一种基于汽车安全气囊电脑的车辆事故取证方法
2020-10-21吴神培李岳陈文进沈顺孝
吴神培 李岳 陈文进 沈顺孝



摘 要:随着汽车产业的快速发展,我国汽车数量日益增加,根据公安部相关数据显示,截止去年底,我国机动车保有数量3.2亿余量,驾驶机动车的人数达到了3.8亿,随着而来的交通事故数也越来越多。发生事故后,对于车辆的取证需求也越来越多。目前对于事故车的取证方法还是沿用传统的取证方法,该方法存在效率低、数据误差等问题。安全气囊电脑中存储大量车辆相关的数据,对于事故取证和事故原因分析有较大价值。文中提出了一种基于汽车安全气囊电脑的取证方法,从安全气囊电脑中可以提取到EDR数据,EDR记录车辆碰撞前和碰撞后数据,为交通事故案件分析提供重要数据,提高案件的办理效率,节约案件调查的人力物力成本。
关键词:安全气囊电脑;黑匣子;EDR
Abstract: With the rapid development of the automobile industry, the number of automobiles in China is increasing day by day. According to the relevant data of the Ministry of public security, by the end of last year, the number of motor vehicles in China has reached 320 million, the number of driving motor vehicles has reached 380 million, and the number of traffic accidents is also increasing. After the accident, there is more and more demand for vehicle forensics. At present, the traditional forensics method is still used for the accident vehicle forensics, which has the problems of low efficiency and data error. A large number of vehicle related data are stored in the airbag control module, which is of great value for accident evidence collection and accident cause analysis. This paper puts forward a method of evidence collection based on automobile airbag control module, which can extract EDR data from airbag control module, EDR records the data before and after vehicle collision, provides important data for traffic accident case analysis, improves case handling efficiency, and saves human and material cost of case investigation.
Keywords: Airbag Control Module; Black Box; DER
1 汽車安全气囊电脑简介
汽车安全气囊电脑(Airbag Control Module)是气囊系统的控制中心,其作用是接收碰撞传感器及其他各传感器输入的信号,判断是否点火引爆气囊充气,并对系统故障进行自诊断[1]。气囊电脑部件主要包括:碰撞传感器、EEPROM存储芯片、爆管驱动集成电路和微处理器。
2 EDR事故数据记录器
EDR(Event Data Recorder)事故数据记录器整合于车辆气囊控制模块内部——用于提取车辆碰撞后,记录车辆碰撞前(速度与时间)和碰撞时(速度变化与时间)对应时间序列的车辆动力学数据的装置,俗称汽车“黑匣子”。EDR数据一般包括车辆碰撞前(激活前或到触发条件)5s或2.5s内的车辆速度、发动机转速、油门踏板位置、制动踏板操作情况,以及车辆碰撞后300ms内的速度和加速度的变化情况。……
