A bar with optical sensors scans the area in front of the mowers during the mowing process.
An LED integrated into each sensor emits light in the near-infrared spectral range. The light, which is not visible to humans, is reflected by the vegetation back to the sensor. However, the brown fur of fawns and other animals reflects light with a different intensity than plants. The sensors detect this and send an electrical signal to the control unit in the tractor cab.