This topic is carries on the optimized design to the existing offset press Automatic Register Control System, enhances to the low color difference signal recognition and the judgment, thus enhances the system the sensitivity and the precision.

According to the structure and principle of roughness measuring instrument, the measurementcourse of the roughness is simulated using MATLAB,the quantitative relation between roughness index and pavement state parameters are analyzed, and the actual meaning and feasibility to establish new controlling methods of auto-leveling system for paver and improving the pavement roughness are expounded.