Bosch announced that it has developed a sensor that allows automated vehicles to precisely determine their position: the vehicle motion and position sensor. This new sensor, which will be presented at the 2019 North American International Auto Show in Detroit from January 14-17, includes a high-performance receiver unit for global navigation satellite system (GNSS) signals, which an automated vehicle needs to determine its absolute position.
The vehicle motion and position sensor combines the GNSS position signals, the correction data, and the information from the inertial sensors, the wheel-speed sensors, and the steering-angle sensor. However, this information alone is not sufficient for the exact localization of automated vehicles. If the GNSS signal is interrupted for a longer period and it is no longer possible for the vehicle motion and position sensor to determine the vehicle’s position, the automated vehicle can refer to the Bosch road signature for localization information.
The Bosch road signature is a map-based localization service based on the surround sensors in vehicles. Bosch says it offers the service alongside its vehicle motion and position sensor-based localization solution.
Video and radar sensors onboard vehicles in motion generate the Bosch road signature by detecting stationary features on and by the road, such as lane markings, traffic signs, and guardrails. A communication module in the car sends data relating to features on and by the road to the cloud. There, the features are used to generate an independent map level, which in turn forms part of a highly accurate map.