A light driving control circuit of an unmanned aerial vehicle
By using the lighting drive control circuit of the unmanned aerial vehicle (UAV) to adjust the output power of the LED power module in real time, the problem of the UAV formation light show being affected by external light was solved, resulting in better lighting effects and user experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN HIGHGREAT TECH DEV CO LTD
- Filing Date
- 2025-04-17
- Publication Date
- 2026-06-16
Smart Images
Figure CN224368008U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of unmanned aerial vehicle technology, and in particular to a lighting drive control circuit for an unmanned aerial vehicle. Background Technology
[0002] In recent years, unmanned aerial vehicles (UAVs) have been widely used in various fields, including but not limited to aerial photography, search and rescue, nighttime navigation, security monitoring, and light show performances. In these applications, the UAV's lighting system not only provides the necessary illumination and navigation assistance for the aircraft itself, but also enhances the operational efficiency and visual appeal of the UAVs in various scenarios through flexible and diverse lighting effects.
[0003] Drone formation performances are a type of light show that has emerged in recent years. They consist of drones carrying lights that change shapes in the sky to create light spots and images. However, existing drone formation light shows are greatly affected by external lighting, and the lighting effects do not meet expectations. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a lighting drive control circuit for unmanned aerial vehicles to solve the problem of poor visual effects of existing drone light shows.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a lighting drive control circuit for an unmanned aerial vehicle, which includes a main control module and an LED power supply module, wherein the main control module is electrically connected to the LED power supply module, and the LED power supply module receives signals from the main control module and then adjusts the output power of the LED power supply module in real time.
[0006] Furthermore, in the lighting drive control circuit described in this utility model, the LED power module includes an analog switch chip, a switching transistor, a diode, and an inductor. The analog switch chip is connected to the main control module to receive signals; the analog switch chip is connected to the switching transistor to output signals; and the switching transistor, diode, and inductor form a step-down BUCK circuit.
[0007] Furthermore, in the lighting drive control circuit described in this utility model, the switching transistor is a MOSFET.
[0008] Furthermore, in the lighting drive control circuit described in this utility model, the LED power module also includes a voltage divider resistor, which is arranged in series in the circuit, and the analog switch chip obtains the voltage difference through the voltage divider resistor.
[0009] Furthermore, the lighting drive control circuit described in this utility model also includes a control power supply module, which is electrically connected to the main control module. The control power supply module includes a voltage regulator chip and several filter capacitors, which are connected in parallel to the input and output terminals of the voltage regulator chip.
[0010] Furthermore, the lighting drive control circuit described in this utility model also includes a ferrite bead, which is connected in series at the output terminal of the voltage regulator chip. After noise reduction by the ferrite bead, it supplies power to the main control module.
[0011] Furthermore, the lighting drive control circuit described in this utility model also includes an LED lamp, and the LED power supply module is electrically connected to the LED lamp.
[0012] Furthermore, the lighting drive control circuit described in this utility model also includes a temperature sensing module, which is connected to the control power module, the main control module, and the LED light respectively.
[0013] Furthermore, in the lighting drive control circuit described in this utility model, the temperature sensing module includes a temperature sensing chip and a decoupling capacitor, and the positive terminal of the temperature sensing chip is grounded through the decoupling capacitor.
[0014] Furthermore, the lighting drive control circuit described in this utility model also includes an interface module, which is electrically connected to the control power module, the main control module, and the LED power module respectively.
[0015] The beneficial effects of this invention are as follows: This invention provides a lighting drive control circuit for unmanned aerial vehicles (UAVs), enabling the UAVs to achieve corresponding lighting effects, such as strobe. In this invention, the lighting drive control circuit includes a main control module and an LED power supply module electrically connected to each other. The LED power supply module can adjust its output power in real time based on signals received from the main control module. Specifically, the main control module can output corresponding signals (such as PWM signals). After receiving these signals, the LED power supply module adjusts its output power to the LED lights, thereby enabling the LED lights to achieve lighting effects such as constant illumination and strobe, greatly improving the lighting display effect of the UAVs and enhancing the user's viewing experience. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of one embodiment of the lighting drive control circuit described in this utility model;
[0017] Figure 2 This is a schematic diagram of the interface module in one embodiment of the lighting drive control circuit of the present invention;
[0018] Figure 3 This is a schematic diagram of the LED power supply module in one embodiment of the lighting drive control circuit of this utility model;
[0019] Figure 4 This is a schematic diagram of the control power supply module in one embodiment of the lighting drive control circuit of this utility model;
[0020] Figure 5 This is a schematic diagram of the main control module in the lighting drive control circuit of this utility model in one embodiment;
[0021] Figure 6 This is a schematic diagram of the temperature sensing module in one embodiment of the lighting drive control circuit of this utility model. Detailed Implementation
[0022] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.
[0023] Drone formation light shows are a relatively new form of light performance that utilizes drones carrying lights to create illuminated images by changing shapes in the sky. However, existing drone formation light shows suffer from low brightness and are significantly affected by ambient light. Therefore, a formation lighting solution with strobe effects is needed to further enhance the user's viewing experience.
[0024] Please refer to Figures 1 to 6 This utility model provides a lighting drive control circuit for an unmanned aerial vehicle, which includes a main control module and an LED power supply module. The main control module is electrically connected to the LED power supply module, and the LED power supply module receives signals from the main control module and adjusts the output power of the LED power supply module in real time.
[0025] As described above, the beneficial effects of this invention are as follows: This invention provides a lighting drive control circuit for unmanned aerial vehicles (UAVs), enabling the UAVs to achieve corresponding lighting effects, such as strobe. In this invention, the lighting drive control circuit includes a main control module and an LED power supply module electrically connected to each other. The LED power supply module can adjust its output power in real time based on signals received from the main control module. Specifically, the main control module can output corresponding signals (such as PWM signals). After receiving these signals, the LED power supply module adjusts its output power to the LED lights, thereby enabling the LED lights to achieve lighting effects such as constant illumination and strobe, greatly improving the lighting display effect of the UAVs and enhancing the user's viewing experience.
[0026] In practical applications, if the ambient lighting conditions for an unmanned aerial vehicle (UAV) are not as good as expected, strobe lights can significantly increase its visibility, solving the problem of significant interference from ambient light. For example, if a UAV is conducting nighttime aerial photography missions, its strobe lights can make it easier for the operator to track the UAV's position, while also alerting operators of nearby aircraft, helicopters, and other aircraft to its presence, preventing mid-air collisions in low-light conditions.
[0027] In this solution, the lighting drive control circuit of the aforementioned unmanned aerial vehicle includes multiple modules such as an interface module, an LED power supply module, a control power supply module, a main control module, LED lights, and a temperature sensing module. The following describes these modules in detail with reference to the corresponding diagrams.
[0028] (1) Interface module, such as Figure 2 As shown, the interface module can be one or a combination of Type-C interface, Micro USB interface, and DC interface, and it is coupled to the control power module, main control module, and LED power module through the corresponding interface.
[0029] (2) LED power supply module, which is electrically connected to the main control module and the LED lamp respectively. The LED power supply module may include an analog switch chip U1, a switch transistor Q1, a diode D1, an inductor L1, a voltage divider resistor R3, multiple resistors (such as resistors R1, R2, R4 and R5) and multiple filter capacitors (such as filter capacitors C1, C2, C3, C4 and C5), etc. The following is in conjunction with Figure 3 Let me give you a detailed introduction.
[0030] like Figure 3 As shown, in an optional embodiment, the LED power module includes an analog switch chip U1, a switching transistor Q1, a diode D1, and an inductor L1. The analog switch chip U1 is connected to the main control module to receive control signals; the analog switch chip U1 is also connected to the switching transistor Q1 to output control signals. The switching transistor Q1, diode D1, and inductor L1 form a step-down BUCK circuit. In practical applications, the EN port of the analog switch U1 can be connected to the I / O port on the main control chip U7, thereby enabling electrical connection between the analog switch chip U1 and the main control module.
[0031] In practical applications, the switching transistor Q1 can be a MOSFET. For example... Figure 3As shown, the gate (G) of the switching transistor Q1 is electrically connected to the PGATE port of the analog switch U1, and the source (S) of the switching transistor Q1 is electrically connected to the CSN port of the analog switch U1. The drain (D) of the switching transistor Q1 is connected to ground in series with diode D1, and the drain of the switching transistor Q1 is connected to the cathode of diode D1. One end of the inductor L1 is connected to the positive terminal of the LED, and the other end of the inductor L1 is connected between the drain of the MOSFET and the cathode of diode D1.
[0032] It should be noted that the switching transistor Q1 can be either an NMOS or a PMOS transistor. In a specific embodiment, when a PMOS transistor is used for switching transistor Q1, the PMOS transistor has a low-level conduction characteristic, that is, when the analog switch U1 outputs a low level at the PGATE port, the switching transistor Q1 is turned on. Similarly, when the level is high, the switching transistor Q1 is not turned on.
[0033] As described above, through the electrical connection between the main control module and the analog switch chip U1, the main control module can output corresponding signals (such as PWM signals) to the analog switch U1. Furthermore, by connecting the analog switch U1 to the switching transistor Q1, the analog switch U1 can control the switching of the switching transistor Q1 based on the received signals.
[0034] like Figure 3 As shown, in an optional embodiment, the LED power module further includes a voltage divider resistor R3, which is connected in series in the circuit, and the analog switch chip U1 obtains the voltage difference through the voltage divider resistor R3.
[0035] In practical applications, one end of the voltage divider resistor R3 is electrically connected to the CSP port of the analog switch U1 and the interface module (i.e., VCC_USB on the interface module), and the other end is electrically connected to the CSN port and the source pole of the switching transistor Q1.
[0036] As described above, the voltage divider resistor R3 is connected in series in the circuit so that the analog switch chip U1 can obtain the voltage difference through the voltage divider resistor R3.
[0037] In summary, based on the above configuration, the aforementioned switch Q1, inductor L1, and diode D1 form a buck circuit. During circuit operation, the main control chip U7 outputs a PWM signal. The analog switch U1 receives the PWM signal corresponding to this PWM wave and controls the switching on / off state of switch Q1. Based on this buck circuit, the output power can be flexibly adjusted according to changes in the PWM signal, thereby achieving lighting effects such as constant LED illumination, breathing, or strobe. In other words, using the aforementioned switch Q1 and inductor L1 to form a buck circuit not only provides stable power supply but also allows for flexible adjustment of the output power to achieve various lighting effects such as strobe. Furthermore, the overall components are small in size and lightweight, better meeting the weight reduction requirements of aircraft.
[0038] (3) A control power supply module, which is electrically connected to both the main control module and the temperature sensing module. The control power supply module provides control power to both the main control module and the temperature sensing module to supply them. For example... Figure 4 As shown, the control power supply module includes components such as a voltage regulator chip U2, a ferrite bead FB1, and several filter capacitors (C6-C12). The following description, in conjunction with... Figure 4 The above-mentioned control power module will be described in detail.
[0039] In an optional embodiment, the lighting drive control circuit further includes a control power module, which is electrically connected to the main control module. The control power module includes a voltage regulator chip and several filter capacitors, which are connected in parallel to the input terminal (i.e., IN pin) and the output terminal (i.e., OUT pin) of the voltage regulator chip.
[0040] In practical applications, this control power supply module includes a primary control circuit and a secondary control circuit. The primary control circuit includes a voltage regulator chip and multiple filter capacitors (C6-C9). Filter capacitors C6 and C7 are connected in parallel between the input terminal VCC_USB of the voltage regulator chip U2 and ground to filter out high-frequency noise from the input power supply. Filter capacitors C8 and C9 are connected in parallel between the output terminal VCC_3V3 of the voltage regulator chip U2 and ground to filter out noise from the output of the voltage regulator chip U2. Through the aforementioned voltage regulator chip U2, the input VCC_USB voltage can be converted to VCC_3V3 (i.e., a stable 3.3V voltage). Furthermore, the input terminal of the voltage regulator chip U2 is also coupled to an interface module, such as connecting to the VCC_USB port of the interface module.
[0041] In optional embodiments, such as Figure 4 As shown, the control power module also includes a magnetic bead FB1, which is connected in series at the output terminal of the voltage regulator chip U2. After noise reduction by the magnetic bead, it supplies power to the main control module.
[0042] In practical applications, such as Figure 4 As shown, the secondary control circuit includes a ferrite bead FB1 and multiple filter capacitors (C10-C12). One end of the ferrite bead FB1 is electrically connected to the output terminal VCC_3V3 of the voltage regulator chip U2 (i.e., the primary control power supply VCC_3V3), and the other end of the ferrite bead FB1 is connected to the secondary output power supply (i.e., the secondary control power supply VCC_3V3). Figure 4 The MCU_3V3 in the system is electrically connected, that is, a ferrite bead is connected in series between the primary control power supply (i.e., VCC_3V3) and the secondary control power supply (i.e., MCU_3V3). The ferrite bead can reduce noise, and after noise reduction, it can supply power to the main control module. In addition, multiple filter capacitors (C10-C12) are connected in parallel between the primary control power supply and the secondary control power supply.
[0043] As described above, the output of the voltage regulator chip U2 is filtered by the secondary control circuit and then powered by the MCU_3V3 as the main control module (such as the main control chip U7) to provide control power.
[0044] (4) LED lamp, wherein the LED lamp is electrically connected to the LED power supply module and the temperature sensing module respectively.
[0045] (5) Main control module, which is electrically connected to the interface module, LED power supply module, temperature sensing module and control power supply module respectively. The main control module includes components such as the main control chip U7. The following is in conjunction with Figure 5 The above-mentioned main control module will be described in detail.
[0046] In practical applications, such as Figure 5 As shown, the main control module includes a main control chip U7. The I / O ports of the main control chip U7 are connected to the LED power supply module, the interface module, and the temperature sensing module, respectively. Specifically, the GPIO9 pin of the main control chip is electrically connected to the EN port of the analog switch U1. The GPIO19 and GPIO20 pins of the main control chip are both electrically connected to the interface module for receiving DM / DP signals. The GPIO37 pin of the main control chip U7 is electrically connected to the SDA pin of the temperature sensing chip U5, and the GPIO38 pin of the main control chip U7 is electrically connected to the SCL pin of the temperature sensing chip U5. By connecting the I / O ports of the main control chip U7 to the SCL / SDA pins of the temperature sensing chip U5, the temperature information of the LED is transmitted to the main control module. Furthermore, the main control chip U7 is also coupled to the control power supply module, which outputs a 3.3V voltage to power the main control chip U7. Figure 5 As shown, Figure 5 All locations marked with MCU_3V3 are connected to the output terminal MCU_3V3 of the control power module.
[0047] In some other embodiments, the main control module further includes a crystal oscillator, which can be electrically connected to the XTAL_P and XTAL_N pins of the main control chip U7, thereby providing a basic clock signal to the main control chip U7.
[0048] (6) Temperature sensing module, which is electrically connected to the control power module, the main control module and the LED lamp respectively. The temperature sensing module includes a temperature sensing chip U5 and a decoupling capacitor C20, etc. The following describes the components in conjunction with the temperature sensing module. Figure 6 The temperature sensing module described above will be explained in detail.
[0049] In optional embodiments, such as Figure 1 As shown, the lighting drive control circuit of this utility model also includes a temperature sensing module, which is connected to the control power module, the main control module and the LED light respectively.
[0050] As described above, the temperature sensing module is electrically connected to the main control module and the LED light. Therefore, the temperature sensing module can obtain the temperature information of the LED light. Then, the temperature sensing module will transmit the temperature information to the main control module. The main control module will control the LED light accordingly (such as turning it off) based on the temperature information to achieve the purpose of real-time monitoring and prevent the LED light from malfunctioning due to high temperature.
[0051] In optional embodiments, such as Figure 6 As shown, the temperature sensing module includes a temperature sensing chip U5 and a decoupling capacitor C20, with the positive terminal of the temperature sensing chip U5 grounded through the decoupling capacitor C20.
[0052] In practical applications, such as Figure 6 As shown, the temperature sensing module includes a temperature sensing chip U5 and a decoupling capacitor C20. The V+ pin (positive terminal) of the temperature sensing chip U5 is electrically connected to the output terminal (VCC_3V3) of the control power supply module and the decoupling capacitor C20. The GND pin (negative terminal) of the temperature sensing chip U5 is grounded. The decoupling capacitor C20 is connected between the V+ pin and the GND pin of the temperature sensing chip U5, that is, the decoupling capacitor C20 is connected between the positive and negative terminals of the temperature sensing chip U5. In addition, as mentioned above, the temperature sensing module is electrically connected to the main control module. The specific connection relationship between the two can be as follows: the SCL pin of the temperature sensing chip U5 is electrically connected to the GPIO38 pin of the main control chip U7, and the SDA pin of the temperature sensing chip U5 is electrically connected to the GPIO37 pin of the main control chip U7.
[0053] As described above, the positive terminal of the temperature sensing chip U5 is electrically connected to the output terminal VCC_3V3 of the control power module, while the negative terminal of the temperature sensing chip U5 is grounded. This allows the control power module to provide a stable 3.3V voltage for powering the temperature sensing chip U5. Simultaneously, a decoupling capacitor C20 is connected between the positive and negative terminals of the temperature sensing chip U5 to filter out power supply noise and ensure stable operation of the temperature sensing chip U5.
[0054] In addition, such as Figure 6 As shown, the temperature sensing module also includes pull-up resistors R12 and R13, both of which are electrically connected to the temperature sensing chip U5. Specifically, the SCL pin of the temperature sensing chip U5 is electrically connected to the output terminal (i.e., VCC_3V3) of the control power module via the pull-up resistor R12; and the SDA pin of the temperature sensing chip U5 is electrically connected to the output terminal (i.e., VCC_3V3) of the control power module via the pull-up resistor R13.
[0055] As described above, the temperature sensing chip U5 outputs the LED temperature information to the main control chip U7 via the SCL / SDA pin, so that the main control module can perform corresponding control based on the real-time LED temperature information, such as turning off the LED to prevent the LED from malfunctioning due to high temperature.
[0056] In summary, the lighting drive control circuit for the unmanned aerial vehicle provided by this utility model: (1) It uses a step-down circuit composed of a MOS transistor and an inductor, which not only provides stable power supply, but also allows for flexible adjustment of output power to achieve the strobe effect. In addition, the overall components are small in size and light in weight, which better meets the needs of the aircraft in terms of weight reduction. (2) The control power module is coupled to the main control module and the temperature sensing module respectively. The control power module provides control power. In specific implementation, the control power module outputs 3.3V power. The LED power module is coupled to the main control module and the LED lamp respectively. The main control module outputs a PWM signal, which is used to control the adjustable output power of the LED power module, thereby enabling the LED lamp to achieve lighting effects such as constant light and strobe. (3) The temperature sensing module is coupled to the main control module and the LED lamp respectively. The temperature sensing module obtains the temperature information of the LED lamp and then transmits it to the main control module to achieve the purpose of real-time monitoring and prevent the LED lamp from malfunctioning due to high temperature.
[0057] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A lighting drive control circuit for an unmanned aerial vehicle, characterized in that, It includes a main control module and an LED power supply module, wherein the main control module is electrically connected to the LED power supply module, and the LED power supply module receives signals from the main control module and thereby adjusts the output power of the LED power supply module in real time.
2. The lighting drive control circuit according to claim 1, characterized in that, The LED power module includes an analog switch chip, a switching transistor, a diode, and an inductor. The analog switch chip is connected to the main control module to receive signals; the analog switch chip is connected to the switching transistor to output signals; and the switching transistor, diode, and inductor form a buck circuit.
3. The lighting drive control circuit according to claim 2, characterized in that, The switching transistor is a MOSFET.
4. The lighting drive control circuit according to claim 2, characterized in that, The LED power module also includes voltage divider resistors, which are connected in series in the circuit. The analog switch chip obtains the voltage difference through the voltage divider resistors.
5. The lighting drive control circuit according to claim 1, characterized in that, It also includes a control power module, which is electrically connected to the main control module. The control power module includes a voltage regulator chip and several filter capacitors, which are connected in parallel to the input and output terminals of the voltage regulator chip.
6. The lighting drive control circuit according to claim 5, characterized in that, It also includes a ferrite bead, which is connected in series at the output terminal of the voltage regulator chip. After noise reduction by the ferrite bead, it supplies power to the main control module.
7. The lighting drive control circuit according to claim 5, characterized in that, It also includes LED lights, and the LED power module is electrically connected to the LED lights.
8. The lighting drive control circuit according to claim 7, characterized in that, It also includes a temperature sensing module, which is connected to the control power module, the main control module and the LED light respectively.
9. The lighting drive control circuit according to claim 8, characterized in that, The temperature sensing module includes a temperature sensing chip and a decoupling capacitor, with the positive terminal of the temperature sensing chip grounded via the decoupling capacitor.
10. The lighting drive control circuit according to claim 5, characterized in that, It also includes an interface module, which is electrically connected to the control power module, the main control module and the LED power module respectively.