GB1503990A - Method of and apparatus for recording unevenness in a road surface - Google Patents

Method of and apparatus for recording unevenness in a road surface

Info

Publication number
GB1503990A
GB1503990A GB1951275A GB1951275A GB1503990A GB 1503990 A GB1503990 A GB 1503990A GB 1951275 A GB1951275 A GB 1951275A GB 1951275 A GB1951275 A GB 1951275A GB 1503990 A GB1503990 A GB 1503990A
Authority
GB
United Kingdom
Prior art keywords
camera
road
light
rut
projected
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.)
Expired
Application number
GB1951275A
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.)
PACIFIC KOGYO KK
Original Assignee
PACIFIC KOGYO KK
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 PACIFIC KOGYO KK filed Critical PACIFIC KOGYO KK
Priority to GB1951275A priority Critical patent/GB1503990A/en
Publication of GB1503990A publication Critical patent/GB1503990A/en
Expired 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
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C7/00—Tracing profiles
    • G01C7/02—Tracing profiles of land surfaces
    • G01C7/04—Tracing profiles of land surfaces involving a vehicle which moves along the profile to be traced

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Multimedia (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Road Repair (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

1503990 Measuring road surface unevenness PACIFIC KOGYO KK 8 May 1975 19512/75 Headings G1F and G1M A travelling motor vehicle measures road roughness by means of a camera 2, Figs. 5 and 1 which records the shape b of a plane light/dark interface 19 projected on to the road by a light projector 1 and enables rut depths to be calculated from a photograph of the curved line using given equations and the measurements of Fig. 2. In the equations h is the photographing distance, F is the focal length, l 1 is the rut depth, 12 is the projected rut depth by the light, 13 is the camera width of l 2 , α equals the angle of the central light beam with the longitudinal axis of the road, and # is the camera angle. Every time the vehicle travels a predetermined distance the projector and camera are synchronously operated to effect a recording.
GB1951275A 1975-05-08 1975-05-08 Method of and apparatus for recording unevenness in a road surface Expired GB1503990A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1951275A GB1503990A (en) 1975-05-08 1975-05-08 Method of and apparatus for recording unevenness in a road surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1951275A GB1503990A (en) 1975-05-08 1975-05-08 Method of and apparatus for recording unevenness in a road surface

Publications (1)

Publication Number Publication Date
GB1503990A true GB1503990A (en) 1978-03-15

Family

ID=10130627

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1951275A Expired GB1503990A (en) 1975-05-08 1975-05-08 Method of and apparatus for recording unevenness in a road surface

Country Status (1)

Country Link
GB (1) GB1503990A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078411A2 (en) * 1981-10-29 1983-05-11 K.J. Law Engineers, Inc. Non-contact sensor with particular utility for measurement of road profile
GB2388661A (en) * 2002-05-18 2003-11-19 Aea Technology Plc Railway surveying
CN113358050A (en) * 2021-06-26 2021-09-07 南京熙赢测控技术有限公司 Calibration system and method of laser rut instrument
CN116879866A (en) * 2023-09-06 2023-10-13 四川华腾公路试验检测有限责任公司 Road surface flatness evaluation method based on laser radar three-dimensional data

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078411A2 (en) * 1981-10-29 1983-05-11 K.J. Law Engineers, Inc. Non-contact sensor with particular utility for measurement of road profile
EP0078411A3 (en) * 1981-10-29 1985-10-30 K.J. Law Engineers, Inc. Non-contact sensor with particular utility for measurement of road profile
GB2388661A (en) * 2002-05-18 2003-11-19 Aea Technology Plc Railway surveying
GB2388661B (en) * 2002-05-18 2005-05-25 Aea Technology Plc Railway surveying
CN113358050A (en) * 2021-06-26 2021-09-07 南京熙赢测控技术有限公司 Calibration system and method of laser rut instrument
CN116879866A (en) * 2023-09-06 2023-10-13 四川华腾公路试验检测有限责任公司 Road surface flatness evaluation method based on laser radar three-dimensional data
CN116879866B (en) * 2023-09-06 2023-11-14 四川华腾公路试验检测有限责任公司 Road surface flatness evaluation method based on laser radar three-dimensional data

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19950507