Plant leaf gas flux measurement frame

Abstract

The utility model relates to a kind of plant leaf gas flux measurement frame, its structure includes air chamber, cover plate, first connecting plate, second connecting plate, spring hinge, first flexible gasket and second flexible gasket, air chamber and cover plate are oppositely arranged, first flexible gasket and second flexible gasket are set between air chamber and cover plate, and the end surface of first flexible gasket is sealedly connected with the board surface of cover plate, the end surface of second flexible gasket is sealedly connected with air chamber, first connecting plate and second connecting plate are set between air chamber and cover plate, and first connecting plate is connected with cover plate edge, second connecting plate is connected with air chamber edge, first connecting plate and second connecting plate are connected with each other by spring hinge;First air inlet and first gas outlet are set on air chamber.The utility model can be measured with gas flux detection device to obtain the corresponding gas flux of measurement area, and the gas flux per unit area of leaf can be obtained by calculation.

Description

Technical Field

[0001] This utility model relates to an in-situ plant measurement device, specifically a plant leaf gas flux measurement frame. Background Technology

[0002] Existing in-situ measurement methods generally measure the entire plant. For example, Chinese patent CN222085791U describes a wetland greenhouse gas flux detection device for tall emergent plants. This device uses a transparent assimilation chamber to cover the entire emergent plant, which is connected to the gas flux detection device via inlet and outlet pipes to measure the gas flux of the entire plant. To achieve more accurate assessment of regional gas flux, it is sometimes necessary to measure the gas flux per unit leaf area. However, existing flux measurement devices cannot measure the gas flux per unit leaf area. Utility Model Content

[0003] The purpose of this invention is to provide a plant leaf gas flux measurement frame to solve the problem that existing flux measurement devices cannot measure the gas flux per unit leaf area of ​​plants.

[0004] This utility model is implemented as follows: A plant leaf gas flux measuring frame includes an air chamber, a cover plate, a first connecting plate, a second connecting plate, a spring hinge, a first flexible washer, and a second flexible washer. The air chamber and the cover plate are arranged opposite to each other. The first flexible washer and the second flexible washer are disposed between the air chamber and the cover plate, and the end face of the first flexible washer is sealed to the surface of the cover plate, and the end face of the second flexible washer is sealed to the air chamber. The first connecting plate and the second connecting plate are disposed between the air chamber and the cover plate, and the first connecting plate is connected to the edge of the cover plate, and the second connecting plate is connected to the edge of the air chamber. The first connecting plate and the second connecting plate are connected to each other through the spring hinge. A first air inlet and a first air outlet are provided on the air chamber.

[0005] As a further improvement to the plant leaf gas flux measurement frame of this utility model, a gasket plate is provided at the port of the gas chamber, and the second flexible gasket is sealed to the gasket plate.

[0006] As a further improvement to the plant leaf gas flux measurement frame of this utility model, the cover plate, air chamber, first flexible washer and second flexible washer are all rectangular in shape.

[0007] As a further improvement to the plant leaf gas flux measurement frame of this utility model, the cross-sections of the first flexible washer and the second flexible washer are both rectangular.

[0008] As a further improvement to the plant leaf gas flux measurement frame of this utility model, both the first flexible washer and the second flexible washer include an elastic deformation form and a sealing film wrapped around the elastic deformation form.

[0009] As a further improvement to the plant leaf gas flux measurement frame of this utility model, the elastic deformation form is memory foam, and the sealing film is PVC film or PE film.

[0010] As a further improvement to the plant leaf gas flux measurement frame of this utility model, a second air inlet and a second air outlet are provided on the cover plate, and the first air outlet and the second air inlet are connected by a flexible hose.

[0011] As a further improvement to the plant leaf gas flux measurement frame of this utility model, quick connectors are provided on the first air inlet and the first air outlet respectively.

[0012] As a further improvement to the plant leaf gas flux measuring frame of this utility model, a first handle and a second handle are respectively provided on the cover plate and the air chamber near the spring hinge.

[0013] As a further improvement to the plant leaf gas flux measurement frame of this utility model, both the gas chamber and the cover plate are made of transparent material.

[0014] This invention can measure the gas flux in a portion of a blade. By dividing the measured gas flux in a portion of the blade by the area corresponding to the measurement area, the gas flux per unit area of ​​the blade can be obtained.

[0015] This invention uses a flexible washer to clamp the blade, thereby sealing the measurement area. The measurement area is connected to the gas chamber, which is equipped with a first air inlet and a first air outlet for connection to a gas flux detection device. The first air inlet and the first air outlet are connected to the gas flux detection device through pipelines. The gas flux detection device can measure the corresponding gas flux in the measurement area, and the gas flux per unit area of ​​the blade can be obtained by calculation.

[0016] Alternatively, a flexible hose can be used to connect the air chamber and the cover plate, and then connected to a gas flux detection device to connect the upper and lower surfaces of the blade, thus avoiding pressure imbalance between the upper and lower surfaces of the blade.

[0017] The spring hinge can automatically bring the first flexible washer and the second flexible washer closer together and clamp them, and limit them through the first connecting plate and the second connecting plate, so that the cover plate and the air chamber remain parallel to each other in the clamped state. By setting flexible washers of different thicknesses, the squeezing pressure of the flexible washers on the blade surface can be controlled, so as to avoid excessive squeezing pressure from affecting the blade while ensuring the sealing.

[0018] The flexible gasket consists of an elastic shape made of memory foam and a sealing film made of PVC or PE film wrapped around the elastic shape. This combination provides the softness of memory foam, ensuring that it will not compress the fence and sponge structures of the blades, while also providing the conformability and sealing of the PVC or PE film. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the present invention.

[0020] Figure 2 This is a cross-sectional view of the present invention.

[0021] Figure 3 This is a top view of the present invention.

[0022] Figure 4 yes Figure 1 Top view after removing the upper structure.

[0023] Figure 5 This is a structural diagram of the cross-section of a flexible gasket.

[0024] Figure 6 This is a schematic diagram of another structure of this utility model.

[0025] Figure 7 This is a structural diagram of another dimension of this utility model.

[0026] In the diagram: 1. Air chamber; 2. Cover plate; 3. First connecting plate; 4. Second connecting plate; 5. First flexible washer; 6. Second flexible washer; 7. Washer plate; 8. Spring hinge; 9. First air inlet; 10. First air outlet; 11. First handle; 12. Second handle; 13. Elastic deformation type; 14. Sealing membrane; 15. Second air inlet; 16. Second air outlet; 17. Connecting pipe. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] Example 1

[0030] like Figures 1-4 As shown, this utility model is a plant leaf gas flux measurement frame, whose structure mainly includes an air chamber 1, a cover plate 2, a first connecting plate 3, a second connecting plate 4, a spring hinge 8, a first flexible washer 5, and a second flexible washer 6.

[0031] The measuring frame is divided into upper and lower parts. The upper part of the measuring frame includes a cover plate 2, a first flexible washer 5 and a first connecting plate 3. The lower part of the measuring frame includes an air chamber 1, a washer plate 7, a second flexible washer 6 and a second connecting plate 4. The upper and lower parts of the measuring frame are hinged by a spring hinge 8.

[0032] Air chamber 1 and cover plate 2 are arranged opposite to each other, with cover plate 2 located above air chamber 1. The outline of cover plate 2 is the same size and shape as that of air chamber 1, and their vertical positions correspond to each other. A first flexible gasket 5 is provided on the lower surface of cover plate 2, and a second flexible gasket 6 is provided on the upper part of air chamber 1. The first flexible gasket 5 and the second flexible gasket 6 are located between air chamber 1 and cover plate 2. The end face of the first flexible gasket 5 is bonded and sealed to the surface of cover plate 2, and the end face of the second flexible gasket 6 is bonded and sealed to air chamber 1. The first flexible gasket 5 and the second flexible gasket 6 have the same shape and outline, and their vertical positions correspond to each other.

[0033] A gasket plate 7 is provided at the port of the air chamber 1, and a second flexible gasket 6 is bonded and sealed to the gasket plate 7. The shape of the gasket plate 7 is consistent with the projected shape of the second flexible gasket 6, and the space in the middle of the second flexible gasket 6 is connected to the air chamber 1.

[0034] A first connecting plate 3 extending downwards is provided on the lower edge of the cover plate 2, and a second connecting plate 4 extending upwards is provided on the upper edge of the air chamber 1. The first connecting plate 3 and the second connecting plate 4 are located on the same side, and the first connecting plate 3 and the second connecting plate 4 have the same height. The first connecting plate 3 and the second connecting plate 4 are connected to each other by a spring hinge 8. The first hinge plate of the spring hinge 8 is fixed to the surface of the first connecting plate 3, and the second hinge plate of the spring hinge 8 is fixed to the surface of the second connecting plate 4.

[0035] When the two hinge plates are in the same plane, the first connecting plate 3 and the second connecting plate 4 are also in the same plane, and the end faces of the first connecting plate 3 and the second connecting plate 4 are in contact with each other. This allows the upper and lower parts of the measuring frame to open around the hinge axis. Under the action of the hinge spring, the upper and lower parts of the measuring frame move closer together and close. The first connecting plate 3 and the second connecting plate 4 limit the extreme position so that the air chamber 1 and the cover plate 2 are parallel to each other vertically.

[0036] Since the cover plate 2 and the air chamber 1 are parallel to each other in the closed state, the first flexible washer 5 and the second flexible washer 6 are also parallel to each other. The pressure between the first flexible washer 5 and the second flexible washer 6 is positively correlated with the thickness of the first flexible washer 5 and the second flexible washer 6 in the free state. The greater the thickness of the first flexible washer 5 and the second flexible washer 6 in the free state, the greater the compression deformation of the first flexible washer 5 and the second flexible washer 6 in the closed state, so the greater the pressure between the first flexible washer 5 and the second flexible washer 6.

[0037] A first air inlet 9 and a first air outlet 10 are provided on the gas chamber 1. The first air inlet 9 and the first air outlet 10 can be connected to a gas flux detection device through a flexible tube. Specifically, the gas flux detection device can be a licor-7810 portable greenhouse gas meter.

[0038] In one embodiment of this utility model, quick connectors are provided on the first air inlet 9 and the first air outlet 10 for easy connection. The quick connectors can be quickly connected to the hose.

[0039] The outer contours of the cover plate 2, air chamber 1, first flexible gasket 5 and second flexible gasket 6 are all rectangular.

[0040] like Figure 5 As shown, the cross-sections of the first flexible gasket 5 and the second flexible gasket 6 are both rectangular, making the upper and lower end faces of the flexible gaskets planes, which facilitates sealing and fitting with the cover plate 2 or gasket plate 7. The inner and outer sides of the flexible gaskets are also planes, which facilitates the calculation of the projected area of ​​the space in the middle of the flexible gasket.

[0041] The first flexible gasket 5 and the second flexible gasket 6 both include an elastic deformable part 13 and a sealing film 14 wrapped around the elastic deformable part 13.

[0042] Specifically, the elastic deformable part 13 is memory foam, and the sealing film 14 is a PVC film or a PE film. The PVC film is wrapped around the memory foam, so that the flexible gasket has both the softness of the memory foam, ensuring that it will not compress the fence structure and sponge structure of the blade, and the conformability and sealing properties of the PVC film, ensuring the airtightness of the device.

[0043] A first handle 11 and a second handle 12 are respectively provided on the side of the cover plate 2 and the air chamber 1 near the spring hinge 8. The first handle 11 and the second handle 12 facilitate the movement of the device and the opening and closing of the cover plate 2 and the air chamber 1.

[0044] Both the air chamber 1 and the cover plate 2 are made of transparent material.

[0045] Figures 1 to 4 This is a measuring frame specifically designed for measuring the gas flux per unit area of ​​blades. It is relatively small, and the dimensions of the inner edge of the flexible gasket can be determined as needed, such as 3cm × 4cm. The blade is clamped by the flexible gasket to seal the measuring area. The measuring area is connected to the gas chamber 1. The first air inlet 9 and the first air outlet 10 are connected to a gas flux detection device via pipelines. The gas flux detection device can measure the corresponding gas flux in the measuring area. After measuring the gas flux of a portion of the blade area, dividing it by the corresponding area of ​​the measuring area yields the gas flux per unit area of ​​the blade. Furthermore, the flux of the entire blade can be calculated based on the blade's area.

[0046] The measuring frame in this embodiment is generally used to measure the gas flux per unit area on one side of the blade, or for situations where the pores are concentrated on one side of the blade.

[0047] Example 2

[0048] When stomata are distributed on both sides of the blade, such as Figure 6 As shown, based on Embodiment 1, a second air inlet and a second air outlet are provided on the cover plate. The first air outlet of the air chamber is connected to the second air inlet on the cover plate via a flexible hose. The first air inlet on the air chamber and the second air outlet on the cover plate are respectively connected to a pipeline and a gas flux detection device. A flexible gasket clamps the blade to achieve a seal in the measurement area. A connecting pipe connects the upper and lower sides of the blade, thereby reducing pressure imbalance on both sides of the blade and allowing for the measurement of the flux on both sides of the blade.

[0049] The connecting pipe is a flexible tube.

[0050] The first air outlet and the second air inlet are both located near the side with the spring hinge. Thus, the connecting pipe between the first air outlet and the second air inlet is also located on the side with the spring hinge, and the connecting pipe will not affect the opening and closing of the air chamber and the cover plate.

[0051] Example 3

[0052] like Figure 7The image shows a measuring frame used to measure the methane flux of a whole leaf and the connection between the petiole and stem. It is relatively large, with the inner edge of the flexible gasket measuring 10cm × 80cm. The methane flux of the whole leaf and the connection between the petiole and stem is measured using this 10cm × 80cm measuring frame. Gaps at the stem can be sealed with modeling clay.

[0053] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A frame for measuring gas flux in plant leaves, characterized in that, The device includes an air chamber, a cover plate, a first connecting plate, a second connecting plate, a spring hinge, a first flexible washer, and a second flexible washer. The air chamber and the cover plate are disposed opposite each other. The first and second flexible washers are disposed between the air chamber and the cover plate, with the end face of the first flexible washer sealingly connected to the surface of the cover plate and the end face of the second flexible washer sealingly connected to the air chamber. The first and second connecting plates are disposed between the air chamber and the cover plate, with the first connecting plate connected to the edge of the cover plate and the second connecting plate connected to the edge of the air chamber. The first and second connecting plates are connected to each other via the spring hinge. A first air inlet and a first air outlet are provided on the air chamber.

2. The plant leaf gas flux measurement frame according to claim 1, characterized in that, A gasket plate is provided at the port of the air chamber, and the second flexible gasket is sealed to the gasket plate.

3. The plant leaf gas flux measurement frame according to claim 1, characterized in that, The cover plate, air chamber, first flexible gasket, and second flexible gasket are all rectangular in shape.

4. The plant leaf gas flux measurement frame according to claim 1, characterized in that, Both the first flexible washer and the second flexible washer have rectangular cross-sections.

5. The plant leaf gas flux measurement frame according to claim 1, characterized in that, Both the first flexible gasket and the second flexible gasket include an elastic deformable part and a sealing film wrapped around the elastic deformable part.

6. The plant leaf gas flux measurement frame according to claim 5, characterized in that, The elastic deformation material is memory foam, and the sealing film is a PVC film or a PE film.

7. The plant leaf gas flux measurement frame according to claim 1, characterized in that, The cover plate has a second air inlet and a second air outlet, and the first air outlet and the second air inlet are connected by a hose.

8. The plant leaf gas flux measurement frame according to claim 1, characterized in that, Quick connectors are provided on the first air inlet and the first air outlet, respectively.

9. The plant leaf gas flux measurement frame according to claim 1, characterized in that, A first handle and a second handle are respectively provided on the cover plate and the air chamber near the side of the spring hinge.

10. The plant leaf gas flux measurement frame according to claim 1, characterized in that, Both the air chamber and the cover plate are made of transparent material.

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