一种汽车-二轮车碰撞车速计算新方法的研究

基于我国36例具有事故现场监控视频的汽车-二轮车碰撞案例，首先依据GA／T1133—2014《基于视频图像的车辆行驶速度技术鉴定》，计算得到车辆碰撞二轮车的碰撞时刻车速；再结合事故现场图、事故现场照片，得到二轮车倒地滑行的准确距离，运用EXCEL得到碰撞车辆的车速与二轮车滑行距离关系的散点图，并尝试采用非线性回归方法进行曲线拟合，得到基于二轮车倒地滑行距离的车辆碰撞速度计算经验图表。其次，分析每一案例的特殊性，探讨这一经验图表的适用范围，剔除杂点，再次采用非线性回归方法拟合曲线，得到适用于单车碰撞二轮车的碰撞车速经验图表计算法，为这类事故的车速鉴定提供了一种方便、准确的新方法。

Based on 36 accident cases and their video recordings in China, the velocity of vehicles are calculated according to the GA/T 1133-2014. Sliding distance of bicycle is obtained from accident scene drawings and scene pictures. Developing a scatter plot with EXCEL and using nonlinear regress analysis, the diagram of relationship between sliding distance and the velocity of vehicle can be obtained. Furtherly, analyze the particularity of each case to check the applicability of the diagram to other cases. After eliminating the noise point and making nonlinear regression analysis again, the diagram of relationship between sliding distance and the velocity of vehicle is eventually developed, which can be used to conveniently and correctly calculate the velocity in these accidents.