一种路面平整度检测的摄像测量方法

Videogrammetry in highway roughness measurement

提出了一种应用摄像测量技术检测公路平整度的方法,并给出路面高程求解计算公式。该方法利用双标志点互差消去基准平台震动取代现有仪器中采用加速度传感器测量平台震动的方式。仿真及模拟实验结果表明,双标志点互差法能有效消除平台震动,精确测量出纵断面的相对标高。该方法对绝对高程的求解存在较大累积误差,但对国际平整度指数影响较小。此方法不仅克服了加速度传感器测量震动时的局限性和不足,还减少了传感器的使用,降低了成本,是一种适应国情适合普及使用的路面平整度测量的有效方法。

A videogrammetry scheme for road roughness measurement is proposed. The formula for road elevation calculation is given. Two marks were included in the scheme. The difference between them was used so as to remove the vibration of the reference platform, instead of measuring the platform vibration by accelerometers in the traditional instruments. Simulation and preliminary experiment indicate that the method can effectively remove the vibration of the reference platform and accurately measure the relative elevation of vertical section. Although it has accumulative errors in the absolute elevation of vertical section, it will not affect international roughness index （IRI） significantly. In conclusion, it reduces the cost by using fewer sensors and overcomes the limitations and shortages caused by the acceleration sensors used in traditional instrument. It was proved to be an effective and robust method for such applications in China.