SE9904665D0 - Method for detecting deposits of ice and water - Google Patents
Method for detecting deposits of ice and waterInfo
- Publication number
- SE9904665D0 SE9904665D0 SE9904665A SE9904665A SE9904665D0 SE 9904665 D0 SE9904665 D0 SE 9904665D0 SE 9904665 A SE9904665 A SE 9904665A SE 9904665 A SE9904665 A SE 9904665A SE 9904665 D0 SE9904665 D0 SE 9904665D0
- Authority
- SE
- Sweden
- Prior art keywords
- distance
- laser
- light
- contribute
- ice
- Prior art date
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.
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 true SE9904665D0 (en) | 1999-12-20 |
SE9904665L 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) |
Families Citing this family (2)
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 |
SE543227C2 (en) * | 2019-02-28 | 2020-10-27 | Omniklima Ab | Method and arrangement for determining a condition of a road surface by superposing images of NIR camera and RGB sensor |
-
1999
- 1999-12-20 SE SE9904665A patent/SE521094C2/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SE9904665L (en) | 2001-06-21 |
SE521094C2 (en) | 2003-09-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |