JPS5739316A - Liquid level detecting sensor - Google Patents

Liquid level detecting sensor

Info

Publication number
JPS5739316A
JPS5739316A JP11500580A JP11500580A JPS5739316A JP S5739316 A JPS5739316 A JP S5739316A JP 11500580 A JP11500580 A JP 11500580A JP 11500580 A JP11500580 A JP 11500580A JP S5739316 A JPS5739316 A JP S5739316A
Authority
JP
Japan
Prior art keywords
liquid level
detecting sensor
level detecting
optical fibers
fibers
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.)
Granted
Application number
JP11500580A
Other languages
Japanese (ja)
Other versions
JPS6217173B2 (en
Inventor
Naonari Sasano
Nobuo Kobata
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.)
SWCC Corp
Original Assignee
Showa Electric Wire and Cable Co
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 Showa Electric Wire and Cable Co filed Critical Showa Electric Wire and Cable Co
Priority to JP11500580A priority Critical patent/JPS5739316A/en
Publication of JPS5739316A publication Critical patent/JPS5739316A/en
Publication of JPS6217173B2 publication Critical patent/JPS6217173B2/ja
Granted 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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (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 a liquid level detecting sensor of less light propagation by sticking the end parts of plural optical fibers having core and clads by fusion to one body thereby forming a spherical part. CONSTITUTION:The end parts of two pieces of optical fibers 3, 4 aligned to parallel are stuck by fusion to one body, whereby a spherical part 5 is formed to the stuck part. The fibers 3, 4 consits of cores 6, and clads 7 having a refractive index smaller than that of the cores 6. If the optical fibers consituting the liquid level detecting sensor are constituted in this way, some of the light propagating from the fiber partly leaks to the outside in the route of an arrow B3, but if the spherical part 5 is so formed that the tangent at the top end of said part goes parallel to the maximum angle theta3 of the spread of the light emitting when the radius of curvature of the part 5 is cut at the plane perpendicular to the fibers 3, 4, the quantity of the light entering the core 6 of the fiber 3 in the route of an arrow B1 increases.
JP11500580A 1980-08-20 1980-08-20 Liquid level detecting sensor Granted JPS5739316A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11500580A JPS5739316A (en) 1980-08-20 1980-08-20 Liquid level detecting sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11500580A JPS5739316A (en) 1980-08-20 1980-08-20 Liquid level detecting sensor

Publications (2)

Publication Number Publication Date
JPS5739316A true JPS5739316A (en) 1982-03-04
JPS6217173B2 JPS6217173B2 (en) 1987-04-16

Family

ID=14651926

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11500580A Granted JPS5739316A (en) 1980-08-20 1980-08-20 Liquid level detecting sensor

Country Status (1)

Country Link
JP (1) JPS5739316A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5773628A (en) * 1980-10-27 1982-05-08 Showa Electric Wire & Cable Co Ltd Oil level detector
JPS59131027U (en) * 1983-02-23 1984-09-03 昭和電線電纜株式会社 liquid detection device
JPS61191923A (en) * 1985-02-20 1986-08-26 Nippon Kokan Kk <Nkk> Dry up detector
JPS62160352U (en) * 1986-03-31 1987-10-12
JPH01138425A (en) * 1988-07-29 1989-05-31 Showa Electric Wire & Cable Co Ltd Liquid identifying method
JPH02218925A (en) * 1989-02-20 1990-08-31 Fujikura Ltd Liquid level sensor

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5773628A (en) * 1980-10-27 1982-05-08 Showa Electric Wire & Cable Co Ltd Oil level detector
JPS59131027U (en) * 1983-02-23 1984-09-03 昭和電線電纜株式会社 liquid detection device
JPS61191923A (en) * 1985-02-20 1986-08-26 Nippon Kokan Kk <Nkk> Dry up detector
JPH0358650B2 (en) * 1985-02-20 1991-09-06 Nippon Kokan Kk
JPS62160352U (en) * 1986-03-31 1987-10-12
JPH01138425A (en) * 1988-07-29 1989-05-31 Showa Electric Wire & Cable Co Ltd Liquid identifying method
JPH02218925A (en) * 1989-02-20 1990-08-31 Fujikura Ltd Liquid level sensor

Also Published As

Publication number Publication date
JPS6217173B2 (en) 1987-04-16

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