Electronic safing concept for car occupant restraint systems with new electrodynamic Delta-V-Safing Sensor (DVS) by direct measurement of the collision severity.

This presentation shows a new approach to an electronic safing concept based on the dual-sensor strategy by direct detection of the collision severity, i.e. the crash-pulse induced velocity change delta v. The so-called DVS Sensor (DeltaV-Safing Sensor) works on the principle of a magnetic induction system with two moving magnets in opposing directions in a measuring coil providing an analogue output voltage for the independent monitoring of frontal and rear crash scenarios. The DVS Sensor recognizes a real collision event by its characteristic output signature which is used to initialize the firing circuits of restraint systems. The full sensor design is derived from the new CVD method (Computational Virtual Design) by use of a physical sensor mode described by a set of design parameters. The dynamic sensor characteristics are predicted from computer simulation and compared with experimental results from laboratory crash tests which are discussed in respect of NoFire and MustFire conditions. For the covering abstract see ITRD E126782.