CA996769A - Visibility meter using multiple light beams - Google Patents

Visibility meter using multiple light beams

Info

Publication number
CA996769A
CA996769A CA190,429A CA190429A CA996769A CA 996769 A CA996769 A CA 996769A CA 190429 A CA190429 A CA 190429A CA 996769 A CA996769 A CA 996769A
Authority
CA
Canada
Prior art keywords
light beams
multiple light
visibility meter
visibility
meter
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
Application number
CA190,429A
Other languages
English (en)
Other versions
CA190429S (en
Inventor
Hans L. Hallengren
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.)
Satt Elektronik AB
Original Assignee
Satt Elektronik AB
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 Satt Elektronik AB filed Critical Satt Elektronik AB
Application granted granted Critical
Publication of CA996769A publication Critical patent/CA996769A/en
Expired 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
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/95—Lidar systems specially adapted for specific applications for meteorological use
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Health & Medical Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Chemical & Material Sciences (AREA)
  • Electromagnetism (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Geophysics And Detection Of Objects (AREA)
CA190,429A 1973-01-18 1974-01-17 Visibility meter using multiple light beams Expired CA996769A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7300716A SE369964B (zh) 1973-01-18 1973-01-18

Publications (1)

Publication Number Publication Date
CA996769A true CA996769A (en) 1976-09-14

Family

ID=20316366

Family Applications (1)

Application Number Title Priority Date Filing Date
CA190,429A Expired CA996769A (en) 1973-01-18 1974-01-17 Visibility meter using multiple light beams

Country Status (6)

Country Link
US (1) US3901812A (zh)
CA (1) CA996769A (zh)
DE (1) DE2401906C3 (zh)
FR (1) FR2214897B3 (zh)
GB (1) GB1459928A (zh)
SE (1) SE369964B (zh)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4053785A (en) * 1976-01-07 1977-10-11 General Signal Corporation Optical smoke detector with smoke effect simulating means
US4045675A (en) * 1976-07-12 1977-08-30 General Electric Company Solid state radiation detector system
US4560874A (en) * 1981-06-02 1985-12-24 Santa Barbara Research Center Reference channel for sensing optical contamination
FR2584497B1 (fr) * 1985-07-04 1988-07-08 Jaeger Procede et dispositif pour la detection du brouillard et son application a l'aide a la conduite d'un vehicule.
EP0208610B1 (fr) * 1985-07-04 1990-11-22 Jaeger Dispositif de détection de substances étrangères à travers une paroi et système d'aide à la conduite de véhicules ou d'aéronefs
FR2594557B1 (fr) * 1986-02-17 1988-06-10 Jaeger Dispositif de detection de substances etrangeres a travers une paroi et systeme d'aide a la conduite de vehicules ou d'aeronefs
US4814628A (en) * 1987-03-20 1989-03-21 Precitronic Gesellschaft Fuer Feinmechanik Und Electronic Mbh Arrangement for the transmission of laser light with reference source for backscatter obstruction detection
FR2619919B1 (fr) * 1987-09-01 1990-01-19 Jaeger Dispositif de mesure de visibilite dans un milieu turbide
FR2626076B1 (fr) * 1988-01-19 1990-12-21 France Etat Dispositif destine a la detection des variations de transparence d'une atmosphere a controler
FR2632724B1 (fr) * 1988-06-14 1990-09-14 Univ Lille Flandres Artois Procede et dispositif de mesure de la visibilite a travers un milieu d'opacite variable
GB9212060D0 (en) * 1992-06-04 1992-07-22 Appleby David Obscuration sensor
US5663710A (en) * 1995-07-18 1997-09-02 Jaycor Backscatter-type visibility detection
US6330519B1 (en) 1998-11-19 2001-12-11 Sentec Corporation Visibility sensor system
CN100357726C (zh) * 2005-02-07 2007-12-26 北京交通大学 一种大气低能见度的测量方法和装置
JP2007276704A (ja) * 2006-04-10 2007-10-25 Denso Corp 照明制御システム
FR2919726B1 (fr) * 2007-08-03 2009-11-20 Valeo Vision Procede de detection d'une gerbe d'eau a l'arriere d'un vehicule
US11255781B2 (en) * 2019-05-20 2022-02-22 Lite-On Electronics (Guangzhou) Limited Visibility meter, street light device and operation method thereof
TWI750520B (zh) * 2019-05-20 2021-12-21 大陸商光寶電子（廣州）有限公司 能見度儀、能見度量測方法和路燈裝置及其操作方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6713063A (zh) * 1967-09-25 1969-03-27
FR1598834A (zh) * 1968-12-27 1970-07-06
DE1914655B2 (de) * 1969-03-22 1972-05-18 Sick, Erwin, 8021 Icking Optisches zweistrahlmessgeraet
CH520990A (de) * 1970-12-21 1972-03-31 Cerberus Ag Rauchdetektor

Also Published As

Publication number Publication date
DE2401906B2 (de) 1978-11-16
US3901812A (en) 1975-08-26
DE2401906C3 (de) 1979-07-26
DE2401906A1 (de) 1974-09-12
FR2214897A1 (zh) 1974-08-19
FR2214897B3 (zh) 1976-11-05
SE369964B (zh) 1974-09-23
GB1459928A (en) 1976-12-31

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