JPS57132023A - Liquid level sensor by optical fiber - Google Patents

Liquid level sensor by optical fiber

Info

Publication number
JPS57132023A
JPS57132023A JP56016926A JP1692681A JPS57132023A JP S57132023 A JPS57132023 A JP S57132023A JP 56016926 A JP56016926 A JP 56016926A JP 1692681 A JP1692681 A JP 1692681A JP S57132023 A JPS57132023 A JP S57132023A
Authority
JP
Japan
Prior art keywords
angle
fiber
liquid level
thetac1
thetac0
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
JP56016926A
Other languages
Japanese (ja)
Inventor
Yoshinori Higuchi
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 JP56016926A priority Critical patent/JPS57132023A/en
Priority to DE19813139893 priority patent/DE3139893A1/en
Priority to FR8118950A priority patent/FR2492148B1/en
Priority to US06/309,754 priority patent/US4450495A/en
Publication of JPS57132023A publication Critical patent/JPS57132023A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
    • G11B25/06—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using web-form record carriers, e.g. tape
    • G11B25/063—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using web-form record carriers, e.g. tape using tape inside container
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B31/00—Arrangements for the associated working of recording or reproducing apparatus with related apparatus
    • G11B31/003—Arrangements for the associated working of recording or reproducing apparatus with related apparatus with radio receiver
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/08—Constructional details, e.g. cabinet
    • H04B1/086—Portable receivers
    • H04B1/088—Portable receivers with parts of the receiver detachable or collapsible
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

PURPOSE:To detect liquid levels distinctly by forming the end face of an optical fiber to a circular cone shape at such an angle at which the direction of reflection varies according to whether said fiber is in water or in air. CONSTITUTION:A core 1 is enveloped with a clad layer 2, and the leading end of a fiber is provided with a reflection film 3, and is formed to a circular cone shape of a vertex theta0. If the angle that the normal of the circular cone shaped face and the axial line of the fiber assume is defined as thetai, the incident angle of the critical angle at which the light propagating in the core 1 totally reflects while the leading end is in air is defined as thetaC0, and the critical angle at which the light is transmitted while the leading end is in water as thetaC1, the light reflects totally in air and transmits in water at thetaC0<thetai<thetaC1. Desired conditions are obtained by setting the angle of the vertex theta0 at the angle satisfying thetaC0< 90 deg.-2theta0<thetaC1 from the relation angle thetai=90 deg.-2theta0. It is possible to know whether a liquid level sensor 5 is in the liquid level to be detected or not by using such sensor 5 and using a light emitting element 6, a photodetector 7 and a directional coupler 8.
JP56016926A 1980-10-09 1981-02-09 Liquid level sensor by optical fiber Pending JPS57132023A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP56016926A JPS57132023A (en) 1981-02-09 1981-02-09 Liquid level sensor by optical fiber
DE19813139893 DE3139893A1 (en) 1980-10-09 1981-10-07 PORTABLE ACOUSTIC DEVICE
FR8118950A FR2492148B1 (en) 1980-10-09 1981-10-08 PORTABLE SOUND APPARATUS
US06/309,754 US4450495A (en) 1980-10-09 1981-10-08 Portable acoustic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56016926A JPS57132023A (en) 1981-02-09 1981-02-09 Liquid level sensor by optical fiber

Publications (1)

Publication Number Publication Date
JPS57132023A true JPS57132023A (en) 1982-08-16

Family

ID=11929726

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56016926A Pending JPS57132023A (en) 1980-10-09 1981-02-09 Liquid level sensor by optical fiber

Country Status (1)

Country Link
JP (1) JPS57132023A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59500781A (en) * 1982-04-08 1984-05-04 ソシエテ　アノニム　デイツト：エス．テ−．デユポン A device for detecting the level of liquid in a storage container, in particular a liquefied gas in a storage container of a lighter, and a storage container equipped with a device of this kind.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5391779A (en) * 1977-01-24 1978-08-11 Ritsuo Hasumi Optical element for photoolevel meter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5391779A (en) * 1977-01-24 1978-08-11 Ritsuo Hasumi Optical element for photoolevel meter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59500781A (en) * 1982-04-08 1984-05-04 ソシエテ　アノニム　デイツト：エス．テ−．デユポン A device for detecting the level of liquid in a storage container, in particular a liquefied gas in a storage container of a lighter, and a storage container equipped with a device of this kind.

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