JPS5890130A - Molten metal level gauge - Google Patents
Molten metal level gaugeInfo
- Publication number
- JPS5890130A JPS5890130A JP56189606A JP18960681A JPS5890130A JP S5890130 A JPS5890130 A JP S5890130A JP 56189606 A JP56189606 A JP 56189606A JP 18960681 A JP18960681 A JP 18960681A JP S5890130 A JPS5890130 A JP S5890130A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- light
- container wall
- container
- powder
- 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
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 26
- 239000002184 metal Substances 0.000 title claims abstract description 26
- 238000005266 casting Methods 0.000 abstract description 8
- 239000000843 powder Substances 0.000 abstract description 8
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000004907 flux Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000005286 illumination Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
- G01F23/292—Light, e.g. infrared or ultraviolet
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Continuous Casting (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は溶融金属の湯面を光学方式で検出する湯面計
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molten metal level gauge that optically detects the level of molten metal.
連続鋳造設備においてモールド内の溶鋼レベルを検出す
ることは操業の安定化、製品品質向上等の面から是非と
も必要なことであり、各種の湯面計が開発されている。Detecting the level of molten steel in the mold in continuous casting equipment is absolutely necessary from the standpoint of stabilizing operations and improving product quality, and various types of level gauges have been developed.
この一つとして、第１図に示す光学系を用いる方式があ
る。これは容器１であるモールド内の溶融金属２の設定
湯面レベル近傍が撮像できる工うに容器１の斜め上方に
位置して光電素子３として例えばＴＶカメラを設けると
共に、この光電素子３の受光信号を処理して溶融金属２
と上記容器の壁面１ａとの境界を検出する信号処理装置
（図示せず）とを設けたもので、溶融金属２の自発光に
よる明るさと、壁面１ａとの明るさの差に工り境界を検
出して湯面を測定するものである。One of these methods is a method using an optical system shown in FIG. For example, a TV camera is provided as a photoelectric element 3 located diagonally above the container 1 so that the vicinity of the set level of the molten metal 2 in the mold, which is the container 1, can be imaged. Process the molten metal 2
This device is equipped with a signal processing device (not shown) that detects the boundary between the molten metal 2 and the wall surface 1a of the container. It is used to detect and measure the hot water level.
しかしながら、この方式ではオーブン鋳造の場合に、不
規則的に湯面に浮上したノロが容器壁１ａに接近すると
、湯面の光強度が弱まり、容器壁１ａとの境界を安定し
て検出できなくなる。またパウダ鋳造の場合は、湯面上
に散布されたパウダ面の明るさが黒色になり、容器壁１
ａの明るさと同じになって境界を検出することができな
くなる等の問題があり友。However, in the case of oven casting with this method, when slag irregularly floats to the surface of the molten metal and approaches the container wall 1a, the light intensity on the surface of the molten metal weakens, making it impossible to stably detect the boundary with the container wall 1a. . In addition, in the case of powder casting, the brightness of the powder surface sprinkled on the hot water surface becomes black, and the surface of the container wall becomes black.
There are problems such as the brightness becomes the same as that of a, making it impossible to detect the boundary.
この発明は、上記従来技術の問題点を解消し、精度良く
、安定して湯面レベルを測定できる溶融金属湯面計を提
供することを目的とするものである。SUMMARY OF THE INVENTION An object of the present invention is to provide a molten metal level meter that can solve the above-mentioned problems of the prior art and can measure the level of molten metal stably and accurately.
この発明は容器壁に沿って溶融金属面を真上から照射す
る投光装置を設けたことを特徴とするものである。This invention is characterized in that a light projecting device is provided along the container wall to illuminate the molten metal surface from directly above.
以下この発明の一実施例を第２図にエリ説明する。これ
は溶融金属２の容器ノの壁面ｌａに沿って溶融金属面を
貞」二から照射する投光装置６を設けたものである。こ
の投光装置６は光源７と、容器壁１ａの延長上に位置し
て設けられ九ミラー８とから構成されており、光源７か
らの広がりのある光束はミラー８で反射され、容器壁１
ａに沿って湯面を真上から照射し、一部は容器１の」二
面１ｃを照射するようになっている。そして湯面上の炎
や火粉が光学系のノイズとなることがあるが、これらの
光のスペクトルは橙色から赤外域に集中していることに
着目し、光源７として青色から紫外域にも光のスペクト
ル成分が十分存在するキセノンランプまたは水銀燈を用
い、″また光電素子３としての〕゛ｖカメラの光学系に
青色から紫外域のみを透過するフィルタを付加すること
にエリ、」上記ノイズを低減できる工うにしである。１
次湯面上に散布され友パウダ４の凹凸にエリ、容器壁１
ａとの境界線に凹凸ができるが、これを平均化して正確
な湯面位置を測定する処理回路が信号処理装置９に組込
まれている。An embodiment of the present invention will be explained below with reference to FIG. This is provided with a light projecting device 6 that illuminates the molten metal surface along the wall surface la of the container containing the molten metal 2 from the outside. This light projecting device 6 is composed of a light source 7 and a mirror 8 located on an extension of the container wall 1a, and the spread light beam from the light source 7 is reflected by the mirror 8,
The hot water surface is irradiated from directly above along line a, and a portion of the water is irradiated onto the second surface 1c of the container 1. Flames and sparks on the surface of the hot water can cause noise in the optical system, but we focused on the fact that the spectrum of these lights is concentrated in the orange to infrared range, and we designed the light source 7 to cover the blue to ultraviolet range. By using a xenon lamp or a mercury lamp with sufficient spectral components of light, and by adding a filter that transmits only the blue to ultraviolet region to the optical system of the camera, which serves as the photoelectric element 3, it is possible to eliminate the above noise. This is a process that can be reduced. 1
Next, it is sprinkled on the hot water surface and the unevenness of Tomo Powder 4 is rubbed, and the container wall 1
Although unevenness occurs on the boundary line with point a, a processing circuit is built into the signal processing device 9 to average this out and measure the accurate hot water level position.
而して、第２図に示すパウダ鋳造の場合に、黒色になっ
ているパウダ４面上に、負、上から照射された照明光に
エリ第３図に示すような照明部１０のある画像が得られ
るので、容器壁１ａとの境界を鮮かに検出することがで
きる。In the case of powder casting shown in FIG. 2, an image with an illumination part 10 as shown in FIG. Therefore, the boundary with the container wall 1a can be clearly detected.
第４図は、この場合の湯面レベルの測定データの一例を
示すもので、パウダ４の厚みの変化を除けば、±ｌ ＋
ｕ＋の精度が期待できる。またオーブン鋳造の場合にも
、溶融金属２の自発光と照明光の反射光の両者が光電素
子に受光され２ようになるので、容器壁１ａとの境界を
エリ明らかに検出することができ、またノロが湯面に浮
上して自発光が弱められても、第３図に示したのと同様
に照明部１０からの照明光の反射光が受光されるので安
定した湯面検出を行うことができる。Figure 4 shows an example of the measurement data of the hot water level in this case, and excluding the change in the thickness of powder 4, ±l +
You can expect u+ accuracy. Also, in the case of oven casting, both the self-luminous light of the molten metal 2 and the reflected light of the illumination light are received by the photoelectric element 2, so that the boundary with the container wall 1a can be clearly detected. Furthermore, even if slag floats to the surface of the hot water and the self-luminescence is weakened, the reflected light from the illumination unit 10 is received in the same way as shown in FIG. 3, so stable hot water level detection can be performed. Can be done.
この発明の湯面計は上記のようなもので、オーブン鋳造
、パウダ鋳造のいずれの場合にも溶融金属の湯面レベル
を精度工く、安定して測定することができる。The level meter of the present invention as described above is capable of accurately and stably measuring the level of the molten metal in both oven casting and powder casting.
第１図は従来の光学方式の湯面計の概要説明図、第２図
はこの発明の一実施例を示す説明図、第３図及び第４図
はそれぞれ画像と測定結果の一例を示す説明図である。
Ｉ・・・容器、１ａ・・・容器壁、２・・・溶融金属、
３・・・光ｔ！素子、６・・・投光装置、９・・・信号
処理装置。Fig. 1 is a schematic explanatory diagram of a conventional optical water level gauge, Fig. 2 is an explanatory diagram showing an embodiment of the present invention, and Figs. 3 and 4 are explanatory diagrams showing examples of images and measurement results, respectively. It is a diagram. I... Container, 1a... Container wall, 2... Molten metal,
3...Light! Element, 6... Light projecting device, 9... Signal processing device.
Claims (1)
の斜め上方に位置して設けられた光電素子と、この光電
素子の受光信号を処理して溶融金属と上記容器壁との境
界を検出する信号処理装置とを備えたものにおいて、上
記容器壁に沿って溶融金属面を真上から照射する投光装
置を設けたことを特徴とする溶融金属湯面計。A photoelectric element is installed diagonally above the vessel to image the vicinity of the set level of the molten metal, and the boundary between the molten metal and the vessel wall is detected by processing the light reception signal of this photoelectric element. 1. A molten metal level gauge comprising a signal processing device, characterized in that a light projection device is provided along the container wall to illuminate the molten metal surface from directly above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56189606A JPS5890130A (en) | 1981-11-26 | 1981-11-26 | Molten metal level gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56189606A JPS5890130A (en) | 1981-11-26 | 1981-11-26 | Molten metal level gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5890130A true JPS5890130A (en) | 1983-05-28 |
Family
ID=16244117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56189606A Pending JPS5890130A (en) | 1981-11-26 | 1981-11-26 | Molten metal level gauge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5890130A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2616223A1 (en) * | 1987-06-03 | 1988-12-09 | Quartz & Silice | METHOD AND DEVICE FOR MONITORING THE FILLING OF A MOLD BY A PULVERULENT REFRACTORY MATERIAL |
| US20110109496A1 (en) * | 2008-01-18 | 2011-05-12 | Tata Steel Ijmuiden B.V. | Method and apparatus for monitoring the surfaces of slag and molten metal in a mould |
| US20160341591A1 (en) * | 2015-05-20 | 2016-11-24 | Airbus Operations Limited | Measuring surface of a liquid |
-
1981
- 1981-11-26 JP JP56189606A patent/JPS5890130A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2616223A1 (en) * | 1987-06-03 | 1988-12-09 | Quartz & Silice | METHOD AND DEVICE FOR MONITORING THE FILLING OF A MOLD BY A PULVERULENT REFRACTORY MATERIAL |
| US4956134A (en) * | 1987-06-03 | 1990-09-11 | Quartz Et Silice | Method of and apparatus for controlling the filling of a mold with a pulverulent refractory material |
| US20110109496A1 (en) * | 2008-01-18 | 2011-05-12 | Tata Steel Ijmuiden B.V. | Method and apparatus for monitoring the surfaces of slag and molten metal in a mould |
| US8717222B2 (en) * | 2008-01-18 | 2014-05-06 | Tata Steel Ijmuiden B.V. | Method and apparatus for monitoring the surfaces of slag and molten metal in a mould |
| US20160341591A1 (en) * | 2015-05-20 | 2016-11-24 | Airbus Operations Limited | Measuring surface of a liquid |
| US10527480B2 (en) * | 2015-05-20 | 2020-01-07 | Airbus Operations Limited | Method of measuring surface of a liquid by illuminating the surface of the liquid |
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