 9 is a diagram showing the relationship between the estimated value of the oxide film thickness obtained by the method of the present invention and the actually measured value. DESCRIPTION OF SYMBOLS 1... Steel strip, 2... Furnace body, 3... Lighting tube, 4... Light source part, 5... Light receiving part,
6... Optical fiber 7... Color sensor and calculation device, 8... Lamp, 9... Socket, 10... Irradiation light window, 12... Lighting window,
13... Cooling water inlet, 14... Cooling water introduction pipe, 15... Cooling water outlet, 16... Cooling water discharge pipe, 17... Purge gas inlet, 18... Purge gas pipe, 19... ...Inner tube, 20...Lamp power supply port. (Z° brightness and thick oxide film) Brightness L
Claims (1)
採光管を鋼帯幅へ移動可能に配設し、前記採光窓より鋼
帯表面から発する光を採光して、該光を前記採光管の受
光部と光ファイバーを介してカラーセンサーに送り、し
かして該カラーセンサーで前記光の色彩より前記鋼帯表
面の酸化膜厚を演算することを特徴とする鋼帯の酸化膜
厚測定方法。 ２、採光管の一端に光源部と受光部を併設し、該受光部
とカラーセンサー及び演算装置とを光ファイバーを介し
て連結したことを特徴とする鋼帯の酸化膜測定装置。 ３、前記採光管に冷却パイプを設けた請求項２記載の装
置。[Claims] 1. A lighting tube having an irradiation light window and a lighting window is disposed in close proximity to the surface of the steel strip so as to be movable to the width of the steel strip, and light emitted from the surface of the steel strip is transmitted through the lighting window. The method is characterized in that the light is collected and sent to a color sensor through the light receiving part of the light collection tube and an optical fiber, and the color sensor calculates the oxide film thickness on the surface of the steel strip from the color of the light. Method for measuring oxide film thickness on steel strip. 2. An oxide film measuring device for a steel strip, characterized in that a light source section and a light receiving section are provided at one end of a lighting tube, and the light receiving section is connected to a color sensor and a calculation device via an optical fiber. 3. The device according to claim 2, wherein the lighting tube is provided with a cooling pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2151504A JPH0781842B2 (en) | 1990-06-12 | 1990-06-12 | Method and apparatus for measuring oxide film thickness of steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2151504A JPH0781842B2 (en) | 1990-06-12 | 1990-06-12 | Method and apparatus for measuring oxide film thickness of steel strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0443905A true JPH0443905A (en) | 1992-02-13 |
| JPH0781842B2 JPH0781842B2 (en) | 1995-09-06 |
Family
ID=15519959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2151504A Expired - Lifetime JPH0781842B2 (en) | 1990-06-12 | 1990-06-12 | Method and apparatus for measuring oxide film thickness of steel strip |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0781842B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010276349A (en) * | 2009-05-26 | 2010-12-09 | National Maritime Research Institute | Method of measuring film thickness, and film thickness measuring device and program |
| JP2011191252A (en) * | 2010-03-16 | 2011-09-29 | Nippon Steel Engineering Co Ltd | Surface quality evaluation method of metal and surface quality evaluation apparatus of metal |
| KR20140053162A (en) * | 2011-07-04 | 2014-05-07 | 케이엘에이-텐코 코포레이션 | Atmospheric molecular contamination control with local purging |
| JP2014146704A (en) * | 2013-01-29 | 2014-08-14 | Fuji Electric Co Ltd | Semiconductor device |
| JP2018066036A (en) * | 2016-10-18 | 2018-04-26 | Ｊｆｅスチール株式会社 | Hot rolled steel sheet for manufacturing electromagnetic steel sheet and manufacturing method therefor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS586913A (en) * | 1981-07-03 | 1983-01-14 | Nippon Steel Corp | Method and apparatus for observing interior of blast furnace |
| JPS61117404A (en) * | 1984-11-14 | 1986-06-04 | Toshiba Corp | Measuring instrument for film thickness |
| JPS6344106A (en) * | 1986-08-12 | 1988-02-25 | Canon Inc | Film thickness measuring method |
-
1990
- 1990-06-12 JP JP2151504A patent/JPH0781842B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS586913A (en) * | 1981-07-03 | 1983-01-14 | Nippon Steel Corp | Method and apparatus for observing interior of blast furnace |
| JPS61117404A (en) * | 1984-11-14 | 1986-06-04 | Toshiba Corp | Measuring instrument for film thickness |
| JPS6344106A (en) * | 1986-08-12 | 1988-02-25 | Canon Inc | Film thickness measuring method |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010276349A (en) * | 2009-05-26 | 2010-12-09 | National Maritime Research Institute | Method of measuring film thickness, and film thickness measuring device and program |
| JP2011191252A (en) * | 2010-03-16 | 2011-09-29 | Nippon Steel Engineering Co Ltd | Surface quality evaluation method of metal and surface quality evaluation apparatus of metal |
| KR20140053162A (en) * | 2011-07-04 | 2014-05-07 | 케이엘에이-텐코 코포레이션 | Atmospheric molecular contamination control with local purging |
| JP2014521072A (en) * | 2011-07-04 | 2014-08-25 | ケーエルエー−テンカー コーポレイション | Atmospheric molecular pollution control by local purging |
| JP2014146704A (en) * | 2013-01-29 | 2014-08-14 | Fuji Electric Co Ltd | Semiconductor device |
| JP2018066036A (en) * | 2016-10-18 | 2018-04-26 | Ｊｆｅスチール株式会社 | Hot rolled steel sheet for manufacturing electromagnetic steel sheet and manufacturing method therefor |
| WO2018074531A1 (en) * | 2016-10-18 | 2018-04-26 | Ｊｆｅスチール株式会社 | Hot-rolled steel sheet for manufacturing electrical steel, and method for manufacturing same |
| KR20190071745A (en) * | 2016-10-18 | 2019-06-24 | 제이에프이 스틸 가부시키가이샤 | Hot-rolled steel sheet for manufacturing electronic steel sheet and method for manufacturing the same |
| US11577291B2 (en) | 2016-10-18 | 2023-02-14 | Jfe Steel Corporation | Hot-rolled steel sheet for electrical steel sheet production and method of producing same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0781842B2 (en) | 1995-09-06 |
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