Method of actuating external active safety system for vehicle

A method of actuating an external active safety system for a vehicle, used for cushioning an impact during a collision accident, wherein the external active safety system for a vehicle has at least more than one shock absorption device installed outside the vehicle, and the implementation steps comprise:

• a step of start detection, wherein a state detection device installed outside of the vehicle starts detecting synchronously when the vehicle starts;
• a step of detecting a relative distance and a step of detecting a relative speed, wherein the state detection device detects the relative distance and the relative speed between the vehicle and another physical object surrounding the vehicle, and further transmits the detected relative distance and relative speed to a central control processing unit that has an information connection with the state detection unit;
• a step of calculation and analysis, wherein the central control processing unit calculates and analyzes the relative distance and relative speed and generates monitored data;
• a step of result determination, wherein the central control processing unit determines the monitored data and generates a determination result, and when the determination result is normal, the step of detecting a relative distance and the step of detecting a relative speed, the step of calculation and analysis, and the step of result determination are repeated in a continuous manner;
• a step of outputting an actuation signal, wherein next, when the determination result is abnormal, the central control processing unit immediately transmits an actuation signal through a signal transmission unit;
• a step of starting one shock absorption device, wherein one of the shock absorption devices operates first after being actuated by the actuation signal, so that the vehicle already has a shock absorption capacity before a collision;
• and
• a step of starting another shock absorption device, wherein next, the state detection unit continues detection according to a current environmental condition, and actuate another shock absorption device according to a practical situation to effectively reduce the impact on the vehicle.