JPS60127060A - Measuring device for level of molten metal surface - Google Patents

Measuring device for level of molten metal surface

Info

Publication number
JPS60127060A
JPS60127060A JP23394383A JP23394383A JPS60127060A JP S60127060 A JPS60127060 A JP S60127060A JP 23394383 A JP23394383 A JP 23394383A JP 23394383 A JP23394383 A JP 23394383A JP S60127060 A JPS60127060 A JP S60127060A
Authority
JP
Japan
Prior art keywords
molten metal
coil
mold
hot water
level
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
JP23394383A
Other languages
Japanese (ja)
Inventor
Kazuo Sano
和夫 佐野
Seigo Ando
安藤　静吾
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP23394383A priority Critical patent/JPS60127060A/en
Publication of JPS60127060A publication Critical patent/JPS60127060A/en
Pending legal-status Critical Current

Links

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
    • G01F23/26—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • 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
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
    • B22D11/186—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by using electric, magnetic, sonic or ultrasonic means

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Continuous Casting (AREA)

Abstract

PURPOSE:To measure the level of a molten metal surface with high accuracy by applying a magnetic field of a low frequency to a molten metal and detecting the magnetic field passed through the molten metal. CONSTITUTION:A magnetizing coil CO1 generates the electric field of the low frequency corresponding to a current value when curret of a low frequency and specified magnitude is passed from a low frequency generator 3 to the coil CO1. This magnetic field passes through the circumferential wall of a mold 1 and the inside of a molten metal 2 and arrives at a detecting coil CO2. The coil CO2 generates the induction voltage corresponding to the intensity of the magnetic field which is amplified to a prescribed level by a low-frequency amplifier 4 and is fed to a synchronous detector 5. The detector 5 converts the output voltage from the amplifier 4 to the DC voltage corresponding to the level of the molten metal by synchronizing the same with the current from the oscillator 3 subjected to a phase shifting by a prescribed angle by a phase shifter 6 and transmits the voltage to a recorder 7. As a result the level of the molten metal surface is recorded on recording paper 7a by the recorder 7.

Description

【発明の詳細な説明】 本発明は、連続鋳造装置に用いられるモールドに流入す
る溶融金属などの湯面レベルを測定する湯面レベル測定
装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a level measuring device for measuring the level of molten metal flowing into a mold used in a continuous casting apparatus.

連続鋳造とは、溶融金属や合金などを連続的に凝固させ
て種々の鋳造物を得るものであるｄｆ、連続鋳造技術の
発達により製綱工場ではスラブはもとよりブルームやビ
レットの鋳造力＆行なわれている。Continuous casting is a method of continuously solidifying molten metals and alloys to obtain various cast products.Due to the development of continuous casting technology, steel mills have increased the power and ability to cast not only slabs but also blooms and billets. ing.

ところで、連続鋳造装置では溶融金属や融解した合金な
どを一時的にモールドに流入させている。そして、スラ
ブ、プルームおよびビレットなどの鋳造品の品質を向上
させるには、このモールドに流入した溶融金属などの温
血レベルを精度高く測定する必要がある。そこで従来、
次のような方法によυ湯面レベルを測定していた。By the way, in a continuous casting apparatus, molten metal, molten alloy, etc. are temporarily flowed into a mold. In order to improve the quality of cast products such as slabs, plumes, and billets, it is necessary to accurately measure the level of warm blood in the molten metal flowing into the mold. Therefore, conventionally,
The hot water level was measured using the following method.

まず、熱電対を用いた方法でおる。この方法は、モール
ドの長手方向の周壁に所定間隔をおいて複数の熱電対を
配設し、湯面レベルの変化に対応して現われる熱気対の
電圧像から温度をめてこの温度から湯面レベルを測定し
ようとするものである。First, there is a method using a thermocouple. In this method, a plurality of thermocouples are arranged at predetermined intervals on the longitudinal wall of the mold, and the temperature is determined from the voltage image of the hot air pairs that appears in response to changes in the hot water level. This is an attempt to measure the level.

次に放射線Ｉを応用し九ＲＩ（ラジオアイソトープ）法
である。この方法は、放射線源としてＲＩを行い、との
ＲＩから放射される放射線をモールド内の溶融金属など
に照射してその透過してきた放射線の強度を検出し、湯
面レベルに対応した放射線の強度の変化によって間接的
に場面レベルを検出するものである。Next is the nine RI (radioisotope) method, which applies radiation I. This method uses RI as a radiation source, irradiates the molten metal in the mold with the radiation emitted from the RI, detects the intensity of the transmitted radiation, and measures the intensity of the radiation corresponding to the level of the molten metal. This method indirectly detects the scene level based on changes in .

また、光学的方法として工業用テレビジョン（ＩＴＶ）
等の撮像装置を用いて直接湯面レベルを映し出して湯面
レベルを測定するものがある。Also, as an optical method, industrial television (ITV)
There is a method that measures the hot water level by directly projecting the hot water level using an imaging device such as .

しかし１以上のような方法では、次のような間軸がある
。熱電対を用いた方法では、熱電対は湯面レベルの変動
に対してその応答性が悪く湯面レベルの急貧に対して追
従することができない。このため、精度の高い湯面レベ
ルの測定は不可能でおり、精度の高い湯面レベルの制約
は困難である。However, in methods such as 1 or more, there are the following axes. In the method using a thermocouple, the thermocouple has poor responsiveness to changes in the hot water level and cannot follow sudden drops in the hot water level. For this reason, it is impossible to measure the hot water level with high accuracy, and it is difficult to restrict the hot water level with high accuracy.

ＲＩ法は熱電対を用いた方法と比較して多少応答性は良
いが、放射線を用いるだめに作業員への放射線被爆の恐
れがあり労働安全上の面において問題がある。The RI method has a somewhat better response than the method using thermocouples, but since it uses radiation, there is a risk of radiation exposure to workers, which poses problems in terms of occupational safety.

またＩＴＶ等を用いた光学的方法では、・臂ウダーの厚
みも含めて測定されてしまい真の湯面レベルが得られな
い。また５％にビレットを鋳造する鋳造装置にあっては
、そのモールドは小断面積のものであるのでＩＴＶ等を
設置する場所に制約があυ実用化に困難な面がある。In addition, in the optical method using an ITV or the like, the thickness of the bulge is also included in the measurement, making it impossible to obtain the true level of the hot water. Furthermore, in the case of a casting device that casts a 5% billet, the mold has a small cross-sectional area, so there are restrictions on where to install ITVs, etc., making it difficult to put it into practical use.

本発明は上記実情に基づいてなされたもので。The present invention has been made based on the above circumstances.

その目的とするところは、小型つまり小断面積のモール
ドにおける湯面レベルを精度高く測定し得る湯面レベル
測定装置を提供することにあ。The purpose is to provide a hot water level measuring device that can accurately measure the hot water level in a small mold, that is, a mold with a small cross-sectional area.

る。Ru.

以下１本発明に係る湯面レベル測定装置の一実施例につ
いて第１図および第２図を診照して説明する。第１図は
本発明の湯面レベル測定装置の構成図である。同図にお
いて１は連続鋳造ｉｔに用いら介楡−ルドであって、こ
のモールド１には１例えば溶解金属（＃鋼）や溶解した
合金２　ＢＹ流入する。なお２ａはその湯面である。An embodiment of the hot water level measuring device according to the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a block diagram of a hot water level measuring device according to the present invention. In the figure, 1 is a mold used for continuous casting, and into this mold 1, for example, molten metal (# steel) or molten alloy 2 BY flows. Note that 2a is the hot water level.

さて、このモールド１の外周壁に近接した所定位１ｔｈ
Ｋｆｉｆ、ｌ化コイルＣＯＩが設けられている。Now, at a predetermined position 1th near the outer peripheral wall of this mold 1.
Kfif and lization coil COI are provided.

この磁化コイルＣＯＩは、低周波発振器３からの低周波
餉１流により励磁されるものである。This magnetization coil COI is excited by a low frequency current from a low frequency oscillator 3.

そして、磁化コイルＣＯ１にモールド１を介して対向し
たモールド１の外周壁に近接した位置に、検出コイルＣ
Ｏ２が設けられている。なお、検出コイルＣＯＩの設置
位置は、連続鋳造において必要とされる湯面レベルを測
定し得るモールド１０の長手方向に変えてもよい。Then, a detection coil C
O2 is provided. Note that the installation position of the detection coil COI may be changed in the longitudinal direction of the mold 10, which can measure the molten metal level required in continuous casting.

そうして、検出コイルＣＯ２に誘導された電圧は低周波
増幅器４ｆ：介して同期検波器５に送られるように構成
されている。この同期検波器５け、移相器６により所定
の角度だけ移相された低周波発振器３からの低周波電流
に基づいて同期ケと９低周波増幅器４の出力電圧を直流
電圧に変換して出力するものである。記録計７は同期検
波器５からの直流出力により湯面レベルをその記録紙７
ａに記録するものである。The voltage induced in the detection coil CO2 is then sent to the synchronous detector 5 via the low frequency amplifier 4f. Based on the low frequency current from the low frequency oscillator 3 whose phase has been shifted by a predetermined angle by the phase shifter 6, the output voltages of the synchronous detector and the nine low frequency amplifiers 4 are converted into DC voltage. This is what is output. The recorder 7 measures the hot water level using the DC output from the synchronous detector 5 on its recording paper 7.
This is what is recorded in a.

次に上記の如く構成された装−の動作について説明する
。低周波発振器３から低周波でその大きさが一定の電流
が磁化コイルＣＯ１に流されると、磁化コイルＣＯＩは
電流値に応じた低周波の磁界を発生する。この磁界は、
モールド１０の周壁および溶融金＠２内を通って検出コ
イルＣＯ２に達する。よって、磁界は、溶融金属２の量
すなわち湯面レベルに対応した強さにとなって検出コイ
ルＣＯ２に達することになる。Next, the operation of the device constructed as described above will be explained. When a low frequency current with a constant magnitude is passed from the low frequency oscillator 3 to the magnetizing coil CO1, the magnetizing coil COI generates a low frequency magnetic field according to the current value. This magnetic field is
It passes through the peripheral wall of the mold 10 and inside the molten metal @2 to reach the detection coil CO2. Therefore, the magnetic field reaches the detection coil CO2 with a strength corresponding to the amount of molten metal 2, that is, the level of the molten metal.

そして検出コイルＣＯ２ｉｄ、この磁界の強さに対応し
た誘導電圧全発生する。具体的に説明すると、検出コイ
ルＣＯ２に現れる誘起電圧は。Then, the detection coil CO2id generates an induced voltage corresponding to the strength of this magnetic field. To explain specifically, the induced voltage appearing in the detection coil CO2 is as follows.

磁化コイルＣＯＩに流される電流の周波数ｆおよび電流
値■、磁化コイルＣＯＩと検出コイルＣＯ２との間隔、
モールド１０の同質および厚み、さらにモールド１０内
の湯面レベルに対応して変化する。したがって励磁する
電流の周波数ｆおよび餉流値■、コイルＣＯＪ　、ＣＯ
２の間隔を一定とし、さらにモールド１ｏの材質。The frequency f and current value of the current flowing through the magnetizing coil COI, the distance between the magnetizing coil COI and the detection coil CO2,
It changes depending on the quality and thickness of the mold 10 and the level of the hot water inside the mold 10. Therefore, the frequency f of the exciting current and the current value ■, the coil COJ, CO
2, and the material of mold 1o.

厚みを変えなければ、検出コイルＣＯ２の誘導電圧は湯
面レベルの変化に対応したものとなる。If the thickness is not changed, the induced voltage of the detection coil CO2 will correspond to the change in the hot water level.

そこで、磁化コイルＣＯ１により発生ずる磁界の浸透深
さをみてみると、この浸透深さδは。Therefore, if we look at the penetration depth of the magnetic field generated by the magnetizing coil CO1, this penetration depth δ is.

δ＝ｆＴＬ■　・・・・・・・・・・・・・・・（υで
表わされる。ここで、ｆは磁界の周波数、μは磁界が交
差する導体（溶融金鵬およびモールド１０）の透磁率、
σは磁界が交差する導体の電気伝導度である。したかっ
て、第（１）式から理解できるように、モールド１０内
の温顔レベルか上昇すると溶融金属２によって磁化コイ
ルＣＯＩにより発生する磁界は弱くなる。これにより検
出コイルＣ０１の誘起電圧は小さくなる。δ=fTL■ ・・・・・・・・・・・・・・・(Represented by υ. Here, f is the frequency of the magnetic field, and μ is the transparency of the conductor (molten metal and mold 10) crossed by the magnetic field. Magnetic property,
σ is the electrical conductivity of the conductor crossed by the magnetic field. Therefore, as can be understood from equation (1), as the level of warm face inside the mold 10 increases, the magnetic field generated by the magnetization coil COI by the molten metal 2 becomes weaker. This reduces the induced voltage in the detection coil C01.

そうして、検出コイルＣＯ２に誘　起された電圧は低周
波増幅器４により所定レベルに増幅されて同期検波器５
に送られる。同期検波器５は、移相器６じよＩ）所定角
度たけ移相された低周波発振器３からの電流によって同
期をとり、低周波増幅器４からの出力電圧を、湯面レベ
ルに対応した直流電圧に変換して記録ｉｔ７に送出する
。この結果、記録計７によりその記録紙７ａに湯面レベ
ルが記録される。Then, the voltage induced in the detection coil CO2 is amplified to a predetermined level by the low frequency amplifier 4, and then the synchronous detector 5
sent to. The synchronous detector 5 is synchronized by the current from the low frequency oscillator 3 whose phase is shifted by a predetermined angle (I) by a phase shifter 6, and converts the output voltage from the low frequency amplifier 4 into a direct current corresponding to the level of the hot water. Convert it to voltage and send it to recording it7. As a result, the recorder 7 records the hot water level on the recording paper 7a.

第２図は以上のような装置によって得られた同１期検波
器５の出力特性を示す図である。なお。FIG. 2 is a diagram showing the output characteristics of the synchronous first-period detector 5 obtained by the device as described above. In addition.

第２図に示す出力特性は、モールド１０としてビレット
鋳造用（ビレツ）ＣＣＨ用）のものを用い、その寸法は
１１３　（ｍｒＵ’）Ｘ１３０　Ｃｍｍ）のもので得た
実験結果である。そして、出力は相対出力として示しで
ある。そして、湯面レベル「はモールド１０の上端から
の距離で表わしている。第２図に示すように本発明の装
置を用いれは約ｘｏｏｃｃｍ）　の測定ス・七ンをもっ
て湯面レベルを測定することができる。The output characteristics shown in FIG. 2 are the results of an experiment obtained using a mold 10 for billet casting (for CCH) with dimensions of 113 (mrU') x 130 Cmm). And the output is shown as relative output. The hot water surface level is expressed as the distance from the top of the mold 10. As shown in FIG. I can do it.

このように本装置においては、磁化コイルＣＯＩにより
モールド１０内の溶融金＠２に低周波の磁界を与え、溶
融金属２を通ってきた磁界を検出コイルＣＯ２によって
検出し、その誘導電圧を直流電圧に変換して湯面レベル
をめているので、　［３’ｌＪえは寸法１１８　（ｍｍ
）　Ｘ　１３０　（ｍｍ）の小型のモールド１０を用い
た場合第２図に示すような出力特性が得られ約ｌＯ〔儂
〕の範囲で湯面レベルを精度高く測定できる。よって。In this way, in this device, a low frequency magnetic field is applied to the molten metal @2 in the mold 10 by the magnetizing coil COI, the magnetic field passing through the molten metal 2 is detected by the detection coil CO2, and the induced voltage is converted into a DC voltage. Since the hot water level is determined by converting to
) When a small mold 10 of 130 (mm) is used, output characteristics as shown in FIG. 2 can be obtained, and the hot water level can be measured with high precision within a range of approximately 10 (I). Therefore.

他の寸法のモールド全周いた場合でも他の測定条件（例
えば励磁する周波数ｆなど）を変更することによってＭ
度高く湯面レベルを測定することができる。Even if the entire circumference of a mold with other dimensions is used, it is possible to
It is possible to measure the hot water level with high accuracy.

また、同期検波器５において同期検波方式により低周波
増幅器４の出力電圧を直流電圧に変換しているので、励
磁周波数に同期しないノイズ成分は除去されＳＮ比を向
上させることができる。Furthermore, since the output voltage of the low frequency amplifier 4 is converted into a DC voltage by the synchronous detection method in the synchronous detector 5, noise components that are not synchronized with the excitation frequency are removed, and the S/N ratio can be improved.

なお、本発明は上記一実施例に限定されるものではない
。例えば第３図に示すように検出コイルを２個設けても
よい。っ壕り検出コイルＣＯ，？、ＣＯ４’（ｒ、ｔａ
化コイルｃｏ１にモールド１０を介して対向する位置の
モールド１ｏの外周壁に近接し、かつ磁化コイル００１
を通る水平面に対して上下方向の位置にそれぞれ配置し
たものである。そうして、これら検出コイルＣＯｓ　、
ＣＣｚの誘起電圧は、加算器（不図示）により加えられ
て％第１図に示す低周波増幅器４に送るように構成する
。第４図は検出コイルＣＯＪ、ＣＯ４を用いて実験し得
られた出力特性図である。第４図から判るように測定ス
・臂ンは、約２０〔儂〕となり上記一実施例の測定スフ
４ンのおよそ２倍に拡大されている。したがって、上記
一実施例の効果と同様の効果を得られることはいうまで
もなく、さらに測定ス／卆ンを拡大することができる。Note that the present invention is not limited to the above embodiment. For example, two detection coils may be provided as shown in FIG. Trench detection coil CO,? , CO4'(r, ta
The magnetizing coil 001 is close to the outer circumferential wall of the mold 1o at a position facing the magnetizing coil co1 via the mold 10, and
They are placed at vertical positions with respect to the horizontal plane passing through. Then, these detection coils COs,
The induced voltage of CCz is added by an adder (not shown) and sent to the low frequency amplifier 4 shown in FIG. FIG. 4 is an output characteristic diagram obtained through an experiment using detection coils COJ and CO4. As can be seen from FIG. 4, the measurement area is about 20 [me], which is approximately twice the measurement area 4 of the above-mentioned embodiment. Therefore, it goes without saying that the same effects as those of the above-mentioned embodiment can be obtained, and the measurement scope/volume can be further expanded.

さらに、本発明は、検出コイルＣ０２゜ＣＯ３とＣＯ４
ばかりでなく各種の磁気センナを用いてもよく、その主
旨を逸脱しない範囲で変形することが可能でおる。Furthermore, the present invention provides detection coils C02゜CO3 and CO4.
In addition, various types of magnetic sensors may be used, and modifications can be made without departing from the spirit of the invention.

したがって本発明によれは、ｖｉ磁化コイルより発生し
モールド内の溶融金属内を通ってきた磁界を検出コイル
によって検出し、その誘起電圧を同期検波部により直流
電圧に変換して湯面レベルを測定するので、小断面積の
モールドにおける湯面レベルを精度高く測定し得る湯面
レベル測定装置を提供できる。Therefore, according to the present invention, the magnetic field generated by the vi magnetization coil and passing through the molten metal in the mold is detected by the detection coil, and the induced voltage is converted into a DC voltage by the synchronous detection section to measure the hot water level. Therefore, it is possible to provide a hot water level measuring device that can accurately measure the hot water level in a mold with a small cross-sectional area.

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

第１図は本発明に係る湯面レベル測定装置の一実施例を
示す構成図、第２図は本発明装置により得られる出力特
性図、第３図は本発明装置における検出コイルを２個用
いた場合の構成図。 第４図は第３図に示す検出コイルによジ得られる出力特
性図である。 １・・・モールド、２・・・溶融金＠、３・・・低周波
発振器、４・・・低周波増幅器、５・・・同期検波器、
６・・・移相器、７・・・記録計、ＣＯＩ・・・磁化コ
イル。 出願人代理人　弁理士　鈴　圧式　彦 第１図 第２図 ：、Ｓ湘しヘルｈ（Ｃｍ） 第３図 第４図 相 湯面レベルｈ（Ｃｍ）Fig. 1 is a configuration diagram showing an embodiment of the hot water level measuring device according to the present invention, Fig. 2 is a diagram of output characteristics obtained by the device of the present invention, and Fig. 3 is a diagram showing the use of two detection coils in the device of the present invention. Configuration diagram in case of FIG. 4 is an output characteristic diagram obtained by the detection coil shown in FIG. 3. 1... Mold, 2... Molten gold@, 3... Low frequency oscillator, 4... Low frequency amplifier, 5... Synchronous detector,
6... Phase shifter, 7... Recorder, COI... Magnetizing coil. Applicant's agent Patent attorney Suzu Hiko Hiko Figure 1 Figure 2: ,S-Help h (Cm) Figure 3 Figure 4 Phase Water surface level h (Cm)

Claims (2)

【特許請求の範囲】[Claims] （１）　連続鋳造装置に用いられるモールド内に流入し
た溶融金属などの湯面レベルを測定する湯面レベル測定
装置において、前記モールド側面に近接した所定位置に
設けられ比較的低い周波数で励磁される磁化コイルと、
この磁化コイルに前記モールドを介して対向配置され、
前記磁化コイルにより発生し前記モールドに流入した前
記溶融金属内を通ってきた磁界を検出する検出コイルと
、この検出コイルの誘起電圧を前記磁化コイルの励磁周
波数に基づいて直流電圧に変換する同期検波部と。 この同期検波部の出力信号により前記湯面レベルを表示
する表示部とを具備したことを特徴とする湯面レベル測
定装置。(1) In a hot water level measuring device that measures the hot water level of molten metal, etc. that has flowed into a mold used in a continuous casting device, it is installed at a predetermined position close to the side surface of the mold and is excited at a relatively low frequency. a magnetizing coil;
disposed opposite to this magnetizing coil via the mold,
a detection coil that detects a magnetic field generated by the magnetization coil and passed through the molten metal that has flowed into the mold; and synchronous detection that converts the induced voltage of the detection coil into a DC voltage based on the excitation frequency of the magnetization coil. Department and. A hot water level measuring device comprising: a display unit that displays the hot water level based on the output signal of the synchronous detection unit. （２）　検出コイルは、前記磁化コイルに前記モールド
を介して２個互いに所定間隔をおいて配置したものでお
る特許請求の範囲第１項記載の湯面レベル測定装置。(2) The hot water level measuring device according to claim 1, wherein two detection coils are arranged on the magnetization coil with a predetermined distance from each other via the mold.
JP23394383A 1983-12-12 1983-12-12 Measuring device for level of molten metal surface Pending JPS60127060A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23394383A JPS60127060A (en) 1983-12-12 1983-12-12 Measuring device for level of molten metal surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23394383A JPS60127060A (en) 1983-12-12 1983-12-12 Measuring device for level of molten metal surface

Publications (1)

Publication Number Publication Date
JPS60127060A true JPS60127060A (en) 1985-07-06

Family

ID=16963044

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23394383A Pending JPS60127060A (en) 1983-12-12 1983-12-12 Measuring device for level of molten metal surface

Country Status (1)

Country Link
JP (1) JPS60127060A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03105219A (en) * 1989-09-19 1991-05-02 Nippon Steel Corp Detection of level of molten metal
JPH03122526A (en) * 1989-10-05 1991-05-24 Nippon Steel Corp Detection of level of molten metal
JPH03138536A (en) * 1989-10-25 1991-06-12 Nippon Steel Corp Method for detecting top surface position of molten metal
WO2001006217A1 (en) * 1999-07-16 2001-01-25 Pohang Iron & Steel Co., Ltd. Apparatus and method for measuring the molten metal level in electromagnetic continuous casting
KR100405525B1 (en) * 1998-12-09 2004-03-22 주식회사 포스코 Surface Detection Device in Electromagnetic Continuous Casting
KR100482219B1 (en) * 2000-07-06 2005-04-13 주식회사 포스코 Apparatus and method for measuring the molten metal level in electromagnetic continuous casting
RU206007U1 (en) * 2021-03-24 2021-08-16 федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") DEVICE FOR DETERMINING THE LEVEL OF MELTED METAL IN INDUCTION UNIT

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03105219A (en) * 1989-09-19 1991-05-02 Nippon Steel Corp Detection of level of molten metal
JPH03122526A (en) * 1989-10-05 1991-05-24 Nippon Steel Corp Detection of level of molten metal
JPH03138536A (en) * 1989-10-25 1991-06-12 Nippon Steel Corp Method for detecting top surface position of molten metal
KR100405525B1 (en) * 1998-12-09 2004-03-22 주식회사 포스코 Surface Detection Device in Electromagnetic Continuous Casting
WO2001006217A1 (en) * 1999-07-16 2001-01-25 Pohang Iron & Steel Co., Ltd. Apparatus and method for measuring the molten metal level in electromagnetic continuous casting
EP1133678A1 (en) * 1999-07-16 2001-09-19 POHANG IRON & STEEL CO., LTD. Apparatus and method for measuring the molten metal level in electromagnetic continuous casting
US6517604B1 (en) 1999-07-16 2003-02-11 Pohang Iron & Steel Co., Ltd. Apparatus and method for measuring the molten metal level in electromagnetic continuous casting
EP1133678A4 (en) * 1999-07-16 2005-07-27 Po Hang Iron & Steel Apparatus and method for measuring the molten metal level in electromagnetic continuous casting
KR100482219B1 (en) * 2000-07-06 2005-04-13 주식회사 포스코 Apparatus and method for measuring the molten metal level in electromagnetic continuous casting
RU206007U1 (en) * 2021-03-24 2021-08-16 федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") DEVICE FOR DETERMINING THE LEVEL OF MELTED METAL IN INDUCTION UNIT

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