碰撞传感器多数采用惯性式机械开关结构，相当一只控制开关，其工作状态取决于汽车碰撞时加速度的大小。按结构可分为机械式和电子式两种。机械式有滚球式、滚轴式、偏心球式。(Most of the collision sensors use inertial mechanical switch structure, which is quite a control switch. Its working state depends on the acceleration of vehicle collision. According to the structure, it can be divided into two types: mechanical and electronic. The machine has rollers, rollers and eccentric balls.)