GB2256270B - Determination of the condition of or change in state of an environment - Google Patents

Determination of the condition of or change in state of an environment

Info

Publication number
GB2256270B
GB2256270B GB9211352A GB9211352A GB2256270B GB 2256270 B GB2256270 B GB 2256270B GB 9211352 A GB9211352 A GB 9211352A GB 9211352 A GB9211352 A GB 9211352A GB 2256270 B GB2256270 B GB 2256270B
Authority
GB
United Kingdom
Prior art keywords
determination
environment
condition
change
state
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.)
Expired - Fee Related
Application number
GB9211352A
Other versions
GB9211352D0 (en
GB2256270A (en
Inventor
Barbara Lynn Jones
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.)
De Beers Industrial Diamond Division Pty Ltd
Original Assignee
De Beers Industrial Diamond Division Pty 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 De Beers Industrial Diamond Division Pty Ltd filed Critical De Beers Industrial Diamond Division Pty Ltd
Publication of GB9211352D0 publication Critical patent/GB9211352D0/en
Publication of GB2256270A publication Critical patent/GB2256270A/en
Application granted granted Critical
Publication of GB2256270B publication Critical patent/GB2256270B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
    • 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
    • G01F23/2925—Light, e.g. infrared or ultraviolet for discrete levels with light-conducting sensing elements, e.g. prisms using electrical detecting means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N2021/1738—Optionally different kinds of measurements; Method being valid for different kinds of measurement
    • G01N2021/1742—Optionally different kinds of measurements; Method being valid for different kinds of measurement either absorption or reflection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/94—Investigating contamination, e.g. dust
    • G01N2021/945—Liquid or solid deposits of macroscopic size on surfaces, e.g. drops, films, or clustered contaminants

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Health & Medical Sciences (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
GB9211352A 1991-05-31 1992-05-29 Determination of the condition of or change in state of an environment Expired - Fee Related GB2256270B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB919111776A GB9111776D0 (en) 1991-05-31 1991-05-31 Determination of the condition of or change in state of an environment

Publications (3)

Publication Number Publication Date
GB9211352D0 GB9211352D0 (en) 1992-07-15
GB2256270A GB2256270A (en) 1992-12-02
GB2256270B true GB2256270B (en) 1995-04-19

Family

ID=10695907

Family Applications (2)

Application Number Title Priority Date Filing Date
GB919111776A Pending GB9111776D0 (en) 1991-05-31 1991-05-31 Determination of the condition of or change in state of an environment
GB9211352A Expired - Fee Related GB2256270B (en) 1991-05-31 1992-05-29 Determination of the condition of or change in state of an environment

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB919111776A Pending GB9111776D0 (en) 1991-05-31 1991-05-31 Determination of the condition of or change in state of an environment

Country Status (2)

Country Link
GB (2) GB9111776D0 (en)
ZA (1) ZA923859B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015008200A1 (en) * 2015-06-26 2016-12-29 Hella Kgaa Hueck & Co. Sensor device for determining a level of a fluid in a vehicle

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089098A2 (en) * 1979-10-03 1983-09-21 Stanley Electric Co., Ltd. Refractive-index responsive light-signal system
EP0049220B1 (en) * 1980-09-18 1985-12-18 Stanley Electric Co., Ltd. Device with a double optical probe for determining the refractive index led back to a reference temperature in a fluid
GB2170004A (en) * 1984-12-08 1986-07-23 Testoterm Messtechnik Gmbh Co Apparatus for sensing fluids
US4639594A (en) * 1984-12-17 1987-01-27 Carrier Corporation Fiberoptic probe and method of making and using
GB2185308A (en) * 1986-01-10 1987-07-15 Stc Plc Optical waveguide material sensor
WO1990002322A1 (en) * 1988-08-31 1990-03-08 Red Kite Technology Limited Parameter measurement using refractive index change
GB2230855A (en) * 1989-04-03 1990-10-31 Secr Defence Thin film calorimeter
EP0417700A2 (en) * 1989-09-12 1991-03-20 THE STATE of ISRAEL Atomic Energy Commission Soreq Nuclear Research Center Improvement in attenuated total reflection spectroscopy

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089098A2 (en) * 1979-10-03 1983-09-21 Stanley Electric Co., Ltd. Refractive-index responsive light-signal system
EP0049220B1 (en) * 1980-09-18 1985-12-18 Stanley Electric Co., Ltd. Device with a double optical probe for determining the refractive index led back to a reference temperature in a fluid
GB2170004A (en) * 1984-12-08 1986-07-23 Testoterm Messtechnik Gmbh Co Apparatus for sensing fluids
US4639594A (en) * 1984-12-17 1987-01-27 Carrier Corporation Fiberoptic probe and method of making and using
GB2185308A (en) * 1986-01-10 1987-07-15 Stc Plc Optical waveguide material sensor
WO1990002322A1 (en) * 1988-08-31 1990-03-08 Red Kite Technology Limited Parameter measurement using refractive index change
GB2230855A (en) * 1989-04-03 1990-10-31 Secr Defence Thin film calorimeter
EP0417700A2 (en) * 1989-09-12 1991-03-20 THE STATE of ISRAEL Atomic Energy Commission Soreq Nuclear Research Center Improvement in attenuated total reflection spectroscopy

Also Published As

Publication number Publication date
ZA923859B (en) 1993-02-24
GB9211352D0 (en) 1992-07-15
GB9111776D0 (en) 1991-07-24
GB2256270A (en) 1992-12-02

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960529