JPS56147018A - Liquid level gage for liquid helium - Google Patents

Liquid level gage for liquid helium

Info

Publication number
JPS56147018A
JPS56147018A JP5113980A JP5113980A JPS56147018A JP S56147018 A JPS56147018 A JP S56147018A JP 5113980 A JP5113980 A JP 5113980A JP 5113980 A JP5113980 A JP 5113980A JP S56147018 A JPS56147018 A JP S56147018A
Authority
JP
Japan
Prior art keywords
wire
switch
liquid
circuit
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
JP5113980A
Other languages
Japanese (ja)
Inventor
Masao Morita
Tadatoshi Yamada
Masatami Iwamoto
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP5113980A priority Critical patent/JPS56147018A/en
Publication of JPS56147018A publication Critical patent/JPS56147018A/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
    • G01F23/24—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 resistance of resistors due to contact with conductor fluid

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

PURPOSE:To decrease Joule losses of a superconductive wire and suppress the evaporation of liquid helium by flowing electric current intermittently to the superconductive wire. CONSTITUTION:Both ends of a superconductive wire 1 are connected via a switch 6 to both poles of a DC power source 4. The switch 6 intermittently flows electric current to the wire 1. A holding circuit 7 is connected to both ends of the wire 1, and the circuit 7 is connected to a voltmeter 5. While no current is being flowed to the wire 1, the circuit 7 holds the output voltage across the voltage terminal when the current had been flowed to the wire 1. If the opening and closing of the switch 6 are performed at a ratio of 9 to 1, the Joule loss in the part of the nonimmersed part l2 of the wire 1 is decreased to 1/10.
JP5113980A 1980-04-16 1980-04-16 Liquid level gage for liquid helium Pending JPS56147018A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5113980A JPS56147018A (en) 1980-04-16 1980-04-16 Liquid level gage for liquid helium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5113980A JPS56147018A (en) 1980-04-16 1980-04-16 Liquid level gage for liquid helium

Publications (1)

Publication Number Publication Date
JPS56147018A true JPS56147018A (en) 1981-11-14

Family

ID=12878481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5113980A Pending JPS56147018A (en) 1980-04-16 1980-04-16 Liquid level gage for liquid helium

Country Status (1)

Country Link
JP (1) JPS56147018A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6110722A (en) * 1984-06-25 1986-01-18 Kobe Steel Ltd Liquid-level measuring method of liquid helium
US5114907A (en) * 1991-03-15 1992-05-19 Illinois Superconductor Corporation Cryogenic fluid level sensor
US5593949A (en) * 1993-07-06 1997-01-14 Lockheed Martin Corporation High temperature conductor probes for determining liquid level of cryogens

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5332059A (en) * 1976-09-06 1978-03-25 Hokusan Kk Liquid level detector using superconductive wire for liquefied gas of extremely low temperature

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5332059A (en) * 1976-09-06 1978-03-25 Hokusan Kk Liquid level detector using superconductive wire for liquefied gas of extremely low temperature

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6110722A (en) * 1984-06-25 1986-01-18 Kobe Steel Ltd Liquid-level measuring method of liquid helium
JPH0311650B2 (en) * 1984-06-25 1991-02-18 Kobe Steel Ltd
US5114907A (en) * 1991-03-15 1992-05-19 Illinois Superconductor Corporation Cryogenic fluid level sensor
US5593949A (en) * 1993-07-06 1997-01-14 Lockheed Martin Corporation High temperature conductor probes for determining liquid level of cryogens

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