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3D Road Texture Scanner

3D Road Texture Scanner

Lab on the road

At the AIT Center for Mobility Systems, we investigate the tire-road interaction in order to reduce emitted noise (tire rolling noise), increase safety (grip) and decrease tire rolling resistance (fuel consumption and CO2 emission). We have therefore developed a new high performance 3D road texture scanner, which enables precise scanning of the road surface in flowing traffic. In combination with many years of experience in acoustic measurement technology and simulation, a unique coupled modelling of the tyre/road noise levels generated by the texture is thus made possible.

CPX-Anhänger

Background

The microstructure of the road surface (< 1mm) contributes to grip and rolling resistance of tyres. Unfortunately the microstructure is not easily accessible by common measurement technologies (slow & low accuracy).

An accurate measurement of the road surface is of utmost importance for:

  • scientific research on tyre-road interaction (noise, grip, rolling resistance, …)
  • road maintenance and road condition monitoring

Our Solution

  • The AIT 3D road texture scanner applies the stereo method by using two xposure line scan cameras developed by AIT.
  • The AIT xposure camera is the world’s fastest line scan camera with a scanning rate of 600 kHz.
  • This high-speed equipment enables us to measure the road surface at a maximum speed of 130 km/h.
  • In the post processing a resolution of 0,060 mm in all three spatial directions is achieved.
  • In-situ measurements on the road are easily done and no traffic lanes need to be closed for measurements.
  • The simultaneous acquisition and coupled modelling of road surface, tyre/road noise and road texture is made possible.
  • The scanner can be mounted easily on a car or a measurement trailer.
  • No laser radiation necessary.
  • Measurement is possible under traffic combined with rolling noise or grip.
  • Highly precise input data for further modelling of tyre-road interaction is generated.
road surfaces

|_______________| approx. 1 cm

Key Features

  • high accuracy (resolution of 60 μm in X/Y/Z)
  • high measurement speed of 130 km/h
  • high raw data rate of 2.4 Gbyte/s
  • mountable on a car or measurement trailer

Possible Applications

  • “Lab on the road” for science and industry
  • Automated road condition monitoring for road authorities