System and method for landing a mobile platform via a magnetic field

• US 10,509,416 B2
• Filed: 10/20/2016
• Issued: 12/17/2019
• Est. Priority Date: 04/30/2015
• Status: Active Grant

• Current Assignee: SZ DJI Technology Co., Ltd. (d/b/a DJI) (iFlight Technology Company Limited)
• Original Assignee: SZ DJI Technology Co., Ltd. (d/b/a DJI) (iFlight Technology Company Limited)
• Inventors: Wang, Mingxi
• Primary Examiner(s): Chen, Shelley
• Application Number:
  US15/299,341
• Publication Number:
  US 20170038778A1
• Time in Patent Office: 1,153 Days
• Field of Search: None
• CPC Class Codes: B64C 25/001 Devices not provided for in the groups B64C25/02 - B64C25/68
• CPC Class Codes: B64C 39/024 of the remote controlled vehicle type, i.e. RPV
• CPC Class Codes: B64F 1/02 for arresting aircraft, e.g. nets or cables
• CPC Class Codes: B64U 2201/104 using satellite radio beacon positioning systems, e.g. GPS
• CPC Class Codes: B64U 70/00 Launching, take-off or landing arrangements
• CPC Class Codes: B64U 70/99 Means for retaining the UAV on the platform, e.g. dogs or magnets
• CPC Class Codes: G01S 19/42 Determining position
• CPC Class Codes: G05D 1/0676 specially adapted for landing
• CPC Class Codes: G05D 1/102 specially adapted for vertical take-off of aircraft

Abstract

A system for landing a mobile platform, such as an Unmanned Aerial Vehicle (“UAV”) and methods for making and using the same. The system can land the UAV by applying a magnetic levitation force upon the UAV and adjusting the applied magnetic levitation force. The system can initiate a landing process to a designated docking station and can guide the UAV to an adjacency of the designated docking station. Once the UAV has entered the adjacency, the magnetic levitation forces can take control of the landing process. During the landing process, certain magnetic sensitive devices installed on the UAV and/or on the designated docking station can be protected by turning them off or by shielding them. The system overcomes disadvantages of currently-available landing systems by restricting a size and weight of the landing arrangements, as well as, avoiding potential damage to the UAV and the designated docking station.

Claims

1. A method for landing an unmanned aerial vehicle (“

UAV”

), comprising;

in response to the UAV being in a vicinity of a designated docking station, emitting a first magnetic field opposing a second magnetic field to generate a magnetic levitation force upon the UAV;

while the first magnetic field is being emitted, activating a magnetic shield to protect magnetic sensitive devices of the UAV; and

controlling the magnetic levitation force to land the UAV onto the designated docking station.

2. The method of claim 1, wherein emitting the first magnetic field comprises emitting a first electromagnetic field from the UAV.

3. The method of claim 2, wherein controlling the magnetic levitation force comprises adjusting one or more of:

a frequency, a magnitude, a direction, and a distribution, of the first electromagnetic field to land the UAV in a selected orientation and at a selected spot of the designated docking station.

4. The method of claim 2, wherein emitting the first electromagnetic field comprises running an electric current through an electrical conductor for activating a magnetic device associated with the UAV.

5. The method of claim 3, further comprising emitting the second magnetic field from the designated docking station for opposing the first magnetic field by emitting a second electromagnetic field from the designated docking station.

6. The method of claim 5, wherein controlling the magnetic levitation force comprises adjusting one or more of:

a frequency, a magnitude, a direction, and a distribution of the second electromagnetic field to land the UAV in the selected orientation and at the selected spot of the designated docking station.

7. The method of claim 5, wherein emitting the second electromagnetic field comprises running an electric current through an electrical conductor for activating a magnetic device associated with the designated docking station.

8. The method of claim 1, further comprising controlling the landing of the UAV via the first magnetic field or the second magnetic field.

9. The method of claim 1, further comprising receiving a landing request from the UAV at the designated docking station.

10. The method of claim 9, further comprising emitting a position signal from the designated docking station or presenting a visual sign at a designated docking station.

11. The method of claim 10, further comprising locating the designated docking station with a global positioning system (“

GPS”

) positioned at the UAV, guiding the UAV toward an adjacency of the designated docking station via the GPS or guiding the UAV into the adjacency via visual positioning, wherein the adjacency of the designated docking station comprises a half-sphere axially aligned with the designated docking station.

12. The method of claim 11, wherein applying the magnetic levitation force comprises emitting the first magnetic field or emitting the second magnetic field when the UAV enters the adjacency of the designated docking station.

13. The method of claim 12, further comprising:

while the second magnetic field is being emitted, activating the magnetic shield to protect the magnetic sensitive devices of the UAV.

14. The method of claim 12, further comprising deactivating the first magnetic field when the UAV is landed at a predetermined location or deactivating the second magnetic field when the UAV is landed at the predetermined location.

15. A method for landing an unmanned aerial vehicle (“

UAV”

), comprising;

receiving a landing request from the UAV at a designated docking station;

emitting a first electromagnetic field from the UAV;

while the first electromagnetic field is being emitted, activating a first magnetic shield to protect magnetic sensitive devices of the UAV;

emitting a second electromagnetic field from the designated docking station for opposing the first electromagnetic field to generate a magnetic levitation force upon the UAV;

while the second electromagnetic field is being emitted, activating a second magnetic shield to protect magnetic sensitive devices of the designated docking station; and

adjusting one or more of;

a frequency, a magnitude, a direction, and a distribution of the first electromagnetic field or the second electromagnetic field to land the UAV in a selected orientation and at a selected spot of the designated docking station.

16. A system, comprising:

an unmanned aerial vehicle (“

UAV”

) configured to emit a first electromagnetic field, the UAV having a magnetic shield configured to be activated;

a docking station configured to emit a second electromagnetic field for opposing the first electromagnetic field to generate a magnetic levitation force upon the UAV; and

one or more processors, individually or collectively, configured to operate to;

activate the magnetic shield to protect magnetic sensitive devices of the UAV while the first electromagnetic field is being emitted;

adjust one or more of;

a frequency, a magnitude, a direction, and a distribution of the first electromagnetic field or the second electromagnetic field to land the UAV in a selected orientation and at a selected spot of the docking station.

17. A docking station for landing an unmanned aerial vehicle (“

UAV”

), comprising;

a magnetic device associated with the docking station for emitting a second magnetic field opposing a first magnetic field to generate a controllable magnetic levitation force upon the UAV;

a magnetic shield configured to be activated; and

a processor configured to;

activate the magnetic shield to protect magnetic sensitive devices of the docking station; and

control the magnetic levitation force to land the UAV.

18. The docking station of claim 17, wherein the second magnetic field is a second electromagnetic field emitted from the docking station by running an electric current through an electrical conductor of the magnetic device.

19. The docking station of claim 18, wherein the second electromagnetic field is controlled by the magnetic device via adjusting one or more of:

a frequency, a magnitude, a direction, and a distribution of the second electromagnetic field to land the UAV in a selected orientation and at a selected spot of the docking station.

20. The docking station of claim 18, wherein the processor is configured to control the magnetic device to land the UAV via the second electromagnetic field.

21. The docking station of claim 17, wherein the processor is configured to emit the second magnetic field when the UAV enters an adjacency of the docking station.

22. The docking station of claim 17, wherein the processor is configured to deactivate the second magnetic field when the UAV is landed at the selected spot of the docking station.

23. The docking station of claim 17, wherein the processor is configured to emit a position signal from the docking station for positioning by the UAV or to present a visual sign from the docking station for visual positioning by the UAV.

24. The docking station claim 17, wherein the magnetic sensitive devices include one or more of:

a high-definition image transferring device, a compass, and an electrical circuit.