| 摘要 |
APPARATUS FOR MEASURING CARRIAGEWAY SURFACE PROPERTIES An apparatus for measuring surface properties of a carriageway or road comprises a platform (2) arranged to move over the carriageway, the platform (2) 5 carrying a light source (4) arranged to illuminate the carriageway, and a detector (6) arranged to receive light returning from the carriageway. The light source (4) projects a line (22) of light onto the surface (10) and data representing light returning from the line of light is captured and stored. * 6 32, 36, |
