Water-gas interface carbon dioxide flux monitoring buoy

Abstract

The invention provides a water-gas interface carbon dioxide flux monitoring buoy, and relates to the field of carbon dioxide flux monitoring. The buoy comprises a buoy body, a gas-liquid separation module and a gas detection module, wherein the buoy body is provided with a first gas inlet, a first gas outlet, a first gas inlet channel, a first gas outlet channel, a second gas inlet channel and a second gas outlet channel; the gas-liquid separation module is arranged at the bottom of the buoy body and is provided with a second gas inlet and a second gas outlet; the first air inlet is communicated with the first air inlet channel, the first air outlet is communicated with the first air outlet channel, the second air inlet is communicated with the second air inlet channel, and the second air outlet is communicated with the second air outlet channel. The gas detection module communicates with the first gas inlet channel and the first gas outlet channel or communicates with the second gas inlet channel and the second gas outlet channel. According to the buoy provided by the invention, the carbon dioxide concentration detection of the atmosphere and the water body shares the same gas detection module, so that the monitoring accuracy is higher, the structure is more compact, and the energy consumption is lower.

Description

Technical Field

[0001] The present application relates to the technical field of carbon dioxide flux monitoring, and in particular to a carbon dioxide flux monitoring buoy at a water-air interface. Background Art

[0002] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present disclosure, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art.

[0003] Monitoring carbon dioxide flux at the water-air interface can reflect the exchange amount of carbon dioxide, the most important greenhouse gas, between water bodies and the atmosphere, thereby further determining the source and sink conversion process of carbon dioxide. Therefore, it is an important environmental monitoring task. At present, there are three main methods for monitoring carbon dioxide flux at the water-air interface: measurement observation, remote sensing observation and numerical simulation. Among them, measurement observation is to obtain specific flux values ​​directly through field testing, and the results are the most accurate. For measurement observation, there are two main methods: partial pressure difference method and vorticity method. Among them, the partial pressure difference method is suitable for in-situ monitoring of water bodies, while the vorticity method is suitable for land-based monitoring. The partial pressure difference method is based on the liquid film diffusion theory of interfacial mass transfer. The concentration of gaseous carbon dioxide in the atmosphere and water bodies can be detected and further calculated to obtain the partial pressure of carbon dioxide. Combined with the carbon dioxide gas solubility coefficient, water-air interface gas exchange rate and other related coefficients, the final water-air interface carbon dioxide exchange flux is calculated. The basic calculation formula is: F CO2 = k × K H CO2 ×ΔpCO2. Where: F CO2 is the exchange flux of carbon dioxide at the water-air interface, in mmol / (m 2 *d); k is the gas exchange rate at the water-gas interface, that is, the rate at which gas passes through the water-gas interface in molecular form, in cm / h; K H CO2 is the solubility coefficient of carbon dioxide, that is, the number of moles of carbon dioxide that can be dissolved in every kilogram of water under certain pressure conditions, with the unit of mol / (Kg*atm); ΔpCO2 is the partial pressure difference of carbon dioxide in water vapor, with the unit of Pa.

[0004] In the existing water-gas interface carbon dioxide flux monitoring device, the detection of carbon dioxide concentrations in the atmosphere and water bodies requires separate gas detection modules, that is, two gas detection modules are required to detect the concentration of carbon dioxide in the atmosphere and the concentration of carbon dioxide in the water body respectively. This increases the system error and poor data consistency, thereby reducing the accuracy of flux monitoring. Summary of the invention

[0005] In view of this, the purpose of the present application is to provide a water-air interface carbon dioxide flux monitoring buoy, aiming to solve the technical problem of low accuracy of water-air interface carbon dioxide flux monitoring in the prior art.

[0006] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0007] The embodiment of the present application provides a water-air interface carbon dioxide flux monitoring buoy, comprising:

[0008] The buoy body is provided with a first air inlet and a first air outlet on the top, the buoy body defines a first air inlet channel and a first air outlet channel, the first air inlet is communicated with the first air inlet channel and is used to input gas in the atmosphere into the first air inlet channel, and the first air outlet is communicated with the first air outlet channel;

[0009] a gas-liquid separation module, arranged at the bottom of the buoy body and provided with a second air inlet and a second air outlet, the buoy body further defines a second air inlet channel and a second air outlet channel, the second air inlet is communicated with the second air inlet channel, and is used to input the gas in the water separated by the gas-liquid separation module into the second air inlet channel, and the second air outlet is communicated with the second air outlet channel;

[0010] A gas detection module is arranged inside the buoy body;

[0011] In the first working state, the gas detection module is respectively connected to the first air inlet channel and the first air outlet channel, and is used to detect the concentration of carbon dioxide in the gas input by the first air inlet channel; in the second working state, the gas detection module is respectively connected to the second air inlet channel and the second air outlet channel, and is used to detect the concentration of carbon dioxide in the gas input by the second air inlet channel.

[0012] In one embodiment, the gas detection module comprises:

[0013] Carbon dioxide sensor;

[0014] a first three-way valve, wherein a first valve port of the first three-way valve is communicated with the first air inlet passage, a second valve port of the first three-way valve is communicated with the second air inlet passage, and a third valve port of the first three-way valve is communicated with an input port of the carbon dioxide sensor;

[0015] a second three-way valve, wherein a first valve port of the second three-way valve is communicated with the first air outlet channel, and a second valve port of the second three-way valve is communicated with the second air outlet channel;

[0016] The air pump is connected to the output port of the carbon dioxide sensor and the third valve port of the second three-way valve respectively.

[0017] In one embodiment, the gas detection module further includes:

[0018] A filter, wherein an input port of the filter is connected to the third valve port of the first three-way valve;

[0019] A humidity sensor, wherein the input port of the humidity sensor is communicated with the output port of the filter, and the output port of the humidity sensor is communicated with the input port of the carbon dioxide sensor.

[0020] In one embodiment, the gas-liquid separation module comprises:

[0021] A connecting assembly, detachably connected to the bottom of the buoy body, the connecting assembly being provided with the second air inlet and the second air outlet, and being provided with a liquid inlet and a liquid outlet;

[0022] The gas-liquid separation membrane is located between the second gas inlet and the liquid inlet and between the second gas outlet and the liquid outlet.

[0023] In one embodiment, the connection assembly includes:

[0024] a first connecting member, provided with the second air inlet and the second air outlet, a first mounting groove being provided at the bottom of the buoy body, and the first connecting member being located in the first mounting groove;

[0025] a second connecting member, provided with the liquid inlet and the liquid outlet, a second mounting groove communicating with the first mounting groove being provided at the bottom of the buoy body, the second connecting member being located in the second mounting groove, and the gas-liquid separation membrane being located between the first connecting member and the second connecting member;

[0026] The threaded fastener is inserted through the second connecting member and is threadedly connected to the bottom of the second mounting groove.

[0027] In one embodiment, waterproof and breathable materials are provided at the first air inlet and the first air outlet.

[0028] In one embodiment, the buoy body comprises:

[0029] A float having a cavity, wherein the gas detection module is arranged in the cavity, the gas-liquid separation module is arranged at the bottom of the float, and the float is provided with the second air inlet channel and the second air outlet channel;

[0030] A connector, provided with the first air inlet and the first air outlet;

[0031] A connecting rod is connected between the connecting head and the top of the buoy, and the connecting head, the connecting rod and the buoy jointly define the first air inlet channel and the first air outlet channel.

[0032] In one of the embodiments, the buoy further includes an anemometer, a temperature sensor, and a salinity sensor. The anemometer is arranged on the top of the connector, and the temperature sensor and the salinity sensor are respectively arranged on the bottom of the float.

[0033] In one embodiment, the buoy also includes a solar panel and an energy storage battery. The solar panel is disposed on the top of the float and is electrically connected to the energy storage battery. The energy storage battery is disposed in the cavity and is electrically connected to the gas detection module.

[0034] In one of the embodiments, the buoy body further includes an alarm and an anchor fixing, wherein the alarm is arranged on the connecting head, the anchor fixing is connected to the bottom of the buoy and is provided with a fixing interface for passing an anchor chain.

[0035] The beneficial effects of this application are as follows:

[0036] The present application provides a water-air interface carbon dioxide flux monitoring buoy, comprising a buoy body, a gas-liquid separation module arranged at the bottom of the buoy body, and a gas detection module arranged inside the buoy body. Since a first air inlet and a first air outlet are arranged at the top of the buoy body, the buoy body defines a first air inlet channel and a first air outlet channel, the first air inlet is connected to the first air inlet channel, the first air outlet is connected to the first air outlet channel, the buoy body further defines a second air inlet channel and a second air outlet channel, the second air inlet of the gas-liquid separation module is connected to the second air inlet channel, and is used to input the gas in the water separated by the gas-liquid separation module into the second air inlet channel, and the second air outlet of the gas-liquid separation module is connected to the second air outlet channel. In the first working state, the gas detection module is respectively connected to the first air inlet channel and the first air outlet channel to form an atmospheric carbon dioxide concentration detection gas path. At this time, the gas detection module is used to detect the concentration of carbon dioxide in the gas input by the first air inlet channel, that is, to detect the concentration of carbon dioxide in the atmosphere; in the second working state, the gas detection module is respectively connected to the second air inlet channel and the second air outlet channel to form a water body carbon dioxide concentration detection gas path. At this time, the gas detection module is used to detect the concentration of carbon dioxide in the gas input by the second air inlet channel, that is, to detect the concentration of carbon dioxide in the water body. In this way, the atmospheric carbon dioxide concentration detection and the water body carbon dioxide concentration detection share the same gas detection module, thereby increasing data consistency, reducing system errors, and thus improving the accuracy of carbon dioxide flux monitoring at the water-air interface. At the same time, this also reduces the redundancy of components, making the structure of the buoy more compact and the overall energy consumption lower.

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and understandable, preferred embodiments are specifically listed below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of the structure of a buoy from one perspective in some embodiments of the present application is shown;

[0040] Figure 2 Another perspective structural schematic diagram of a buoy in some embodiments of the present application is shown;

[0041] Figure 3 Another perspective structural schematic diagram of a buoy in some embodiments of the present application is shown;

[0042] Figure 4 Shows Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle;

[0043] Figure 5 It shows the overall gas path schematic diagram of the buoy in some embodiments of the present application;

[0044] Figure 6 A gas circuit diagram of a gas detection module in some embodiments of the present application is shown;

[0045] Figure 7 A schematic cross-sectional structure diagram of a float, a gas detection module and a gas-liquid separation module in some embodiments of the present application is shown.

[0046] Description of main component symbols:

[0047] 100-buoy; 110-buoy body; 111-buoy; 1111-cavity; 1112-second air inlet channel; 1113-second air outlet channel; 1114-first mounting groove; 1115-second mounting groove; 112-connector; 1121-first air inlet; 1122-first air outlet; 1123-waterproof and breathable material; 113-connecting rod; 1131-first air inlet channel; 1132-first air outlet channel; 114-warning device; 115-anchor fixing piece; 1151-fixing interface; 120-gas-liquid separation module; 121-connecting assembly; 1 211-first connecting piece; 12111-second air inlet; 12112-second air outlet; 1212-second connecting piece; 12121-liquid inlet; 12122-liquid outlet; 1213-threaded fastener; 122-gas-liquid separation membrane; 130-gas detection module; 131-carbon dioxide sensor; 132-first three-way valve; 133-second three-way valve; 134-air pump; 135-filter; 136-humidity sensor; 141-anemometer; 143-temperature sensor; 144-salinity sensor; 145-solar panel; 146-energy storage battery. DETAILED DESCRIPTION

[0048] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0049] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0051] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a water-air interface carbon dioxide flux monitoring buoy 100, which relates to the field of carbon dioxide flux monitoring technology, and is mainly used to monitor the carbon dioxide flux at the interface between water bodies and the atmosphere (water-air interface carbon dioxide flux). The water bodies referred to here include but are not limited to oceans, large rivers, streams, lakes, reservoirs, etc., and no specific restrictions are made on the type of water bodies.

[0054] like Figures 3 to 5 As shown, the buoy 100 provided in this embodiment includes: a buoy body 110 , a gas-liquid separation module 120 and a gas detection module 130 .

[0055] The top of the buoy body 110 is provided with a first air inlet 1121 and a first air outlet 1122. The buoy body 110 defines a first air inlet channel 1131 and a first air outlet channel 1132. The first air inlet 1121 is communicated with the first air inlet channel 1131 for inputting gas in the atmosphere into the first air inlet channel 1131. The second air outlet 12112 is communicated with the second air outlet channel 1113. The gas-liquid separation module 120 is provided at the bottom of the buoy body 110 and is provided with a second air inlet 12111 and a second air outlet 12112. The buoy body 110 further defines a second air inlet channel 1112 and a second air outlet channel 1113. The second air inlet 12111 is communicated with the second air inlet channel 1112 for inputting gas in the water separated by the gas-liquid separation module 120 into the second air inlet channel 1112. The second air outlet 12112 is communicated with the second air outlet channel 1113. The gas detection module 130 is disposed inside the buoy body 110 .

[0056] In the first working state, the gas detection module 130 is respectively connected to the first air inlet channel 1131 and the first air outlet channel 1132, and is used to detect the concentration of carbon dioxide in the gas input by the first air inlet channel 1131; in the second working state, the gas detection module 130 is respectively connected to the second air inlet channel 1112 and the second air outlet channel 1113, and is used to detect the concentration of carbon dioxide in the gas input by the second air inlet channel 1112.

[0057] It should be noted that when using the buoy 100 provided in this embodiment, the buoy 100 is placed in the water body, and the buoy 100 will float on the water surface. The bottom of the buoy 100 is located below the water surface, and the top of the buoy 100 is located above the water surface, that is, in the atmosphere above the water surface.

[0058] It can be understood that the buoy 100 provided in the present embodiment has a first air inlet 1121 and a first air outlet 1122 disposed on the top of the buoy body 110, the buoy body 110 defines a first air inlet channel 1131 and a first air outlet channel 1132, the first air inlet 1121 is connected to the first air inlet channel 1131, the first air outlet 1122 is connected to the first air outlet channel 1132, the buoy body 110 further defines a second air inlet channel 1112 and a second air outlet channel 1113, the second air inlet 12111 of the gas-liquid separation module 120 is connected to the second air inlet channel 1112, and is used to input gas in the water separated by the gas-liquid separation module 120 into the second air inlet channel 1112, and the second air outlet 12112 of the gas-liquid separation module 120 is connected to the second air outlet channel 1113.

[0059] In the first working state, the gas detection module 130 is respectively connected to the first air inlet channel 1131 and the first air outlet channel 1132 to form an atmospheric carbon dioxide concentration detection gas circuit. At this time, the gas detection module 130 is used to detect the concentration of carbon dioxide in the gas input by the first air inlet channel 1131, that is, to detect the concentration of carbon dioxide in the atmosphere; in the second working state, the gas detection module 130 is respectively connected to the second air inlet channel 1112 and the second air outlet channel 1113 to form a water body carbon dioxide concentration detection gas circuit. At this time, the gas detection module 130 is used to detect the concentration of carbon dioxide in the gas input by the second air inlet channel 1112, that is, to detect the concentration of carbon dioxide in the water body.

[0060] In this way, atmospheric carbon dioxide concentration detection and water carbon dioxide concentration detection share the same gas detection module 130, thereby increasing data consistency, reducing system errors, and improving the accuracy of water-air interface carbon dioxide flux monitoring. At the same time, this also reduces the redundancy of components, making the structure of the buoy 100 more compact and the overall energy consumption lower.

[0061] like Figure 5 and Figure 6 As shown, in one embodiment, the gas detection module 130 includes: a carbon dioxide sensor 131, a first three-way valve 132, a second three-way valve 133 and an air pump 134. The first valve port of the first three-way valve 132 is in communication with the first air inlet channel 1131, the second valve port of the first three-way valve 132 is in communication with the second air inlet channel 1112, and the third valve port of the first three-way valve 132 is in communication with the input port of the carbon dioxide sensor 131. The first valve port of the second three-way valve 133 is in communication with the first air outlet channel 1132, and the second valve port of the second three-way valve 133 is in communication with the second air outlet channel 1113. The air pump 134 is in communication with the output port of the carbon dioxide sensor 131 and the third valve port of the second three-way valve 133, respectively.

[0062] It should be noted that the carbon dioxide sensor 131 uses optical principles to detect the concentration of carbon dioxide in the gas, and specifically determines the concentration of carbon dioxide through the characteristic absorption of a certain band of light by carbon dioxide in the gas.

[0063] It can be understood that, in the first working state, the first three-way valve 132 is switched to a state in which the first valve port is open, the second valve port is closed, and the third valve port is open, and the second three-way valve 133 is switched to a state in which the first valve port is open, the second valve port is closed, and the third valve port is open. At this time, the atmosphere, the first air inlet 1121, the first air inlet channel 1131, the carbon dioxide sensor 131, the first air outlet channel 1132 and the first air outlet 1122 form an atmospheric carbon dioxide concentration detection air path. Driven by the air pump 134, the gas in the atmosphere is sucked into the carbon dioxide sensor 131, so that the carbon dioxide sensor 131 can detect the concentration of carbon dioxide in the atmosphere. In the second working state, the first three-way valve 132 switches to a state in which the first valve port is closed, the second valve port is opened, and the third valve port is opened, and the second three-way valve 133 switches to a state in which the first valve port is closed, the second valve port is opened, and the third valve port is opened. At this time, the second air inlet 12111, the second air inlet channel 1112, the carbon dioxide sensor 131, the second air outlet channel 1113 and the second air outlet 12112 form a water body carbon dioxide concentration detection gas path, and the gas-liquid separation module 120 performs gas-liquid separation on the water input thereto to obtain gas in the water body. Driven by the air pump 134, the gas is sucked into the carbon dioxide sensor 131, so that the carbon dioxide sensor 131 can detect the concentration of carbon dioxide in the water body.

[0064] It should be noted that when there is no major atmospheric emission source around the monitored water body, the concentration of carbon dioxide in the atmosphere changes little during the daily cycle and does not require high-frequency observation, while the concentration of carbon dioxide in the water body fluctuates greatly during the daily cycle, so high-frequency observation is required for the concentration of carbon dioxide in the water body. Therefore, by using the first three-way valve 132 and the second three-way valve 133 to switch between atmospheric carbon dioxide concentration detection and water body carbon dioxide concentration detection, the energy consumption of the buoy 100 can be further reduced.

[0065] like Figure 5 As shown, further, the gas detection module 130 also includes a filter 135 and a humidity sensor 136. The input port of the filter 135 is communicated with the third valve port of the first three-way valve 132, the input port of the humidity sensor 136 is communicated with the output port of the filter 135, and the output port of the humidity sensor 136 is communicated with the input port of the carbon dioxide sensor 131.

[0066] It is understandable that the filter 135 is a polymer membrane that can intercept water vapor and other small particles to play a role of filtering and secondary protection, reduce the impact of water vapor on the gas path and the carbon dioxide sensor 131, and prevent the entry of liquid water when the gas-liquid separation module 120 fails. At the same time, since the humidity change in the gas to be tested will affect the detection result of the carbon dioxide sensor 131, a humidity sensor 136 is set to detect the humidity of the gas, so as to facilitate the subsequent correction of the calculation result of the carbon dioxide partial pressure.

[0067] like Figures 3 to 5 As shown, in one embodiment, the gas-liquid separation module 120 includes a connection component 121 and a gas-liquid separation membrane 122. The connection component 121 is detachably connected to the bottom of the buoy body 110. The connection component 121 is provided with a second air inlet 12111 and a second air outlet 12112, and is provided with a liquid inlet 12121 and a liquid outlet 12122. The gas-liquid separation membrane 122 is located between the second air inlet 12111 and the liquid inlet 12121 and between the second air outlet 12112 and the liquid outlet 12122.

[0068] It can be understood that the setting of the gas-liquid separation membrane 122 plays a role in gas-liquid separation. The water input from the liquid inlet 12121 is degassed through the gas-liquid separation membrane 122 and then discharged from the liquid outlet 12122. The degassed gas enters the carbon dioxide sensor 131 through the second air inlet channel 1112 to detect the carbon dioxide concentration. The detected gas is discharged from the second air outlet 12112 through the second air outlet channel 1113.

[0069] like Figure 5 and Figure 7As shown, further, the connection assembly 121 includes a first connection member 1211, a second connection member 1212 and a threaded fastener 1213, the first connection member 1211 is provided with a second air inlet 12111 and a second air outlet 12112, the bottom of the buoy body 110 is provided with a first mounting groove 1114, and the first connection member 1211 is located in the first mounting groove 1114. The second connection member 1212 is provided with a liquid inlet 12121 and a liquid outlet 12122, the bottom of the buoy body 110 is provided with a second mounting groove 1115 communicating with the first mounting groove 1114, the second connection member 1212 is located in the second mounting groove 1115, and the gas-liquid separation membrane 122 is located between the first connection member 1211 and the second connection member 1212. The threaded fastener 1213 is penetrated through the second connection member 1212 and is threadedly connected to the bottom of the second mounting groove 1115. In this way, a detachable connection between the gas-liquid separation module 120 and the buoy body 110 is achieved, so that the gas-liquid separation module 120 can be installed, disassembled and maintained without disassembling the internal components of the buoy body 110, reducing the possibility of water leakage into the buoy body 110. At the same time, since the gas-liquid separation module 120 is in direct contact with the water body, it is easy to absorb impurities in the water body, causing damage to the gas-liquid separation module 120, which makes the gas-liquid separation module 120 the only consumable on the entire buoy 100. By detachably connecting the gas-liquid separation module 120 to the bottom of the buoy body 110, the installation, disassembly, maintenance and other processes thereof are simplified.

[0070] In addition, the first installation groove 1114 and the second installation groove 1115 are connected to each other to form a stepped structure, which can play a better limiting role on the connection component 121, so that the gas-liquid separation module 120 has higher stability on the buoy body 110.

[0071] Exemplarily, the threaded fastener 1213 may be a screw, a bolt, or another element having a threaded rod, and no specific limitation is imposed on the type of the threaded fastener 1213 .

[0072] like Figure 5 As shown, in one embodiment, a waterproof and breathable material 1123 is provided at the first air inlet 1121 and the first air outlet 1122 .

[0073] It is understandable that since the first air inlet 1121 and the first air outlet 1122 are connected to the outside atmosphere, water can easily be rushed into the first air inlet 1121 and the first air outlet 1122 when there is atmospheric precipitation or strong winds and waves on the water surface, and enter the atmospheric carbon dioxide detection gas path, causing damage. By arranging a waterproof and breathable material 1123 at the first air inlet 1121 and the first air outlet 1122, water can be prevented from entering the atmospheric carbon dioxide detection gas path, and at the same time, it will not hinder the normal inflow and outflow of gas.

[0074] like Figures 1 to 5 As shown, in one embodiment, the buoy body 110 includes a buoy 111, a connector 112 and a connecting rod 113. The buoy 111 has a cavity 1111, the gas detection module 130 is arranged in the cavity 1111, the gas-liquid separation module 120 is arranged at the bottom of the buoy 111, and the buoy 111 is provided with a second air inlet channel 1112 and a second air outlet channel 1113. The connector 112 is provided with a first air inlet 1121 and a first air outlet 1122, and the connecting rod 113 is connected between the connector 112 and the top of the buoy 111, and the connector 112, the connecting rod 113 and the buoy 111 jointly define a first air inlet channel 1131 and a first air outlet channel 1132.

[0075] It is understandable that, by setting the float 111, it has a cavity 1111, which can provide buoyancy so that the buoy 100 can be suspended on the water body. By setting the connecting rod 113, the height of the connecting head 112 can be raised so that the first air inlet 1121 and the first air outlet 1122 are located in the atmosphere, so as to inhale the gas in the atmosphere and detect the carbon dioxide concentration in the atmosphere.

[0076] like Figure 1 and Figure 2 As shown, further, the buoy 100 also includes an anemometer 141 , a temperature sensor 143 , and a salinity sensor 144 . The anemometer 141 is arranged on the top of the connector 112 , and the temperature sensor 143 and the salinity sensor 144 are arranged on the bottom of the float 111 .

[0077] It is understandable that, in addition to detecting the partial pressure of carbon dioxide in the atmosphere and the partial pressure of carbon dioxide in the water body, the following data also need to be detected simultaneously when monitoring the carbon dioxide flux at the water-air interface by the partial pressure difference method: water temperature, salinity, wind speed at a certain height from the water surface, etc. By arranging an anemometer 141 at the top of the connector 112, it is convenient to detect the wind speed at a certain height from the water surface, by arranging a temperature sensor 143 at the bottom of the buoy 111, it is convenient to detect the water temperature of the water body, and by arranging a salinity sensor 144 at the bottom of the buoy 111, it is convenient to detect the salinity of the water body, thereby facilitating the subsequent calculation of these parameters to obtain the carbon dioxide flux at the water-air interface.

[0078] like Figure 1 , Figure 3 and Figure 4 As shown, further, the buoy 100 also includes a solar panel 145 and an energy storage battery 146. The solar panel 145 is arranged on the top of the float 111 and is electrically connected to the energy storage battery 146. The energy storage battery 146 is arranged in the cavity 1111 and is electrically connected to the gas detection module 130.

[0079] It is understandable that by arranging the solar panel 145 on the top of the buoy 111, it can convert solar energy into electrical energy and store it through the energy storage battery 146, so that the gas detection module 130 can be powered by the energy storage battery 146. At the same time, when other electrical devices (such as anemometer 141, temperature sensor 143, salinity sensor 144, alarm 114, etc.) are configured in the buoy 100, they are also electrically connected to these electrical devices through the energy storage battery 146 for power supply.

[0080] like Figures 1 to 3 As shown, further, the buoy body 110 also includes an alarm 114 and an anchor fixing 115. The alarm 114 is arranged on the connector 112. The anchor fixing 115 is connected to the bottom of the buoy 111 and is provided with a fixing interface 1151 for passing the anchor chain.

[0081] It is understandable that the setting of the alarm 114 is convenient for reminding passing ships to avoid at night. The setting of the anchor fixing member 115 with the fixing interface 1151 is convenient for threading the anchor chain, so that the buoy 100 is stably suspended on the water body.

[0082] Exemplarily, the alarm 114 may be a warning light or a sound alarm 114 , and no specific limitation is made to the type of the alarm 114 herein.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0084] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A buoy for monitoring carbon dioxide flux at a water-air interface, characterized in that: include: A buoy body (110) is provided with a first air inlet (1121) and a first air outlet (1122) at the top thereof, the buoy body (110) defines a first air inlet channel (1131) and a first air outlet channel (1132), the first air inlet (1121) is communicated with the first air inlet channel (1131) and is used to input gas from the atmosphere into the first air inlet channel (1131), and the first air outlet (1122) is communicated with the first air outlet channel (1132); A gas-liquid separation module (120) is arranged at the bottom of the buoy body (110) and is provided with a second air inlet (12111) and a second air outlet (12112); the buoy body (110) further defines a second air inlet channel (1112) and a second air outlet channel (1113); the second air inlet (12111) is communicated with the second air inlet channel (1112) and is used for inputting gas in the water separated by the gas-liquid separation module (120) into the second air inlet channel (1112); the second air outlet (12112) is communicated with the second air outlet channel (1113); A gas detection module (130) is arranged inside the buoy body (110); In a first working state, the gas detection module (130) is respectively connected to the first air inlet channel (1131) and the first air outlet channel (1132) for detecting the concentration of carbon dioxide in the gas input by the first air inlet channel (1131); in a second working state, the gas detection module (130) is respectively connected to the second air inlet channel (1112) and the second air outlet channel (1113) for detecting the concentration of carbon dioxide in the gas input by the second air inlet channel (1112).

2. The water-air interface carbon dioxide flux monitoring buoy according to claim 1, characterized in that: The gas detection module (130) comprises: Carbon dioxide sensor (131); a first three-way valve (132), wherein a first valve port of the first three-way valve (132) is in communication with the first air inlet passage (1131), a second valve port of the first three-way valve (132) is in communication with the second air inlet passage (1112), and a third valve port of the first three-way valve (132) is in communication with an input port of the carbon dioxide sensor (131); a second three-way valve (133), wherein a first valve port of the second three-way valve (133) is in communication with the first air outlet channel (1132), and a second valve port of the second three-way valve (133) is in communication with the second air outlet channel (1113); The air pump (134) is respectively connected to the output port of the carbon dioxide sensor (131) and the third valve port of the second three-way valve (133).

3. The water-air interface carbon dioxide flux monitoring buoy according to claim 2, characterized in that: The gas detection module (130) further comprises: A filter (135), wherein an input port of the filter (135) is in communication with a third valve port of the first three-way valve (132); A humidity sensor (136), wherein the input port of the humidity sensor (136) is communicated with the output port of the filter (135), and the output port of the humidity sensor (136) is communicated with the input port of the carbon dioxide sensor (131).

4. The water-air interface carbon dioxide flux monitoring buoy according to claim 1, characterized in that: The gas-liquid separation module (120) comprises: a connecting component (121) detachably connected to the bottom of the buoy body (110), the connecting component (121) being provided with the second air inlet (12111) and the second air outlet (12112), and being provided with a liquid inlet (12121) and a liquid outlet (12122); The gas-liquid separation membrane (122) is located between the second gas inlet (12111) and the liquid inlet (12121) and between the second gas outlet (12112) and the liquid outlet (12122).

5. The water-air interface carbon dioxide flux monitoring buoy according to claim 4, characterized in that: The connection component (121) comprises: a first connecting member (1211) provided with the second air inlet (12111) and the second air outlet (12112); a first mounting groove (1114) is provided at the bottom of the buoy body (110); and the first connecting member (1211) is located in the first mounting groove (1114); a second connecting member (1212) provided with the liquid inlet (12121) and the liquid outlet (12122); a second mounting groove (1115) communicating with the first mounting groove (1114) is provided at the bottom of the buoy body (110); the second connecting member (1212) is located in the second mounting groove (1115); and the gas-liquid separation membrane (122) is located between the first connecting member (1211) and the second connecting member (1212); A threaded fastener (1213) is inserted through the second connecting member (1212) and is threadedly connected to the bottom of the second mounting groove (1115).

6. The water-air interface carbon dioxide flux monitoring buoy according to any one of claims 1 to 5, characterized in that: Waterproof and breathable material (1123) is provided at the first air inlet (1121) and the first air outlet (1122).

7. The water-air interface carbon dioxide flux monitoring buoy according to any one of claims 1 to 5, characterized in that: The buoy body (110) comprises: A float (111) having a cavity (1111), the gas detection module (130) being arranged in the cavity (1111), the gas-liquid separation module (120) being arranged at the bottom of the float (111), and the float (111) being provided with the second air inlet channel (1112) and the second air outlet channel (1113); A connecting head (112) provided with the first air inlet (1121) and the first air outlet (1122); A connecting rod (113) is connected between the connecting head (112) and the top of the buoy (111); the connecting head (112), the connecting rod (113) and the buoy (111) jointly define the first air inlet channel (1131) and the first air outlet channel (1132).

8. The water-air interface carbon dioxide flux monitoring buoy according to claim 7, characterized in that: The buoy also includes an anemometer (141), a temperature sensor (143), and a salinity sensor (144); the anemometer (141) is arranged on the top of the connector (112); the temperature sensor (143) and the salinity sensor (144) are respectively arranged on the bottom of the float (111).

9. The water-air interface carbon dioxide flux monitoring buoy according to claim 7, characterized in that: The buoy also includes a solar panel (145) and an energy storage battery (146). The solar panel (145) is arranged on the top of the float (111) and is electrically connected to the energy storage battery (146). The energy storage battery (146) is arranged in the cavity (1111) and is electrically connected to the gas detection module (130).

10. The water-air interface carbon dioxide flux monitoring buoy according to claim 7, characterized in that: The buoy body (110) further comprises an alarm (114) and an anchor fixing member (115), wherein the alarm (114) is arranged on the connecting head (112), and the anchor fixing member (115) is connected to the bottom of the buoy (111) and is provided with a fixing interface (1151) for passing an anchor chain.

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