Power supply system of unmanned aerial vehicle

Abstract

The invention provides a power supply system of an unmanned aerial vehicle, which comprises a power supply integration module, a control module, multiple input power supplies and power supply input control modules corresponding to each input power supply, and each input power supply is connected to the power supply integration module through the corresponding power supply input control module. The power supply input control module is further connected to the control module, the power supply integration module is further connected to the multiple paths of power supply output interfaces, and the control module executes the steps that a power supply switching instruction is received, and the power supply switching instruction comprises a target input power supply and a target switching state corresponding to the target input power supply; and according to the power supply switching instruction, controlling a power supply input control module corresponding to the target input power supply to act, so that the target input power supply is switched to a target switching state indicated by the power supply switching instruction. Through the power supply input control modules corresponding to the multiple input power supplies, input isolation and mutual power conversion among the input power supplies are realized, and the power supply stability of the unmanned aerial vehicle is improved.

Description

Technical Field

[0001] This application relates to the technical field of UAV power supply systems, and in particular to a power supply system for UAVs. Background Art

[0002] In the current development of UAVs, UAVs are characterized by small size and low cost. UAVs are used to perform different flight tasks, and the requirements for power supply and distribution are the most stringent. The stability of power supply directly affects whether the UAV can be put into use. The power supply input forms of UAVs in different flight states are different, including ground power supply, on-board battery power supply, and generator power supply. In the case of multi-channel input power supply, currently commonly used UAVs only illustrate that the multi-channel power supply form can use the hardware principle for switching. However, in actual use, multiple power supply inputs require software support for free manual switching, and when switching between multiple power supply methods, it is impossible to ensure that other power supply inputs are not affected. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide at least a power supply system for UAVs, which realizes input isolation and mutual power transfer between each input power supply through a power input control module corresponding to a multi-channel input power supply, and improves the power supply stability of the UAV.

[0004] This application mainly includes the following aspects:

[0005] An embodiment of this application provides a power supply system for a UAV. The power supply system includes a power integration module, a control module, a multi-channel input power supply, and a power input control module corresponding to each input power supply. Each input power supply is connected to the power integration module through its corresponding power input control module. The power input control module is also connected to the control module. The power integration module is also respectively connected to a multi-channel power output interface. Among them, the control module executes: receiving a power supply switching instruction, where the power supply switching instruction includes a target input power supply and its corresponding target switching state; according to the power supply switching instruction, controlling the power input control module corresponding to the target input power supply to act, so that the target input power supply is switched to the target switching state indicated by the power supply switching instruction.

[0006] In a possible implementation, the input power supply includes a ground power supply input source and multiple non-ground power supply input sources. The control module includes a ground control unit corresponding to the ground power supply input source and an airborne control unit corresponding to the non-ground power supply input sources. The power supply switching instruction includes a first power supply switching instruction and a second power supply switching instruction. Among them, the ground control unit performs: receiving the first power supply switching instruction for the ground power supply input source; according to the first power supply switching instruction, controlling the power input control module corresponding to the ground power supply input source to act, so that the ground power supply input source is switched to the target switching state indicated by the first power supply switching instruction; the airborne control unit performs: receiving the second power supply switching instruction for the target non-ground power supply input source; according to the second power supply switching instruction, controlling the power input control module corresponding to the target non-ground power supply input source to act, so that the target non-ground power supply input source is switched to the target switching state indicated by the second power supply switching instruction.

[0007] In a possible implementation, the power input control module includes an input power supply switching unit and a first isolation protection unit. For each power input control module: the input end of the input power supply switching unit is connected to the corresponding input power supply, the output end of the input power supply switching unit is connected to the input end of the first isolation protection unit, the output end of the first isolation protection unit is connected to the input end of the power integration module, and the control end of the input power supply switching unit is connected to the control module; among them, the control module controls the input power supply switching unit corresponding to the target input power supply to act according to the power supply switching instruction, so that the target input power supply is switched to the target switching state indicated by the power supply switching instruction.

[0008] In a possible implementation, the input power supply switching unit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first control switch, a second control switch, and a solid-state relay. One end of the first resistor is respectively connected to the corresponding input power supply, the first connection end of the first control switch, and the first connection end of the solid-state relay. The other end of the first resistor is respectively connected to one end of the second resistor, the control end of the first control switch, and the second connection end of the solid-state relay. The second connection end of the first control switch is connected to the input end of the first isolation protection unit; the other end of the second resistor is connected to the first connection end of the second control switch. The control end of the second control switch is respectively connected to one end of the third resistor and one end of the fourth resistor. The other end of the fourth resistor is connected to the second connection end of the second control switch and then grounded. The control end of the solid-state relay and the other end of the third resistor are respectively connected to the control module; wherein, the control module executes: if the target access state is access, then by controlling the second control switch corresponding to the target input power supply to conduct and the solid-state relay to disconnect, the target input power supply is connected to the power integration module through the first control switch and the first isolation protection unit; if the target access state is cut out, then by controlling the second control switch corresponding to the target input power supply to disconnect and the solid-state relay to close, the target input power supply is cut out from the power integration module.

[0009] In a possible implementation, the first isolation protection unit includes a third control switch and a diode controller. Wherein, the first connection end of the third control switch is respectively connected to the second connection end of the first control switch in the input power supply switching unit and the input end of the diode controller. The control end of the third control switch is connected to the gate terminal of the diode controller. The second connection end of the third control switch is respectively connected to the output end of the diode controller and the power integration module.

[0010] In a possible implementation, the power supply system further includes a power charging module and a second isolation protection unit. The multiple non-ground power supply input sources include an on-board battery. The charger is connected to one end of the power charging module through the external charging interface of the unmanned aerial vehicle. The other end of the power charging module is connected to the input end of the second isolation protection unit. The output end of the second isolation protection unit is connected to the charge and discharge interface of the on-board battery.

[0011] In a possible implementation, the power supply system further includes a DC-DC converter, a first dual-switch driving unit, an ignition circuit driving unit corresponding to each pyrotechnic output circuit, and a pyrotechnic circuit resistance acquisition unit. Among them, the input end of the DC-DC converter is connected to the power integration module, the output end of the DC-DC converter is connected to the input end of the first dual-switch driving unit through the first pyrotechnic bus, the driving end of the first dual-switch driving unit is connected to the airborne control unit, the output end of the first dual-switch driving unit is respectively connected to the input ends of each ignition circuit driving unit through the second pyrotechnic bus, the driving end of each ignition circuit driving unit is connected to the airborne control unit, the output end of each ignition circuit driving unit is connected to the corresponding pyrotechnic output circuit, and the pyrotechnic circuit resistance acquisition unit is connected to the second pyrotechnic bus; wherein, the airborne control unit performs: receiving an ignition trigger signal, starting the DC-DC converter, the first dual-switch driving unit, and the pyrotechnic circuit resistance acquisition unit; receiving an ignition driving control instruction, the ignition driving control instruction including the target pyrotechnic output circuit that needs to be ignited; starting the ignition circuit driving unit corresponding to the target pyrotechnic output circuit to ignite the pyrotechnic device connected thereto through the target pyrotechnic output circuit.

[0012] In a possible implementation, the first dual-switch driving unit includes a first dual-switch driving component, a first gate driving chip, a fifth resistor, and a sixth resistor. The first dual-switch driving component includes a fourth control switch and a fifth control switch. Among them, the first connection end of the fourth control switch is connected to the output end of the DC-DC converter, the first connection end of the fifth control switch is respectively connected to the input ends of each ignition circuit driving unit, the second connection end of the fourth control switch is respectively connected to the second connection end of the fifth control switch and the power ground end of the first gate driving chip, the driving end of the first gate driving chip is respectively connected to one end of the fifth resistor and one end of the sixth resistor, the other end of the fifth resistor is connected to the control end of the fourth control switch, the other end of the sixth resistor is connected to the control end of the fifth control switch, and the input end of the first gate driving chip is connected to the airborne control unit; the airborne control unit performs: in response to the ignition trigger signal, making the first dual-switch driving component conduct through the first gate driving chip, so that the voltage signal output by the DC-DC converter is respectively input into each ignition circuit driving unit and the pyrotechnic circuit resistance acquisition unit.

[0013] In a possible implementation manner, the ignition circuit driving unit includes a sixth control switch, a seventh resistor, a second gate driving chip, and a short-circuit protection circuit. Among them, the first connection end of the sixth control switch is connected to the output end of the first dual-switch driving unit. The output end of the sixth control switch is respectively connected to the short-circuit protection circuit, the power ground terminal of the second gate driving chip, and the corresponding pyrotechnic output circuit. The control end of the sixth control switch is connected to one end of the seventh resistor, and the other end of the seventh resistor is connected to the driving end of the second gate driving chip. The input end of the second gate driving chip is connected to the airborne control unit. Among them, the airborne control unit performs: in response to an ignition driving control instruction, makes the sixth control switch conduct through the second gate driving chip, so that the voltage signal output by the first dual-switch driving unit is respectively input into the ignition circuit driving unit corresponding to the target pyrotechnic output circuit, to ignite the pyrotechnic device corresponding to the target pyrotechnic output circuit.

[0014] In a possible implementation manner, the pyrotechnic circuit resistance acquisition unit includes a constant current source, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, an operational amplifier, and a second dual-switch driving unit. Among them, the input end of the constant current source is connected to the power supply, the output end of the constant current source is connected to one end of the eighth resistor, the setting end of the constant current source is connected to one end of the ninth resistor. After the other ends of the eighth resistor and the ninth resistor are connected, they are respectively connected to one end of the tenth resistor and the input end of the second dual-switch driving unit. The other end of the tenth resistor is respectively connected to one end of the eleventh resistor and the non-inverting input terminal of the operational amplifier. The other end of the eleventh resistor is grounded. The inverting input terminal of the operational amplifier is respectively connected to one end of the twelfth resistor and one end of the thirteenth resistor. The other end of the twelfth resistor is grounded. The other end of the thirteenth resistor is connected to the output end of the operational amplifier and the airborne control unit. The driving end of the second dual-switch driving unit is connected to the airborne control unit, and the output end of the second dual-switch driving unit is connected to the second pyrotechnic bus. Among them, the airborne control unit performs: in response to a loop resistance measurement trigger signal, acquires the target voltage output by the operational amplifier; based on the virtual short and virtual open characteristics of the operational amplifier, calculates the actual load loop resistance corresponding to all the opened pyrotechnic output circuits according to the current provided by the constant current source, the target voltage, the eleventh resistor, and the twelfth resistor; determines the actual ignition current according to the actual load loop resistance and the target voltage; adjusts the output of the DC-DC converter according to the actual ignition current, so that the output of the DC-DC converter can realize the ignition of the pyrotechnic devices connected to all the opened pyrotechnic output circuits.

[0015] A power supply system for a drone provided by an embodiment of the present application. The power supply system includes a power integration module, a control module, multiple input power supplies, and a power input control module corresponding to each input power supply. Each input power supply is connected to the power integration module through its corresponding power input control module. The power input control module is also connected to the control module. The power integration module is further connected to multiple power output interfaces respectively. Among them, the control module executes: receiving a power supply switching instruction, where the power supply switching instruction includes a target input power supply and its corresponding target switching state; according to the power supply switching instruction, controlling the power input control module corresponding to the target input power supply to act, so that the target input power supply is switched to the target switching state indicated by the power supply switching instruction. Through the power input control module corresponding to multiple input power supplies, the present application realizes input isolation and mutual power transfer between each input power supply, improving the power supply stability of the drone.

[0016] To make the above objects, features, and advantages of the present application more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0018] Figure 1 Shows a schematic structural diagram of a power supply system for a drone provided by an embodiment of the present application;

[0019] Figure 2 Shows a schematic diagram of the connection method of a part of the input power supply provided by an embodiment of the present application;

[0020] Figure 3 Shows a schematic structural diagram of a power input control module provided by an embodiment of the present application;

[0021] Figure 4 Shows a schematic structural diagram of a power input control module provided by an embodiment of the present application;

[0022] Figure 5 Shows a schematic structural diagram of a pyrotechnic device ignition module provided by an embodiment of the present application;

[0023] Figure 6 Shows a schematic structural diagram of a first dual-switch drive unit provided by an embodiment of the present application;

[0024] Figure 7The figure shows a schematic structural diagram of an ignition circuit driving unit provided by an embodiment of the present application;

[0025] Figure 8 The figure shows a schematic structural diagram of a pyrotechnic circuit resistance acquisition unit provided by an embodiment of the present application. Detailed implementation manners

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It should be understood that the accompanying drawings in the present application are only for the purposes of illustration and description, and are not used to limit the protection scope of the present application. In addition, it should be understood that the schematic drawings are not drawn to actual scale. The flowcharts used in the present application show operations implemented according to some embodiments of the present application. It should be understood that the operations in the flowchart may not be implemented in sequence, and steps without a logical context relationship may be reversed or implemented simultaneously. In addition, those skilled in the art may add one or more other operations to the flowchart or remove one or more operations from the flowchart under the guidance of the content of the present application.

[0027] In addition, the described embodiments are only some embodiments of the present application, rather than all embodiments. The components of the embodiments of the present application usually described and illustrated in the accompanying drawings here may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application to be protected, but only represents the selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the protection scope of the present application.

[0028] In the current development of unmanned aerial vehicles (UAVs), UAVs have characteristics such as small size and low cost. UAVs are often used to perform different flight tasks. Therefore, the requirements for the power supply and distribution of UAVs are the most stringent. The stability of the power supply directly affects whether the UAV can be put into use. The power supply input forms of UAVs in different flight states are different, including ground power supply, on-board battery power supply, and generator power supply. In the case of multi-channel input power supply, currently commonly used UAVs only illustrate that the multi-channel power supply form can be switched using hardware principles. However, in actual use, multiple power supply inputs require software support for free manual switching, and when switching between multiple power supply methods, it is impossible to ensure that other power supply inputs are not affected.

[0029] Based on this, the embodiments of the present application provide a power supply system for a UAV, which realizes input isolation and mutual power transfer between input power supplies through a power input control module corresponding to a multi-channel input power supply, and improves the power supply stability of the UAV, as follows:

[0030] Please refer to Figure 1 , Figure 1 which shows a schematic structural diagram of a power supply system for a drone provided by an embodiment of the present application. As Figure 1 shown, the power supply system provided by the embodiment of the present application includes a power integration module 1, a control module 2, multiple input power supplies, a power input control module 3 corresponding to each output power supply, multiple power output interfaces 4, and a pyrotechnic device ignition module 5.

[0031] In a preferred embodiment set, each input power supply is connected to the power integration module 1 through its corresponding power input control module 3, and the power input control module 3 is also connected to the control module 2.

[0032] The power integration module 1 is also respectively connected to multiple power output interfaces 4, and the pyrotechnic device ignition module 5 is respectively connected to the power integration module 1, the control module 2, and multiple pyrotechnic output circuits.

[0033] In a preferred embodiment, the control module executes:

[0034] Receiving a power supply switching instruction, the power supply switching instruction includes a target input power supply and its corresponding target switching state. According to the power supply switching instruction, controlling the operation of the power input control module corresponding to the target input power supply to switch the target input power supply to the target switching state.

[0035] In the present application, multiple different input power supplies are provided to supply power to the drone. Each input power supply is connected to the power integration module through its corresponding power input control module 3, which can achieve power supply isolation and independent control between different input power supplies, and can freely select a certain input power supply as the input of the power integration module 1, ensuring that there is no mutual interference between multiple input power supplies, realizing isolation between each input power supply, and improving the circuit stability.

[0036] In a specific embodiment, the input power supply is an on-board battery integrated inside the drone. The power integration module 1 combines multiple input power supplies connected to the power integration module 1 to achieve rectification and filtering of different types of power supplies connected to the drone. At the same time, the power integration module distributes the connected input power supplies to multiple power output interfaces 4.

[0037] In a preferred embodiment, please refer to Figure 2 , Figure 2 which shows a schematic diagram of the connection method of a part of the input power supply provided by the embodiment of the present application. As Figure 2 shown, the input power supply includes a ground power supply input source A and multiple non-ground power supply input sources. Specifically, the multiple non-ground power supply input sources include a generator power supply B1 and an on-board power supply B2, and the ground power supply input source is set on the ground.

[0038] The control module 2 includes a ground control unit 21 corresponding to a ground power supply input source and an airborne control unit 22 corresponding to a non-ground power supply input source. Specifically, the ground control unit is arranged on the ground, and the ground power supply input source A and the ground control unit 21 are connected to the corresponding power input control module 3 on the corresponding unmanned aerial vehicle through an external cable. The airborne control unit 22 is arranged on the unmanned aerial vehicle, and the generator power supply B1 and the airborne power supply B2 are respectively connected to the corresponding power input control module 3, and the airborne control unit 22 is respectively connected to the power input control modules 3 corresponding to the generator power supply B1 and the airborne power supply B2.

[0039] Preferably, the power supply switching instruction includes a first power supply switching instruction and a second power supply switching instruction.

[0040] In a preferred embodiment, the ground control unit executes:

[0041] Receiving a first power supply switching instruction for the ground power supply input source, and according to the first power supply switching instruction, controlling the power input control module corresponding to the ground power supply input source to act, so that the ground power supply input source is switched to the target switching state indicated by the first power supply switching instruction.

[0042] In this application, the switching states corresponding to the input power supply include an access state and a cut-out state.

[0043] For example, if the first power supply switching instruction indicates that the ground power supply input source A is connected to the power integration module 1, after receiving the first power supply switching instruction, the ground control unit controls the power input control module 3 corresponding to the ground power supply input source A to connect the ground power supply input source A to the power integration module 1.

[0044] The airborne control unit executes:

[0045] Receiving a second power supply switching instruction for the target non-ground power supply input source, and according to the second power supply switching instruction, controlling the power input control module corresponding to the target non-ground power supply input source to act, so that the target non-ground power supply input source is switched to the target switching state indicated by the second power supply switching instruction.

[0046] For example, if the second power supply switching instruction indicates that the airborne power supply B2 is connected to the power integration module 1, after receiving the first power supply switching instruction, the airborne control unit controls the power input control module 3 corresponding to the airborne power supply B2 to connect the airborne power supply B2 to the power integration module 1.

[0047] In this application, the power integration module can realize the combination of the input generator power supply B1, airborne power supply B2 and ground power supply input source A.

[0048] The on-board control unit 22 provided in this application is used to control the functions of the entire unmanned aerial vehicle (UAV) device and is the core control part of the UAV device. In a specific example, the domestic HC32F4A0 is selected as the core CPU processor for the on-board control unit 22, which provides a communication interface to implement the communication function. It can receive and execute the flight control instructions issued by the flight control computer through the communication interface, and can control the control circuits or control devices related to the power integration module 1, control the short-circuit protection of the ignition module 5 of the pyrotechnic device, and control the acquisition and analysis of the voltage and current of the UAV device.

[0049] In a preferred embodiment, please refer to Figure 3 , Figure 3 which shows one of the structural schematic diagrams of a power input control module provided in the embodiment of this application. As Figure 3 shown, the power input control module 3 includes an input power supply switching unit 31 and a first isolation protection unit 32. Among them, the input end of the input power supply switching unit 31 is connected to the corresponding input power supply, the output end of the input power supply switching unit 31 is connected to the input end of the first isolation protection unit 32, the output end of the first isolation protection unit 32 is connected to the input end of the power integration module 1, and the control end of the input power supply switching unit 31 is connected to the control module 2.

[0050] In a specific embodiment, the control module controls the input power supply switching unit corresponding to the target input power supply to act according to the power supply switching instruction, so that the target input power supply is switched to the target switching state indicated by the power supply switching instruction.

[0051] Specifically, for the power input control module 3 corresponding to the ground power supply input source A, the control end of its corresponding input power supply switching unit 31 is connected to the ground control unit 21. For the power input control module 3 corresponding to the non-ground power supply input source, the control end of its corresponding input power supply switching unit 31 is connected to the on-board control unit 22.

[0052] That is to say, in this application, for the ground power supply input source A, through the control of the input power supply switching unit 31 corresponding to the ground power supply input source A by the ground control unit 21, the access or cut-off of the ground power supply input source A to the power integration module 1 is realized. For the non-ground power supply input source (generator power supply B1 or on-board power supply B2), through the on-board control unit 22 and the input power supply switching unit 31 corresponding to the non-ground power supply input source, the access or cut-off of the non-ground power supply input source to the power integration module 1 is realized. In addition, a first isolation protection unit 32 is connected in series after each input power supply switching unit 31 to achieve isolation. Specifically, the first isolation protection unit 32 is used to replace the Schottky diode. By adding the first isolation protection unit 32, the protection of multiple input power supplies is realized, the reverse current is prevented, and the isolation of each input power supply is achieved.

[0053] In a specific example, it is assumed that the airborne control unit 22 receives a second power supply switching instruction indicating that the airborne power supply B2 is connected to the power integration module 1. In response to this second power supply switching instruction, the airborne control unit 22 controls the input power supply switching unit 31 corresponding to the airborne power supply B2 to act, so that the airborne power supply B2 is connected to the power integration module 1.

[0054] Please refer to Figure 4 , Figure 4 which shows the second structural schematic diagram of a power input control module provided by an embodiment of the present application. As Figure 4 shown, the input power supply switching unit 31 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first control switch Q1, a second control switch Q2, and a solid-state relay K. The first isolation protection unit 32 includes a third control switch Q3 and a diode controller 321.

[0055] In a preferred embodiment, for each power input control module corresponding to an input power supply:

[0056] One end of the first resistor R1 is respectively connected to the input power supply, the first connection end of the first control switch Q1, and the first connection end of the solid-state relay K. The other end of the first resistor R1 is respectively connected to one end of the second resistor R2, the control end of the first control switch Q1, and the second connection end of the solid-state relay K. The second connection end of the first control switch Q1 is respectively connected to the first connection end of the third control switch Q3 and the first connection end IN of the diode controller 321. The other end of the second resistor R2 is connected to the first connection end of the second control switch Q2. The control end of the second control switch Q2 is respectively connected to one end of the third resistor R3 and one end of the fourth resistor R4. The other end of the fourth resistor R4 is connected to the second connection end of the second control switch Q2 and then grounded. The control end of the solid-state relay K and the other end of the third resistor R3 are respectively connected to the control module 2.

[0057] Specifically, when the input power supply is a ground power supply input source, the control end of the solid-state relay K and the other end of the third resistor R3 are respectively connected to the ground control unit 21. When the input power supply is a non-ground power supply input source, the control end of the solid-state relay K and the other end of the third resistor R3 are respectively connected to the ground control unit 22.

[0058] The control end of the third control switch Q3 is connected to the gate terminal GATE of the diode controller 321. The second connection end of the third control switch Q3 is respectively connected to the third connection end OUT of the diode controller 121 and the power integration module 1.

[0059] Specifically, the first control switch Q1 is an N-MOS transistor, the second control switch Q2 is an NPN transistor, the first connection terminal of the first control switch Q1 is the source of the N-MOS transistor, the second connection terminal of the first control switch Q1 is the drain of the N-MOS transistor, the control terminal of the first control switch Q1 is the gate of the N-MOS transistor, the first connection terminal of the second control switch Q2 is the collector of the NPN transistor, the second connection terminal of the second control switch Q2 is the emitter of the NPN transistor, the control terminal of the second control switch Q2 is the base of the NPN transistor, the third control switch Q3 is a P-MOS transistor, the first connection terminal of the third control switch Q3 is the drain of the P-MOS transistor, the second connection terminal of the third control switch Q3 is the source of the P-MOS transistor, and the control terminal of the third control switch Q3 is the gate of the P-MOS transistor.

[0060] In a specific embodiment, as Figure 4 shown, the first resistor R1 is used as the on-resistance of the gate-source terminal of the first control switch Q1, and a solid-state relay K is connected in parallel across the first resistor R1. The conduction and cutoff of the solid-state relay K are controlled by the ground control unit 21 or the airborne control unit 22. The gate of the first control switch Q1 is grounded through the second control switch Q2, and the conduction and cutoff of the second control switch Q2 are controlled by the ground control unit 21 or the airborne control unit 22.

[0061] In a preferred embodiment, the control module executes:

[0062] If the target access state is access, then by controlling the second control switch Q2 corresponding to the target input power supply to conduct and the solid-state relay K to disconnect, the target input power supply is connected to the power integration module 1 through the first control switch Q1 and the first isolation protection unit 32. If the target access state is cut out, then by controlling the second control switch Q2 corresponding to the target input power supply to disconnect and the solid-state relay K to close, the target input power supply is cut out from the power integration module 1.

[0063] In a specific embodiment, taking the process of connecting the airborne power supply B2 to the power integration module 1 as an example, in response to a power switching instruction indicating that the airborne power supply B2 is connected to the power integration module 1, the airborne control unit 22 controls the solid-state relay K to open and the second control switch Q2 to conduct. At this time, the control terminal of the first control switch Q1 is pulled low, the first control switch Q1 conducts, and the airborne power supply B2 is connected to the power integration module 1.

[0064] In another specific embodiment, taking the process of cutting the airborne power supply B2 out of the power integration module 1 as an example, in response to a power switching instruction indicating that the airborne power supply B2 is cut out from the power integration module 1, the airborne control unit 22 controls the solid-state relay K to latch and the second control switch Q2 to turn off. At this time, the first resistor R1 is short-circuited, the first control switch Q1 is turned off, and the airborne power supply B2 is cut out from the power integration module 1.

[0065] In the above embodiments provided by the present application, for the power supply system provided by the present application, a certain input power supply can be freely selected to access the power integration module 1. And to ensure that there is no mutual interference between multiple input power supplies, the first isolation protection power supply is used to isolate each input power supply, thereby realizing circuit protection.

[0066] In another preferred embodiment, for the first isolation protection unit 32, a P-MOS transistor and a diode controller 321 for driving the P-MOS transistor are used to replace the Schottky diode to protect the corresponding input power supply. The diode controller 321 is selected as a positive voltage ideal diode, and the positive voltage ideal diode has the following characteristics:

[0067] The ideal diode has no threshold voltage. Once any positive voltage is applied to the diode, it will immediately conduct current between its junctions, has no internal resistance, so there is no loss, and can conduct current infinitely. In the present application, since the supply voltages provided by multiple input power supplies are different, by connecting the first isolation protection unit 32 in series in the power input control module corresponding to each input power supply, the protection of multiple input power supplies is realized, the reverse current is prevented, the isolation of each input power supply is realized, and the third control switch Q3 has a smaller voltage drop and lower power consumption when conducting forward.

[0068] In another preferred embodiment, as Figure 1 shown, the power supply system further includes a power charging module 7 and a second isolation protection unit 8. One end of the power charging module is connected to the external charging interface of the drone, the other end of the power charging module is connected to the input end of the second isolation protection unit 8, and the output end of the second isolation protection unit 8 is connected to the charge and discharge interface of the on-board battery.

[0069] Among them, the structure of the second isolation protection unit 8 is the same as that of the first isolation protection unit 321, and will not be elaborated here.

[0070] In a specific embodiment, in most cases, the on-board battery is an essential power supply method for the drone device. However, the on-board battery is integrated inside the drone, and the battery needs to be charged after the drone is used or after the on-board battery is stored for a long time. Most of the on-board batteries of the drone are charged and discharged with lithium batteries. The self-discharge rate of lithium batteries is generally 5-10% per month. To ensure the service life of the lithium battery, the battery should also be charged during the storage stage of the battery. However, charging the combat drone after assembly is rather cumbersome, and it is necessary to disassemble it to charge the on-board battery separately, which will undoubtedly waste a lot of time and affect the charging efficiency.

[0071] To save manpower and time, a battery charging module 7 is integrated inside the drone power distributor of this application, and the charging interface corresponding to the battery charging module 7 can be led to the outside of the airframe or the launch box. It is possible to charge the onboard battery through a charger while ensuring large current, small charging voltage loss, and no impact on the battery charging time.

[0072] Specifically, the charging and discharging interface of the onboard battery is the same interface, which can supply power to the drone device and receive charging. At this time, if you want to charge and discharge separately, the two functions need to be physically isolated. Specifically, in this application, a second isolation protection unit is integrated between the battery charging module and the onboard battery. While realizing the circuit conduction, it prevents current backflow, and the forward conduction voltage drop of the P-MOS transistor inside the second isolation protection unit is less than the conduction voltage drop of the Schottky diode. Therefore, using the second isolation protection unit 8 to achieve circuit protection has the characteristics of small voltage loss and low power consumption.

[0073] Please refer to Figure 5 , Figure 5 which shows a schematic structural diagram of a pyrotechnic device ignition module provided by an embodiment of this application. As Figure 5 shown, the pyrotechnic device ignition module 5 includes a DC-DC converter 51 with short-time large current characteristics, a first dual-switch driving unit 52, an ignition circuit driving unit 53 corresponding to each pyrotechnic output circuit, and a pyrotechnic circuit resistance acquisition unit 54.

[0074] In a preferred embodiment, the input end of the DC-DC converter 51 is connected to the power integration module 1, the output end of the DC-DC converter 51 is connected to the input end of the first dual-switch driving unit 52 through the first pyrotechnic bus L1, the driving end of the first dual-switch driving unit 52 is connected to the onboard control unit 22, the output end of the first dual-switch driving unit 52 is respectively connected to the input end of each ignition circuit driving unit 53 through the second pyrotechnic bus L2, the driving end of each ignition circuit driving unit 53 is connected to the onboard control unit 22, the output end of each ignition circuit driving unit 53 is connected to the corresponding pyrotechnic output circuit, and the pyrotechnic circuit resistance acquisition unit 54 is connected to the second pyrotechnic bus L2.

[0075] In a specific embodiment, in the output circuit corresponding to the drone device, in addition to supplying power to general devices, it is also necessary to have the ability to drive large current devices in a short time, such as pyrotechnic devices like igniters. Such pyrotechnic devices require a driving current of 10A or more, and the driving time is sometimes in the ms level. In the existing drone power supply application design, it is impossible to meet the short-time large current demand for pyrotechnic device ignition, and there is no isolation between different pyrotechnic output circuits, and there is an impact of current fluctuation between different pyrotechnic device ignition circuits, reducing the operation safety of pyrotechnic devices and drone devices.

[0076] In a specific embodiment, to ensure the correct and safe process of driving different pyrotechnic devices and prevent misoperation, the present application introduces a pyrotechnic device ignition module 5. The pyrotechnic device ignition module 5 adopts a three - stage switch. For example, Figure 3 as shown, the first - stage switch is a DC - DC converter 51 with the performance of short - time large current, the second - stage switch is a first dual - switch driving unit 52, and the third - stage switch is an ignition circuit driving unit 53.

[0077] Specifically, the first - stage switch adopts a DC - DC converter 51 with the characteristic of short - time large current, which can accurately control the ignition drive of the pyrotechnic device at the ms or even ns level. The output current corresponding to each ignition circuit driving unit 53 can be adjusted according to the requirements of the corresponding pyrotechnic device for current and time. For example, the selected DC - DC converter 51 supports a maximum output current of 10 A, an output voltage of 8 V, and an output time of 50 ms, meeting the output of short - time large current. At the same time, the DC - DC converter 51 with the characteristic of short - time large current can be made smaller in volume when the circuit function is satisfied.

[0078] In a preferred embodiment, the airborne control unit performs:

[0079] Receiving an ignition trigger signal, starting the DC - DC converter 51, the first dual - switch driving unit 52 and the pyrotechnic circuit resistance acquisition unit 53, receiving an ignition drive control instruction, where the ignition drive control instruction includes the target pyrotechnic output circuit that needs to be ignited, and starting the ignition circuit driving unit corresponding to the target pyrotechnic output circuit to ignite the pyrotechnic device connected thereto through the target pyrotechnic output circuit.

[0080] Please refer to Figure 6 , Figure 6 which shows a schematic structural diagram of a first dual - switch driving unit provided by an embodiment of the present application. As Figure 6 shown, the first dual - switch driving unit 52 includes a first dual - switch driving component, a first gate driving chip IC1, a fifth resistor R5 and a sixth resistor R6. The first dual - switch driving component includes a fourth control switch Q4 and a fifth control switch Q5.

[0081] In a preferred embodiment, the first connection end of the fourth control switch Q4 is connected to the output end of the DC-DC converter 51, the first connection end of the fifth control switch Q5 is respectively connected to the input ends of each ignition circuit driving unit 53, the second connection end of the fourth control switch Q4 is respectively connected to the second connection end of the fifth control switch Q5 and the power ground terminal VS of the first gate driving chip IC1, the driving terminal HO of the first gate driving chip IC1 is respectively connected to one end of the fifth resistor R5 and one end of the sixth resistor R6, the other end of the fifth resistor R5 is connected to the control end of the fourth control switch Q4, the other end of the sixth resistor R6 is connected to the control end of the fifth control switch Q5, and the input terminal IN of the first gate driving chip IC1 is connected to the airborne control unit 22.

[0082] Specifically, both the fourth control switch Q4 and the fifth control switch Q5 are N-MOS transistors. The first connection end of the fourth control switch Q4 is the drain of the N-MOS transistor, the second connection end of the fourth control switch Q4 is the source of the N-MOS transistor, the control end of the fourth control switch Q4 is the gate of the N-MOS transistor, the first connection end of the fifth control switch Q5 is the drain of the N-MOS transistor, the second connection end of the fifth control switch Q5 is the source of the N-MOS transistor, and the control end of the fifth control switch Q5 is the gate of the N-MOS transistor.

[0083] In a specific embodiment, the second-stage switch is implemented by connecting two N-MOS transistors in series and a gate driving chip IC1. The functions of the two N-MOS transistors are as follows: the fourth control switch Q4 serves as a conduction switch, and the fifth control switch Q5 prevents reverse connection of the circuit to protect the front-stage circuit. The body diode reverse cut-off characteristic of the MOS is utilized for reverse connection prevention. The fourth control switch Q4 and the fifth control switch Q5 are of the same model, and MOS transistors with large current and small on-resistance are selected to improve the load-carrying capacity of the system.

[0084] In a preferred embodiment, the airborne control unit performs:

[0085] In response to the ignition trigger signal, the first dual-switch driving component is turned on through the first gate driving chip IC1, so that the voltage signal output by the DC-DC converter 51 is respectively input into each ignition circuit driving unit 53 and the pyrotechnic circuit resistance acquisition unit 54.

[0086] Specifically, in response to the ignition trigger signal, the airborne control unit starts the first gate driving chip IC1. The first gate driving chip IC1 controls the fourth control switch Q4 to conduct, so that the voltage signal output by the DC-DC converter 51 is output to each ignition circuit driving unit 53 and the pyrotechnic circuit resistance acquisition unit 54 through the fourth control switch Q4 and the internal diode of the fifth control switch Q5.

[0087] The third - level switch is multiple ignition circuit driving units 53 that are connected in parallel to output multiple pyrotechnic output circuits. The number of ignition circuit driving units 53 can be appropriately increased or decreased according to actual requirements to achieve the function of multiple - path ignition.

[0088] Please refer to Figure 7 , Figure 7 which shows a schematic structural diagram of an ignition circuit driving unit provided by an embodiment of the present application. As Figure 7 shown, the ignition circuit driving unit 53 includes a sixth control switch Q6, a seventh resistor R7, a second gate - driving chip IC2, and a short - circuit protection circuit 531.

[0089] In a preferred embodiment, the first connection end of the sixth control switch Q6 is connected to the first connection end of the fifth control switch Q5. The second connection end of the sixth control switch Q6 is respectively connected to the short - circuit protection circuit 531, the power - ground terminal VS of the second gate - driving chip IC2, and the corresponding pyrotechnic output circuit. The control end of the sixth control switch Q6 is connected to one end of the seventh resistor R7, the other end of the seventh resistor R7 is connected to the driving end HO of the second gate - driving chip IC2, and the input end IN of the second gate - driving chip IC2 is connected to the airborne control unit 22.

[0090] Specifically, the sixth control switch Q6 can be an N - MOS transistor. The first connection end of the sixth control switch Q6 is the drain of the N - MOS transistor, the second connection end of the sixth control switch Q6 is the source of the N - MOS transistor, and the control end of the sixth control switch Q6 is the gate of the N - MOS transistor.

[0091] In the present application, for each ignition circuit driving unit 53, a single - path N - channel MOSFET and a gate - driving IC are used to achieve the conduction and cut - off of the pyrotechnic output circuit, and a short - circuit protection circuit 531 is connected in parallel at the end of each pyrotechnic output circuit to protect the load pyrotechnic device from mis - ignition during transportation or storage.

[0092] In a preferred embodiment, the airborne control unit 22 performs:

[0093] In response to the ignition - driving control instruction, the sixth control switch Q6 is turned on through the second gate - driving chip IC2, so that the voltage signal output by the first double - switch driving unit is respectively input into the corresponding ignition circuit driving unit of the target pyrotechnic output circuit to ignite the pyrotechnic device corresponding to the target pyrotechnic output circuit.

[0094] Please refer to Figure 8 , Figure 8 which shows a schematic structural diagram of a pyrotechnic - circuit resistance acquisition unit provided by an embodiment of the present application. As Figure 8As shown, the pyrotechnic circuit resistance acquisition unit 54 includes a constant current source 541, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, an operational amplifier LM, and a second dual-switch driving unit 542.

[0095] In a preferred embodiment, the input terminal IN of the constant current source 541 is connected to the power supply VCC, the output terminal OUT of the constant current source 541 is connected to one end of the eighth resistor R8, the setting terminal SET of the constant current source 61 is connected to one end of the ninth resistor R9. After the other ends of the eighth resistor R8 and the ninth resistor R9 are connected, they are respectively connected to one end of the tenth resistor R10 and the input terminal of the second dual-switch driving unit 542. The other end of the tenth resistor R10 is respectively connected to one end of the shown eleventh resistor R11 and the non-inverting input terminal of the operational amplifier LM. The other end of the eleventh resistor R11 is grounded. The inverting input terminal of the operational amplifier LM is respectively connected to one end of the twelfth resistor R12 and one end of the thirteenth resistor R13. The other end of the twelfth resistor R12 is grounded. The other end of the thirteenth resistor R13 is connected to the output terminal of the operational amplifier LM and the airborne control unit 22. The driving terminal of the second dual-switch driving unit 542 is connected to the airborne control unit 22, and the output terminal of the second dual-switch driving unit 542 is connected to the second pyrotechnic bus L2.

[0096] In this application, the structure and connection manner of the second dual-switch driving unit 542 are the same as those of the first dual-switch driving unit 52, and will not be elaborated here.

[0097] In a preferred embodiment, the airborne control unit also performs:

[0098] In response to the loop resistance measurement trigger signal, collect the target voltage V output by the operational amplifier LM AD , based on the virtual short and virtual open characteristics of the operational amplifier LM, according to the current provided by the constant current source 541, the target voltage V AD , the eleventh resistor R11 and the twelfth resistor R12, calculate the actual load loop resistance R corresponding to all the opened pyrotechnic output loops. According to the actual load loop resistance R and the target voltage V AD , determine the actual ignition current, and adjust the output of the DC-DC converter 51 according to the actual ignition current, so that the output of the DC-DC converter 51 can achieve the ignition of the pyrotechnic devices connected to all the opened pyrotechnic output loops.

[0099] In a specific embodiment, the LT3092ETS8 constant current source chip is used as the constant current source 61 to provide a current of 5 mA. This current is connected to the second pyrotechnic bus L2, that is, connected to the ignition circuit drive unit, through the second dual-switch drive unit 542 composed of dual N-channel MOSFETs. Through the differential amplifier circuit designed by the operational amplifier LM, the voltage value V output by the operational amplifier is obtained. AD , and then the actual load loop resistance R is calculated according to the virtual short and virtual open characteristics of the operational amplifier LM. According to the ratio between the target voltage V AD and the actual load loop resistance R, the actual ignition current is determined. The actual ignition current is compared with the required ignition current corresponding to the pyrotechnic device to be ignited. If the actual ignition current is less than the required ignition current, the DC-DC converter is controlled to increase the output until the actual ignition current meets the required ignition current.

[0100] Among them, the actual load loop resistance R is calculated by the following formula:

[0101] The current I+ corresponding to the positive input terminal of the operational amplifier = the current I- corresponding to the negative input terminal of the operational amplifier ≈ 0.

[0102] The voltage V+ corresponding to the positive input terminal of the operational amplifier = the voltage V- corresponding to the negative input terminal of the operational amplifier = 5 mA × R11, where 5 mA is the output current of the constant current source.

[0103] The current I1 flowing through the thirteenth resistor R13 = V- / R12.

[0104] Then, the resistance value R of the pyrotechnic circuit load = VAD / I1 = (VAD × R12) / (5 mA × R11).

[0105] According to actual use, the resistance values of the twelfth resistor R12 and the eleventh resistor R11 are determined. Substituting them into the above formula, the actual load loop resistance R can be obtained. After determining the actual load loop resistance R, the actual ignition current is calculated to determine whether the load pyrotechnics can be driven.

[0106] In another preferred embodiment, as Figure 5 shown, the pyrotechnic ignition module 5 provided by the present application further includes a self-checking circuit 55. The self-checking circuit 55 is placed before multiple ignition circuit drive units 53 and is connected to the second pyrotechnic bus L2. The self-checking circuit 55 is used to detect whether the first-stage switch and the second-stage switch are conducting. The self-checking circuit uses a single-channel N-channel MOSFET and a gate drive chip to detect the self-checking resistor, and its conduction and cutoff are controlled by the on-board control unit 22 to achieve detection.

[0107] The ground of the pyrotechnic device ignition module 5 is isolated from the ground of the power integration module 1 to ensure that there is no current fluctuation between the pyrotechnic device ignition module 5 and the power integration module 2 to avoid damaging other devices.

[0108] The power supply module provided in the present application also includes multiple acquisition circuits (not shown in the figure), and the multiple acquisition circuits include voltage acquisition circuits and current acquisition circuits. Specifically, corresponding voltage acquisition circuits and current acquisition circuits are connected to the input of the multi-channel input terminal, the output of the power integration module 1, and the first-stage switch and the second-stage switch in the ignition module 5 of the pyrotechnic equipment to realize the acquisition of current and voltage at different acquisition points of the power supply circuit. The voltage acquisition circuit and the current acquisition circuit transmit the collected values ​​to the airborne control unit for data analysis.

[0109] For the voltage acquisition circuit: the power supply system provided in this application only collects DC voltage. The voltage to be collected is divided and then passed through a voltage follower, and input to the onboard control unit. The collected value is then compensated through software design, so that the output voltage value can be close to the actual voltage value.

[0110] For the current acquisition circuit: a small resistance in the range of 0.001-0.1Ω is connected in series in the loop where the current needs to be detected, and a current detection amplifier is connected in parallel on both sides of the resistor to convert the weak current signal into a standard analog signal, which is input to the onboard control unit to achieve accurate monitoring of the measured loop current.

[0111] The power supply system provided in the present application also includes a communication module, which communicates with the flight control computer of the UAV, receives commands to the airborne control unit, and the airborne control unit executes the commands issued and transmits back the collected information to interact with the flight control computer. The power supply system uses a full-duplex RS422 communication method for interaction. If other communication interfaces are required, such as RS232 communication interface, CAN bus, etc., they can also be supported.

[0112] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the systems and devices described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein. In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there can be other division methods in actual implementation. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some communication interfaces. The indirect coupling or communication connection of the devices or units can be in electrical, mechanical, or other forms.

[0113] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0114] In addition, in each embodiment of the present application, the functional units can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit.

[0115] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs that can store program codes.

[0116] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application and should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A power supply system for an unmanned aerial vehicle, characterized in that: The power supply system includes a power integration module, a control module, multiple input power supplies, and a power input control module corresponding to each input power supply. Each input power supply is connected to the power integration module through its corresponding power input control module. The power input control module is also connected to the control module. The power integration module is also connected to multiple power output interfaces. Wherein, the control module executes: receiving a power switching instruction, wherein the power switching instruction includes a target input power source and a corresponding target switching state; According to the power switching instruction, a power input control module corresponding to the target input power is controlled to operate so that the target input power is switched to a target switching state indicated by the power switching instruction.

2. The power supply system according to claim 1, characterized in that: The input power source includes a ground power input source and multiple non-ground power input sources, the control module includes a ground control unit corresponding to the ground power input source and an airborne control unit corresponding to the non-ground power input source, and the power switching instruction includes a first power switching instruction and a second power switching instruction. Wherein, the ground control unit executes: receiving a first power switching instruction for a ground power input source; According to the first power switching instruction, controlling the power input control module corresponding to the ground power input source to operate so that the ground power input source switches to the target switching state indicated by the first power switching instruction; The onboard control unit performs: receiving a second power switching instruction for a target non-ground power input source; According to the second power switching instruction, the power input control module corresponding to the target non-ground power input source is controlled to operate so that the target non-ground power input source is switched to the target switching state indicated by the second power switching instruction.

3. The power supply system according to claim 1, characterized in that: The power input control module includes an input power switching unit and a first isolation protection unit. For each power input control module: The input end of the input power switching unit is connected to the corresponding input power, the output end of the input power switching unit is connected to the input end of the first isolation protection unit, the output end of the first isolation protection unit is connected to the input end of the power integration module, and the control end of the input power switching unit is connected to the control module; The control module controls the input power switching unit corresponding to the target input power to operate according to the power switching instruction, so that the target input power is switched to the target switching state indicated by the power switching instruction.

4. The power supply system according to claim 3, characterized in that: The input power switching unit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first control switch, a second control switch and a solid-state relay, one end of the first resistor is respectively connected to the corresponding input power supply, the first connection end of the first control switch and the first connection end of the solid-state relay, the other end of the first resistor is respectively connected to one end of the second resistor, the control end of the first control switch and the second connection end of the solid-state relay, and the second connection end of the first control switch is connected to the input end of the first isolation protection unit; The other end of the second resistor is connected to the first connection end of the second control switch, the control end of the second control switch is respectively connected to one end of the third resistor and one end of the fourth resistor, the other end of the fourth resistor is connected to the second connection end of the second control switch and then grounded, and the control end of the solid-state relay and the other end of the third resistor are respectively connected to the control module; Wherein, the control module executes: If the target access state is access, the target input power is connected to the power integration module through the first control switch and the first isolation protection unit by controlling the second control switch corresponding to the target input power to be turned on and the solid-state relay to be turned off; If the target access state is cut-off, the target input power is cut off from the power integration module by controlling the second control switch corresponding to the target input power to be opened and the solid-state relay to be closed.

5. The power supply system according to claim 3, characterized in that: The first isolation protection unit includes a third control switch and a diode controller. Among them, the first connection end of the third control switch is respectively connected to the second connection end of the first control switch in the input power switching unit and the input end of the diode controller, the control end of the third control switch is connected to the gate end of the diode controller, and the second connection end of the third control switch is respectively connected to the output end of the diode controller and the power integration module.

6. The power supply system according to claim 2, characterized in that: The power supply system further includes a power charging module and a second isolation protection unit, and the multiple non-ground power input sources include an onboard battery. The charger is connected to one end of the power charging module through the external charging interface of the drone, the other end of the power charging module is connected to the input end of the second isolation protection unit, and the output end of the second isolation protection unit is connected to the charging and discharging interface of the onboard battery.

7. The power supply system according to claim 2, characterized in that: The power supply system also includes a DC-DC converter, a first dual switch driving unit, an ignition circuit driving unit corresponding to each pyrotechnic output circuit, and a pyrotechnic circuit resistance value acquisition unit. Wherein, the input end of the DC-DC converter is connected to the power integration module, the output end of the DC-DC converter is connected to the input end of the first dual-switch drive unit through a first pyrotechnic bus, the drive end of the first dual-switch drive unit is connected to an airborne control unit, the output end of the first dual-switch drive unit is respectively connected to the input end of each ignition circuit drive unit through a second pyrotechnic bus, the drive end of each ignition circuit drive unit is connected to the airborne control unit, the output end of each ignition circuit drive unit is connected to a corresponding pyrotechnic output circuit, and the pyrotechnic circuit resistance acquisition unit is connected to the second pyrotechnic bus; Wherein, the onboard control unit performs: Receiving an ignition trigger signal, starting a DC-DC converter, a first dual switch driving unit and a pyrotechnic circuit resistance value acquisition unit; receiving an ignition drive control instruction, wherein the ignition drive control instruction includes a target pyrotechnic output circuit that needs to be ignited; The ignition circuit driving unit corresponding to the target pyrotechnic output circuit is started to ignite the pyrotechnic equipment connected thereto through the target pyrotechnic output circuit.

8. The power supply system according to claim 7, characterized in that: The first dual-switch driving unit includes a first dual-switch driving component, a first gate driving chip, a fifth resistor and a sixth resistor, and the first dual-switch driving component includes a fourth control switch and a fifth control switch. Wherein, the first connection end of the fourth control switch is connected to the output end of the DC-DC converter, the first connection end of the fifth control switch is respectively connected to the input end of each ignition circuit drive unit, the second connection end of the fourth control switch is respectively connected to the second connection end of the fifth control switch and the power ground end of the first gate drive chip, the driving end of the first gate drive chip is respectively connected to one end of the fifth resistor and one end of the sixth resistor, the other end of the fifth resistor is connected to the control end of the fourth control switch, the other end of the sixth resistor is connected to the control end of the fifth control switch, and the input end of the first gate drive chip is connected to the onboard control unit; The onboard control unit performs: In response to the ignition trigger signal, the first dual-switch driving component is turned on through the first gate driving chip, so that the voltage signal output by the DC-DC converter is respectively input into each ignition circuit driving unit and the pyrotechnic circuit resistance value acquisition unit.

9. The power supply system according to claim 7, characterized in that: The ignition circuit driving unit includes a sixth control switch, a seventh resistor, a second gate driving chip and a short circuit protection circuit. Among them, the first connection end of the sixth control switch is connected to the output end of the first dual switch driving unit, the output end of the sixth control switch is respectively connected to the short-circuit protection circuit, the power grounding end of the second gate driving chip and the corresponding pyrotechnic output loop, the control end of the sixth control switch is connected to one end of the seventh resistor, the other end of the seventh resistor is connected to the driving end of the second gate driving chip, and the input end of the second gate driving chip is connected to the airborne control unit; Wherein, the onboard control unit performs: In response to the ignition drive control instruction, the sixth control switch is turned on through the second gate drive chip, so that the voltage signal output by the first dual switch drive unit is respectively input into the ignition circuit drive unit corresponding to the target pyrotechnic output circuit to ignite the pyrotechnic equipment corresponding to the target pyrotechnic output circuit.

10. The power supply system according to claim 7, characterized in that: The pyrotechnic circuit resistance value acquisition unit includes a constant current source, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, an operational amplifier and a second dual switch driving unit. Among them, the input end of the constant current source is connected to the power supply, the output end of the constant current source is connected to one end of the eighth resistor, the setting end of the constant current source is connected to one end of the ninth resistor, the other end of the eighth resistor and the other end of the ninth resistor are connected, and then respectively connected to one end of the tenth resistor and the input end of the second dual switch driving unit, the other end of the tenth resistor is respectively connected to one end of the eleventh resistor and the in-phase input end of the operational amplifier, the other end of the eleventh resistor is grounded, the inverting input end of the operational amplifier is respectively connected to one end of the twelfth resistor and one end of the thirteenth resistor, the other end of the twelfth resistor is grounded, the other end of the thirteenth resistor is connected to the output end of the operational amplifier and the airborne control unit, the driving end of the second dual switch driving unit is connected to the airborne control unit, and the output end of the second dual switch driving unit is connected to the second pyrotechnic bus; Wherein, the onboard control unit performs: In response to a loop resistance measurement trigger signal, collecting a target voltage output by the operational amplifier; Based on the virtual short and virtual break characteristics of the operational amplifier, the actual load circuit resistance corresponding to all the opened pyrotechnic output circuits is calculated according to the current provided by the constant current source, the target voltage, the eleventh resistor and the twelfth resistor; determining an actual ignition current according to an actual load loop resistance and the target voltage; The output of the DC-DC converter is adjusted according to the actual ignition current, so that the output of the DC-DC converter can realize the ignition of the pyrotechnic equipment connected to all the opened pyrotechnic output circuits.

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