ZA923859B - 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
ZA923859B
ZA923859B ZA923859A ZA923859A ZA923859B ZA 923859 B ZA923859 B ZA 923859B ZA 923859 A ZA923859 A ZA 923859A ZA 923859 A ZA923859 A ZA 923859A ZA 923859 B ZA923859 B ZA 923859B
Authority
ZA
South Africa
Prior art keywords
determination
environment
condition
change
state
Prior art date
Application number
ZA923859A
Inventor
Barbara Lynn Jones
Lynn Jones Barbara
Original Assignee
De Beers Ind Diamond
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 Ind Diamond filed Critical De Beers Ind Diamond
Publication of ZA923859B publication Critical patent/ZA923859B/en

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)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
ZA923859A 1991-05-31 1992-05-27 Determination of the condition of or change in state of an environment ZA923859B (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 (1)

Publication Number Publication Date
ZA923859B true ZA923859B (en) 1993-02-24

Family

ID=10695907

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA923859A ZA923859B (en) 1991-05-31 1992-05-27 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

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240747A (en) * 1979-10-03 1980-12-23 Battelle Memorial Institute Refractive-index responsive light-signal system
CH652825A5 (en) * 1980-09-18 1985-11-29 Battelle Memorial Institute DUAL OPTICAL PROBE DEVICE FOR DETERMINING THE REFRACTION INDEX OF A FLUID RETURNED TO A PREDETERMINED REFERENCE TEMPERATURE.
JPS61198040A (en) * 1984-12-08 1986-09-02 テストターム・メステヒニーク・ゲー・エム・ベー・ハー・ウント・コンパニー Optical dew point sensor
US4639594A (en) * 1984-12-17 1987-01-27 Carrier Corporation Fiberoptic probe and method of making and using
GB2185308B (en) * 1986-01-10 1989-10-25 Stc Plc Optical sensor device
GB2223841A (en) * 1988-08-31 1990-04-18 Red Kite Tech Parameter measurement using refractive index change
GB8907467D0 (en) * 1989-04-03 1989-05-17 Secr Defence Thin film calorimeter
IL91614A (en) * 1989-09-12 1992-07-15 Israel Atomic Energy Comm Method of performing attenuated total reflection spectroscopy

Also Published As

Publication number Publication date
GB9111776D0 (en) 1991-07-24
GB2256270A (en) 1992-12-02
GB2256270B (en) 1995-04-19
GB9211352D0 (en) 1992-07-15

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