JPS5761918A - Level sensor - Google Patents

Level sensor

Info

Publication number
JPS5761918A
JPS5761918A JP13789280A JP13789280A JPS5761918A JP S5761918 A JPS5761918 A JP S5761918A JP 13789280 A JP13789280 A JP 13789280A JP 13789280 A JP13789280 A JP 13789280A JP S5761918 A JPS5761918 A JP S5761918A
Authority
JP
Japan
Prior art keywords
frequency
detector
coil
coaxial cable
inductive
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
JP13789280A
Other languages
Japanese (ja)
Inventor
Hiroshi Kamiyama
Tadashi Kameoka
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.)
ATOU DENKI KK
Original Assignee
ATOU DENKI KK
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 ATOU DENKI KK filed Critical ATOU DENKI KK
Priority to JP13789280A priority Critical patent/JPS5761918A/en
Publication of JPS5761918A publication Critical patent/JPS5761918A/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)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

PURPOSE:To eliminate the use of a high frequency coaxial cable and furthermore to simplify the wiring as well as to realize a control from a remote place, by providing a signal applying circuit separately from a high-frequency generating part and a base circuit. CONSTITUTION:A high-frequency signal given from a detector 7 produces an inductive frequency to an induction coil L3 via a main coil L2. A high frequency is attenuated when the inductive frequency is approximate to the high frequency applied from a high-frequency generating part 3 of a control part 2. Based on this attenuation of high frequency, a relay RY is actuated. Then a signal applying circuit 6 that applies the high-frequency signal current given from the detector 7 is installed separaely from the part 3 and a base circuit 5 including the coil L3. Accordingly, a connection line 8 between the detector 7 and the part 2 receives no external effect, which eliminates the use of a high-frequency coaxial cable.
JP13789280A 1980-10-01 1980-10-01 Level sensor Pending JPS5761918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13789280A JPS5761918A (en) 1980-10-01 1980-10-01 Level sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13789280A JPS5761918A (en) 1980-10-01 1980-10-01 Level sensor

Publications (1)

Publication Number Publication Date
JPS5761918A true JPS5761918A (en) 1982-04-14

Family

ID=15209109

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13789280A Pending JPS5761918A (en) 1980-10-01 1980-10-01 Level sensor

Country Status (1)

Country Link
JP (1) JPS5761918A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014238766A (en) * 2013-06-10 2014-12-18 日本電信電話株式会社 Sensor circuit
JP2014238765A (en) * 2013-06-10 2014-12-18 日本電信電話株式会社 Array sensor circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014238766A (en) * 2013-06-10 2014-12-18 日本電信電話株式会社 Sensor circuit
JP2014238765A (en) * 2013-06-10 2014-12-18 日本電信電話株式会社 Array sensor circuit

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