Damping connecting device of open-circuit gas analyzer for fixed-wing unmanned aerial vehicle

Abstract

The invention relates to the technical field of ecological environment monitoring, in particular to a damping connecting device of an open circuit gas analyzer for a fixed-wing unmanned aerial vehicle, and the damping connecting device comprises an outer connecting ring, an inner connecting ring, a damper, an adapter and a fixed part; the adapter is mounted on the fixed part, and the mounting surface of the adapter is obliquely arranged according to a preset angle; the outer connecting ring is suspended on the mounting surface; the inner connecting ring is suspended through a plurality of shock absorbers and is detachably connected to the interior of the outer connecting ring; the multiple shock absorbers are arranged in the circumferential direction of the outer connecting ring. And an insertion hole is formed in the inner connecting ring. The whole device is fixedly connected with the cabin bottom plate of the fixed-wing unmanned aerial vehicle only through the fixing piece, so that the connecting surface between the damping connecting device and the cabin is greatly reduced, and a vibration source can be conducted to a gas analyzer only from the fixing piece; therefore, the influence of vibration sources such as aircraft jittering caused by turbulent flow in the operation and flight processes of the engine and the propeller of the unmanned aerial vehicle on the precision of data monitored by the gas analyzer is reduced.

Description

Technical Field

[0001] The 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 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 three-dimensional wind speed, atmospheric temperature, humidity, pressure and other parameters with synchronous measurement to achieve monitoring of cross-interface greenhouse gas flux exchange.

[0003] In order to achieve high-frequency and 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, infrared laser gas analyzers, etc. Optical gas analyzers are extremely sensitive to vibration noise, which will directly affect the quality of gas analyzer monitoring data. If there are no effective vibration reduction measures, it may directly lead to data failure.

[0004] At present, airborne greenhouse gas monitoring platforms mainly involve two types of flight platforms: multi-rotor and fixed-wing. Fixed-wing flight platforms have more efficient spatial coverage, limited impact on the surrounding turbulent field and easy modeling, and are easier to integrate other equipment such as wind speed measurement to achieve greenhouse gas flux monitoring. Therefore, the use of fixed-wing flight platforms to monitor greenhouse gas concentrations or fluxes is the current mainstream method. Fixed-wing flight platforms mainly include manned aircraft and unmanned aerial vehicles. Traditional manned aircraft have sufficient internal space and large load capacity on the airborne platform, and can take complete and sufficient shock-absorbing measures for the gas analyzers they carry. However, manned aircraft have complicated airspace application procedures for flight activities, and the maintenance, transportation and flight costs of aircraft are extremely high. The implementation of an airborne flux observation requires a lot of manpower and material resources, and the risk of low-altitude flight monitoring is relatively high. These practical problems have greatly restricted the comprehensive development of airborne greenhouse gas monitoring and have also restricted the technological development in this field to a certain extent.

[0005] In recent years, with the rapid development of UAV technology and the trend of miniaturization of monitoring sensors, the technology of using UAV platforms to carry greenhouse gas analyzers and wind, temperature, humidity, pressure and other sensors to monitor atmospheric greenhouse gas concentrations and fluxes has begun to flourish. Among them, medium and large UAVs with a payload capacity greater than 5kg have a comparable endurance to small manned aircraft, and can simultaneously integrate multiple types of sensors such as open-path gas analyzers, wind probes, radiation, and laser ranging to achieve three-dimensional coordinated monitoring of greenhouse gas concentrations, fluxes, surface images, radiation and other multivariables. However, due to the small space and limited payload capacity of UAVs, it is difficult to effectively reduce the vibration of gas analyzers. Oil-powered UAVs represented by piston engines have great vibrations. High-frequency vibrations from the engine and propeller will directly lead to the failure of gas analyzer measurement data. Even if certain vibration reduction and seismic isolation measures are taken for the engine, it is difficult to completely isolate the impact of vibration on gas analyzer measurements; while the vibration of the motor of the electric-powered UAV itself is very small, and the main vibration sources are the propeller and the turbulence during flight. At present, there is still no good shock reduction measure for fixed-wing UAV platforms equipped with open-path gas analyzers. Existing relevant literature has adopted the isolation and shock reduction measures of hoisting for the EC150 gas analyzer of Campbell Company in the United States, but it is still difficult to effectively isolate the impact of vibration noise on gas measurement, resulting in a decrease in the quality of monitoring data. Therefore, how to effectively isolate the impact of various vibration noises on gas analyzer measurements is a key technical problem that needs to be solved when conducting greenhouse gas monitoring with UAVs and ensuring the quality of monitoring data. 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] (II) 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 connection ring, an inner connection ring, a shock absorber, an adapter and a fixing member;

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

[0011] The outer connecting ring is suspended and mounted on the mounting surface;

[0012] The inner connecting ring is suspended and detachably connected to the inner part 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 comprises 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 against the outer wall of the outer connecting ring, and the two are connected by a plurality of the second screws.

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

[0018] Optionally, along the axial direction of the inner connecting ring, a plurality of annular bosses are provided on the outer wall 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 penetrates 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 one by one on the plurality of surfaces of the outer connecting ring; 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 avoidance 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] (III) Beneficial effects

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

[0035] The outer connecting ring is suspended on the mounting surface, and the inner connecting ring is suspended inside the outer connecting ring, so that the inner connecting ring is suspended, that is, the gas analyzer is suspended. The entire device is fixedly connected to the bottom plate of the fixed-wing UAV cabin only through the fixing parts, which greatly reduces the connection surface between the shock-absorbing connecting device and the cabin. The vibration source can only be transmitted from the fixing parts to the gas analyzer, thus reducing the impact of vibration sources such as the operation of the UAV engine and propeller and the aircraft jitter caused by turbulence during flight on the accuracy of the data monitored by the gas analyzer.

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

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

[0038] Figure 2 It is a 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 It is a structural schematic diagram of the inner connecting ring of the present invention;

[0041] Figure 5 It is a structural schematic diagram of the external connecting ring of the present invention;

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

[0043] Figure 7 It is a schematic diagram of the axial amplitudes of the shock absorbing mode of the multiple T-shaped shock absorbers of the present invention in an S-shaped staggered surrounding distribution;

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

[0045] Fig. 9 It 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 avoidance groove; 42: inclined surface; 43: bottom surface; 44: fixing surface; 441: weight reduction groove;

[0051] 5: fixing member; 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 modes 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 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, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] See also Figure 1 and Figure 6 The present invention provides a shock-absorbing connection device for an open-circuit gas analyzer for a fixed-wing UAV, the shock-absorbing connection device comprising an outer connection ring 1, an inner connection 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 connection ring 1 is suspended on the mounting surface 41; the inner connection ring 2 is suspended and detachably connected to the inner part of the outer connection ring 1 through a plurality of shock absorbers 3; the plurality of shock absorbers 3 are arranged along the circumference of the outer connection ring 1; and a plug-in hole 21 is provided in the inner connection ring 2. The outer connection ring 1, the inner connection ring 2 and the shock absorber 3 are combined to form a shock-absorbing body.

[0058] In this embodiment, the shock absorber 3 is a liquid damping shock absorbing ball, and may also be other buffer components, such as a shock absorbing spring. The adapter 4 is used to install the shock absorbing body and the fixing member 5 at a 45° angle, and the shock absorbing connecting device is installed as a whole in the cabin of the fixed-wing UAV through the fixing member 5. The gas analyzer 6 is plugged into the plug hole 21, and the measurement optical path of the gas analyzer 6 is exposed outside the cabin to measure the gas concentration.

[0059] The outer connecting ring 1 is suspended on the mounting surface 41, and the inner connecting ring 2 is suspended inside the outer connecting ring 1, so that the inner connecting ring 2 is suspended, that is, the gas analyzer 6 is suspended, so that the gas analyzer 6 does not contact the drone body. The entire device is fixedly connected to the bottom plate of the fixed-wing drone cabin only through the fixing part 5, which greatly reduces the connection surface between the shock-absorbing connecting device and the cabin. The vibration source can only be transmitted from the fixing part 5 to the gas analyzer 6, thereby reducing the influence of vibration sources such as the operation of the drone engine and propeller and the 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 external connecting ring 1. The vibration force exerted on the shock absorber 3 is only transmitted to the gas analyzer 6 through the multiple shock absorbers 3, which efficiently utilizes the shock absorbing performance of the shock absorber 3, can effectively isolate lateral, longitudinal and vertical vibration noise, and achieve efficient shock absorption of external vibration force.

[0061] Among them, the types of gas analyzers 6 suitable for the shock-absorbing connection device include: LiCOR7500 series products of LiCOR of the United States, Ningbo Haierxin HT-1850 ecological environment water vapor open-circuit analyzer, Anhui Xinpu Optoelectronics 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 plug hole 21 to achieve a detachable connection between the gas analyzer 6 and the inner connecting ring 2. According to the different models (diameters) of the gas analyzer 6, the inner connecting ring 2 that matches its diameter is selected, and the shock-absorbing connection device can realize the installation of multiple models of gas analyzers 6, thereby 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 a plurality of 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 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 a plurality of 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, and the plurality of shock absorbers 3 are then circumferentially arranged on the outer wall of the inner connecting ring 2 to achieve the suspended installation of the inner connecting ring 2. Optionally, the connecting rod 332 is conical, and the caliber of the end away from the inner connecting ring 2 is larger than the caliber of the end close to the inner connecting ring 2, so as to further reduce the force-bearing surface of 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 use of the shock absorption performance of the shock absorber 3.

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

[0066] See also Figure 4, along the axial direction of the inner connecting ring 2, a plurality of annular bosses 22 are arranged 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 increase in the wall thickness of the inner connecting ring 2 also enhances the limiting ability of the inner connecting ring 2 on 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 as to firmly install the T-shaped shock absorber 33 on the inner connecting ring 2.

[0067] Secondly, the outer connecting ring 1 is a polyhedral columnar structure; along the circumference of the outer connecting ring 1, multiple shock absorbers 3 are arranged one by one on multiple facets of the outer connecting ring 1; and multiple shock absorbers 3 are arranged in an S-shaped staggered manner. Specifically, the facet structure enables the connecting plate 331 to abut against the facet, thereby improving the connection strength of the T-shaped shock absorber 33, allowing the T-shaped shock absorber 33 to fully exert its shock absorption performance, and the T-shaped shock absorber 33 can effectively isolate lateral, longitudinal and vertical vibration noise, and reduce 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 arranged one by one in the six faces, and along the circumference of the outer connecting ring 1, the six shock absorbers 3 are installed up and down in sequence, and the two annular bosses 22 are synchronously arranged up and down, and 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 shows that when multiple shock absorbers 3 are arranged in an S-shaped staggered manner, the amplitudes in various directions are smaller and the buffering and shock absorbing performance is stronger.

[0069] See also Figure 8 and Fig. 9 , the adapter 4 includes a mounting surface 41, an inclined surface 42, a bottom surface 43 and a fixing 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; the fixing surface 44 is connected to the fixing member 5 by a fourth screw. Figure 2Taking the orientation of the middle shock-absorbing connection 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 a preset inclination angle, which has a simple and practical structure.

[0070] In addition, the fixing member 5 includes 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 in parallel with the bottom plate 51. Since there is no connection between the bottom plate 51 and the bottom surface 43, the L-shaped fixing member 5 itself has a certain elastic buffering performance, which can initially reduce the external vibration force, and cooperate with a plurality of T-shaped shock absorbers 33 arranged in an S-shaped staggered manner to achieve efficient shock reduction. The parallel arrangement of each plate body and each surface body can improve the connection strength of the abutting surface, and improve the adaptation accuracy of the inclination angle of the inclined surface 42 and the preset inclination angle of the gas analyzer 6.

[0071] Furthermore, a shock absorber air-avoiding groove 411 is provided on the mounting surface 41. The shock absorber air-avoiding groove 411 is used to avoid the air connection plate 331 and also to reduce weight. Secondly, a weight-reducing groove 441 is provided on the fixing surface 44 to further reduce the weight of the adapter 4 and improve 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 materials to reduce the weight of the shock-absorbing connecting device and improve its structural strength.

[0073] When installed in a fixed-wing UAV, the bottom plate 51 is fixedly connected to the bottom plate of the fixed-wing UAV cabin, and then the gas analyzer 6 is installed in the inner connecting ring 2. The installation method is simple and quick. The gas analyzer 6 is softly connected to the fixed-wing UAV fuselage through the shock absorber 3, which effectively isolates or reduces the impact of vibration sources such as the UAV engine, propeller operation, and aircraft jitter caused by turbulence during flight on the gas analyzer 6, thereby improving the monitoring data accuracy of the gas analyzer 6.

[0074] It should be understood that the above description of the specific embodiments of the present invention is only for illustrating the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, but the present invention is not limited to the above specific implementation methods. Any changes or modifications made within the scope of the claims of the present invention should be included in the protection scope of the present invention.

Claims

1. A shock-absorbing connection device for an open-circuit gas analyzer for a fixed-wing unmanned aerial vehicle, characterized in that: The shock-absorbing connection device comprises an outer connection ring (1), an inner connection 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); The inner connecting ring (2) is provided with an inserting hole (21).

2. The shock-absorbing connection device of the open-circuit gas analyzer for fixed-wing UAV according to claim 1, characterized in that: The shock absorber (3) comprises a T-shaped shock absorber (33), a first screw (34) and a plurality of second screws (31); The outer connecting ring (1) is provided with a mounting hole (11); The T-shaped shock absorber (33) comprises 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 against the outer wall of the outer connecting ring (1), and the two are connected via a plurality of the second screws (31).

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

4. The shock-absorbing connection device for an open-circuit gas analyzer for a fixed-wing UAV according to claim 2, characterized in that: Along the axial direction of the inner connecting ring (2), a plurality of annular bosses (22) are arranged 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 penetrates the inner wall of the outer connecting ring (1) and the annular boss (22) and is connected to the connecting rod (332).

5. The shock-absorbing connection device of the open-circuit gas analyzer for a fixed-wing UAV according to any one of claims 1 to 4, characterized in that: The outer connecting ring (1) is a polyhedral columnar structure; Along the circumference of the outer connecting ring (1), the plurality of shock absorbers (3) are arranged one by one on the plurality of surfaces of the outer connecting ring (1); and the plurality of shock absorbers (3) are arranged in an S-shaped staggered manner.

6. The shock-absorbing connection device for an open-circuit gas analyzer for a fixed-wing UAV according to any one of claims 1 to 4, characterized in that: The adapter (4) comprises 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); and 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).

7. The shock-absorbing connection device of the open-circuit gas analyzer for a fixed-wing UAV according to claim 6, 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).

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

9. The shock-absorbing connection device of the open-circuit gas analyzer for a fixed-wing UAV according to claim 6, characterized in that: The fixing surface (44) is provided with a weight-reducing groove (441).

10. The shock-absorbing connection device of an open-circuit gas analyzer for a fixed-wing UAV according to any one of claims 1 to 4, 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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