| Summary: | 碩士 === 國立中央大學 === 土木工程學系 === 105 === The comfort and safe driving and traffic can be influenced by pavement roughness. To prompt measure the pavement roughness without impacting traffic, lots of Departments of Transportation in Taiwan adopt the inertial profile to measure pavement roughness. The objective of this study is evaluating whether the 2D Blu-ray laser inertial profiler could be using in pavement roughness measurement or not. Firstly, the 2D Blu-ray laser inertial profiler was verified by Chinese National Standard (CNS) 15371. The 2D Bluray laser inertial profiler and the single point laser inertial profiler were used measure the roughness at various cruise speeds and the sudden brake factor. Finally, the results would be discussed. In addition, the study will also evaluate whether the inertial profile be possible to roughness measurement in bridge section or not. The results of verification found that the 2D Blu-ray laser inertial profiler totally matched the requirement of the CNS 15371
standard. Based on the results of the stability analysis on longitudinal profile elevation, the correlation coefficient of repeatability between the 2D Blu-ray
laser inertial profiler and the single point laser inertial profiler was more than 0.7. There was no significant difference in the multiple comparisons of
International Roughness Index (IRI) using two inertial profilers. In addition, based on Power Spectral Density (PSD) analysis, the total energy difference between the wavelengths of less than 30 m obtained was less than 1×10-5(m2-m/cycle), it means the measured difference was small and measurement is stable. In the bridge section, if the inertial profile should adopt laser CCD and
accelerometers, the roughness measurement would match the requirement of CNS 15371. Based on above, 2D Blu-ray laser inertial profiler could be used in roughness measurement and it is worthy of further study.
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