Light flow shading device of unmanned aerial vehicle

Abstract

The utility model discloses an optical flow shading device of an unmanned aerial vehicle. The optical flow shading device comprises an optical flow module, a shading module and a power supply module, the optical flow module is used for assisting positioning of the unmanned aerial vehicle, and the shading module is arranged at the lower end of the optical flow module and used for adjusting the light incoming amount of the optical flow module; the power supply module is coupled with the optical flow module and the shading module and supplies power to the optical flow module and the shading module. The optical flow module ensures that the unmanned aerial vehicle can be stably positioned in the flight process, and the shading module can adjust the light incoming amount of the optical flow module according to actual requirements, so that the damage of too strong light to the image sensor is effectively avoided. The power supply module stably supplies power to the optical flow module and the shading module, and reliable operation of the whole device in various complex environments is ensured, so that the stability and adaptability of the unmanned aerial vehicle under complex light conditions are remarkably improved, the image sensor is effectively protected, and the service life of the image sensor is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle technology, and in particular to an optical flow shielding device for unmanned aerial vehicles. Background Technology

[0002] With the rapid development of drone technology, its application areas are constantly expanding. In drone formation and laser hybrid performances, drones need to traverse complex laser grids. However, the diffraction spot of a high-energy laser beam can form a scorching focal point in the air with a diameter of less than 2 millimeters and a power density as high as 500W / cm², far exceeding the damage threshold of 0.1J / cm² for CMOS image sensors. When formation drones traverse the laser grid, the microlens array on the sensor surface focuses the incident laser into a nanoscale high-temperature hot spot, causing an avalanche breakdown effect in the silicon-based photosensitive unit. Even a short period of irradiation can cause irreversible damage to the sensor, seriously threatening the safety and stability of the performance. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an optical flow shielding device for unmanned aerial vehicles, so as to solve the problem that the image sensor of unmanned aerial vehicles is easily damaged by lasers during formation and laser mixed performances in the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a light flow shielding device for unmanned aerial vehicles, comprising:

[0005] Optical flow module, used to assist in the positioning of unmanned aerial vehicles;

[0006] A light-shielding module, located at the lower end of the optical flow module, is used to adjust the amount of light entering the optical flow module;

[0007] The power supply module is coupled to the optical flow module and the light-shielding module respectively, and supplies power to the optical flow module and the light-shielding module.

[0008] Furthermore, it also includes a switch module, which is coupled to the power module and the optical flow module respectively, and the switch module is used to control the on and off of the light-shielding module.

[0009] Furthermore, the switching module includes a MOSFET, the source of which is connected to the power supply module, the drain of which is connected to the light-shielding module, and the gate of which is connected to a control signal, thereby controlling the on / off state of the light-shielding module.

[0010] Furthermore, the switching module also includes a current-limiting resistor, which serves to limit the current.

[0011] Furthermore, the switching module also includes a control unit, the signal terminal of which is connected to the gate of the MOS transistor.

[0012] Furthermore, the switching module also includes a transistor, the base of which is connected to the power supply module, the emitter of which is grounded, and the collector of which is connected to the gate of the MOSFET.

[0013] Furthermore, the MOS transistor is a P-type MOS transistor, and the transistor is an NPN transistor.

[0014] Furthermore, the switching module also includes a delay capacitor, the positive terminal of which is connected to the gate of the MOS transistor, and the negative terminal of which is grounded.

[0015] Furthermore, the light-shielding module uses a polar dimming film, which is atomized when not powered and transparent when powered.

[0016] Furthermore, the polar dimming film of the light-shielding module has a scattering rate greater than 90% when it is not powered on, and a transmittance greater than 80% when it is powered on.

[0017] The beneficial effects of this invention are as follows: The optical flow shading device for unmanned aerial vehicles (UAVs) provided by this invention, by setting up an optical flow module, a shading module, and a power supply module, provides precise positioning assistance and flexible light adjustment functions for the UAV. The optical flow module ensures stable positioning of the UAV during flight, while the shading module can adjust the amount of light entering the optical flow module according to actual needs, effectively avoiding damage to the image sensor from excessive light. The power supply module stably supplies power to the optical flow module and the shading module, ensuring reliable operation of the entire device in various complex environments. This significantly improves the stability and adaptability of the UAV under complex lighting conditions, effectively protects the image sensor, and extends its service life. Attached Figure Description

[0018] Figure 1 This is a structural block diagram of the optical flow shielding device for an unmanned aerial vehicle according to Embodiment 1 of this utility model;

[0019] Figure 2 This is a circuit diagram of the optical flow shielding device for an unmanned aerial vehicle according to Embodiment 1 of this utility model;

[0020] Figure 3 This is a simplified structural diagram of the light-shielding module according to Embodiment 1 of this utility model;

[0021] Figure 4 This is a circuit diagram of the optical flow shielding device for an unmanned aerial vehicle according to Embodiment 2 of this utility model;

[0022] Figure 5 This is a circuit diagram of the optical flow shielding device for an unmanned aerial vehicle according to Embodiment 3 of this utility model. Detailed Implementation

[0023] 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.

[0024] Please refer to Figures 1 to 5 A light flow shielding device for an unmanned aerial vehicle includes:

[0025] Optical flow module, used to assist in the positioning of unmanned aerial vehicles;

[0026] A light-shielding module, located at the lower end of the optical flow module, is used to adjust the amount of light entering the optical flow module;

[0027] The power supply module is coupled to the optical flow module and the light-shielding module respectively, and supplies power to the optical flow module and the light-shielding module.

[0028] As described above, the beneficial effects of this invention are as follows: by incorporating an optical flow module, a light-shielding module, and a power supply module, it provides precise positioning assistance and flexible light adjustment functions for the unmanned aerial vehicle (UAV). The optical flow module ensures stable positioning of the UAV during flight, while the light-shielding module can adjust the amount of light entering the optical flow module according to actual needs, effectively preventing damage to the image sensor from excessive light. The power supply module stably supplies power to the optical flow module and the light-shielding module, ensuring reliable operation of the entire device in various complex environments. This significantly improves the stability and adaptability of the UAV under complex lighting conditions, effectively protects the image sensor, and extends its service life.

[0029] Furthermore, it also includes a switch module, which is coupled to the power module and the optical flow module respectively, and the switch module is used to control the on and off of the light-shielding module.

[0030] As described above, the addition of the switch module enables precise control over the on / off state of the shading module, enhancing the flexibility and adaptability of the device. It can quickly adjust the shading state according to changes in the flight environment, effectively protecting the image sensor from damage caused by sudden strong light.

[0031] Furthermore, the switching module includes a MOSFET, the source of which is connected to the power supply module, the drain of which is connected to the light-shielding module, and the gate of which is connected to a control signal, thereby controlling the on / off state of the light-shielding module.

[0032] As described above, the introduction of a MOSFET and the control of the gate signal enable precise control of the light-shielding module, improving the accuracy and response speed of the control. This ensures that the light-shielding module can quickly respond to changes in flight status and provides timely protection for the image sensor.

[0033] Furthermore, the switching module also includes a current-limiting resistor, which serves to limit the current.

[0034] As can be seen from the above description, adding a current-limiting resistor effectively protects the circuit from the impact of excessive current, improves the stability and reliability of the device, extends the service life of the device, and ensures long-term stable operation in complex environments.

[0035] Furthermore, the switching module also includes a control unit, the signal terminal of which is connected to the gate of the MOS transistor.

[0036] As described above, the introduction of a control unit enables the shading module to automatically adjust its on / off state according to flight status and ambient light intensity, thereby enhancing the intelligence level of the device, reducing manual intervention, and improving flight safety and efficiency.

[0037] Furthermore, the switching module also includes a transistor, the base of which is connected to the power supply module, the emitter of which is grounded, and the collector of which is connected to the gate of the MOSFET.

[0038] As described above, adding a transistor, which works in conjunction with the MOSFET and power module, ensures the effective transmission and execution of control signals, guarantees the stable operation of the light-shielding module, and optimizes the overall circuit performance and reliability.

[0039] Furthermore, the MOS transistor is a P-type MOS transistor, and the transistor is an NPN transistor.

[0040] As described above, the combination of P-type MOSFETs and NPN transistors optimizes the circuit design, reduces power consumption, improves response speed, ensures efficient operation in complex environments, and enhances the stability and reliability of the circuit.

[0041] Furthermore, the switching module also includes a delay capacitor, the positive terminal of which is connected to the gate of the MOS transistor, and the negative terminal of which is grounded.

[0042] As described above, adding a delay capacitor allows the light-shielding module to achieve a smooth transition after power failure, avoiding the impact of sudden changes in light on the optical flow module, and improving the stability of the device and the safety of the image sensor.

[0043] Furthermore, the light-shielding module uses a polar dimming film, which is atomized when not powered and transparent when powered.

[0044] As described above, using a polar dimming film as a light-shielding module can achieve light shading and light transmission in both non-powered and powered states, respectively, meeting the light adjustment needs of different scenarios, effectively protecting the image sensor, and improving the adaptability and practicality of the device.

[0045] Furthermore, the polar dimming film of the light-shielding module has a scattering rate greater than 90% when it is not powered on, and a transmittance greater than 80% when it is powered on.

[0046] As described above, the polar dimming film has a scattering rate of over 90% when not powered and a transmittance of over 80% when powered, ensuring the optical performance of the light-shielding module under different conditions. It can effectively block lasers while ensuring the passage of normal light, improving the reliability and effectiveness of the light-shielding module and providing comprehensive protection for the image sensor.

[0047] Please refer to Figures 1 to 3 One embodiment of this utility model is: an optical flow shading device for an unmanned aerial vehicle (UAV), comprising an optical flow module, a shading module, a switch module, and a power supply module; the optical flow module is used to assist the UAV in positioning; the shading module, located at the lower end of the optical flow module, is used to adjust the amount of light entering the optical flow module; the power supply module is coupled to both the optical flow module and the shading module, supplying power to both; the shading module uses a polarized dimming film, which is atomized when not powered and transparent when powered; the switch module includes a MOSFET, a transistor, and a current-limiting resistor, used to control the on / off state of the shading module; the power supply module... The system provides power to the optical flow module and the light-shielding module. The power module is coupled to the optical flow module, the light-shielding module, and the switch module, respectively, to supply power to the optical flow module and the light-shielding module. The switch module is coupled to the optical flow module and is used to control the on / off state of the light-shielding module. Under joint control, when the optical flow module is on, the switch module controls the light-shielding module to be on; when the optical flow module is off, the switch module controls the light-shielding module to be off. It is understood that by setting up the light-shielding module, the switch module, and the power module, damage to the image sensor by laser light can be effectively prevented, improving the stability and reliability of the UAV in complex lighting environments. The light-shielding module uses a polarized dimming film, which can achieve light shading and light transmission in both non-powered and powered states, meeting the needs of different scenarios. The design of the switch module enables flexible control of the light-shielding device, allowing for independent control or linkage with the optical flow module, while also possessing a delayed shutdown function to ensure reliable operation of the light-shielding device.

[0048] For the best option, please refer to the following: Figure 2 The polar dimming film of the light-shielding module has a scattering rate greater than 90% in the non-energized state and a transmittance greater than 80% in the energized state. This ensures the optical performance of the light-shielding module under different conditions, effectively blocking laser light while allowing normal light to pass through, thus improving the reliability and effectiveness of the light-shielding module. Furthermore, the thickness of the polar dimming film of the light-shielding module ranges from 0.1mm to 0.5mm, thereby ensuring the optical performance and mechanical strength of the dimming film and improving the stability and reliability of the light-shielding module.

[0049] Please combine Figure 3 In this circuit, Q1 is a MOSFET and Q2 is a transistor; R1 and R2 are current-limiting resistors, which limit the current in the circuit; the MOSFET is a P-type MOSFET and the transistor is an NPN transistor; it is understood that the P-type MOSFET has the characteristic of low-voltage conduction, and the NPN transistor has the characteristic of high-voltage conduction. This design ensures the stability and reliability of the switching module, while also being able to adapt to the flight requirements of UAVs in complex environments; specifically, the V optical current (i.e., the power supply to the optical current module) is connected to the base of transistor Q2 through the current-limiting resistor R2, and the emitter of transistor Q2 is grounded. The collector of the transistor is connected to the gate of MOSFET Q1; the source of MOSFET Q1 is connected to Vshield in, and a current-limiting resistor R1 is connected between the source and gate of Q1. The drain of Q1 is connected to Vshield out; Vshield out is connected to the light-shielding module, supplying power to the light-shielding module. When the optical flow module is enabled, Voptical flow is limited by the current-limiting resistor R2 and supplies power to transistor Q2. Transistor Q2 has the characteristic of high-voltage conduction. At this time, the gate of MOSFET Q2 is grounded. Since Q2 is a P-type MOSFET, and P-type MOSFETs have the characteristic of low-voltage conduction, Vshield in and Vshield out are turned on, powering on the light-shielding module. The reverse is also true.

[0050] Optionally, a filter can be placed between the light-shielding module and the optical flow module to filter light of a specific wavelength. This can further protect the image sensor from interference by harmful light and improve the imaging quality of the image sensor.

[0051] Alternatively, an alarm unit can be installed in the optical flow shading device of the unmanned aerial vehicle. When the shading module malfunctions, the alarm unit will issue an alarm signal, thus reminding the user to perform maintenance and repair, and improving the safety and reliability of the shading device.

[0052] Please refer to Figure 4 Embodiment 2 of this utility model is a further improvement on Embodiment 1. The difference between Embodiment 2 and Embodiment 1 is that the optical flow shading device of the unmanned aerial vehicle further includes a delay capacitor C1. The delay capacitor C1 is connected in the switching module and is used to realize the delayed shutdown function of the shading module. Specifically, the positive terminal of the delay capacitor C1 is connected to the base of the transistor Q2, and the negative terminal of the delay capacitor C1 is grounded. After adding the delay capacitor C1, a delay effect can be achieved, that is, after the V optical flow is cut off, the delay capacitor C1 can still supply power to the transistor Q2 for a short time, thereby enabling the switching module to achieve the purpose of delayed shutdown.

[0053] Please refer to Figure 5, Embodiment 3 of the present utility model is a further improvement made on the basis of Embodiment 1. The difference between Embodiment 3 and Embodiment 1 is that: the optical flow shading device of the unmanned aerial vehicle further includes a control unit, which is used to automatically control the shading degree and switch state of the shading module according to the flight state of the unmanned aerial vehicle and the ambient light intensity. In this way, the intelligent level and adaptability of the shading device are improved. Specifically, the control unit includes a light sensor and a microcontroller. The light sensor is used to detect the ambient light intensity, and the microcontroller controls the on / off of the switch module according to the light intensity signal and the flight state signal. In this way, the automatic and intelligent control of the shading device is realized.

[0054] Figure 5 Q3 in it is a MOS transistor, specifically a P-type MOS transistor. R3 is a current-limiting resistor, which plays a role in current limiting in the circuit; the positive pole of the control unit is connected to VCC3v3, and the negative pole is grounded; the gate of the MOS transistor Q3 is connected to the control unit, and the control unit controls the on / off of Q3. One end of the current-limiting resistor R3 is connected to the gate, and the other end is grounded. The source of the MOS transistor Q3 is connected to V shading in, and the drain of Q3 is connected to V shading out; V shading out is connected to the shading module to supply power to the shading module. Specifically, the control unit gives a low-level signal to Q3. Q3 is a P-type MOS transistor, and the P-type MOS transistor has the characteristic of conducting under low voltage. At this time, V shading in and V shading out are conducted, and the shading module is powered on. Vice versa.

[0055] As an option, the control unit can also be a manual control unit for manually controlling the on / off of the shading module. The manual control unit is connected in parallel with the switch module. In this way, the flexibility and reliability of the shading device are enhanced, ensuring that the shading module can still be manually operated when the automatic control fails.

[0056] To sum up, the optical flow shading device of the unmanned aerial vehicle provided by the present utility model can effectively prevent the damage of the laser to the image sensor by setting the shading module, the switch module and the power supply module, and improve the stability and reliability of the unmanned aerial vehicle in a complex light environment. The shading module uses a polarizing dimming film, which can achieve shading and light transmission in the non-powered and powered states respectively, meeting the requirements in different scenarios. The design of the switch module realizes the flexible control of the shading device, which can be controlled separately or联动 with the optical flow module to ensure the reliable operation of the shading device.

[0057] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model. All equivalent transformations made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in the related technical fields, are equally included in the patent protection scope of the present utility model.

Claims

1. An optical flow shade for an unmanned aerial vehicle, comprising: include: Optical flow module, used to assist in the positioning of unmanned aerial vehicles; A light-shielding module, located at the lower end of the optical flow module, is used to adjust the amount of light entering the optical flow module; The power supply module is coupled to the optical flow module and the light-shielding module respectively, and supplies power to the optical flow module and the light-shielding module.

2. The optical flow shade of an unmanned aerial vehicle of claim 1, wherein, It also includes a switch module, which is coupled to the power module and the optical flow module respectively, and the switch module is used to control the on and off of the light-shielding module.

3. The optical flow shade of an unmanned aerial vehicle of claim 2, wherein, The switching module includes a MOSFET, the source of which is connected to the power supply module, the drain of which is connected to the light-shielding module, and the gate of which is connected to a control signal, thereby controlling the on / off state of the light-shielding module.

4. The optical flow shade of claim 3, wherein, The switching module also includes a current-limiting resistor, which serves to limit the current.

5. The optical flow shade of claim 3, wherein, The switching module also includes a control unit, the signal terminal of which is connected to the gate of the MOS transistor.

6. The optical flow shade of claim 3, wherein, The switching module also includes a transistor, the base of which is connected to the power supply module, the emitter of which is grounded, and the collector of which is connected to the gate of the MOS transistor.

7. The optical flow shade of claim 6, wherein, The MOSFET is a P-type MOSFET, and the transistor is an NPN transistor.

8. The optical flow shade of claim 3, wherein, The switching module also includes a delay capacitor, the positive terminal of which is connected to the gate of the MOS transistor, and the negative terminal of which is grounded.

9. The optical flow shade of any of claims 1-8, wherein, The light-shielding module uses a polar dimming film, which is atomized when not powered and transparent when powered.

10. The optical flow shade of the unmanned aerial vehicle of claim 9, wherein, The polar dimming film of the light-shielding module has a scattering rate of more than 90% when it is not powered on, and a transmittance of more than 80% when it is powered on.

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