Abstract

The problem of injury protection for pedestrian is a research hot spot in traffic safety, and simulations are important research tools. In the process of design of simulation experiments, pedestrian gaits become more and more important. Hence in the research three pedestrian gait serials (walking, running and emergency) were found through observing and reconstructing 150 vehicle-pedestrian collision videos. Further studies had found that pedestrian speed and pedestrian injury are different among the three gait serials and there is significant difference between the Pedestrian Speed Before the Collision (PSBC) and the Pedestrian Speed at the Instant of the Collision (PSIC) in the same gait serial; for the emergency gait serial, there is significant difference between the estimated and reconstructed pedestrian heights; and there is high relevance between angles of the left extremities and the corresponding right extremities. Furthermore, based on results observed from the 150 videos and those existing research results, ten pedestrian gaits in each gait serial were proposed, simulation results shown that the pedestrian injury in different gait serial and in different gaits in the same gait serial are all different. The observed pedestrian gaits will help us to design a more objective simulation experiments in the future in analyzing pedestrian injury.

摘要

行人伤害防护问题是交通安全的研究热点，仿真是重要的研究工具。在模拟实验设计过程中，行人步态变得越来越重要。因此，在研究中，通过观察和重建 150 个车辆-行人碰撞视频，发现了三个行人步态序列（步行、跑步和紧急情况）。进一步研究发现，三个步态序列中的行人速度和行人伤害存在差异，同一步态序列中的碰撞前行人速度（PSBC）和碰撞瞬间行人速度（PSIC）存在显着差异; 对于紧急步态序列，估计和重建的行人高度之间存在显着差异；并且左肢的角度与对应的右肢的角度之间存在高度相关性。此外，基于从 150 个视频中观察到的结果和现有的研究结果，提出了每个步态序列中的 10 个行人步态，仿真结果表明，不同步态序列和同一步态序列中不同步态下的行人损伤都是不同的。观察到的行人步态将有助于我们在未来设计更客观的模拟实验来分析行人伤害。仿真结果表明，不同步态序列下的行人损伤和同一步态序列下不同步态下的行人损伤均不同。观察到的行人步态将有助于我们在未来设计更客观的模拟实验来分析行人伤害。仿真结果表明，不同步态序列下的行人损伤和同一步态序列下不同步态下的行人损伤均不同。观察到的行人步态将有助于我们在未来设计更客观的模拟实验来分析行人伤害。