On October 21, 2011, TRW ( TRC), the leading supplier of automotive safety systems, released a message saying that it is developing a method that can detect collisions from multiple positions at the same time. A more capable remote multi-axis accelerometer (RAS ).
The conventional crash-accelerator can measure acceleration data from only one angle, that is, the longitudinal acceleration in the frontal collision (X-axis) or the lateral acceleration in the side-impact (Y-axis). Using multi-axis accelerometers, it is possible to add multiple single-axis sensors in the same housing, or to use multi-axis sensors directly. Both can measure acceleration from multiple bearings at the same time, which can significantly improve the ability of inductive collisions. The requirements of the latest United States FMVSS214 regulations for the angled side column crash test, the forthcoming implementation and the proposed North American New Vehicle Assessment System (NCAP) and the IIHS assessment test (such as small area frontal overlap collisions and frontal column collisions) requirements Vehicles perform well in crash tests.
Martin Thoone, vice president of global electronics engineering at TRW, stated: "In some frontal collisions, for example, the front center of the vehicle collided with the column, and the assembly was in the vehicle due to the low rigidity of the vehicle collision area and the insufficient negative speed generated on the X axis. The conventional RAS single-axis sensor on the longitudinal beam can not detect the collision event, and the positive two-axis RAS with Y-axis sensing function can detect the lateral deformation of the vehicle sheet metal around the collision column and sense the collision more quickly. In addition, the positive biaxial RAS also has a higher level of sensing capability in frontal and diagonal deflection collisions, so that side curtain airbags can be opened in time to better protect the occupants.
Another potentially important application of multi-axis sensing devices is the sensing of passenger vehicle rollovers. In this case, the vertical (Z-axis) acceleration can be measured with the aid of a side collision (Y-axis) sensor, and the rollover event of the passenger vehicle can be predicted based on the measured lateral acceleration and vertical acceleration data without additional costs. Turn the gyro.
It is reported that TRW dual-axis and multi-axis induction technology will be put into use in the 2012 model year.
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