Portable plant flower volatile odor molecule collection device and system

Abstract

The invention relates to the technical field of plant physiology and ecology monitoring and analysis, in particular to a portable plant flower volatile odor molecule collecting device and system. According to the specific technical scheme, the device comprises a gas collecting bag and a collecting box with the adjustable size, the gas collecting bag is detachably fixed in the collecting box, the volume of the gas collecting bag is larger than or equal to that of the collecting box with the maximum size, and a fixing piece is transversely arranged on the inner wall of the collecting box; a fixing piece inserted into the fixing piece is arranged on the outer wall of the gas collecting bag, a fixing block is inserted into one side of the fixing piece, and the fixing piece is pressed and fixed; a bottom opening of the gas collecting bag extends out of the collecting box, and after flowers of the plant are located in the gas collecting bag, the bottom opening of the gas collecting bag and the stem part of the plant are fixed through a sealing piece. The problems of poor portability, high pollution and insufficient stability in collection of VOCs in wild flowers in the prior art are solved.

Description

Technical Field

[0001] This invention relates to the field of plant physiological and ecological monitoring and analysis technology, specifically to a portable device and system for collecting volatile odor molecules from plant flowers. Background Technology

[0002] Volatile organic compounds (VOCs) emitted from plant flowers are a key "chemical language" of plant-environment interactions. Their composition and release dynamics not only determine plant pollination strategies (such as attracting specific insects for pollination) but also play a central role in plant stress resistance (such as resisting pests and diseases and coping with extreme temperature and humidity), niche construction, and community interactions. Furthermore, the composition and content of flower VOCs are core indicators for plant variety identification, quality evaluation (such as the fragrance grade of ornamental flowers and the correlation of effective components in medicinal plants), and the development of biomimetic fragrances. Therefore, accurate collection and analysis of these VOCs are fundamental requirements in plant physiological and ecological research, agricultural breeding, and natural product development.

[0003] In ecological research, it is necessary to monitor the dynamic changes of VOCs in wild plants under natural stresses (such as drought and high temperature) over a long period of time in order to reveal the plant's stress resistance mechanism; in agricultural breeding, it is necessary to screen flower varieties that are "highly fragrant and lowly sensitive to pollution"; in the development of natural fragrances, it is necessary to collect VOCs from flowers of different origins and at different growth stages in order to determine the best harvesting time.

[0004] Currently, VOCs collection technologies for flowers are mainly divided into two categories: fixed laboratory collection and field collection. However, both types of technologies have significant limitations and cannot meet the requirements for efficient and accurate sampling in complex field environments. The specific problems are as follows:

[0005] Laboratory sampling utilizes the dynamic headspace method, which involves continuously purging flower samples placed in a sealed container with a stable carrier gas (such as high-purity nitrogen or clean air). This allows volatiles to be carried by the gas flow into an adsorption device (such as a Tenax-TA adsorption tube), followed by qualitative and quantitative analysis using thermal desorption-gas chromatography-mass spectrometry (TD-GC-MS). While this technique achieves high sampling repeatability and low background contamination, it demands stringent experimental conditions and is completely unsuitable for field settings.

[0006] To address the limitations of laboratory sampling, manual sampling bags (such as PTFE sampling bags) or simple adsorption tubes are commonly used in field settings. However, these methods suffer from three major problems: poor stability, high contamination, and low repeatability, which severely restrict sampling accuracy.

[0007] Therefore, developing a portable and pollution-resistant VOCs collection device for wild flowers has become an inevitable trend to solve the pain points of existing technologies and meet the application needs of multiple fields. It is also a key breakthrough to promote the upgrading of plant physiological and ecological monitoring technology from "static laboratory analysis" to "dynamic field monitoring". Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a portable device and system for collecting volatile odor molecules from plant flowers.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] This invention discloses a portable device for collecting volatile odor molecules from plant flowers, comprising a gas collection bag and a collection box with adjustable size. The gas collection bag is detachably fixed inside the collection box, and the volume of the gas collection bag is greater than or equal to the maximum size of the collection box. A fixing member is horizontally arranged on the inner wall of the collection box, and a fixing plate inserted into the fixing member is arranged on the outer wall of the gas collection bag. A fixing block is inserted into one side of the fixing member and presses and fixes the fixing plate. The bottom opening of the gas collection bag extends out of the collection box. When the plant flower is inside the gas collection bag, the bottom opening of the gas collection bag is fixed to the stem of the plant by a sealing member.

[0011] Preferably, the fastener is provided in multiple parts, consisting of two parallel upper and lower limiting plates, one of which has an insertion hole. The cross-section of the fixing block is T-shaped, and its vertical part is inserted into the insertion hole to press and fix the fixing plate inserted between the two limiting plates.

[0012] The collection box is square, and the fixing members are installed on each side wall inside the collection box. The number of fixing plates is the same as the number of fixing members, and they are correspondingly arranged.

[0013] Preferably, the collection box includes four side plates arranged in a square. An extension member is provided between adjacent side plates. The extension member includes a connecting strip with a fan-shaped cross-section. An extension plate is provided on each side of the connecting strip. An extension groove is provided on the side wall of the side plate for inserting the extension plate. A through hole communicating with the extension groove is provided on the outer wall of the side plate near its two sides. A positioning mechanism for the extension plate to be pressed against the through hole is provided.

[0014] Preferably, an auxiliary fixing member is provided on the side wall of the connecting strip located on its axis. The auxiliary fixing member is arranged along the axis of the connecting strip. The structure of the auxiliary fixing member is the same as that of the fixing member. An auxiliary fixing piece is vertically arranged on the side wall of the gas collection bag and inserted into the auxiliary fixing member.

[0015] Preferably, any two of the side plates are provided with a fixing hole, and the gas collection bag is provided with a gas nozzle at a position corresponding to the fixing hole, which communicates with the gas collection bag. The gas nozzle extends out of the side plate through the fixing hole.

[0016] Preferably, at least two of the side plates are provided with support members on their outer walls. Each support member includes a fixed post fixed to the outer wall of the side plate, a connecting ring sleeved on the fixed post, a universal joint at the bottom of the connecting ring, and a first self-locking telescopic rod at the other end of the universal joint.

[0017] Preferably, the collection box is placed inside a portable case, which includes a base and a top cover inserted into the base. The bottom of the base is provided with a plurality of second self-locking telescopic rods, and the top of the base is provided with a groove. The collection box is placed in the groove, and an adjusting component for controlling the size adjustment of the collection box is provided in the groove.

[0018] Preferably, a partition is horizontally arranged in the groove, and the adjusting member is arranged in the area enclosed by the partition and the groove. The adjusting member includes an adjusting knob. One end of the adjusting knob is fixed to the bottom center of the partition by a bearing, and the other end extends out of the bottom of the base and is fixed by a bearing. On the adjusting knob located in the groove, two gears are fixedly sleeved from top to bottom on the adjusting knob. Each gear is meshed with a set of transmission components. The two sets of transmission components are arranged vertically in space. Each set of transmission components includes two rack plates. The two rack plates are arranged centrally symmetrically and mesh with the two sides of the gear respectively.

[0019] The bottom of the partition and the bottom of the groove are respectively provided with a limiting ring corresponding to each rack plate. Each rack plate passes through its corresponding limiting ring and is in clearance fit. A support plate is provided on the side wall of the end of each rack plate away from the gear. A control rod is vertically provided on the support plate. The control rods on each set of transmission components are correspondingly provided, and their axes are on the same straight line as the axis of the adjusting knob. The control rod passes through the partition, and the partition is provided with a strip hole. The strip hole is consistent with the running trajectory of the control rod.

[0020] Preferably, the sealing element includes a fixing ring and a sealing ring. One side of the fixing ring and the sealing ring is in a disconnected state, communicating with their center. The top of the fixing ring and the bottom of the sealing ring are respectively provided with annular grooves communicating with their center holes. The bottom of the fixing ring is provided with multiple insertion posts around its center. The sealing ring is provided with insertion holes corresponding to the insertion posts. A fixing sleeve is coaxially provided in the annular groove of the sealing ring. The fixing sleeve is also in a disconnected state, and the disconnection position is consistent with the disconnection point on the sealing ring. The gas collection bag is provided with holes for the insertion posts to pass through. In use, the fixing ring is located inside the gas collection bag, and a soft plug with one side disconnected is inserted into the annular groove of the fixing ring. The sealing ring is located outside the gas collection bag. The holes on the gas collection bag pass through the insertion posts, and the insertion posts pass through the insertion holes, so that the open end of the gas collection bag passes through the center of the sealing ring and is tied to the side wall of the fixing sleeve. Then, a sealing plug is inserted into the fixing sleeve.

[0021] Accordingly, a collection system based on a portable plant flower volatile odor molecule collection device includes a water tank on the outer wall of the base, a water pump on the water tank, and an outlet pipe and an inlet pipe on the water pump, the inlet pipe being connected to the water tank; a protective plate on the side wall of the top cover, an air pump at the bottom of the protective plate, an inlet pipe and an outlet pipe connected to the air pump, the inlet pipe and the outlet pipe being connected to an air nozzle respectively, a filter module on the inlet pipe, an adsorption tube on the outlet pipe, and the air pump and water pump being connected to a battery and a controller respectively.

[0022] The present invention has the following beneficial effects:

[0023] The collection box used in this invention achieves length and width adjustment through the combination of side plates and extensions. That is, the extensions (including connecting strips and extension plates) between adjacent side plates can be pulled out to the required length and fixed by inserting positioning pins into through holes, so that the volume of the collection box can be flexibly adjusted within a certain range. It can accommodate small flowers as well as cover larger flowers without the need to replace gas collection bags of different specifications (gas collection bag volume ≥ maximum collection box volume, which can adapt to size changes).

[0024] Meanwhile, auxiliary fixing parts are set at the axis of the connecting strip to cooperate with the vertically set auxiliary fixing pieces, which can fix the four edges of the gas collection bag, prevent the gas collection bag from shifting or wrinkling when the size of the collection box is adjusted, and ensure that the inner wall of the gas collection bag maintains a safe distance from the flower, so as not to affect the natural release of VOCs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the gas collection bag.

[0026] Figure 2 This is a front view of the data collection box;

[0027] Figure 3 for Figure 2 Top view;

[0028] Figure 4 for Figure 2 View from AA direction;

[0029] Figure 5 for Figure 4 Enlarged view of part A in the middle;

[0030] Figure 6 for Figure 4 BB-direction view;

[0031] Figure 7 This is a structural schematic diagram of the extension component;

[0032] Figure 8 This is a schematic diagram of the side panel;

[0033] Figure 9 This is a longitudinal sectional view of the carrying case;

[0034] Figure 10 for Figure 9 Top view after removing the top cover;

[0035] Figure 11 for Figure 10 A schematic diagram after the partition has been removed;

[0036] Figure 12 This is a schematic diagram of the sealing element.

[0037] Figure 13 for Figure 12 Bottom view of the central fixed ring;

[0038] Figure 14 for Figure 12 Schematic diagram of the central sealing ring (view from below);

[0039] In the diagram: 1. Gas collection bag; 2. Fixing plate; 3. Fixing block; 4. Limiting plate; 5. Side plate; 6. Connecting strip; 7. Extension plate; 8. Extension groove; 9. Through hole; 10. Auxiliary fixing component; 11. Auxiliary fixing plate; 12. Fixing hole; 13. Gas nozzle; 14. Fixing post; 15. Connecting ring; 16. First self-locking telescopic rod; 17. Base; 18. Top cover; 19. Second self-locking telescopic rod; 20. Groove; 21. Partition; 22. Adjusting knob; 23. Gear; 24. Rack plate; 25. Limiting ring; 26. Support plate. 26. Control rod; 27. Strip hole; 28. Fixing ring; 29. ​​Sealing ring; 30. Annular groove; 31. Insert post; 32. Insertion hole; 33. Fixing sleeve; 34. Hole; 35. Water tank; 36. Water pump; 37. Water outlet pipe; 38. Water inlet pipe; 39. Protective plate; 40. Air pump; 41. Storage battery; 42. Universal joint; 43. Limiting groove; 44. Cylindrical shell; 45. Baffle plate; 46. First spring; 47. Guide shell; 48. Positioning rod; 49. Second spring; 50. Positioning post; 51. Positioning groove; 52. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Unless otherwise specified, the technical means used in the implementation examples are conventional means well known to those skilled in the art.

[0042] refer to Figures 1-8 This invention discloses a portable device for collecting volatile odor molecules from plant flowers, comprising a gas collection bag 1 and a size-adjustable collection box. The size-adjustable design refers to the adjustable length and width of the collection box, allowing for the collection of VOCs from flowers of different sizes. It should be understood that the collection box can accommodate flowers within a certain size range, but not all sizes. However, by adjusting the size of the collection box, it can collect larger flowers, such as sunflowers. The gas collection bag 1 is detachably fixed inside the collection box. The volume of the gas collection bag 1 is greater than or equal to the maximum size of the collection box to accommodate changes in the collection box size. That is, when the collection box size changes, since the gas collection bag is larger than the collection box, the increase in the collection box size does not affect the gas collection bag. Specifically, when the collection box size is adjusted to its maximum, the gas collection bag size can fit perfectly with the collection box, or be slightly larger (within a range of 1-2 cm) without affecting its use. To ensure better fit between the gas collection bag and the collection box, the shape of the gas collection bag is preferably consistent with the shape of the collection box. The length of the gas collection bag is greater than the height of the collection box, which makes it easier to seal and fix the open end of the gas collection bag.

[0043] Furthermore, to secure the gas collection bag within the collection box, a fixing member is horizontally arranged on the inner wall of the collection box, and a fixing piece 2 inserted into the fixing member is provided on the outer wall of the gas collection bag 1. A fixing block 3 is inserted into one side of the fixing member and presses and secures the fixing piece 2. The bottom opening of the gas collection bag 1 extends outside the collection box. When the plant flower is inside the gas collection bag 1, the bottom opening of the gas collection bag 1 is fixed to the stem of the plant by a sealing member. It should be noted that multiple fixing members are provided, the number of which is set according to the height of the collection box. The fixing members are composed of two vertically parallel limiting pieces 4, one of which has an insertion hole. The fixing block 3 has a T-shaped cross-section, and its vertical part is inserted into the insertion hole to press and secure the fixing piece 2 inserted between the two limiting pieces 4. As a preferred embodiment, the collection box is square, more preferably a cube, and the fixing members are provided on each side wall inside the collection box. The number of fixing pieces 2 is the same as the number of fixing members and they are correspondingly arranged. As a preferred embodiment, the fixing element is located on the inner side wall of the data collection box near its top and bottom, such as... Figure 8 As shown. The position and number of fixing pieces 2 correspond to and are the same as those of the fixing component, facilitating the insertion of the fixing pieces into the opening of the fixing component, i.e., between the two limiting pieces. Then, the fixing block is inserted to press and fix the fixing pieces. In one embodiment, the fixing pieces and fixing blocks are preferably made of rubber to facilitate the fixing of the fixing pieces. To further increase the stability of the fixing pieces, a strip groove is provided on the surface of the fixing pieces corresponding to the insertion hole. When the fixing block is inserted into the insertion hole, one end of the fixing block is inserted into the strip groove, thereby better fixing the fixing pieces.

[0044] Furthermore, to facilitate the installation of the gas collection bag into the collection box, the fixing block on the top fixing component of the collection box is set on the upper limiting plate, and the fixing block on the bottom fixing component of the collection box is set on the lower limiting plate, as shown below. Figure 8 As shown. Meanwhile, the length of the fastener determines how securely the fixing plate is fixed. Therefore, the lengths of the fastener and the fixing plate should be set according to the actual situation (such as the length and width of the collection box and gas collection bag).

[0045] Furthermore, in this invention, the collection box includes four side plates 5, which form a square. An extension member is provided between adjacent side plates 5 to connect them and increase their size. Specifically, the extension member includes a connecting strip 6 with a fan-shaped cross-section. The fan shape is just one implementation; it can also be triangular, mainly to adapt to the triangular area between adjacent side plates. The central angle of the connecting strip is 90°. Extension plates 7 are provided on both sides of the connecting strip 6, with a 90° angle between them. An extension groove 8 is provided on the side wall of the side plate 5 for inserting the extension plate 7. Through holes 9 communicating with the extension groove 8 are provided on the outer wall surface of the side plate 5 near its sides. A positioning mechanism for the extension plate 7 to abut against the through holes is provided at the through holes. Figure 3 , Figure 4 As shown, in the initial state, the extension plate is completely placed in the extension groove; when the size of the acquisition box is adjusted, the connecting strip between the adjacent side plates pulls the extension plate out of the extension groove. After the size of the acquisition box is adjusted, the positioning mechanism is released, so that the positioning post 51 on the positioning mechanism passes through the through hole 9 and presses against the surface of the extension plate 7 to prevent the extension plate from moving into the extension groove, thereby fixing the extension plate. Specifically: The positioning mechanism includes a cylindrical shell 45 fixed above the through hole 9. A positioning post 51 is inserted into the center of the cylindrical shell 45. One end of the positioning post 51 is outside the cylindrical shell 45, and the other end of the positioning post 51 extending into the cylindrical shell 45 corresponds to the through hole 9. The diameter of the positioning post 51 is smaller than the diameter of the through hole. A first spring 47 is sleeved on the part of the positioning post 51 extending into the cylindrical shell 45. A gasket 46 is sleeved on the positioning post 51. One end of the first spring 47 abuts against the gasket 45. The distance between the gasket 46 and the end of the positioning post 51 is greater than the distance between the through hole 9 and the extension plate 7, so that the positioning post 51 can be successfully pressed against the surface of the extension plate 7 under the action of the first spring 47.

[0046] Furthermore, to loosen the fixation of the extension plate, the top surface of the cylindrical shell 45 is provided with a guide shell 48 that opens towards the positioning post 51. A positioning rod 49, with one end extending out of the opening of the guide shell 48, is provided inside the guide shell 48. A positioning groove 52 is provided on the side wall of the positioning post 51 for the positioning rod 49 to extend into. A second spring 50 is provided at one end of the positioning rod 49 located inside the guide shell 48, and the other end of the second spring 50 is fixed to the inner wall of the guide shell 48. It should be noted that: Figure 4 , Figure 5As shown, when the positioning rod 49 is inserted into the positioning groove 52, the first spring 47 is in a compressed state. Simultaneously, one end of the positioning pin 51 can be positioned above the through hole or partially inserted into the through hole, without contacting the extension plate. When it is necessary to fix the extension plate, the positioning rod is pulled out of the positioning groove. Under the action of the first spring, the positioning pin moves towards the through hole until it abuts against the extension plate, thus securing it. Additionally, to facilitate the removal of the positioning rod, a pull rope is connected to one end of the positioning rod located inside the guide housing. The other end of the pull rope extends outside the guide housing. Pulling the pull rope disengages one end of the positioning rod from the positioning groove, at which point the second spring is in a compressed state. One end of the positioning rod abuts against the outer wall of the positioning rod. When it is necessary to release the pressure on the extension plate, the positioning pin is pulled out directly. When the positioning groove and positioning rod align, the positioning rod extends into the positioning groove under the action of the second spring, thereby fixing the positioning pin, and the first spring returns to a compressed state.

[0047] Furthermore, to better secure the gas collection bag, an auxiliary fixing member 10 is provided on the side wall of the connecting strip 6 along its axis. The auxiliary fixing member 10 is vertically positioned along the axis of the connecting strip 6. The structure of the auxiliary fixing member 10 is the same as that of the fixing member. An auxiliary fixing piece 11, inserted into the auxiliary fixing member 10, is vertically positioned on the side wall of the gas collection bag 1. This ultimately secures the four edges of the gas collection bag, thereby increasing its stability within the collection box. Figure 3 As shown, in the initial state, in order not to affect the setting of the auxiliary fixing component 10, the edge at the axis of the connecting strip is rounded. At the same time, the corresponding longitudinal edges between adjacent side plates are also rounded, leaving a gap for the auxiliary fixing component 10 to pass through.

[0048] Furthermore, to enable ventilation inside the gas collection bag, fixing holes 12 are provided through any two of the side plates 5, with a height difference between the two fixing holes. The specific positions can be set according to actual requirements. A nozzle 13, communicating with the gas collection bag 1, is provided at a position corresponding to the fixing hole 12, extending out of the side plate 5 through the fixing hole 12. By connecting an inlet pipe and an outlet pipe to the two nozzles, and combining them with an air pump, VOCs from the flowers can be collected. Alternatively, a nozzle can be directly installed at the top of the gas collection bag without passing through the side plate, achieving gas collection as needed.

[0049] Furthermore, after the collection box is fixed to the flower, to support the collection box and prevent its weight from breaking the flower stem, at least two of the side plates 5 have support members on their outer walls. Each support member includes a fixing post 14 fixed to the outer wall of the side plate 5, with a connecting ring 15 fitted onto the fixing post 14. A universal joint 43 is located at the bottom of the connecting ring 15, and a first self-locking telescopic rod 16 is located at the other end of the universal joint 43. It should be noted that when support members are installed on only two side plates, they are located on the outer walls of the two corresponding side plates, near the top of the side plates. The universal joint allows for multi-angle adjustment of the direction of the first self-locking telescopic rod to adapt to different environments. The first self-locking telescopic rod 16 is an existing device with a pointed bottom for easy insertion into the soil to support and fix the collection box. The self-locking function of the first self-locking telescopic rod 16 allows the collection box to be fixed at different heights, thus adapting to flowers of varying heights.

[0050] Furthermore, such as Figures 12-14 As shown, after the flower is inserted into the gas collection bag inside the collection box, a sealing element is used to seal and secure the bottom opening of the gas collection bag. Simultaneously, to fix the open end of the gas collection bag to the sealing element, an annular channel with one side opening is provided at the opening of the gas collection bag, or the open end of the gas collection bag can be turned outwards to form an annular channel with one side opening. A drawstring is installed inside the annular channel, and pulling the drawstring tightens and secures the gas collection bag to the sealing element.

[0051] Specifically: The sealing element includes a fixing ring 29 and a sealing ring 30. The fixing ring and the sealing ring are the same shape and size. One side of the fixing ring 29 and the sealing ring 30 is in a disconnected state that is connected to its center. At the same time, the sealing ring and the fixing ring are made of rubber, which makes it easy to pry open the disconnected side of the sealing ring and the fixing ring to allow the stem of the flower to pass through. The top of the fixing ring 29 and the bottom of the sealing ring 30 are respectively provided with annular grooves 31 communicating with their central holes. Multiple insertion posts 32 are arranged around the center of the bottom of the fixing ring 29. The sealing ring 30 is provided with insertion holes 33 corresponding to the insertion posts 32. A fixing sleeve 34 is coaxially arranged in the annular groove 31 of the sealing ring 30. The fixing sleeve 34 is also in a broken state, and the break point is consistent with the break point on the sealing ring 30. The gas collection bag 1 is provided with holes 35 for the insertion posts 32 to pass through. In use, the fixing ring 29 is located inside the gas collection bag 1, and the stem of the flower passes through the broken part of the fixing ring, so that the fixing ring is fitted onto the stem of the flower. Then, a soft plug, broken on one side, is inserted into the annular groove 31 of the fixing ring 29, so that the soft plug is fitted onto the stem. The soft plug is preferably made of foam or sponge to avoid damage to the stem of the plant. At the same time, the soft plug seals the stem with the fixing ring, preventing gaps between the stem and the fixing ring that could lead to air leakage. Subsequently, the insertion post 32 is inserted through the hole 35 on the gas collection bag 1, and the open end of the gas collection bag is closed. Then, a sealing ring 30 is installed, located outside the gas collection bag 1. The insertion post 32 is inserted through the insertion hole 33 to fix the fixing ring and the sealing ring. The closed gas collection bag 1 is then passed through the center of the sealing ring 30 and protrudes from the opening end of the fixing sleeve. The opening of the gas collection bag is opened and folded outwards towards the fixing sleeve, and the drawstring is tightened and tied to the side wall of the fixing sleeve 34. An annular groove can be provided on the outer wall of the fixing sleeve to facilitate drawstring fixation and increase its firmness. Finally, a sealing plug is inserted into the fixing sleeve 34. The sealing plug is also a ring structure with one side broken, and can be made of foam, sponge, or rubber. This compresses and fixes the gas collection bag inside the fixing sleeve, while also sealing and fixing the flower stem. Finally, the opening end of the gas collection bag is sealed and fixed.

[0052] Furthermore, such as Figures 9-11As shown, to demonstrate the portability of the collection box and its usability in the field, the collection box is housed within a portable case. The portable case includes a base 17 and a top cover 18 inserted into the base 17. The top surface of the base has an annular limiting groove 44, and the bottom opening of the top cover is inserted into the limiting groove 44, thereby securing the base and top cover. The top cover has a certain height, exceeding the height of the collection box. The bottom of the base 17 has multiple second self-locking telescopic rods 19 to secure the base to the ground in the field, and can be adapted to the height of the flowers, fixing them at different heights. A groove 20 is formed at the center of the top of the base 17, and the collection box is placed within the groove 20. An adjusting element is provided within the groove 20 to control the size of the collection box, allowing adjustment of the box's dimensions.

[0053] Furthermore, the shape of the groove is consistent with the external shape of the collection box. A partition 21 is horizontally arranged inside the groove 20. The adjusting component is arranged in the area enclosed by the partition 21 and the groove 20. The adjusting component includes an adjusting knob 22. One end of the adjusting knob 22 is fixed to the bottom center of the partition 21 by a bearing, and the other end extends out of the bottom of the base 17 and is fixed by a bearing. The adjusting knob 22 is located inside the groove 20. Two gears 23 are fixedly mounted on the adjusting knob 22 from top to bottom. Each gear 23 is meshed with a set of transmission components. The two sets of transmission components are arranged vertically in space. Each set of transmission components includes two rack plates 24. The two rack plates 24 are centrally symmetrical and mesh with the two sides of the gear 23 respectively.

[0054] Furthermore, the bottom of the partition 21 and the bottom of the groove 20 are respectively provided with limiting rings 25 corresponding to each rack plate 24. Each rack plate 24 passes through its corresponding limiting ring 25 and is in clearance fit, so that the rack plate reciprocates linearly under the action of the limiting ring, which provides support and guidance for the rack plate. A support plate 26 is provided on the side wall of the end of each rack plate 24 away from the gear 23. A control rod 27 is vertically provided on the support plate 26. The control rods 27 on each set of transmission components are correspondingly provided, and their axes are on the same straight line as the axis of the adjusting knob 22. The control rod 27 passes through the partition 21, and the partition 21 is provided with a strip hole 28. The strip hole 28 is consistent with the running trajectory of the control rod 27. As one embodiment, in order to save space and better adjust the size of the collection box, the four control rods are set towards the four corners of the groove to increase the movement distance of the control rods without increasing the size of the base. Figure 11As shown, the axes of the control components and the adjustment knob on the rack plate, which are located on the same plane, are aligned. This allows the adjustment knob to rotate simultaneously, driving two gears to rotate, which in turn drives two sets of transmission components to move linearly. Ultimately, this enables the rack plate on the same plane to move the control levers apart or towards each other. When the collection box is placed in the groove, all four control levers are located inside the collection box, at its four corners. When the adjustment knob is rotated, the control levers move towards the four corners of the groove, thus opening the collection box and adjusting its size. Whether the gas collection bag is fixed inside the collection box during this process does not affect the adjustment of the collection box size. After the collection box size is adjusted, the gas collection bag is fixed inside the collection box, or the gas collection bag is already fixed inside the collection box before adjusting its size. Then, a positioning pin is inserted into the through hole to stabilize the extension plate. Next, place the collection box with the gas collection bag over the flower, with the flower inside the gas collection bag. The position of the flower inside the gas collection bag can be controlled according to the actual situation. Then, operate the first self-locking telescopic rod and adjust its length according to the height of the flower to fix it on the ground and support the collection box. Then, use the fixing ring and sealing ring to seal and fix the bottom opening of the gas collection bag, thus completing the fixation of the collection box on the flower.

[0055] This invention also discloses a collection system based on a portable plant flower volatile odor molecule collection device. A water tank 36 is installed on the outer wall of the base 17, and a water pump 37 is installed on the water tank 36. The water pump 37 has an outlet pipe 38 and an inlet pipe 39, with the inlet pipe 39 connected to the water tank 36. A protective plate 40 is installed on the side wall of the top cover 18, and an air pump 41 is installed at the bottom of the protective plate 40. The air pump 41 is connected to an inlet pipe and an outlet pipe, which are respectively connected to an air nozzle 13. A filter module is installed on the inlet pipe, and an adsorption tube is installed on the outlet pipe. The air pump 41 and the water pump 37 are respectively connected to a battery 42 and a controller. In use, the base is fixed to the ground by the action of a second self-locking telescopic rod and serves as a carrier for the air pump and other related devices. The protective plate can provide some rain protection, except in inclement weather. In this invention, GPS sensors, temperature sensors, and humidity sensors can be set as needed and monitored by a controller.

[0056] In this invention, the collection box and connecting strips are made of PTFE or PMMA, and the gas collection bag is also made of a transparent material, such as PTFE. The air pump is a miniature pump, and the filter module can be a dual-stage filter module (activated carbon + molecular sieve) to ensure purified air enters the gas collection bag. Simultaneously, a mass flow sensor and electronic valve can be installed on the inlet pipe to regulate the flow rate (e.g., 10-150 mL / min) and connect to the controller. The adsorption tube uses adsorption materials such as Tenax-TA and Carbograph, and the interface automatically seals after sampling to prevent leakage.

[0057] To clean the air inlet and outlet pipes, the tubing on the air pump can be directly removed and connected to the water outlet pipe for cleaning. The gas collection bag can be cleaned and reused or replaced. Note that the water tank is equipped with a water inlet pipe, and a three-way valve is installed at the connection between the water inlet pipe and the water tank. The water inlet pipe connects to the three-way valve, and the other port of the three-way valve is connected to a drain pipe for easy adding or draining of water from the tank.

[0058] When the device and system disclosed in this invention are used in the field, the target flower, along with some branches and leaves, is placed in a gas collection bag and sealed. After the sampling program is started, the air pump delivers purified air into the gas collection bag at a set flow rate. The volatiles in the gas collection bag are carried to the adsorption tube and enriched. After sampling is completed, the system automatically closes the valve and performs a cleaning procedure under manual operation. After the sample adsorption tube is removed, it can be directly desorbed in the laboratory for GC-MS analysis.

[0059] After sample collection is complete, remove the collection box. The removal sequence depends on the operator's personal habits and the actual situation. After removal, pull the positioning column outwards until the positioning rod is inserted into the positioning slot to fix the positioning column. Manually close all the side panels of the collection box, then reset the control rod using the adjustment knob. Finally, place the collection box into the groove. At this point, the control rod is inserted into the collection box. After all components are in place, the device can be moved by the handle on the top cover for portability.

[0060] In practical applications, the collection device and system disclosed herein are installed on the flowers when they are half-open. The main volatile compounds of Cypripedium brevis and rose flowers are measured between 10 and 11 a.m. on a sunny day, as shown in Tables 1 and 2 below.

[0061] Table 1. Determination of major volatile compounds in Cypripedium sylvestris flowers.

[0062]

[0063] Table 2. Determination of major volatile compounds in rose petals.

[0064]

[0065]

[0066] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0067] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A portable device for collecting volatile odor molecules from plant flowers, characterized in that: The device includes a gas collection bag (1) and a collection box with adjustable size. The gas collection bag (1) is detachably fixed inside the collection box. The volume of the gas collection bag (1) is greater than or equal to the maximum size of the collection box. A fixing member is horizontally arranged on the inner wall of the collection box. A fixing piece (2) inserted into the fixing member is arranged on the outer wall of the gas collection bag (1). A fixing block (3) is inserted into one side of the fixing member and presses and fixes the fixing piece (2). The bottom opening of the gas collection bag (1) extends out of the collection box. When the flower of the plant is inside the gas collection bag (1), the bottom opening of the gas collection bag (1) is fixed to the stem of the plant by a sealing member.

2. The portable device for collecting volatile odor molecules from plant flowers according to claim 1, characterized in that: The fastener is provided in multiple parts, consisting of two parallel upper and lower limiting pieces (4). One of the limiting pieces (4) has an insertion hole. The cross-section of the fixing block (3) is T-shaped, and its vertical part is inserted into the insertion hole to press and fix the fixing piece (2) inserted between the two limiting pieces (4). The collection box is square, and the fixing members are set on each side wall inside the collection box. The number of fixing pieces (2) is the same as the number of fixing members, and they are set accordingly.

3. The portable device for collecting volatile odor molecules from plant flowers according to claim 2, characterized in that: The collection box includes four side plates (5), which form a square. An extension is provided between adjacent side plates (5). The extension includes a connecting strip (6) with a fan-shaped cross section. An extension plate (7) is provided on both sides of the connecting strip (6). An extension groove (8) is provided on the side wall of the side plate (5) for the extension plate (7) to be inserted. A through hole (9) communicating with the extension groove (8) is provided on the outer wall of the side plate (5) near its two sides. A positioning mechanism for the extension plate (7) to be pressed against is provided at the through hole.

4. The portable device for collecting volatile odor molecules from plant flowers according to claim 3, characterized in that: An auxiliary fixing member (10) is provided on the side wall of the connecting strip (6) along its axis. The auxiliary fixing member (10) is arranged along the axis of the connecting strip (6). The structure of the auxiliary fixing member (10) is the same as that of the fixing member. An auxiliary fixing piece (11) is vertically arranged on the side wall of the gas collection bag (1) and inserted into the auxiliary fixing member (10).

5. A portable device for collecting volatile odor molecules from plant flowers according to claim 3, characterized in that: Fixing holes (12) are provided through any two of the side plates (5). A gas nozzle (13) communicating with the gas collection bag (1) is provided at a position corresponding to the fixing hole (12). The gas nozzle (13) extends out of the side plate (5) through the fixing hole (12).

6. A portable device for collecting volatile odor molecules from plant flowers according to claim 3, characterized in that: Support members are provided on the outer walls of at least two of the side plates (5). The support members include fixed columns (14) fixed on the outer walls of the side plates (5). A connecting ring (15) is sleeved on the fixed column (14). A universal joint (43) is provided at the bottom of the connecting ring (15). A first self-locking telescopic rod (16) is provided at the other end of the universal joint (43).

7. The portable device and system for collecting volatile odor molecules from plant flowers according to claim 1, characterized in that: The collection box is set inside the portable case, which includes a base (17) and a top cover (18) inserted into the base (17). The bottom of the base (17) is provided with a plurality of second self-locking telescopic rods (19), and the top of the base (17) is provided with a groove (20). The collection box is set in the groove (20), and the groove (20) is provided with an adjusting component for controlling the size adjustment of the collection box.

8. A portable device and system for collecting volatile odor molecules from plant flowers according to claim 7, characterized in that: A partition (21) is horizontally arranged in the groove (20). The adjusting member is arranged in the area enclosed by the partition (21) and the groove (20). The adjusting member includes an adjusting knob (22). One end of the adjusting knob (22) is fixed to the bottom center of the partition (21) by a bearing, and the other end extends out of the bottom of the base (17) and is fixed by a bearing. The adjusting knob (22) is located in the groove (20). Two gears (23) are fixed from top to bottom on the adjusting knob (22). Each gear (23) is meshed with a set of transmission components. The two sets of transmission components are arranged vertically in space. Each set of transmission components includes two rack plates (24). The two rack plates (24) are arranged in a central symmetrical manner and mesh with the two sides of the gear (23) respectively. The bottom of the partition (21) and the bottom of the groove (20) are respectively provided with a limiting ring (25) corresponding to each rack plate (24). Each rack plate (24) passes through the corresponding limiting ring (25) and is in clearance fit. A support plate (26) is provided on the side wall of the end of each rack plate (24) away from the gear (23). A control rod (27) is vertically provided on the support plate (26). The control rod (27) on each set of transmission components is correspondingly provided and its axis is on the same straight line as the axis of the adjusting knob (22). The control rod (27) passes through the partition (21). A strip hole (28) is provided on the partition (21). The running trajectory of the strip hole (28) is consistent with that of the control rod (27).

9. A portable device and system for collecting volatile odor molecules from plant flowers according to claim 1, characterized in that: The sealing element includes a retaining ring (29) and a sealing ring (30). One side of the retaining ring (29) and the sealing ring (30) is in a disconnected state, communicating with their center. The top of the retaining ring (29) and the bottom of the sealing ring (30) are respectively provided with annular grooves (31) communicating with their center holes. The bottom of the retaining ring (29) is provided with a plurality of inserts (32) around its center. The sealing ring (30) is provided with insert holes (33) corresponding to the inserts (32). A retaining sleeve (34) is coaxially provided in the annular groove (31) of the sealing ring (30). The retaining sleeve (34) is also in a disconnected state, and the disconnection position is related to the center hole of the sealing ring (30). The breaks on the sealing ring (30) are consistent; the gas collection bag (1) is provided with a hole (35) for the insertion post (32) to pass through; in use, the fixing ring (29) is located inside the gas collection bag (1), and a soft plug with one side broken is inserted into the annular groove (31) of the fixing ring (29). The sealing ring (30) is located outside the gas collection bag (1). The hole (35) on the gas collection bag (1) passes through the insertion post (32) and the insertion post (32) passes through the insertion hole (33), so that the open end of the gas collection bag (1) passes through the center of the sealing ring (30) and is tied to the side wall of the fixing sleeve (34). Then, a sealing plug is inserted into the fixing sleeve (34).

10. A collection system based on the portable plant flower volatile odor molecule collection device of claim 7, characterized in that: A water storage tank (36) is provided on the outer wall of the base (17), and a water pump (37) is provided on the water storage tank (36). The water pump (37) is provided with an outlet pipe (38) and an inlet pipe (39). The inlet pipe (39) is connected to the water storage tank (36). A protective plate (40) is provided on the side wall of the top cover (18). An air pump (41) is provided at the bottom of the protective plate (40). An air inlet pipe and an air outlet pipe are connected to the air pump (41). The air inlet pipe and the air outlet pipe are respectively connected to the air nozzle (13). A filter module is provided on the air inlet pipe. An adsorption pipe is provided on the air outlet pipe. The air pump (41) and the water pump (37) are respectively connected to the battery (42) and the controller.

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