JPS57151827A - Level detector for molten metal - Google Patents

Level detector for molten metal

Info

Publication number
JPS57151827A
JPS57151827A JP3631181A JP3631181A JPS57151827A JP S57151827 A JPS57151827 A JP S57151827A JP 3631181 A JP3631181 A JP 3631181A JP 3631181 A JP3631181 A JP 3631181A JP S57151827 A JPS57151827 A JP S57151827A
Authority
JP
Japan
Prior art keywords
molten metal
output
disturbing factors
detector
exciting current
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
JP3631181A
Other languages
Japanese (ja)
Inventor
Sunao Atsumi
Masazumi Mitsumizo
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP3631181A priority Critical patent/JPS57151827A/en
Publication of JPS57151827A publication Critical patent/JPS57151827A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (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 detect the exact level of molten metal removing effect from disturbing factors by computing the output of a detection coil when the exciting current of a varied frequency is applied to a generating coil approaching the surface of the molten metal with a switching of more than one oscillators. CONSTITUTION:The exciting current of a fixed frequency is applied to a generating coil 4 through a switch 9 from one 8a of oscillators 8 arranged in the number according to the number of disturbing factors and the intensity of the secondary magnetic field accompanied by an eddy current generated with an intensity depending on the distance from the surface 2a of a molten metal is detected with a detector through a detection coil 5. The output of the detector is provided to an arithmetic unit 14. Then, with the changeover of the switch 9, an exciting current is applied to the generating coil 4 in a different frequency and likewise, the output of the detector 11 is provided to the arithmetic unit 14, where a computation will be done to correct changes in the output due to disturbing factors. This eliminates effect from disturbing factors enabling the indication 16 of an exact level of the molten metal.
JP3631181A 1981-03-13 1981-03-13 Level detector for molten metal Pending JPS57151827A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3631181A JPS57151827A (en) 1981-03-13 1981-03-13 Level detector for molten metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3631181A JPS57151827A (en) 1981-03-13 1981-03-13 Level detector for molten metal

Publications (1)

Publication Number Publication Date
JPS57151827A true JPS57151827A (en) 1982-09-20

Family

ID=12466295

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3631181A Pending JPS57151827A (en) 1981-03-13 1981-03-13 Level detector for molten metal

Country Status (1)

Country Link
JP (1) JPS57151827A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010055792A (en) * 1999-12-13 2001-07-04 신현준 Method to measure the level of molten steel in an electromagnetic casting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010055792A (en) * 1999-12-13 2001-07-04 신현준 Method to measure the level of molten steel in an electromagnetic casting

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