Vehicle impact severity identification device

A vehicle impact severity identification device for identifying the front-impact severity of a vehicle, the vehicle impact severity identification device comprising:

• an acceleration detector installed in the vehicle for detecting the acceleration of the vehicle and generating an acceleration signal;
• and
• an impact severity identification circuit installed in the vehicle and electrically connected to the acceleration detector for identifying the impact severity of the vehicle, the identification circuit using the acceleration signal generated by the acceleration detector and generating an impact severity identification signal at an output port of the impact severity identification circuit;
• wherein, during an impact, when the acceleration value of the acceleration signal exceeds a predetermined start value, the impact severity identification circuit will identify whether the impact is a severe impact based on a displacement generated from the acceleration signal during a predetermined period;
• wherein, if the impact is not a severe impact or can not be determined, then the impact severity identification circuit will successively identify the impact severity based upon the displacement generated by the acceleration signal, a cumulated number of times that a jerk of the acceleration signal exceeds a threshold value, and the time interval that the jerk first exceeds the threshold value, until the identification signal is generated and outputted.