A tethered lighting unmanned aerial vehicle

Abstract

The utility model discloses a mooring lighting unmanned plane, in the prior art, the problem of mooring lighting unmanned plane height lift and mooring cable coordination. The utility model contains mooring box, unmanned plane and mooring cable, the lower surface of unmanned plane is equipped with LED lamp board, and the lower part of unmanned plane is connected through mooring cable and the winding device in mooring box, and the winding device contains winding wheel fixed shell, microswitch, tension spring, winding wheel and turnover trigger frame, and winding wheel sleeve is connected in winding wheel fixed shell, and one end of winding wheel pivot is connected with speed reducer and winding motor, and the radial opening of winding wheel fixed shell bottom is hinged with turnover trigger frame, and turnover trigger frame contains two trigger swing arms, wire pressing crossbeam and trigger crossbeam, and the tightening amount of mooring cable is given microswitch through turnover trigger frame, and microswitch gives the signal input end of singlechip with the signal of electric level. The technology can ensure the stability of unmanned plane ascending process, and improve the coordination and stability between whole equipment.

Description

Technical Field

[0001] This utility model relates to the field of drone auxiliary lighting technology, and in particular to a tethered lighting drone. Background Technology

[0002] Currently, drones are widely used in numerous fields, such as logistics and delivery, agricultural plant protection, environmental monitoring, emergency rescue, film and television shooting, and high-altitude fixed-point lighting. Tethered lighting drones are drone systems that connect to a ground power source or control system via a tethered cable. They use the ground power transmitted through the tethered cable as their power source, enabling them to hover in the air for extended periods and provide lighting services. They achieve ultra-long endurance and continuous operation, and utilize an automatic cable reel device for power management and tethered cable deployment and retraction, effectively solving the problems of high-altitude fixed-point lighting and mobile lighting.

[0003] In the event of natural disasters such as earthquakes and floods, where traditional lighting facilities may be damaged, tethered lighting drones can be deployed quickly to provide long-term, wide-area lighting support for rescue sites, facilitating the smooth progress of rescue work. In scenarios such as security for large-scale events and traffic emergency monitoring, they can also provide high-altitude perspective support and can be used for lighting at night construction sites or maintenance sites to ensure construction progress and safety. For example, when maintaining and repairing power transmission and distribution lines at night, traditional lighting equipment often cannot meet the needs of efficient and safe operation. Maintenance personnel mainly rely on headlamps for lighting, but there are several shortcomings: (1) Limited brightness and illuminance, making it difficult to cover a large area of ​​work. (2) Limited continuous lighting time, which can lead to weakening or even extinguishing of the lighting effect after a long period of use, potentially causing work interruption or accidents. (3) Sometimes maintenance personnel need to frequently adjust the position of their headlamps to ensure that the lighting covers the work area, reducing work efficiency.

[0004] However, the cable winding section in the existing technology still has some shortcomings. For example, the utility model application with application number CN202422538792.X and name "An Integrated Tethered Drone" states: "

[0035] In use, the dual-axis motor 61 is started by the controller 3, ... The dual-axis motor 61 is started by the controller 3 to drive the transmission gear 64 to rotate. The rotation of the transmission gear 64 meshes with the driven gear 73, the rotating shaft 72 and the winding roller 71 to rotate, thereby winding and unwinding the cable 4. By setting up the lighting lamp 8, high-altitude lighting can be achieved at any time during mobile operations." The tethered cable uses the dual-axis motor 61 to drive the transmission gear 64 to rotate for winding and unwinding, but it does not consider the coordination or synchronization between the ascent and descent of the tethered lighting drone and the winding and unwinding of the tethered cable. In particular, it does not consider how the winding roller 71 can synchronously unwind the cable during the drone's ascent, so that the unwinding speed is close to the drone's ascent speed, and ultimately minimizes the drone's ascent resistance. That is, it did not consider how to prevent the release speed of the tether cable from suddenly being less than the drone's ascent speed, which would cause the drone to be dragged and shaken, thus hindering the improvement of the overall system coordination and stability of the equipment. Utility Model Content

[0005] This invention improves upon the coordination issues between altitude rise and fall and the deployment and retraction of tethered lighting drones in the prior art, providing a tethered lighting drone with a reasonable structure and reliable operation.

[0006] The technical solution of this utility model is to provide a device with the following structure: a tethering box, a drone, and a tethering cable. The lower surface of the drone is equipped with an LED light panel. The lower part of the drone is connected to a winding device inside the tethering box via the tethering cable. The winding device includes a winding wheel fixing shell, a micro switch, a tension spring, a winding wheel, and a flip trigger frame. The winding wheel is sleeved inside the winding wheel fixing shell. One end of the winding wheel shaft is connected to a reducer and a winding motor. A flip trigger frame is hinged at the radial opening at the bottom of the winding wheel fixing shell. The flip trigger frame includes two trigger arms, a wire-pressing beam, and a trigger beam. The inner sides of the two trigger arms are equipped with the wire-pressing beam. The arm is hinged to the inside of the winding reel fixing housing. The outer sides of the two trigger arms are connected to a trigger beam. The length of the trigger beam is greater than the axial width of the winding reel fixing housing. The trigger part extending from one end of the trigger beam is attached to the trigger part of the micro switch on the outside of the winding reel fixing housing. The middle part of the trigger beam is connected to the outside of the winding reel fixing housing via a tension spring. The hinged side of the flip trigger frame is connected to the outside of the winding reel fixing housing via a tension spring. A tethering cable is threaded between the trigger beam and the pressure beam. The tightening amount of the tethering cable is transmitted to the micro switch through the flip trigger frame. The micro switch transmits the signal to the signal input terminal of the microcontroller as a level signal. The signal output terminal of the microcontroller is connected to the winding motor.

[0007] Preferably, the micro switch transmits the level signal to the signal input terminal of the microcontroller through a level conversion circuit. The level conversion circuit includes DC3V, resistor R26, micro switch connection interface P3, ESD diode D5, capacitor C36, and resistor R29. The two ends of the micro switch connection interface P3 are connected in parallel with ESD diode D5 and capacitor C36, and then connected to DC3.3V through resistor R26, and finally connected to the DC3.3V circuit. The micro switch connection interface P3 is connected in series with resistor R29 and then connected to pin PA8 of the UAV main control chip.

[0008] Preferably, the wound motor is connected to the positive and negative terminals of DC12V through pins 4 and 3 of interface P2, and pin 1 is connected to pin PA5 of the UAV main control chip.

[0009] Preferably, the drone is made of aluminum alloy, and an LED light panel is attached to its lower surface.

[0010] Preferably, the tethering box is equipped with a switching power supply to convert mains power into 48-80V DC power to power the LED light board.

[0011] Preferably, the tethering box is equipped with a touch control screen that displays the working current, power supply voltage, power, light on button and brightness sliding touch bar of the LED light panel, and displays the drone's altitude control button, reel-in button, take-off button and landing button.

[0012] Preferably, the winding device includes a winding motor, a reducer, a pulley, and a belt, wherein the winding motor drives the winding wheel to rotate through the reducer, pulley, and belt.

[0013] Compared with the prior art, the present invention has the following advantages: 1. When rewinding, a speed reducer is used to pull the tether cable. When releasing the cable for ascent, the tether cable can be actively loosened simultaneously through the winding device to reduce unnecessary load on the drone, prevent the drone from being dragged too tightly when the tether cable is tightened, reduce the possibility of the drone being dragged and damaged, ensure the smoothness of the drone's ascent process, and improve the coordination and stability of the entire equipment.

[0014] 2. By connecting the ground power source to the drone, it is easier to enhance the lighting capabilities of the rescue site, providing better lighting conditions for rescue or construction activities. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the tethering box in this utility model; Figure 3This is a schematic diagram of the top structure of the tethered lighting drone in this utility model; Figure 4 This is a schematic diagram of the bottom structure of the tethered lighting drone in this utility model; Figure 5 This is a three-dimensional structural diagram of the winding device after installation in this utility model; Figure 6 This is an exploded structural diagram of the winding device in this utility model; Figure 7 This is a schematic diagram of the structure of the flip trigger frame in this utility model; Figure 8 This is a schematic diagram of the working state of the winding device for the tethered cable when it is dragged by a tethered lighting drone in this utility model; Figure 9 This is a schematic diagram of the working state of the winding device of the tethered cable when it is not dragged by the tethered lighting drone in this utility model; Figure 10 This is the circuit connection diagram of the main control chip in this utility model; Figure 11 This is the circuit diagram of the micro switch in this utility model; Figure 12 This is the interface circuit diagram of the wound motor in this utility model.

[0016] In the attached diagram, number 1 represents the tether box, 2 represents the drone, 3 represents the tether cable, 4 represents the switching power supply, and 5 represents the winding device.

[0017] 5-1 is the winding wheel fixing housing, 5-2 is the pulley, 5-3 is the winding wheel, 5-4 is the trigger beam, 5-5 is the trigger swing arm, 5-6 is the wire pressing beam, 5-7 is the micro switch, 5-8 is the tension spring, and 5-9 is the winding motor. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: As shown in the figure, this embodiment includes a tethering box 1, a drone 2, and a tethering cable 3. The lower surface of the drone 2 is provided with an LED light panel. The lower part of the drone 2 is connected to the winding device 5 inside the tethering box 1 through the tethering cable 3. The winding device 5 includes a winding wheel fixing shell 5-1, a micro switch 5-7, a tension spring 5-8, a winding wheel 5-3, and a flip trigger frame. The winding wheel 5-3 is sleeved inside the winding wheel fixing shell 5-1. One end of the shaft of the winding wheel 5-3 is connected to a reducer and a winding motor 5-9. A flip trigger frame is hinged at the radial opening at the bottom of the winding wheel fixing shell 5-1. The flip trigger frame includes two trigger swing arms 5-5, a wire pressing beam 5-6, and a trigger beam 5-4. The inner sides of the two trigger swing arms 5-5 are provided with the wire pressing beam 5-6. The swing arm 5-5 is hinged to the inside of the winding wheel fixing housing 5-1. The two trigger swing arms 5-5 are connected to the trigger beam 5-4 on their outer sides. The length of the trigger beam 5-4 is greater than the axial width of the winding wheel fixing housing 5-1. The trigger part extending from one end of the trigger beam 5-4 is attached to the trigger part of the micro switch 5-7 on the outside of the winding wheel fixing housing 5-1. The middle part of the trigger beam 5-4 is connected to the outside of the winding wheel fixing housing 5-1 through the tension spring 5-8. The hinged side of the flip trigger frame is connected to the outside of the winding wheel fixing housing 5-1 through the tension spring 5-8. A tethering cable 3 is passed between the trigger beam 5-4 and the pressure beam 5-6. The tightening amount of the tethering cable 3 is transmitted to the micro switch 5-7 through the flip trigger frame. The micro switch 5-7 transmits the signal to the signal input terminal of the microcontroller as a level signal. The signal output terminal of the microcontroller is connected to the winding motor 5-9.

[0020] like Figure 7-9 As shown, a rotatable winding wheel 5-3 is fitted inside the winding wheel fixing housing 5-1. The shaft at one end of the winding wheel 5-3 is connected to the reducer and the winding motor 5-9 in sequence via a pulley 5-2 and a belt. The winding wheel 5-3 is wound with a tethering cable 3 connecting the UAV 2 and the tethering box 1. The winding wheel 5-3 is equipped with multiple conductive slip rings to ensure reliable electrical connection during rotation. The pressure beam 5-6 is located in the upper half of the lower part of the tethering cable 3. When the tethering cable 3 tends to tighten, it can lift it to a certain height, causing the entire flip trigger frame to lift. This allows the extended end of the trigger arm 5-5 to strike the trigger part of the micro switch 5-7, pressing it down and generating a switching signal. The switching signal is connected to the signal input terminal of the main control chip. After processing by the main control chip, PWM waveforms with different duty cycles are finally output at the output pin PA5 of the main control chip, enabling the winding motor 5-9 to achieve different directions.

[0021] When the tethering cable 3 is no longer taut, the flip trigger frame will droop under its own weight. At this time, the extended end of the trigger arm 5-5 will move away from the trigger part of the micro switch 5-7, and the micro switch 5-7 will be in the pop-up open state, not generating a switching signal. The wound motor 5-9 will not operate at this time. The tension of the spring 5-8 can overcome part of the weight of the flip trigger frame, so that only a small tension force is needed when the tethering cable 3 is taut when it is lifted. Adjusting the tension of the spring 5-8 to generate appropriate tension can enhance the sensitivity of the trigger action.

[0022] like Figure 10-12 As shown, microswitch 5-7 transmits the level signal to the signal input terminal of the microcontroller through a level conversion circuit. The level conversion circuit includes DC3V, resistor R26, microswitch 5-7 connection interface P3, ESD diode D5, capacitor C36, and resistor R29. After ESD diode D5 and capacitor C36 are connected in parallel across microswitch 5-7 connection interface P3, they are then connected to DC3.3V through resistor R26, and finally connected to the DC3.3V circuit. Microswitch 5-7 connection interface P3 is connected in series with resistor R29 and then connected to pin PA8 of the UAV 2 main control chip.

[0023] When the output of the level conversion circuit is not in operation, it outputs a high level. When the tethered cable 3 is pulled out, the part of it that is about to be pulled out near the winding wheel 5-3 will pull the flip trigger frame that is hinged at the radial opening at the bottom of the winding wheel fixing shell 5-1. The slight movement will cause the flip trigger frame to swing slightly upward. The flip trigger frame transmits this swing amount to the micro switch 5-7 on the outside of the winding wheel fixing shell 5-1. After the micro switch is turned on, the output of the level conversion circuit is in operation and outputs a low level. At this time, the low level is input into the main control chip. After processing, it outputs PWM waveforms with different duty cycles to adjust the rotation of the winding motor 5-9, and finally drives the winding wheel 5-3 to rotate, realizing active cable release. When the ascent speed of the drone 2 is less than the speed of cable release, the above process will stop briefly. If it is tightened again, it will continue to trigger, and the above process will be repeated.

[0024] The wound motor 5-9 is connected to the positive and negative terminals of DC12V via pins 4 and 3 of interface P2, and pin 1 is connected to pin PA5 of the main control chip of drone 2. The operating speed of the wound motor 5-9 can be adjusted. For example, during the first half of the drone 2's ascent, when there is more wire wound on the winding wheel 5-3 and the loose wire diameter is larger, the speed can be slightly slower. During the second half of the drone 2's ascent, when there is less wire wound on the winding wheel 5-3 and the loose wire diameter is smaller, the speed can be slightly faster. The speed of the wound motor 5-9 is adjusted by regulating the duty cycle of the PWM waveform.

[0025] The drone 2 is made of aluminum alloy, with an LED light panel attached to its lower surface. The aluminum alloy body not only provides sufficient strength but also serves as a heat sink for the LED light panel. The tethering box 1 contains a switching power supply 4, which converts AC power to 48-80V DC power to supply the LED light panel. Higher DC voltage results in lower current to the LED light panel, less line loss, and easily increases the maximum usable power. The tethering box 1 has a touch control screen displaying the LED light panel's operating current, supply voltage, power, light-on button, and brightness slider, as well as the drone 2's altitude control, reel-in, takeoff, and landing buttons. The winding device includes a winding motor 5-9, a reducer, a pulley 5-2, and a belt. The winding motor 5-9 drives the winding pulley 5-3 to rotate via the reducer, pulley 5-2, and belt.

[0026] The operation process of this application is as follows: First, remove the drone 2 from the tether box 1 and pull out about 5 meters of tether cable 3. Then, place the drone 2 about 5 meters away from the tether box. Set the flight altitude to 10 meters, then click the take-off button. After a few seconds, the drone 2 will automatically start and emit a warning sound for about 20 seconds to remind people to pay attention to the distance. At this time, click the light-on button to turn on the LED light panel, and set the initial brightness to a brightness ratio of 10%. When the drone 2 flies to a height of 10 meters, it will automatically hover. Then, the brightness can be controlled by sliding the touch bar.

[0027] During flight, the altitude of Drone 2 can be adjusted in real time using the altitude control button. When landing is required, clicking the descent control button will cause Drone 2 to descend slowly, at approximately 30 centimeters per second. During descent, the cable winding device 5 will automatically reel in the cable as Drone 2 descends. When it is about 5 meters above the ground, the brightness is reduced to below 10%. Cable winding stops when it reaches about 3 meters above the ground, and Drone 2 continues to descend automatically. Similarly, when not in flight, the light is limited to 10% of its maximum power to prevent visual stimulation to the operator at close range. After landing, the light can be manually turned off before Drone 2 is stored and packed away. Manual cable winding can be performed without interrupting power and is effective in all situations.

[0028] The above description is only a preferred embodiment of the present utility model. For those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A tethered lighting drone, characterized in that: The device includes a tethering box, a drone, and a tethering cable. The drone has an LED light panel on its lower surface. The lower part of the drone is connected to a winding device inside the tethering box via the tethering cable. The winding device includes a winding wheel housing, a microswitch, a tension spring, a winding wheel, and a flip trigger frame. The winding wheel is fitted inside the winding wheel housing. One end of the winding wheel shaft is connected to a reducer and a winding motor. A flip trigger frame is hinged to the radial opening at the bottom of the winding wheel housing. The flip trigger frame includes two trigger arms, a wire-pressing beam, and a trigger beam. The inner sides of the two trigger arms have wire-pressing beams, and the two trigger arms are hinged to the inner side of the winding wheel housing. Two trigger arms are connected to a trigger beam on their outer sides. The length of the trigger beam is greater than the axial width of the winding wheel fixing housing. The trigger part extending from one end of the trigger beam is attached to the trigger part of the micro switch on the outer side of the winding wheel fixing housing. The middle part of the trigger beam is connected to the outer side of the winding wheel fixing housing via a tension spring. The hinge side of the flip trigger frame is connected to the outer side of the winding wheel fixing housing via a tension spring. A tethering cable is threaded between the trigger beam and the pressure beam. The tightening amount of the tethering cable is transmitted to the micro switch through the flip trigger frame. The micro switch transmits the signal to the signal input terminal of the microcontroller as a level signal. The signal output terminal of the microcontroller is connected to the winding motor.

2. The tethered lighting drone according to claim 1, characterized in that: The microswitch transmits the level signal to the signal input terminal of the microcontroller through a level conversion circuit. The level conversion circuit includes DC3V, resistor R26, microswitch connection interface P3, ESD diode D5, capacitor C36, and resistor R29. The two ends of the microswitch connection interface P3 are connected in parallel with ESD diode D5 and capacitor C36, and then connected to DC3.3V through resistor R26, and finally connected to the DC3.3V circuit. The microswitch connection interface P3 is connected in series with resistor R29 and then connected to pin PA8 of the UAV main control chip.

3. The tethered lighting drone according to claim 1, characterized in that: The wound motor is connected to the positive and negative terminals of DC12V through pins 4 and 3 of interface P2, and pin 1 is connected to pin PA5 of the UAV main control chip.

4. The tethered lighting drone according to claim 1, characterized in that: The drone is made of aluminum alloy, and an LED light panel is attached to its lower surface.

5. The tethered lighting drone according to claim 1, characterized in that: The tethering box is equipped with a switching power supply, which converts the mains power into 48-80V DC power to power the LED light board.

6. The tethered lighting drone according to claim 1, characterized in that: The tethering box is equipped with a touch control screen that displays the LED light panel's operating current, power supply voltage, power, light on / off button, and brightness slider, as well as the drone's altitude control button, reel-in button, takeoff button, and landing button.

7. The tethered lighting drone according to claim 1, characterized in that: The winding device includes a winding motor, a reducer, a pulley, and a belt. The winding motor drives the winding wheel to rotate through the reducer, pulley, and belt.

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