JPS577544A - Road surface condition detector - Google Patents

Road surface condition detector

Info

Publication number
JPS577544A
JPS577544A JP8235180A JP8235180A JPS577544A JP S577544 A JPS577544 A JP S577544A JP 8235180 A JP8235180 A JP 8235180A JP 8235180 A JP8235180 A JP 8235180A JP S577544 A JPS577544 A JP S577544A
Authority
JP
Japan
Prior art keywords
road surface
region
brightness
lighted
optical axis
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.)
Pending
Application number
JP8235180A
Other languages
Japanese (ja)
Inventor
Minoru Tanaka
Toshihiko Nishimura
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP8235180A priority Critical patent/JPS577544A/en
Publication of JPS577544A publication Critical patent/JPS577544A/en
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/01—Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed or reference line supports; Applications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

PURPOSE:To achieve a stable and highly accurate detection of a road surface by detecting the brightness of a target made up of bright and dark parts with two cameras different in the optical axis paternized after it provided on the road surfaces is lighted. CONSTITUTION:A target provided on a road surface 11 is made up of a bright region 11a and a dark region 11b and the relative brightness of the region 11a and the region 11b vary with the conditions of the road surface in fine and rainy weathers or the like when lighted with a lighting device 12. The images of the brightness are separately taken with two cameras different in the optical axis having EE lenses 13a and 13b. They are applied to a discriminator 17 as a bit signal corresponding to a video signal and a code signal corresponding to high frequency components thereof through quantizing device 15 and a frequency discriminator 16. This enables stable and highly accurate detection of road surface conditions unaffected by disturbance such as mist in the air and dust.
JP8235180A 1980-06-17 1980-06-17 Road surface condition detector Pending JPS577544A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8235180A JPS577544A (en) 1980-06-17 1980-06-17 Road surface condition detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8235180A JPS577544A (en) 1980-06-17 1980-06-17 Road surface condition detector

Publications (1)

Publication Number Publication Date
JPS577544A true JPS577544A (en) 1982-01-14

Family

ID=13772142

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8235180A Pending JPS577544A (en) 1980-06-17 1980-06-17 Road surface condition detector

Country Status (1)

Country Link
JP (1) JPS577544A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62132449U (en) * 1986-02-14 1987-08-21
CN101845787A (en) * 2010-04-09 2010-09-29 同济大学 Cement concrete pavement joint dislocation detection device and method based on binocular vision
CN102092388A (en) * 2011-01-20 2011-06-15 浙江吉利汽车研究院有限公司 Driving safety control device related to pavement adhesion coefficient
CN109778649A (en) * 2019-01-29 2019-05-21 张亚如 Road conditions change detecting system and its application method after a kind of driving
CN110241700A (en) * 2019-05-27 2019-09-17 内蒙古路桥工程技术检测有限责任公司 Repair technology after pit slot detection

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62132449U (en) * 1986-02-14 1987-08-21
CN101845787A (en) * 2010-04-09 2010-09-29 同济大学 Cement concrete pavement joint dislocation detection device and method based on binocular vision
CN102092388A (en) * 2011-01-20 2011-06-15 浙江吉利汽车研究院有限公司 Driving safety control device related to pavement adhesion coefficient
CN109778649A (en) * 2019-01-29 2019-05-21 张亚如 Road conditions change detecting system and its application method after a kind of driving
CN110241700A (en) * 2019-05-27 2019-09-17 内蒙古路桥工程技术检测有限责任公司 Repair technology after pit slot detection

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