An unmanned aerial vehicle comprising a fire extinguishing device

Abstract

The utility model discloses a unmanned vehicle containing fire extinguishing device, in view of the problem that the unmanned vehicle still has room for improvement in the water spraying fire extinguishing process in the prior art. The utility model contains unmanned vehicle, quick detach connecting piece, throwing and spreading motor, throwing and spreading water tank and circuit box, and the lower side of unmanned vehicle is equipped with throwing and spreading motor, circuit box and throwing and spreading water tank, and the support of the lower side of unmanned vehicle is connected through quick detach connecting piece, and throwing and spreading motor and circuit box are located in the abdomen of unmanned vehicle, and the throwing and spreading control circuit in the inside of circuit box controls throwing and spreading motor to rotate after receiving the throwing and spreading order of unmanned vehicle remote controller, and the driving handle on the output shaft of throwing and spreading motor is drawn through the pull rope and draws the control water piece to conduct, and the throwing and spreading control circuit contains main control chip and throwing and spreading motor drive chip. The technology does not depend on the field water source and its depth, is not limited by whether the field is frozen or not, and the operator does not need to accurately control the unmanned vehicle to immerse the throwing and spreading water tank into the field water surface to a sufficient depth to realize watering, and is less limited by the external environment.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) equipment technology, and in particular to a UAV containing a fire extinguishing device. Background Technology

[0002] As is well known, wildfires are relatively difficult to control in forests and fields. Due to the unique natural environment and terrain, wildfires caused by natural or human factors are difficult for firefighters to extinguish in a timely manner. Drones carrying water for rapid firefighting can greatly improve this problem. Because drones are not subject to terrain requirements and still have the advantage of convenience over long distances, they are widely used in the field of firefighting. When using drones to patrol the forest, if an early fire is detected, it is only necessary to promptly notify the personnel at the fire station to launch other drones carrying water to extinguish it, or the drones themselves can carry water to extinguish the fire at any time.

[0003] According to the search, the application number: CN202311676335.0__application date: 2023.12.08, titled "A Water Spraying Drone for Wildfire Rescue", describes the following: "

[0024] The working principle and beneficial effects of the present invention are as follows: A water tank is installed at the bottom of the drone. After the early fire is detected, an alarm is triggered immediately. While waiting for the fire-fighting equipment to arrive at the fire scene, the drone can be controlled to find a water source. When taking water, the bottom plate is opened, the drone hovers above the water surface, the water tank is immersed in the water source to take water, and after the water tank is full, the bottom plate is closed to ensure that the water tank is sealed. Then the drone is controlled to reach the fire scene, fly above the fire source, and control the water spray valve to open through the controller to carry out the initial rapid fire extinguishing, thereby delaying the spread of the fire..."

[0004] Its operation requires the operator to be familiar with the location of water sources near the fire source, and the water source needs to be of a certain depth to allow the water tank to be immersed to a sufficient depth. It is greatly restricted by the external environment. If it freezes in winter, it is inconvenient to complete the tasks of fetching water and quickly extinguishing fires.

[0005] The following is also recorded:

[0051] A screw 15 is vertically rotatably mounted on the water tank 2. The screw 15 is threadedly connected to the pressure plate 14. ...

[0052] In this embodiment, the pressure plate 14 is sealed to the inner wall of the water tank 2. When the pressure plate 14 is pressed down, it can provide outflow pressure for the water in the water tank 2, so that when the sprinkler valve 5 is opened, it can ensure sufficient water flow and prevent the water flow from decreasing or the impact force from decreasing due to the gradual drop in the liquid level in the water tank 2. ... The rotational power of the output shaft of the lifting motor 17 is transmitted to the screw 15. The screw 15 and the pressure plate 14 are threadedly engaged. The lifting and lowering of the pressure plate 14 can be controlled by the rotation of the screw 15. ...

[0006] Its water supply is powered by a lifting motor 17 that drives a screw 15 to rotate, which in turn controls the lifting and lowering of the pressure plate 14. This compresses the water in the water tank 2 to overcome the problem of the water flow decreasing or the impact force decreasing due to the gradual drop in the liquid level. The water in the water tank 2 is powered by the drone's electricity, which consumes more energy and has a higher failure rate than gravity-fed flow.

[0007] Therefore, there is a need for a drone equipped with a fire extinguishing device that is convenient to obtain water from, not limited by the external environment, and has low energy consumption and high reliability in the water distribution process. Utility Model Content

[0008] This invention addresses the shortcomings in existing technologies for drone-based water spraying and fire extinguishing by providing a drone with a reasonable structure, energy efficiency, and fire extinguishing device.

[0009] The technical solution of this utility model is to provide a drone with a fire extinguishing device having the following structure: It includes a drone, a quick-release connector, a spraying motor, a spraying water tank, and a circuit box. The spraying motor, circuit box, and spraying water tank are located on the underside of the drone. The spraying water tank is connected to the bracket on the underside of the drone via the quick-release connector. The spraying motor and circuit box are located on the underside of the drone. The spraying control circuit inside the circuit box receives a spraying command from the drone remote controller and controls the spraying motor to rotate. The drive handle on the output shaft of the spraying motor pulls the control water component inside the spraying water tank via a pull rope, thus conducting the circuit. The spraying control circuit includes a main control chip GD32F103C8T6, a current-limiting resistor, and a spraying motor driver chip. In the main control chip GD32F103C8T6, pin PA10 is the input terminal of the control signal, and pins PA9 and PA8 are the output terminals of the drive signal. The drive signals are respectively connected to the input terminals of the spraying motor driver chip, and the output terminal of the spraying motor driver chip is connected to the spraying motor.

[0010] Preferably, the device includes a drone, a quick-release connector, a spraying servo, a spraying water tank, and a circuit box. The spraying servo, circuit box, and spraying water tank are located on the underside of the drone. The spraying water tank is connected to the bracket on the underside of the drone via the quick-release connector. The spraying servo and circuit box are located on the underside of the drone. The spraying control circuit inside the circuit box receives the spraying command from the drone remote controller and controls the spraying servo to rotate. The drive handle on the output shaft of the spraying servo pulls the control water component inside the spraying water tank through a pull rope to conduct electricity. The spraying control circuit includes a main control chip GD32F103C8T6 and a current-limiting resistor. In the main control chip GD32F103C8T6, pin PA10 is the input terminal of the control signal, and pin PA9 is the output terminal of the drive signal and is connected to the spraying servo.

[0011] Preferably, the spraying motor drive chip is model AS4950, and its pins 2 and 3 are connected in series with resistors and then connected to pins PA9 and PA8 of the main control chip. Pins PA9 and PA8 of the main control chip output drive signals AS_IN1 and AS_IN12 respectively to control the forward and reverse rotation of the spraying motor.

[0012] Preferably, the water control component includes a cover plate, a sealing ring, a drain pipe connector, and a fastening nut, wherein the upper end of the drain pipe connector is located inside the spray water tank, and its side is hinged to one side of the cover plate, with a sealing ring between the contact surfaces of the two hinged together; the middle part of the drain pipe connector is fitted into the drain hole at the bottom of the spray water tank; and the lower part of the drain pipe connector is fixed to the outside of the spray water tank after being tightened by the fastening nut.

[0013] Preferably, the water tank includes a water injection pipe and a pull rope positioning pipe. The water injection pipe is located on the side of the water tank, with its opening tilted upwards and a cap provided at the opening. The pull rope positioning pipe is located on the top surface of the water tank, with its opening vertically upwards and a pull rope sleeved inside.

[0014] Preferably, the bottom of the water spraying tank is provided with a drain plug.

[0015] Preferably, the drone is a plug-in drone or a hybrid drone.

[0016] Preferably, the pull rope is a steel wire rope or a nylon rope.

[0017] Preferably, pin PA10 of the main control chip GD32F103C8T6 is connected to the drone control module through a PWM signal interface and is powered by the drone battery.

[0018] Compared with existing technologies, the drone with fire extinguishing device of this invention has the following advantages:

[0019] 1. Water can be replenished via hoses at water supply sites, independent of the availability and depth of outdoor water sources, and unaffected by whether the water is frozen. Operators do not need to precisely control the drone to submerge the water tank to a sufficient depth on the water surface to fill the tank, thus minimizing environmental limitations. Even in winter when the water is frozen, antifreeze measures can be implemented for rapid water replenishment, achieving fast and efficient firefighting.

[0020] 2. When the drone triggers the water spraying mechanism to open, it uses relatively little electricity and does not require additional pressurization of the water in the spray tank, as it can flow out on its own under gravity.

[0021] 3. The throwing device supports quick assembly and disassembly, making it convenient for drones to carry other functional devices. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is one of the structural schematic diagrams of the water spraying device in Embodiment 1 of this utility model;

[0024] Figure 3 This is the second schematic diagram of the water spraying device in Embodiment 1 of this utility model;

[0025] Figure 4 This is a schematic diagram of the water spraying device in Embodiment 2 of this utility model;

[0026] Figure 5 This is a utility model Figure 2 and Figure 4 Enlarged structural schematic diagram of the central water control component;

[0027] Figure 6 This is a utility model Figure 5 A schematic diagram of the structure controlling the conduction state of the water supply components;

[0028] Figure 7 This is a utility model Figure 3 Enlarged structural schematic diagram of the central water control component;

[0029] Figure 8 This is a circuit connection diagram of the main control chip GD32F103C8T6 in the spraying control circuit of Embodiment 1 of this utility model;

[0030] Figure 9 This is a circuit connection diagram of the main control chip GD32F103C8T6 in the spraying control circuit of Embodiment 2 of this utility model;

[0031] Figure 10 This is a circuit connection diagram of the spraying motor drive chip in the spraying control circuit of Embodiment 1 of this utility model;

[0032] Figure 11 This is the external interface circuit diagram of the main control chip GD32F103C8T6 in this utility model.

[0033] In the attached diagram, number 1 represents the UAV, and 2 represents the water spraying device. 2-1 is the spraying motor, 2-1' is the spraying servo motor, 2-2 is the water tank, 2-3 is the pull rope, 2-4 is the water injection pipe, 2-5 is the water control component, 2-6 is the drain plug, 2-7 is the pull rope positioning tube, 2-8 is the circuit box, and 2-9 is the drive handle; 2-5-1 is the pull ring, 2-5-2 is the cover plate, 2-5-3 is the hinge shaft, 2-5-4 is the drain pipe connector, 2-5-5 is the fastening nut, and 2-5-6 is the sealing ring. Detailed Implementation

[0034] 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.

[0035] The following description, in conjunction with the accompanying drawings and specific embodiments, further illustrates the present invention's drone containing a fire extinguishing device: This solution communicates with the drone platform 1 via a PWM signal interface. The drone 1 can be a commercially available agricultural drone 1. The water spraying device 2 is connected to a bracket below the drone 1 via a quick-release connector or connector, allowing it to perform water spraying or fire extinguishing work in designated areas. The quick-release connector can be any model or type of quick-release connector available on the market.

[0036] Example 1, as Figure 1-3 As shown in Figure 8, the water spraying trigger action is achieved by the spraying motor 2-1 driving the drive handle 2-9, which pulls the control water component 2-5 inside the spraying water tank 2-2 to conduct electricity. The microcontroller converts the 12V power supply of the drone to 3.3V DC through its internal power module. Embodiment 1 includes a drone 1, a quick-release connector, and a water spraying device 2. The water spraying device 2 includes a spraying motor 2-1, a spraying water tank 2-2, and a circuit box 2-8. The spraying motor 2-1, circuit box 2-8, and spraying water tank 2-2 are located on the underside of the drone 1. The spraying water tank 2-2 can be connected to the bracket on the underside of the drone 1 via the quick-release connector. The spraying motor 2-1 and circuit box 2-8 are located on the underside of the drone 1. The spraying control circuit inside the circuit box 2-8 receives the spraying command from the drone 1's remote controller and controls the rotation of the spraying motor 2-1. The drive handle 2-9 on the output shaft of the spray motor 2-1 pulls the control water component 2-5 inside the spray water tank 2-2 through the pull rope 2-3, which is connected. The spray control circuit contains a main control chip GD32F103C8T6, a current limiting resistor, and a spray motor drive chip. In the main control chip GD32F103C8T6, pin PA10 is the input terminal of the control signal, and pins PA9 and PA8 are the output terminals of the drive signal. The drive signals are respectively connected to the input terminals of the spray motor drive chip, and the output terminal of the spray motor drive chip is connected to the spray motor 2-1.

[0037] The spraying motor driver chip is model AS4950. Pins 2 and 3 are connected in series with resistors and then connected to pins PA9 and PA8 of the main control chip. Pins PA9 and PA8 of the main control chip output drive signals AS_IN1 and AS_IN12 respectively to control the forward and reverse rotation of the spraying motor 2-1. Pin PA10 of the main control chip GD32F103C8T6 is connected to the control module of UAV 1 through a PWM signal interface and is powered by the battery of UAV 1.

[0038] Figure 8 AS_IN1 and AS_IN2 are two PWM waveform control signals with different duty cycles output by the microcontroller. After the two control signals are superimposed, they control the forward and reverse rotation of the spraying motor 2-1 through the spraying motor driver chip AS4950. H3 is the interface of the spraying motor 2-1.

[0039] When a water spraying command is received, AS_IN1 is a PWM wave with a 100% duty cycle that causes the spray motor 2-1 to rotate forward, and AS_IN2 is a PWM wave with a 0% duty cycle. These are combined to create a PWM wave that causes the spray motor 2-1 to rotate forward with a 100% duty cycle. The spray motor 2-1 drives the drive handle 2-9 and pulls the rope 2-3, causing it to open the cover 2-5-2 of the water control component 2-5, allowing water to fall automatically. The forward rotation control duration is timed using a timer set in the microcontroller's internal program, for example, a duration of 1-3 seconds.

[0040] When a homing command is received, AS_IN1 is a PWM wave with a duty cycle of 0 that causes the spraying motor 2-1 to rotate forward, and AS_IN2 is a PWM wave with a duty cycle of 100%. These are then combined to produce a PWM wave with a duty cycle of 100% that causes the spraying motor 2-1 to rotate in reverse. The reverse control duration is timed using a timer set in the microcontroller's internal program, for example, a duration of 1-3 seconds.

[0041] Example 2, as Figure 1 , 4As shown in Figure 9, the water spraying trigger action is achieved by the spraying servo 2-1' driving the drive handle 2-9, which pulls the control water component 2-5 inside the spraying water tank 2-2 to conduct. The microcontroller converts the 12V power supply of the UAV 1 to DC 3.3V through its internal power module. The servo also converts the 12V power supply of the UAV 1 to DC 5V through its internal power module. Embodiment 2 includes a UAV 1, a quick-release connector, and a water spraying device 2. The water spraying device 2 includes a spraying servo 2-1', a spraying water tank 2-2, and a circuit box 2-8. The UAV 1 has the spraying servo 2-1', circuit box 2-8, and spraying water tank 2-2 located on its underside. The spraying water tank 2-2 is connected to the bracket on the underside of the UAV 1 via the quick-release connector. The spraying servo 2-1' and circuit box 2-8 are located on the underside of the UAV 1. The spraying control circuit inside the circuit box 2-8 receives signals from the UAV 1. After the remote controller issues a spraying command, it controls the spraying servo 2-1' to rotate. The drive handle 2-9 on the output shaft of the spraying servo 2-1' pulls the control water component 2-5 inside the spraying water tank 2-2 via the pull rope 2-3, thus activating the circuit. The spraying control circuit contains a main control chip GD32F103C8T6 and a current-limiting resistor. Pin PA10 of the main control chip GD32F103C8T6 is the input terminal for the control signal, and pin PA9 is the output terminal for the drive signal and is connected to the spraying servo 2-1'. Pin PA10 of the main control chip GD32F103C8T6 is connected to the control module of UAV 1 through a PWM signal interface and is powered by the battery of UAV 1.

[0042] like Figure 5-7 As shown, the water control component 2-5 can be applied in both of the above embodiments, including a cover plate 2-5-2, a sealing ring 2-5-6, a drain pipe connector 2-5-4, and a fastening nut 2-5-5. The upper end of the drain pipe connector 2-5-4 is located inside the spray tank 2-2, and its side is hinged to one side of the cover plate 2-5-2. A sealing ring 2-5-6 is provided between the contact surfaces of the hinged components. The middle part of the drain pipe connector 2-5-4 is fitted into the drain hole at the bottom of the spray tank 2-2. The lower part of the drain pipe connector 2-5-4 is fixed to the outside of the spray tank 2-2 after being tightened by the fastening nut 2-5-5. Based on the movable range of the cover plate 2-5-2, its vertical rotation angle or reasonable distance is calculated, and finally estimated as a suitable range for the swing angle of the spray motor 2-1, achieving fixed angle control and preventing the cover plate 2-5-2 from being damaged.

[0043] like Figure 1-4As shown, in both embodiments above, the water tank 2-2 of the water spraying device 2 includes a water injection pipe 2-4 and a pull rope positioning pipe 2-7. The water injection pipe 2-4 is located on the side of the water tank 2-2, with its opening tilted upwards and a cap at the opening. The pull rope positioning pipe 2-7 is located on the top surface of the water tank 2-2, with its opening vertically upwards and a pull rope 2-3 sleeved inside. The pull rope 2-3 is a steel wire rope or nylon rope. The water injection pipe 2-4 can be easily connected to a tap water hose, allowing the water tank 2-2 to be filled quickly. The inlet of the water injection pipe 2-4 can be capped to prevent water from overflowing. The pull rope positioning pipe 2-7, with the pull rope 2-3 sleeved inside, serves as an upper vent for the water tank 2-2. This not only prevents the pull rope 2-3 from wearing down at the upper opening of the water tank 2-2 but also effectively prevents the water inside the water tank 2-2 from being jostled out.

[0044] Since the lowest point of the water outlet of the water control component 2-5 is higher than the bottom of the water spraying tank 2-2, a drain plug 2-6 needs to be installed at the bottom of the water spraying tank 2-2. After removing the drain plug 2-6, the water inside the water spraying tank 2-2 can be drained cleanly, allowing for ventilation inside and making it easy to take and store. Otherwise, it is easy to spill water all over the ground after moving it, causing inconvenience.

[0045] In the two embodiments described above, the drone 1 is either a plug-in drone 1 or a hybrid electric drone 1. If a gasoline engine is used to drive a generator, the hybrid electric drone 1 can carry a load of 30-60 kg, which is sufficient to carry a large amount of water for rapid water spraying in the fire-fighting area.

[0046] In both of the above embodiments, the water spraying device 2 (which includes a spraying motor 2-1 and a spraying servo motor 2-1') can be controlled using buttons extended from the remote controller of the UAV 1. The water spraying tank 2-2, the spraying servo motor 2-1', or the spraying motor 2-1 can be powered by their own power supply or by the battery of the UAV 1. Figure 11 As shown, this interface is the external interface of the main control chip GD32F103C8T6. Pin 1 is the positive terminal of the 12V power supply, and pins 3 and 4 are the negative terminal GND of the power supply. The DRONE PWM SIGNAL is used to collect the PWM signal output by the UAV 1. The PWM signal output on the fixed interface of the UAV 1 is controlled by the buttons on the remote control. After the main control chip GD32F103C8T6 collects the signal, it judges it and then controls the spraying motor 2-1 or the servo motor by driving the AS4950 spraying motor driver chip.

[0047] The above description is only a preferred embodiment of the present utility model. It should be noted that 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 drone containing a fire extinguishing device, characterized in that: The device includes a drone, quick-release connectors, a spraying motor, a spraying water tank, and a circuit box. The spraying motor, circuit box, and spraying water tank are located on the underside of the drone. The spraying water tank is connected to the bracket on the underside of the drone via quick-release connectors. The spraying motor and circuit box are located on the underside of the drone. The spraying control circuit inside the circuit box receives the spraying command from the drone remote controller and controls the spraying motor to rotate. The drive handle on the output shaft of the spraying motor pulls the control water component inside the spraying water tank via a pull rope to conduct electricity. The spraying control circuit includes a main control chip GD32F103C8T6, a current-limiting resistor, and a spraying motor driver chip. In the main control chip GD32F103C8T6, pin PA10 is the input terminal for the control signal, and pins PA9 and PA8 are the output terminals for the drive signal. The drive signals are respectively connected to the input terminals of the spraying motor driver chip, and the output terminal of the spraying motor driver chip is connected to the spraying motor.

2. The drone containing a fire extinguishing device according to claim 1, characterized in that: The spraying motor drive chip is model AS4950. Its pins 2 and 3 are connected in series with resistors and then connected to pins PA9 and PA8 of the main control chip. Pins PA9 and PA8 of the main control chip output drive signals AS_IN1 and AS_IN12 respectively to control the forward and reverse rotation of the spraying motor.

3. A drone containing a fire extinguishing device, characterized in that: The device includes a drone, quick-release connectors, a spray servo, a spray water tank, and a circuit box. The spray servo, circuit box, and spray water tank are located on the underside of the drone. The spray water tank is connected to the bracket on the underside of the drone via quick-release connectors. The spray servo and circuit box are located on the underside of the drone. The spray control circuit inside the circuit box receives the spray command from the drone remote controller and controls the spray servo to rotate. The drive handle on the output shaft of the spray servo pulls the control water component inside the spray water tank via a pull rope to conduct electricity. The spray control circuit contains a main control chip GD32F103C8T6 and a current-limiting resistor. In the main control chip GD32F103C8T6, pin PA10 is the input terminal of the control signal, and pin PA9 is the output terminal of the drive signal and is connected to the spray servo.

4. The drone containing a fire extinguishing device according to claim 1 or 3, characterized in that: The water control component includes a cover plate, a sealing ring, a drain pipe connector, and a fastening nut. The upper end of the drain pipe connector is located inside the water tank, and its side is hinged to one side of the cover plate. A sealing ring is provided between the contact surfaces of the two hinged together. The middle part of the drain pipe connector is fitted into the drain hole at the bottom of the water tank. The lower part of the drain pipe connector is fixed to the outside of the water tank after being tightened by the fastening nut.

5. The drone containing a fire extinguishing device according to claim 1 or 3, characterized in that: The water tank includes a water injection pipe and a pull rope positioning pipe. The water injection pipe is located on the side of the water tank, with its opening tilted upwards and a cap provided at the opening. The pull rope positioning pipe is located on the top surface of the water tank, with its opening vertically upwards and a pull rope sleeved inside.

6. The drone containing a fire extinguishing device according to claim 1 or 3, characterized in that: The bottom of the spray tank is equipped with a drain plug.

7. The drone containing a fire extinguishing device according to claim 1 or 3, characterized in that: The drone is either a plug-in drone or a hybrid electric drone.

8. The drone containing a fire extinguishing device according to claim 1 or 3, characterized in that: The pull rope is a steel wire rope or a nylon rope.

9. The drone containing a fire extinguishing device according to claim 1 or 3, characterized in that: The main control chip GD32F103C8T6 has its PA10 pin connected to the drone control module via a PWM signal interface and is powered by the drone battery.

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