JPS5777946A - Discriminating method for road surface condition - Google Patents
Discriminating method for road surface conditionInfo
- Publication number
- JPS5777946A JPS5777946A JP15422380A JP15422380A JPS5777946A JP S5777946 A JPS5777946 A JP S5777946A JP 15422380 A JP15422380 A JP 15422380A JP 15422380 A JP15422380 A JP 15422380A JP S5777946 A JPS5777946 A JP S5777946A
- Authority
- JP
- Japan
- Prior art keywords
- road surface
- transducing element
- photoelectric transducing
- condition
- reflection luminance
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
- G01B11/303—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces using photoelectric detection means
Abstract
PURPOSE:To enable to perform a rapid and quantitative discrimination of a road surface condition in a manner of non-contact with the road surface, by a method wherein the road surface is scanned using a photoelectric transducing element to compute a self-correlative function of a reflection luminance or a radiation luminance. CONSTITUTION:A reflection luminance of a part 5 of a road surface 1 is detected via a light collecting lens 2 by a photoelectric transducing element 3. The light collecting lens 2 and the photoelectric transducing element 3, loaded on, for example, a car, are caused to scan on the road surface 1 through the running of the car in the direction of an arrow mark 4. The reflection luminance of the road surface 1 along the scanning direction 4 is converted into an electric signal, and the output is amplified to input it to an operation circuit 8 via an analogue digital converter 7. This computes a self-correlative function phi(r) at the operation circuit 8. In this case, the phi(r) contains a factor alpha varying with the road condition, and thereby finding of the alpha value permits the quantitative discrimination of the road surface condition.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15422380A JPS5777946A (en) | 1980-10-31 | 1980-10-31 | Discriminating method for road surface condition |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15422380A JPS5777946A (en) | 1980-10-31 | 1980-10-31 | Discriminating method for road surface condition |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5777946A true JPS5777946A (en) | 1982-05-15 |
JPS6363852B2 JPS6363852B2 (en) | 1988-12-08 |
Family
ID=15579534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15422380A Granted JPS5777946A (en) | 1980-10-31 | 1980-10-31 | Discriminating method for road surface condition |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5777946A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4651290A (en) * | 1983-06-16 | 1987-03-17 | Nippondenso Co., Ltd. | Road condition discriminating system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH086868A (en) * | 1994-06-15 | 1996-01-12 | Nec Corp | Bus fault monitor system |
-
1980
- 1980-10-31 JP JP15422380A patent/JPS5777946A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4651290A (en) * | 1983-06-16 | 1987-03-17 | Nippondenso Co., Ltd. | Road condition discriminating system |
Also Published As
Publication number | Publication date |
---|---|
JPS6363852B2 (en) | 1988-12-08 |
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