JPS57110921A - Molten metal gauge - Google Patents

Molten metal gauge

Info

Publication number
JPS57110921A
JPS57110921A JP18524880A JP18524880A JPS57110921A JP S57110921 A JPS57110921 A JP S57110921A JP 18524880 A JP18524880 A JP 18524880A JP 18524880 A JP18524880 A JP 18524880A JP S57110921 A JPS57110921 A JP S57110921A
Authority
JP
Japan
Prior art keywords
light beam
molten metal
modulated
guided
phase difference
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
JP18524880A
Other languages
Japanese (ja)
Inventor
Yasuo Oda
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
Sumitomo Metal Industries 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP18524880A priority Critical patent/JPS57110921A/en
Publication of JPS57110921A publication Critical patent/JPS57110921A/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
    • G01F23/28—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

Abstract

PURPOSE:To make it possible to manufacture a molten metal level gauge of high response speed and high precision by causing a light beam modulated by a specified frequency to reflect at the surface of molten metal and by measuring the phase difference between the modulated light beam and the reflected light beam. CONSTITUTION:A light beam from a light beam generating source is modulated by a specified frequency and guided to the surface of molten metal to reflect, and it is photoelectrically converted and phase difference between the modulated and reflected light beams is detected and the level of molten metal is measured. For example, a light beam from a laser beam generator 21 is modulated by a KDP modulation cell 22 connected to a modulation oscillator 31 and guided to molten metal 4 through reflecting mirrors 23, 24 and an objective reflecting mirror 11 in an optical guide 1. Next, its reflected light beam is received by a photoelectric conversion element 26 through a lens 25 and its signal is guided to a phase difference meter 33 through an amplifier 32 and its phase is compared with the phase of the light beam from said modulation oscillator, and the distance to molten metal is measured by an operation circuit 34.
JP18524880A 1980-12-27 1980-12-27 Molten metal gauge Pending JPS57110921A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18524880A JPS57110921A (en) 1980-12-27 1980-12-27 Molten metal gauge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18524880A JPS57110921A (en) 1980-12-27 1980-12-27 Molten metal gauge

Publications (1)

Publication Number Publication Date
JPS57110921A true JPS57110921A (en) 1982-07-10

Family

ID=16167477

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18524880A Pending JPS57110921A (en) 1980-12-27 1980-12-27 Molten metal gauge

Country Status (1)

Country Link
JP (1) JPS57110921A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6376745A (en) * 1986-09-18 1988-04-07 Sumitomo Metal Ind Ltd Measuring instrument for powder layer thickness in continuous casting mold

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6376745A (en) * 1986-09-18 1988-04-07 Sumitomo Metal Ind Ltd Measuring instrument for powder layer thickness in continuous casting mold

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