SE9904665L - Method for detecting deposits of ice and water - Google Patents

Method for detecting deposits of ice and water

Info

Publication number
SE9904665L
SE9904665L SE9904665A SE9904665A SE9904665L SE 9904665 L SE9904665 L SE 9904665L SE 9904665 A SE9904665 A SE 9904665A SE 9904665 A SE9904665 A SE 9904665A SE 9904665 L SE9904665 L SE 9904665L
Authority
SE
Sweden
Prior art keywords
distance
laser
light
contribute
ice
Prior art date
Application number
SE9904665A
Other languages
Swedish (sv)
Other versions
SE521094C2 (en
SE9904665D0 (en
Inventor
Sten Loefving
Original Assignee
Sten Loefving Med Optical Sens
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 Sten Loefving Med Optical Sens filed Critical Sten Loefving Med Optical Sens
Priority to SE9904665A priority Critical patent/SE521094C2/en
Publication of SE9904665D0 publication Critical patent/SE9904665D0/en
Publication of SE9904665L publication Critical patent/SE9904665L/en
Publication of SE521094C2 publication Critical patent/SE521094C2/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
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/4738—Diffuse reflection, e.g. also for testing fluids, fibrous materials

Landscapes

  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The angle of incidence relative to the surface of the objected being measured is specially chosen so that any diffuse light from the film does not contribute to the detection signal, whilst diffuse light from surface areas where no film is present does contribute to the detection signal. The dependence of the output signal on distance is compensated for in the receiver optics, so that the output signal within a distance interval becomes essentially independent of distance. Modulated light from a laser is shone onto a surface and the reflected laser light is measured using a detector mounted close to the laser.
SE9904665A 1999-12-20 1999-12-20 Detecting film of water or ice detection using laser reflectance, using angle of incidence chosen so that only diffuse light from water free surface areas contributed to signal SE521094C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9904665A SE521094C2 (en) 1999-12-20 1999-12-20 Detecting film of water or ice detection using laser reflectance, using angle of incidence chosen so that only diffuse light from water free surface areas contributed to signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9904665A SE521094C2 (en) 1999-12-20 1999-12-20 Detecting film of water or ice detection using laser reflectance, using angle of incidence chosen so that only diffuse light from water free surface areas contributed to signal

Publications (3)

Publication Number Publication Date
SE9904665D0 SE9904665D0 (en) 1999-12-20
SE9904665L true SE9904665L (en) 2001-06-21
SE521094C2 SE521094C2 (en) 2003-09-30

Family

ID=20418201

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9904665A SE521094C2 (en) 1999-12-20 1999-12-20 Detecting film of water or ice detection using laser reflectance, using angle of incidence chosen so that only diffuse light from water free surface areas contributed to signal

Country Status (1)

Country Link
SE (1) SE521094C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3931810A4 (en) * 2019-02-28 2022-12-07 Klimator AB Method and arrangement for determining a condition of a road surface by superposing images of nir camera and rgb sensor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3299993A1 (en) 2016-09-22 2018-03-28 OmniKlima AB Method and arrangement for determining a condition of a road surface

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3931810A4 (en) * 2019-02-28 2022-12-07 Klimator AB Method and arrangement for determining a condition of a road surface by superposing images of nir camera and rgb sensor

Also Published As

Publication number Publication date
SE521094C2 (en) 2003-09-30
SE9904665D0 (en) 1999-12-20

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Legal Events

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