Airborne aerosol collection device

Abstract

An airborne aerosol collection device relates to the technical field of aerosol sampling. It includes an air intake assembly, a diversion assembly, a sampling assembly, and a fixing assembly arranged in sequence; the air intake assembly includes an air intake cylinder and a sealing cover arranged inside and outside, the side wall of the air intake cylinder has an air intake hole connected to the inner cavity of the air intake cylinder, and a translation drive mechanism is provided between the air intake cylinder and the sealing cover; the diversion assembly includes a guide cylinder and an outer shell arranged inside and outside, one end of the guide cylinder is connected to one end of the air intake cylinder, and the other end of the guide cylinder has at least one diversion port; the sampling assembly includes a sampling box, a sampler, and a rotary drive mechanism, the sampler is rotatably installed in the sampling box, the sampler has a plurality of side rods evenly arranged along the circumference, and the side rods have sampling holes; the fixing assembly includes a fixing seat, and the end face of the fixing seat has a clamp and an elastic band for fixed connection with a drone. The present invention can collect aerosols on board.

Description

Technical Field

[0001] The present invention relates to the technical field of aerosol sampling, in particular to an airborne aerosol collection device carried by an unmanned aerial vehicle (UAV). Background Art

[0002] Aerosol particle research plays an important role in air quality monitoring and climate change impact assessment. The distribution of aerosol particles in the atmosphere is regional and stratified. Currently, aerosol sampling based on ground-based and high-altitude observations cannot fully meet the needs of aerosol observations at different altitudes. Manned aircraft sampling is suitable for sampling at altitudes above the troposphere (>1500 meters) and above, but is not suitable for low-altitude aerosol sampling below the troposphere (0-1500 meters). Summary of the Invention

[0003] The object of the present invention is to provide an airborne aerosol collection device for collecting aerosol samples in a specific low-altitude area below the troposphere and at a target altitude.

[0004] The technical solution adopted by the present invention to solve the technical problem is: an airborne aerosol collection device comprises an air intake component, a flow diversion component, a sampling component and a fixing component which are arranged in sequence;

[0005] The air intake assembly includes an air intake cylinder and a sealing cover arranged inside and outside. The air intake cylinder is a hollow structure with one end open. The side wall of the air intake cylinder has an air intake hole connected to the inner cavity of the air intake cylinder. A translation drive mechanism is provided between the air intake cylinder and the sealing cover, and the translation drive mechanism is used to drive the sealing cover to move relative to the air intake cylinder.

[0006] The diversion assembly includes a guide tube and a shell arranged inside and outside, the shell is fixedly connected to one end of the air inlet tube, one end of the guide tube is connected to one end of the air inlet tube, and the other end of the guide tube has at least one diversion port;

[0007] The sampling assembly includes a sampling box, a sampler, and a rotation drive mechanism. The sampling box is fixed in contact with the housing and has a socket on the end surface of the sampling box. The sampler is rotatably installed in the sampling box. The sampler has a plurality of side rods evenly arranged along the circumference, each of which has a sampling hole. The diversion port extends through the socket into the sampling box and contacts the end surface of the sampler. The rotation drive mechanism is arranged in the sampling box to drive the intermittent rotation of the sampler, and the diversion port is aligned and connected with the sampling hole every time the sampler rotates.

[0008] The fixing assembly includes a fixing seat, and an end surface of the fixing seat is provided with a clamp and an elastic band for fixed connection with the drone.

[0009] Furthermore, the translation drive mechanism includes a piston cylinder, a piston rod and an air pipe, the piston cylinder is fixed to the other end of the air inlet cylinder, one end of the piston rod is fixedly connected to the sealing cover, the other end of the piston rod extends into the piston cylinder, and an air cavity is formed between the other end of the piston rod and the piston cylinder, the air outlet end of the air pipe is connected to the air cavity, and the air inlet end of the air pipe is connected to the air pump.

[0010] Furthermore, a side wall of the sealing cover is provided with an annular groove, and the air pipe is spiral-shaped and located in the annular groove.

[0011] Furthermore, the rotation drive mechanism includes a motor, a driving wheel, a transmission member and a main shaft. The motor is fixed in the sampling box, the driving wheel is fixed at the output end of the motor, the main shaft is rotatably installed in the sampling box, and the transmission member is located between the driving wheel and the main shaft. When the motor drives the driving wheel to rotate, the main shaft is driven to rotate through the transmission member, and the sampler is relatively fixedly connected to the main shaft.

[0012] Furthermore, it also includes a positioning block, one end of which is slidably set in the inner cavity of the main shaft, and the positioning block rotates synchronously with the main shaft. There is a spring between one end of the positioning block and the inner cavity wall of the main shaft. When the spring is at a natural length, the other end of the positioning block extends into the positioning hole at the bottom of the sampler to realize a relatively fixed connection between the sampler and the main shaft.

[0013] Furthermore, the end of the positioning block facing the sampler has a driving inclined surface.

[0014] Furthermore, the bottom of the sampler has a boss, and the positioning hole is arranged in the boss.

[0015] Furthermore, the boss is rotatably connected to one end of the support plate, and a side cover is fixed to the other end of the support plate, and the side cover is slidably connected to the inner cavity of the sampling box; a turntable is rotatably installed on the top of the sampler, and a slider is fixed on the turntable, and a sliding groove is provided on the top wall of the sampling box to be slidably connected to the slider.

[0016] Furthermore, the side rod is connected to the sampler by snap-fit ​​or plug-in connection.

[0017] The beneficial effects of the present invention are as follows: the present invention creates an air inlet through the setting of the air intake component, and has an opening and closing function, which is opened when sampling is required and closed when sampling is not required; through the setting of the diversion component, the sampled air can be divided into multiple parts, thereby realizing the collection of different target objects; through the setting of the sampling component, the collection of target objects is realized; through the setting of the fixing component, the present invention is fixed on a drone, thereby realizing airborne sampling and sampling of aerosols at a specific height. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A three-dimensional diagram of the present invention;

[0019] Figure 2 It is the front view of the present invention;

[0020] Figure 3 A top view of the present invention;

[0021] Figure 4 A bottom view of the present invention;

[0022] Figure 5 It is a left side view of the present invention;

[0023] Figure 6 is a cross-sectional view of the air intake assembly;

[0024] Figure 7 is a cross-sectional view of the diversion component;

[0025] Figure 8 is a top view of the sampling assembly;

[0026] Figure 9 is a cross-sectional view of the sampling box;

[0027] Figure 10 This is a top view of the sampler;

[0028] Figure 11 This is a bottom view of the sampler;

[0029] Figure 12 This is the internal structure diagram of the sampling box;

[0030] Figure 13 A cross-sectional view of the main axis;

[0031] Figure 14 A schematic diagram of the process of pulling the sampler out of the sampling box;

[0032] In the figure: 1 sealing cover, 11 air inlet cylinder, 12 air inlet hole, 13 piston rod, 14 blind hole, 15 piston cylinder, 151 side hole, 16 ring groove, 17 trachea, 171 air outlet end, 18 air cavity, 2 outer shell, 21 air inlet, 22 trachea hole, 23 guide cylinder, 24 mounting rod, 25 diversion port, 3 sampling box, 30 jack, 31 side cover, 32 support plate, 33 slide groove, 34 main shaft, 341 mounting shaft, 35 positioning block, 351 driving inclined plane, 36 spring, 37 motor, 38 driving wheel, 39 transmission part, 4 fixing seat, 41 mounting part, 42 clamp, 43 bolt assembly, 44 elastic band, 5 sampler, 51 turntable, 52 slider, 53 side rod, 54 sampling hole, 55 boss, 56 positioning hole. DETAILED DESCRIPTION

[0033] like Figures 1 to 14As shown, the present invention includes an air intake component, a flow diversion component, a sampling component and a fixing component. The present invention is described in detail below with reference to the accompanying drawings.

[0034] like Figures 1 to 14 As shown, the airborne aerosol collection device includes an air intake component, a flow diversion component, a sampling component and a fixing component arranged in sequence, as shown in FIG. Figure 6 As shown, the air intake assembly includes an air intake cylinder 11 and a sealing cover 1 which are arranged inside and outside. The air intake cylinder 11 is a hollow structure with one end open. The side wall of the air intake cylinder 11 has an air intake hole 12 which is connected to the inner cavity of the air intake cylinder 11. A translation drive mechanism is provided between the air intake cylinder 11 and the sealing cover 1. The translation drive mechanism is used to drive the sealing cover 1 to move relative to the air intake cylinder 11, thereby causing the sealing cover 1 to block the air intake hole 12 on the air intake cylinder 11, or to expose the air intake hole 12 on the air intake cylinder 11. When the air intake hole 12 on the air intake cylinder 11 is exposed, air can enter the air intake cylinder 11 through the air intake hole 12. After the air intake hole 12 on the air intake cylinder 11 is blocked, external air cannot enter the interior of the air intake cylinder 11 through the air intake hole 12. Specifically, the translation drive mechanism includes a piston cylinder 15, a piston rod 13 and an air pipe 17. The piston cylinder 15 is fixed to the other end of the air inlet cylinder 11. One end of the piston rod 13 is fixedly connected to the sealing cover 1. The other end of the piston rod 13 extends into the piston cylinder 15. An air cavity 18 is formed between the other end of the piston rod 13 and the piston cylinder 15. The air outlet end 171 of the air pipe 17 is connected to the air cavity 18. The air inlet end of the air pipe 17 is connected to the air pump, and the air pump is located in the sampling box 3. When the air pump is working, air is blown into the air cavity 18 through the air pipe 17, or air is extracted from the air cavity. When air is blown into the air cavity 18, the air pushes the piston rod 13 to move in the piston cylinder 15, thereby causing the sealing cover 1 to move to the side away from the air inlet cylinder 11 until the air inlet hole 12 is exposed / opened. On the contrary, when the air in the air cavity 18 is extracted, the adsorption piston rod 13 moves in the opposite direction in the piston cylinder 15, thereby causing the sealing cover 1 to move toward the side close to the air inlet cylinder 11, thereby blocking / closing the air inlet hole 12. By controlling the time interval between the exposure and blocking of the air inlet hole 12, the sampling time can be controlled. The side wall of the sealing cover 1 has an annular groove 16, and the air pipe 17 is spiral and located in the annular groove 16. In order to achieve communication between the air pipe 17 and the air cavity 18, a side hole 151 is provided on the side wall of the piston cylinder 15, and the air in the air pipe 17 enters the air cavity 18 through the side hole 151.

[0035] like Figure 7 As shown, the flow diversion assembly includes a guide tube 23 and a shell 2 arranged inside and outside, as shown in FIG. Figures 1 to 5As shown, the outer shell 2 is fixedly connected to one end of the air inlet cylinder 11, and one end of the guide cylinder 23 is connected to one end of the air inlet cylinder 11. The other end of the guide cylinder 23 has at least one diversion port 25. Specifically, the outer shell 2 is a cylindrical hollow structure, and the guide cylinder 23 is a conical hollow structure. The small end of the guide cylinder 23 is fixedly in contact with the inner wall of one end of the outer shell 2. An air inlet 21 is provided on the side wall of one end of the outer shell 2. One end of the air inlet cylinder 11 is connected to the inner cavity of the guide cylinder 23 through the air inlet 21. In this way, air in the air inlet cylinder 11 enters the guide cylinder 23 through the air inlet 21, moves within the guide cylinder 23, and finally moves out of the diversion port 25 at the other end of the guide cylinder 23. To achieve the fixation between the guide cylinder 23 and the outer shell 2, a mounting rod 24 is provided between the outer wall of the guide cylinder 23 and the inner wall of the outer shell 2 to fix the outer shell 2 and the guide cylinder 23 together. There can be two or three diversion openings 25 , and different diversion openings 25 have different sizes.

[0036] like Figure 8 As shown, the sampling assembly includes a sampling box 3, a sampler 5 and a rotary drive mechanism. The sampling box 3 is fixed in contact with the housing 2 and has a socket 30 on the end face of the sampling box 3. The sampler 5 is rotatably installed in the sampling box 3. The sampler 5 has a plurality of side rods 53 evenly arranged along the circumference. The side rods 53 have sampling holes 54, and the sampling holes 54 have a sampling membrane. The diversion port 25 extends through the socket 30 into the sampling box 3 and contacts the end face of the sampler 5. The rotary drive mechanism is arranged in the sampling box 3 to drive the intermittent rotation of the sampler 5, and the diversion port 25 is aligned and connected with the sampling hole 54 every time the sampler 5 rotates. Specifically, as Figure 12 As shown, the rotary drive mechanism includes a motor 37, a driving wheel 38, a transmission member 39 and a main shaft 34. The motor 37 is fixed in the sampling box 3, the driving wheel 38 is fixed to the output end of the motor 37, and the main shaft 34 is rotatably mounted in the sampling box 3. The transmission member 39 is located between the driving wheel 38 and the main shaft 34. When the motor 37 drives the driving wheel 38 to rotate, the main shaft 34 is driven to rotate through the transmission member 39. The sampler 5 is relatively fixedly connected to the main shaft 34. Figure 13 As shown, it also includes a positioning block 35, one end of the positioning block 35 is slidably set in the inner cavity of the main shaft 34, the positioning block 35 rotates synchronously with the main shaft 34, and a spring 36 is provided between one end of the positioning block 35 and the inner cavity wall of the main shaft 34. When the spring 36 is at its natural length, as shown in FIG. Figure 11 As shown, the other end of the positioning block 35 extends into the positioning hole 56 at the bottom of the sampler 5 to achieve a relatively fixed connection between the sampler 5 and the main shaft 34. The end of the positioning block 35 facing the sampler 5 has a driving inclined surface 351.

[0037] like Figure 11As shown, the bottom of the sampler 5 has a boss 55, and a positioning hole 56 is set in the boss 55. The positioning hole 56 is a square hole, and the positioning block 35 is a square with the same shape as the positioning hole 56. After the positioning block 35 is inserted into the positioning hole 56, the main shaft 34 and the sampler 5 rotate synchronously. When the sampler 5 is pulled toward the upper end of the driving inclined surface 351, as shown in FIG. Figure 14 As shown, by pulling the side cover 31 and the support plate 32, the sampler 5 is moved toward the outside of the sampling box 5. At this time, the boss 55 presses the driving inclined surface 351, overcoming the elastic force of the spring 36 and causing the positioning block 35 to move toward the inside of the main shaft 34, thereby realizing the separation of the boss 55 from the main shaft 34. When it is necessary to synchronously connect the boss 55 and the main shaft 34, first ensure that the lower end of the driving inclined surface 351 is facing the sampler 5, and then push the sampler 5 toward the side of the positioning block 35. At this time, the boss 55 presses the driving inclined surface 351, overcoming the elastic force of the spring 36 and squeezing the positioning block 35 into the main shaft 34 until the positioning block 35 is aligned with the positioning hole 56. Under the action of the spring 36, the positioning block 35 is pushed into the positioning hole 36, realizing the synchronous rotation connection between the boss 55 and the positioning block 35, that is, the synchronous rotation connection between the sampler 5 and the main shaft 34.

[0038] To ensure that the positioning hole 56 is aligned with the positioning block 35 during the movement of the sampler 5, Figure 9 、 Figure 10 As shown, a turntable 51 is rotatably mounted at one end of the sampler 5, and a pair of parallel sliders 52 are fixed to the turntable 51. A slide groove 33 is provided on the inner wall of one end of the sampling box 3, and the sliders 52 are slidably arranged in the slide groove 33. When the sliders extend into the corresponding slide groove 33, the positioning holes 56 and the positioning blocks 35 are aligned, thereby ensuring that the positioning holes 56 and the positioning blocks 35 are aligned.

[0039] like Figures 1 to 5 As shown, the fixing assembly includes a fixing base 4, the end face of which is provided with a clamp 42 and an elastic band 44 for securing the connection to the drone. The clamp 42 is secured to a mounting member 41, which comprises a circular plate and a fixing rod. The circular plate of the mounting member 41 is threadedly connected to a threaded hole in the end face of the fixing base 4, and the clamp 42 is fixedly connected to the fixing rod of the mounting member 42. A bolt assembly 43 is provided on the clamp 42 for easy locking. The elastic band 44 is provided so that after the collection device is securely connected to the drone via the clamp 42, the elastic band 44 can be used to secure the collection device to the drone.

[0040] To facilitate the assembly of the side rods 53 , the side rods 53 are snap-fitted or plug-fitted to the sampler 5 . The sampler 5 is a regular polygonal structure, and the side walls of the sampler 5 are the mounting surfaces of the side rods 53 .

[0041] The air intake assembly can be one or two. When there are two air intake assemblies, two flow diverter assemblies are also provided. At this moment, the jacks 30 are two groups corresponding to the flow diverter assemblies one by one.

[0042] The working principle of the present invention is described below:

[0043] The present invention is secured to a drone via a clamp 42 and an elastic band 44. When sampling is required, the translational drive mechanism drives the sealing cover 1 relative to the air inlet cylinder 11, exposing the air inlet hole 12. Air then enters the air inlet cylinder 11 through the air inlet hole 12, passes through the air inlet 21, enters the guide cylinder 23, and then exits the housing 2 through the diversion port 25 and enters the sampling hole 54. Aerosols are intercepted and collected within the sampling hole 54. To collect aerosols again or from another location, the rotary drive mechanism rotates the sampler 5 once, causing the new sampling hole 54 to align with the jack 30.

[0044] The present invention creates an air inlet through the setting of an air intake component, and has an opening and closing function, which is opened when sampling is required and closed when sampling is not required; through the setting of a diversion component, the sampled air can be divided into multiple parts, thereby realizing the collection of different target objects; through the setting of a sampling component, the collection of target objects is realized; through the setting of a fixing component, the present invention is fixed on a drone, thereby realizing airborne sampling and sampling of aerosols at a specific height.

Claims

1. Airborne aerosol collection device, characterized in that: It includes an air intake component, a flow distribution component, a sampling component and a fixing component which are arranged in sequence; The air intake assembly includes an air intake cylinder and a sealing cover arranged inside and outside. The air intake cylinder is a hollow structure with one end open. The side wall of the air intake cylinder has an air intake hole connected to the inner cavity of the air intake cylinder. A translation drive mechanism is provided between the air intake cylinder and the sealing cover, and the translation drive mechanism is used to drive the sealing cover to move relative to the air intake cylinder. The diversion assembly includes a guide tube and a shell arranged inside and outside, the shell is fixedly connected to one end of the air inlet tube, one end of the guide tube is connected to one end of the air inlet tube, and the other end of the guide tube has at least one diversion port; The sampling assembly includes a sampling box, a sampler, and a rotation drive mechanism. The sampling box is fixed in contact with the housing and has a socket on the end surface of the sampling box. The sampler is rotatably installed in the sampling box. The sampler has a plurality of side rods evenly arranged along the circumference, each of which has a sampling hole. The diversion port extends through the socket into the sampling box and contacts the end surface of the sampler. The rotation drive mechanism is arranged in the sampling box to drive the intermittent rotation of the sampler, and the diversion port is aligned and connected with the sampling hole every time the sampler rotates. The fixing assembly includes a fixing seat, and an end surface of the fixing seat is provided with a clamp and an elastic band for fixed connection with the drone.

2. The airborne aerosol collection device according to claim 1, characterized in that: The translation drive mechanism includes a piston cylinder, a piston rod and an air pipe. The piston cylinder is fixed to the other end of the air inlet cylinder, one end of the piston rod is fixedly connected to the sealing cover, the other end of the piston rod extends into the piston cylinder, and an air cavity is formed between the other end of the piston rod and the piston cylinder. The air outlet end of the air pipe is connected to the air cavity, and the air inlet end of the air pipe is connected to the air pump.

3. The airborne aerosol collection device according to claim 2, characterized in that: The side wall of the sealing cover is provided with an annular groove, and the air pipe is spiral-shaped and is located in the annular groove.

4. The airborne aerosol collection device according to claim 3, characterized in that: The rotary drive mechanism includes a motor, a driving wheel, a transmission member and a main shaft. The motor is fixed in the sampling box, the driving wheel is fixed at the output end of the motor, the main shaft is rotatably installed in the sampling box, and the transmission member is located between the driving wheel and the main shaft. When the motor drives the driving wheel to rotate, the main shaft is driven to rotate through the transmission member, and the sampler is relatively fixedly connected to the main shaft.

5. The airborne aerosol collection device according to claim 4, characterized in that: It also includes a positioning block, one end of which is slidably set in the inner cavity of the main shaft, and the positioning block rotates synchronously with the main shaft. There is a spring between one end of the positioning block and the inner cavity wall of the main shaft. When the spring is at its natural length, the other end of the positioning block extends into the positioning hole at the bottom of the sampler to achieve a relatively fixed connection between the sampler and the main shaft.

6. The airborne aerosol collection device according to claim 5, characterized in that: One end of the positioning block facing the sampler is provided with a driving inclined surface.

7. The airborne aerosol collection device according to claim 5, characterized in that: The bottom of the sampler is provided with a boss, and the positioning hole is arranged in the boss.

8. The airborne aerosol collection device according to claim 7, characterized in that: The boss is rotatably connected to one end of the support plate, and a side cover is fixed to the other end of the support plate, and the side cover is slidably connected to the inner cavity of the sampling box; a turntable is rotatably installed on the top of the sampler, and a slider is fixed on the turntable, and a sliding groove is provided on the top wall of the sampling box to be slidably connected to the slider.

9. The airborne aerosol collection device according to claim 1, characterized in that: The side rod is snap-connected or plug-connected to the sampler.

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