A-Pillar Satellite Sensors: Notes

One acceleration sensor for the longitudinal acceleration and one for the transversal acceleration are integrated in the A-pillar satellites.

The sensors provide a variable voltage. This voltage is a measurement of the vehicle acceleration. This voltage signal is filtered, amplified, converted and transmitted as a data telegram.

The strategic arrangement of acceleration sensors in the vehicle and the sensor data recognized in satellites, enable recognition of the direction and crash severity.

For the ISIS system, a detected crash severity and direction of the impact are distinguished according to frontal, side, or rear-end collision.

With the involvement of the seat occupation detection, the seatbelt buckle input and using a stored trigger algorithm, accident-relevant triggering of the pyrotechnic actuators (e.g. seatbelt tensioner, airbags) is intended to achieve the greatest possible degree of occupant protection.