Four radar sensors, four lidar sensors and 16 cameras of various types from Bosch are integrated in Webasto’s Roof Sensor Module (RSM). The sensors detect the surroundings and are intended to enable autonomous driving at Level 4 in the future. To ensure functionality in all weather conditions, Webasto integrates functions for cleaning, de-icing and fog removal as well as sensor cooling, among others. Furthermore, the RSM houses Bosch’s high-precision vehicle motion and position sensor (VMPS), which uses Safe GNSS receivers (for navigation satellite data) and acceleration sensors (inertial sensors) to determine absolute and relative vehicle positioning.
“Autonomous driving is developing rapidly, and the roof is the optimal position for sensing the environment,” finds Freddy Geeraerds, member of the Webasto SE Executive Board. “Technical solutions already exist – our RSM reliably and safely captures the surroundings and blends stylishly into the vehicle design.”
An accurate picture of the surroundings succeeds with the combination of an optimal sensor set. Radar sensors detect distances, speeds and contours, especially in bad weather. Lidar sensors provide a very accurate three-dimensional image of the surroundings and objects, detect movements and measure speeds. By using different cameras, not only distance, surroundings and objects can be detected and classified, but also markings, signage and traffic lights can be recognized.
Depending on requirements, Webasto combines and integrates the desired type and number of sensors in the Roof Sensor Module. In this way, the company enables automotive industrialization in large quantities, offering its customers elegant solutions for automated (Level 2) to fully autonomous driving (Level 4). Openable roof systems, solar technology, ambient lighting or switchable glazing are examples of features that can be added for maximum customer benefit and comfort.
“With our prototype, we are demonstrating our expertise as a system integrator. Compared to current robotaxi prototypes on the market, we can significantly reduce height and weight in an elegant roof module while integrating a transparent sunroof that brings comfort, air and light into the vehicle for passengers,” says Geeraerds.