TRUCK TAKES THE SURVEYING STRAIN

A simple system for accurately surveying road surfaces from a moving vehicle is patented by Pacific Kogyo Kabushiki Kaisha of Tokyo on BP 1 503 990. The aim is to locate ruts or bumps in the surface - normally this is done by closing the road to traffic with surveyors making direct measurements. In the Japanese method, a survey truck carries an optical projector which beams an image of a light-dark interface, for instance a light strip on a dark background, onto the road surface ahead of the truck. The image will appear as a straight line only if the road surface is flat; if there are bumps then the image will appear curved, the exact amount of deformation being proportional to the unevenness of the road surface. A constant stream of images can be recorded using a camera mounted in front of the projector taking photos at regular distances while the truck moves at up to 50 km/h. /Author/TRRL/

  • Availability:
  • Corporate Authors:

    IPC Magazine Limited

    King's Reach Tower, Stamford Street
    London SE1 9LS,   England 
  • Publication Date: 1978-5-4

Media Info

  • Pagination: p. 296
  • Serial:
    • NEW SCIENTIST
    • Volume: 78
    • Issue Number: 1101
    • Publisher: REED BUSINESS INFORMATION LTD
    • ISSN: 0262-4079

Subject/Index Terms

Filing Info

  • Accession Number: 00184311
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Dec 29 1978 12:00AM