GB2002905A - Liquid level indicator apparatus - Google Patents

Liquid level indicator apparatus

Info

Publication number
GB2002905A
GB2002905A GB7835948A GB7835948A GB2002905A GB 2002905 A GB2002905 A GB 2002905A GB 7835948 A GB7835948 A GB 7835948A GB 7835948 A GB7835948 A GB 7835948A GB 2002905 A GB2002905 A GB 2002905A
Authority
GB
United Kingdom
Prior art keywords
elements
liquid
prisms
prism
liquid level
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.)
Withdrawn
Application number
GB7835948A
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.)
Rolls Royce Power Engineering PLC
Original Assignee
Northern Engineering Industries PLC
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 Northern Engineering Industries PLC filed Critical Northern Engineering Industries PLC
Priority to GB7835948A priority Critical patent/GB2002905A/en
Publication of GB2002905A publication Critical patent/GB2002905A/en
Withdrawn legal-status Critical Current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
    • G01F23/2921—Light, e.g. infrared or ultraviolet for discrete levels
    • G01F23/2922—Light, e.g. infrared or ultraviolet for discrete levels with light-conducting sensing elements, e.g. prisms
    • G01F23/2924—Light, e.g. infrared or ultraviolet for discrete levels with light-conducting sensing elements, e.g. prisms for several discrete levels, e.g. with more than one light-conducting sensing element

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

Apparatus for indicating the level 32 of liquid in a tank using fibre optics in which an elongate prism or an elongate series of prisms 20 is arranged other than parallel to the surface of the liquid. Optic fibre elements 18, 26 terminate at the prism or prisms which are between ends of the elements in the optical path defined by the elements leading from a lamp 12 to an indicator station 30. Liquid level is indicated by the illumination of ends 28, of one series of elements according to which prisms or which part of the prism is in the liquid. In an alternative, floats are arranged to interrupt the optical path between ends of the fibre elements. The principal use of the invention is in road petrol tankers to reduce fire hazards. <IMAGE>
GB7835948A 1977-07-27 1978-09-07 Liquid level indicator apparatus Withdrawn GB2002905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7835948A GB2002905A (en) 1977-07-27 1978-09-07 Liquid level indicator apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3148577 1977-07-27
GB7835948A GB2002905A (en) 1977-07-27 1978-09-07 Liquid level indicator apparatus

Publications (1)

Publication Number Publication Date
GB2002905A true GB2002905A (en) 1979-02-28

Family

ID=26260932

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7835948A Withdrawn GB2002905A (en) 1977-07-27 1978-09-07 Liquid level indicator apparatus

Country Status (1)

Country Link
GB (1) GB2002905A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4286464A (en) * 1980-01-14 1981-09-01 Technical Development Company Optical fluid level monitor
EP0058056A2 (en) * 1981-02-11 1982-08-18 Anderson Strathclyde Plc Apparatus for and method of continual remote monitoring of a local condition of a liquid in a machine part
FR2512551A1 (en) * 1981-09-09 1983-03-11 Cortaillod Cables Sa Optical sensor for detecting change in fluidic optical medium - has transmitting and receiving optical fibres directed to provide divergent beam through medium to totally reflecting prism
GB2121175A (en) * 1982-06-01 1983-12-14 Shell Int Research Liquid level measurement
GB2133876A (en) * 1982-12-15 1984-08-01 Westfaelische Metall Industrie Apparatus for measuring or monitoring the fullness of a liquid container
EP0124415A1 (en) * 1983-04-22 1984-11-07 Electricite De France Optical sensor
FR2560679A1 (en) * 1984-03-01 1985-09-06 Mors Electricite Level gauge for liquid tank, particularly for an aircraft
DE3606847A1 (en) * 1986-03-03 1987-09-24 Schott Glaswerke FIBER OPTICAL SENSOR FOR LIQUID LEVEL INDICATOR OR LEVEL CONTROL
EP0846942A2 (en) * 1996-12-06 1998-06-10 Ingenjörsfirma Ultrac AB Detection device for monitoring spaces in culverts and method for carrying through said monitoring
GB2425830A (en) * 2005-04-25 2006-11-08 Boeing Co Systems and methods for fluid level detection

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4286464A (en) * 1980-01-14 1981-09-01 Technical Development Company Optical fluid level monitor
EP0058056A2 (en) * 1981-02-11 1982-08-18 Anderson Strathclyde Plc Apparatus for and method of continual remote monitoring of a local condition of a liquid in a machine part
EP0058056A3 (en) * 1981-02-11 1985-01-23 Anderson Strathclyde Plc Apparatus for and method of continual remote monitoring of a local condition of a liquid in a machine part
FR2512551A1 (en) * 1981-09-09 1983-03-11 Cortaillod Cables Sa Optical sensor for detecting change in fluidic optical medium - has transmitting and receiving optical fibres directed to provide divergent beam through medium to totally reflecting prism
GB2121175A (en) * 1982-06-01 1983-12-14 Shell Int Research Liquid level measurement
GB2133876A (en) * 1982-12-15 1984-08-01 Westfaelische Metall Industrie Apparatus for measuring or monitoring the fullness of a liquid container
US4713552A (en) * 1983-04-22 1987-12-15 Electricite De France (Service National) Optical probe
EP0124415A1 (en) * 1983-04-22 1984-11-07 Electricite De France Optical sensor
WO1984004384A1 (en) * 1983-04-22 1984-11-08 Electricite De France Optical probe
FR2560679A1 (en) * 1984-03-01 1985-09-06 Mors Electricite Level gauge for liquid tank, particularly for an aircraft
DE3606847A1 (en) * 1986-03-03 1987-09-24 Schott Glaswerke FIBER OPTICAL SENSOR FOR LIQUID LEVEL INDICATOR OR LEVEL CONTROL
EP0846942A2 (en) * 1996-12-06 1998-06-10 Ingenjörsfirma Ultrac AB Detection device for monitoring spaces in culverts and method for carrying through said monitoring
EP0846942A3 (en) * 1996-12-06 1999-04-28 Ingenjörsfirma Ultrac AB Detection device for monitoring spaces in culverts and method for carrying through said monitoring
GB2425830A (en) * 2005-04-25 2006-11-08 Boeing Co Systems and methods for fluid level detection
GB2425830B (en) * 2005-04-25 2007-07-11 Boeing Co Systems and methods for fluid level detection
US7259384B2 (en) 2005-04-25 2007-08-21 The Boeing Company Fluid level optical detector with float having opaque and transmissive portions

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)