JPH0557340B2 - - Google Patents
Info
- Publication number
- JPH0557340B2 JPH0557340B2 JP22396585A JP22396585A JPH0557340B2 JP H0557340 B2 JPH0557340 B2 JP H0557340B2 JP 22396585 A JP22396585 A JP 22396585A JP 22396585 A JP22396585 A JP 22396585A JP H0557340 B2 JPH0557340 B2 JP H0557340B2
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- camera
- level
- melting furnace
- vacuum melting
- 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.)
- Expired - Lifetime
Links
- 239000002184 metal Substances 0.000 claims description 32
- 238000002844 melting Methods 0.000 claims description 22
- 230000008018 melting Effects 0.000 claims description 22
- 230000003287 optical effect Effects 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
- B22D11/201—Controlling or regulating processes or operations for removing cast stock responsive to molten metal level or slag level
- B22D11/204—Controlling or regulating processes or operations for removing cast stock responsive to molten metal level or slag level by using optical means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Continuous Casting (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、真空溶解炉における鋳型の溶湯レ
ベル測定装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a molten metal level measuring device for a mold in a vacuum melting furnace.
［従来技術とその問題点］
真空溶解炉内に備えられた鋳型内で溶解を行な
う設備においては、鋳型に注湯される溶湯レベル
を自動検出する必要があり、鋳鋼のように溶湯の
温度が高く発光する場合、その溶湯表面と鋳型と
の明暗を検出して溶湯レベルを測定している。原
理としては明暗を識別するために所定位置に設け
られた光センサー等を用いて鋳型上部を走査し、
溶湯による明部の走査時間により溶湯レベルを間
接的に求めていた。この溶湯レベルの検出は真空
溶解炉による連続鋳造設備においても必要とさ
れ、第３図及び第４図に従来の測定装置を示す。[Prior art and its problems] In equipment that performs melting in a mold installed in a vacuum melting furnace, it is necessary to automatically detect the level of molten metal poured into the mold. When the luminescence is high, the level of the molten metal is measured by detecting the contrast between the surface of the molten metal and the mold. The principle is to scan the upper part of the mold using a light sensor installed at a predetermined position to distinguish between light and dark.
The molten metal level was indirectly determined by the scanning time of the bright area by the molten metal. Detection of the molten metal level is also required in continuous casting equipment using a vacuum melting furnace, and a conventional measuring device is shown in FIGS. 3 and 4.
第３図において、１は真空溶解炉であり、２は
真空溶解炉１内に設けられた鋳型である。１ａは
真空溶解炉１の側壁上部に設けられた内部確認用
ののぞき窓であり、３はのぞき窓１ａのガラスに
金属蒸気が付着しないように設けられる回転円板
で、この円板３には直径方向に長くかつ中心に対
して対称となるスリツト３ａが設けられている。
円板３はのぞき窓１ａのガラス面とほぼ平行に位
置するとともに円板３の上半分がのぞき窓１ａと
対向するように設けられており、モータ４により
円板３が回転すると、のぞき窓１ａから周回する
スリツト３ａを介して内部の溶湯や鋳型２を間欠
的に見ることができるようになつている。５はの
ぞき窓１ａを介して真空溶解炉１内部の溶湯レベ
ルを測定するためのレベル測定用カメラであり、
この測定用カメラ５で得られた映像信号はあるレ
ベル（スレツシヨルド）値を境として明と暗とを
１又は、０に２値化された後、画像取り込み装置
６のメモリに書き込まれ、その書き込まれたメモ
リの明部である“１”をレベル演算する回路７で
調べることにより、鋳型２内の溶湯レベルが測定
されレベル計８により表示されるようになつてい
る。９は真空溶解炉１の内部をモニターするテレ
ビカメラであり、前記レベル測定用カメラ５の近
傍にかつ同一方向に並べて設けられる。１０はモ
ニター用の表示装置である。 In FIG. 3, 1 is a vacuum melting furnace, and 2 is a mold provided in the vacuum melting furnace 1. Reference numeral 1a is a peephole provided on the upper side wall of the vacuum melting furnace 1 for checking the inside, and 3 is a rotating disk provided to prevent metal vapor from adhering to the glass of the peephole 1a. A slit 3a is provided which is diametrically long and symmetrical about the center.
The disc 3 is located almost parallel to the glass surface of the peephole 1a, and is provided so that the upper half of the disc 3 faces the peephole 1a.When the disc 3 is rotated by the motor 4, the peephole 1a is rotated by the motor 4. The molten metal and the mold 2 inside can be seen intermittently through the slit 3a that circulates from the inside. 5 is a level measuring camera for measuring the molten metal level inside the vacuum melting furnace 1 through the viewing window 1a;
The video signal obtained by this measurement camera 5 is binarized into 1 or 0 for brightness and darkness at a certain level (threshold) value, and then written to the memory of the image capture device 6, and the written data is The level of the molten metal in the mold 2 is measured by checking the bright part "1" of the stored memory by a level calculation circuit 7, and the level of the molten metal in the mold 2 is measured and displayed by a level meter 8. A television camera 9 monitors the inside of the vacuum melting furnace 1, and is arranged in the vicinity of the level measuring camera 5 and in the same direction. 10 is a display device for monitoring.
この測定装置では２台のカメラで同時に炉内部
を見ようとしているため上記のぞき窓１ａを大き
くするかあるいは２個設ける必要があるが真空溶
解炉１の構造上やのぞき窓１ａへの金属蒸気付着
防止のためにものぞき窓１ａはできるだけ小さく
しなければならない。又、測定の中心軸からどち
らか一方のカメラの位置がずれることになり両カ
メラ間で協調をとるのが困難となる。 In this measuring device, two cameras are used to view the inside of the furnace at the same time, so it is necessary to make the viewing window 1a larger or to install two of them.However, due to the structure of the vacuum melting furnace 1, metal vapor adhesion to the viewing window 1a must be prevented. Therefore, the viewing window 1a must be made as small as possible. Furthermore, the position of one of the cameras is shifted from the central axis of measurement, making it difficult to coordinate between the two cameras.
第４図では炉内の監視と溶湯レベルの測定とを
１台のカメラ１１からの映像信号にて行なつてい
るので上述したような問題点は解消されるが、一
方のモニター用表示装置１０においては炉内全体
を見るために全体画像が必要であるが、これに反
してレベル測定のためには分離能が低下しないよ
うにレベル測定に必要となる溶湯部分のみの部分
画像が必要となる。このように広範囲を監視する
こととレベル測定の精度を上げるということは互
いに両立しないといつた問題点があつた。 In FIG. 4, the monitoring of the inside of the furnace and the measurement of the molten metal level are performed using video signals from one camera 11, so the above-mentioned problems are solved, but one monitor display device 10 In order to see the entire inside of the furnace, an entire image is required, but on the other hand, for level measurement, a partial image of only the molten metal part required for level measurement is required so as not to reduce the resolution. . There was a problem in that monitoring such a wide area and increasing the accuracy of level measurement were incompatible with each other.
［発明の目的］
この発明は上述した問題点をなくすためになさ
れたものであり、測定用ののぞき窓を大きくする
ことなく又、炉内全体の監視と精度の良いレベル
測定を可能にした真空溶解炉の溶湯レベル測定装
置を提供することを目的とする。[Purpose of the invention] This invention was made to eliminate the above-mentioned problems, and it provides a vacuum system that enables monitoring of the entire inside of the furnace and highly accurate level measurement without increasing the size of the observation window for measurement. The purpose of the present invention is to provide a molten metal level measuring device for a melting furnace.
［発明の構成］
この発明の真空溶解炉の溶湯レベル測定装置
は、真空溶解炉内に備えられた鋳型内の溶湯のレ
ベルを、この真空溶解炉に設けられたのぞき窓と
こののぞき窓の内側に設けたスリツトを有する回
転板とを介して測定する装置であつて、のぞき窓
とこののぞき窓外部に設けられた第１のカメラと
を結ぶ光学経路途中に入射光の一部を透過し他の
一部を反射する鏡を設け、この鏡からの反射光を
測定する第２のカメラを備え、一方のカメラにモ
ニタ用テレビを接続し、他方のカメラに溶湯レベ
ル測定手段を接続したことを特徴とする。[Structure of the Invention] The molten metal level measuring device for a vacuum melting furnace of the present invention measures the level of molten metal in a mold provided in the vacuum melting furnace by measuring the level of the molten metal in a mold provided in the vacuum melting furnace through a peephole provided in the vacuum melting furnace and the inside of the peephole. It is a device that measures through a rotary plate having a slit provided in the window, and a part of the incident light is transmitted through the optical path connecting the viewing window and a first camera installed outside the viewing window. A mirror is provided to reflect a portion of the molten metal, a second camera is provided to measure the reflected light from the mirror, one camera is connected to a monitor television, and the other camera is connected to a molten metal level measuring means. Features.
［実施例］
以下、この発明の１実施例であるレベル測定装
置を第１図の構成図により説明する。[Embodiment] Hereinafter, a level measuring device which is an embodiment of the present invention will be explained with reference to the configuration diagram of FIG.
真空溶解炉１は従来のものと同様であり、のぞ
き窓１ａを介して真空溶解炉１の内部を調べると
きの光学経路にハーフミラー２０が設けられる。
このハーフミラー２０は光の透過率と反射率とが
ほぼ等しいもので前記光学経路とは45°の角度で
もつて固定される。このハーフミラー２０の後方
で光学経路上にモニター用のテレビカメラ２１が
設けられ、このテレビカメラ２１で撮像した画像
を映すモニタ用表示装置１０が接続される。ハー
フミラー２０からの反射光を受けるためにレベル
測定用のテレビカメラ２２が前記光学経路と直交
する向きに設けられる。尚、このハーフミラー２
０の周囲には遮光ボツクス２０ａが設けられてい
て光学経路以外からの光りの侵入を防いでいる。
テレビカメラ２２の出力側には画面取り込み装置
６、レベル演算回路７、レベル計８が順次接続さ
れる。 The vacuum melting furnace 1 is similar to the conventional one, and a half mirror 20 is provided in the optical path when examining the inside of the vacuum melting furnace 1 through the viewing window 1a.
This half mirror 20 has substantially equal light transmittance and reflectance, and is fixed at an angle of 45° to the optical path. A monitor television camera 21 is provided on the optical path behind the half mirror 20, and a monitor display device 10 that displays images taken by the television camera 21 is connected. A television camera 22 for level measurement is provided in a direction perpendicular to the optical path to receive the reflected light from the half mirror 20. Furthermore, this half mirror 2
A light shielding box 20a is provided around 0 to prevent light from entering from other than the optical path.
A screen capture device 6, a level calculation circuit 7, and a level meter 8 are sequentially connected to the output side of the television camera 22.
テレビカメラ２１で撮影された溶湯面は表示装
置１０により表示され、又、テレビカメラ２２に
より得られた溶湯面を表わす映像情報は画像の明
暗に対応して２値化された後、画像取り込み装置
６のメモリにに書き込まれ、その書き込まれたメ
モリの明部である“１”の数がレベル演算回路７
に演算されることにより、レベル計８により鋳型
２内の溶湯レベルが表示される。 The molten metal surface photographed by the television camera 21 is displayed on the display device 10, and the video information representing the molten metal surface obtained by the television camera 22 is binarized according to the brightness and darkness of the image, and then the image capturing device The number of "1"s in the bright part of the written memory is written to the level calculation circuit 7.
As a result of the calculation, the level of the molten metal in the mold 2 is displayed by the level meter 8.
第２図は上記ハーフミラー２０を用いたときの
光学経路を示す図であり、A0を元の像とすると、
A1はハーフミラー２０を透過した像でありモニ
ター用のテレビカメラ２１に入射され、A2はハ
ーフミラー２０の反射による像でありレベル測定
用のテレビカメラ２２に入射される。 FIG. 2 is a diagram showing the optical path when using the half mirror 20, and if A 0 is the original image,
A 1 is an image transmitted through the half mirror 20 and is incident on a television camera 21 for monitoring, and A 2 is an image reflected by the half mirror 20 and is incident on a television camera 22 for level measurement.
ハーフミラー２０を光学経路に対して45°の角
度に設定したのは、像A2が上下方向に拡大縮小
されることなく、元の像A0と等価となるからで
ある。尚、ハーフミラー２０で反射した像A2は
元の像A0に対して左右が逆転するがレベル演算
処理を行なう過程で容易に判定可能であり問題と
ならない。又、レベル測定用のカメラとしては固
体撮像素子を用いたCCDカメラが分解能力や歪
みの点で適しているが、CCDカメラでは画面上
に白いノイズが現われるため表示装置１０は見ず
らくなるのでノイズの発生しない例えば撮像管方
式のカメラを用いるのが望ましい。 The reason why the half mirror 20 is set at an angle of 45° with respect to the optical path is because the image A 2 is not enlarged or reduced in the vertical direction and becomes equivalent to the original image A 0 . Note that the image A 2 reflected by the half mirror 20 is reversed left and right with respect to the original image A 0 , but this can be easily determined in the process of level calculation processing and does not pose a problem. Furthermore, as a camera for level measurement, a CCD camera using a solid-state image sensor is suitable in terms of resolution ability and distortion, but a CCD camera produces white noise on the screen, making the display device 10 difficult to see. It is desirable to use, for example, an image pickup tube type camera that does not generate noise.
このように光学経路上に光の進行を二つに分け
るハーフミラー２０を設け、それぞれの光経路に
テレビカメラ２１，２２を設けたので、従来テレ
ビカメラを２台設置したときのように一方のテレ
ビカメラが測定のための光学経路からずれるとい
つたこともなくなる。又、上記テレビカメラ２１
にはモニター用として炉内全体を撮影できるカメ
ラを用い、テレビカメラ２２としては鋳型２内の
溶湯部分を拡大して撮影できるカメラを用いるこ
とにより、モニター用表示装置１０で炉内全体を
見ることができ監視が容易となり、又、溶湯部に
おける分解能を上げることができ溶湯のレベル測
定を正確に行なうことができる。 In this way, a half mirror 20 is provided on the optical path that divides the progress of the light into two parts, and TV cameras 21 and 22 are provided on each optical path. If the television camera is moved out of the optical path for measurement, there will be no trace. In addition, the above TV camera 21
For this purpose, a camera capable of photographing the entire inside of the furnace is used as a monitor, and a camera capable of photographing an enlarged view of the molten metal inside the mold 2 is used as the television camera 22, so that the entire inside of the furnace can be viewed on the monitor display device 10. This makes monitoring easier, and the resolution in the molten metal section can be increased, making it possible to accurately measure the level of the molten metal.
なお、上記２つのテレビカメラ２１，２２の位
置を互いに入れ換えてもよいのはいうまでもな
い。 It goes without saying that the positions of the two television cameras 21 and 22 may be interchanged.
［発明の効果］
以上説明したように、この発明は、真空溶解炉
ののぞき窓とこののぞき窓外部に設けられたカメ
ラとを結ぶ光学経路途中に入射光の一部を別の方
向に反射させる鏡を設け、この反射光を測定する
ために別のカメラを設け、一方のカメラを炉内の
監視用とし、他方のカメラを溶湯レベル測定用と
することにより、それぞれの目的に応じて最適な
カメラを用いることができ、監視を容易とならし
めるとともに溶湯レベルを正確に測定することも
できる。[Effects of the Invention] As explained above, the present invention reflects a part of the incident light in another direction in the middle of the optical path connecting the peephole of the vacuum melting furnace and the camera provided outside the peephole. By installing a mirror and installing another camera to measure the reflected light, one camera is used to monitor the inside of the furnace and the other camera is used to measure the molten metal level, it is possible to find the optimal solution for each purpose. Cameras can be used to facilitate monitoring and also accurately measure the molten metal level.
第１図はこの発明の１実施例であるレベル測定
装置の断面図及びこの測定装置に接続される制御
ブロツク図、第２図はハーフミラーによる光経路
を示す説明図、第３図及び第４図は従来のレベル
測定装置の断面図及びこの測定装置に接続された
制御ブロツク図である。
１……真空溶解炉、２……鋳型、３……円板、
３ａ……スリツト、６……画像取り込み装置、７
……レベル演算、８……レベル計、１０……表示
装置、２０……ハーフミラー、２０ａ……遮光ボ
ツクス、２１，２２……テレビカメラ。
FIG. 1 is a sectional view of a level measuring device according to an embodiment of the present invention and a control block diagram connected to this measuring device, FIG. 2 is an explanatory diagram showing an optical path using a half mirror, and FIGS. The figure is a sectional view of a conventional level measuring device and a control block diagram connected to this measuring device. 1... Vacuum melting furnace, 2... Mold, 3... Disc,
3a...Slit, 6...Image capture device, 7
... Level calculation, 8 ... Level meter, 10 ... Display device, 20 ... Half mirror, 20a ... Light-shielding box, 21, 22 ... Television camera.
Claims (1)
ベルを、この真空溶解炉に設けられたのぞき窓と
こののぞき窓の内側に設けたスリツトを有する回
転板とを介して測定する装置であつて、のぞき窓
とこののぞき窓外部に設けられた第１のカメラと
を結ぶ光学経路途中に入射光の一部を透過し他の
一部を反射する鏡を設け、この鏡からの反射光を
測定する第２のカメラを備え、一方のカメラにモ
ニタ用テレビを接続し、他方のカメラに溶湯レベ
ル測定手段を接続したことを特徴とする真空溶解
炉の溶湯レベル測定装置。1 A device that measures the level of molten metal in a mold provided in a vacuum melting furnace through a viewing window provided in the vacuum melting furnace and a rotating plate having a slit provided inside the viewing window. A mirror that transmits part of the incident light and reflects the other part is installed in the optical path connecting the peephole and the first camera installed outside the peephole, and the reflected light from this mirror is 1. A molten metal level measuring device for a vacuum melting furnace, comprising a second camera for measurement, one camera connected to a monitor television, and the other camera connected to molten metal level measuring means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22396585A JPS6284861A (en) | 1985-10-07 | 1985-10-07 | Instrument for measuring level of continuous casting installation by vacuum melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22396585A JPS6284861A (en) | 1985-10-07 | 1985-10-07 | Instrument for measuring level of continuous casting installation by vacuum melting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6284861A JPS6284861A (en) | 1987-04-18 |
| JPH0557340B2 true JPH0557340B2 (en) | 1993-08-23 |
Family
ID=16806462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22396585A Granted JPS6284861A (en) | 1985-10-07 | 1985-10-07 | Instrument for measuring level of continuous casting installation by vacuum melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6284861A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100780310B1 (en) | 2007-03-14 | 2007-11-28 | 대교엔지니어링(주) | Liquid metal observing device of a vacuum tank |
| JP5713840B2 (en) * | 2011-08-12 | 2015-05-07 | 株式会社神戸製鋼所 | How to finish casting over vacuum |
| CN108127100B (en) * | 2018-01-11 | 2019-10-08 | 重庆长安汽车股份有限公司 | A kind of visual detection device of air injection machine compression system |
-
1985
- 1985-10-07 JP JP22396585A patent/JPS6284861A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6284861A (en) | 1987-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100777428B1 (en) | Image processing device and method | |
| JP2002071309A (en) | Three-dimensional image-detecting device | |
| KR0184039B1 (en) | Image quality inspection system and image synthesis method | |
| JPH0557340B2 (en) | ||
| JP3343445B2 (en) | LCD panel image quality inspection system | |
| JPS61223605A (en) | Method for inspecting surface shape | |
| JP2000081368A (en) | Lcd panel picture quality inspection method and device and image-reading method | |
| JP3282868B2 (en) | Resolution inspection method | |
| JPH09218952A (en) | Working plane inspecting device | |
| JP2002074346A (en) | Three-dimensional image inputting device | |
| JPH0781849B2 (en) | Electronic parts lead shape inspection device | |
| JP3216096B2 (en) | Imaging device | |
| JPH01313743A (en) | Method for inspecting colored periodic pattern | |
| JP3461579B2 (en) | Imaging device | |
| JP3303763B2 (en) | Road surface photographing device | |
| JP2868957B2 (en) | Method and apparatus for photographing inside cavity | |
| JP3308994B2 (en) | Defect image color display device | |
| JPH01313742A (en) | Method for inspecting periodic pattern | |
| JPH02236433A (en) | Method and device for measuring distortion of lens | |
| JPS5937764B2 (en) | Automatic reading and recording device for measured values | |
| JPH08146185A (en) | Appearance inspecting device for fuel assembly | |
| JPS63170830A (en) | Setting method for reference point for evaluating cathode-ray tube picture quality | |
| JPH04263598A (en) | Raster shape inspecting device | |
| JPH01174984A (en) | Camera | |
| JPS61293641A (en) | Level measuring instrument for continuous casting installation by vacuum melting |