Forest grassland soil carbon flux characteristic change analysis system and method

Abstract

The invention discloses a forest grassland soil carbon flux characteristic change analysis system and method. The system comprises a remote monitoring terminal; a plurality of acquisition modules; the host mechanism is connected with an acquisition module through a connecting cable assembly, and the host mechanism is further wirelessly connected with a remote monitoring terminal; wherein the connecting cable assembly comprises a cable main body, the outer side of the cable main body is sleeved with a protective sleeve, and the two ends of the protective sleeve are connected with the acquisition module and the host mechanism respectively; and the plurality of groups of fixing pieces are arranged between the cable main body and the protective sleeve, and the plurality of groups of fixing pieces are communicated with an air supply piece. The cable main body is protected through the protection sleeve, the situation that the cable main body is trampled, rolled or subjected to other physical damage is reduced, the fixing piece works through the air supply piece to fix the protection sleeve and the contact ground, the cable main body is prevented from moving or being damaged due to natural factors such as wind blowing, solarization and raining, long-term stable data transmission is guaranteed, and the service life of the cable is prolonged. And the accuracy of an analysis result is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of soil carbon flux monitoring, and particularly to a system and method for analyzing the characteristic changes of soil carbon flux in forest and grasslands. Background Art

[0002] The soil carbon emissions in forest and grasslands in the urban-rural fringe are closely related to urban carbon emissions. Analyzing the characteristic changes of soil carbon flux in forest and grasslands in the urban-rural fringe helps to evaluate the potential of forest and grassland ecosystems in carbon sequestration and emission reduction in the urban-rural fringe.

[0003] Currently, when analyzing the characteristic changes of soil carbon flux in forest and grasslands in the urban-rural fringe, a collection module (such as a fixed measurement chamber) is usually arranged in the forest and grasslands in the urban-rural fringe for long-term continuous measurement of soil carbon flux data. Subsequently, these soil carbon flux data are transmitted to an analysis module through a specific transmission method, such as cable connection, and analyzed by the analysis module to obtain the results of the characteristic changes of soil carbon flux. However, this method is prone to the following problems during long-term use: the cables used to connect the analysis module and the collection module are usually laid on the ground and are easily moved or damaged by natural factors such as wind, sun, and rain, resulting in unstable or interrupted data transmission. This not only affects the continuity and integrity of the data but may also mislead the analysis results. Therefore, we propose a system and method for analyzing the characteristic changes of soil carbon flux in forest and grasslands. Summary of the Invention

[0004] The purpose of the present invention is to provide a system and method for analyzing the characteristic changes of soil carbon flux in forest and grasslands to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A system for analyzing the characteristic changes of soil carbon flux in forest and grasslands includes:

[0007] A remote monitoring terminal;

[0008] A plurality of collection modules for collecting soil carbon flux data in forest and grasslands;

[0009] A main machine structure connected to a collection module through a connection cable assembly, for receiving the collected soil carbon flux data in forest and grasslands and analyzing them to obtain analysis results, and the main machine structure is also wirelessly connected to the remote monitoring terminal;

[0010] Among them, the connection cable assembly includes:

[0011] A cable body, with a protective sleeve sleeved on its outer side, and the two ends of the protective sleeve are respectively connected to the collection module and the main machine structure;

[0012] A number of sets of fixing components are arranged between the cable main body and the protective sleeve, and the positions between adjacent fixing components are filled with elastic filler. A number of sets of fixing components are all connected to a gas supply component, and the gas supply component is used to drive the fixing components to work so that the protective sleeve is fixed in contact with the ground.

[0013] The further improvement lies in that the main machine mechanism includes a main machine box, and an analysis module, a controller, a photovoltaic power supply device and a wireless communication device arranged in the main machine box.

[0014] The further improvement lies in that the acquisition module includes:

[0015] A mounting plate, on which a partition cylinder with a hollow bottom is screwed, and insertion feet for inserting and contacting the ground are arranged at the bottom of the mounting plate;

[0016] A detection sensor, whose detection end is inside the partition cylinder, is used to collect the carbon flux data of forest and grassland soil, and the detection sensor is connected to one end of the cable main body.

[0017] The further improvement lies in that the fixing component includes:

[0018] An annular bearing seat, with a groove opened at the bottom, and a positioning part driven by the gas supply component to insert and contact the ground is slidably arranged in the groove;

[0019] A reset part is arranged in the movable cavity opened in the annular bearing seat and is driven by the gas supply component to work, thereby driving the positioning part to reset.

[0020] The further improvement lies in that the positioning part includes:

[0021] A movable plate I is movably arranged in the groove. An insertion block is arranged at the bottom of the movable plate I, and the insertion block moves with the movable plate I through the through hole opened at the bottom of the protective sleeve and inserts into contact with the ground;

[0022] An elastic guiding part is arranged in the groove and connected to the movable plate I, and is used to drive the movable plate I to reset when the reset part works.

[0023] The further improvement lies in that an assembly groove is jointly opened on the movable plate I and the insertion block, and a movable plate II driven by the gas supply component is slidably arranged in the assembly groove. The movable plate II is connected with a trapezoidal block. The trapezoidal block is connected with the bottom of the assembly groove through an elastic part I. A number of groups of horizontal insertion rods are inserted into the side wall of the insertion block. An elastic part II is arranged at the connection part of the horizontal insertion rod and the insertion block. One end of the horizontal insertion rod is slidably connected with the trapezoidal block, and the other end is driven by the trapezoidal block to move outwards and extend to the outside of the insertion block when the trapezoidal block moves downwards.

[0024] A further improvement lies in that an extension groove one is formed in the inner wall of the assembly groove, and a magnetic block capable of magnetically adsorbing the movable plate two is movably arranged in the extension groove one. The magnetic block is connected to the inner wall of the extension groove one through an elastic member three. An extension groove two is formed in the bottom of the movable plate one, and a moving block is slidably arranged in the extension groove two. The moving block is connected to the inner wall of the extension groove two through an elastic member four. The moving block and the magnetic block are connected through a pull rope one. The moving block is pushed upward by a push rod. When it moves upward, the magnetic block is pulled through the pull rope one to be separated from the movable plate two, so that the movable plate two can move downward under the drive of the air supply member. The push rod is arranged on the bottom wall of the protective sleeve and is located in the groove.

[0025] A further improvement lies in that the air supply member includes:

[0026] A channel is formed in the annular bearing seat and communicates with the groove. The two ends of the channel are respectively provided with a connected intake end and an air outlet end.

[0027] A connecting pipeline one is arranged between two adjacent groups of annular bearing seats and connects the intake ends and the air outlet ends in the channels of two adjacent groups.

[0028] The intake end of the channel closest to the main machine mechanism communicates with the branch pipe two. One end of the branch pipe two penetrates through the outer wall of the protective sleeve and is connected to the output end of the air supply device arranged in the main machine mechanism. An electromagnetic valve is arranged on the branch pipe two. The air outlet end of the channel closest to the acquisition module is closed.

[0029] It further includes a branch pipe one. The branch pipe one communicates with the movable cavity. One end of it penetrates through the outer wall of the protective sleeve and is detachably connected to the output end of the air supply device. An electromagnetic valve is arranged in the branch pipe one.

[0030] A further improvement lies in that the reset part includes:

[0031] A movable plate three is driven to move by the gas fed into the movable cavity by the air supply member. The movable plate three is connected to one side inner wall of the movable cavity through an elastic member five.

[0032] Two air outlet holes are respectively formed in the annular bearing seat and are located on both sides of the groove. One ends of the two air outlet holes respectively communicate with the intake end and the air outlet end. The other ends penetrate through the bottom of the protective sleeve. A conduction seat is movably arranged in both the intake end and the air outlet end. Elastic members six connecting the conduction seats are arranged on the inner walls of both the intake end and the air outlet end. A guiding flow channel is arranged in the conduction seat. The conduction seat is connected to the movable plate three through a pull rope two. When the movable plate three is driven to move by the gas, the pull rope two pulls the conduction seat to move to a preset position, so that the guiding flow channel, the air outlet hole and the channel are communicated. When the movable plate three moves back to its original position, the conduction seat is driven by the elastic member six to reset, so that the channel, the intake end, the air outlet end and the connecting pipeline one are communicated.

[0033] A method for analyzing the characteristics of soil carbon flux in forest and grassland areas, using the above analysis system, includes the following steps:

[0034] S1: Install several collection modules in the forest and grassland areas to be monitored respectively, connect the collection modules to the mainframe through the connection cable assembly, send a control signal to the mainframe through the remote monitoring terminal, and the mainframe makes several collection modules work through the connection cable assembly; among them, after connecting the collection modules to the mainframe through the connection cable assembly, lay the cable body on the ground in contact, and then control the gas supply part to drive the fixing part to work, so that the protective sleeve is fixed to the ground in contact;

[0035] S2: The collection module collects the soil carbon flux data of the forest and grassland areas in a preset time period, sends the collected soil carbon flux data of the forest and grassland areas to the mainframe through the connection cable assembly, analyzes it through the mainframe to obtain an analysis result, and sends the analysis result to the remote monitoring terminal.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] The present invention connects the collection module and the mainframe through the cable assembly. The cable body in the cable assembly is protected by the protective sleeve, reducing the risk of the cable body being trampled, crushed or damaged by other physical means, extending the service life of the cable body. Moreover, the cable assembly cooperates with the fixing part and the gas supply part. The gas supply part makes the fixing part work to fix the protective sleeve to the ground in contact, preventing the cable body from moving or being damaged due to natural factors such as wind, sun and rain, ensuring long-term stable data transmission, and improving the accuracy of the analysis result. Description of the Drawings

[0038] Figure 1 It is a schematic diagram of the analysis system of the present invention;

[0039] Figure 2 It is a cross-sectional view of the structure of the connection cable assembly of the present invention;

[0040] Figure 3 For the present invention Figure 1 The enlarged view of structure A in;

[0041] Figure 4 For the present invention Figure 1 The enlarged view of structure B in.

[0042] In the figure: 100, main body mechanism; 200, acquisition module; 201, mounting plate; 202, insertion pin; 203, partition cylinder; 204, detection sensor; 300, connection cable assembly; 301, cable main body; 302, protective sleeve; 303, channel; 304, annular bearing seat; 305, elastic filler; 306, connection pipeline 1; 307, branch pipe 1; 308, branch pipe 2; 309, movable plate 1; 310, insertion block; 311, elastic guide; 312, movable plate 2; 313, trapezoidal block; 314, horizontal insertion rod; 315, magnetic block; 316, pull rope 1; 317, ejector rod; 318, movable cavity; 319, movable plate 3; 320, air outlet; 321, pull rope 2; 323, conduction seat. Specific implementation mode

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection scope of the present invention.

[0044] Embodiment 1

[0045] Please refer to the attached Figure 1 - attached Figure 2 , a system for analyzing the characteristics of soil carbon flux in forest and grassland, comprising:

[0046] Remote monitoring terminal;

[0047] A plurality of acquisition modules 200 for acquiring soil carbon flux data in forest and grassland;

[0048] The main body mechanism 100 is connected to an acquisition module 200 through a connection cable assembly 300, and is used to receive the acquired soil carbon flux data in forest and grassland and perform analysis to obtain an analysis result. The main body mechanism is also wirelessly connected to the remote monitoring terminal;

[0049] The remote monitoring terminal belongs to a conventional device in the art. The remote monitoring terminal usually includes a display module and an early warning module, etc. Among them, the display module is used to display the analysis result, and the early warning module is used to give a reminder alarm when the analysis result exceeds or reaches a preset threshold or rule. The reminder alarm can be in the form of sound, light, screen display, etc.;

[0050] The main body mechanism 100 includes a main chassis, and an analysis module, a controller, a photovoltaic power supply device, and a wireless communication device provided in the main chassis. Among them, the analysis module can perform calculation and analysis processing on the acquired soil carbon flux data in forest and grassland. For example, using the temperature sensitivity of soil carbon flux (Q 10)Calculated using the exponential relationship model:

[0051] R = ae bt

[0052] Q 10 = e 10b

[0053] where R is the soil carbon flux (μmolm -2 s -1 ), t is the soil temperature (°C), a and b are undetermined parameters, and Q 10 is the temperature sensitivity index, indicating the sensitivity of soil carbon flux to temperature;

[0054] Or calculate using the soil carbon dioxide emission (WDsCE), and the calculation formula is as follows:

[0055]

[0056] where W DSCE is the daily soil carbon dioxide emission (mgm -2 d -1 ); n represents the number of times of measuring soil carbon flux per day, n = 12; T represents the time interval between two measurements, which is 2h in this article, that is, 7200s; R i is the soil carbon flux measured every 2h (μmolm -2 s -1 ), which represents the average soil carbon flux within 2 hours in this article; 44 is the relative molecular mass of CO2;

[0057] Use W DSCE to statistically calculate the monthly soil carbon dioxide emission (gm -2 m -1 ), and then estimate the annual soil carbon dioxide emission (gm -2 a -1 );

[0058] Use Excel 2010 and SPSS 21.0 software for data analysis and statistics. Use one-way ANOVA to test the significance of differences in soil carbon flux among different forest and grasslands (P < 0.05); use an exponential regression equation to fit the relationship between soil carbon flux and soil temperature and solar radiation intensity; use a quadratic function to fit the relationship between soil carbon flux and rainfall, and use Origin 2017 and Excel 2010 to plot the analysis results;

[0059] The above-mentioned controller is used to control the electrical components in the acquisition module;

[0060] The photovoltaic power supply device includes a photovoltaic solar panel and a storage battery, etc., and is used to supply power to the electrical components in the host mechanism and the acquisition module;

[0061] The wireless communication device is used to enable remote communication between the host mechanism and the remote monitoring terminal;

[0062] Among them, the connection cable assembly 300 includes:

[0063] A cable main body 301, on the outer side of which is sleeved with a protective sleeve 302. The two ends of the protective sleeve 302 are respectively connected to the acquisition module 200 and the host mechanism 100. The protective sleeve 302 can be made of rubber material to protect the cable main body 301 and prevent the cable main body 301 from being trampled, crushed or damaged by other physical means;

[0064] Several groups of fixing members are provided between the cable main body 301 and the protective sleeve 302. The position between adjacent fixing members is filled with an elastic filler 305. The elastic filler 305 is an elastic rubber material to improve the compressive performance of the cable main body 301. Each of the several groups of fixing members is connected to a gas supply member, and the gas supply member is used to drive the fixing members to work so that the protective sleeve 302 is fixed to the ground in contact to prevent it from moving or being damaged due to natural factors such as wind, sun, and rain.

[0065] A method for analyzing the characteristics of forest and grassland soil carbon flux using the above analysis system includes the following steps:

[0066] S1: Install several acquisition modules 200 in the forest and grassland areas to be monitored respectively, connect the acquisition modules 200 to the host mechanism 100 through the connection cable assembly 300, send a control signal from the remote monitoring terminal to the host mechanism 100, and the host mechanism 100 makes several acquisition modules 200 work through the connection cable assembly 300; among them, after connecting the acquisition modules 200 to the host mechanism 100 through the connection cable assembly 300, lay the cable main body 301 on the ground in contact, and then control the gas supply member to drive the fixing members to work so that the protective sleeve 302 is fixed to the ground in contact;

[0067] S2: The acquisition module 200 acquires the forest and grassland soil carbon flux data for a preset time period, and sends the acquired forest and grassland soil carbon flux data to the host mechanism 100 through the connection cable assembly 300. The host mechanism 100 analyzes it to obtain an analysis result, and sends the analysis result to the remote monitoring terminal.

[0068] Embodiment Two

[0069] Please refer to the appendix Figure 1 , on the basis of Embodiment One, the acquisition module 200 of this embodiment includes:

[0070] The mounting plate 201 is threadedly inserted with a partition cylinder 203 having a hollow bottom. The bottom of the mounting plate 201 is provided with insertion feet 202 for inserting and contacting the ground, which are used to fix the mounting plate 201 in the forest and grassland area to be monitored. A sealing ring can also be embedded at the bottom of the partition cylinder 203 to improve the sealing between the bottom of the partition cylinder 203 and the ground in contact;

[0071] The detection sensor 204, whose detection end is inside the partition cylinder 203, is used to collect the soil carbon flux data of the forest and grassland. The detection sensor 204 is connected to one end of the cable main body 301. The detection sensor 204 is, for example: a soil temperature and humidity sensor (model, for example, SHT30), a soil gas concentration sensor (model, for example, Soil-GMP252), and a soil conductivity sensor (model, for example, JXBS-3001 series), etc.;

[0072] During use, the mounting plate 201 is fixed to the ground in contact in the forest and grassland area to be monitored through the insertion feet 202. Then, the partition cylinder 203 is rotated so that its bottom contacts the ground, and then the soil carbon flux data of the forest and grassland can be collected through the detection sensor 204.

[0073] Embodiment Three

[0074] Please refer to the attached Figure 2 - attached Figure 4 Based on Embodiment One, the fixing member in this embodiment includes:

[0075] The annular bearing seat 304 has a groove at its bottom, and a positioning portion that is driven by a gas supply member to insert and contact the ground is slidably provided in the groove;

[0076] The reset portion is arranged in the movable cavity 318 opened in the annular bearing seat 304 and is driven by the gas supply member to work, thereby driving the positioning portion to reset for later recovery.

[0077] Preferably, the positioning portion in this embodiment includes:

[0078] The movable plate one 309 is movably arranged in the groove. An insertion block 310 is provided at the bottom of the movable plate one 309. The insertion block 310 moves through the through opening provided at the bottom of the protective sleeve 302 along with the movable plate one 309 and inserts into contact with the ground;

[0079] The elastic guiding member 311 is arranged in the groove and connects the movable plate one 309, and is used to drive the movable plate one 309 to reset when the reset portion works. The elastic guiding member 311, for example, includes a guide rod arranged in the groove and movably passing through the movable plate one 309, and a spring sleeved on the outer wall of the guide rod. One end of the spring is connected to the inner wall of the groove, and the other end is connected to the movable plate one 309.

[0080] Lay the cable body 301 on the contact ground, control the air supply component to work, and then gas enters the groove to drive the first movable plate 309 to drive the insertion block 310 to insert into the contact ground, fixing the cable body 301 to the contact ground. When the reset part works, the gas in the groove is discharged, and the first movable plate 309 is reset upward under the action of the elastic guiding member 311, thereby driving the insertion block 310 to disengage from the contact ground.

[0081] Embodiment 4

[0082] Please refer to the appendix Figure 3 - Appendix Figure 4 On the basis of Embodiment 3, an assembly groove is jointly formed on the first movable plate 309 and the insertion block 310 in this embodiment. A second movable plate 312 driven by the air supply component is slidably arranged in the assembly groove. The second movable plate 312 is connected with a trapezoidal block 313. The trapezoidal block 313 is connected with the bottom of the assembly groove through a first elastic member. A plurality of groups of horizontal insertion rods 314 are inserted into the side wall of the insertion block 310. An elastic member is arranged at the connection of the horizontal insertion rod 314 and the insertion block 310. One end of the horizontal insertion rod 314 is slidably connected with the trapezoidal block 313, and the other end thereof is driven by the trapezoidal block 313 to move outward and extend out of the insertion block 310 when the trapezoidal block 313 moves downward;

[0083] The above-mentioned first elastic member and second elastic member are both springs. When gas enters the groove, it drives the first movable plate 309 to drive the insertion block 310 downward. When it moves downward, the second movable plate 312 also drives the trapezoidal block 313 downward. When the trapezoidal block 313 moves downward, its inclined surface is used to drive the horizontal insertion rod 314 to move outward and extend out of the insertion block 310. In this way, the contact area between the insertion block 310 and the soil of the contact ground can be increased, and the fixing force between the connecting cable assembly 300 and the contact ground can be improved, so that the connecting cable assembly 300 is not easily separated from the contact ground by the force in the vertical direction.

[0084] Embodiment 5

[0085] Please refer to the appendix Figure 4, on the basis of the fourth embodiment, an extension groove one is opened on the inner wall of the assembly groove in this embodiment, and a magnetic block 315 capable of magnetically adsorbing the movable plate two 312 is movably arranged in the extension groove one. The movable plate two 312 is made of, for example, a metal material. When the magnetic block 315 adsorbs the movable plate two 312, it can prevent the gas from causing the movable plate two 312 to move downward synchronously when driving the movable plate one 309 to drive the insertion block 310 downward, avoiding the premature extension of the horizontal insertion rod 314 and affecting the insertion of the insertion block 310 into contact with the ground. The magnetic block 315 is connected to the inner wall of the extension groove one through an elastic member three. An extension groove two is opened at the bottom of the movable plate one 309, and a moving block is slidably arranged in the extension groove two. The moving block is connected to the inner wall of the extension groove two through an elastic member four. Both the elastic member three and the elastic member four can be springs. The moving block is connected to the magnetic block 315 through a pulling rope one 316. A guiding wheel structure for guiding the pulling rope one 316 is arranged in the extension groove two. The moving block is pushed upward by a top rod 317. When it moves upward, it pulls the magnetic block 315 away from the movable plate two 312 through the pulling rope one 316, so that the movable plate two 312 can move downward under the drive of the air supply member. The top rod 317 is arranged on the bottom wall of the protective sleeve 302 and is located in the groove;

[0086] In this way, after the movable plate one 309 drives the insertion block 310 to move downward into contact with the preset position on the ground, if the movable plate one 309 continues to move downward, it will cause the top rod 317 to push the moving block upward. The moving block drives the magnetic block 315 away from the movable plate two 312 through the pulling rope one 316. At this time, the movable plate two 312 loses the magnetic attraction fixing force of the magnetic block 315, and under the continuous entry of the gas into the groove, the movable plate two 312 starts to move downward.

[0087] Embodiment Six

[0088] Please refer to the attached Figure 2 - attached Figure 4 , on the basis of the third embodiment, the air supply member includes:

[0089] A channel 303 is opened in the annular bearing seat 304 and is communicated with the groove. An air inlet end and an air outlet end that are communicated with each other are respectively arranged at both ends of the channel 303;

[0090] A connecting pipeline one 306 is arranged between two adjacent groups of annular bearing seats 304 and connects the air inlet ends and the air outlet ends in two adjacent groups of channels 303;

[0091] The air inlet end of the channel 303 closest to the main machine mechanism 100 is communicated with a branch pipe two 308. One end of the branch pipe two 308 penetrates the outer wall of the protective sleeve 302 and is communicated with the output end of the air supply device arranged in the main machine mechanism 100. The air supply device is, for example, an air supply pump. An electromagnetic valve is arranged on the branch pipe two 308. The air outlet end of the channel 303 closest to the acquisition module 200 is closed to prevent gas from being discharged from the air outlet end of the channel 303 closest to the acquisition module 200;

[0092] It further includes a first branch pipe 307. The first branch pipe 307 communicates with the movable cavity 318. One end of it penetrates through the outer wall of the protective sleeve 302 and is detachably communicated with the output end of the gas supply device. The two can be connected by structures such as flanges, and a solenoid valve is provided in the first branch pipe 307.

[0093] During use, by opening the solenoid valve on the second branch pipe 308 and then turning on the gas supply device, the gas supply device supplies gas into the second branch pipe 308. The gas flows in the first connecting pipe 306, the channel 303, the intake end and the outlet end and enters the groove to drive the first movable plate 309 to move in the groove. When it is necessary to drive the reset part to work, by closing the solenoid valve on the second branch pipe 308 and opening the solenoid valve on the first branch pipe 307, the gas supplied by the gas supply device can enter the movable cavity 318.

[0094] Embodiment Seven

[0095] Please refer to the attached Figure 3 - attached Figure 4 , on the basis of Embodiment Six, the reset part includes:

[0096] A third movable plate 319, which is driven to move by the gas supplied into the movable cavity 318 by the gas supply part. The third movable plate 319 is connected to one side inner wall of the movable cavity 318 through a fifth elastic part. The fifth elastic part is, for example, a spring;

[0097] Two groups of air outlet holes 320 are respectively opened in the annular bearing seat 304 and are located on both sides of the groove. One ends of the two groups of air outlet holes 320 are respectively communicated with the intake end and the outlet end, and the other ends penetrate through the bottom of the protective sleeve 302. A conduction seat 323 is movably provided in both the intake end and the outlet end, and a sixth elastic part connecting the conduction seat 323 is provided on the inner walls of both the intake end and the outlet end. The sixth elastic part is, for example, a spring. The cross-section of the conduction seat 323 is L-shaped, and a guiding flow channel is provided in the conduction seat 323. The cross-section of the guiding flow channel is also L-shaped. The conduction seat 323 is connected to the third movable plate 319 through a second pull rope 321;

[0098] When the third movable plate 319 is driven to move by the gas, the second pull rope 321 pulls the conduction seat 323 to move to a preset position, so that the guiding flow channel, the air outlet hole 320 and the channel 303 are communicated. When the third movable plate 319 moves back to its original position, the conduction seat 323 is driven to reset by the sixth elastic part, so that the channel 303, the intake end, the outlet end and the first connecting pipe 306 are communicated;

[0099] When the solenoid valve in the first branch pipe 307 is not opened, the channel 303, the air inlet end, the air outlet end and the first connecting pipeline 306 are in a communicating state, and gas cannot enter the air outlet hole 320. When it is necessary to disassemble the connection cable assembly 300 from the ground contact, the solenoid valve in the first branch pipe 307 can be opened, the solenoid valve in the second branch pipe 308 can be closed, and then the gas supply device can be turned on. The gas supply device supplies gas into the first branch pipe 307, and the gas enters the movable cavity 318 to drive the third movable plate 319 to move upward. The third movable plate 319 pulls the conduction seat 323 in the air inlet end and the air outlet end upward through the second pull rope 321. When the conduction seat 323 moves upward to a preset position, the guiding flow channel, the air outlet hole 320 and the channel 303 are communicated. At this time, under the action of the first elastic member and the elastic guiding member 311, the first movable plate 309 and the second movable plate are reset, and the air in the groove enters the channel 303 and is then discharged through the guiding flow channel and the air outlet hole 320. The gas discharged from the air outlet hole 320 impacts the ground contact, and the insert is reset and retracted into the groove by using the reaction force, the first elastic member and the elastic guiding member 311. At this time, the connection cable assembly 300 can be recycled.

[0100] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A system for analyzing the characteristics of soil carbon flux in forest and grassland, characterized in that, Comprising: Remote monitoring terminal; A plurality of acquisition modules (200) for acquiring forest and grassland soil carbon flux data; A mainframe mechanism (100) connected to an acquisition module (200) through a connection cable assembly (300), for receiving the acquired forest and grassland soil carbon flux data and performing analysis to obtain an analysis result, and the mainframe mechanism (100) is also wirelessly connected to the remote monitoring terminal; Wherein, the connection cable assembly (300) includes: A cable main body (301) with a protective sleeve (302) sleeved outside it, and both ends of the protective sleeve (302) are respectively connected to the acquisition module (200) and the mainframe mechanism (100); A plurality of groups of fixing members are arranged between the cable main body (301) and the protective sleeve (302), and an elastic filler (305) is filled at the position between adjacent fixing members. Each of the plurality of groups of fixing members is connected to a gas supply member, and the gas supply member is used to drive the fixing members to work so that the protective sleeve (302) is fixed in contact with the ground.

2. The analysis system according to claim 1, characterized in that: The mainframe mechanism (100) includes a mainframe box, and an analysis module, a controller, a photovoltaic power supply device and a wireless communication device arranged in the mainframe box.

3. The analysis system according to claim 1, wherein: The acquisition module (200) includes: A mounting plate (201) with a hollow-bottomed partition cylinder (203) threadedly inserted thereon, and insertion feet (202) for inserting and contacting the ground are arranged at the bottom of the mounting plate (201); A detection sensor (204) whose detection end is inside the partition cylinder (203) for acquiring forest and grassland soil carbon flux data, and the detection sensor (204) is connected to one end of the cable main body (301).

4. The analysis system according to claim 1, characterized in that: The fixing member includes: An annular bearing seat (304) with a groove opened at the bottom, and a positioning portion driven by the gas supply member to insert and contact the ground is slidably arranged in the groove; A reset portion is arranged in a movable cavity (318) opened in the annular bearing seat (304), and is driven by the gas supply member to work, thereby driving the positioning portion to reset.

5. The analysis system according to claim 4, wherein: The positioning portion includes: A movable plate one (309) movably arranged in the groove, an insertion block (310) is arranged at the bottom of the movable plate one (309), and the insertion block (310) moves through a through hole opened at the bottom of the protective sleeve (302) along with the movable plate one (309) to insert and contact the ground; An elastic guiding member (311) is arranged in the groove and connected to the movable plate one (309) for driving the movable plate one (309) to reset when the reset portion works.

6. The analysis system according to claim 5, characterized in that: An assembly groove is formed on the movable plate one (309) and the insertion block (310) in common. A movable plate two (312) driven by a gas supply member is slidably arranged in the assembly groove. The movable plate two (312) is connected with a trapezoidal block (313). The trapezoidal block (313) is connected with the bottom of the assembly groove through an elastic member one. A plurality of groups of horizontal insertion rods (314) are inserted into the side wall of the insertion block (310). An elastic member two is arranged at the connection of the horizontal insertion rod (314) and the insertion block (310). One end of the horizontal insertion rod (314) is slidably connected with the trapezoidal block (313), and the other end thereof is driven by the trapezoidal block (313) to move outwards and extend to the outside of the insertion block (310) when the trapezoidal block (313) moves downwards.

7. The analysis system according to claim 6, wherein: An extension groove one is formed on the inner wall of the assembly groove, and a magnetic block (315) capable of magnetically adsorbing the movable plate two (312) is movably arranged in the extension groove one. The magnetic block (315) is connected with the inner wall of the extension groove one through an elastic member three. An extension groove two is formed at the bottom of the movable plate one (309). A moving block is slidably arranged in the extension groove two. The moving block is connected with the inner wall of the extension groove two through an elastic member four. The moving block is connected with the magnetic block (315) through a pull rope one (316). The moving block is pushed upwards by a push rod (317). When it moves upwards, the magnetic block (315) is pulled through the pull rope one (316) to be separated from the movable plate two (312), so that the movable plate two (312) can move downwards under the drive of the gas supply member. The push rod (317) is arranged on the bottom wall of the protective sleeve (302) and is located in the groove.

8. The analysis system according to claim 4, wherein: The gas supply member includes: A channel (303) is formed in the annular bearing seat (304) and is communicated with the groove. An air inlet end and an air outlet end which are communicated with each other are respectively arranged at both ends of the channel (303); A connecting pipeline one (306) is arranged between two adjacent annular bearing seats (304) and communicates the air inlet end and the air outlet end in two adjacent channels (303); The air inlet end of the channel (303) closest to the host mechanism (100) is communicated with a branch pipe two (308). One end of the branch pipe two (308) penetrates through the outer wall of the protective sleeve (302) and is communicated with the output end of a gas supply device arranged in the host mechanism (100). An electromagnetic valve is arranged on the branch pipe two (308). The air outlet end of the channel (303) closest to the acquisition module (200) is closed; A branch pipe one (307) is further included. The branch pipe one (307) communicates with the movable cavity (318). One end of the branch pipe one (307) penetrates through the outer wall of the protective sleeve (302) and is detachably communicated with the output end of the gas supply device. An electromagnetic valve is arranged in the branch pipe one (307).

9. The analysis system according to claim 8, wherein: The reset part includes: A movable plate three (319) is driven to move by the gas introduced into the movable cavity (318) by the gas supply member. The movable plate three (319) is connected with one side inner wall of the movable cavity (318) through an elastic member five; Two groups of air outlets (320) are respectively opened inside the annular bearing seat (304) and on both sides of the groove. One ends of the two groups of air outlets (320) are respectively communicated with the air inlet end and the air outlet end, and the other ends penetrate through the bottom of the protective sleeve (302). A conduction seat (323) is movably arranged inside both the air inlet end and the air outlet end, and a sixth elastic member for connecting the conduction seat (323) is arranged on the inner walls of the air inlet end and the air outlet end. A guiding flow channel is arranged inside the conduction seat (323). The conduction seat (323) is connected to the movable plate three (319) through a second pulling rope (321). When the movable plate three (319) is driven by gas to move, the second pulling rope (321) pulls the conduction seat (323) to move to a preset position, so that the guiding flow channel, the air outlet (320) and the channel (303) are communicated. When the movable plate three (319) moves back to its original position, the conduction seat (323) is driven by the sixth elastic member to reset, so that the channel (303), the air inlet end, the air outlet end and the first connecting pipeline (306) are communicated.

10. A method for analyzing the change characteristics of soil carbon flux in forest and grassland, using the analysis system according to any one of claims 1-9, characterized in that: Including the following steps: S1: Install several acquisition modules (200) in the forest and grassland areas to be monitored respectively, connect the acquisition modules (200) to the host mechanism (100) through the connection cable assembly (300), send a control signal to the host mechanism (100) through the remote monitoring terminal, and the host mechanism (100) enables several acquisition modules (200) to work through the connection cable assembly (300); wherein, after connecting the acquisition modules (200) to the host mechanism (100) through the connection cable assembly (300), lay the cable body (301) on the ground in contact, and then control the air supply member to drive the fixing member to work, so that the protective sleeve (302) is fixed to the ground in contact; S2: The acquisition module (200) acquires the forest and grassland soil carbon flux data in a preset time period, sends the acquired forest and grassland soil carbon flux data to the host mechanism (100) through the connection cable assembly (300), analyzes it through the host mechanism (100) to obtain an analysis result, and sends the analysis result to the remote monitoring terminal.

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