JPS5614140A - Detecting method for road-surface condition - Google Patents

Detecting method for road-surface condition

Info

Publication number
JPS5614140A
JPS5614140A JP9081879A JP9081879A JPS5614140A JP S5614140 A JPS5614140 A JP S5614140A JP 9081879 A JP9081879 A JP 9081879A JP 9081879 A JP9081879 A JP 9081879A JP S5614140 A JPS5614140 A JP S5614140A
Authority
JP
Japan
Prior art keywords
road
state
snow
reflection
surface state
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
JP9081879A
Other languages
Japanese (ja)
Other versions
JPS601573B2 (en
Inventor
Takateru Kotake
Hiroshi Fukamizu
Masashi Nakano
Seiya Matsuoka
Iichi Hirao
Kunio Iba
Taro Yamazaki
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.)
LEO GIKEN KK
REO GIKEN KK
Omron Corp
Original Assignee
LEO GIKEN KK
REO GIKEN KK
Omron Tateisi Electronics Co
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 LEO GIKEN KK, REO GIKEN KK, Omron Tateisi Electronics Co filed Critical LEO GIKEN KK
Priority to JP9081879A priority Critical patent/JPS601573B2/en
Priority to DE19803023444 priority patent/DE3023444C2/en
Priority to CH485980A priority patent/CH653134A5/en
Publication of JPS5614140A publication Critical patent/JPS5614140A/en
Publication of JPS601573B2 publication Critical patent/JPS601573B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01W—METEOROLOGY
    • G01W1/00—Meteorology
    • G01W1/14—Rainfall or precipitation gauges
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B19/00—Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow
    • G08B19/02—Alarm responsive to formation or anticipated formation of ice
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F27/00—Combined visual and audible advertising or displaying, e.g. for public address
    • G09F27/005—Signs associated with a sensor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F7/00—Signs, name or number plates, letters, numerals, or symbols; Panels or boards
    • G09F2007/005—Signs associated with a sensor

Landscapes

  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Theoretical Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Atmospheric Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental Sciences (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Traffic Control Systems (AREA)

Abstract

PURPOSE:To obtain a detecting method that can easily be equipped and detect a road-surface state, especially a snow state with accuracy, by deciding the state of the road surface on the basis of difference in direct reflection factor and diffused reflection factor of infrared rays on the road surface according to the road-surface state and a road-surface temperature. CONSTITUTION:Of light projected from projector 1 and reflected on road surface 4, light of direct reflection and that of diffused reflection are photodetected by photodetectors 11 and 12 for direct reflection and diffused reflection respectively and then converted into electric signals. By making use of characteristics that the reflection factor of the surface of snow decreases according to a shift from the visual light range to the infrared-ray range, filters 14 and 24 supply comparators 15, 16 and 25 with output signals containing information regarding the state of the road surface. On the basis of the decision result of the road-surface state from comparators and a temperature detection signal from radiation thermometer 31, microprocessor 40 makes the final decision to classify the road-surface state by four kinds of dry, wet, frozen and snow states. Thus, the road-surface state, especially the snow state can be detected with accuracy.
JP9081879A 1979-06-29 1979-07-16 Road surface condition detection method Expired JPS601573B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP9081879A JPS601573B2 (en) 1979-07-16 1979-07-16 Road surface condition detection method
DE19803023444 DE3023444C2 (en) 1979-06-29 1980-06-23 Device for determining the weather-related road conditions
CH485980A CH653134A5 (en) 1979-06-29 1980-06-25 Device for determining the state of roads

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9081879A JPS601573B2 (en) 1979-07-16 1979-07-16 Road surface condition detection method

Publications (2)

Publication Number Publication Date
JPS5614140A true JPS5614140A (en) 1981-02-10
JPS601573B2 JPS601573B2 (en) 1985-01-16

Family

ID=14009169

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9081879A Expired JPS601573B2 (en) 1979-06-29 1979-07-16 Road surface condition detection method

Country Status (1)

Country Link
JP (1) JPS601573B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59197547A (en) * 1983-04-20 1984-11-09 Japan Steel Works Ltd:The Pitting corrosion resistant ni-containing martensite type stainless steel
JPH01134231A (en) * 1987-10-17 1989-05-26 Hoechst Ag Surface moisture measuring apparatus
US9451745B1 (en) * 2012-09-21 2016-09-27 The United States Of America, As Represented By The Secretary Of Agriculture Multi-band photodiode sensor
JP2020106443A (en) * 2018-12-28 2020-07-09 スタンレー電気株式会社 Road surface state detection system and road surface state detection method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59197547A (en) * 1983-04-20 1984-11-09 Japan Steel Works Ltd:The Pitting corrosion resistant ni-containing martensite type stainless steel
JPH01134231A (en) * 1987-10-17 1989-05-26 Hoechst Ag Surface moisture measuring apparatus
US9451745B1 (en) * 2012-09-21 2016-09-27 The United States Of America, As Represented By The Secretary Of Agriculture Multi-band photodiode sensor
JP2020106443A (en) * 2018-12-28 2020-07-09 スタンレー電気株式会社 Road surface state detection system and road surface state detection method

Also Published As

Publication number Publication date
JPS601573B2 (en) 1985-01-16

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