Method for determining a robot position of an autonomous mobile green area maintenance robot on an area to be maintained, method for operating an autonomous mobile green area maintenance robot on an area to be maintained, and green area maintenance system

1. A method for determining a robot position of an autonomous mobile green area maintenance robot on an area to be maintained, wherein the method comprises the steps of:

a) determining at least one robot position of the autonomous mobile green area maintenance robot by virtue of the green area maintenance robot receiving at least one global positioning signal from a global positioning system;

b) determining a station position for at least one local positioning station on the basis of the at least one determined robot position and by interchanging at least one local positioning signal between the green area maintenance robot and the at least one positioning station; and

c) determining a robot position of the green area maintenance robot on the area to be maintained on the basis of the at least one determined station position and by interchanging at least one local positioning signal between the green area maintenance robot and the at least one positioning station,

wherein the green area maintenance robot has a GNSS receiver,

wherein step a) comprises: determining the robot position by virtue of the GNSS receiver receiving global positioning signals from a GNSS, and

wherein at least one of:

the step a) is carried out if the GNSS receiver receives global positioning signals of a minimum quality from a minimum number of GNSS transmitters of the GNSS at the same time, and

the step c) is carried out if the GNSS receiver does not receive any global positioning signals of the minimum quality from the minimum number of GNSS transmitters of the GNSS at the same time.

2. The method according to claim 1 ,

wherein step c) comprises: determining the robot position by virtue of the GNSS receiver receiving global positioning signals from the GNSS when the GNSS receiver receives global positioning signals of the minimum quality from the GNSS.

3. The method according claim 1 , wherein at least one of:

the step b) comprises: determining the station position by measuring at least one distance and/or at least one direction between the green area maintenance robot and the positioning station on the basis of the at least one interchanged local positioning signal, and

the step c) comprises: determining the robot position by measuring at least one distance and/or at least one direction between the green area maintenance robot and the at least one positioning station on the basis of the at least one interchanged local positioning signal.

4. The method according to claim 1 , wherein the interchanging of the local positioning signals comprises at least one of:

transmission of the local positioning signal from the green area maintenance robot and reception of the transmitted local positioning signal by the positioning station,

transmission of the local positioning signal from the green area maintenance robot, reflection of the transmitted local positioning signal by the positioning station and reception of the reflected local positioning signal by the green area maintenance robot,

transmission of the local positioning signal from the positioning station and reception of the transmitted local positioning signal by the green area maintenance robot, and

transmission of the local positioning signal from the positioning station, reflection of the transmitted local positioning signal by the green area maintenance robot and reception of the reflected local positioning signal by the positioning station.

5. The method according to claim 1 , wherein

the local positioning signal has or is a radio signal.

6. The method according to claim 1 , wherein

the green area maintenance robot is a lawnmower robot having a lawnmower tool.

7. The method according to claim 1 , wherein

the at least one local positioning station is stationed at a boundary edge of the area and/or on the area.

8. The method according to claim 1 , wherein

the minimum number of GNSS transmitters is four.

9. The method according to claim 1 , further comprising:

controlling a movement of the green area maintenance robot on the area on the basis of the determined robot position in such a manner that the green area maintenance robot remains on the area.

10. A method for determining a robot position of an autonomous mobile green area maintenance robot on an area to be maintained, wherein the method comprises the steps of:

a) determining at least one robot position of the autonomous mobile green area maintenance robot by virtue of the green area maintenance robot receiving at least one global positioning signal from a global positioning system;

b) determining a station position for at least one local positioning station on the basis of the at least one determined robot position and by interchanging at least one local positioning signal between the green area maintenance robot and the at least one positioning station; and

c) determining a robot position of the green area maintenance robot on the area to be maintained on the basis of the at least one determined station position and by interchanging at least one local positioning signal between the green area maintenance robot and the at least one positioning station,

wherein at least one of:

the step a) comprises: determining different robot positions, and the step b) comprises: determining the station position on the basis of the different determined robot positions and by way of lateration and/or angulation on the basis of the different interchanged local positioning signals, and

the step b) comprises: determining different station positions for different positioning stations, and the step c) comprises: determining the robot position on the basis of the different determined station positions and by way of lateration and/or angulation on the basis of the different interchanged local positioning signals.

11. The method according to claim 10 , wherein

the different robot positions are three different robot positions,

the different station positions are three different station positions, and/or

the lateration is triangulation.

12. A green area maintenance system for determining a robot position of an autonomous mobile green area maintenance robot on an area to be maintained, comprising:

an autonomous mobile green area maintenance robot having a GNSS receiver; and

at least one local positioning station, and

wherein the green area maintenance system is designed to:

a) determine at least one robot position of the green area maintenance robot by virtue of the GNSS receiver receiving global positioning signals from a GNSS,

b) determine a station position for the at least one local positioning station on the basis of the at least one determined robot position and by interchanging at least one local positioning signal between the green area maintenance robot and the at least one positioning station, and

c) determine a robot position of the green area maintenance robot on the area to be maintained on the basis of the at least one determined station position and by interchanging at least one local positioning signal between the green area maintenance robot and the at least one positioning station, and

wherein at least one of:

a) is carried out if the GNSS receiver receives global positioning signals of a minimum quality from a minimum number of GNSS transmitters of the GNSS at the same time, and

c) is carried out if the GNSS receiver does not receive any global positioning signals of the minimum quality from the minimum number of GNSS transmitters of the GNSS at the same time.

13. The green area maintenance system according to claim 12 , wherein the green area maintenance system further comprises:

a control device, wherein the control device is designed to control a movement of the green area maintenance robot on the area on the basis of the determined robot position in such a manner that the green area maintenance robot remains on the area.

14. A green area maintenance system for determining a robot position of an autonomous mobile green area maintenance robot on an area to be maintained, comprising:

an autonomous mobile green area maintenance robot; and

at least one local positioning station, and

wherein the green area maintenance system is designed to:

a) determine at least one robot position of the green area maintenance robot by virtue of the green area maintenance robot receiving at least one global positioning signal from a global positioning system,

b) determine a station position for the at least one local positioning station on the basis of the at least one determined robot position and by interchanging at least one local positioning signal between the green area maintenance robot and the at least one positioning station, and

c) determine a robot position of the green area maintenance robot on the area to be maintained on the basis of the at least one determined station position and by interchanging at least one local positioning signal between the green area maintenance robot and the at least one positioning station, and

wherein at least one of:

a) comprises: determining different robot positions, and b) comprises: determining the station position on the basis of the different determined robot positions and by way of lateration and/or angulation on the basis of the different interchanged local positioning signals, and

b) comprises: determining different station positions for different positioning stations, and the step c) comprises: determining the robot position on the basis of the different determined station positions and by way of lateration and/or angulation on the basis of the different interchanged local positioning signals.

15. The green area maintenance system according to claim 14 , wherein the green area maintenance system further comprises:

a control device, wherein the control device is designed to control a movement of the green area maintenance robot on the area on the basis of the determined robot position in such a manner that the green area maintenance robot remains on the area.