Posted in | News | Motion Sensor

Acceleration Sensors for Automobile Applications

Bosch has unveiled its SMB431 and SMB433, two low-g acceleration sensing devices. While the SMB431 determines and controls vertical movements of the body in ±1.6 g, the SMB433 measures the vertical accelerations in the wheels in the ±16 g range.

The devices have been customized for active suspension systems to minimize fluctuations in the wheel load, enhancing the life of the vehicle.

Three or more SMB431 sensors can simultaneously measure both the vehicle acceleration along the z-axis and movements of its pitch and roll. At the same time, the SMB433 can give an accurate reading of the wheel acceleration. The solution receives signals and constantly adjusts the shock absorber to suit prevailing road conditions. The system also monitors suspension damping and reduces vehicle movement allowing for comfortable driving. The braking distance and rollover are both reduced.

The device can also monitor the tilt measurement to control trunk-lid and feature a digital signal processing with a digital two-wire PSI5 interface that offers secure signal transmission. It reduces external cabling and overall costs.
They feature filter frequencies of 30, 60, 120, and 240Hz and are encased in a SOIC14n package with a base area of 6x8.6mm.

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