JPS5777946A - Discriminating method for road surface condition - Google Patents

Discriminating method for road surface condition

Info

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
Application number
JP15422380A
Other languages
Japanese (ja)
Other versions
JPS6363852B2 (en
Inventor
Suteo Tsutsumi
Yasumasa Itakura
Keiji Fujimura
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.)
Denso Ten Ltd
Original Assignee
Denso Ten Ltd
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 Denso Ten Ltd filed Critical Denso Ten Ltd
Priority to JP15422380A priority Critical patent/JPS5777946A/en
Publication of JPS5777946A publication Critical patent/JPS5777946A/en
Publication of JPS6363852B2 publication Critical patent/JPS6363852B2/ja
Granted legal-status Critical Current

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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Vehicle Body Suspensions (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

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.
JP15422380A 1980-10-31 1980-10-31 Discriminating method for road surface condition Granted JPS5777946A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH086868A (en) * 1994-06-15 1996-01-12 Nec Corp Bus fault monitor system

Cited By (1)

* Cited by examiner, † Cited by third party
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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