| 主权项 |
1. An obstacle information system for a helicopter with a warning information processor and a display unit of any obstacle within a predetermined minimum distance d4 with regard to the helicopter, the warning information processor being fed with information related to detected distance d5 and direction of the at least one obstacle with regard to the helicopter detected by an obstacle sensor system to compute and prepare the information for presentation on the display unit, the display unit comprising at least an indication area with two sub-areas, a central circular surface and a concentric ring-shaped area around the circular surface, the circular surface being used exclusively for alerts, the ring-shaped area being used for both warnings as well as alerts and the repartition in the indication area of the circular surface and ring-shaped area being dependent on the detected distance d5 of the at least one obstacle with regard to the helicopter, characterized in that coloring is provided at least at a section of the ring-shaped area with an inner radius rw, rw being the result of a projection gw of the at least one obstacle from a section d3 of a distance scale onto a section d3* of an indication scale, the projection providing a smaller inner radius rw of the colored ring-shaped surface the closer the obstacle is to an alerting distance d1+d2, with d1 being the radius of a concentric inner ring shaped alert zone za, d1+d2 being an inner warning radius and d1+d2+d3=d4 being an outer warning radius of an outer ring shaped warning zone zw. |
