The BMW SBE2 Child Seat Detection System

* Final gross prices may vary according to local VAT.

Get Access

Abstract

Besides a measure of crash-severity the smart airbag system of the future needs information about the actual seat-occupation. For the driver seat, two parameters are to be evaluated:

  • Approximate weight of driver (occupant classification)

  • Drivers distance to airbag (out of position sensor)

  • For the passenger seat, two additional aspects are relevant:

  • Is the seat occupied at all? (seat occupation detection)

  • Is it occupied by a child seat? (child seat detection)

  • Child seat detection is especially important in two-seat vehicles like the Z3 roadster. This challenge is adressed by the upcoming BMW SBE2 system. Unlike some competitors strategies to install manual airbag deactivation switches or to develop a system that recognises only certain child seats equipped with electronic resonators, the BMW SBE2 system generally discriminates between adults and child restraints.

    The sensor-principle is based on the measurement of two distinct physical properties, pressure profile and capacity. The employment of digital signal processing and pattern recognition algorithms enables a redundant, selfsupervising and fully-automatic detection system.