With the help of the rain system in the indoor test hall, realistic rain scenarios can be simulated. The reproducibility of the weather conditions is the focus of the setup. Due to a sprinkled area of approx. 250 m², highly dynamic sensor and driving tests can be realised in addition to static tests. The rain intensity is adjustable and can be adapted to the desired rain scenario. The 50 m length of the irrigated area allows research into the effects on the vehicle environment sensor technology even over long distances.
Real rain was measured using special measuring technology in order to obtain reference values for the design of the rain system. The results were incorporated into continuous optimisation of the system technology. The plant is operated with three powerful water pumps, which feed a large-area network of pipes and hoses. Pressure reducers are required to ensure homogeneous rain characteristics over the entire surface. The water under pressure is fanned out, so that water drops can form over a large area.