Unmanned aerial vehicle mounted environment noise detection equipment

Abstract

The invention relates to the technical field of noise detection, and discloses unmanned aerial vehicle mounted environmental noise detection equipment, which comprises an unmanned aerial vehicle main body, a plurality of propellers are arranged on the unmanned aerial vehicle main body, and an air guide arc-shaped cover matched with the propellers for use is arranged at the bottom of the unmanned aerial vehicle main body. A noise detector and a detection microphone are arranged in the air guide arc-shaped cover; a flow guide and noise reduction mechanism used for reducing noise of the detection microphone is arranged in the air guide arc-shaped cover, and the flow guide and noise reduction mechanism comprises a flow guide and noise reduction frame fixedly installed in the air guide arc-shaped cover. By arranging the air guide arc-shaped cover, the flow guide noise reduction frame, the noise detector, the detection microphone, the mounting bracket and the flow guide angle adjusting mechanism, airflow is diffused to the surrounding under the arc-shaped action of the air guide arc-shaped cover, so that the airflow is far away from the detection microphone area, and the noise of the airflow is prevented from interfering the noise detector and affecting the accuracy of a detection result.

Description

Technical Field

[0001] This invention relates to the field of noise detection technology, specifically to an environmental noise detection device mounted on a drone. Background Technology

[0002] Noise detection is the process of measuring environmental noise levels using specialized equipment and methods. It is used to assess pollution levels and support governance decisions. Relevant standards are formulated by the Ministry of Ecology and Environment. Noise detection covers the monitoring of acoustic environment quality in functional areas, regions, and road traffic, aiming to ensure a harmonious living environment. Drone noise detection technology is developed around the core needs of accurate data collection, noise analysis, and interference elimination. It covers multiple levels such as hardware acquisition, signal processing, and intelligent recognition, and must be compatible with the operational characteristics of drones and the requirements of different application scenarios.

[0003] However, common drone noise detection devices are affected by many factors. During drone flight, the airflow generated by the propeller directly impacts the microphone diaphragm, resulting in turbulent noise that masks low-frequency target noise and causes a large number of invalid spikes in the detection data. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an environmental noise detection device mounted on a drone, which solves the problem that during drone flight, the airflow generated by the propeller directly impacts the microphone diaphragm, causing turbulent noise that masks low-frequency target noise and results in a large number of invalid spikes in the detection data.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: an environmental noise detection device mounted on a drone, comprising a drone body, wherein the drone body is provided with multiple propellers, and the bottom of the drone body is provided with an air guide arc cover for use with the propellers, wherein a noise detector and a detection microphone are provided inside the air guide arc cover; The air-guiding arc-shaped cover is equipped with a flow-guiding noise reduction mechanism for reducing noise in the detection microphone. The flow-guiding noise reduction mechanism includes a flow-guiding noise reduction frame fixedly installed inside the air-guiding arc-shaped cover. The four corners of the flow-guiding noise reduction frame are provided with arc-shaped air-guiding surfaces. The flow-guiding noise reduction frame is provided with a rotating groove and a mounting bracket inside. The mounting bracket is inclinedly installed inside the rotating groove. A circular rotating rod is fixedly installed on the top of the mounting bracket. The circular rotating rod is rotatably installed inside the rotating groove. The circular rotating rod is rotatably installed in the circular groove opened inside the rotating groove. The flow guide noise reduction frame is equipped with a flow guide angle adjustment mechanism for adjusting the angles of multiple mounting brackets. The flow guide angle adjustment mechanism includes a sound insulation and noise reduction cover that slides on the flow guide noise reduction frame, and the detection microphone is fixedly installed inside the sound insulation and noise reduction cover.

[0006] Preferably, the flow guiding angle adjustment mechanism includes a supporting annular support plate fixedly installed on the outer surface of the sound insulation and noise reduction cover, a rotating push-pull rod rotatably installed on the side of the mounting bracket, the other end of the rotating push-pull rod rotatably installed on the supporting annular support plate, and a plurality of electric push rods fixedly installed at the bottom of the sound insulation and noise reduction cover, with the supporting annular support plate fixedly installed on the output end of the electric push rods.

[0007] Preferably, the mounting bracket is equipped with multiple airflow guiding ramps, and a gas flow channel is formed between the airflow guiding ramps and the mounting bracket. Multiple drain pipes are installed on the mounting bracket at the position of the airflow flow channel, and the drain pipes pass through the air guide arc cover and extend to the outside of the air guide arc cover.

[0008] Preferably, the mounting bracket has multiple layers of noise reduction and sound insulation pads inside, and these multiple layers of noise reduction and sound insulation pads are slidably and detachably installed inside the mounting bracket.

[0009] Preferably, the top of the air guide arc cover is provided with a bird-repelling protection mechanism, which includes a liquid storage tank fixedly installed on the air guide arc cover. The top of the liquid storage tank is provided with a sealing cap, and the outside of the liquid storage tank is provided with multiple atomizing spray tubes.

[0010] Preferably, an annular water flow pipe is fixedly installed on the outer surface of the liquid storage tank, the plurality of atomizing spray pipes are fixedly installed on the annular water flow pipe, a delivery pump is fixedly installed on the side of the liquid storage tank, the inlet pipe of the delivery pump penetrates the outer wall of the liquid storage tank and extends to below the liquid level inside the liquid storage tank, and the outlet pipe of the delivery pump is fixedly connected to the inlet of the annular water flow pipe.

[0011] Preferably, the surface of the air guide arc cover is provided with a backup energy storage mechanism. The backup energy storage mechanism includes a telescopic guide rod fixedly installed on the air guide arc cover, and a movable plate is installed on the top of the telescopic guide rod. An elastic element is installed between the air guide arc cover and the movable plate. A mounting base is fixed on the movable plate. A magnetic block is installed on the surface of the mounting base. A protective shell is installed on the main body of the drone, and a coil that cooperates with the magnetic block is fixed inside the protective shell.

[0012] Preferably, a rectifier bridge is fixedly installed inside the protective shell on the main body of the drone, and a voltage stabilizing module that works in conjunction with the rectifier bridge is installed inside the protective shell on the air guide arc cover, and a battery inverter is installed inside the protective shell on the air guide arc cover.

[0013] Preferably, a mounting support plate is fixedly installed at the bottom of the main shell of the drone, and a plurality of spring shock absorbers are fixedly installed at the bottom of the mounting support plate, with the other end of the spring shock absorbers fixedly installed on the air guide arc cover.

[0014] Preferably, a noise reduction mesh cover is detachably installed at the bottom of the sound insulation and noise reduction cover, and the noise reduction mesh cover is configured as a flat mesh.

[0015] Working principle: During the drone's flight, the noise detector is controlled to detect the noise in the area to be tested. The noise reduction mesh cover can reduce airflow interference and ensure sound wave acquisition. It has a simple structure and light weight, and will not increase the main load of the drone. It is set as a flat mesh, which can decompose the airflow, allowing ground noise to penetrate the mesh vertically and be collected by the equipment. The wind guide arc cover can guide and block the airflow generated by the propeller rotation when the drone is in flight. Under the arc action of the wind guide arc cover, the airflow is diffused to the surroundings, keeping the airflow away from the detection microphone area and avoiding the noise of the airflow from interfering with the noise detector. The tilted mounting bracket can guide the airflow around the drone during flight, directing it away from the detection microphone and further reducing interference from external airflow. When encountering airflows of different directions, the electric push rod is activated, which drives the supporting ring plate to move up and down. During the up and down movement of the supporting ring plate, the sound insulation and noise reduction cover moves synchronously. As the supporting ring plate moves, the rotating push rod moves along with it and rotates. As the rotating push rod moves, it pushes the mounting bracket to rotate, thereby adjusting the angle of the mounting bracket. This is used to deal with different wind directions encountered by the drone during flight and effectively reduce the impact of airflow. The airflow guide block and the mounting bracket form a gas flow channel, which guides and transports the airflow that comes into contact with the mounting bracket. The airflow that comes into contact with the mounting bracket during flight enters the liquid drain pipe through the airflow channel and is then discharged through the liquid drain pipe, effectively reducing the impact of the gas. The noise reduction and sound insulation pad can further buffer the remaining airflow and further reduce noise interference. By adding liquid medicine into the storage tank and using a delivery pump to extract the liquid medicine, the liquid medicine enters the annular water flow pipe and is then sprayed out through the atomizing spray pipe, achieving all-round spraying of medicine. This can drive away birds and animals from the outside, preventing them from approaching the drone body and colliding with the propeller, thus affecting the drone's flight and avoiding harm to birds and animals, thereby improving the safety of use. During the flight of the drone, the moving plate will vibrate due to wind or the flight of the fuselage. The vibration of the moving plate will cause the magnetic block to move up and down synchronously through the movement of the mounting base, cutting the magnetic field lines to generate current. The current is rectified and stabilized by the rectifier bridge and voltage regulator module, and then works with the inverter and battery to store and utilize the current.

[0016] This invention provides an environmental noise detection device mounted on a drone. It has the following advantages: 1. This invention, by setting up an air-guiding arc cover, a flow-guiding noise reduction frame, a noise detector, a detection microphone, a mounting bracket, and a flow-guiding angle adjustment mechanism, utilizes the air-guiding arc cover to guide and block the airflow generated by the propeller rotation during the flight of the UAV. The arc shape of the air-guiding arc cover causes the airflow to diffuse to the surroundings, keeping the airflow away from the detection microphone area, thus avoiding the noise of the airflow from interfering with the noise detector and affecting the accuracy of the detection results.

[0017] 2. This invention utilizes a supporting annular support plate, a rotating push-pull rod, and an electric push rod. The electric push rod drives the supporting annular support plate to move up and down. During this movement, the sound insulation and noise reduction cover moves synchronously. The movement of the supporting annular support plate also drives the rotating push-pull rod to rotate, which in turn pushes the mounting bracket to rotate. This allows for angle adjustment of the mounting bracket, effectively reducing the impact of airflow and broadening its applicability to different wind conditions encountered by the drone during flight.

[0018] 3. This invention utilizes an airflow guiding ramp, a drain pipe, and a noise reduction and sound insulation pad to form a gas flow channel between the airflow guiding ramp and the mounting bracket. This channel guides and transports the airflow that comes into contact with the mounting bracket, allowing the airflow encountered during flight to enter the drain pipe through the airflow channel and then be discharged through the drain pipe. This effectively reduces the impact of the gas. At the same time, the noise reduction and sound insulation pad further buffers the remaining airflow, further reducing noise interference.

[0019] 4. This invention, by setting up a liquid storage tank, an annular water flow pipe, an atomizing spray pipe, and a delivery pump, allows for the addition of medicine to the storage tank. The delivery pump then draws out the medicine, which enters the annular water flow pipe and is subsequently sprayed out through the atomizing spray pipe. This achieves omnidirectional spraying of medicine, effectively repelling birds and animals from approaching the drone and colliding with the propeller, thus preventing them from affecting the drone's flight and avoiding harm to birds and animals, thereby improving safety during use.

[0020] 5. This invention, by setting up a telescopic guide rod, a movable plate, an elastic element, a mounting base, a rectifier bridge, a voltage regulator module, a magnetic block, and a coil, allows the movable plate to vibrate during the flight of the UAV, which is subject to wind or other forces. This vibration causes the magnetic block to move up and down synchronously through the mounting base, cutting magnetic lines of force to generate current. The current is then rectified and stabilized by the rectifier bridge and voltage regulator module, and then used in conjunction with the inverter and battery to store and utilize the current. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention from another angle; Figure 3 This is a schematic diagram of the air guide arc cover structure of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the air guide arc cover of the present invention from another angle; Figure 5 This is a schematic diagram of the sound insulation and noise reduction cover structure of the present invention; Figure 6 This is a schematic diagram of the drain pipe structure of the present invention; Figure 7 This is a schematic diagram of the flow guide angle adjustment mechanism of the present invention; Figure 8 This is a schematic cross-sectional view of the flow-guiding and noise-reducing frame of the present invention; Figure 9 This is a schematic diagram of the bird deterrent and protective mechanism of the present invention; Figure 10 This is a schematic diagram of the backup energy storage mechanism of the present invention.

[0022] 1. Drone body; 2. Wind-guiding arc-shaped cover; 3. Airflow guiding and noise reduction mechanism; 301. Airflow guiding and noise reduction frame; 302. Mounting bracket; 303. Airflow guiding inclined block; 304. Drainage and liquid guiding pipe; 305. Noise reduction and sound insulation pad; 306. Circular rotating rod; 4. Spring shock absorber; 5. Mounting support plate; 6. Airflow angle adjustment mechanism; 601. Sound insulation and noise reduction cover; 602. Rotating push-pull rod; 603. Electric push rod; 604. Support ring plate; 605. Noise reduction mesh cover; 7. Bird deterrent and noise reduction device. 701. Protective mechanism; 702. Liquid storage tank; 703. Annular water flow pipe; 704. Atomizing spray pipe; 705. Delivery pump; 706. Sealing plug; 8. Backup energy storage mechanism; 807. Moving plate; 808. Telescopic guide rod; 809. Elastic component 1; 8000. Mounting base; 801. Magnetic block; 8001. Coil; 8002. Rectifier bridge; 801. Voltage regulator module; 802. Battery; 813. Inverter; 9. Noise detector; 10. Detection microphone; 11. Propeller. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] Please see the appendix Figure 1 -Appendix Figure 3 This invention provides an environmental noise detection device mounted on a drone, including a drone body 1, a plurality of propellers 11 on the drone body 1, and a wind-guiding arc cover 2 at the bottom of the drone body 1 for use with the propellers 11. The wind-guiding arc cover 2 is equipped with a noise detector 9 and a detection microphone 10 inside. The air-guiding arc cover 2 is equipped with an air-guiding noise reduction mechanism 3 for noise reduction of the detection microphone 10. The air-guiding noise reduction mechanism 3 includes an air-guiding noise reduction frame 301 fixedly installed inside the air-guiding arc cover 2. The air-guiding noise reduction frame 301 has arc-shaped air-guiding surfaces at its four corners. The air-guiding noise reduction frame 301 has a rotating groove and a mounting bracket 302 inside. The mounting bracket 302 is inclinedly installed inside the rotating groove. A circular rotating rod 306 is fixedly installed on the top of the mounting bracket 302. The circular rotating rod 306 is rotatably installed inside the rotating groove. The circular rotating rod 306 is rotatably installed in the circular groove opened inside the rotating groove. The flow guide noise reduction frame 301 is equipped with a flow guide angle adjustment mechanism 6 for adjusting the angles of multiple mounting brackets 302. The flow guide angle adjustment mechanism 6 includes a sound insulation and noise reduction cover 601 that slides on the flow guide noise reduction frame 301, and the detection microphone 10 is fixedly installed inside the sound insulation and noise reduction cover 601.

[0025] By setting up an air guide arc cover 2, a flow-guiding noise reduction frame 301, a noise detector 9, a detection microphone 10, a mounting bracket 302, and a flow-guiding angle adjustment mechanism 6, the air guide arc cover 2 can guide and block the airflow generated by the rotation of the propeller 11 when the UAV body 1 is in flight. The arc shape of the air guide arc cover 2 makes the airflow diffuse to the surroundings, keeping the airflow away from the detection microphone 10 area, thus avoiding the noise of the airflow from interfering with the noise detector 9 and affecting the accuracy of the detection results. Furthermore, the angle adjustment mechanism 6 can be used to adjust the angle between multiple mounting brackets 302. The mounting brackets 302 are tilted so that during the flight of the UAV body 1, the mounting brackets 302 can guide the airflow generated around the UAV body 1, guide the airflow to other places, and make the airflow away from the position of the detection microphone 10, thereby further reducing the interference of external airflow.

[0026] For details, please refer to the appendix. Figure 4 Appendix Figure 5 and attached Figure 8 The flow angle adjustment mechanism 6 includes a supporting annular support plate 604 fixedly installed on the outer surface of the sound insulation and noise reduction cover 601. A rotating push-pull rod 602 is rotatably installed on the side of the mounting bracket 302. The other end of the rotating push-pull rod 602 is rotatably installed on the supporting annular support plate 604. Several electric push rods 603 are fixedly installed at the bottom of the sound insulation and noise reduction cover 601. The supporting annular support plate 604 is fixedly installed on the output end of the electric push rods 603.

[0027] By setting up a supporting ring plate 604, a rotating push-pull rod 602, and an electric push rod 603, the electric push rod 603 drives the supporting ring plate 604 to move up and down. During the up and down movement of the supporting ring plate 604, the sound insulation and noise reduction cover 601 moves synchronously. During the movement of the supporting ring plate 604, the rotating push-pull rod 602 moves along with it and rotates. As the rotating push-pull rod 602 moves, it pushes the mounting bracket 302 to rotate, thereby realizing the angle adjustment of the mounting bracket 302. This is used to deal with different wind directions faced by the UAV body 1 during flight, effectively reducing the impact of airflow and improving the applicability.

[0028] For details, please refer to the appendix. Figure 6 and attached Figure 7 Multiple airflow guiding inclined blocks 303 are installed on the mounting bracket 302, forming a gas flow channel between the airflow guiding inclined blocks 303 and the mounting bracket 302. Multiple drain liquid guide pipes 304 are installed on the mounting bracket 302 at the position of the airflow flow channel. The drain liquid guide pipes 304 pass through the air guide arc cover 2 and extend to the outside of the air guide arc cover 2. Multiple layers of noise reduction and sound insulation pads 305 are provided inside the mounting bracket 302. The multiple layers of noise reduction and sound insulation pads 305 are slidably and detachably installed inside the mounting bracket 302.

[0029] By setting up an airflow guiding ramp 303, a drain pipe, and a noise reduction and sound insulation pad 305, a gas flow channel is formed between the airflow guiding ramp 303 and the mounting bracket 302. This guides and transports the airflow that comes into contact with the mounting bracket, allowing the airflow that comes into contact with the bracket during flight to enter the drain pipe through the airflow channel and then be discharged through the drain pipe. This effectively reduces the impact of the gas. At the same time, by setting up the noise reduction and sound insulation pad 305, the remaining airflow can be further buffered, further reducing noise interference.

[0030] For details, please refer to the appendix. Figure 9The top of the air guide arc cover 2 is provided with a bird deterrent protection mechanism 7. The bird deterrent protection mechanism 7 includes a liquid storage tank 701 fixedly installed on the air guide arc cover 2. The top of the liquid storage tank 701 is provided with a sealing plug 705, and the outside of the liquid storage tank 701 is provided with multiple atomizing spray pipes 703. An annular water flow pipe 702 is fixedly installed on the outer surface of the liquid storage tank 701. The multiple atomizing spray pipes 703 are fixedly installed on the annular water flow pipe 702. A liquid delivery pump 704 is fixedly installed on the side of the liquid storage tank 701. The liquid inlet pipe of the liquid delivery pump 704 penetrates the outer wall of the liquid storage tank 701 and extends to below the liquid level inside the liquid storage tank 701. The liquid outlet pipe of the liquid delivery pump 704 is fixedly connected to the liquid inlet of the annular water flow pipe 702.

[0031] By setting up a liquid storage tank 701, an annular water flow pipe 702, an atomizing spray pipe 703, and a delivery pump 704, liquid medicine is added inside the liquid storage tank 701, and the delivery pump 704 can extract the liquid medicine inside, allowing it to enter the annular water flow pipe 702, and then spray it out through the atomizing spray pipe 703, achieving all-round spraying of medicine. This can drive away birds and animals from the outside, preventing them from approaching the drone body 1 and colliding with the propeller 11, thus affecting the flight of the drone body 1, and also preventing harm to birds and animals, thereby improving the safety of use.

[0032] For details, please refer to the appendix. Figure 10 The surface of the air guide arc cover 2 is provided with a backup energy storage mechanism 8. The backup energy storage mechanism 8 includes a telescopic guide rod 802 fixedly installed on the air guide arc cover 2, and a movable plate 801 is installed on the top of the telescopic guide rod 802. An elastic element 803 is installed between the air guide arc cover 2 and the movable plate 801. A mounting base 804 is fixed on the movable plate 801. A magnetic block 805 is installed on the surface of the mounting base 804. A protective shell is installed on the drone body 1, and a coil 806 that works with the magnetic block 805 is fixed inside the protective shell. A rectifier bridge 807 is fixedly installed inside the protective shell on the drone body 1. A voltage regulator module 808 that works with the rectifier bridge 807 is installed inside the protective shell on the air guide arc cover 2. A battery 809 and an inverter 810 are installed inside the protective shell on the air guide arc cover 2.

[0033] By setting up a telescopic guide rod 802, a movable plate 801, an elastic element 803, a mounting base 804, a rectifier bridge 807, a voltage regulator module 808, a magnetic block 805, and a coil 806, the movable plate 801 will vibrate to a certain extent during the flight of the UAV body 1 due to wind or the flight of the fuselage. The vibration of the movable plate 801 will drive the magnetic block 805 to move up and down synchronously through the movement of the mounting base 804, cutting the magnetic field lines to generate current. The current is then rectified and stabilized by the rectifier bridge 807 and the voltage regulator module 808, and then cooperates with the inverter 810 and the battery 809 to store and utilize the current.

[0034] For details, please refer to the appendix. Figure 3 A mounting support plate 5 is fixedly installed on the bottom of the main body shell 1 of the drone. Several spring shock absorbers 4 are fixedly installed on the bottom of the mounting support plate 5. The other end of the spring shock absorber 4 is fixedly installed on the air guide arc cover 2.

[0035] By setting up spring dampers 4, the impact of the drone body vibration on the air guide arc cover 2 during the flight of the drone body 1 is reduced, thereby reducing the noise interference caused by the vibration of the drone body 1.

[0036] For details, please refer to the appendix. Figure 2 The bottom of the sound insulation and noise reduction cover 601 is detachably equipped with a noise reduction mesh cover 605, which is set as a flat mesh.

[0037] By setting up a noise reduction mesh cover 605, airflow interference can be reduced and sound wave acquisition can be guaranteed. The structure is simple and lightweight, which will not increase the load of the main body of the UAV 1. It is set as a flat mesh, which can decompose the airflow and allow ground noise to penetrate the mesh vertically and be collected by the equipment.

[0038] Working principle: During the flight of the main body 1 of the drone, the noise detector 9 is controlled to detect the noise in the area to be detected. The noise reduction mesh cover 605 can reduce airflow interference and ensure sound wave acquisition. It has a simple structure and light weight, and will not increase the load of the main body 1 of the drone too much. It is set as a flat mesh, which can decompose the airflow and allow ground noise to penetrate the mesh vertically and be collected by the equipment. The wind guide arc cover 2 can guide and block the airflow generated by the rotation of the propeller 11 when the main body 1 of the drone is in flight. Under the arc action of the wind guide arc cover 2, the airflow is diffused to the surroundings, and the airflow is kept away from the detection microphone 10 area to avoid the noise of the airflow interfering with the noise detector 9. The mounting bracket 302 is tilted so that during the flight of the drone body 1, the mounting bracket 302 can guide the airflow generated around the drone body 1, guide the airflow to other places, and keep the airflow away from the position of the detection microphone 10, thereby further reducing the interference of external airflow. When encountering airflows with different wind directions, the electric push rod 603 is activated, driving the supporting ring plate 604 to move up and down. During the up and down movement of the supporting ring plate 604, the sound insulation and noise reduction cover 601 moves synchronously. During the movement of the supporting ring plate 604, the rotating push rod 602 moves along with it and rotates. As the rotating push rod 602 moves, it pushes the mounting bracket 302 to rotate, thereby adjusting the angle of the mounting bracket 302 to cope with different wind directions encountered by the UAV body 1 during flight and effectively reduce the impact of airflow. A gas flow channel is formed between the airflow guide block 303 and the mounting bracket 302, which guides and transports the airflow that comes into contact with the mounting bracket. The airflow that comes into contact with the mounting bracket during flight enters the liquid drain pipe through the airflow channel and is then discharged through the liquid drain pipe, effectively reducing the impact of the gas. The noise reduction and sound insulation pad 305 can further buffer the remaining airflow and further reduce noise interference. The liquid medicine is added into the storage tank 701 and pumped out by the delivery pump 704. The liquid medicine enters the annular water pipe 702 and is then sprayed out through the atomizing spray pipe 703 to achieve all-round spraying of medicine. This can drive away birds and animals from the outside, prevent them from approaching the main body 1 of the drone and colliding with the propeller 11, thus affecting the flight of the main body 1 of the drone and avoiding harm to birds and animals, thereby improving the safety of use. During the flight of the main body 1 of the drone, the moving plate 801 will vibrate due to wind or the flight of the fuselage. The vibration of the moving plate 801 will cause the magnetic block 805 to move up and down synchronously through the installation and fixing base 804, cutting the magnetic field lines to generate current. The current is rectified and stabilized by the rectifier bridge 807 and the voltage regulator module 808, and then cooperates with the inverter 810 and the battery 809 to store and utilize the current.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An environmental noise detection device mounted on a drone, characterized in that... The drone body (1) includes a drone body (1) with multiple propellers (11) on it. The bottom of the drone body (1) is provided with a wind-guiding arc cover (2) that works with the propellers (11). The wind-guiding arc cover (2) is provided with a noise detector (9) and a detection microphone (10) inside. The air-guiding arc cover (2) is provided with an air-guiding noise reduction mechanism (3) for noise reduction of the detection microphone (10). The air-guiding noise reduction mechanism (3) includes an air-guiding noise reduction frame (301) fixedly installed inside the air-guiding arc cover (2). The air-guiding noise reduction frame (301) has an arc-shaped air-guiding surface at each of its four corners. The air-guiding noise reduction frame (301) is provided with a rotating groove and a mounting bracket (302) inside. The mounting bracket (302) is inclined inside the rotating groove. A circular rotating rod (306) is fixedly installed on the top of the mounting bracket (302). The circular rotating rod (306) is rotatably installed inside the rotating groove. The circular rotating rod (306) is rotatably installed in the circular groove opened inside the rotating groove. The flow guide noise reduction frame (301) is provided with a flow guide angle adjustment mechanism (6) for adjusting the angle of multiple mounting brackets (302). The flow guide angle adjustment mechanism (6) includes a sound insulation noise reduction cover (601) that slides on the flow guide noise reduction frame (301). The detection microphone (10) is fixedly installed inside the sound insulation noise reduction cover (601).

2. The UAV-mounted environmental noise detection device according to claim 1, characterized in that: The flow guide angle adjustment mechanism (6) includes a supporting annular support plate (604) fixedly installed on the outer surface of the sound insulation and noise reduction cover (601). A rotating push-pull rod (602) is rotatably installed on the side of the mounting bracket (302). The other end of the rotating push-pull rod (602) is rotatably installed on the supporting annular support plate (604). Several electric push rods (603) are fixedly installed at the bottom of the sound insulation and noise reduction cover (601). The supporting annular support plate (604) is fixedly installed on the output end of the electric push rods (603).

3. The UAV-mounted environmental noise detection device according to claim 1, characterized in that: Multiple airflow guide ramps (303) are installed on the mounting bracket (302). A gas flow channel is formed between the airflow guide ramps (303) and the mounting bracket (302). Multiple drain pipes (304) are installed on the mounting bracket (302) at the position of the airflow channel. The drain pipes (304) penetrate the air guide arc cover (2) and extend to the outside of the air guide arc cover (2).

4. The UAV-mounted environmental noise detection device according to claim 3, characterized in that: The mounting bracket (302) is provided with multiple layers of noise reduction and sound insulation pads (305) inside, and the multiple layers of noise reduction and sound insulation pads (305) are slidably and detachably installed inside the mounting bracket (302).

5. The UAV-mounted environmental noise detection device according to claim 1, characterized in that: The top of the air guide arc cover (2) is provided with a bird deterrent protection mechanism (7). The bird deterrent protection mechanism (7) includes a liquid storage tank (701) fixedly installed on the air guide arc cover (2). The top of the liquid storage tank (701) is provided with a sealing plug (705), and the outside of the liquid storage tank (701) is provided with multiple atomizing spray pipes (703).

6. The UAV-mounted environmental noise detection device according to claim 5, characterized in that: An annular water flow pipe (702) is fixedly installed on the outer surface of the liquid storage tank (701). The plurality of atomizing spray pipes (703) are fixedly installed on the annular water flow pipe (702). A delivery pump (704) is fixedly installed on the side of the liquid storage tank (701). The inlet pipe of the delivery pump (704) penetrates the outer wall of the liquid storage tank (701) and extends to below the liquid level inside the liquid storage tank (701). The outlet pipe of the delivery pump (704) is fixedly connected to the inlet of the annular water flow pipe (702).

7. The UAV-mounted environmental noise detection device according to claim 1, characterized in that: The surface of the air guide arc cover (2) is provided with a backup energy storage mechanism (8). The backup energy storage mechanism (8) includes a telescopic guide rod (802) fixedly installed on the air guide arc cover (2). A movable plate (801) is installed on the top of the telescopic guide rod (802). An elastic element (803) is installed between the air guide arc cover (2) and the movable plate (801). A mounting base (804) is fixed on the movable plate (801). A magnetic block (805) is installed on the surface of the mounting base (804). A protective shell is installed on the main body of the drone (1), and a coil (806) that cooperates with the magnetic block (805) is fixed inside the protective shell.

8. The UAV-mounted environmental noise detection device according to claim 7, characterized in that: A rectifier bridge (807) is fixedly installed inside the protective shell on the main body (1) of the drone, and a voltage regulator module (808) that works in conjunction with the rectifier bridge (807) is installed inside the protective shell on the air guide arc cover (2), and a battery inverter (810) is installed inside the protective shell on the air guide arc cover (2).

9. The UAV-mounted environmental noise detection device according to claim 1, characterized in that: The bottom of the shell of the drone body (1) is fixedly installed with a mounting support plate (5), and a number of spring shock absorbers (4) are fixedly installed on the bottom of the mounting support plate (5). The other end of the spring shock absorber (4) is fixedly installed on the air guide arc cover (2).

10. The UAV-mounted environmental noise detection device according to claim 1, characterized in that: The bottom of the sound insulation and noise reduction cover (601) is detachably equipped with a noise reduction mesh cover (605), which is configured as a flat mesh.

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