Atmospheric carbon dioxide concentration control and monitoring system for vegetation research

Abstract

The invention discloses a vegetation research-oriented atmospheric carbon dioxide concentration control and monitoring system, which relates to the technical field of ecological environment monitoring, and comprises an open-top plant growth chamber, a CO2 gas escape device for uniformly escaping gas, a CO2 sensor carrying platform with a lifting function and a CO2 gas supply unit, the CO2 gas escape device and the CO2 sensor carrying platform are both arranged in the open-top plant growth chamber, a CO2 sensor is arranged on the CO2 sensor carrying platform, and the CO2 gas escape device is communicated with the CO2 gas supply unit; a CO2 sensor carrying platform with a lifting function and a carried CO2 sensor are arranged in the open-top plant growth chamber, and along with growth of plants, the height of the CO2 sensor can be adjusted through the CO2 sensor carrying platform to correspond to the height of a plant canopy, so that uniform distribution and accurate monitoring of the CO2 concentration of the plant canopy are achieved, and the CO2 concentration of the plant canopy can be accurately monitored. And the research standardization and reliability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of ecological environment monitoring, and in particular to an atmospheric carbon dioxide concentration control and monitoring system for vegetation research. Background Art

[0002] Vegetation is an important component of terrestrial ecosystems and has extremely important functions and values. The increase in atmospheric carbon dioxide concentration is one of the main characteristics of climate change. Since the Industrial Revolution, the average atmospheric CO 2 The concentration has increased from 280ppm to the current 420ppm. 2 Research on the impact of increased concentrations on vegetation is currently at the forefront of research at home and abroad, and is also the basis for national and local governments to carry out climate change response management.

[0003] Currently, the apparatus known to the applicant for studying plant growth is a plant growth chamber and an open-top growth chamber. However, the plants in the plant growth chamber grow in a relatively small environment, and the temperature, light, humidity and CO are completely controlled manually. 2 concentration, natural plants or communities cannot be used as experimental objects, the growth environment is less realistic, and due to space limitations, it is only suitable for low plants such as vegetables. Although open-top growth chambers can use natural plants or communities as experimental objects, the CO 2 The sensor was fixed at a fixed position (such as a corner or a sensor iron frame) from the beginning of the experiment. Plants mainly use the canopy leaves as photosynthesis areas for photosynthesis. The height of the plant canopy changes dynamically during the growing season. The carbon dioxide concentration has a concentration gradient difference at the vertical height of the growth chamber. Therefore, the CO2 at a fixed position 2 The data monitored by the sensor cannot truly reflect the CO2 content in the photosynthesis area of ​​the plant. 2 concentration, which leads to low standardization and reliability of research. 2 The uniformity of concentration distribution at the same vertical height will also affect the accuracy of concentration monitoring.

[0004] Therefore, people are in urgent need of a method to realize CO 2 Evenly distributed, CO 2 The atmospheric carbon dioxide concentration control and monitoring system for vegetation research with adjustable sensor height improves research standardization and reliability. Summary of the invention

[0005] The purpose of the present invention is to provide an atmospheric carbon dioxide concentration control and monitoring system for vegetation research to solve the problems existing in the above-mentioned prior art. 2The height of the sensor enables it to adapt to plants in different growth stages, accurately detect the carbon dioxide concentration in the plant canopy, and improve the standardization and reliability of research.

[0006] To achieve the above object, the present invention provides the following scheme: The present invention provides an atmospheric carbon dioxide concentration control and monitoring system for vegetation research, including an open-top plant growth chamber, a CO 2 Gas escape device, CO with lifting function 2 Sensor platform and CO 2 Gas supply unit, the CO 2 Gas escape device and the CO 2 The sensor-carrying platforms are all arranged in the open-top plant growth chamber, and the CO 2 The sensor platform is equipped with a CO 2 Sensor, the CO 2 Gas Escape Device and the CO 2 The gas supply unit is connected.

[0007] Preferably, the open-top plant growth chamber includes a lower positioning ring, an upper positioning ring and a plurality of tempered glasses, the plurality of tempered glasses are surrounded to form a cylindrical structure, adjacent tempered glasses are sealed and connected, the bottom of the tempered glass is inserted on the lower positioning ring, and the top of the tempered glass is inserted on the upper positioning ring.

[0008] Preferably, a glass door is rotatably provided on the tempered glass, and the glass door is sealed to the tempered glass.

[0009] Preferably, the CO 2 The gas escape device is an air distribution pipe, which is arranged at the bottom of the inner cavity of the open-top plant growth chamber, and is provided with a plurality of air holes opening upward.

[0010] Preferably, the air distribution pipes are arranged in a cross shape.

[0011] Preferably, the CO 2 The gas supply unit includes a carbon dioxide cylinder, which is connected to the CO2 cylinder through an integrated pressure reducing valve, a flow meter and a gas transmission pipe. 2 The gas escape device is connected.

[0012] Preferably, the CO 2 The gas supply unit also includes a cylinder stabilizing frame, which is a cylindrical structure with an open top. An inlet and outlet for the carbon dioxide cylinder is provided on one side wall of the cylinder stabilizing frame. A blocking chain is detachably provided at the inlet and outlet to prevent the carbon dioxide cylinder from tipping over.

[0013] Preferably, the CO 2 The gas supply unit also includes a protective shed for shading from the sun and rain, and the carbon dioxide cylinder, the integrated pressure reducing valve and the flow meter are all arranged under the protective shed.

[0014] Preferably, the atmospheric carbon dioxide concentration control and monitoring system for vegetation research further includes a power supply and data acquisition unit, the power supply and data acquisition unit includes a data collector, the data collector and the CO 2 Sensor electrical connections.

[0015] Preferably, the power supply and data acquisition unit further comprises a solar panel and a battery, the solar panel is electrically connected to the battery, and the data acquisition unit is electrically connected to the CO 2 The sensors are all electrically connected to the battery.

[0016] Compared with the prior art, the present invention mainly achieves the following technical effects:

[0017] As plants grow, CO 2 Sensor-based platform regulates CO 2 The height of the sensor makes the CO 2 The sensor corresponds to the plant canopy, which makes CO 2 The sensor can adapt to plants in different growth stages and cooperate with CO 2 Gas Escape Devices provide uniform escape of gases in open-top plant growth chambers, enabling 2 Based on the uniform distribution of gas at the same vertical height, the carbon dioxide concentration in the plant canopy can be accurately detected to improve the standardization and reliability of research.

[0018] Compared with the prior art, other solutions of the present invention have achieved the following technical effects:

[0019] The setting of tempered glass reduces the blocking of sunlight. Compared with plastic film with poor light transmittance, it can ensure that the growth environment of plants is not excessively affected, thus ensuring the reliability of the research.

[0020] The air distribution pipes are arranged in a cross shape and the carbon dioxide is supplied from bottom to top, which can improve the uniformity of carbon dioxide distribution in the open-top plant growth room, thereby improving the detection accuracy.

[0021] The installation of solar panels and batteries enables the system to complete autonomous power supply, so that the system can be applied to coastal wetlands, grasslands and shrubs (including alpine grasslands and shrubs) and some farmland areas where power supply is difficult, thereby increasing the scope of application of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a structural schematic diagram of an atmospheric carbon dioxide concentration control and monitoring system for vegetation research in an embodiment of the present invention;

[0024] Figure 2 Schematic diagram of the structure of an open-top plant growth chamber in an embodiment of the present invention;

[0025] Figure 3 An exploded view of an open-top plant growth chamber according to an embodiment of the present invention;

[0026] Figure 4 CO in the embodiment of the present invention 2 A schematic diagram of the structure of the gas supply unit;

[0027] Figure 5 This is a schematic diagram of the structure of the power supply and data acquisition unit in an embodiment of the present invention;

[0028] Among them: 1. Open-top plant growth chamber; 2. CO 2 Sensor; 3. CO 2 Sensor mounting platform; 4. Lower positioning ring; 5. Upper positioning ring; 6. Tempered glass; 7. Glass door; 8. Hinge; 9. H-shaped sealing strip; 10. Punch-free glass door lock; 11. Handle; 12. Carbon dioxide cylinder; 13. Integrated pressure reducing valve; 14. Flow meter; 15. Gas transmission pipe; 16. Gas distribution pipe; 17. Cylinder stabilizing rack; 18. Blocking chain; 19. Protective shed; 20. Data collector; 21. Solar panel. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The purpose of the present invention is to provide an atmospheric carbon dioxide concentration control and monitoring system for vegetation research to solve the problems existing in the prior art. 2 The height of the sensor enables it to adapt to plants in different growth stages, accurately detect the carbon dioxide concentration in the plant canopy, and improve the standardization and reliability of research.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Please refer to Figure 1 to Figure 5 As shown, an atmospheric carbon dioxide concentration control and monitoring system for vegetation research is provided, comprising an open-top plant growth chamber 1, a CO 2 Gas escape device, CO with lifting function 2 Sensor Platform 3 and CO 2 Gas supply unit, CO 2 Sensor 2 and CO 2 Gas supply unit, the open-top plant growth chamber 1 is a chamber with an open top, and the size of the open-top plant growth chamber 1 can be determined according to the size of the plants to be studied. 2 Gas escape device and the CO 2 The sensor carrying platforms 3 are all arranged in the open-top plant growth chamber 1. 2 The sensor mounting platform 3 is provided with a CO 2 Sensor 2, the CO 2 Gas Escape Device and the CO 2 The gas supply unit is connected to the open-top plant growth chamber 1 to uniformly supply carbon dioxide to ensure that CO 2 The distribution uniformity of CO2 can be controlled while controlling the concentration of CO2 in the open-top plant growth chamber 1; as the plants grow, the CO2 2 Sensor-carrying platform 3 regulates CO 2 The height of sensor 2 makes CO 2 Sensor 2 corresponds to the plant canopy, which makes CO 2 Sensor 2 can adapt to plants in different growth stages and cooperate with CO 2 The gas escape device 3 can evenly escape gas in the open-top plant growth chamber 1, and can 2 Based on the uniform distribution of gas at the same vertical height, the carbon dioxide concentration in the plant canopy can be accurately detected to improve the standardization and reliability of research.

[0033] CO 2 The sensor carrying platform 3 can be a manual lifting structure or an automatic lifting structure. The manual lifting structure can be a vertical telescopic tube slidably arranged in another vertical fixed tube. 2 Sensor 2 is set on the telescopic tube, and the CO 2The height of the sensor 2 is determined by a pin hole on the telescopic tube, and a plurality of pin holes are set in the vertical direction of the fixed tube. The positioning is completed by sequentially passing the pin holes of the fixed tube and the telescopic tube. When the pin is located at different pin holes of the fixed tube, the extension length of the telescopic tube is different. The manual lifting structure can also be a moving ring slidably sleeved on an upright fixed rod, and a locking screw is threadedly connected to the moving ring. The locking screw is screwed through the moving ring and squeezed on the fixed rod to fix the position of the moving ring. 2 Sensor 2 is arranged on the motion ring; the automatic lifting structure can be a vertically telescopic electric / pneumatic / hydraulic telescope, CO 2 Sensor 2 is set on the telescopic end of the telescope; whether it is a manual lifting structure or an automatic lifting structure, it is intended to be able to 2 The sensor 2 can provide lifting motion to adjust its height, which can be selected according to actual needs.

[0034] The specific structure of the open-top plant growth chamber 1 includes a lower positioning ring 4, an upper positioning ring 5 and a plurality of tempered glasses 6, wherein the plurality of tempered glasses 6 are surrounded to form a cylindrical structure, and adjacent tempered glasses 6 are sealed and connected by silicone. Specifically, the sealing connection is completed by silicone caulking between the tempered glasses 6, and in other embodiments, the sealing connection can also be completed by other sealants; the bottom of the tempered glass 6 is inserted on the lower positioning ring 4, and the top of the tempered glass 6 is inserted on the upper positioning ring 5. Specifically, the upper positioning ring 5 and the lower positioning ring 4 are both provided with a groove body matching the tempered glass 6 for the tempered glass 6 to be inserted and fixed. The installation and disassembly convenience of the open-top plant growth chamber 1 can be improved by the insertion method, and its production cost can be reduced. At the same time, the setting of the tempered glass 6 reduces the blocking of sunlight. Compared with plastic films with poor light transmittance, it can ensure that the growth environment of plants such as total radiation, photosynthetically active radiation and humidity are less affected. The completely open-top design is to be not or less affected by the increase in temperature, thereby ensuring the reliability of the research.

[0035] The material of the upper positioning ring 5 and the lower positioning ring 4 is stainless steel to increase their service life.

[0036] In this embodiment, four pieces of tempered glass 6 are arranged to form a square tube structure. The lower positioning ring 4 and the upper positioning ring 5 are both square rings. The inner edge of the upper positioning ring 5 is arranged close to the tempered glass 6 to increase the opening size, so that the open-top plant growth chamber 1 has a larger area to exchange temperature and humidity with the external environment, thereby ensuring the consistency between the environment in the open-top plant growth chamber 1 and the external environment.

[0037] In order to facilitate the entry and exit of the staff, a glass door 7 is rotatably arranged on the tempered glass 6 through a hinge 8. The glass door 7 and the tempered glass 6 are sealed to prevent the supplied carbon dioxide from leaking out. The sealing method is: an H-shaped sealing strip 9 is arranged at the edge of the glass door 7 away from the hinge 8, and sealing strips are arranged on other edges.

[0038] The glass door 7 and the tempered glass 6 are locked by a punch-free glass door lock 10 .

[0039] A handle 11 is installed on the glass door 7 to facilitate opening or closing the glass door 7.

[0040] In this embodiment, CO 2 The gas escape device is an air distribution pipe 16, which is arranged at the bottom of the inner cavity of the open-top plant growth chamber 1. The air distribution pipe 16 is provided with a plurality of air holes opening upward to improve the uniformity of carbon dioxide supply, wherein the plurality of air holes are evenly arranged, and the air distribution pipe 16 can be made of a PVC pipe.

[0041] In this embodiment, the gas distribution pipes 16 are arranged in a cross shape, which realizes the CO 2 The pressure of the gas at each location in the gas distribution pipe 16 is the same, and the equidistant openings on the pipe further improve the uniformity of the carbon dioxide supply, and the uniformity of the carbon dioxide distribution in the open-top plant growth chamber 1, thereby improving the detection accuracy.

[0042] CO 2 The gas supply unit includes a carbon dioxide cylinder 12 for storing carbon dioxide, and the carbon dioxide cylinder 12 is connected to the CO2 via an integrated pressure reducing valve 13, a flow meter 14 and a gas transmission pipe 15. 2 The gas escape device is connected, and the material of the gas transmission pipe 15 is PVC. In this embodiment, the integrated pressure reducing valve 13 is a pressure reducing valve with two pressure gauges. The control of the carbon dioxide concentration in the open-top plant growth chamber 1 can be achieved through the valve on the carbon dioxide cylinder 12, the integrated pressure reducing valve 13 and the flow meter 14.

[0043] CO 2 The gas supply unit also includes a cylinder stabilizing rack 17, which is a cylindrical structure with an open top. An inlet and outlet for the carbon dioxide cylinder 12 is provided on one side wall of the cylinder stabilizing rack 17. A blocking chain 18 is detachably provided at the inlet and outlet. After the carbon dioxide cylinder 12 is placed into the cylinder stabilizing rack 17 from the inlet and outlet, the blocking chain 18 is installed. The blocking chain 18 cooperates with the cylinder stabilizing rack 17 to stabilize and straighten the carbon dioxide cylinder 12 to prevent the carbon dioxide cylinder 12 from tipping over.

[0044] The blocking chain 18 can be made of cloth strips or steel chains, etc., as long as it can form a barrier. One end of the blocking chain 18 is fixed to the cylinder stabilizing frame 17, and the other end is detachably set on the cylinder stabilizing frame 17 by hooking or binding.

[0045] CO 2 The gas supply unit also includes a protective shed 19. The carbon dioxide cylinder 12, the integrated pressure reducing valve 13 and the flow meter 14 are all arranged under the protective shed 19. The protective shed 19 can provide shade and rain protection for the structure below.

[0046] The system also includes a power supply and data acquisition unit, which includes a data acquisition device 20. The data acquisition device 20 and the CO 2 The sensor 2 is electrically connected and used for data collection and storage.

[0047] The power supply and data acquisition unit also includes a solar panel 21 and a battery. The solar panel 21 is electrically connected to the battery. The data acquisition unit 20 is electrically connected to the CO 2 The sensors 2 are all electrically connected to the battery. The arrangement of the solar panels 21 and the battery enables the system to be autonomously powered, so that the system can be applied to coastal wetlands, grasslands and shrubs (including alpine grasslands and shrubs) and some farmland areas where power supply is difficult, thereby improving the scope of application of the system.

[0048] In actual use, an open-top plant growth chamber 1 is arranged around the plants in the natural environment to be studied, and a CO 2 Sensor 2, CO 2 Sensor platform 3, CO 2 Gas escape device, CO 2 The gas supply unit, power supply and data acquisition unit can be used to control the carbon dioxide concentration in the open-top plant growth chamber 1 to study the effect of increased carbon dioxide concentration on plants. At the same time, an atmospheric carbon dioxide concentration control and monitoring system for vegetation research can be additionally established. In this system, there is no need to regulate CO 2 concentration, as a control group.

[0049] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0050] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0051] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An atmospheric carbon dioxide concentration control and monitoring system for vegetation research, characterized in that: It includes an open-top plant growth chamber, a CO2 gas escape device for uniformly dissipating gas, a CO2 sensor carrying platform with a lifting function, and a CO2 gas supply unit. The CO2 gas escape device and the CO2 sensor carrying platform are both arranged in the open-top plant growth chamber, a CO2 sensor is arranged on the CO2 sensor carrying platform, and the CO2 gas escape device is connected to the CO2 gas supply unit.

2. The atmospheric carbon dioxide concentration control and monitoring system for vegetation research according to claim 1 is characterized in that: The open-top plant growth chamber comprises a lower positioning ring, an upper positioning ring and a plurality of tempered glasses, wherein the plurality of tempered glasses are surrounded to form a cylindrical structure, and adjacent tempered glasses are sealed and connected, the bottom of the tempered glass is inserted on the lower positioning ring, and the top of the tempered glass is inserted on the upper positioning ring.

3. The atmospheric carbon dioxide concentration control and monitoring system for vegetation research according to claim 2 is characterized in that: A glass door is rotatably arranged on the tempered glass, and the glass door is sealed with the tempered glass.

4. The atmospheric carbon dioxide concentration control and monitoring system for vegetation research according to claim 1 is characterized in that: The CO2 gas escape device is an air distribution pipe, which is arranged at the bottom of the inner cavity of the open-top plant growth chamber. The air distribution pipe is provided with a plurality of air holes opening upward.

5. The atmospheric carbon dioxide concentration control and monitoring system for vegetation research according to claim 4 is characterized in that: The air distribution pipes are arranged in a cross shape.

6. The atmospheric carbon dioxide concentration control and monitoring system for vegetation research according to claim 1 is characterized in that: The CO2 gas supply unit comprises a carbon dioxide cylinder, which is connected to the CO2 gas escape device via an integrated pressure reducing valve, a flow meter and a gas transmission pipe in sequence.

7. The atmospheric carbon dioxide concentration control and monitoring system for vegetation research according to claim 6 is characterized in that: The CO2 gas supply unit also includes a cylinder stabilizing frame, which is a cylindrical structure with an open top. An inlet and outlet for the carbon dioxide cylinder is provided on one side wall of the cylinder stabilizing frame. A blocking chain is detachably provided at the inlet and outlet to prevent the carbon dioxide cylinder from tipping over.

8. The atmospheric carbon dioxide concentration control and monitoring system for vegetation research according to claim 6 is characterized in that: The CO2 gas supply unit also includes a protective shed for shading and protecting from the sun and rain, and the carbon dioxide cylinder, the integrated pressure reducing valve and the flow meter are all arranged under the protective shed.

9. The atmospheric carbon dioxide concentration control and monitoring system for vegetation research according to claim 1, characterized in that: The atmospheric carbon dioxide concentration control and monitoring system for vegetation research also includes a power supply and data acquisition unit, which includes a data collector, and the data collector is electrically connected to the CO2 sensor.

10. The atmospheric carbon dioxide concentration control and monitoring system for vegetation research according to claim 9, characterized in that: The power supply and data acquisition unit also includes a solar panel and a battery. The solar panel is electrically connected to the battery. The data acquisition unit and the CO2 sensor are both electrically connected to the battery.

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