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On October 21, 2011, TRW (Tianhe) Automotive Holdings, a leading supplier of automotive safety systems, released a message that it is developing a remote multi-axis accelerometer that can detect collisions from multiple positions simultaneously and has stronger sensing capabilities. (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.
In some frontal collisions, for example, when the front center of the vehicle collides with the column, the conventional RAS single-axis sensor mounted on the frame longitudinal beam is caused by the low rigidity of the vehicle collision area and the insufficient negative speed generated on the X-axis. No collision event detected. The front dual-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 front dual-axis RAS also has a higher sensing capability in the frontal and diagonal deflection collisions, so that the side curtain airbags can be opened in time to better protect the occupants.
Another potentially important application of a multi-axis sensing device is to sense vehicle rollover. 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 2012.
TRW TRW develops multi-axis accelerometer RAS, inductive collision and rollover