JPS56143922A - Waveform detecting method - Google Patents

Waveform detecting method

Info

Publication number
JPS56143922A
JPS56143922A JP4620880A JP4620880A JPS56143922A JP S56143922 A JPS56143922 A JP S56143922A JP 4620880 A JP4620880 A JP 4620880A JP 4620880 A JP4620880 A JP 4620880A JP S56143922 A JPS56143922 A JP S56143922A
Authority
JP
Japan
Prior art keywords
mold
detector
equation
phase angle
vibration
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
JP4620880A
Other languages
Japanese (ja)
Inventor
Yuichiro Inoue
Masamichi Sakaki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP4620880A priority Critical patent/JPS56143922A/en
Publication of JPS56143922A publication Critical patent/JPS56143922A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Continuous Casting (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

PURPOSE:To detect the phase difference between both vibrations by sampling the amplitude value of the vibration produced by arising from a known frequency. CONSTITUTION:A detector 17 which detects the vibration of a mold 2 and a detector 16 which detects the molten metal level in the mold 2 are provided in a continuous casting plant. When the mold 2 makes simple vibration of a frequency omega (known), the signal of (equation-1) appears in the output of the detector 17. Also, the signal of (equation-2) (alpha: phase angle) appears in the output of the detector for the molten level vibrating along with the mold. These outputs are sampled at the times t1, t2, t3, and (equation-3) is obtained, by which the phase angle alpha is determined. Simultaneously, wave crest a0, y-intercept b are determined as well. In this way, the phase angle alpha is measured accurately dispite the existence of time lag of first order in the response of the molten level detector. Hence, the molten metal level in the mold is accurately maintained.
JP4620880A 1980-04-10 1980-04-10 Waveform detecting method Pending JPS56143922A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4620880A JPS56143922A (en) 1980-04-10 1980-04-10 Waveform detecting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4620880A JPS56143922A (en) 1980-04-10 1980-04-10 Waveform detecting method

Publications (1)

Publication Number Publication Date
JPS56143922A true JPS56143922A (en) 1981-11-10

Family

ID=12740660

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4620880A Pending JPS56143922A (en) 1980-04-10 1980-04-10 Waveform detecting method

Country Status (1)

Country Link
JP (1) JPS56143922A (en)

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