Multi-mode unmanned aerial vehicle and control method

Abstract

The embodiment of the invention discloses a multi-mode unmanned aerial vehicle and a control method. The multi-mode unmanned aerial vehicle comprises a main power supply; a standby power supply; the flight controller is respectively connected with the main power supply and the standby power supply and is used for controlling the multi-mode unmanned aerial vehicle to carry out flight operation; the parachute is connected with the main power source and the standby power source and used for assisting the multi-mode unmanned aerial vehicle in landing operation; when the multi-mode unmanned aerial vehicle is in a landing operation state, the flight controller is further used for controlling the standby power supply to open the parachute to supply power to the parachute; when the multi-mode unmanned aerial vehicle is in the power-off failure state of the main power supply, the flight controller is further used for controlling the standby power supply to supply power to the multi-mode unmanned aerial vehicle so as to guarantee normal flight operation of the multi-mode unmanned aerial vehicle, and then it is guaranteed that the unmanned aerial vehicle can continue to fly under the short-time power-off condition; and the crash risk of the unmanned aerial vehicle is reduced.

Description

Technical Field

[0001] The present application relates to the field of UAV technology, and in particular to a multi-mode UAV and a control method thereof. Background Art

[0002] A drone is an unmanned aircraft controlled by a radio remote control device and a self-contained program control device. It has a wide range of uses, low cost, no risk of casualties, and is easy to use. It has a variety of take-off and landing methods and is suitable for use in a variety of environments and conditions. With the increasing popularity of Internet logistics, the rapid development of logistics and transportation has also promoted the entry of drone applications. Drones will be able to reduce traffic bottlenecks and tedious logistics work that requires manpower. At the same time, the speed, safety, and tracking system of drones can also help merchants deliver goods faster and more safely, making logistics more efficient.

[0003] In the prior art, the parachute of a drone is usually powered by a power battery on the drone or a dedicated battery for the parachute. When the power battery fails, the dedicated battery of the parachute is only used to power the parachute, and cannot power the flight controller, causing the flight controller to fail to work, which in turn causes the risk of the drone falling during flight operations. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present application provides a multi-mode UAV and a control method, which aims to solve the technical problem in the prior art that the flight controller cannot work after the power battery fails to power on.

[0005] To solve the above problems, in a first aspect, an embodiment of the present application provides a multi-mode drone, which includes:

[0006] Main power supply;

[0007] Backup power supply;

[0008] A flight controller, connected to the main power supply and the backup power supply respectively, and used to control the multi-mode UAV to perform flight operations;

[0009] A parachute, connected to the backup power supply and used to assist the multi-mode UAV in landing operations;

[0010] Among them, when the multi-mode UAV is in a landing operation state, the flight controller is also used to control the backup power supply to supply power to the parachute for opening the parachute; when the multi-mode UAV is in a state where the main power supply is powered off and fails, the flight controller is also used to control the backup power supply to supply power to the multi-mode UAV to ensure that the multi-mode UAV can perform normal flight operations.

[0011] Furthermore, the multi-mode UAV also includes a switch module, which is respectively connected to the main power supply, the backup power supply, the flight controller and the parachute. The flight controller is also used to control the on and off of the switch module to enable the main power supply or the backup power supply to power the multi-mode UAV.

[0012] Furthermore, in the multi-mode UAV, the flight controller also controls the on-off of the switch module by monitoring the working status of the backup power supply, so that the main power supply supplies power to the backup power supply.

[0013] Furthermore, in the multi-mode drone, the switch module includes a diode D1, a diode D2, and a diode D3;

[0014] The anode of the diode D1 is connected to the main power supply, and the cathode of the diode D1 is connected to the cathode of the diode D3, the backup power supply, the flight controller and the parachute respectively;

[0015] The anode of the diode D2 is connected to the main power supply, and the cathode of the diode D2 is connected to the backup power supply;

[0016] The anode of the diode D3 is connected to the backup power supply, and the cathode of the diode D3 is connected to the backup power supply, the flight controller and the parachute respectively.

[0017] Furthermore, in the multi-mode UAV, the flight controller is also used to control the main power supply to supply power to the parachute for opening.

[0018] Furthermore, the multi-mode UAV also includes a radio module, which is connected to the main power supply and the backup power supply respectively, and is used to send status information of the current flight of the multi-mode UAV, and the status information includes attitude information, position information, speed information and altitude information.

[0019] Furthermore, the multi-mode UAV also includes a GPS module, which is respectively connected to the main power supply, the backup power supply, and the radio module, and is used to obtain the location information of the multi-mode UAV.

[0020] Furthermore, the multi-mode UAV also includes an RTK module, which is respectively connected to the main power supply, the backup power supply, and the radio module, and is used to locate the current position of the multi-mode UAV.

[0021] Furthermore, the multi-mode drone also includes an airbag and a recorder, wherein the airbag and the recorder are respectively connected to the main power supply and the backup power supply, the airbag is used to provide cushioning for the multi-mode drone when it lands, and the recorder is used to generate a flight log of the multi-mode drone.

[0022] In a second aspect, an embodiment of the present application further provides a control method, which is applied to a multi-mode drone, wherein the multi-mode drone includes a main power supply, a backup power supply, a flight controller, and a parachute, wherein the flight controller is connected to the main power supply and the backup power supply, respectively, and the parachute is connected to the backup power supply; the control method includes:

[0023] When the multi-mode UAV is in a landing operation state, the flight controller controls the backup power supply to supply power to the parachute to start opening the parachute;

[0024] When the multi-mode UAV is in a state where the main power supply is powered off and fails, the flight controller controls the backup power supply to supply power to the multi-mode UAV to ensure that the multi-mode UAV can perform normal flight operations.

[0025] The multi-mode UAV provided in the embodiment of the present application includes a main power supply, a backup power supply, a flight controller and a parachute. The flight controller is connected to the main power supply and the backup power supply respectively, and the parachute is connected to the backup power supply. Therefore, when the multi-mode UAV is in a landing state, the flight controller can control the backup power supply to supply power to the parachute for opening the parachute; and when the multi-mode UAV is in a main power failure state, the flight controller can control the backup power supply to supply power to the multi-mode UAV to ensure that the multi-mode UAV can perform normal flight operations, thereby ensuring that the UAV can continue to fly in the event of a short power outage, reducing the risk of the UAV crashing. At the same time, the backup power supply can be used as the parachute's own power supply, without increasing the weight of the UAV, thereby ensuring the UAV's endurance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic block diagram of a multi-mode drone provided in an embodiment of the present application;

[0028] Figure 2 Another schematic block diagram of a multi-mode drone provided in an embodiment of the present application;

[0029] Figure 3 Another schematic block diagram of a multi-mode drone provided in an embodiment of the present application;

[0030] Figure 4 A flow chart of a control method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0033] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0034] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0035] As analyzed in the background technology of this application, after the power battery of the existing UAV fails due to power failure, the flight controller 13 cannot work. In order to solve the above technical problems, this application provides a multi-mode UAV 10.

[0036] See also Figure 1 , Figure 1 A schematic block diagram of a multi-mode drone 10 provided in an embodiment of the present application.

[0037] like Figure 1 As shown, a multi-mode drone 10 includes:

[0038] Main power supply 11;

[0039] Backup power supply 12;

[0040] A flight controller 13, connected to the main power supply 11 and the backup power supply 12, respectively, and used to control the multi-mode UAV 10 to perform flight operations;

[0041] A parachute 14, connected to the backup power supply 12, and used to assist the multi-mode UAV 10 in landing operations;

[0042] Among them, when the multi-mode UAV 10 is in a landing operation state, the flight controller 13 is also used to control the backup power supply 12 to supply power to the parachute 14 for opening the parachute; when the multi-mode UAV 10 is in a power-off failure state of the main power supply 11, the flight controller 13 is also used to control the backup power supply 12 to supply power to the multi-mode UAV 10 to ensure that the multi-mode UAV 10 can perform normal flight operations.

[0043] In this embodiment, when the multi-mode UAV 10 is in a normal flight operation state and the main power supply 11 is not powered off and failed, the backup power supply 12 does not need to power the flight controller 13. At this time, only the main power supply 11 needs to power the flight operation of the multi-mode UAV 10, that is, the main power supply 11 powers the flight controller 13, and the power supply path between the flight controller 13 and the backup power supply 12 is disconnected. The flight controller 13 only needs to control the power supply path between the parachute 14 and the backup power supply 12, so that the backup power supply 12 provides power for the parachute 14 to open the parachute.

[0044] At the same time, the on-off of the power supply path between the flight controller 13 and the backup power supply 12 and between the parachute 14 and the backup power supply 12 are controlled by the flight control command of the flight controller 13, that is, whether the backup power supply 12 supplies power to the flight controller 13 and the parachute 14 is controlled by the flight control command of the flight controller 13. Among them, the flight control command for controlling the power supply path between the flight controller 13 and the backup power supply 12 and the flight control command for controlling the on-off of the power supply path between the parachute 14 and the backup power supply 12 can be the same flight control command or two different flight control commands. The flight control command for controlling the two power supply paths can be selected according to the actual application, and this embodiment does not make specific limitations.

[0045] Among them, the main power supply 11 is the power battery of the multi-mode drone 10, which mainly provides power for the multi-mode drone 10, and the backup power supply 12 is the backup battery of the multi-mode drone 10, which mainly provides power for the parachute 14 in the multi-mode drone 10 to open the parachute.

[0046] The multi-mode UAV 10 provided in the present application includes a main power supply 11, a backup power supply 12, a flight controller 13 and a parachute 14. The flight controller 13 is connected to the main power supply 11 and the backup power supply 12 respectively, and the parachute 14 is connected to the backup power supply 12. When the multi-mode UAV 10 is in a landing state, the flight controller 13 can control the backup power supply 12 to supply power to the parachute 14 for opening the parachute; and when the multi-mode UAV 10 is in a power failure state due to the main power supply 11, the flight controller 13 can control the backup power supply 12 to supply power to the multi-mode UAV 10 to ensure that the multi-mode UAV 10 can perform normal flight operations, thereby ensuring that the UAV can continue to fly in the event of a short power outage, reducing the risk of the UAV crashing. At the same time, the backup power supply 12 can be used as the power supply of the parachute 14, without increasing the weight of the UAV, thereby ensuring the endurance of the UAV.

[0047] In some embodiments, Figure 2 As shown, the multi-mode UAV 10 also includes a switch module 15, which is respectively connected to the main power supply 11, the backup power supply 12, the flight controller 13 and the parachute 14. The flight controller 13 is also used to control the on and off of the switch module 15 to enable the main power supply 11 or the backup power supply 12 to power the multi-mode UAV 10.

[0048] In the present embodiment, the switch module 15 is mainly used to open or close the power supply path between the flight controller 13 and the backup power supply 12, or the power supply path between the parachute 14 and the backup power supply 12, or the power supply path between the flight controller 13 and the main power supply 11. The on and off of the switch module 15 can be controlled by the flight control command output by the flight control controller. When the multi-mode UAV 10 is in a normal flight operation state, the flight controller 13 can open the power supply path between the flight controller 13 and the main power supply 11 through the switch module 15, so that the main power supply 11 supplies power to the flight controller 13, ensuring that the multi-mode UAV 10 can perform flight operations normally. At the same time, the flight controller 13 can open the power supply path between the parachute 14 and the backup power supply 12 through the switch module 15, so that the backup power supply 12 supplies power to the parachute 14 for opening the parachute, ensuring that the multi-mode UAV 10 can smoothly perform flight and descent operations; when the multi-mode UAV 10 is in the main power state, the flight controller 13 can open the power supply path between the parachute 14 and the backup power supply 12, so that the backup power supply 12 supplies power to the parachute 14 for opening the parachute, ensuring that the multi-mode UAV 10 can smoothly perform flight and descent operations. When the power source 11 is in a power-off state, the flight controller 13 can open the power supply path between the flight controller 13 and the backup power supply 12 through the switch module 15, so that the backup power supply 12 supplies power to the flight controller 13, ensuring that the multi-mode UAV 10 can perform a short period of normal flight operation. At the same time, on this basis, the flight controller 13 can also open the power supply path between the parachute 14 and the backup power supply 12 through the switch module 15, so that the backup power supply 12 supplies power to the parachute 14 for opening the parachute, ensuring that the multi-mode UAV 10 can smoothly perform the flight and descent operation, thereby avoiding the UAV from falling and being damaged.

[0049] In some embodiments, the flight controller 13 also controls the on / off of the switch module 15 by monitoring the working status of the backup power supply 12 , so that the main power supply 11 supplies power to the backup power supply 12 .

[0050] In this embodiment, the flight controller 13 is also used to monitor the working state of the backup power supply 12, and control the on-off of the switch module 15 by monitoring the working state of the backup power supply 12. The flight controller 13 specifically monitors the voltage, power and other information of the backup power supply 12. The working state of the backup power supply 12 includes the backup power supply 12 power-off state, external power supply state and the like. By monitoring the working state of the backup power supply 12 by the flight controller 13 and controlling the on-off of the switch module 15, it can not only ensure that when the backup battery is in a power-off state, the main power supply 11 is opened to supply power to the backup power supply 12, so as to avoid the backup battery being in a power-off state for a long time, thereby causing the flight controller 13 to fail to work normally when the main power supply 11 fails to power off for a short time, but also ensure that when the multi-mode UAV 10 is performing normal flight operations, the backup power supply 12 module only supplies power to the parachute 14, thereby avoiding the backup power supply 12 from supplying power to the outside, thereby causing the backup power supply 12 to be in a power-off state.

[0051] In some embodiments, a wake-up module may also be provided in the parachute 14, and the wake-up module is respectively connected to the backup power supply 12 and the flight controller 13. The wake-up module is mainly used to use a wake-up signal to wake up the backup power supply 12 to power the core components such as the flight controller 13 in the multi-mode UAV 10. The wake-up module can be set to output a wake-up signal at regular intervals (every 5 hours or 4 hours, etc.) to wake up the backup power supply 12 to power the core components such as the flight controller 13 in the multi-mode UAV 10. When the wake-up module outputs a wake-up signal to the backup power supply 12, it sends a notification signal to the flight controller 13 and waits for the flight controller 13 to send a flight control instruction. The flight controller 13 determines whether the backup power supply 12 needs to power the multi-mode UAV 10 according to the notification signal. The backup power supply 12 is used to power the flight controller 13 and other core components in the multi-mode UAV 10. If the backup power supply 12 is not needed to power the flight controller 13 and other core components in the multi-mode UAV 10, the flight controller 13 does not need to issue a flight control instruction. After the wake-up module does not receive the flight control instruction of the flight controller 13 within the preset time, the backup power supply 12 will not be turned on to power the flight controller 13 and other core components in the multi-mode UAV 10; if the backup power supply 12 is needed to power the flight controller 13 and other core components in the multi-mode UAV 10, the flight controller 13 needs to issue a flight control instruction within the preset time. After the wake-up module receives the flight control instruction of the flight controller 13, the backup power supply 12 is turned on to power the flight controller 13 and other core components in the multi-mode UAV 10.

[0052] In some embodiments, a query module can also be set in the parachute 14, and the query module is used to query the voltage, power and other information of the backup power supply 12. The query module can send the queried information to the background, and the background will notify the flight controller 13 based on the received information to decide whether to control the main power supply 11 to supply power to the backup power supply 12, thereby realizing the monitoring and alarm of the backup power supply 12 by the flight controller 13.

[0053] In some embodiments, Figure 3 As shown, the switch module 15 includes a diode D1, a diode D2 and a diode D3; wherein the anode of the diode D1 is connected to the main power supply 11, and the cathode of the diode D1 is respectively connected to the cathode of the diode D3, the backup power supply 12, the flight controller 13 and the parachute 14; the anode of the diode D2 is connected to the main power supply 11, and the cathode of the diode D2 is connected to the backup power supply 12; the anode of the diode D3 is connected to the backup power supply 12, and the cathode of the diode D3 is respectively connected to the backup power supply 12, the flight controller 13 and the parachute 14.

[0054] In this embodiment, the diode D1, the diode D2 and the diode D3 may be some components in the switch module 15. The diode D1 is mainly used to prevent the backup power supply 12 from backflowing into the IO board CPU of the multi-mode drone 10 when the backup power supply 12 supplies power to the core components such as the flight controller 13 in the multi-mode drone 10, thereby avoiding damage to the core components of the drone; the diode D2 is mainly used to enable the main power supply 11 to charge the backup power supply 12, and to avoid the backup power supply 12 reversely charging the main power supply 11 in the charging path, thereby causing damage to the components; the diode D3 is mainly used to enable the backup power supply 12 to supply power to the core components such as the flight controller 13 in the multi-mode drone 10, while avoiding the main power supply 11 supplying power to the backup power supply 12 in the path when the main power supply 11 supplies power to the core components such as the flight controller 13 in the multi-mode drone 10, thereby causing damage to the components.

[0055] In some embodiments, the flight controller 13 is also used to control the main power supply 11 to supply power to the parachute 14 for opening. Specifically, the controller can control the on and off of the switch module 15, thereby enabling the main power supply 11 to supply power to the parachute 14 for opening.

[0056] In some embodiments, Figure 3 As shown, the multi-mode UAV 10 also includes a radio module 16, which is connected to the main power supply 11 and the backup power supply 12 respectively. The radio module 16 is used to send the current flight status information of the multi-mode UAV 10, and the status information includes attitude information, position information, speed information and altitude information.

[0057] In this embodiment, the radio module 16 is provided with a private network and a 4G module, and the current flight status information of the drone and the current status information of the backup power supply 12 can be sent to the background by the radio module 16 through the private network and the 4G module, so that the background can timely notify the flight controller 13 to perform corresponding operations. At the same time, when the multi-mode drone 10 is in a power failure state of the main power supply 11, the radio module 16 can also be powered by the backup power supply 12.

[0058] In some embodiments, Figure 3 As shown, the multi-mode drone 10 also includes a GPS module 17 , which is respectively connected to the main power supply 11 , the backup power supply 12 , and the radio module 16 , and is used to obtain location information of the multi-mode drone 10 .

[0059] In this embodiment, by connecting the GPS module 17 to the backup power supply 12, the backup power supply 12 can be used to power the GPS module 17 when the multi-mode drone 10 is in a state where the main power supply 11 is powered off and fails, so that the GPS module 17 can collect the current position coordinates of the multi-mode drone 10 in real time, and then can timely track the position of the multi-mode drone 10 when the main power supply 11 is temporarily powered off and fails.

[0060] In some embodiments, Figure 3 As shown, the multi-mode drone 10 also includes an RTK (Real-Time Kinematic) module 18, and the RTK module 18 is respectively connected to the main power supply 11, the backup power supply 12, and the radio module 16. The RTK module 18 is used to locate the current position of the multi-mode drone 10.

[0061] In this embodiment, by connecting the RTK module 18 to the backup power supply 12, the backup power supply 12 can be used to power the RTK module 18 when the multi-mode UAV 10 is in a state where the main power supply 11 is powered off and fails, thereby avoiding the multi-mode UAV 10 from losing accurate measurement and navigation when the main power supply 11 is temporarily powered off and fails.

[0062] In some embodiments, Figure 3 As shown, the multi-mode drone 10 also includes an airbag 20 and a recorder 19. The airbag 20 and the recorder 19 are respectively connected to the main power supply 11 and the backup power supply 12. The airbag 20 is used to provide cushioning for the multi-mode drone 10 when it lands, and the recorder 19 is used to generate a flight log of the multi-mode drone 10.

[0063] In this embodiment, the airbag 20 can not only provide a buffer when the multi-mode drone 10 lands, reduce the damage to the multi-mode drone 10, and ensure the safety of ground personnel and objects, but also enable the multi-mode drone 10 to float on the water and mark after falling on the sea or water. The recorder 19 is used to record the flight operation log of the multi-mode drone 10, which may include the use log of the backup power supply 12. The recorder 19 can be provided with a WiFi module, so that the flight operation log of the multi-mode drone 10 can be sent to the background. In this application, by connecting the airbag 20 and the recorder 19 to the backup power supply 12 respectively, the backup power supply 12 can be used to power the airbag 20 and the recorder 19 respectively when the multi-mode drone 10 is in a power failure state of the main power supply 11, which not only avoids the loss of the flight operation log of the multi-mode drone 10 when the main power supply 11 is temporarily powered off, but also prevents the multi-mode drone 10 from failing to open the airbag 20 in time when the landing.

[0064] In some embodiments, Figure 1 and Figure 4 As shown, the present application also provides a control method, which is applied to a multi-mode UAV 10, wherein the multi-mode UAV 10 includes a main power supply 11, a backup power supply 12, a flight controller 13 and a parachute 14, wherein the flight controller 13 is respectively connected to the main power supply 11 and the backup power supply 12, and the parachute 14 is connected to the backup power supply 12; the control method includes steps S10 and S20.

[0065] S10, when the multi-mode UAV 10 is in a landing operation state, the flight controller 13 controls the backup power supply 12 to supply power to the parachute 14 to start opening the parachute;

[0066] S20. When the multi-mode UAV 10 is in a power-off state of the main power supply 11, the flight controller 13 controls the backup power supply 12 to supply power to the multi-mode UAV 10 to ensure that the multi-mode UAV 10 can perform normal flight operations.

[0067] The present application sets a main power supply 11, a backup power supply 12, a flight controller 13 and a parachute 14 in a multi-mode UAV 10, wherein the flight controller 13 is connected to the main power supply 11 and the backup power supply 12 respectively, and the parachute 14 is connected to the backup power supply 12, so that when the multi-mode UAV 10 is in a landing state, the flight controller 13 can control the backup power supply 12 to supply power to the parachute 14 for opening the parachute; and when the multi-mode UAV 10 is in a power failure state due to the main power supply 11, the flight controller 13 can control the backup power supply 12 to supply power to the multi-mode UAV 10 to ensure that the multi-mode UAV 10 can perform normal flight operations, thereby ensuring that the UAV can continue to fly in the event of a short power outage, reducing the risk of the UAV crashing, and at the same time, the backup power supply 12 can be used as the power supply of the parachute 14, without increasing the weight of the UAV, thereby ensuring the endurance of the UAV.

[0068] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A multi-mode drone, characterized in that: include: Main power supply; Backup power supply; A flight controller, connected to the main power supply and the backup power supply respectively, and used to control the multi-mode UAV to perform flight operations; A parachute, connected to the backup power supply and used to assist the multi-mode UAV in landing operations; Among them, when the multi-mode UAV is in a landing operation state, the flight controller is also used to control the backup power supply to supply power to the parachute for opening the parachute; when the multi-mode UAV is in a state where the main power supply is powered off and fails, the flight controller is also used to control the backup power supply to supply power to the multi-mode UAV to ensure that the multi-mode UAV can perform normal flight operations.

2. The multi-mode drone according to claim 1, characterized in that: It also includes a switch module, which is respectively connected to the main power supply, the backup power supply, the flight controller and the parachute. The flight controller is also used to control the on and off of the switch module to enable the main power supply or the backup power supply to power the multi-mode drone.

3. The multi-mode drone according to claim 2, characterized in that: The flight controller also controls the on-off of the switch module by monitoring the working status of the backup power supply, so that the main power supply supplies power to the backup power supply.

4. The multi-mode drone according to claim 2 or 3, characterized in that: The switch module includes a diode D1, a diode D2 and a diode D3; The anode of the diode D1 is connected to the main power supply, and the cathode of the diode D1 is connected to the cathode of the diode D3, the backup power supply, the flight controller and the parachute respectively; The anode of the diode D2 is connected to the main power supply, and the cathode of the diode D2 is connected to the backup power supply; The anode of the diode D3 is connected to the backup power supply, and the cathode of the diode D3 is connected to the backup power supply, the flight controller and the parachute respectively.

5. The multi-mode drone according to claim 1, characterized in that: The flight controller is also used to control the main power supply to supply power to the parachute for opening.

6. The multi-mode UAV according to claim 1, characterized in that: It also includes a radio module, which is connected to the main power supply and the backup power supply respectively. The radio module is used to send the current flight status information of the multi-mode UAV, and the status information includes attitude information, position information, speed information and altitude information.

7. The multi-mode drone according to claim 6, characterized in that: It also includes a GPS module, which is connected to the main power supply, the backup power supply, and the radio module respectively, and is used to obtain the location information of the multi-mode UAV.

8. The multi-mode drone according to claim 6, characterized in that: It also includes an RTK module, which is connected to the main power supply, the backup power supply, and the radio module respectively, and is used to locate the current position of the multi-mode UAV.

9. The multi-mode drone according to claim 1, characterized in that: It also includes an airbag and a recorder, wherein the airbag and the recorder are respectively connected to the main power supply and the backup power supply, the airbag is used to provide cushioning when the multi-mode drone lands, and the recorder is used to generate a flight log of the multi-mode drone.

10. A control method, characterized in that: Applied to a multi-mode UAV, the multi-mode UAV includes a main power supply, a backup power supply, a flight controller and a parachute, the flight controller is connected to the main power supply and the backup power supply respectively, and the parachute is connected to the backup power supply; the control method includes: When the multi-mode UAV is in a landing operation state, the flight controller controls the backup power supply to supply power to the parachute to start opening the parachute; When the multi-mode UAV is in a state where the main power supply is powered off and fails, the flight controller controls the backup power supply to supply power to the multi-mode UAV to ensure that the multi-mode UAV can perform normal flight operations.

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