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

Patent metadata

Field	Value
Publication number	US-11378982-B2
Application number	US-201916715255-A
Country	US
Kind code	B2
Filing date	Dec 16, 2019
Priority date	Apr 30, 2015
Publication date	Jul 5, 2022
Grant date	Jul 5, 2022

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.

First claim

What is claimed is:

1. A landing system, comprising:
an unmanned aerial vehicle (UAV) configured to emit a first magnetic field;
a docking station configured to emit a second magnetic field opposing the first magnetic field, wherein the first magnetic field and the second magnetic field cooperatively generate a magnetic levitation force; and
a processor configured to:
receive a landing request from the UAV or a landing command from the docking station, wherein the landing request or the landing command comprises location information used to determine whether the UAV is in an effective range of the docking station;
control the magnetic levitation force to land the UAV onto the docking station when the UAV is within the effective range of the docking station; and
initiate a protective measure for protecting one or more magnetic sensitive devices of the UAV when the UAV is within the effective range of the docking station, the protecting measure including activating a first magnetic shield associated with the UAV or a second magnetic shield associated with the docking station to cover the one or more magnetic sensitive devices.

2. The landing system of claim 1 , wherein the processor is disposed on the UAV, the docking station, or a remote device.

3. The landing system of claim 1 , wherein the first magnetic field is generated by a first magnetic arrangement disposed on the UAV and the second magnetic field is generated by a second magnetic arrangement disposed on the docking station, the first magnetic arrangement or the second magnetic arrangement comprising one or more of a permanent magnet and/or an adjustable magnet including an electromagnet.

4. The landing system of claim 1 , wherein:
the landing request is wirelessly transmitted from the UAV;
the landing command is wirelessly transmitted from the docking station; and
the location information includes one or more of global positioning system (GPS) data and visual positioning data, wherein the GPS data representing a location of the UAV and/or the docking station, and the visual positioning data representing a location of a visual sign at the docking station.

5. The landing system of claim 1 , wherein the effective range is formed by the second magnet field providing a half sphere boundary, a circular boundary, an elliptical boundary, or a rectangular boundary from the docking station.

6. The landing system of claim 1 , wherein the processor is further configured to:
control the magnetic levitation force by adjusting one or more of a frequency, a magnitude, a direction, and a distribution of the first magnetic field or the second magnetic field.

7. The landing system of claim 6 , wherein the processor is further configured to:
decrease or increase the frequency and/or the magnitude of the first magnetic field or the second magnetic field; or
change the direction and/or the distribution of the first magnetic field or the second magnetic field.

8. The landing system of claim 7 , wherein changing the direction and/or the distribution of the first magnetic field or the second magnetic field includes changing a magnetic pole of the first magnetic field or the second magnetic field.

9. The landing system of claim 1 , wherein the protective measure further comprises: shutting down a power of the UAV or shutting down a power of propellers of the UAV.

10. The landing system of claim 1 , wherein the first magnetic shield or the second magnetic shield comprises a metallic or magnetic material and is configured to attenuate the first magnetic field or the second magnetic field.

11. The landing system of claim 1 , wherein the one or more magnetic sensitive devices comprise an image sensor including a high-definition image transferring sensor, or a position sensor including a GPS sensor or a compass.

12. A landing method comprising:
receiving a landing request from an unmanned aerial vehicle (UAV) or a landing command from a docking station, wherein the landing request or the landing command comprises location information used to determine whether the UAV is in an effective range of the docking station;
determining whether the UAV is within the effective range of the docking station based on the location information;
controlling a magnetic levitation force to land the UAV onto the docking station when the UAV is within the effective range of the docking station, wherein the magnetic levitation force is cooperatively generated by a first magnetic field that is emitted from the UAV and a second magnetic field opposing the first magnet field that is emitted from the docking station; and
initiating a protective measure for protecting one or more magnetic sensitive devices of the UAV when the UAV is within the effective range of the docking station, the protecting measure including activating a first magnetic shield associated with the UAV or a second magnetic shield associated with the docking station to cover the one or more magnetic sensitive devices.

13. The landing method of claim 12 , wherein the first magnetic field is generated by a first magnetic arrangement disposed on the UAV and the second magnetic field is generated by a second magnetic arrangement disposed on the docking station, the first magnetic arrangement or the second magnetic arrangement comprising one or more of a permanent magnet and/or an adjustable magnet including an electromagnet.

14. The landing method of claim 12 , wherein:
the landing request is wirelessly transmitted from the UAV;
the landing command is wirelessly transmitted from the docking station; and
the location information includes one or more of global positioning system (GPS) data and visual positioning data, wherein the GPS data representing a location of the UAV and/or the docking station, and the visual positioning data representing a location of a visual sign at the docking station.

15. The landing method of claim 12 , wherein the effective range is formed by the second magnet field providing a half sphere boundary, a circular boundary, an elliptical boundary, or a rectangular boundary from the docking station.

16. The landing method of claim 12 , further comprising:
controlling the magnetic levitation force by adjusting one or more of a frequency, a magnitude, a direction, and a distribution of the first magnetic field or the second magnetic field.

17. The landing method of claim 16 , further comprising:
decreasing or increasing the frequency and/or the magnitude of the first magnetic field or the second magnetic field; or
changing the direction and/or the distribution of the first magnetic field or the second magnetic field.

18. The landing method of claim 17 , wherein changing the direction and/or the distribution of the first magnetic field or the second magnetic field includes changing a magnetic pole of the first magnetic field or the second magnetic field.

19. The landing method of claim 12 , wherein the protective measure further comprises: deactivating the one or more magnetic sensitive devices, shutting down a power of the UAV, or shutting down a power of propellers of the UAV.

20. The landing method of claim 12 , wherein the first magnetic shield or the second magnetic shield comprises a metallic or magnetic material and is configured to attenuate the first magnetic field or the second magnetic field.

21. The landing system of claim 1 , wherein the protective measure further comprises: deactivating the one or more magnetic sensitive devices.

Assignees

• Sz Dji Technology Co Ltd

Inventors

• Wang Mingxi

Classifications

• B64U2201/104

  using satellite radio beacon positioning systems, e.g. GPS · CPC title

• B64U70/99

  Means for retaining the UAV on the platform, e.g. dogs or magnets · CPC title

• G05D1/102

  specially adapted for vertical take-off of aircraft · CPC title

• G05D1/0676 Primary

  specially adapted for landing · CPC title

• B64C25/001 Primary

  Devices not provided for in the groups B64C25/02 - B64C25/68 · CPC title