FR2626076B1 - DEVICE FOR DETECTING VARIATIONS IN TRANSPARENCY OF AN ATMOSPHERE TO BE MONITORED - Google Patents

DEVICE FOR DETECTING VARIATIONS IN TRANSPARENCY OF AN ATMOSPHERE TO BE MONITORED

Info

Publication number
FR2626076B1
FR2626076B1 FR8800561A FR8800561A FR2626076B1 FR 2626076 B1 FR2626076 B1 FR 2626076B1 FR 8800561 A FR8800561 A FR 8800561A FR 8800561 A FR8800561 A FR 8800561A FR 2626076 B1 FR2626076 B1 FR 2626076B1
Authority
FR
France
Prior art keywords
transparency
monitored
atmosphere
detecting variations
variations
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 - Lifetime
Application number
FR8800561A
Other languages
French (fr)
Other versions
FR2626076A1 (en
Inventor
J-L Gaumet
P Salomon
J-J Thery
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.)
Etat Francais
Original Assignee
Etat Francais
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 Etat Francais filed Critical Etat Francais
Priority to FR8800561A priority Critical patent/FR2626076B1/en
Publication of FR2626076A1 publication Critical patent/FR2626076A1/en
Application granted granted Critical
Publication of FR2626076B1 publication Critical patent/FR2626076B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
    • G01N21/538—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke for determining atmospheric attenuation and visibility
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/16—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void using electric radiation detectors
    • G01J1/1626—Arrangements with two photodetectors, the signals of which are compared
    • G01J2001/1636—Arrangements with two photodetectors, the signals of which are compared one detector directly monitoring the source, e.g. also impulse time controlling
    • 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
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N2021/4704—Angular selective
    • G01N2021/4711—Multiangle measurement
FR8800561A 1988-01-19 1988-01-19 DEVICE FOR DETECTING VARIATIONS IN TRANSPARENCY OF AN ATMOSPHERE TO BE MONITORED Expired - Lifetime FR2626076B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8800561A FR2626076B1 (en) 1988-01-19 1988-01-19 DEVICE FOR DETECTING VARIATIONS IN TRANSPARENCY OF AN ATMOSPHERE TO BE MONITORED

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8800561A FR2626076B1 (en) 1988-01-19 1988-01-19 DEVICE FOR DETECTING VARIATIONS IN TRANSPARENCY OF AN ATMOSPHERE TO BE MONITORED

Publications (2)

Publication Number Publication Date
FR2626076A1 FR2626076A1 (en) 1989-07-21
FR2626076B1 true FR2626076B1 (en) 1990-12-21

Family

ID=9362443

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8800561A Expired - Lifetime FR2626076B1 (en) 1988-01-19 1988-01-19 DEVICE FOR DETECTING VARIATIONS IN TRANSPARENCY OF AN ATMOSPHERE TO BE MONITORED

Country Status (1)

Country Link
FR (1) FR2626076B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2663128B1 (en) * 1990-06-06 1992-11-27 France Etat METHOD FOR AUTOMATIC IDENTIFICATION OF HYDROMETEORES.
FR3079614B1 (en) * 2018-03-30 2024-04-12 Syscience METHOD AND DEVICE FOR MEASURING VISIBILITY CONDITIONS

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1382011A (en) * 1964-02-11 1964-12-14 Signaling device for fog warning control
GB1168483A (en) * 1965-09-30 1969-10-29 Hoffman Electronics Corp Backscatter Fog Measuring Instrument
SE369964B (en) * 1973-01-18 1974-09-23 Satt Elektronik Ab
JPS5483491A (en) * 1977-12-15 1979-07-03 Matsushita Electric Ind Co Ltd Smoke detector
US4417812A (en) * 1981-03-03 1983-11-29 Medicor Muvek Circuit arrangement for determining the characteristics of liquids and/or gases, in particular the hemoglobin content of the blood

Also Published As

Publication number Publication date
FR2626076A1 (en) 1989-07-21

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse