Light shield device for establishing dark environment for plant net primary productivity measurement
By designing a light hood device for gas flux detection devices, the problem of easy disengagement of the light shading material and difficulty in covering the high-level assimilation box is solved, and a fast and stable sealing and dark environment is established, ensuring accurate measurements sex.
Patent Information
- Application Number
- CN202421273751.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-06-05
AI Technical Summary
During the light-shielding process of the existing gas flux detection device, the light-shielding material is prone to detachment, and when the height of the assimilation box is high, it is difficult to cover the operation, resulting in inconvenient operation and inaccurate measurement.
A hood device including an operating rod, a top frame, a top cover, a guide rail and a blackout blind is designed. The top frame is fixed to the top of the assimilation box through the operating rod, and the blackout curtain is surrounded by a guide rail and a sliding mechanism to form a cylindrical shape. The fixing member is connected to the vertical side to ensure the light-shading effect and stability.
In the measurement of net primary productivity of tall plants, a sealed and dark environment is quickly and stably established for the assimilation box, avoiding the problems of disengagement of light-shielding materials and operating difficulties, and ensuring the accuracy of measurement and stability of use.
Smart Images
Figure CN222442504U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a gas flux detection device, in particular to a light shield device for establishing a dark environment for determining the net primary productivity of plants. Background Art
[0002] When measuring the net primary productivity of tall plants, a gas flux detection device is required. The gas flux detection device includes a cylindrical assimilation box and a gas flux detection instrument connected to the inner cavity of the assimilation box through a pipeline. Among them, the assimilation box is made of transparent material. When in use, the assimilation box is covered on the plant. The transparent side wall of the assimilation box does not affect the light, and the plants inside the assimilation box can perform photosynthesis. The net primary productivity of plants is: the carbon absorbed by the plant through photosynthesis per unit time minus the carbon loss of the plant's own respiration. To measure the net primary productivity of plants, it is necessary to simultaneously measure the gas concentration data when the plant in the assimilation box performs photosynthesis and the gas concentration data when the plant performs respiration in a dark environment. In order to facilitate the control of the time of the dark environment and ensure that the interior is a completely dark environment, the assimilation box needs to be shading. The current common shading method is to directly cover it with opaque cloth. However, this method has significant limitations. Due to the lack of effective fixing measures, when there is wind in the environment, the shading cloth is easy to shift or even fall off. Especially for tall plants, the assimilation boxes used are often correspondingly high, which makes the operators face great inconvenience and challenges when covering with cloth, greatly increasing the difficulty of operation. Utility Model Content
[0003] The purpose of the utility model is to provide a shading cover device for establishing a dark environment for determining the net primary productivity of plants, so as to solve the problems that the shading material is easy to fall off when the assimilation box of the gas flux detection device is shading, and the covering operation is difficult when the height of the assimilation box is high.
[0004] The utility model is implemented as follows: a light shield device for establishing a dark environment for measuring the net primary productivity of plants, comprising an operating rod, a top frame, a top cover, a guide rail and a light shielding curtain; the top frame is fixed to one side of the top of the operating rod, the top cover is made of a light-proof material and is arranged on the top frame, a circle of guide rails is arranged on the top frame, the light shielding curtain is made of a light-proof material, a plurality of hooks are arranged on the upper part of the light shielding curtain, the hooks are connected to the guide rails through a sliding mechanism, and the light shielding curtain can be pulled to enclose into a cylindrical shape or folded together.
[0005] As a further improvement of the light shield device for establishing a dark environment for determining the net primary productivity of plants according to the utility model, the top frame includes an upper ring and a lower ring with the same diameter and coaxially arranged, a plurality of vertical connecting rods are arranged between the upper ring and the lower ring, the operating rod is located on one side of the upper ring and the lower ring, and the operating rod is fixedly connected to the upper ring and the lower ring.
[0006] As a further improvement of the sunshade device for establishing a dark environment for determining the net primary productivity of plants according to the utility model, the upper end of the operating rod exceeds the upper ring, and an inclined support rod is connected to the operating rod, and the inclined support rod is connected to a side of the upper ring away from the operating rod.
[0007] As a further improvement of the light shield device for establishing a dark environment for determining net primary productivity of plants according to the utility model, the guide rail is fixedly connected to the lower ring.
[0008] As a further improvement of the light shield device for establishing a dark environment for determining the net primary productivity of plants of the utility model, fixing members for connecting and fixing the two vertical sides are arranged on the two vertical sides of the light shield curtain.
[0009] As a further improvement of the light shield device for establishing a dark environment for determining net primary productivity of plants according to the utility model, the fixing piece is a Velcro, a snap or a magnetic buckle.
[0010] As a further improvement of the light shielding device for establishing a dark environment for determining the net primary productivity of plants according to the utility model, slide grooves are respectively arranged on both sides of the guide rail, and the sliding mechanism includes a sliding frame, which is an inverted U-shaped structure. Two rollers are arranged on the sliding frame, and the rollers are located in the slide grooves. The hook is connected to the sliding frame.
[0011] As a further improvement of the light shield device for establishing a dark environment for determining the net primary productivity of plants according to the utility model, the cross section of the guide rail is an I-shaped or inverted T-shaped structure.
[0012] The utility model is a light shield device for establishing a dark environment for determining the net primary productivity of plants. When the gas flux detection device needs to be measured in a dark environment, the top frame with the top cover can be conveniently placed on the top of the assimilation box of the gas flux detection device through an operating rod, and then the light shielding curtain is pulled to enclose the light shielding curtain into a cylindrical shape, completely covering the entire assimilation box to form a strict light shield, which can effectively prevent external light from entering and form a completely dark environment inside. The utility model can be conveniently placed and removed through the operating rod. At the same time, because the top frame is sleeved on the top of the assimilation box, the utility model can be stably fixed on the assimilation box, and the utility model will not fall off the assimilation box in a windy environment.
[0013] In order to further ensure the shading effect and prevent the entry of external light, fixing parts are provided on the two vertical sides of the blackout curtain, and the two vertical sides are connected and fixed by the fixing parts, so that the blackout curtain will not be blown open in a windy environment.
[0014] The utility model has a simple structure and is easy to use, and can conveniently and quickly establish a sealed and dark environment for an assimilation box device for measuring the net primary productivity of tall plants, and can effectively prevent the utility model from falling off, thereby ensuring stability and reliability during use. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural diagram of the utility model.
[0016] Figure 2 It is the internal structure diagram of the utility model.
[0017] Figure 3 It is a bottom view of the guide rail and the sliding mechanism of the utility model.
[0018] Figure 4 It is a connection structure diagram of the guide rail and the sliding mechanism of the utility model.
[0019] Figure 5 It is a connection structure diagram of two vertical sides of the blackout curtain of the utility model.
[0020] In the figure: 1, operating lever; 2, top frame; 3, top cover; 4, guide rail; 5, blackout curtain; 6, hook; 7, sliding mechanism; 8, diagonal support rod; 9, fixing part; 2-1, upper ring; 2-2, lower ring; 2-3, vertical connecting rod; 4-1, slide groove; 7-1, sliding frame; 7-2, roller. DETAILED DESCRIPTION
[0021] The structure of the utility model is further described below in conjunction with the accompanying drawings.
[0022] like Figure 1 , Figure 2 As shown, the utility model is a light shield device for establishing a dark environment for determining the net primary productivity of plants, comprising an operating rod 1, a top frame 2, a top cover 3, a guide rail 4, and a light shielding curtain 5. The top frame 2 is fixed to one side of the top of the operating rod 1, the top cover 3 is made of a light-proof material and is arranged on the top frame 2, a circle of guide rails 4 is arranged on the top frame 2, the light shielding curtain 5 is made of a light-proof material, and a plurality of hooks 6 are arranged on the upper part of the light shielding curtain 5, the hooks 6 are connected to the guide rail 4 through a sliding mechanism 7, and the light shielding curtain 5 can be pulled to enclose the light shielding curtain 5 into a cylindrical shape or folded together.
[0023] Among them, the top frame 2 includes an upper ring 2-1 and a lower ring 2-2 of the same diameter and coaxially arranged, and a plurality of vertical connecting rods 2-3 are arranged between the upper ring 2-1 and the lower ring 2-2. The operating rod 1 is located on one side of the upper ring 2-1 and the lower ring 2-2, and the operating rod 1 is fixedly connected to the upper ring 2-1 and the lower ring 2-2. The diameter of the upper ring 2-1 and the lower ring 2-2 is slightly larger than the diameter of the assimilation box of the gas flux detection device. The entire top frame 2 can be driven to move by the operating rod 1. The top frame 2 can be buckled on the top of the assimilation box. The utility model can be stably fixed on the assimilation box under the action of its own gravity. When the utility model needs to be removed from the assimilation box, the top frame 2 can be lifted upward by the operating rod 1, and the top frame 2 can be removed from the top of the assimilation box.
[0024] Among them, a support frame is also provided in the upper ring 2-1. The support frame can be in a cross shape, a straight shape, etc., and is used to support the top of the assimilation box when the top frame is placed on the assimilation box.
[0025] Furthermore, when the top of the assimilation box is an open structure, a sealing layer is provided on the lower side of the circular ring 2-1 on the top frame. The sealing layer can be EVA soft foam. When the top frame is placed on the top of the assimilation box, the sealing between the top of the assimilation box and the top is ensured.
[0026] The blackout curtain 5 is mounted on the guide rail 4. When taking and placing the utility model, the blackout curtain 5 can be folded and stored along the guide rail 4 to one side. Since the folded blackout curtain 5 is located on one side, it will not interfere with the placement and removal of the top frame 2.
[0027] The upper end of the operating rod 1 exceeds the upper ring 2-1, and a diagonal brace 8 is connected to the operating rod 1, and the diagonal brace 8 is connected to the side of the upper ring 2-1 away from the operating rod 1. The diagonal brace 8 can improve the connection strength between the operating rod 1 and the top frame 2 and the structural strength of the overall structure.
[0028] In this embodiment, the top cover 3 covers the outside of the top frame 2, and the light shield opens or bypasses the structure at the part where the top frame 2 is connected to other structures. For example, at the connection position between the upper ring 2-1 and the diagonal support rod 8, the light shield opens at this position to allow the diagonal support rod 8 to pass through, but the opening position needs to be sealed with black tape or the like. As for the connection position between the operating rod 1 and the upper ring 2-1 and the lower ring 2-2, the light shield directly bypasses the operating rod 1, covers the operating rod 1 together, and the opening for the operating rod 1 to extend upward is sealed with black tape.
[0029] In addition, to ensure light blocking, the length of the top cover 3 is greater than the overall height of the top frame 2, so that the lower edge of the top cover 3 can exceed the lower end of the top frame 2, so that the lower part of the top cover 3 and the upper part of the blackout curtain 5 overlap with a certain width.
[0030] like Figure 3 As shown, the guide rail 4 is a circular ring structure as a whole, the diameter of the guide rail 4 is consistent with the diameter of the lower ring 2-2, and the guide rail 4 is fixedly arranged below the lower ring 2-2.
[0031] Since the shading curtain 5 is mounted on the circular guide rail 4, the shading curtain 5 can be unfolded along the circular guide rail 4 to form a cylindrical shape, or can be folded along the circular guide rail 4 to gather the shading curtain 5 together. The top frame 2 is placed on the top of the assimilation box and then the shading curtain 5 is unfolded, which is convenient for placing the top frame 2 and quickly obtaining a cylindrical shading cover, which greatly facilitates the shading operation of the gas flux detection device.
[0032] like Figure 5 As shown, as a further improvement of the sunshade device for establishing a dark environment for determining the net primary productivity of plants of the utility model, fixing parts 9 for connecting and fixing the two vertical sides are provided on the two vertical sides of the sunshade curtain 5. The two vertical sides of the sunshade curtain 5 enclosed in a cylindrical shape can be quickly connected by the fixing parts 9, so that a stable cylindrical structure can be formed, and the sunshade curtain 5 cannot be blown open even when the wind is strong, so that the accuracy of the measurement can be guaranteed. At the same time, due to the existence of the two vertical sides, the pipelines that need to be connected to the inner cavity of the assimilation box can be directly passed through the corresponding positions of the two vertical sides, and the setting of the sunshade will not be affected by the existing irregular pipelines.
[0033] The fixing member 9 may be a Velcro, a snap button or a magnetic button, and specifically may be a Velcro or the like.
[0034] like Figure 4 As shown, slide grooves 4-1 are respectively arranged on both sides of the guide rail 4, and the sliding mechanism 7 includes a sliding frame 7-1. The sliding frame 7-1 is an inverted U-shaped structure, and two rollers 7-2 are arranged on the sliding frame 7-1. The two rollers 7-2 are respectively located in the two slide grooves 4-1 on both sides of the guide rail 4, and the sliding frame 7-1 can move along the slide groove 4-1 through the two rollers 7-2.
[0035] The length of the blackout curtain 5 can be selected as needed. The blackout curtain 5 is connected to the sliding frame 7 - 1 via a hook 6 , which facilitates the replacement of the blackout curtain 5 .
[0036] The cross section of the guide rail 4 is an I-shaped or inverted T-shaped structure.
[0037] The utility model is a light shield device for establishing a dark environment for determining the net primary productivity of plants. When the gas flux detection device needs to measure in a dark environment, the light shielding curtain 5 is first folded together, and then the top frame 2 is lifted above the assimilation box by the operating rod 1, and the top frame 2 is placed on the top of the assimilation box, so that the top frame 2 is sleeved on the assimilation box, and then the light shielding curtain 5 is unfolded along the guide rail 4 to form a cylindrical shape, and the two vertical side edges of the light shielding curtain 5 are fixed to each other by the fixing member 9 to eliminate the gap between the two vertical side edges. After the measurement in the dark environment is completed, the fixing members 9 on the two vertical side edges of the light shielding curtain 5 are opened, and then the light shielding curtain 5 is folded along the guide rail 4, and the top frame 2 is lifted above the top of the assimilation box by the operating rod 1, and the utility model is removed from the assimilation box, so that the light illumination of the plants in the assimilation box can be restored, and the measurement under photosynthesis can be continued.
[0038] The utility model has a simple structure and is easy to use, and can conveniently and quickly establish a sealed and dark environment for the assimilation box device for measuring the net primary productivity of plants, and can effectively prevent the utility model from falling off, thereby ensuring stability and reliability during use.
Claims
1. A light shield device for establishing a dark environment for determining plant net primary productivity, characterized in that: It includes an operating rod, a top frame, a top cover, a guide rail and a blackout curtain; the top frame is fixed to one side of the top of the operating rod, the top cover is made of opaque material and is arranged on the top frame, a circle of guide rails is arranged on the top frame, the blackout curtain is made of opaque material, and a plurality of hooks are arranged on the upper part of the blackout curtain, the hooks are connected to the guide rails through a sliding mechanism, and the blackout curtain can be pulled to close into a cylindrical shape or folded together.
2. The light shield device for establishing a dark environment for determining net primary productivity of plants according to claim 1, characterized in that: The top frame includes an upper ring and a lower ring with the same diameter and coaxially arranged, a plurality of vertical connecting rods are arranged between the upper ring and the lower ring, the operating rod is located on one side of the upper ring and the lower ring, and the operating rod is fixedly connected to the upper ring and the lower ring.
3. The light shield device for establishing a dark environment for determining the net primary productivity of plants according to claim 2, characterized in that: The upper end of the operating rod exceeds the upper ring, and an oblique support rod is connected to the operating rod. The oblique support rod is connected to a side of the upper ring away from the operating rod.
4. The light shield device for establishing a dark environment for determining the net primary productivity of plants according to claim 2, characterized in that: The guide rail is fixedly connected to the lower ring.
5. The light shield device for establishing a dark environment for determining net primary productivity of plants according to claim 1, characterized in that: Fixing members for connecting and fixing the two vertical side edges are arranged on the two vertical side edges of the blackout curtain.
6. The light shield device for establishing a dark environment for determining net primary productivity of plants according to claim 5, characterized in that: The fixing piece is a Velcro, a snap button or a magnetic button.
7. The light shield device for establishing a dark environment for determining net primary productivity of plants according to claim 1, characterized in that: Slide grooves are respectively arranged on both sides of the guide rail, and the sliding mechanism comprises a sliding frame, which is an inverted U-shaped structure. Two rollers are arranged on the sliding frame, and the rollers are located in the slide grooves. The hook is connected to the sliding frame.
8. The light shield device for establishing a dark environment for determining net primary productivity of plants according to claim 1, characterized in that: The cross section of the guide rail is an I-shaped or inverted T-shaped structure.