用于交通事故再现的轮胎/路面摩擦系数估算方法比较分析
Comparative analysis of methods to estimate the tire/road friction coefficient applied to traffic accident reconstruction
摘要：
在事故发生地点测量摩擦系数对于获得准确的输入以模拟事故非常重要，因为摩擦系数取决于环境条件和事故的动态。在一些中低收入国家，事故重建专家通常不可能获得昂贵的设备，如高精度加速度计;因此，重要的是要确定一种低成本的方法，提供与高精度设备相当的数据质量。这项研究提出了三种方法的比较：VC4000PC加速度计，传感器动力学移动应用程序和跟踪器（免费软件）的视频分析。在紧急制动时，采用防抱死制动系统（ABS），对这两种方法进行了实验比较。同时记录三种方法的数据。数据分析采用统计推断法。结果表明，使用智能手机应用程序收集的数据确保了良好的准确性，并且与加速度计相比不会产生显著差异。另一方面，通过视频分析获得的数据显示出与加速度计的良好线性关系;然而，与加速度计装置相比，它显示出与精度和方差相关的差异的一些统计证据。得到了智能手机方法的置信区间、绝对误差等估计量，促进了专家现场获取参数的最佳使用，并应用于交通事故再现。
英文摘要：
The measure of the friction factor in the location of the event is very important to get accurate inputs to model the accident, as the friction factor depends on environmental conditions and the dynamics of the event. In some low-middle income countries, accident reconstruction experts, usually don't have the feasibility to acquire expensive equipment as high precision accelerometers; therefore, it is important to identify a low-cost method that provides data quality comparable with high precision equipment. This study presents a comparison of three methods: VC4000PC accelerometer, sensor kinetics mobile app and video analysis by tracker (free software). The methods have been compared experimentally for emergency braking with blocked wheel, as well as using ABS. Data from the three methods were recorded simultaneously. Data analysis was made applying inferential statistics. The results indicate that the data collected with the smartphone app ensure good accuracy and does not provide significant variance in comparison with the accelerometer. On the other hand, the data obtained by video analysis shows a good linear relationship with the accelerometer; however, it shows some statistical evidence of differences related to precision and variances in comparison with accelerometer device. The confidence interval, absolute error, and other estimators have been obtained for the smartphone method, to promote the optimal using by the experts to get parameters on site and apply to a traffic accident reconstruction.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
