A shock-absorbing connection device for an open-circuit gas analyzer for fixed-wing unmanned aerial vehicles

Abstract

The present invention relates to the field of ecological environment monitoring technology, and specifically to a shock-absorbing connection device for an open-circuit gas analyzer for a fixed-wing unmanned aerial vehicle. The shock-absorbing connection device includes an outer connecting ring, an inner connecting ring, a shock absorber, an adapter, and a fixing member. The adapter is mounted on the fixing member, and the mounting surface of the adapter is tilted at a preset angle. The outer connecting ring is suspended and mounted on the mounting surface. The inner connecting ring is suspended and detachably connected to the inner portion of the outer connecting ring via a plurality of shock absorbers. The plurality of shock absorbers are arranged along the circumference of the outer connecting ring. A plug hole is provided in the inner connecting ring. The entire device is fixedly connected to the bottom plate of the fixed-wing unmanned aerial vehicle cabin only through the fixing member, which greatly reduces the connection surface between the shock-absorbing connection device and the cabin. The vibration source can only be transmitted from the fixing member to the gas analyzer, thereby reducing the impact of vibration sources such as the operation of the drone engine and propeller and the aircraft shaking caused by turbulence during flight on the accuracy of the data monitored by the gas analyzer.

Description

Technical Field

[0001] The present invention relates to the technical field of ecological environment monitoring, and in particular to a shock-absorbing connection device of an open-circuit gas analyzer for a fixed-wing unmanned aerial vehicle. Background Art

[0002] Airborne monitoring of greenhouse gas concentrations and fluxes is at the forefront of the development of ecological and environmental greenhouse gas monitoring technology in recent years. Compared with traditional ground-based online monitoring methods, it has the advantages of wide monitoring space coverage, rapid deployment, and the ability to achieve three-dimensional spatial monitoring. The monitoring types cover greenhouse gas concentrations and combine the synchronous measurement of three-dimensional wind speed, atmospheric temperature, humidity, pressure and other parameters to realize the monitoring of cross-interface greenhouse gas flux exchange.

[0003] To achieve high-frequency, high-precision measurement of atmospheric greenhouse gases (including H2O, CO2, and CH4), airborne greenhouse gas monitoring often uses open-path optical gas analyzers, such as infrared gas analyzers and infrared laser gas analyzers. However, optical gas analyzers are extremely sensitive to vibration noise, which directly affects the quality of gas analyzer monitoring data. Without effective vibration reduction measures, it may directly lead to data failure.

[0004] Currently, airborne greenhouse gas monitoring platforms primarily include multi-rotor and fixed-wing platforms. Fixed-wing platforms are the mainstream approach for monitoring greenhouse gas concentrations or fluxes due to their advantages, such as more efficient spatial coverage, limited impact on the surrounding turbulence field, ease of modeling, and easier integration with other equipment such as wind speed measurement for greenhouse gas flux monitoring. Fixed-wing platforms primarily include manned aircraft and unmanned aerial vehicles (UAVs). Traditional manned aircraft, with their ample internal space and high payload capacity, are capable of implementing comprehensive and adequate shock absorption measures for the gas analyzers they carry. However, manned aircraft operations face challenges such as cumbersome airspace application procedures, extremely high maintenance, transportation, and flight costs, the significant human and material investment required to conduct airborne flux observations, and the increased risk of low-altitude flight monitoring. These challenges have significantly limited the widespread implementation of airborne greenhouse gas monitoring and, to a certain extent, hindered technological development in this field.

[0005] In recent years, with the rapid development of drone technology and the trend toward smaller and lighter monitoring sensors, the use of drone platforms equipped with greenhouse gas analyzers, as well as wind, temperature, humidity, and pressure sensors, to monitor atmospheric greenhouse gas concentrations and fluxes has flourished. Medium- to large-sized drones with payload capacities exceeding 5 kg now have endurance comparable to small manned aircraft. They can also integrate multiple sensors, including open-path gas analyzers, wind probes, radiation, and laser ranging, enabling coordinated, three-dimensional monitoring of greenhouse gas concentrations, fluxes, surface imagery, and radiation. However, due to the confined space and limited payload capacity of drones, effective vibration reduction for gas analyzers is difficult. Oil-powered drones, typically those with piston engines, experience significant vibration. High-frequency vibrations from the engine and propeller can directly invalidate gas analyzer measurement data. Even with appropriate vibration isolation measures, it is difficult to completely isolate the impact of vibration on gas analyzer measurements. Electric drones, on the other hand, experience minimal vibration from their motors; the primary sources of vibration are the propellers and turbulence during flight. Currently, there are no effective vibration reduction measures for open-path gas analyzers mounted on fixed-wing UAV platforms. Existing literature reports that using hoisting isolation and vibration reduction measures for Campbell's EC150 gas analyzer still fails to effectively isolate the impact of vibration and noise on gas measurements, resulting in reduced monitoring data quality. Therefore, effectively isolating the impact of various vibration and noise on gas analyzer measurements is a key technical issue that needs to be addressed when using UAVs to monitor greenhouse gases and ensure data quality. Summary of the Invention

[0006] (1) Technical issues to be resolved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a shock-absorbing connection device for an open-circuit gas analyzer for a fixed-wing UAV, which solves the technical problem that the shock-absorbing effect of the existing gas analyzer shock-absorbing equipment is poor, resulting in low monitoring data accuracy of the gas analyzer.

[0008] (2) Technical solution

[0009] In order to achieve the above-mentioned object, the shock-absorbing connection device of the open-circuit gas analyzer for a fixed-wing UAV of the present invention comprises an outer connecting ring, an inner connecting ring, a shock absorber, an adapter and a fixing member;

[0010] The adapter is mounted on the fixing member, and the mounting surface of the adapter is tilted at a preset angle;

[0011] The outer connecting ring is mounted in a suspended manner on the mounting surface;

[0012] The inner connecting ring is suspended and detachably connected to the inner portion of the outer connecting ring through a plurality of the shock absorbers; the plurality of the shock absorbers are arranged along the circumference of the outer connecting ring;

[0013] A plug-in hole is provided in the inner connecting ring.

[0014] Optionally, the shock absorber includes a T-shaped shock absorber, a first screw and a plurality of second screws;

[0015] The outer connecting ring is provided with a mounting hole;

[0016] The T-shaped shock absorber includes a vertically arranged connecting plate and a connecting rod; the free end of the connecting rod passes through the mounting hole and is connected to the inner connecting ring through the first screw; the connecting plate abuts the outer wall of the outer connecting ring, and the two are connected by multiple second screws.

[0017] Optionally, a shock-absorbing gasket is provided between the nut of the second screw and the connecting plate; the shock-absorbing gasket is sleeved on the screw rod of the second screw.

[0018] Optionally, a plurality of annular bosses are provided on the outer wall of the inner connecting ring along the axial direction of the inner connecting ring;

[0019] The free end of the connecting rod abuts against the end surface of the annular boss;

[0020] Along the axial direction of the connecting rod, the first screw sequentially passes through the inner wall of the outer connecting ring and the annular boss and is connected to the connecting rod.

[0021] Optionally, the outer connecting ring is a polyhedral columnar structure;

[0022] Along the circumference of the outer connecting ring, the plurality of shock absorbers are arranged on the plurality of surfaces of the outer connecting ring in a one-to-one correspondence; and the plurality of shock absorbers are arranged in an S-shaped staggered manner.

[0023] Optionally, the adapter comprises the mounting surface, the inclined surface, the bottom surface and the fixing surface connected end to end;

[0024] The mounting surface is connected to the outer connecting ring via a third screw;

[0025] The mounting surface is arranged parallel to the axial direction of the inner connecting ring; the inclined surface is arranged perpendicular to the axial direction of the inner connecting ring;

[0026] The fixing surface is connected to the fixing member.

[0027] Optionally, the fixing member includes a base plate and a support plate arranged in an L-shape;

[0028] The support plate is connected to the fixing surface, and the two are arranged in parallel;

[0029] The bottom surface is arranged parallel to the bottom plate.

[0030] Optionally, a shock absorber air-avoiding groove is provided on the mounting surface.

[0031] Optionally, a weight-reducing groove is provided on the fixing surface.

[0032] Optionally, the outer connecting ring, the inner connecting ring, the adapter and the fixing member are all made of carbon fiber material.

[0033] (3) Beneficial effects

[0034] The beneficial effects of the present invention are:

[0035] The outer connecting ring is suspended on the mounting surface, while the inner connecting ring is suspended within the outer connecting ring, achieving a suspended installation of the inner connecting ring, and thus the gas analyzer. The entire device is fixed to the fixed-wing UAV cabin floor only through fixings, significantly reducing the connection surface between the shock-absorbing connection device and the cabin. Vibration sources are only transmitted from the fixings to the gas analyzer, thus reducing the impact of vibration sources such as the operation of the UAV engine and propellers, and aircraft vibration caused by turbulence during flight on the accuracy of the gas analyzer's monitoring data.

[0036] Multiple shock absorbers are arranged along the circumference of the outer connecting ring. The vibration force exerted on the shock absorber is only transmitted to the gas analyzer through multiple shock absorbers, which effectively utilizes the shock absorption performance of the shock absorber, can effectively isolate the horizontal, longitudinal and vertical vibration noise, and achieve efficient shock absorption of external vibration force. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic structural diagram of a shock-absorbing connection device for an open-circuit gas analyzer for a fixed-wing UAV according to the present invention;

[0038] Figure 2 Schematic diagram of the connection between the gas analyzer and the shock-absorbing connection device of the present invention;

[0039] Figure 3 It is a schematic diagram of the connection between the shock absorber and the inner connecting ring of the present invention;

[0040] Figure 4 Schematic diagram of the structure of the inner connecting ring of the present invention;

[0041] Figure 5 Schematic diagram of the structure of the outer connecting ring of the present invention;

[0042] Figure 6 A schematic diagram of the axial amplitudes of the shock-absorbing method of the present invention in which multiple T-shaped shock absorbers are arranged in a circular manner;

[0043] Figure 7 Schematic diagram of the axial amplitudes of the shock absorption method of multiple T-shaped shock absorbers arranged in an S-shaped staggered manner according to the present invention;

[0044] Figure 8 A schematic structural diagram of the adapter of the present invention from one perspective;

[0045] Figure 9 FIG. 4 is a schematic structural diagram of the adapter of the present invention from another perspective.

[0046] [Description of Reference Numerals]

[0047] 1: External connecting ring; 11: Mounting hole;

[0048] 2: inner connecting ring; 21: plug hole; 22: annular boss;

[0049] 3: shock absorber; 31: second screw; 32: shock-absorbing gasket; 33: T-shaped shock absorber; 331: connecting plate; 332: connecting rod; 34: first screw;

[0050] 4: Adapter; 41: Mounting surface; 411: Shock absorber air gap; 42: Inclined surface; 43: Bottom surface; 44: Fixing surface; 441: Weight reduction groove;

[0051] 5: fixing piece; 51: bottom plate; 52: supporting plate;

[0052] 6: Gas analyzer. DETAILED DESCRIPTION

[0053] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0054] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0055] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0056] In the present invention, unless otherwise specified or limited, the terms "connect," "fix," etc. should be understood in a broad sense. For example, "fix" can mean fixed connection, detachable connection, or integration; "connection" can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0057] See also Figure 1 and Figure 6 The present invention provides a shock-absorbing connection device for an open-path gas analyzer for a fixed-wing unmanned aerial vehicle. The shock-absorbing connection device includes an outer connecting ring 1, an inner connecting ring 2, a shock absorber 3, an adapter 4, and a fixing member 5. The adapter 4 is mounted on the fixing member 5, and the mounting surface 41 of the adapter 4 is tilted at a preset angle. The outer connecting ring 1 is suspended on the mounting surface 41. The inner connecting ring 2 is suspended and detachably connected to the inner portion of the outer connecting ring 1 via multiple shock absorbers 3. The multiple shock absorbers 3 are arranged along the circumference of the outer connecting ring 1. The inner connecting ring 2 is provided with a plug-in hole 21. The outer connecting ring 1, the inner connecting ring 2, and the shock absorber 3 together form a shock-absorbing body.

[0058] In this embodiment, shock absorber 3 is a liquid-damped shock-absorbing ball, but it can also be other buffering components, such as a shock-absorbing spring. Adapter 4 is used to mount the shock-absorbing body to fixing member 5 at a 45° angle. The entire shock-absorbing connection device is installed in the fixed-wing UAV cabin via fixing member 5. Gas analyzer 6 is plugged into socket 21, with its measurement optical path exposed outside the cabin to measure gas concentration.

[0059] The outer connecting ring 1 is suspended on the mounting surface 41, while the inner connecting ring 2 is suspended within the outer connecting ring 1. This allows the inner connecting ring 2 to be suspended, and thus the gas analyzer 6 to be suspended, eliminating contact between the gas analyzer 6 and the drone's fuselage. The entire device is fixedly connected to the fixed-wing drone's cabin floor solely through the fixings 5, significantly reducing the connection surface between the shock-absorbing connection device and the cabin. Vibration sources can only be transmitted from the fixings 5 ​​to the gas analyzer 6, thus reducing the impact of vibration sources such as the drone's engine and propeller operation, and aircraft jitter caused by turbulence during flight, on the accuracy of the data monitored by the gas analyzer 6.

[0060] Multiple shock absorbers 3 are arranged along the circumference of the outer connecting ring 1. The vibration force exerted on the shock absorber 3 is only transmitted to the gas analyzer 6 through multiple shock absorbers 3, which efficiently utilizes the shock absorption performance of the shock absorber 3, can effectively isolate the horizontal, longitudinal and vertical vibration noise, and achieve efficient shock absorption of external vibration force.

[0061] Among them, the types of gas analyzers 6 that the shock-absorbing connection device is suitable for include: LiCOR7500 series products of LiCOR of the United States, Ningbo Haierxin HT-1850 ecological environment water vapor open-circuit analyzer, Anhui Xinpu Photoelectric Open-circuit CO2 / H2O Flux Analyzer and other open-circuit gas analyzers of similar structure types.

[0062] The gas analyzer 6 can be plugged into the insertion hole 21, achieving a detachable connection between the gas analyzer 6 and the inner connecting ring 2. By selecting an inner connecting ring 2 that matches the diameter of the gas analyzer 6 according to the different models (diameters), the shock-absorbing connection device can realize the installation of multiple models of gas analyzers 6, improving the adaptability of the shock-absorbing connection device to the installation of gas analyzers 6 of different diameters.

[0063] like Figure 2 、 Figure 3 and Figure 5 As shown, the shock absorber 3 includes a T-shaped shock absorber 33, a first screw 34, and multiple second screws 31. The outer connecting ring 1 is provided with a mounting hole 11. The T-shaped shock absorber 33 includes a vertically arranged connecting plate 331 and a connecting rod 332. The free end of the connecting rod 332 passes through the mounting hole 11 and is connected to the inner connecting ring 2 via the first screw 34. The connecting plate 331 abuts the outer wall of the outer connecting ring 1, and the two are connected via multiple second screws 31. Specifically, one end of the T-shaped shock absorber 33 is connected to the outer wall of the outer connecting ring 1, and the other end passes through the mounting hole 11 and is connected to the inner connecting ring 2. The multiple shock absorbers 3 are then circumferentially arranged on the outer wall of the inner connecting ring 2 to achieve a suspended installation of the inner connecting ring 2. Optionally, the connecting rod 332 is tapered, with the diameter of the end facing away from the inner connecting ring 2 being larger than the diameter of the end near the inner connecting ring 2, thereby further reducing the load-bearing surface between the shock absorber 3 and the inner connecting ring 2.

[0064] Preferably, the outer diameter of the connecting rod 332 is smaller than the diameter of the mounting hole 11 to avoid contact between the connecting rod 332 and the inner wall of the mounting hole 11, thereby reducing the force bearing area of ​​the shock absorber 3 and the outer connecting ring 1 and achieving efficient utilization of the shock absorption performance of the shock absorber 3.

[0065] Furthermore, a shock-absorbing washer 32 is provided between the nut of the second screw 31 and the connecting plate 331; the shock-absorbing washer 32 is sleeved onto the screw rod of the second screw 31. In this embodiment, the shock-absorbing washer 32 is a rubber washer to further buffer and reduce external vibration forces and reduce the vibration forces on the connecting rod 332, and cooperate with the liquid damping shock-absorbing balls to achieve efficient shock absorption.

[0066] See also Figure 4Along the axial direction of the inner connecting ring 2, a plurality of annular bosses 22 are provided on the outer wall of the inner connecting ring 2; the free end of the connecting rod 332 abuts against the end face of the annular boss 22; along the axial direction of the connecting rod 332, the first screw 34 sequentially penetrates the inner wall of the outer connecting ring 1 and the annular boss 22 and is connected to the connecting rod 332. Specifically, the annular boss 22 increases the wall thickness of the inner connecting ring 2 so that the nut of the first screw 34 can be embedded in the wall of the inner connecting ring 2, thereby preventing the nut of the first screw 34 from interfering with the installation of the gas analyzer 6. At the same time, the increased wall thickness of the inner connecting ring 2 also enhances the inner connecting ring 2's ability to limit the screw of the first screw 34, thereby improving the connection stability between the T-shaped shock absorber 33 and the inner connecting ring 2, so that the T-shaped shock absorber 33 can be firmly installed on the inner connecting ring 2.

[0067] Secondly, the outer connecting ring 1 has a polyhedral columnar structure. Along the circumference of the outer connecting ring 1, multiple shock absorbers 3 are arranged one-to-one on the multiple facets of the outer connecting ring 1, and the multiple shock absorbers 3 are arranged in an S-shaped staggered pattern. Specifically, the facet structure allows the connecting plate 331 to abut against the facets on all sides, improving the connection strength of the T-shaped shock absorber 33 and allowing the T-shaped shock absorber 33 to fully utilize its shock-absorbing performance. The T-shaped shock absorber 33 can effectively isolate lateral, longitudinal, and vertical vibration noise, reducing the impact of external vibration on the accuracy of the monitoring data of the gas analyzer 6.

[0068] In this embodiment, the outer connecting ring 1 is a hexahedral columnar structure, and six shock absorbers 3 are provided in a one-to-one correspondence with each other. The six shock absorbers 3 are installed up and down in sequence along the circumference of the outer connecting ring 1. The two annular bosses 22 are synchronously arranged up and down. The up and down direction is the axial direction of the inner connecting ring 2, so as to realize the S-shaped staggered arrangement of the six shock absorbers 3. Figure 6 and Figure 7 As shown, Figure 6 is the amplitude in each direction when multiple shock absorbers 3 are arranged around an annular boss 22, Figure 7 The amplitudes in various directions when multiple shock absorbers 3 are arranged in an S-shaped staggered manner around two annular bosses 22 are tested under the same environment. The test results show that the amplitudes in various directions are smaller when multiple shock absorbers 3 are arranged in an S-shaped staggered manner, and the buffering and shock absorbing performance is stronger.

[0069] See also Figure 8 and Figure 9 The adapter 4 includes a mounting surface 41, an inclined surface 42, a bottom surface 43, and a fixed surface 44 connected end to end; the mounting surface 41 is connected to the outer connecting ring 1 by a third screw; the mounting surface 41 is arranged parallel to the axial direction of the inner connecting ring 2, that is, the shape and size of the mounting surface 41 are adapted to the shape and size of the mating surface of the outer connecting ring 1; the inclined surface 42 is arranged perpendicular to the axial direction of the inner connecting ring 2; and the fixed surface 44 is connected to the fixing member 5 by a fourth screw. Figure 2Taking the orientation of the middle shock-absorbing connecting device when placed horizontally as an example, the angle between the inclined surface 42 and the horizontal plane is a preset inclination angle, which is also the angle between the axis of the gas analyzer 6 and the horizontal plane. By setting the inclination angle of the inclined surface 42 according to actual installation requirements, the gas analyzer 6 can be installed at the preset inclination angle, which has a simple and practical structure.

[0070] Furthermore, the fixing member 5 includes an L-shaped base plate 51 and a support plate 52; the support plate 52 is connected to the fixing surface 44 and the two are arranged parallel to each other; the bottom surface 43 is arranged parallel to the base plate 51. Because there is no connection between the base plate 51 and the bottom surface 43, the L-shaped fixing member 5 itself has a certain elastic buffering performance, which can initially dampen external vibration forces and cooperate with multiple T-shaped shock absorbers 33 arranged in an S-shaped staggered manner to achieve efficient shock absorption. The parallel arrangement of each plate and each surface body can enhance the connection strength of the abutting surface and improve the accuracy of the adaptation of the inclination angle of the inclined surface 42 to the preset inclination angle of the gas analyzer 6.

[0071] Furthermore, a shock absorber clearance groove 411 is provided on the mounting surface 41. This serves both to prevent the connection plate 331 from being blocked and to reduce weight. Furthermore, a weight-reducing groove 441 is provided on the fixing surface 44, further reducing the weight of the adapter 4 and improving the reliability of the suspended installation of the shock-absorbing connection device.

[0072] In addition, the outer connecting ring 1 , the inner connecting ring 2 , the adapter 4 and the fixing member 5 are all made of carbon fiber material to reduce the weight of the shock-absorbing connecting device and improve its structural strength.

[0073] When installed within a fixed-wing drone, the base plate 51 is fixedly connected to the drone's cabin floor, and the gas analyzer 6 is then mounted within the inner connecting ring 2. This simple and quick installation method allows for a flexible connection between the gas analyzer 6 and the drone's fuselage via the shock absorber 3. This effectively isolates or reduces the impact of vibrations such as those caused by the drone's engine and propellers, as well as aircraft vibrations during flight, thereby improving the accuracy of the gas analyzer's monitoring data.

[0074] It should be understood that the above description of the specific embodiments of the present invention is merely for the purpose of illustrating the technical approach and features of the present invention. Its purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. However, the present invention is not limited to the above-described specific embodiments. Any changes or modifications made within the scope of the claims of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A shock-absorbing connection device for an open-circuit gas analyzer for a fixed-wing UAV, characterized in that: The shock-absorbing connection device comprises an outer connecting ring (1), an inner connecting ring (2), a shock absorber (3), an adapter (4) and a fixing member (5); The adapter (4) is mounted on the fixing member (5), and the mounting surface (41) of the adapter (4) is tilted at a preset angle; The outer connecting ring (1) is mounted in a suspended manner on the mounting surface (41); The inner connecting ring (2) is suspended and detachably connected to the inside of the outer connecting ring (1) through a plurality of the shock absorbers (3); the plurality of the shock absorbers (3) are arranged along the circumference of the outer connecting ring (1); A plug hole (21) is provided in the inner connecting ring (2); The outer connecting ring (1) is a polyhedral columnar structure; along the circumference of the outer connecting ring (1), a plurality of the shock absorbers (3) are arranged one by one on a plurality of faces of the outer connecting ring (1); and the plurality of the shock absorbers (3) are arranged in an S-shaped staggered manner; The shock absorber (3) includes a T-shaped shock absorber (33), a first screw (34) and a plurality of second screws (31); a mounting hole (11) is provided on the outer connecting ring (1); the T-shaped shock absorber (33) includes a vertically arranged connecting plate (331) and a connecting rod (332); the free end of the connecting rod (332) passes through the mounting hole (11) and is connected to the inner connecting ring (2) through the first screw (34); the connecting plate (331) abuts against the outer wall of the outer connecting ring (1), and the two are connected through the plurality of second screws (31).

2. The shock-absorbing connection device for an open-circuit gas analyzer for a fixed-wing UAV according to claim 1, characterized in that: A shock-absorbing washer (32) is provided between the nut of the second screw (31) and the connecting plate (331); the shock-absorbing washer (32) is sleeved on the screw rod of the second screw (31).

3. The shock-absorbing connection device for an open-circuit gas analyzer for a fixed-wing UAV according to claim 1, characterized in that: Along the axial direction of the inner connecting ring (2), a plurality of annular bosses (22) are provided on the outer wall of the inner connecting ring (2); The free end of the connecting rod (332) abuts against the end surface of the annular boss (22); Along the axial direction of the connecting rod (332), the first screw (34) sequentially passes through the inner wall of the outer connecting ring (1) and the annular boss (22) and is connected to the connecting rod (332).

4. The shock-absorbing connection device for an open-circuit gas analyzer for a fixed-wing UAV according to any one of claims 1 to 3, characterized in that: The adapter (4) includes the mounting surface (41), the inclined surface (42), the bottom surface (43) and the fixing surface (44) connected end to end; The mounting surface (41) is connected to the outer connecting ring (1) via a third screw; The mounting surface (41) is arranged parallel to the axial direction of the inner connecting ring (2); the inclined surface (42) is arranged perpendicular to the axial direction of the inner connecting ring (2); The fixing surface (44) is connected to the fixing member (5).

5. The shock-absorbing connection device for an open-circuit gas analyzer for a fixed-wing UAV according to claim 4, characterized in that: The fixing member (5) comprises a bottom plate (51) and a support plate (52) arranged in an L-shape; The support plate (52) is connected to the fixing surface (44), and the two are arranged in parallel; The bottom surface (43) is arranged parallel to the bottom plate (51).

6. The shock-absorbing connection device for an open-circuit gas analyzer for a fixed-wing UAV according to claim 4, characterized in that: A shock absorber air-avoiding groove (411) is provided on the mounting surface (41).

7. The shock-absorbing connection device for an open-circuit gas analyzer for a fixed-wing UAV according to claim 4, characterized in that: A weight-reducing groove (441) is provided on the fixing surface (44).

8. The shock-absorbing connection device for an open-circuit gas analyzer for a fixed-wing UAV according to any one of claims 1 to 3, characterized in that: The outer connecting ring (1), the inner connecting ring (2), the adapter (4) and the fixing member (5) are all made of carbon fiber material.

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