External lighting control device for unmanned aerial vehicle

Abstract

The utility model discloses an external lighting control device for an unmanned aerial vehicle, which comprises a surge suppression module, a power supply switching module, a filtering module, a single chip microcomputer, a signal acquisition circuit, a plurality of DC-DC modules and a plurality of driving circuits, wherein the surge suppression module, the power supply switching module and the filtering module are connected in sequence; the signal acquisition circuit is connected to the single chip microcomputer, a normal working power supply and a traction lighting working power supply on the unmanned aerial vehicle are respectively connected to the surge suppression module, surge voltage is absorbed by the surge suppression module, a power supply is switched by the power supply switching module, and one path of power supply directly supplies power to an undercarriage signal lamp through a corresponding driving circuit after the power supply passes through the filtering module; and the other path of power supply is converted into different power supply voltages through the DC-DC modules, and then supplies power to the anti-collision lamp and the navigation lamp through the corresponding driving circuits. According to the technical scheme of the utility model, control functions of all lighting lamps outside the unmanned aerial vehicle are integrated, the occupied area of the unmanned aerial vehicle is reduced, the weight is light, the maintenance is simple, the reliability is high, and the fault isolation function is realized.

Description

Technical Field

[0001] The utility model relates to but is not limited to the technical field of unmanned aerial vehicle lighting, and in particular to an external lighting control device for unmanned aerial vehicle. Background Art

[0002] The external lighting system is mainly composed of an onboard power supply, a control box, signal lights, etc. The signal lights are divided into navigation lights, anti-collision lights, landing lights, formation lights and landing gear signal lights.

[0003] The external lighting control boxes on existing drones are all designed separately to be navigation light control boxes, anti-collision light control boxes, landing light control boxes, formation light control boxes, etc. This type of separately designed external lighting control box is not only heavy, occupies a large area of ​​the aircraft, is costly, and inconvenient to control, but also increases the complexity in care and maintenance. Utility Model Content

[0004] Purpose of the utility model: In order to solve the above-mentioned technical problems, the embodiment of the utility model provides an external lighting control device for a UAV, so as to solve the problems that the external lighting control box on the existing aircraft adopts a separate design to form multiple control boxes, resulting in heavy weight, large aircraft area, high cost, inconvenient control, and increased complexity of care and maintenance.

[0005] Technical solution of the utility model: The embodiment of the utility model provides an external lighting control device for a drone, comprising: a surge suppression module, a power switching module and a filter module connected in sequence, as well as a single-chip microcomputer, a signal acquisition circuit, a plurality of DC-DC modules and a plurality of driving circuits for driving each signal light;

[0006] Among them, the normal working power supply and the traction lighting working power supply on the UAV are respectively connected to the surge suppression module of the external lighting control device. After the surge voltage is absorbed by the surge suppression module, the power supply of the device is switched by the power switching module. After the power is filtered by the filter module, one power supply is directly supplied to the landing gear signal light through the corresponding drive circuit; the other power supply is converted into different power supply voltages by each DC-DC module, and then supplied to the anti-collision light and the navigation light through the corresponding drive circuit.

[0007] The signal acquisition circuit is connected to the single-chip microcomputer. The signal acquisition circuit is used to output a level signal to the single-chip microcomputer by collecting the status signal of the signal light, the valid ground signal, and the landing gear lowering signal or the light detection signal, and the single-chip microcomputer outputs a driving signal to each signal light through the corresponding driving circuit.

[0008] Optionally, in the above-mentioned external lighting control device for a drone,

[0009] The power switching module is used to perform interlocking of the normal working power supply and the traction lighting working power supply. When the UAV has a normal working power supply input, the power switching module cuts off the power supply circuit of the traction lighting working power supply.

[0010] Optionally, in the above-mentioned external lighting control device for a UAV, the driving circuit includes: a landing gear signal light driving circuit, an anti-collision light driving circuit, a navigation light dark driving circuit and a navigation light bright driving circuit; the DC-DC module includes: DC-DC module 1, DC-DC module 2, DC-DC module 3 and DC-DC module 4;

[0011] The output ends of the filtering module are respectively connected to DC-DC module 1, DC-DC module 2, DC-DC module 3, DC-DC module 4 and the landing gear signal light driving circuit, DC-DC module 1 is connected to the single-chip microcomputer, and the single-chip microcomputer is respectively connected to each driving circuit; DC-DC module 2 is connected to the navigation light through the navigation light bright driving circuit, DC-DC module 3 is connected to the navigation light through the navigation light dark driving circuit, DC-DC module 4 is connected to the anti-collision light through the anti-collision light driving circuit, and the landing gear signal light driving circuit is connected to the landing gear signal light.

[0012] Optionally, in the above-mentioned external lighting control device for a drone,

[0013] The external lighting control device is used to collect the on-off signal, steady flash signal, and bright and dark signal of the navigation light through the signal collection circuit. If the ground signal is valid, the low level is output to the single-chip microcomputer, and the single-chip microcomputer outputs different combination mode signals, which are then driven by the navigation light dark driving circuit and the navigation light bright driving circuit;

[0014] The external lighting control device is also used to collect the on-off signal of the anti-collision lamp through the signal collection circuit. If the ground signal is valid, a low-level signal is output to the single-chip microcomputer, and the single-chip microcomputer outputs a waveform signal, which is then driven by the anti-collision lamp driving circuit;

[0015] The external lighting control device is also used for collecting the landing gear lowering signal or the light detection signal through the signal collection circuit. If the ground signal is valid, a low-level signal is output to the single-chip microcomputer, and the single-chip microcomputer outputs a high-level signal, which is then driven by the landing gear signal light driving circuit; when the wheel load signal is collected and the ground signal is valid, the single-chip microcomputer outputs a low-level signal, and the power supply of the landing gear signal light is cut off through the landing gear signal light driving circuit.

[0016] Optionally, in the above-mentioned external lighting control device for a drone, the signal acquisition circuit includes: an optical coupler U1, a resistor, a capacitor and a diode D1;

[0017] Among them, the on-board DC power supply is connected to the two input terminals of the optocoupler U1 through resistor R1, and the discrete input signal is connected to the two input terminals of the optocoupler U1 through diode D1. The capacitor C1 and the resistor R2 are connected in parallel between the two input terminals of the optocoupler U1. One output terminal of the optocoupler U1 is grounded, and the other output terminal is connected to the pull-up power supply through resistor R3 and output to the microcontroller.

[0018] Optionally, in the above-mentioned external lighting control device for a drone, the driving circuit includes: an optical coupler U2, a resistor, a PMOS tube Q1 and a diode D2, and a self-recovery fuse F1;

[0019] Among them, the discrete input signal is connected to an input end of the optocoupler U2, the other input end of the optocoupler U2 is grounded through a resistor R7, an output end of the optocoupler U2 is grounded through a resistor R4, the other output end of the optocoupler U2 is connected in parallel with a voltage-dividing resistor R5 and a voltage-dividing resistor R6, the voltage-dividing resistor R6 is connected to the gate of the PMOS tube Q1, the source of the PMOS tube Q1 and the voltage-dividing resistor R5 are connected in parallel to the power supply voltage, and the drain of the PMOS tube Q1 is connected to the output end via a diode D2 and a self-recovery fuse F1.

[0020] Optionally, in the above-mentioned external lighting control device for a drone, the power switching module includes: a relay K1, a diode D3 and a diode D4;

[0021] Among them, the normal working power supply is connected to the diode D3 and one end of the relay K1 respectively, the other end of the relay K1 is grounded, the traction lighting working power supply is connected to the diode D4 through a set of contacts in the relay K1, and the 3.3V voltage is connected to the normally closed position of another set of contacts in the relay K1.

[0022] The beneficial effects of the utility model are as follows: the external lighting control device for unmanned aerial vehicles provided by the embodiment of the utility model, by setting the internal circuit structure of the external lighting control device, the connection relationship between each circuit module, and the circuit form of providing power to each signal light, the normal working power supply and the traction lighting working power supply on the unmanned aerial vehicle are respectively connected to the surge suppression module at the input end of the device; after the surge voltage is absorbed by the surge suppression module, the power supply of the device is switched by the power switching module, and the power is filtered by the filtering module, and one power supply is directly supplied to the landing gear signal light through the corresponding drive circuit; the other power supply is converted into different power supply voltages by each DC-DC module, and then supplied to the anti-collision light and the navigation light through the corresponding drive circuit; in the specific implementation, the signal acquisition circuit collects the status signal of each signal light, the ground signal is valid, and the landing gear is lowered into place signal or the light detection signal, and outputs the level signal to the single-chip microcomputer, and the single-chip microcomputer outputs the drive signal to each signal light through the corresponding drive circuit. The external lighting control device provided by the embodiment of the utility model integrates the control functions of all external lighting lamps of the unmanned aerial vehicle, reduces the area occupied by the aircraft, is light in weight, simple in maintenance, highly reliable, and has a fault isolation function, so that the control failure of one lamp will not affect the control functions of other lamps. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the technical solution of the utility model and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the utility model and do not constitute a limitation on the technical solution of the utility model.

[0024] Figure 1 A schematic diagram of the structure of an external lighting control device for a drone provided by an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of the structure of a signal acquisition circuit in an external lighting control device provided by an embodiment of the utility model;

[0026] Figure 3 A schematic diagram of the structure of a driving circuit in an external lighting control device provided by an embodiment of the utility model;

[0027] Figure 4 The present invention is a schematic diagram of the circuit structure of a power switching module in an external lighting control device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the embodiments of the utility model will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0029] As described in the above background technology, the external lighting control box on the existing UAV adopts a separate design structure, which is not only heavy, occupies a large area of ​​the aircraft, is costly, and inconvenient to control, but also increases the complexity in care and maintenance.

[0030] In view of the above problems, there is an urgent need to design a new type of external lighting control device for UAVs that can adapt to the all-weather flight mission requirements of UAVs, integrate the control functions of all external lighting lamps, reduce the area occupied by the aircraft, and enable ground maintenance personnel to simply replace the product while reducing the weight of the product as much as possible. It also has a fault isolation function to ensure that the control failure of one lamp does not affect the control of other lamps.

[0031] The utility model provides the following specific embodiments which can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0032] Figure 1 The following is a schematic diagram of the structure of an external lighting control device for a drone provided by an embodiment of the utility model. Figure 1 As shown, the external lighting control device for a drone provided by an embodiment of the utility model includes: a surge suppression module, a power switching module, and a filtering module connected in sequence. The external lighting control device also includes: a single-chip microcomputer, a signal acquisition circuit, and multiple DC-DC modules and multiple driving circuits for driving each signal light.

[0033] The connection relationship between the circuits and modules in the external lighting control device provided by the embodiment of the utility model is as follows: the normal working power supply and the traction lighting working power supply on the UAV are respectively connected to the surge suppression module of the external lighting control device. After the surge voltage is absorbed by the surge suppression module, the power supply of the device is switched by the power switching module, and the power is filtered by the filtering module. One power supply is directly used to supply power to the landing gear signal light through the corresponding drive circuit; the other power supply is converted into different power supply voltages by each DC-DC module, and then supplied to the anti-collision light and the navigation light through the corresponding drive circuit.

[0034] The signal acquisition circuit in the embodiment of the utility model is connected to the single-chip microcomputer. The signal acquisition circuit collects various status signals of the signal lights (for example, including on-off signals, steady flashing signals, bright and dark signal lights), valid ground signals, and landing gear lowered signals or light detection signals, and outputs high / low levels to the single-chip microcomputer, and the single-chip microcomputer outputs corresponding drive signals to each signal light.

[0035] The power switching module in the embodiment of the utility model is used to achieve the interlocking of the normal working power supply and the traction lighting working power supply. When the normal working power supply is input on the UAV, the power switching module cuts off the power supply circuit of the traction lighting working power supply.

[0036] In actual application of the embodiments of the utility model, the signal lights based on the UAV include: landing gear signal lights, anti-collision lights and navigation lights; accordingly, the driving circuit may include: landing gear signal light driving circuit, anti-collision light driving circuit, navigation light dark driving circuit and navigation light bright driving circuit; the DC-DC module includes: DC-DC module 1, DC-DC module 2, DC-DC module 3 and DC-DC module 4.

[0037] like Figure 1 As shown, the output end of the filter module is respectively connected to DC-DC module 1, DC-DC module 2, DC-DC module 3, DC-DC module 4 and the landing gear signal light drive circuit, DC-DC module 1 is connected to the single-chip microcomputer, and the single-chip microcomputer is respectively connected to each drive circuit; DC-DC module 2 is connected to the navigation light through the navigation light bright drive circuit, DC-DC module 3 is connected to the navigation light through the navigation light dark drive circuit, DC-DC module 4 is connected to the anti-collision light through the anti-collision light drive circuit, and the landing gear signal light drive circuit is connected to the landing gear signal light.

[0038] The working principle of the external lighting control device for a drone provided by an embodiment of the utility model is described below.

[0039] (1) The device uses the DC power supply on the drone as the working power supply

[0040] The DC power supply on the drone is input to the external lighting control device, and the surge voltage is first absorbed by the surge suppression module. The power switching module realizes the interlocking of the normal working power supply and the traction lighting working power supply. When there is a normal working power input on the aircraft, the power switching module cuts off the power supply circuit of the traction lighting working power supply, and then the power is filtered by the filter module. After filtering, part of the power is directly used to power the landing gear signal light, and the other part of the power is converted into 3.3V through DC-DC module 1 to power the single-chip microcomputer, and converted into 25V and 21.5V respectively through DC-DC module 2 and DC-DC module 3 to realize bright / dark power supply for the combined navigation light, and converted into 26.5V through DC-DC module 4 to power the anti-collision light.

[0041] (2) Combined navigation lights

[0042] The signal output to the combined navigation light is: the on-off signal, steady flashing signal, bright and dark signal of the navigation light are collected through the signal acquisition module. If the ground signal is valid, the output low level is provided to the microcontroller, and the microcontroller outputs different combination mode signals.

[0043] For example, when the combined navigation light works in the flashing mode, the single-chip microcomputer outputs a square wave signal with a period of 0.71S and a duty cycle of 71%. After the navigation light dark drive circuit and the navigation light bright drive circuit, the combined navigation light flashes at a certain frequency.

[0044] (2) Anti-collision lights

[0045] The signal output to the anti-collision light is: the on-off signal of the anti-collision light is collected by the signal acquisition circuit. If the ground signal is valid, a low-level signal is output to the microcontroller. The microcontroller outputs a waveform signal with a flashing frequency of 60±10 times / minute, which is then driven by the anti-collision light drive circuit.

[0046] (4) Landing gear signal light

[0047] The signal output to the landing gear signal light is: when the signal acquisition circuit collects the landing gear lowered signal or the light detection signal, and the ground signal is valid, the low-level signal is output to the single-chip microcomputer, and the single-chip microcomputer outputs a high-level signal, and the landing gear signal light driving circuit provides power for the landing gear lowered signal light. When the wheel load signal is collected and the ground signal is valid, the single-chip microcomputer outputs a low-level signal, and the landing gear signal light driving circuit cuts off the power supply of the landing gear signal light.

[0048] The external lighting control device for unmanned aerial vehicles provided by the embodiment of the utility model, by setting the internal circuit structure of the external lighting control device, the connection relationship between each circuit module, and the circuit form of providing power to each signal light, the normal working power supply and the traction lighting working power supply on the unmanned aerial vehicle are respectively connected to the surge suppression module at the input end of the device, after the surge voltage is absorbed by the surge suppression module, the power supply of the device is switched by the power switching module, and the power is filtered by the filtering module, and one power supply is directly supplied to the landing gear signal light through the corresponding drive circuit; the other power supply is converted into different power supply voltages by each DC-DC module, and then supplied to the anti-collision light and the navigation light respectively through the corresponding drive circuit; in the specific implementation, the signal acquisition circuit collects the status signal of each signal light, the ground signal is valid, and the landing gear is lowered in place signal or the light detection signal, and outputs the level signal to the single-chip microcomputer, and the single-chip microcomputer outputs the drive signal to each signal light through the corresponding drive circuit. The external lighting control device provided by the embodiment of the utility model integrates the control functions of all external lighting lamps of the unmanned aerial vehicle, reduces the area occupied by the aircraft, is light in weight, simple in maintenance, highly reliable, and has a fault isolation function, so that the control failure of one lamp will not affect the control functions of other lamps.

[0049] It should be noted that the embodiment of the utility model aims to provide the circuit structure inside the external lighting control device, the relationship between each circuit and circuit module, and the control logic of the single-chip microcomputer can be set according to actual needs, which is not the protection content of the embodiment of the utility model.

[0050] In one implementation of the present utility model, Figure 2 , which is a schematic diagram of the structure of a signal acquisition circuit in an external lighting control device provided by an embodiment of the utility model.

[0051] The signal acquisition circuit in this implementation is composed of an optocoupler, a resistor, a capacitor, and a diode. Figure 2 As shown, the on-board +28V power supply is connected to the two input terminals of the optocoupler U1 via resistor R1, and the discrete input signal is connected to the two input terminals of the optocoupler U1 via diode D1. The capacitor C1 and the resistor R2 are connected in parallel between the two input terminals of the optocoupler U1. One output terminal of the optocoupler U1 is grounded, and the other output terminal is connected to the 3.3V power supply through resistor R3 and output to the microcontroller.

[0052] The working principle of the above signal acquisition circuit is: when the discrete input signal is a ground signal, the light-emitting diode inside the optocoupler (U1) emits light due to the current passing through it. By utilizing the photoelectric characteristics of the light-emitting diode in the optocoupler (U1), the light emitted by the light-emitting diode shines on the base of the phototransistor to turn on the phototransistor, and the output of the phototransistor is a low level; when the discrete input signal is an open circuit, the light-emitting diode has no current and is cut off, and the phototransistor is also cut off, and the output of the phototransistor is the voltage of the pull-up power supply +3.3V, which is a high level.

[0053] Among them, the R1 resistor plays a current limiting role. In order to improve the anti-interference ability of the circuit, the R2 resistor and the C1 capacitor are connected in parallel to the input end of the optocoupler U1, and a reverse protection diode is added.

[0054] In one implementation of the present utility model, Figure 3 , which is a schematic diagram of the structure of a driving circuit in an external lighting control device provided by an embodiment of the utility model.

[0055] The driving circuit in this implementation is composed of an optocoupler U2, a resistor, a PMOS tube Q1, a diode D2, and a self-recovery fuse F1. The microcontroller drives the PMOS tube Q1 through the optocoupler U2 to achieve voltage output.

[0056] like Figure 3 In the structure of the driving circuit shown, a discrete input signal is connected to an input terminal of an optocoupler U2, another input terminal of the optocoupler U2 is grounded through a resistor R7, an output terminal of the optocoupler U2 is grounded through a resistor R4, another output terminal of the optocoupler U2 is connected in parallel with a voltage-dividing resistor R5 and a voltage-dividing resistor R6, the voltage-dividing resistor R6 is connected to the gate of the PMOS tube Q1, the source of the PMOS tube Q1 and the voltage-dividing resistor R5 are connected in parallel to the power supply voltage, and the drain of the PMOS tube Q1 is connected to the output terminal via a diode D2 and a self-recovery fuse F1.

[0057] The working principle of the above driving circuit is: when the single-chip microcomputer outputs a high level, the optocoupler U2 is turned on, at this time the PMOS tube Q1 is turned on, and the power supply voltage converted by the DC-DC module is output to the load (i.e., each signal light); when the single-chip microcomputer outputs a low level, the optocoupler U2 is turned off, at this time the PMOS tube Q1 is turned off, and there is no voltage output.

[0058] Among them, R5 and R6 are voltage-dividing resistors, R4 is a current-limiting resistor, F1 is a self-recovering fuse to prevent circuit damage caused by a short circuit at the load end, and D2 is an anti-reverse diode.

[0059] In one implementation of the present utility model, Figure 4 , which is a schematic diagram of the circuit structure of the power switching module in the external lighting control device provided by an embodiment of the utility model.

[0060] In this implementation, the normal working power supply and the traction lighting working power supply can be switched through the power switching module.

[0061] like Figure 4 In the structure of the power switching module shown,

[0062] The working principle of the above-mentioned power switching module is as follows: when the normal working power is input on the aircraft, the relay K1 coil is energized, the contacts are closed, and the traction lighting working power circuit is cut off; when only the traction lighting working power is input, the relay K1 does not work, and the traction lighting working power supplies the single-chip microcomputer through the normally closed contacts of relay K1, and the 3.3V high-level signal is assigned to the normally closed position of the second group of contacts of relay K1. When the IO port of the single-chip microcomputer detects a high-level signal in the normally closed position, it is determined that only the traction lighting working power is input, and the single-chip microcomputer controls the navigation lights to work in a steady state, and cuts off the power supply of the anti-collision lights and landing gear signal lights.

[0063] The diode D3 and the diode D4 are Schottky diodes, which have the characteristics of unidirectional conduction and small conduction voltage drop.

[0064] The external lighting control device for a UAV provided in an embodiment of the utility model is used for controlling the circuit of the external lighting system, providing circuit control for ground detection of traction lighting and landing gear lowering signal lights, providing power supply and mode control for combined navigation lights, providing power supply for anti-collision lights, and providing power supply for landing gear lowering signal lights.

[0065] The external lighting control device realizes the following functions:

[0066] 1) Realize circuit control of the external lighting device through signal acquisition circuit, single chip microcomputer and driving circuit;

[0067] 2) The switching and collection of normal working power and traction lighting working power are realized through the power switching module and the single chip microcomputer;

[0068] 3) The single-chip microcomputer collects the combined signals of different modes of the navigation lights, and controls the DC-DC module 2 and the DC-DC module 3 through the corresponding driving circuit to provide bright / dark voltage and mode control for the navigation lights;

[0069] 4) The on-off signal of the anti-collision lamp is collected by the single-chip microcomputer, and the DC-DC module 4 is controlled by the corresponding driving circuit to provide power for the anti-collision lamp;

[0070] 5) The landing gear lowering signal is collected through the single-chip microcomputer, and the corresponding driving circuit is used to provide power for the landing gear signal light.

[0071] Although the implementation methods disclosed in the present invention are as above, the contents are only implementation methods adopted to facilitate the understanding of the present invention, and are not intended to limit the present invention. Any technician in the field to which the present invention belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present invention, but the scope of patent protection of the present invention shall still be based on the scope defined in the attached claims.

Claims

1. An external lighting control device for a drone, characterized in that: include: A surge suppression module, a power switching module and a filtering module connected in sequence, as well as a single-chip microcomputer, a signal acquisition circuit, a plurality of DC-DC modules and a plurality of driving circuits for driving each signal lamp; Among them, the normal working power supply and the traction lighting working power supply on the UAV are respectively connected to the surge suppression module of the external lighting control device. After the surge voltage is absorbed by the surge suppression module, the power supply of the device is switched by the power switching module. After the power is filtered by the filter module, one power supply is directly supplied to the landing gear signal light through the corresponding drive circuit; the other power supply is converted into different power supply voltages by each DC-DC module, and then supplied to the anti-collision light and the navigation light through the corresponding drive circuit. The signal acquisition circuit is connected to the single-chip microcomputer. The signal acquisition circuit is used to output a level signal to the single-chip microcomputer by collecting the status signal of the signal light, the valid ground signal, and the landing gear lowering signal or the light detection signal, and the single-chip microcomputer outputs a driving signal to each signal light through the corresponding driving circuit.

2. The external lighting control device for a drone according to claim 1, characterized in that: The power switching module is used to perform interlocking of the normal working power supply and the traction lighting working power supply. When the UAV has a normal working power supply input, the power switching module cuts off the power supply circuit of the traction lighting working power supply.

3. The external lighting control device for a drone according to claim 1, characterized in that: The driving circuit includes: a landing gear signal light driving circuit, an anti-collision light driving circuit, a navigation light dark driving circuit and a navigation light bright driving circuit; the DC-DC module includes: DC-DC module 1, DC-DC module 2, DC-DC module 3 and DC-DC module 4; The output ends of the filtering module are respectively connected to DC-DC module 1, DC-DC module 2, DC-DC module 3, DC-DC module 4 and the landing gear signal light driving circuit, DC-DC module 1 is connected to the single-chip microcomputer, and the single-chip microcomputer is respectively connected to each driving circuit; DC-DC module 2 is connected to the navigation light through the navigation light bright driving circuit, DC-DC module 3 is connected to the navigation light through the navigation light dark driving circuit, DC-DC module 4 is connected to the anti-collision light through the anti-collision light driving circuit, and the landing gear signal light driving circuit is connected to the landing gear signal light.

4. The external lighting control device for a drone according to claim 3, characterized in that: The external lighting control device is used to collect the on-off signal, steady flash signal, and bright and dark signal of the navigation light through the signal collection circuit. If the ground signal is valid, the low level is output to the single-chip microcomputer, and the single-chip microcomputer outputs different combination mode signals, which are then driven by the navigation light dark driving circuit and the navigation light bright driving circuit; The external lighting control device is also used to collect the on-off signal of the anti-collision lamp through the signal collection circuit. If the ground signal is valid, a low-level signal is output to the single-chip microcomputer, and the single-chip microcomputer outputs a waveform signal, which is then driven by the anti-collision lamp driving circuit; The external lighting control device is also used for collecting the landing gear lowering signal or the light detection signal through the signal collection circuit. If the ground signal is valid, a low-level signal is output to the single-chip microcomputer, and the single-chip microcomputer outputs a high-level signal, which is then driven by the landing gear signal light driving circuit; when the wheel load signal is collected and the ground signal is valid, the single-chip microcomputer outputs a low-level signal, and the power supply of the landing gear signal light is cut off through the landing gear signal light driving circuit.

5. The external lighting control device for a drone according to any one of claims 1 to 4, characterized in that: The signal acquisition circuit includes: an optical coupler U1, a resistor, a capacitor and a diode D1; Among them, the on-board DC power supply is connected to the two input terminals of the optocoupler U1 through resistor R1, and the discrete input signal is connected to the two input terminals of the optocoupler U1 through diode D1. The capacitor C1 and the resistor R2 are connected in parallel between the two input terminals of the optocoupler U1. One output terminal of the optocoupler U1 is grounded, and the other output terminal is connected to the pull-up power supply through resistor R3 and output to the microcontroller.

6. The external lighting control device for a drone according to any one of claims 1 to 4, characterized in that: The driving circuit includes: an optical coupler U2, a resistor, a PMOS tube Q1, a diode D2, and a self-recovery fuse F1; Among them, the discrete input signal is connected to an input end of the optocoupler U2, the other input end of the optocoupler U2 is grounded through a resistor R7, an output end of the optocoupler U2 is grounded through a resistor R4, the other output end of the optocoupler U2 is connected in parallel with a voltage-dividing resistor R5 and a voltage-dividing resistor R6, the voltage-dividing resistor R6 is connected to the gate of the PMOS tube Q1, the source of the PMOS tube Q1 and the voltage-dividing resistor R5 are connected in parallel to the power supply voltage, and the drain of the PMOS tube Q1 is connected to the output end via a diode D2 and a self-recovery fuse F1.

7. The external lighting control device for a drone according to any one of claims 1 to 4, characterized in that: The power switching module includes: a relay K1, a diode D3 and a diode D4; Among them, the normal working power supply is connected to the diode D3 and one end of the relay K1 respectively, the other end of the relay K1 is grounded, the traction lighting working power supply is connected to the diode D4 through a set of contacts in the relay K1, and the 3.3V voltage is connected to the normally closed position of another set of contacts in the relay K1.

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