Granted Patent B2

US 12,234,023 · App. 18/535,579 · Granted Feb 25, 2025

Inventors: Renli Shi (Shenzhen, CN); Xuyang Pan (Shenzhen, CN); Jianyu Song (Shenzhen, CN); Canlong Lin (Shenzhen, CN)

Assignee: SZ DJI TECHNOLOGY CO., LTD.

B64D31/00B64U50/19B64D45/04B64U70/40B64U2201/20G05D1/0676

Abstract

Claims (89)

1. A method for automatically powering off a movable object comprising:

in response to an operating state of the movable object being a landed state and a triggering condition being satisfied:

controlling to shut down a propulsion output of the movable object such that the movable object completes automatic power off after landing, the triggering condition including determining that the propulsion output is currently enabled and an automatic take-off operation is not currently performed.

2. The method of claim 1 , further comprising:

obtaining operational information of the movable object and determining whether the operational information satisfies a landed criterion, the operational information including at least one of relative altitude information, absolute altitude information, or movement information; and

determining the movable object is in the landed state in response to the operational information satisfying the landed criterion.

3. The method of claim 1 , further comprising:

obtaining relative altitude information of the movable object, the relative altitude information including a landing distance to a landing plane; and

determining the movable object is in the landed state in response to the relative altitude information satisfying a preset landed criterion, the relative altitude information satisfying the preset landed criterion including that:

a number of times that the landing distance measured within a preset time period is smaller than a distance threshold reaches a threshold number of times.

4. The method of claim 1 , further comprising:

obtaining absolute altitude information of the movable object during a current flight process;

performing calculation on the absolute altitude information to obtain an absolute altitude variance; and

determining that a preset landed criterion is satisfied and the movable object is in the landed state in response to the variance being smaller than a variance threshold set forth in the preset landed criterion and the current flight process is a descending process.

5. The method of claim 1 , further comprising:

determining an operating state of a distance measuring sensor of the movable object;

in response to the operating state of the distance measuring sensor being a normal state:

triggering the distance measuring sensor to measure a landing distance from the movable object to a landing plane; and

determining that a first preset landed criterion is satisfied and the movable object is in the landed state in response to a number of times the landing distance is measured to be smaller than a distance threshold reaching a threshold number within a preset time period; and

in response to the operating state of the distance measuring sensor being an abnormal state:

obtaining absolute altitude information of the movable object during current flight process;

performing calculation on the absolute altitude information to obtain an absolute altitude variance; and

determining that a second preset landed criterion is satisfied and the movable object is in the landed state in response to the variance being smaller than a variance threshold and the current flight process is a descending process.

6. The method of claim 1 , further comprising:

obtaining movement information of the movable object via an inertial measurement unit;

determining whether the movable object has landed according to the movement information; and

determining the movable object is in the landed state in response to determining that the movable object has landed.

7. The method of claim 1 ,

wherein the operating state of the movable object is detected at least twice;

the method further comprising:

detecting a position of a throttle joystick of a remote controller of the movable object in response to a number of times that the movable object is detected as being in the landed state being greater than a preset threshold; and

controlling to shut down the propulsion output of the movable object in response to the throttle joystick of the remote controller being at a lowest position where the movable object is required to land.

8. The method of claim 1 , wherein controlling to shut down the propulsion output of the movable object includes:

sending a power off instruction to a propulsion component of the movable object, such that the propulsion component shuts down the propulsion output in response to the power off instruction.

9. The method of claim 1 , wherein controlling to shut down the propulsion output of the movable object includes:

sending a turning off instruction to a power supply of the movable object, such that the power supply shuts down powering to a propulsion component of the movable object to effect a power off operation of the propulsion output in response to the turning off instruction.

10. The method of claim 1 , further comprising:

obtaining relative altitude information of the movable object, the relative altitude information including a plurality of landing distances to a landing plane measured periodically measured in a preset time period; and

determining the movable object is in the landed state in response to the relative altitude information satisfying a preset landed criterion, wherein the relative altitude information satisfying the preset landed criterion includes:

a number of distances among the plurality of landing distances smaller than a distance threshold reaches a threshold number within the preset time period set forth in the preset landed criterion, wherein a starting time of the preset time period is refreshed and restarted in response to determining that two landing distances detected consecutively are greater than the distance threshold.

11. A movable object, comprising:

a propulsion component; and

a controller configured to:

in response to an operating state of the movable object being a landed state and a triggering condition being satisfied, control to shut down a propulsion output of the movable object such that the movable object completes automatic power off after landing, the triggering condition including determining that the propulsion output is currently enabled and an automatic take-off operation is not currently performed.

12. The movable object of claim 11 , further comprising:

a sensor configured to obtain operational information of the movable object, the operational information including at least one of relative altitude information, absolute altitude information, or movement information;

wherein the controller is further configured to determine the movable object is in the landed state in response to the operational information satisfying a landed criterion.

13. The movable object of claim 12 , wherein:

the sensor includes a distance measuring sensor configured to obtain relative altitude information of the movable object, the relative altitude information including a landing distance to a landing plane; and

the controller is further configured to determine the movable object is in the landed state in response to the relative altitude information satisfying a preset landed criterion, the relative altitude information satisfying the preset landed criterion including that a number of times the landing distance is measured to be smaller than a distance threshold reaches a threshold number within a preset time period set forth in the preset landed criterion.

14. The movable object of claim 12 , wherein:

the sensor includes an altitude sensor configured to obtain absolute altitude information of the movable object during current flight process; and

the controller is further configured to:

perform calculation on the absolute altitude information to obtain an absolute altitude variance; and

determine that a preset landed criterion is satisfied and the movable object is in the landed state in response to the variance being smaller than a variance threshold set forth in the preset landed criterion and the current flight process is a descending process.

15. The movable object of claim 12 , wherein:

the sensor includes:

a distance measuring sensor configured to obtain the relative altitude information of the movable object at a time interval, the relative altitude information including a landing distance to a landing plane; and

an altitude sensor configured to obtain the absolute altitude information of the movable object during current flight process; and

the controller is further configured to:

determine an operating state of the distance measuring sensor;

in response to the operating state of the distance measuring sensor being a normal state:

trigger the distance measuring sensor to measure the landing distance from the movable object to the landing plane; and

determine that a first preset landed criterion is satisfied and the movable object is in the landed state in response to a number of times the landing distance is measured to be smaller than a distance threshold reaching a threshold number within a preset time period; and

in response to the operating state of the distance measuring sensor being an abnormal state:

obtain the absolute altitude information of the movable object during the current flight process;

perform calculation on the absolute altitude information to obtain an absolute altitude variance; and

determine that a second preset landed criterion is satisfied and the movable object is in the landed state in response to the variance being smaller than a variance threshold and the current flight process is a descending process.

16. The movable object of claim 11 , further comprising:

an inertial measurement unit configured to measure movement information of the movable object;

the controller is further configured to:

obtain the movement information of the movable object from the inertial measurement unit;

determine whether the movable object has landed according to the movement information; and

determine the movable object is in the landed state in response to determining that the movable object has landed.

17. The movable object of claim 11 , wherein the controller is further configured to:

detect a position of a throttle joystick of a remote controller of the movable object in response to a number of times that the movable object is detected as being in the landed state being greater than a preset threshold; and

trigger to shut down the propulsion output of the movable object in response to the throttle joystick of the remote controller being at a lowest position where the movable object is required to land.

18. The movable object of claim 11 , wherein:

the controller is further configured to send a power off instruction to the propulsion component; and

the propulsion component is configured to shut down the propulsion output in response to the power off instruction.

19. The movable object of claim 11 , further comprising:

a power supply;

wherein:

the controller is further configured to send a turning off instruction to the power supply; and

the power supply is configured to shut down powering to the propulsion component in response to the turning off instruction.

20. The movable object of claim 11 , wherein the controller is further configured to:

obtain relative altitude information of the movable object, the relative altitude information including a plurality of landing distances to a landing plane measured periodically measured in a preset time period; and

determine the movable object is in the landed state in response to the relative altitude information satisfying a preset landed criterion, wherein the relative altitude information satisfying the preset landed criterion includes:

a number of distances among the plurality of landing distances smaller than a distance threshold reaches a threshold number within the preset time period set forth in the preset landed criterion, wherein a starting time of the preset time period is refreshed and restarted in response to determining that two landing distances detected consecutively are greater than the distance threshold.

Assignments (1)

Continuity (5)

References Cited (15)