稳态条件下EDR车速的可信度分析

Analysis of Reliability of Vehicle Velocity Recorded by Event Data Recorder During Steady State

目的分析稳态条件(例如,无制动)下国内车辆EDR碰前车速的可信度,为EDR碰前车速的应用提供参考。方法在国外研究结论的基础上,选取国内1起既有EDR数据又有监控视频的实际案例,利用监控视频计算所得车速为参考值,分析事故车辆稳态行驶时EDR车速的可信度,并结合EDR车速的来源对其进一步分析。结果根据国外文献研究结果可知,车辆稳态行驶时EDR车速的相对误差在±4%以内。通过国内1起实例的分析,显示稳态行驶车速为120 km/h,EDR记录的碰前车速相对误差为3.886%。结论结合EDR车速来源的分析表明,稳态条件下,国内车辆EDR记录的碰前车速同样具有很好的可信度,可有效应用到相关的车速重建中。

Objective Analyzing the reliability of vehicle velocity before collision,recorded by EDR of domestic vehicle under steady state conditions,to provide a reference for the application of the vehicle velocity before collision,recorded by EDR.Method On the basis of foreign research conclusions,domestic case of both EDR data and surveillance video was selected,and the vehicle velocity calculated by video was considered as a reference value,to analyze the reliability of vehicle velocity recorded by EDR,under steady state conditions.And it is further analyzed in combination with the source of EDR speed.Results According to the research results of foreign literature,the relative error of EDR speed is less than±4%under steady state conditions.Through the domestic actual case showed that the relative error of the EDR speed was 3.886%,when vehicle run steadily at the speed of 120 km/h.Combined with the analysis results in the foreign literature review,the EDR speed error will be greater at higher speed.It can be concluded that the vehicle velocity before collision,recorded by EDR,was also very good,when driving at a speed of less than 120 km/h.Conclusion According to the analysis of the source of EDR speed,it can be shown that,the vehicle velocity before collision recorded by EDR of domestic vehicle has good reliability under steady state conditions.And EDR data can be effectively applied to the related vehicle velocity reconstruction.