Layered sampling device for indoor earth culture experiment

Abstract

The invention discloses an indoor soil culture experiment stratified sampling device, and relates to the field of agricultural soil culture devices.The indoor soil culture experiment stratified sampling device comprises a foundation pot and separation pots, the top of the foundation pot is detachably connected with the multiple separation pots, the interiors of the foundation pot and the separation pots are used for being filled with soil, and separation blade assemblies and probes are arranged in the separation pots; the partition blade assembly moves to realize communication or closing between the adjacent partition basins and between the partition basins and the basic basin; and the probe can radially stretch out and draw back in the soil body so as to collect the soil parameters of the target soil layer in situ in real time one by one. Under the condition that other soil layers are not damaged, sampling operation such as soil sampling or monitoring can be conducted on a certain soil layer independently, vertical disturbance of soil layering is avoided, the integrity of the soil structure is ensured, and meanwhile it is not needed to arrange multiple sets of repetitions due to destructive sampling.

Description

Technical Field

[0001] The invention relates to the field of agricultural soil cultivation devices, in particular to a stratified sampling device for indoor soil cultivation experiments. Background Art

[0002] The soil environment plays a vital role in plant growth, microbial activity, and the survival of soil animals. Soil cultivation experiments (abbreviated as soil cultivation experiments) are an important means of studying changes in the soil environment. Indoor soil cultivation experiments have excellent environmental factor constraints. By controlling variables such as the amount of soil improvement additives, inorganic fertilizers, organic fertilizers, organic materials, and microbial agents added or the application of technical models, the impact of experimental variables can be studied. Soil experiments with higher precision all need to be operated and studied through indoor soil cultivation experiments. After obtaining empirical conclusions, they are further put into practice in field experiments. Indoor soil cultivation experiments usually require obtaining samples in different time periods and spaces, and analyzing various indicators.

[0003] The existing technology has the following problems: (1) When sampling in the container of the soil culture experiment, it is generally necessary to dig out the experimental materials in layers and then backfill the soil. However, this operation is very likely to cause the soil layers to be disturbed up and down, which greatly damages the soil structure and leads to inaccurate data; (2) The excavated soil layer consumes a long time and is exposed to the air for a long time. After backfilling, the water content distribution of each soil layer changes, which interferes with the soil water environment and microbial activity; (3) In order to avoid destructive sampling, traditional soil culture experiments often require multiple replicates for each treatment, which significantly increases the cost and time of the experiment, and ignores the independent effect of soil heterogeneity on the treatment effect.

[0004] Therefore, how to develop a stratified sampling device for indoor soil culture experiments that can sample a certain soil layer separately without destroying other soil layers, avoid the up and down disturbance of soil stratification, ensure the integrity of soil structure, and at the same time, do not need to set up multiple sets of repetitions due to destructive sampling, has become a technical problem that needs to be solved urgently by people in this field. Summary of the Invention

[0005] The purpose of the present invention is to provide a stratified sampling device for indoor soil culture experiments, which can perform sampling operations on a certain soil layer alone without destroying other soil layers, avoiding the up and down disturbance of soil stratification and ensuring the integrity of the soil structure. At the same time, there is no need to set up multiple groups of repetitions due to destructive sampling.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention provides a stratified sampling device for indoor soil culture experiments, comprising a base basin and a partition basin. The top of the base basin is detachably connected to a plurality of partition basins. The interiors of the base basin and the partition basins are used for filling soil. A partition blade assembly is provided in the partition basin. By moving the partition blade assembly, communication or closure between adjacent partition basins and between the partition basin and the base basin can be achieved.

[0008] Preferably, the partition basin includes a lower tray, the lower tray includes a first annular disk body, a trapezoidal groove and an L-shaped block, the upper surface of the first annular disk body is provided with a plurality of trapezoidal grooves along the circumferential direction, the extension direction of the trapezoidal groove is perpendicular to the radius of the first annular disk body, one end of the trapezoidal groove is close to the inner edge of the first annular disk body, and the other end of the trapezoidal groove is close to the outer edge of the first annular disk body;

[0009] A plurality of L-shaped blocks are evenly arranged along the circumferential direction on the upper surface of the first circular disk body, and the bent short sides of the L-shaped blocks are fixedly connected to the upper surface of the first circular disk body. The L-shaped blocks and the upper surface of the first circular disk body together form a U-shaped groove, and the open end of the U-shaped groove faces the outer edge of the first circular disk body.

[0010] Preferably, the separator blade assembly comprises a plurality of wedge-shaped separator blades, the outer edges of the plurality of separator blades on both sides of which are closely butted against each other, and the tips thereof are aligned;

[0011] A rounded rectangular groove is formed on the upper surface of the separating blade, the rounded rectangular groove is located away from the tip of the separating blade, and a plurality of the rounded rectangular grooves are arranged along the same circumferential direction;

[0012] A trapezoidal block is fixedly provided on the lower surface of the separating blade. Multiple trapezoidal blocks are arranged along the same circumferential direction and are slidably adapted to the multiple trapezoidal grooves of the lower tray. The shape and size of the trapezoidal blocks are adapted to the trapezoidal grooves to limit the sliding direction of the separating blade.

[0013] Preferably, the separation basin also includes a rotating disk, which includes a second annular disk body, and the lower surface of the second annular disk body is evenly provided with multiple cylindrical bosses along the circumferential direction. The multiple cylindrical bosses are respectively slidably embedded in multiple rounded rectangular grooves on the upper surface of the separating blade. The shape and size of the cylindrical bosses are adapted to the rounded rectangular grooves to drive the separating blade to move when the rotating disk rotates.

[0014] Preferably, the lower surface of the second annular disk body is provided with a plurality of arc grooves, the number and position of the arc grooves correspond to the plurality of L-shaped blocks of the lower tray, and each of the arc grooves is provided with a long groove on the side wall near the outer edge of the second annular disk body, and the long side of the L-shaped block of the lower tray is slidably embedded in the arc groove, and the long side end of the L-shaped block can be slidably inserted in the long groove to limit the rotation angle range of the rotating disk relative to the lower tray.

[0015] Preferably, the partition basin also includes a handle, and a rectangular groove is opened on one side of the handle, and the rectangular groove covers the upper surface edge of the rotating disk and the lower surface edge of the lower tray. The side wall of the rectangular groove is fixedly connected to the upper surface edge of the rotating disk, and the lower end surface of the rectangular groove is slidably abutted against the lower surface edge of the lower tray, so that operating the handle can drive the rotating disk to rotate relative to the lower tray.

[0016] Preferably, a limit ring is provided on the inner ring of the upper surface of the second annular disk body, and a first annular groove is provided on the top of the limit ring. Two placement grooves are symmetrically provided on the upper surface of the second annular disk body, and the power supply and controller component and the information transmission component are fixedly installed in the two placement grooves respectively, and the information transmission component is electrically connected to the power supply and controller component.

[0017] Preferably, the partition basin further comprises a basin wall, and the top and bottom of the basin wall are both provided with a first annular protrusion; the inner ring of the lower surface of the lower tray is fixedly connected to a connecting ring, and the bottom of the connecting ring is provided with a second annular groove, the first annular protrusion on the top of the basin wall matches the second annular groove on the bottom of the connecting ring, and the first annular protrusion on the bottom of the basin wall matches the first annular groove on the top of the limiting ring;

[0018] A second annular protrusion is provided on the top of the base basin, and the second annular protrusion cooperates with the second annular groove at the bottom of the connecting ring to achieve the connection between the base basin and the separation basin;

[0019] The inner wall of the basin wall is symmetrically provided with limiting grooves.

[0020] Preferably, a probe is fixedly embedded in the limit groove, and the probe includes an outer tube, an inner tube, an arc-shaped tile, a limit block, a limit hole, a gear, a mounting plate, a rack and a driving motor, the interior of the outer tube is arranged into a cylindrical slide groove structure with openings at both ends, the tail end of the cylindrical slide groove is provided with a coaxially arranged square column mounting groove, the inner tube can be slidably embedded in the cylindrical slide groove, the tail end of the inner tube is provided with a horizontally penetrating limit hole, the two arc-shaped tiles are buckled and wrapped and connected to the outer wall of the tail end of the inner tube, and a limit block matching the limit hole is provided on the inner concave surface of the arc-shaped tile, the interior of the limit block is arranged into a cavity structure with an opening at one end, the arc-shaped tile is provided with a through hole communicating with the inner cavity of the limit block, and the driving motor is embedded and mounted on The gear is fixedly connected to the power output end of the drive motor, and the two mounting plates are symmetrically arranged on the two side walls of the square columnar mounting groove, and the upper and lower ends of each mounting plate are symmetrically provided with the racks along the long side direction, and the racks are meshed with the gears. The front end of the inner tube is provided with a pressure sensor, a soil moisture sensor, a soil temperature sensor, a soil conductivity sensor and a soil pH sensor, and the pressure sensor, the soil moisture sensor, the soil temperature sensor, the soil conductivity sensor, the soil pH sensor and the drive motor are all electrically connected to the power supply and controller assembly.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects:

[0022] 1) The present invention precisely controls the connection / closure status between adjacent partition basins and between the partition basin and the base basin by moving the partition blade assembly. During sampling, closing the blade of the target soil layer achieves non-destructive isolation, completely preventing inter-layer soil mixing and completely preserving the original structure of the upper and lower soil layers. This fundamentally eliminates the soil disturbance problem caused by traditional excavation, ensures the integrity of the soil structure, and thus improves the accuracy and reliability of experimental data. At the same time, it overcomes the problem of traditional soil cultivation experiments requiring multiple sets of repetitions due to destructive sampling, thereby improving the operability and convenience of experimental design.

[0023] 2) An annular bump-groove coupling structure is used between the base basin and the partition basin to achieve rapid assembly and disassembly and free expansion of the number of layers. This allows experimenters to flexibly adjust the height and number of layers of the soil cultivation device according to experimental requirements, improves the efficiency of experimental operations, and significantly enhances the efficiency of experimental device construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1This is a schematic diagram of the overall structure of a stratified sampling device for indoor soil culture experiments according to the present invention;

[0026] Figure 2 This is a schematic diagram of the explosion structure of a stratified sampling device for indoor soil culture experiments according to the present invention;

[0027] Figure 3 The structure of the lower tray of the present invention is shown as follows Figure 1 ;

[0028] Figure 4 The structure of the lower tray of the present invention is shown as follows Figure 2 ;

[0029] Figure 5 The structure of the rotating disk of the present invention is shown as follows Figure 1 ;

[0030] Figure 6 The structure of the rotating disk of the present invention is shown as follows Figure 2 ;

[0031] Figure 7 It is a cross-sectional view of the structure of the rotating disk of the present invention;

[0032] Figure 8 For the present invention Figure 7 A partial enlarged view of point A in the middle;

[0033] Figure 9 The structure of the separating blade assembly of the present invention is shown as follows Figure 1 ;

[0034] Figure 10 The structure of the separating blade assembly of the present invention is shown as follows Figure 2 ;

[0035] Figure 11 It is a structural schematic diagram of the basin wall of the present invention;

[0036] Figure 12 The structure of the partition basin of the present invention is shown as follows Figure 1 ;

[0037] Figure 13 For the present invention Figure 12 A partial enlarged view of point B in the middle;

[0038] Figure 14 Schematic diagram of the structure of the probe of the present invention;

[0039] Figure 15 Schematic diagram of the internal structure of the probe of the present invention;

[0040] Figure 16 This is a schematic diagram of the connection structure between the mounting plate and the rack of the present invention;

[0041] Figure 17The structure of the partition basin of the present invention is shown as follows Figure 2 ;

[0042] Figure 18 The structure of the partition basin of the present invention is shown as follows Figure 3 ;

[0043] Figure 19 The structure of the partition basin of the present invention is shown as follows Figure 4 .

[0044] Explanation of reference numerals: 1. base basin; 2. partition basin; 3. lower tray; 301. first annular plate; 302. trapezoidal groove; 303. L-shaped block; 4. rotating plate; 401. second annular plate; 402. cylindrical boss; 403. arc groove; 404. long groove; 405. placement groove; 406. limiting ring; 4061. first annular groove; 5. handle; 501. rectangular groove; 6. partition blade assembly; 601. Separator blade; 602, trapezoidal block; 603, rounded rectangular groove; 7, probe; 701, outer tube; 702, inner tube; 703, curved tile; 704, limit block; 705, limit hole; 706, gear; 707, mounting plate; 708, rack; 8, basin wall; 801, first annular protrusion; 802, limit groove; 9, connecting ring; 901, second annular groove; 10, power supply and controller assembly; 11, information transmission assembly. DETAILED DESCRIPTION

[0045] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0046] like Figure 1-19 As shown, a stratified sampling device for indoor soil culture experiments includes a base basin 1 and a partition basin 2. The top of the base basin 1 is detachably connected to multiple partition basins 2. The interiors of the base basin 1 and the partition basins 2 are used to fill soil. A partition blade assembly 6 is provided in the partition basin 2. By moving the partition blade assembly 6, communication or closure between adjacent partition basins 2 and between the partition basin 2 and the base basin 1 can be achieved.

[0047] Specifically, the number of the partition basins 2 is set to at least one, and the top of the base basin 1 is detachably connected to the partition basin 2, and the top of the partition basin 2 is detachably connected to another partition basin 2. The detachable assembly and connection of multiple partition basins 2 can simplify the stratified sampling process, reduce damage and disturbance to the soil layers in the container, and facilitate the user to study the sampling of the middle soil layer while maintaining the upper and lower soil layers in their original state. The degree of damage to the soil structure is minimal, and the accuracy of the measurement data can be effectively achieved.

[0048] Specifically, the bottom of the base basin 1 is provided with small holes that are permeable to water and air.

[0049] Specifically, the partition basin 2 includes a lower tray 3, which includes a first annular disk body 301, a trapezoidal groove 302 and an L-shaped block 303. The upper surface of the first annular disk body 301 is provided with a plurality of trapezoidal grooves 302 along the circumferential direction. The extension direction of the trapezoidal groove 302 is perpendicular to the radius of the first annular disk body 301. One end of the trapezoidal groove 302 is close to the inner edge of the first annular disk body 301, and the other end of the trapezoidal groove 302 is close to the outer edge of the first annular disk body 301.

[0050] A plurality of L-shaped blocks 303 are evenly arranged on the upper surface of the first circular disk 301 along the circumferential direction, and the bent short sides of the L-shaped blocks 303 are fixedly connected to the upper surface of the first circular disk 301. The L-shaped blocks 303 and the upper surface of the first circular disk 301 together form a U-shaped groove, and the open end of the U-shaped groove faces the outer edge of the first circular disk 301.

[0051] Specifically, the separator blade assembly 6 includes a plurality of wedge-shaped separator blades 601, the outer edges of the plurality of separator blades 601 on both sides are closely butted against each other, and the tips thereof are aligned;

[0052] A rounded rectangular groove 603 is formed on the upper surface of the separating blade 601. The rounded rectangular groove 603 is located away from the tip of the separating blade 601, and a plurality of the rounded rectangular grooves 603 are arranged along the same circumferential direction.

[0053] A trapezoidal block 602 is fixedly provided on the lower surface of the separating blade 601. Multiple trapezoidal blocks 602 are arranged along the same circumferential direction and can be slidably adapted in multiple trapezoidal grooves 302 of the lower tray 3. The shape and size of the trapezoidal blocks 602 are adapted to the trapezoidal grooves 302 to limit the sliding direction of the separating blade 601.

[0054] Specifically, the separation basin 2 also includes a rotating disk 4, which includes a second annular disk body 401. The lower surface of the second annular disk body 401 is evenly provided with multiple cylindrical bosses 402 along the circumferential direction. The multiple cylindrical bosses 402 are respectively slidably embedded in multiple rounded rectangular grooves 603 on the upper surface of the separating blade 601. The shape and size of the cylindrical bosses 402 are adapted to the rounded rectangular grooves 603 to drive the separating blade 601 to move when the rotating disk 4 rotates.

[0055] Specifically, a plurality of arc grooves 403 are provided on the lower surface of the second annular disk body 401, and the number and position of the arc grooves 403 correspond to the plurality of L-shaped blocks 303 of the lower tray 3. A long groove 404 is provided on the side wall of each arc groove 403 near the outer edge of the second annular disk body 401, and the long side of the L-shaped block 303 of the lower tray 3 is slidably embedded in the arc groove 403, and the long side end of the L-shaped block 303 can be slidably inserted in the long groove 404 to limit the rotation angle range of the rotating disk 4 relative to the lower tray 3.

[0056] Specifically, the partition basin 2 also includes a handle 5, and a rectangular groove 501 is opened on one side of the handle 5, and the rectangular groove 501 covers the upper surface edge of the rotating disk 4 and the lower surface edge of the lower tray 3. The side wall of the rectangular groove 501 is fixedly connected to the upper surface edge of the rotating disk 4, and the lower end face of the rectangular groove 501 is slidably abutted against the lower surface edge of the lower tray 3, so that operating the handle 5 can drive the rotating disk 4 to rotate relative to the lower tray 3.

[0057] Specifically, the user rotates the rotating disk 4 in the forward direction by operating the handle 5. The rotating movement of the rotating disk 4 drives the multiple separating blades 601 to move synchronously through the sliding cooperation between the cylindrical boss 402 on its lower surface and the rounded rectangular groove 603 on the upper surface of the separating blade 601. During this process, the trapezoidal block 602 on the lower surface of each separating blade 601 slides along the corresponding trapezoidal groove 302 set on the lower tray 3. Due to the directional constraint of the trapezoidal groove 302, the tip parts of the multiple separating blades 601, that is, the thinner ends, are forced to move synchronously outward away from the center of the device. When the tips of all the separating blades 601 move outward to the maximum stroke, gaps are formed between their originally tightly connected outer edges, thereby penetrating the soil space between adjacent separating basins 2 and between the bottom separating basin 2 and the base basin 1, thereby realizing the connectivity of each layer of soil.

[0058] When it is necessary to seal each layer of soil, the user operates the handle 5 in reverse to drive the rotating disk 4 to rotate in the opposite direction, and its cylindrical boss 402 drives the separating blade 601 to move again through the rounded rectangular groove 603. At this time, the trapezoidal block 602 of each separating blade 601 slides in the opposite direction along the trapezoidal groove 302, driving the tip of the separating blade 601 to move synchronously toward the center of the device. When the tips of all the separating blades 601 move to the center position and are realigned tightly, their outer edges re-form a continuous closed surface, effectively isolating and sealing the soil space between adjacent separating basins 2 and between the separating basin 2 and the base basin 1.

[0059] Specifically, a limit ring 406 is provided on the inner ring of the upper surface of the second annular disk 401, and a first annular groove 4061 is provided on the top of the limit ring 406. Two placement grooves 405 are symmetrically provided on the upper surface of the second annular disk 401, and the power supply and controller component 10 and the information transmission component 11 are fixedly installed in the two placement grooves 405 respectively, and the information transmission component 11 is electrically connected to the power supply and controller component 10.

[0060] Specifically, the partition basin 2 further includes a basin wall 8, and the top and bottom of the basin wall 8 are both provided with a first annular protrusion 801; the inner ring of the lower surface of the lower tray 3 is fixedly connected to a connecting ring 9, and the bottom of the connecting ring 9 is provided with a second annular groove 901, and the first annular protrusion 801 on the top of the basin wall 8 matches the second annular groove 901 at the bottom of the connecting ring 9, and the first annular protrusion 801 at the bottom of the basin wall 8 matches the first annular groove 4061 at the top of the limiting ring 406;

[0061] A second annular protrusion is provided on the top of the base basin 1, and the second annular protrusion cooperates with the second annular groove 901 at the bottom of the connecting ring 9 to achieve the connection between the base basin 1 and the separation basin 2;

[0062] The inner wall of the basin wall 8 is symmetrically provided with limiting grooves 802 .

[0063] Specifically, the limiting groove 802 is fixedly embedded with a probe 7, and the probe 7 includes an outer tube 701, an inner tube 702, an arc-shaped tile 703, a limiting block 704, a limiting hole 705, a gear 706, a mounting plate 707, a rack 708 and a driving motor. The interior of the outer tube 701 is configured as a cylindrical chute structure with two ends open, and the tail end of the cylindrical chute is provided with a coaxially arranged square columnar mounting groove, and the inner tube 702 is slidably embedded in In the cylindrical chute, a horizontally penetrating limiting hole 705 is provided at the tail end of the inner tube 702, and the two arc-shaped tiles 703 are buckled and wrapped and connected to the outer wall of the tail end of the inner tube 702, and a limiting block 704 matching the limiting hole 705 is provided on the inner concave surface of the arc-shaped tile 703. The interior of the limiting block 704 is set as a cavity structure with one end open, and the arc-shaped tile 703 is provided with a cavity matching the inner cavity of the limiting block 704. The through hole is connected to the arc tile 703, and the drive motor is embedded in the inner cavity of the limit block 704, and the power output end of the drive motor is exposed on the outer convex surface of the arc tile 703 after passing through the through hole on the arc tile 703. The gear 706 is fixedly connected to the power output end of the drive motor, and the two mounting plates 707 are symmetrically arranged on the two side walls of the square columnar mounting groove, and the upper and lower ends of each mounting plate 707 are symmetrically provided with the rack 708 along the long side direction, and the rack 708 is meshed with the gear 706. The front end of the inner tube 702 is provided with a pressure sensor, a soil moisture sensor, a soil temperature sensor, a soil conductivity sensor and a soil pH sensor, and the pressure sensor, soil moisture sensor, soil temperature sensor, soil conductivity sensor, soil pH sensor and the drive motor are all electrically connected to the power supply and controller component 10.

[0064] Specifically, the power supply and controller component 10 and the information transmission component 11 provide working power for the probe 7 and manage its data acquisition and communication functions. When the power switch of the power supply and controller component 10 is turned on, the indicator light is on (always on), and the system starts. At this time, the nested structure of the probe 7, its inner tube 702 can be slidably embedded in the outer tube 701, and the front end of the inner tube 702 is integrated with a pressure sensor, a soil moisture sensor, a soil temperature sensor, a soil conductivity sensor and a soil pH sensor, which can continuously or at preset intervals collect soil parameters at the basin wall.

[0065] Specifically, after turning on the power switch, the probe 7 is in the initial state by default. At this time, the sensors integrated at the front end of the inner tube 702 (including a pressure sensor, a soil moisture sensor, a soil temperature sensor, a soil conductivity sensor and a soil pH sensor) are used to monitor the soil at the position corresponding to the top of the outer tube 701. Usually, the length of the outer tube 701 is designed to be the radius of the basin wall 8. After installation, the top of the outer tube 701 is located at a radius position of one-third of the circumference of the basin wall 8. The sensor monitors the soil parameters at this position; when it is necessary to monitor the soil in the center of the basin, short press the control button of the power and controller component 10, the indicator light starts to flash, and the controller sends a command to the drive motor embedded in the inner cavity of the limit block 704. The drive motor will drive the gear 706 to rotate clockwise or counterclockwise, and the rotating gear 70 Due to the meshing with the fixed rack 708, the curved tile 703 generates a linear displacement force along the length of the rack 708, which in turn drives the inner tube 702 to slide along the cylindrical chute inside the outer tube 701 toward the center of the basin. If it successfully advances to the preset position, the indicator light returns to normal, and data collection for the central soil area begins. If, during the advancement process, the pressure sensor at the front end of the inner tube 702 detects an abnormal increase in soil resistance (such as encountering stones or hard samples), the controller will immediately stop the drive motor, pausing the advancement. At the same time, the indicator light will flash rapidly to alert the user to the presence of resistance. To attempt to ignore the resistance and force advancement to the preset point, press and hold the control button for at least 3 seconds. The controller will then instruct the drive motor to attempt to increase torque to force advancement. The multiple probe inner tubes 702 in the basin wall 8 are controlled by the power supply and controller assembly 10 and extend and retract synchronously.

[0066] Specifically, in order to intuitively display the detection position of the front end of the probe inner tube 702 (i.e., the sensor end) in the basin, the present invention adds a display light bar consisting of five LED indicators on the housing of the power supply and controller assembly 10. When the top of the inner tube 702 is at the starting position (at a radius of one-tenth of the circumference of the basin wall), only one LED indicator is lit in the display light bar;

[0067] Driven by the driving motor, the inner tube 702 moves in sections from the starting position toward the center of the basin four times. Every time it successfully extends a preset distance, the number of LED indicators that light up on the display light bar increases by one. Similarly, when the inner tube 702 retreats a preset distance, the number of LED indicators that light up decreases by one. When the front end of the inner tube 702 finally reaches the center of the basin, all five LED indicators on the display light bar will light up. By observing the number of lit LED indicators on the light bar, the user can intuitively determine at which radial position in the basin the soil parameters are being detected by the sensor integrated in the front end of the inner tube 702.

[0068] Specifically, the storage submodule of the information transmission component 11 automatically stores sensor data according to a preset period (such as every 2 hours). After turning on the switch of its wireless communication submodule (such as Bluetooth), the indicator light is always on to indicate that it is connectable. The indicator light flashes during data transmission and returns to normal after completion.

[0069] The use process of the present invention is as follows:

[0070] S1. Prepare soil samples for the soil culture experiment. Calculate the total soil mass required based on the designed soil capacity requirements. Calculate the soil mass required for each layer based on the volume of the base pot 1 and the pot walls 8 of each partition pot 2. Sieve the soil samples.

[0071] S2. Load the calculated bottom layer of soil into the base basin 1, then take the first separator basin 2, align and connect the second annular groove 901 at the bottom of its connecting ring 9 with the second annular protrusion on the top of the base basin 1, rotate the handles 5 on both sides of the rotating disk 4 of the separator basin 2, drive the separator blade assembly 6 to completely close, and fill the basin wall 8 of the separator basin 2 with the corresponding calculated layer of soil; then, take the next separator basin 2, align and connect the second annular groove 901 at the bottom of its connecting ring 9 with the first annular protrusion 801 on the top of the basin wall 8 of the installed separator basin 2, repeat the above steps of rotating the handle 5 to close the separator blade, fill the soil, and connect the upper separator basin until the required number of separator basins 2 are installed;

[0072] S3. If experimental treatment is required for a soil layer at a specific depth (e.g., adding substances, embedding samples, etc.), perform the corresponding operation in the space between the wall 8 of the partition basin 2 after filling the soil layer and before installing the upper partition basin 2.

[0073] S4. After all the partition basins 2 are installed, label each partition basin, turn on the information transmission component 11 of each partition basin 2, and sort and name the data collected. Then, rotate the handles 5 of each partition basin 2 from bottom to top, driving the partition blade components 6 of each layer to fully open. At this time, the soil in each partition basin 2 and the base basin 1 is connected up and down through the opened gap to form a complete soil body. Then, cover the top of the basin wall 8 of the topmost partition basin 2 with a layer of plastic wrap, and evenly poke small holes in the plastic wrap to slow down the evaporation of water vapor. After completing the above operations, it marks the official start of the indoor soil culture experiment;

[0074] S5. For the soil layer that needs to be monitored in real time (corresponding to the partition basin), turn on the power switch of its power supply and controller assembly 10. At this time, the top front end of the inner tube 702 of the probe 7 (i.e., the sensor end) starts to work and continuously monitors the soil parameters near the starting position (a radius of one-tenth of the circumference of the basin wall 8). If the soil in the central area of ​​the basin needs to be monitored, short press the control button of the partition basin power supply and controller assembly 10 (the indicator light turns to flashing), and the controller will drive the inner tubes 702 of all the partition basin probes 7 to advance toward the center of the basin. Every time a preset distance is successfully extended, the number of LED indicators lit on the display light bar increases by one. After successfully advancing to the center of the basin, the indicator light returns to normal, and all five LED indicators on the display light bar will light up, starting the data collection operation for the central area;

[0075] S6. After the scheduled sampling time is reached, the handles 5 of each partition basin 2 are rotated from top to bottom in turn to drive the partition blade assemblies 6 of each layer to close completely, isolate each layer of soil, and remove the top partition basin 2 and place it aside. In this way, the partition basins 2 above the soil layer to be sampled are removed in order from top to bottom, and soil samples are collected from the target experimental treatment soil layer (exposed partition basin); if the sampling process takes a long time, the top of the basin wall 8 of the removed partition basin 2 can be covered with plastic wrap (and holes are poked) to reduce soil moisture evaporation; after the sample collection is completed, the upper partition basin 2 that has been removed is reinstalled from bottom to top according to the method described in step 4, and the handle 5 is rotated to open its partition blade assembly 6 to restore the soil connectivity so that subsequent soil cultivation experiments can continue; if irrigation or application of water-soluble fertilizers for a specific time is required, the plastic wrap of the top partition basin 2 is removed, and the plastic wrap is covered again (and holes are poked) after irrigation or application of water-soluble fertilizers.

[0076] S7. After the experiment is over, turn on the wireless communication submodule switch of the information transmission component 11 of each partition basin 2, connect the signals of each partition basin, and the indicator light will flash during the wireless transmission of the sensor data of each soil layer, and will return to normal light after the transmission is completed; then, rotate the handle 5 of each partition basin 2 from top to bottom, close all the partition blade components 6, and remove all the partition basins 2 in order from top to bottom, and pour out the soil in each partition basin 2 and the base basin 1, and clean up each layer of broken soil.

[0077] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0078] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A stratified sampling device for indoor soil culture experiments, characterized by: The invention comprises a base basin (1) and a partition basin (2), wherein a plurality of partition basins (2) are detachably connected to the top of the base basin (1), the interiors of the base basin (1) and the partition basins (2) are used for filling soil, and a partition blade assembly (6) is provided in the partition basin (2), and communication or closure between adjacent partition basins (2) and between the partition basins (2) and the base basin (1) is achieved by moving the partition blade assembly (6).

2. A stratified sampling device for indoor soil culture experiments according to claim 1, characterized in that: The partition basin (2) comprises a lower tray (3), the lower tray (3) comprising a first annular disk body (301), a trapezoidal groove (302) and an L-shaped block (303), the upper surface of the first annular disk body (301) is provided with a plurality of trapezoidal grooves (302) along the circumferential direction, the extension direction of the trapezoidal grooves (302) is perpendicular to the radius of the first annular disk body (301), one end of the trapezoidal groove (302) is close to the inner edge of the first annular disk body (301), and the other end of the trapezoidal groove (302) is close to the outer edge of the first annular disk body (301); The upper surface of the first annular disk (301) is evenly provided with a plurality of L-shaped blocks (303) along the circumferential direction, the bent short sides of the L-shaped blocks (303) are fixedly connected to the upper surface of the first annular disk (301), and the L-shaped blocks (303) and the upper surface of the first annular disk (301) together form a U-shaped groove, and the open end of the U-shaped groove faces the outer edge of the first annular disk (301).

3. A stratified sampling device for indoor soil culture experiments according to claim 2, characterized in that: The separator blade assembly (6) comprises a plurality of wedge-shaped separator blades (601), the outer edges of the plurality of separator blades (601) on both sides are closely butted against each other, and the tips thereof are aligned; A rounded rectangular groove (603) is provided on the upper surface of the separating blade (601), the rounded rectangular groove (603) is located away from the tip of the separating blade (601), and a plurality of the rounded rectangular grooves (603) are arranged along the same circumferential direction; A trapezoidal block (602) is fixedly provided on the lower surface of the separating blade (601), and a plurality of the trapezoidal blocks (602) are arranged along the same circumferential direction and are respectively slidably adapted to fit within a plurality of trapezoidal grooves (302) of the lower tray (3). The shape and size of the trapezoidal blocks (602) are adapted to the trapezoidal grooves (302) to limit the sliding direction of the separating blade (601).

4. A stratified sampling device for indoor soil culture experiments according to claim 3, characterized in that: The separation basin (2) further comprises a rotating disk (4), the rotating disk (4) comprising a second annular disk body (401), the lower surface of the second annular disk body (401) being evenly provided with a plurality of cylindrical bosses (402) along the circumferential direction, the plurality of cylindrical bosses (402) being respectively slidably embedded in a plurality of rounded rectangular grooves (603) on the upper surface of the separation blade (601), the shape and size of the cylindrical bosses (402) being adapted to the rounded rectangular grooves (603) so as to drive the separation blade (601) to move when the rotating disk (4) rotates.

5. A stratified sampling device for indoor soil culture experiments according to claim 4, characterized in that: The lower surface of the second annular disk (401) is provided with a plurality of arc grooves (403), the number and position of the arc grooves (403) correspond to the plurality of L-shaped blocks (303) of the lower tray (3), and each of the arc grooves (403) is provided with a long groove (404) on the side wall close to the outer edge of the second annular disk (401), and the long side of the L-shaped block (303) of the lower tray (3) is slidably embedded in the arc groove (403), and the long side end of the L-shaped block (303) can be slidably inserted in the long groove (404) to limit the rotation angle range of the rotating disk (4) relative to the lower tray (3).

6. The stratified sampling device for indoor soil culture experiments according to claim 5, characterized in that: The partition basin (2) further comprises a handle (5), a rectangular groove (501) being provided on one side of the handle (5), the rectangular groove (501) covering the upper surface edge of the rotating disk (4) and the lower surface edge of the lower tray (3), the side wall of the rectangular groove (501) being fixedly connected to the upper surface edge of the rotating disk (4), and the lower end surface of the rectangular groove (501) being slidably abutted against the lower surface edge of the lower tray (3), so that operating the handle (5) can drive the rotating disk (4) to rotate relative to the lower tray (3).

7. The stratified sampling device for indoor soil culture experiments according to claim 4, characterized in that: A limit ring (406) is provided on the inner ring of the upper surface of the second annular disk (401), and a first annular groove (4061) is provided on the top of the limit ring (406). Two placement grooves (405) are symmetrically provided on the upper surface of the second annular disk (401), and a power supply and controller component (10) and an information transmission component (11) are fixedly installed in the two placement grooves (405), respectively, and the information transmission component (11) is electrically connected to the power supply and controller component (10).

8. The stratified sampling device for indoor soil culture experiments according to claim 7, characterized in that: The partition basin (2) further comprises a basin wall (8), and the top and bottom of the basin wall (8) are both provided with a first annular protrusion (801); the inner ring of the lower surface of the lower tray (3) is fixedly connected to a connecting ring (9), and the bottom of the connecting ring (9) is provided with a second annular groove (901), the first annular protrusion (801) on the top of the basin wall (8) matches the second annular groove (901) on the bottom of the connecting ring (9), and the first annular protrusion (801) on the bottom of the basin wall (8) matches the first annular groove (4061) on the top of the limiting ring (406); A second annular projection is provided on the top of the base basin (1), and the second annular projection cooperates with a second annular groove (901) at the bottom of the connecting ring (9) to achieve connection between the base basin (1) and the separating basin (2); The inner wall of the basin wall (8) is symmetrically provided with limiting grooves (802).

9. The stratified sampling device for indoor soil culture experiments according to claim 8, characterized in that: A probe (7) is fixedly embedded in the limiting groove (802), and the probe (7) comprises an outer tube (701), an inner tube (702), an arc-shaped tile (703), a limiting block (704), a limiting hole (705), a gear (706), a mounting plate (707), a rack (708) and a driving motor. The interior of the outer tube (701) is configured as a cylindrical chute structure with two ends open. The tail end of the cylindrical chute is provided with a coaxially arranged square columnar mounting groove. The inner tube (702) can be The inner tube (702) is slidably embedded in the cylindrical slide groove, and a horizontally penetrating limiting hole (705) is provided at the tail end of the inner tube (702). The two arc-shaped tiles (703) are buckled and wrapped and connected to the outer wall of the tail end of the inner tube (702), and a limiting block (704) matching the limiting hole (705) is provided on the inner concave surface of the arc-shaped tile (703). The interior of the limiting block (704) is set as a cavity structure with one end open. The arc-shaped tile (703) is provided with a hole that matches the limiting hole (705). The through hole communicates with the inner cavity of the limit block (704), the driving motor is embedded in the inner cavity of the limit block (704), and the power output end of the driving motor passes through the through hole on the arc tile (703) and is exposed on the outer convex surface of the arc tile (703), the gear (706) is fixedly connected to the power output end of the driving motor, and the two mounting plates (707) are symmetrically arranged on the two side walls of the square column mounting groove, and the upper and lower sides of each mounting plate (707) are respectively provided with a plurality of holes. The racks (708) are symmetrically arranged at both ends along the long side direction thereof, and the racks (708) are meshed with the gears (706). The front end of the inner tube (702) is provided with a pressure sensor, a soil moisture sensor, a soil temperature sensor, a soil conductivity sensor, and a soil pH sensor. The pressure sensor, the soil moisture sensor, the soil temperature sensor, the soil conductivity sensor, the soil pH sensor, and the drive motor are all electrically connected to the power supply and controller assembly (10).

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