Several technologies are combined for ultra-precise and reliable localization: surround sensors, satellite navigation and inertial sensors.
Bosch utilizes the surround sensors integrated in the vehicle to create an independent map layer which depicts the unique features of a road – the so-called road signature : while driving, radar and camera systems in connected vehicles record data on stationary features such as lane markings and crash barriers. These data are eventually consolidated in the Bosch IoT cloud where they are constantly updated.
To meet the high safety requirements of highly-automated driving, advanced satellite-based localization is used along with surround sensors and the road signature.
The vehicle motion and position sensor offered by Bosch plays a key role in this regard. It comprises high-performance satellite receivers, correction service for improving satellite positioning, inertial sensors, and intelligent software for reliable position calculation.
The inertial sensors come into play when insufficient environmental features and surroundings information are available or the satellite connection is malfunctioning or interrupted. Using the yaw rate (gyro) and acceleration sensors as well as the signals emitted by the wheel-speed sensors and steering-angle sensor, the system calculates the vehicle’s relative position change, thereby maintaining localization.