Abstract: When the vehicle pulls over, the passengers in the vehicle can't accurately judge the road condition behind because of the blind area of vision and other factors. After blindly opening the door, they collide with the dangerous objects coming from behind, causing serious personal injury and property loss. In this paper, a car door opening and collision avoidance system based on millimeter wave radar is designed. After the door is opened, the object in the rear is detected in real time. The extreme learning machine model is used to judge the danger level, and the brake device of the limiter is used to limit the continuous opening of the door before the danger occurs, so as to avoid the occurrence of serious consequences. The innovation of this paper is to adopt the idea of process protection instead of locking the door, which has continuous protection function in the process of opening the door. The door can be opened at a small angle, which is convenient for people outside the car to understand the intention of passengers inside the car.

Key words: Open door collision avoidance; Millimeter wave radar; Extreme learning machine; Limiter brake; Process protection

摘要： 车辆靠边停车时，车内乘客由于视野盲区等因素无法准确判断后方的路况，盲目开门 后与后方驶来的危险物体发生碰撞，造成严重的人身伤害和财产损失。因此，文章开发了一 种基于毫米波雷达的汽车开门防撞系统，在打开车门后实时探测车后的运动目标，采用极限 学习机模型判断危险等级，通过限位器制动装置在危险发生之前及时限制车门的继续开启， 从而避免出现严重的后果。文章创新点在于采用过程防护而不是锁闭车门的思想，在开门过 程中具有连续保护功能，使得车门可以开启很小角度，便于车外人员理解车内人员的下车意 图。

关键词: 开门防撞；毫米波雷达；极限学习机；限位器制动；过程防护