TESTING A METHOD OF CLASSIFYING ROAD ROUGHNESS BASED ON SURFACE DYNAMICS (SD) PROFILOMETER MEASUREMENTS

PROV MED EN METOD FOER KLASSIFICERING AV VAEGARS JAEMNHET, BASERAD PAA MAETNING MED SD-PROFILOMETER

The profilometer is a passenger vehicle instrumented to measure roughness by means of a springloaded wheel mounted under the chassis. Vertical movements of this are measured by a potentiometer, output of which represents the road profile in relation to the vehicle. The vertical acceleration of the chassis is simultaneously measured by an accelerometer, and the signal is integrated twice. The actual road profile is produced by adding these two signals. The roughness classification method is based on an ISO proposal. It is based on frequency analysis of the road profile signal obtained by the potentiometer. It should be possible to classify pavement roughness by drawing parallel lines in a psd diagram which would divide sets of evenness classes. ISO proposes five classes. Tests carried out with the profilometer and subjected to frequency analysis yield results in fairly good agreement with ISO proposal. It appears that it can be used on Swedish roads. However, analysis is laborious, and certain imperfections in the profilometer must be eliminated. (TRRL)

  • Availability:
  • Corporate Authors:

    KTH Royal Institute of Technology, Sweden

    Stockholm,   Sweden  SE-100 44
  • Authors:
    • Henriksson, G
    • Wetterblad, S
  • Publication Date: 1982

Language

  • Swedish

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 29 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00381218
  • Record Type: Publication
  • Source Agency: Swedish National Road and Transport Research Institute (VTI)
  • Report/Paper Numbers: 1982:5 Monograph
  • Files: ITRD, TRIS
  • Created Date: Apr 30 1984 12:00AM