JPS56137217A - Electromagnetic induction-type liquid level gage - Google Patents

Electromagnetic induction-type liquid level gage

Info

Publication number
JPS56137217A
JPS56137217A JP4033480A JP4033480A JPS56137217A JP S56137217 A JPS56137217 A JP S56137217A JP 4033480 A JP4033480 A JP 4033480A JP 4033480 A JP4033480 A JP 4033480A JP S56137217 A JPS56137217 A JP S56137217A
Authority
JP
Japan
Prior art keywords
coils
pulse
coil
small
detecting
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
JP4033480A
Other languages
Japanese (ja)
Inventor
Tatsuo Hamada
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4033480A priority Critical patent/JPS56137217A/en
Publication of JPS56137217A publication Critical patent/JPS56137217A/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)

Abstract

PURPOSE:To obtain an electromagnetic induction liquid level gage with high accuracy and strong noise resistance, in a number-counting coil consisting of small coils connectd to each other in opposite directions, by arranging the lowermost coils with deviation from an excitation coil. CONSTITUTION:An excitation coil, which is supplied with voltage by a power source 2, is detected by detecting coils A-D, in which small coils are alternately connected to GA-GD in opposite directions, and converted into a pulse by pulse generators 3A-3D which generate pulses every time it passes a set voltage. When the lowermost coils of all the detecting coils are provided with a deviation DELTAL by a small coil, and as length of a single coil and interval between coils are set to the same level, pulses HA and HC, HB and HD are generated at the same time, and since induction voltages at the time when the high conductive liquid is going up and down become opposite to each other, if pulse count is conducted by detecting polarity of pulse and simultaneousness of the pulse by a pulse-treating circuit 4, liquid surface becomes able to be measured with high accuracy by thus counted number.
JP4033480A 1980-03-31 1980-03-31 Electromagnetic induction-type liquid level gage Pending JPS56137217A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4033480A JPS56137217A (en) 1980-03-31 1980-03-31 Electromagnetic induction-type liquid level gage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4033480A JPS56137217A (en) 1980-03-31 1980-03-31 Electromagnetic induction-type liquid level gage

Publications (1)

Publication Number Publication Date
JPS56137217A true JPS56137217A (en) 1981-10-27

Family

ID=12577718

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4033480A Pending JPS56137217A (en) 1980-03-31 1980-03-31 Electromagnetic induction-type liquid level gage

Country Status (1)

Country Link
JP (1) JPS56137217A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013013318A (en) * 2009-03-13 2013-01-17 Mitsubishi Electric Corp Non-contact power receiving/feeding apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013013318A (en) * 2009-03-13 2013-01-17 Mitsubishi Electric Corp Non-contact power receiving/feeding apparatus

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