In real world, Collisions which are faster than NCAP speed are occurring and fatality rate is high in such collisions. In order to solve such the high-speed collisions, it is important to increase the energy absorption amount of the occupant restraint devise. In order to increase the amount of energy absorption, it is necessary to detect the collision early and for the occupant to be restrained at an early timing

We focused on the integrated system using the advanced driver assistance systems (ADAS) sensor as a method to achieve the early airbag deployment timing. And we research whether the collision detection timing can become earlier and the occupant injury can be reduced.

A collision is predicted using the ADAS sensor, and the threshold of an airbag deployment is lowered just before the collision. Furthermore, by lowering the threshold only at the collision speed where an airbag deployment is required, it will prevent an airbag deployment at slight collisions. Also, the threshold is lowered until the rough road toughness can be secured. So the toughness of rough road traveling is equivalent to the conventional one.

For confirming the effect of this sensing system, we conducted simulation using LS-DYNA and the actual vehicle test. The airbag deployment timing was calculated by the simulation results.

In order to calculate the effect on the occupant injury, sled test was also conducted. The input data of floor G and the airbag deployment timing is the results of simulation.

From these results, it was found that the collision would be detected earlier than the conventional one. And we also confirmed the effect of reducing occupant injury.