An exhaust gas pollution monitoring device and method thereof

Abstract

The present invention discloses an exhaust gas pollution monitoring device and a method thereof, relating to the technical field of gas pollution monitoring; it includes: a drone main body, a plurality of arms are arranged on the side of the drone main body, and propeller mechanisms are installed at the ends of the arms; a gas detection mechanism is arranged at the bottom of the drone main body. By setting the gas detection mechanism, the present invention can use the gas detection sensor module to detect gas. When further detection is required at a certain place, the lifting control component can be used to control the lifting frame to descend, so that the elastic folding cylinder unfolds. Based on the operation of the air extraction fan, the air at the bottom of the elastic folding cylinder is pumped upward, and then detected by the gas detection sensor module; this method is suitable for precise detection of local positions and can adapt to relatively narrow environments, such as detecting possible leakage points, etc., and a certain safety distance is maintained between the drone main body and the detection position, improving safety.

Description

Technical Field

[0001] The present invention relates to the technical field of gas pollution monitoring, and particularly to an emission gas pollution monitoring device and a method thereof. Background Art

[0002] Traditional gas pollution monitoring methods mainly rely on fixed monitoring stations, which are usually installed at specific locations. Although they can conduct long-term monitoring of specific areas, there are many limitations. On the one hand, their monitoring range is relatively fixed. For some large-scale factory areas or complex terrain areas, it is impossible to achieve full coverage, and there are easily monitoring blind spots. On the other hand, in the face of some temporary gas leakage incidents, especially those occurring in remote or inaccessible areas, fixed monitoring stations often cannot obtain accurate information in a timely manner, resulting in the timeliness and effectiveness of monitoring being affected.

[0003] In recent years, the rapid development of unmanned aerial vehicle (UAV) technology has provided new solutions for gas pollution monitoring. UAVs have the advantages of strong mobility, high flexibility, and the ability to quickly reach the target area, and can achieve rapid inspection and monitoring of large areas. However, most existing UAV gas monitoring devices can only conduct relatively macroscopic monitoring of gas concentration distribution. For some local positions, especially narrow spaces or areas where leakage points may exist and precise detection is required, the monitoring effect is not ideal.

[0004] After retrieval, the application solution with the Chinese patent application number CN201922388648.1 discloses a multi-rotor UAV equipped with a gas detector, which relates to the technical field of UAVs, including a UAV, a connecting device, a gas detector, and air vents. The bottom of the UAV is fixedly connected to the top of the connecting device, the bottom of the connecting device is fixedly connected to the top of the gas detector, and air vents are provided on the outer wall of the gas detector. The multi-rotor UAV in the above literature has the following deficiencies: Although it can perform the detection function, it cannot effectively detect local positions while maintaining a certain safety distance, and the limitations of detection are relatively large. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose an emission gas pollution monitoring device and a method thereof.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An emission gas pollution monitoring device includes: a UAV main body, a plurality of arms are arranged on the side of the UAV main body, and propeller mechanisms are installed at the ends of the arms; a gas detection mechanism is arranged at the bottom of the UAV main body, and the gas detection mechanism includes:

[0008] Mounting base, the mounting base is installed at the bottom of the UAV body, and a gas detection sensor module is installed at the bottom of the mounting base;

[0009] Annular installation chamber, the annular installation chamber is installed at the bottom of the UAV body through a bracket, the top end of the annular installation chamber is located below the gas detection sensor module, and an exhaust fan is installed on the inner side of the middle of the annular installation chamber;

[0010] Elastic folding cylinder, the elastic folding cylinder is installed at the bottom end of the annular installation chamber, a lifting frame is installed at the bottom end of the elastic folding cylinder, and evenly distributed annular wrinkles are provided on the elastic folding cylinder;

[0011] Lifting control component, the lifting control component is installed at the bottom of the UAV body, and is used to control the lifting of the lifting frame, so as to adjust the length of the elastic folding cylinder.

[0012] As a preferred embodiment of the present invention: The lifting control component includes:

[0013] Mounting frame, the mounting frame is installed at the bottom of the UAV body;

[0014] Winding wheel, the winding wheel is rotatably installed on the mounting frame through a shaft;

[0015] Winding and unwinding motor, the winding and unwinding motor is installed on the outer wall of one side of the mounting frame, and the output end of the winding and unwinding motor is in transmission connection with the shaft of the winding wheel;

[0016] Traction rope, one end of the traction rope is fixed on the lifting frame, and the other end of the traction rope is wound on the winding wheel.

[0017] As a preferred embodiment of the present invention: Ball seats are provided on the bottom of the lifting frame in a circumferential distribution, and gravity balls are movably installed in the ball seats.

[0018] As a preferred embodiment of the present invention: A camera module is installed at the bottom of the UAV body, a landing gear is installed at the bottom of the UAV body, and when the traction rope is in a wound state, the bottom of the gravity ball is higher than the bottom of the landing gear.

[0019] As a preferred embodiment of the present invention: A protective cage is installed at the bottom of the mounting base, and the gas detection sensor module is located inside the protective cage.

[0020] As a preferred embodiment of the present invention: A liquid tank is installed on the UAV body, a first pump body is installed on the UAV body through a bracket, one end of the first pump body is connected to the inside of the liquid tank through a pipeline, the other end of the first pump body is connected to a connector through a delivery pipe, the connector is fixed in the annular installation chamber, and a spray head is provided on one side of the connector; A fixed buckle is provided at the bottom of the UAV body, and the delivery pipe is fixed in the fixed buckle.

[0021] As a preferred embodiment of the present invention: A guide rod is fixed to the bottom of the exhaust fan. A cleaning frame is slidably connected to the outside of the guide rod. A uniformly distributed cleaning brush is provided on the side of the cleaning frame close to the exhaust fan. The cleaning frame and the guide rod are connected by a spring. Without external force, the cleaning brush does not contact the exhaust fan.

[0022] An elastic liquid bag is provided at the top of the connection head. The elastic liquid bag is communicated with the inside of the connection head. The inner diameter of the end of the nozzle is smaller than the inner diameter of the delivery pipe. When the first pump body works to supply liquid, the liquid fills the connection head and causes the elastic liquid bag to expand upward, pushing up the cleaning frame so that the cleaning brush contacts the blades of the exhaust fan.

[0023] As a preferred embodiment of the present invention: A liquid box is fixed to the machine arm. A second pump body is installed on the UAV main body through a bracket. One end of the second pump body is connected to the inside of the liquid tank through a pipeline, and the other end of the second pump body is communicated with the bottom of the liquid box through a connecting pipe. Both the first pump body and the second pump body are connected to the control module of the UAV main body.

[0024] As a preferred embodiment of the present invention: A plurality of partition plates are installed on the inner wall of the bottom of the liquid box. Openings are provided at the bottoms of the partition plates. One-way baffles are hingedly installed on the side of the partition plates close to the UAV main body through shafts and clockwork springs. The one-way baffles conduct one-way closure of the openings.

[0025] As a preferred embodiment of the present invention: The monitoring method of the monitoring device includes the following steps:

[0026] S1: Control the UAV main body to fly above the position to be measured;

[0027] S2: Drive the take-up wheel to unwind by operating the take-up and pay-off motor;

[0028] S3: After the lifting frame descends to the designated position, the take-up and pay-off motor stops working;

[0029] S4: The exhaust fan works to pump gas through the elastic folding cylinder;

[0030] S5: The gas detection sensor module collects data in real time;

[0031] S6: After the data collection is completed, the exhaust fan stops working;

[0032] S7: The take-up and pay-off motor works to drive the structure to wind up and reset.

[0033] The beneficial effects of the present invention are:

[0034] 1. The present invention can detect gases by means of a gas detection mechanism using a gas detection sensor module. When further detection is required at a certain location, the lifting control component can be used to control the lowering of the lifting frame, so that the elastic folding cylinder unfolds. Based on the operation of the exhaust fan, the air at the bottom of the elastic folding cylinder is pumped upward, and then detected by the gas detection sensor module. This method is suitable for precise detection of local positions and can adapt to relatively narrow environments, such as detecting possible leakage points, etc. Moreover, the UAV body maintains a certain safety distance from the detection position, improving safety.

[0035] 2. By setting the lifting control component, the present invention can drive the winding wheel to wind and unwind based on the operation of the winding and unwinding motor, and then control the lifting of the lifting frame to achieve the purpose of controlling the expansion and contraction of the elastic folding cylinder. By setting the ball seat and the gravity ball, the elastic folding cylinder can be stretched more stably, and the structural stability is improved to a certain extent.

[0036] 3. By setting structures such as nozzles, the present invention can pump the liquid in the liquid tank through the nozzle and output it to the annular installation chamber based on the operation of the first pump body to achieve the function of flushing and cleaning. By setting structures such as cleaning brushes and elastic liquid sacs, during normal use, since the cleaning brushes do not contact the exhaust fan, the interference with the operation of the exhaust fan is avoided. When cleaning is required, based on the operation of the first pump body to supply liquid, the liquid fills the connector and causes the elastic liquid sac to expand upward, lifting the cleaning frame and making the cleaning brushes contact the blades of the exhaust fan. The exhaust fan operates at a low power, and the cleaning brushes are used to brush and clean the blades, improving the cleaning effect.

[0037] 4. By setting structures such as the second pump body and the liquid box, the present invention can pump the liquid between the liquid box and the liquid tank based on the operation of the second pump body, so as to better balance the center of gravity and ensure the structural stability. By setting the partition plate and the one-way baffle, when feeding liquid into the liquid box, the liquid is closer to the UAV body when it is just fed in, and then flows over the partition plate to the next area when the liquid level rises to a certain extent, reducing the sensitivity of the center of gravity adjustment to a certain extent and improving the controllability. When pumping the liquid out of the liquid box, the liquid can flow toward the UAV body side through the opening of the partition plate to meet the liquid pumping requirement. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic structural diagram of an exhaust gas pollution monitoring device proposed by the present invention;

[0039] Figure 2 is a schematic structural diagram of the bottom of the exhaust gas pollution monitoring device proposed by the present invention after removing the landing gear;

[0040] Figure 3Schematic structural diagram of the elastic folding cylinder and the winding and unwinding assembly of an exhaust gas pollution monitoring device proposed by the present invention;

[0041] Figure 4 Schematic structural diagram of the annular installation chamber and the cross-section of the elastic folding cylinder of an exhaust gas pollution monitoring device proposed by the present invention;

[0042] Figure 5 Schematic structural diagram of the cleaning rack and the connector of an exhaust gas pollution monitoring device proposed by the present invention;

[0043] Figure 6 Schematic cross-sectional view of the liquid box of an exhaust gas pollution monitoring device proposed by the present invention.

[0044] In the figure: 1 UAV main body, 2 conveying pipe, 3 landing gear, 4 arm, 5 liquid box, 6 liquid tank, 7 first pump body, 8 second pump body, 9 winding wheel, 10 lifting frame, 11 elastic folding cylinder, 12 towing rope, 13 camera module, 14 annular installation chamber, 15 mounting seat, 16 winding and unwinding motor, 17 mounting frame, 18 fixing buckle, 19 protective cage, 20 gas detection sensor module, 21 exhaust fan, 22 cleaning rack, 23 ball seat, 24 connector, 25 cleaning brush, 26 spring, 27 guide rod, 28 elastic liquid bag, 29 nozzle, 30 partition board, 31 one-way baffle, 32 connecting pipe, 33 gravity ball. Detailed implementation manners

[0045] The technical solutions of the present invention will be further described in detail below in conjunction with the specific implementation manners.

[0046] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0047] Embodiment 1: An exhaust gas pollution monitoring device, as Figures 1-6 shown, includes: a UAV main body 1, on the side of the UAV main body 1, a plurality of arms 4 are provided, and a propeller mechanism is installed at the end of the arm 4; a gas detection mechanism is provided at the bottom of the UAV main body 1, and the gas detection mechanism includes:

[0048] a mounting seat 15, the mounting seat 15 is installed at the bottom of the UAV main body 1, and a gas detection sensor module 20 is installed at the bottom of the mounting seat 15;

[0049] Annular installation chamber 14, the annular installation chamber 14 is installed on the bottom of the UAV body 1 through a bracket. The top end of the annular installation chamber 14 is located below the gas detection sensor module 20, and an exhaust fan 21 is installed on the inner side of the middle part of the annular installation chamber 14;

[0050] Elastic folding cylinder 11, the elastic folding cylinder 11 is installed at the bottom end of the annular installation chamber 14. A lifting frame 10 is installed at the bottom end of the elastic folding cylinder 11, and evenly distributed annular wrinkles are provided on the elastic folding cylinder 11;

[0051] Lifting control component, the lifting control component is installed on the bottom of the UAV body 1 and is used to control the lifting of the lifting frame 10, so as to adjust the length of the elastic folding cylinder 11;

[0052] By setting up the gas detection mechanism, the gas detection sensor module 20 can be used for gas detection. When further detection is required at a certain place, the lifting control component can be used to control the lowering of the lifting frame 10, so that the elastic folding cylinder 11 unfolds. Based on the operation of the exhaust fan 21, the air at the bottom end of the elastic folding cylinder 11 is pumped upward, and then detected through the gas detection sensor module 20; this method is suitable for precise detection of local positions and can adapt to relatively narrow environments, such as detecting possible leakage points, etc. Moreover, the UAV body 1 maintains a certain safety distance from the detection position, improving safety.

[0053] Among them, the gas detection sensor module 20 can adopt the conventional sensor models in the existing technology and is not limited here.

[0054] For the convenience of controlling the lifting of the lifting frame 10; as Figure 3 、 Figure 4 shown, the lifting control component includes:

[0055] Mounting frame 17, the mounting frame 17 is installed on the bottom of the UAV body 1;

[0056] Winding wheel 9, the winding wheel 9 is rotatably installed on the mounting frame 17 through a shaft;

[0057] Winding and unwinding motor 16, the winding and unwinding motor 16 is installed on the outer wall of one side of the mounting frame 17, and the output end of the winding and unwinding motor 16 is in transmission connection with the shaft of the winding wheel 9;

[0058] Traction rope 12, one end of the traction rope 12 is fixed on the lifting frame 10, and the other end of the traction rope 12 is wound on the winding wheel 9;

[0059] By setting up the lifting control component, the winding and unwinding of the winding wheel 9 can be driven based on the operation of the winding and unwinding motor 16, and then the lifting of the lifting frame 10 can be controlled to achieve the purpose of controlling the telescopic of the elastic folding cylinder 11.

[0060] To improve the stability of the elastic folding cylinder 11; as Figure 3 , Figure 4 shown, a circumferentially distributed ball seat 23 is provided at the bottom of the lifting frame 10, and a gravity ball 33 is movably installed in the ball seat 23;

[0061] By providing the ball seat 23 and the gravity ball 33, the elastic folding cylinder 11 can be stretched more stably, and the structural stability is improved to a certain extent.

[0062] Among them, the annular installation chamber 14 has an annular structure with a larger inner diameter in the middle section and smaller inner diameters at both ends.

[0063] To improve the practicability; as Figure 3 shown, a camera module 13 is installed at the bottom of the UAV body 1, and a landing gear 3 is installed at the bottom of the UAV body 1. When the towing rope 12 is in the retracted state, the bottom of the gravity ball 33 is higher than the bottom of the landing gear 3.

[0064] To improve the reliability; as Figure 4 shown, a protective cage 19 is installed at the bottom of the mounting seat 15, and the gas detection sensor module 20 is located inside the protective cage 19;

[0065] By providing the protective cage 19, large-sized foreign objects can be prevented from contacting the gas detection sensor module 20 while maintaining air circulation, thereby improving the reliability.

[0066] To facilitate the cleaning of the exhaust fan 21 and the annular installation chamber 14; as Figure 1 , Figure 4 , Figure 5 shown, a liquid tank 6 is installed on the UAV body 1, a first pump body 7 is installed on the UAV body 1 through a bracket, one end of the first pump body 7 is connected to the inside of the liquid tank 6 through a pipeline, the other end of the first pump body 7 is connected to a connector 24 through a delivery pipe 2, the connector 24 is fixed inside the annular installation chamber 14, and a spray head 29 is provided on one side of the connector 24; a fixed buckle 18 is provided at the bottom of the UAV body 1, and the delivery pipe 2 is fixed in the fixed buckle 18;

[0067] By providing structures such as the spray head 29, when the first pump body 7 works, the liquid in the liquid tank 6 can be extracted and output to the annular installation chamber 14 through the spray head 29, achieving the function of flushing and cleaning.

[0068] To facilitate the cleaning of the exhaust fan 21; as Figure 4 , Figure 5As shown, a guide rod 27 is fixed to the bottom of the exhaust fan 21. A cleaning frame 22 is slidably connected to the outside of the guide rod 27. A plurality of evenly distributed cleaning brushes 25 are arranged on one side of the cleaning frame 22 close to the exhaust fan 21. The cleaning frame 22 and the guide rod 27 are connected by a spring 26. Without external force, the cleaning brush 25 does not contact the exhaust fan 21.

[0069] An elastic liquid sac 28 is arranged at the top of the connector 24. The elastic liquid sac 28 is communicated with the inside of the connector 24. The inner diameter of the end of the nozzle 29 is smaller than the inner diameter of the delivery pipe 2. When the first pump body 7 works to supply liquid, the liquid fills the connector 24 and causes the elastic liquid sac 28 to expand upward, jacking up the cleaning frame 22 so that the cleaning brush 25 contacts the blades of the exhaust fan 21.

[0070] By providing structures such as the cleaning brush 25 and the elastic liquid sac 28, during normal use, since the cleaning brush 25 does not contact the exhaust fan 21, interference with the operation of the exhaust fan 21 can be avoided. When cleaning is required, based on the operation of the first pump body 7 to supply liquid, the liquid fills the connector 24 and causes the elastic liquid sac 28 to expand upward, jacking up the cleaning frame 22 so that the cleaning brush 25 contacts the blades of the exhaust fan 21. The exhaust fan 21 operates at a low power, and the cleaning brush 25 is used to brush and clean the blades, improving the cleaning effect.

[0071] To facilitate improving the stability of the device; as Figure 1 、 Figure 6 shown, a liquid box 5 is fixed to the machine arm 4. A second pump body 8 is installed on the UAV main body 1 through a bracket. One end of the second pump body 8 is connected to the inside of the liquid tank 6 through a pipeline, and the other end of the second pump body 8 is communicated with the bottom of the liquid box 5 through a connecting pipe 32. Both the first pump body 7 and the second pump body 8 are connected to the control module of the UAV main body 1.

[0072] By providing structures such as the second pump body 8 and the liquid box 5, based on the operation of the second pump body 8, the liquid can be pumped between the liquid box 5 and the liquid tank 6, thereby better balancing the center of gravity and ensuring the stability of the structure.

[0073] To improve the control effect; as Figure 6 shown, a plurality of partition plates 30 are installed on the inner wall of the bottom of the liquid box 5. Openings are provided at the bottoms of the partition plates 30. One side of the partition plates 30 close to the UAV main body 1 is hingedly installed with one-way baffle plates 31 through shafts and clockwork springs. The one-way baffle plates 31 conduct one-way closing of the openings.

[0074] By setting the partition plate 30 and the one-way baffle 31, when liquid is fed into the liquid box 5, the liquid can be closer to the UAV body 1 when it is just fed in. When the liquid level rises to a certain extent, it will then flow downward across the partition plate 30 to the next area, which reduces the sensitivity of the center of gravity adjustment to a certain extent and improves the controllability. When the liquid is pumped out of the liquid box 5, the liquid can flow toward the UAV body 1 side through the opening of the partition plate 30 to meet the liquid pumping requirement.

[0075] Among them, the connection and layout methods of each pump body and the pipeline can all refer to the prior art and will not be elaborated here. Structures such as the liquid box 5 and the liquid tank 6 should be provided with air holes or other pressure balance structures to maintain the internal pressure balance, which will not be elaborated here.

[0076] Embodiment 2: A monitoring method for an exhaust gas pollution monitoring device, as Figures 1-6 shown. Based on Embodiment 1, this embodiment specifically includes the following steps:

[0077] S1: Control the UAV body 1 to fly above the position to be measured;

[0078] S2: Work the winding and unwinding motor 16 to drive the unwinding of the take-up wheel 9;

[0079] S3: When the lifting frame 10 descends to the designated position, the winding and unwinding motor 16 stops working;

[0080] S4: The air extraction fan 21 works to extract and deliver gas through the elastic folding cylinder 11;

[0081] S5: The gas detection sensor module 20 collects data in real time;

[0082] S6: After the data collection is completed, the air extraction fan 21 stops working;

[0083] S7: The winding and unwinding motor 16 works to drive the structure to wind back to its original position.

[0084] For the parts not fully disclosed in the present invention, those skilled in the art can ensure the smooth implementation of the solution of the present invention based on common sense, normal thinking logic and the prior art.

[0085] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. An emission gas pollution monitoring device, characterized in that, Comprising: A drone main body (1), on the side of the drone main body (1), a plurality of arms (4) are arranged, and propeller mechanisms are installed at the ends of the arms (4); A gas detection mechanism is arranged at the bottom of the drone main body (1), and the gas detection mechanism includes: A mounting seat (15), the mounting seat (15) is mounted on the bottom of the drone main body (1), and a gas detection sensor module (20) is mounted at the bottom of the mounting seat (15); An annular mounting chamber (14), the annular mounting chamber (14) is mounted on the bottom of the drone main body (1) through a bracket, the top end of the annular mounting chamber (14) is located below the gas detection sensor module (20), and an exhaust fan (21) is mounted on the inner side of the middle of the annular mounting chamber (14); An elastic folding cylinder (11), the elastic folding cylinder (11) is mounted at the bottom end of the annular mounting chamber (14), a lifting frame (10) is mounted at the bottom end of the elastic folding cylinder (11), and uniformly distributed annular wrinkles are arranged on the elastic folding cylinder (11); A lifting control assembly, the lifting control assembly is mounted on the bottom of the drone main body (1) and is used to control the lifting of the lifting frame (10), so as to adjust the length of the elastic folding cylinder (11); A guide rod (27) is fixed at the bottom of the exhaust fan (21), a cleaning frame (22) is slidably connected to the outside of the guide rod (27), a uniformly distributed cleaning brush (25) is arranged on one side of the cleaning frame (22) close to the exhaust fan (21), and the cleaning frame (22) and the guide rod (27) are connected through a spring (26). When no external force acts, the cleaning brush (25) does not contact the exhaust fan (21); A liquid tank (6) is mounted on the drone main body (1), a first pump body (7) is mounted on the drone main body (1) through a bracket, one end of the first pump body (7) is connected to the inside of the liquid tank (6) through a pipeline, the other end of the first pump body (7) is connected to a connector (24) through a delivery pipe (2), the connector (24) is fixed in the annular mounting chamber (14), and a spray head (29) is arranged on one side of the connector (24); A fixing buckle (18) is arranged at the bottom of the drone main body (1), and the delivery pipe (2) is fixed in the fixing buckle (18); An elastic liquid bag (28) is arranged at the top of the connector (24), the elastic liquid bag (28) is communicated with the inside of the connector (24), and the inner diameter of the end of the spray head (29) is smaller than the inner diameter of the delivery pipe (2); When the first pump body (7) works to supply liquid, the liquid fills the connector (24) and makes the elastic liquid bag (28) expand upward, pushing up the cleaning frame (22) and making the cleaning brush (25) contact the blades of the exhaust fan (21).

2. The emission gas pollution monitoring device according to claim 1, wherein The lifting control assembly includes: A mounting frame (17), the mounting frame (17) is mounted on the bottom of the drone main body (1); A winding wheel (9), the winding wheel (9) is rotatably mounted on the mounting frame (17) through a shaft; A winding and unwinding motor (16), the winding and unwinding motor (16) is mounted on the outer wall of one side of the mounting frame (17), and the output end of the winding and unwinding motor (16) is in transmission connection with the shaft of the winding wheel (9); The towing rope (12), one end of the towing rope (12) is fixed to the lifting frame (10), and the other end of the towing rope (12) is wound on the winding wheel (9).

3. The emission gas pollution monitoring device according to claim 1, characterized in that, The bottom of the lifting frame (10) is provided with ball seats (23) distributed in a circle, and gravity balls (33) are movably installed in the ball seats (23).

4. An exhaust gas pollution monitoring device according to claim 1, characterized in that, A camera module (13) is installed at the bottom of the UAV main body (1), and a landing gear (3) is installed at the bottom of the UAV main body (1). When the towing rope (12) is in the wound state, the bottom of the gravity ball (33) is higher than the bottom of the landing gear (3).

5. An exhaust gas pollution monitoring device according to claim 2, characterized in that, A protective cage (19) is installed at the bottom of the mounting seat (15), and the gas detection sensor module (20) is located inside the protective cage (19).

6. The emission gas pollution monitoring device according to claim 2, characterized in that, A liquid box (5) is fixed on the arm (4), a second pump body (8) is installed on the UAV main body (1) through a bracket. One end of the second pump body (8) is connected to the inside of the liquid tank (6) through a pipeline, and the other end of the second pump body (8) is communicated with the bottom of the liquid box (5) through a connecting pipe (32); both the first pump body (7) and the second pump body (8) are connected to the control module of the UAV main body (1).

7. An exhaust gas pollution monitoring device according to claim 6, characterized in that, A plurality of partition plates (30) are installed on the inner wall of the bottom of the liquid box (5). An opening is provided at the bottom of the partition plate (30). One side of the partition plate (30) close to the UAV main body (1) is hingedly installed with a one-way baffle (31) through a shaft and a spiral spring, and the one-way baffle (31) performs one-way closing on the opening.

8. A flue gas pollution monitoring device according to any one of claims 5-7, characterized in that, The monitoring method of the monitoring device includes the following steps: S1: Control the UAV main body (1) to fly above the position to be measured; S2: Drive the winding wheel (9) to unwind by the operation of the winding and unwinding motor (16); S3: When the lifting frame (10) descends to the specified position, the winding and unwinding motor (16) stops working; S4: The air extraction fan (21) works to pump air through the elastic folding cylinder (11); S5: The gas detection sensor module (20) collects data in real time; S6: After the data collection is completed, the air extraction fan (21) stops working; S7: The winding and unwinding motor (16) works to drive the structure to wind and reset.

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