一起火灾事故调查中视频分析与现场实验

Video analysis and field experiment in a fire accident investigation

在一起典型的电气火灾事故调查过程中,调查人员采用“火察”软件分析视频中的关键信息,依据弧光特征确定了电气火灾的调查方向,运用火灾视频量化数据法计算火灾视频中电弧光线的投影角度,利用光线投影的反向延长线划定了发生电弧的范围。通过现场不同位置光影轮廓线实验,缩小了调查范围,结合痕迹物证、证人证言等内容验证火灾视频分析的结论,准确判断出该起火灾的起火时间、原因及起火点。最后对该火灾的视频分析方法、现场实验应用、调查取证措施归纳总结。

In a typical electrical fire accident investigation process, the investigators used the "Fire Inspection" video analysis software to analyze the key information in the video, determined the investigation direction of the electrical fire based on the arc characteristics, and used the fire video quantitative data method to calculate the fire video. The projection angle of the arc light, using the reverse extension line of the light projection to delimit the arc generation range. Through the experiment of light and shadow contour lines at different locations on the scene, the scope of investigation was narrowed as much as possible, and the conclusions of fire video analysis were verified by combining trace material evidence and witness testimony, so as to accurately determine the time, cause and location of the fire. Finally, the fire video analysis method, field experiment application, investigation and evidence collection measures are summarized and summarized.