Device for synchronously monitoring CO2 concentration of atmosphere, soil and soil water in real time

Abstract

The utility model discloses a device for synchronously monitoring CO2 concentration of atmosphere, soil and soil water in real time. The device comprises a solar power supply device, an equipment box, an atmosphere index monitoring group, a soil three-parameter integrated probe, a soil CO2 monitoring group, a water collecting disc, a soil water CO2 monitoring group, a water taking tank and a mounting bracket. The soil CO2 monitoring group is composed of a soil CO2 monitoring probe and a waterproof breathable shell; the water collecting tray is composed of a filter cloth layer, a soil supporting frame, a water collecting tray body and a water collecting pipe. The soil water CO2 monitoring group consists of a soil water CO2 monitoring probe and a water storage tank; the water taking tank is composed of a tank body, a water taking pipe, a breather pipe and a water taking tank end cover. According to the device, the soil water collecting tray, the soil water CO2 monitoring group and the water taking tank are integrated, and online monitoring of the CO2 concentration of the soil water is achieved for the first time; meanwhile, monitoring of indexes such as rainfall, air temperature, air humidity, soil temperature, conductivity, volumetric water content, soil CO2 concentration and soil water CO2 concentration is integrated for the first time.

Description

Technical Field

[0001] The utility model belongs to the fields of dynamic changes of karst carbon cycle and karst carbon sink measurement monitoring, and specifically relates to a device for real-time synchronous monitoring of CO2 concentrations in the atmosphere, soil and soil water. Background Art

[0002] Water and CO2 are the driving forces of carbonate weathering, and 90% of carbonate weathering occurs at the interface between soil and rock. The CO2 concentration in soil water is one of the driving forces of carbonate weathering under the soil, directly affecting the rate of carbonate weathering, and is also a key indicator for calculating karst carbon sinks. At the same time, the CO2 concentration in soil water is affected by indicators such as the atmosphere and the physical and chemical properties of the soil. In order to explore the relationship between the CO2 concentration in soil water and rainfall, soil parameters and carbonate weathering, and accurately calculate the karst carbon sink, it is urgent to establish an integrated device for real-time monitoring of multiple soil parameters and soil water CO2 concentration.

[0003] At present, the CO2 concentration in water is calculated using the pH, temperature and main anions and cations in the water, and there is a certain error between the actual value and the actual value. There are methods for monitoring soil CO2, but the CO2 concentration in soil water (liquid state) is not equal to the soil CO2 concentration (gaseous state). Only CO2 dissolved in water can dissolve carbonate rocks, that is, CO2 in soil water. At present, there is no device that can directly measure the CO2 concentration in soil water. Therefore, the integrated device for real-time monitoring of soil multi-parameters and soil water CO2 concentration can study the dynamic changes of soil water CO2 concentration and its influencing factors, and provide support for the dynamic changes of karst carbon cycle and karst carbon sink measurement monitoring. Summary of the invention

[0004] The purpose of the utility model is to address the deficiencies of the prior art and provide a device for real-time synchronous monitoring of the CO2 concentration of the atmosphere, soil and soil water, which can achieve high-resolution real-time monitoring of rainfall, air temperature, air humidity, soil temperature, conductivity, volumetric water content, CO2 concentration and soil water CO2 under field conditions.

[0005] The utility model provides a device for real-time synchronous monitoring of the CO2 concentration of the atmosphere, soil and soil water, comprising a solar power supply device, an equipment box, an atmospheric index monitoring group, a soil three-parameter integrated probe, a soil CO2 monitoring group, a water collection tray, a soil water CO2 monitoring group, a water collection tank and a mounting bracket.

[0006] The solar power supply device comprises a solar panel, a solar controller and a battery. The solar power supply device outputs a photovoltaic DC power supply outputting a 12V current to supply a stable power supply to all devices.

[0007] The equipment box includes a box body, a data collector arranged in the box, and a gateway (or a wireless terminal device DTU) for transmitting the collected data to a cloud server in a timely manner.

[0008] The atmospheric index monitoring group includes a rain gauge (rainfall sensor), an atmospheric temperature and humidity sensor;

[0009] The soil three-parameter integrated probe is an integration of three indicator measuring probes: soil temperature, volumetric water content and conductivity;

[0010] The soil CO2 monitoring group is composed of a soil CO2 monitoring probe and a waterproof breathable shell, and the shell is composed of an acrylic tube, a waterproof breathable membrane seat, a waterproof breathable membrane, a waterproof threading head seat and a waterproof threading head; the waterproof breathable membrane seat and the waterproof threading head seat are respectively located at both ends of the acrylic tube, and the waterproof breathable membrane covers the waterproof breathable membrane seat to close the connection between the acrylic tube and the outside world; the carbon dioxide monitoring probe is installed on the waterproof threading head seat through the waterproof threading head, and the probe body is placed in the acrylic tube and suspended in the air; the waterproof breathable membrane only allows gas to pass through into the acrylic tube.

[0011] The water collecting tray is composed of a filter cloth layer, a soil support frame, a water collecting tray body and a water collecting pipe; the filter cloth layer is covered on the soil support frame, and the soil support frame is composed of a support surface with a plurality of through holes and a plurality of support feet located under the support surface and connected to the support surface, the shape of the support surface matches the size of the water collecting tray body, and the support feet stand in the water collecting tray body, the soil support frame and the filter cloth layer separate the soil from the water and allow the water to penetrate into the water collecting tray, and the water collecting pipe is located under the water collecting tray and connected to the water collecting tray.

[0012] The soil water CO2 monitoring group is composed of a soil water CO2 monitoring probe and a water storage tank; the water storage tank is composed of an end cover, a tank body and a waterproof threading head; the end cover is connected to the top opening of the tank body, the soil water CO2 monitoring probe is installed on the end cover through the waterproof threading head, and is placed inside the tank body and immersed in water; a water outlet is arranged on the upper part of the tank body to communicate with the water inlet of the water intake tank, and a water inlet is arranged on the lower part to communicate with the water collecting pipe of the water collecting tray;

[0013] The water intake tank is composed of a tank body, a water intake pipe, a vent pipe and an end cover of the water intake tank; one end of the water intake pipe is inserted into the bottom of the tank body and fixed to the end cover to ensure that all water samples can be absorbed, and the other end is exposed to the ground; the vent pipe is inserted into the top of the tank body and fixed to the end cover to ensure that the outside air enters and adjusts the air pressure of the tank body to facilitate water intake; a water inlet is arranged on the upper part of the tank body and is connected to the water outlet of the water storage tank;

[0014] The temperature and humidity sensor, soil CO2 monitoring probe, soil water CO2 monitoring probe and soil three-parameter integrated probe are connected to the data collector in the equipment box through communication lines; the solar power supply device is connected to the data collector.

[0015] Furthermore, the waterproof breathable membrane seat and the waterproof threading head seat are both threadedly connected to the acrylic tube, and a sealing ring is provided at the connection; the waterproof threading head is threadedly connected to the waterproof threading head seat, and a sealing ring is provided at the connection; the sealing design ensures that when the precipitation is large and water accumulates in the soil, only the CO2 concentration passes through the waterproof breathable membrane, blocking soil water from entering the CO2 probe, thereby extending the life of the carbon dioxide monitoring probe and ensuring the accuracy and stability of the data.

[0016] Preferably, the waterproof threading head is preferably a gland seat, and the waterproof threading head is preferably a gland. The CO2 monitoring probe line passing through it is tightened and sealed by the gland. Further, the waterproof threading head is connected to the end cover of the water storage tank by threads, and the end cover of the water storage tank is connected to the tank body opening by threads, and a sealing ring is provided at the connection.

[0017] Furthermore, the water intake pipe and the ventilation pipe are hard plastic pipes with pressure resistance to prevent the soil from squeezing and causing the two to be blocked. After rainfall, the water sample in the water intake tank can be extracted from the water intake tank by a syringe to measure the required anions, cations, heavy metals or isotope indicators.

[0018] Furthermore, the mounting bracket comprises a vertical pole and a base, the pole body is divided into sections, and the sections are connected by threads; the base is provided with a fixed steel bar, and the steel bar is inserted into the soil to firmly fix the base.

[0019] Furthermore, the solar power supply device and the atmospheric index monitoring probe are installed on a mounting bracket, and the mounting bracket is fixed to the ground; the soil CO2 monitoring probe group, the soil water CO2 monitoring probe group, the soil three-parameter integrated probe, the water collection tank, and the water collection tray are all installed in the soil.

[0020] Furthermore, the equipment box shell is a PP alloy box with waterproof and moisture-proof functions.

[0021] Furthermore, the data collector is used to collect data from each probe, and is preferably a data collector with three signal collection functions: pulse, voltage and current.

[0022] Furthermore, the soil water CO2 monitoring probe is equipped with a waterproof and breathable shell, and the waterproof and breathable shell allows gas (including CO2) in the water body to enter.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] 1. The device described in the utility model can be powered by solar energy under field conditions to monitor rainfall, air temperature, air humidity, soil temperature, conductivity, volumetric water content, soil CO2 concentration, soil water CO2 concentration and other indicators in real time and with high resolution, which is helpful to study the relationship between CO2 concentration in soil water and rainfall, soil parameters and carbonate rock weathering, and accurately calculate karst carbon sink.

[0025] 2. The device described in the utility model integrates a soil water accumulation tray, a soil water CO2 monitoring group and a water collection tank, realizing for the first time the online monitoring of soil water CO2 concentration, and can directly measure the CO2 concentration dissolved in soil water in real time and accurately, while having both measurement and sampling functions.

[0026] 3. The utility model transmits the collected data to the cloud server in a timely manner through the gateway, and the monitoring data can be viewed and downloaded anytime and anywhere. At the same time, faults can be judged immediately to ensure the accuracy and continuity of the data.

[0027] 4. The utility model can integrate multiple sets of devices to monitor soil temperature, conductivity, volumetric water content, soil CO2 concentration and other indicators at different soil layers, and can also expand other types of probes. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of the device described in Example 1;

[0029] Figure 2 This is a schematic diagram of the equipment box;

[0030] Figure 3 This is a schematic diagram of the soil CO2 monitoring group structure;

[0031] Figure 4 and schematic diagrams of the exterior (a) and cross-section (b) of the water intake tank;

[0032] Figure 5 This is a schematic diagram of the cross-sectional structure of the soil water CO2 monitoring group;

[0033] Figure 6 Schematic diagram of the water collection tray structure (a is the water collection tray, b is the water collection tray and the soil support frame;

[0034] Figure 7 This is a graph showing the monitoring results of soil multiple parameters and soil water CO2 concentration in Example 1.

[0035] The numbers in the figure are:

[0036] 1-Solar power supply device, 2-Temperature and humidity sensor, 3-Equipment box, 33-PP alloy box, 31-Data collector, 32-Gateway (DTU), 4-Soil three-parameter integrated probe, 5-Soil CO2 monitoring group, 51-Acrylic tube, 52-Waterproof breathable membrane seat, 53-Waterproof breathable membrane, 54-Soil carbon dioxide monitoring probe, 55-Waterproof threading head seat (Gland head seat), 56-Waterproof threading head (Gland head), 6- Water intake tank, 61-water inlet pipe, 62-water intake pipe, 63-ventilation pipe, 64-water intake tank end cover, 7-soil water CO2 monitoring group, 71-water storage tank end cover, 72-water storage tank, 73-soil water carbon dioxide monitoring probe, 74-water storage tank waterproof threading head (gland head), 75-water inlet, 76-water outlet, 8-water collection tray, 81-filter cloth layer, 82-soil support frame, 83-water collection tray body, 84-water collection pipe, 9-rain gauge. DETAILED DESCRIPTION

[0037] The utility model is further described by the following examples. It is necessary to point out that the following examples are only used to further illustrate the utility model and cannot be understood as limiting the protection scope of the utility model. The technical personnel in the relevant field make some non-essential improvements and adjustments to the utility model according to the above invention content and implement them specifically, which still falls within the scope of invention protection.

[0038] Example 1

[0039] The device for real-time synchronous monitoring of CO2 concentration in the atmosphere, soil and soil water described in this embodiment has the following structure:

[0040] The utility model provides an integrated real-time monitoring device for soil multi-parameters and soil water CO2 concentration, comprising a solar power supply device 1, an equipment box 3, an atmospheric index monitoring group, a soil three-parameter integrated probe 4, a soil CO2 monitoring group, a water collection tray 8, a soil water CO2 monitoring group, a water collection tank 6 and a mounting bracket.

[0041] The solar power supply device includes a solar panel, a solar controller and a battery. The solar power supply device outputs a photovoltaic DC power supply outputting a 12V current to supply a stable power supply to all devices. The equipment box includes a box body, a data collector 31 arranged in the box and a gateway 32 for transmitting the collected data to a cloud server in a timely manner. The outer shell of the equipment box is a pp alloy box 33, which has waterproof and moisture-proof functions. The data collector is used to collect data from each probe, and preferably has three signal collection functions of pulse, voltage and current.

[0042] The atmospheric index monitoring group includes a rain gauge 9, an atmospheric temperature and humidity sensor 2; the soil three-parameter integrated probe 4 is an integration of three index measuring probes of soil temperature, volumetric water content and conductivity.

[0043] The soil CO2 monitoring group 5 is composed of a soil CO2 monitoring probe 54 and a waterproof breathable shell, and the shell is composed of an acrylic tube 51, a waterproof breathable membrane seat 52, a waterproof breathable membrane 53, a gland seat 55 and a gland 56; the waterproof breathable membrane seat and the gland seat are respectively located at both ends of the acrylic tube, and the waterproof breathable membrane covers the waterproof breathable membrane seat to close the connection between the acrylic tube and the outside world; the carbon dioxide monitoring probe is installed on the gland seat through the gland, and the probe body is placed inside the acrylic tube and suspended in the air; the waterproof breathable membrane only allows gas to pass through and enter the acrylic tube. The waterproof breathable membrane seat and the gland seat are both threadedly connected to the acrylic tube, and a sealing ring is provided at the connection; the gland is threadedly connected to the gland seat, and a sealing ring is provided at the connection. The sealing design allows only the CO2 concentration to pass through the waterproof breathable membrane when the precipitation is large and causes water to accumulate in the soil, blocking soil water from entering the CO2 probe, thereby extending the life of the carbon dioxide monitoring probe and ensuring the accuracy and stability of the data.

[0044] The water collecting tray is composed of a filter cloth layer 81, a soil support frame 82, a water collecting tray body 83 and a water collecting pipe 84; the filter cloth 81 layer is covered on the soil support frame, and the soil support frame 82 is composed of a support surface with a plurality of through holes and a plurality of support feet located under the support surface and connected to the support surface, the shape of the support surface matches the size of the water collecting tray body 83, and the support feet stand in the water collecting tray body, the soil support frame and the filter cloth layer separate the soil from the water and allow the water to penetrate into the water collecting tray, and the water collecting pipe is located under the water collecting tray and connected to the water collecting tray.

[0045] The soil water CO2 monitoring group 7 is composed of a soil water CO2 monitoring probe 73 and a water storage tank 72; the water storage tank is composed of an end cover 71, a tank body and a gland 74; the end cover 71 is connected to the top opening of the tank body, and the soil water CO2 monitoring probe is installed on the end cover through the gland and is placed inside the tank body and immersed in water; a water outlet 76 is arranged on the upper part of the tank body to communicate with the water inlet 75 of the water intake tank, and a water inlet is arranged on the lower part to communicate with the water collecting pipe of the water collecting tray; the gland is connected to the end cover of the water storage tank by a thread, and the end cover of the water storage tank is connected to the tank body opening by a thread, and a sealing ring is arranged at the connection.

[0046] The water intake tank 6 is composed of a tank body, a water intake pipe 62, a vent pipe 63 and a water intake tank end cap 64; one end of the water intake pipe is inserted into the bottom of the tank body and fixed to the end cap to ensure that all water samples can be absorbed, and the other end is exposed to the ground; the vent pipe is inserted into the top of the tank body and fixed to the end cap to ensure that the outside air enters and adjusts the air pressure of the tank body to facilitate water intake; the upper part of the tank body is provided with a water inlet connected to the water outlet of the water storage tank; the water intake pipe and the vent pipe are hard plastic pipes with pressure resistance to prevent the soil from squeezing and causing the two to be blocked. After rainfall, the water sample in the water intake tank can be extracted by a syringe to measure the required anions, cations, heavy metals or isotope indicators.

[0047] The atmospheric temperature and humidity sensor 2, soil CO2 monitoring probe 54, soil water CO2 monitoring probe 73 and soil three-parameter integrated probe 4 are connected to the data collector 31 in the equipment box 3 through a communication line; the solar power supply device is connected to the data collector. The mounting bracket includes a vertical pole and a base, the pole body is divided into sections, and the sections are connected by threads; the base is equipped with a fixed steel bar, and the steel bar is inserted into the soil to fix the base firmly. The solar power supply device and the atmospheric index monitoring probe are installed on the mounting bracket, and the mounting bracket is fixed to the ground; the soil CO2 monitoring probe group, the soil water CO2 monitoring probe group, the soil three-parameter integrated probe, the water collection tank, and the water collection tray are all installed in the soil layer. The solar power supply device, the equipment box, the data collector, the DTU, the atmospheric index monitoring group, the soil three-parameter integrated probe, and the carbon dioxide monitoring probe can all be purchased and installed on the market. The solar power supply device can work in the range of -40℃~60℃, and the power supply is 12V 30AH to ensure the stable operation of the equipment under various extreme temperatures. DTU reads the data in the data collector in a polling manner through the 485 bus to ensure the orderly and stable data transmission process. The rain gauge in the atmospheric index monitoring group uses 485 digital output with a resolution of 0.2mm; the atmospheric temperature and humidity sensor uses 0~5V analog output, with a temperature resolution of 0.1℃ and a humidity resolution of 0.1%; the soil three-parameter integrated probe uses SDI12 digital output sensor, and the resolutions of soil temperature, volumetric water content and conductivity are 0.1℃, 0.001m respectively. 3 / m 3 and 0.1μS / cm. The CO2 monitoring probe uses 0-5V analog output with a resolution of 1ppm. The data collector contains one 485 communication terminal each for communicating with the upper and lower computers, four terminals for collecting 0-5V analog signals, and one terminal for collecting SDI12 digital signals. Among them, the rainfall sensor in the atmospheric index monitoring group is connected to the data collector through the 485 digital communication terminal as the lower computer, the temperature and humidity sensor in the atmospheric index monitoring group connects the temperature and humidity signals to the data collector through two 0-5V analog terminals, the soil carbon dioxide monitoring probe and the soil water carbon dioxide monitoring probe connect the signals to the data collector through two 0-5V analog terminals, and the soil three-parameter integrated probe connects the signals to the data collector through the SDI12 digital terminal. DTU is connected to the data collector through the 485 communication terminal as the upper computer.

[0048] The installation and monitoring methods are as follows:

[0049] (1) At the selected field site, according to the monitoring depth requirements, dig a working pit with a length and width of 1m×1m from the soil surface. Taking the monitoring index 30cm below the soil as an example, the depth needs to be dug to about 55cm as the installation pit for each probe, water collection tray and water collection tank.

[0050] (2) Dig a circular pit with a diameter of about 50 cm and a depth of 30 cm next to the working pit, bury the base of the mounting bracket, and install the vertical poles. The vertical poles are galvanized steel pipes with a paint finish to prevent rust.

[0051] (3) Install the solar power supply device on the top of the pole, keeping the solar panel facing south. The solar power supply device includes a solar panel, a solar controller and a battery. The photovoltaic DC power source outputs a 12V current power supply to provide a stable power supply for all devices. Select the solar output power that meets the needs according to the power consumption and recording frequency of the installed probe.

[0052] (4) Install 2-temperature and humidity sensor, 3-equipment box and 9-rain gauge on the pole in sequence. The temperature and humidity sensor should be equipped with blinds to prevent wind and rain to extend its service life. The outer shell of the equipment box 3 is a pp alloy box 33, which has waterproof and moisture-proof functions. The box is equipped with a data collector 31 and a gateway 32. The data collector 31 is responsible for collecting data from each probe, and the gateway 32 is responsible for transmitting the collected data to the cloud server in a timely manner so that it can be viewed anytime and anywhere. 9-Rain gauge is installed on the pole with a horizontal arm. The rain gauge should be installed horizontally to ensure the accuracy of rainfall measurement.

[0053] (5) Install the soil carbon dioxide monitoring group 5: Dig a vertical pit the size of an acrylic tube 51 at 30 cm from the side of the 50 cm working pit to place the carbon dioxide monitoring group 55. Insert the soil three-parameter integrated probe 4 at 30 cm.

[0054] (6) Dig a pit the size of the water collection tray horizontally on the other side of the 50 cm working pit, and insert the water collection tray 8 horizontally into the pit to ensure that the water collected is undisturbed soil leaching water. Figure 1 As shown, in order to ensure that the soil leached water enters the water storage tank 7 smoothly, the water storage tank 7 should be installed below the water collection tray 8, and the water inlet 75 of the water storage tank 7 is at the bottom, and the water outlet 76 is at the top, so as to ensure that the soil water carbon dioxide probe 73 is always immersed in the soil water. According to the results of the previous occasional measurement of soil CO2 concentration, a CO2 probe with a range of 20,000 ppm is selected. If the range is exceeded during the monitoring process, the CO2 probe range needs to be adjusted or a probe with a larger range needs to be replaced. Generally, the maximum range does not exceed 50,000 ppm.

[0055] (7) Connect 2-temperature and humidity sensor, 54 carbon dioxide monitoring probe, 73 soil water CO2 monitoring probe, 4 soil three-parameter probe and 32 gateway to data collector 31 in equipment box 3 through communication lines. Data collector 31 is connected to 1 solar power supply device to power all probes, 31 collectors and 32 gateways.

[0056] (8) After installation, backfill the working pit and the pole burying pit and compact them. Ensure that the water intake pipe 62 and the ventilation pipe 63 are exposed above the ground. The water intake pipe 62 and the ventilation pipe 63 can be covered with a breathable bottle to prevent rainwater and mud from splashing into the pipe holes and blocking them.

[0057] (9) Start all devices and probes, set the monitoring frequency, generally 15-30 minutes. The recorded data is uploaded to the cloud platform at the same time, and the data can be viewed or downloaded instantly on the computer or mobile phone. Figure 7 .

Claims

1. A device for real-time synchronous monitoring of CO2 concentrations in the atmosphere, soil and soil water, characterized in that: It includes a solar power supply device, an equipment box, an atmospheric index monitoring group, a soil three-parameter integrated probe, a soil CO2 monitoring group, a water collection tray, a soil water CO2 monitoring group, a water collection tank and a mounting bracket; The solar power supply device comprises a solar panel, a solar controller and a battery; The equipment box includes a box body, a data collector arranged in the box, and a gateway for transmitting the collected data to a cloud server in a timely manner; The atmospheric index monitoring group includes a rain gauge and an atmospheric temperature and humidity sensor; The soil three-parameter integrated probe is an integration of three indicator measuring probes: soil temperature, volumetric water content and conductivity; The soil CO2 monitoring group is composed of a soil CO2 monitoring probe and a waterproof breathable shell, and the shell is composed of an acrylic tube, a waterproof breathable membrane seat, a waterproof breathable membrane, a waterproof threading head seat and a waterproof threading head; the waterproof breathable membrane seat and the waterproof threading head seat are respectively located at both ends of the acrylic tube, and the waterproof breathable membrane covers the waterproof breathable membrane seat to close the connection between the acrylic tube and the outside world; the carbon dioxide monitoring probe is installed on the waterproof threading head seat through the waterproof threading head, and the probe body is placed inside the acrylic tube and suspended in the air; the waterproof breathable membrane only allows gas to penetrate into the acrylic tube; The water collecting pan is composed of a filter cloth layer, a soil support frame, a water collecting pan body and a water collecting pipe; the filter cloth layer covers the soil support frame, the soil support frame is composed of a support surface with a plurality of through holes and a plurality of support feet located below the support surface and connected to the support surface, the shape of the support surface matches the size of the water collecting pan body, the support feet stand in the water collecting pan body, the soil support frame and the filter cloth layer separate the soil from the water and allow the water to infiltrate into the water collecting pan, and the water collecting pipe is located below the water collecting pan and communicates with the water collecting pan; The soil water CO2 monitoring group is composed of a soil water CO2 monitoring probe and a water storage tank; the water storage tank is composed of an end cover, a tank body and a waterproof threading head; the end cover is connected to the top opening of the tank body, the soil water CO2 monitoring probe is installed on the end cover through the waterproof threading head, and is placed inside the tank body and immersed in water; a water outlet is arranged on the upper part of the tank body to communicate with the water inlet of the water intake tank, and a water inlet is arranged on the lower part to communicate with the water collecting pipe of the water collecting tray; The water intake tank is composed of a tank body, a water intake pipe, a vent pipe and an end cover of the water intake tank; one end of the water intake pipe is inserted into the bottom of the tank body and fixed to the end cover to ensure that all water samples can be absorbed, and the other end is exposed to the ground; the vent pipe is inserted into the top of the tank body and fixed to the end cover to ensure that the outside air enters and adjusts the air pressure of the tank body to facilitate water intake; a water inlet is arranged on the upper part of the tank body and is connected to the water outlet of the water storage tank; The temperature and humidity sensor, soil CO2 monitoring probe, soil water CO2 monitoring probe and soil three-parameter integrated probe are connected to the data collector in the equipment box through communication lines; the solar power supply device is connected to the data collector.

2. The device for real-time synchronous monitoring of CO2 concentration in the atmosphere, soil and soil water according to claim 1, characterized in that: The waterproof breathable membrane seat and the waterproof threading head seat are both threadedly connected to the acrylic pipe, and a sealing ring is provided at the connection; the waterproof threading head is threadedly connected to the waterproof threading head seat, and a sealing ring is provided at the connection.

3. The device for real-time synchronous monitoring of CO2 concentration in the atmosphere, soil and soil water according to claim 1, characterized in that: The waterproof threading head is connected to the end cover of the water storage tank through threads, the end cover of the water storage tank is connected to the opening of the tank body through threads, and sealing rings are arranged at the connection points.

4. The device for real-time synchronous monitoring of CO2 concentrations in the atmosphere, soil and soil water according to claim 1, characterized in that: The water intake pipe and the ventilation pipe are hard plastic pipes with pressure resistance to prevent the occlusion of the two due to soil squeezing.

5. The device for real-time synchronous monitoring of CO2 concentrations in the atmosphere, soil and soil water according to claim 1, characterized in that: The mounting bracket comprises a vertical pole and a base, the pole body is divided into sections, and each section is connected by threads; the base is provided with a fixing steel chisel, and the steel chisel is inserted into the soil to fix the base firmly.

6. The device for real-time synchronous monitoring of CO2 concentration in the atmosphere, soil and soil water according to claim 1, characterized in that: The solar power supply device and the atmospheric index monitoring probe are installed on a mounting bracket, and the mounting bracket is fixed to the ground; the soil CO2 monitoring probe group, the soil water CO2 monitoring probe group, the soil three-parameter integrated probe, the water collection tank, and the water collection tray are all installed in the soil.

7. The device for real-time synchronous monitoring of CO2 concentrations in the atmosphere, soil and soil water according to claim 1, characterized in that: The data collector is a data collector with three signal collection functions: pulse, voltage and current.

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