为解决隧道发生突发性应急事件时，后续车辆存在继续驶入容易造成二次灾害的普遍问题，提出一种基于丁达尔效应的车辆安全无障碍阻拦技术。通过分析丁达尔效应产生的机制，研究在路段形成稳定丁达尔效应车辆无障碍阻拦效果的烟雾发生器和激光的控制参数。研究结果表明： 1）烟雾系统喷嘴所需压力随阻力风速的增加而增加，并且喷嘴偏转角越大，所需喷射压力越大； 2）根据人眼暂留效应，形成丁达尔效应的激光扫描速度与扫描角度的正切值之间满足正比关系； 3）烟雾越轻薄，丁达尔效应越明显，所呈现的光幕阻拦信息越明显，辨识距离越远。结合倾向性调研说明，提出的基于丁达尔效应的光烟雾车辆阻拦技术具有阻拦信息明显、易辨识、易被民众接受的优点。
To avoid secondary disaster caused by subsequent
vehicles when a sudden emergency occurs in tunnel, a vehicle safety barrierfree
blocking technology based on the Tyndall effect is proposed. By analyzing the
mechanism of the Tyndall effect, the control parameters of the smoke generator
and laser that form a stable barrier free effect for vehicles with the Tyndall
effect on road sections are studied. The results show the following: (1) The
pressure required for the nozzle of the smoke system increases with increasing
resistance wind speed, and the larger the nozzle deflection angle, the larger
is the required injection pressure. (2) According to the human eye persistence
effect, there is a proportional relationship between the laser scanning speed
that forms the Tyndall effect and the tangent value of the scanning angle. (3)
The thinner the smoke, the more obvious the Tyndall effect and the light screen
blocking information presented, and the farther is the recognition distance.
Based on the tendentious research, it is shown that the light smoke vehicle
blocking technology proposed based on the Tyndall effect has the advantages of
obvious and easy identification of blocking information and acceptance by the
public.
