A plant root growth monitoring and sampling device

Abstract

The present application relates to the technical field of sampling device, and particularly relates to a plant root growth monitoring sampling device, which comprises a sampling tube, an adjusting part, a drill bit and a plurality of sampling pellets, the adjusting part is arranged along the vertical direction and can rotate and move up and down, the adjusting part comprises an adjusting rod, a middle rod and a top rod which are coaxially arranged from top to bottom in the vertical direction, the middle rod is fixedly connected with the adjusting rod and the top rod respectively, and the drill bit is detachably installed at the lower end of the top rod. The plant root growth monitoring sampling device is cooperated with the sampling tube, the adjusting part and the sampling pellets, the cooperation state between the adjusting part and the sampling tube is changed, when the adjusting part moves upward relative to the sampling tube, the sampling pellets between the adjusting part and the sampling tube will gradually become curved, the curved sampling pellets can support the soil at the upper end of the sampling pellets, prevent the soil at the upper end from falling and mixing with the sampling soil, and ensure the accuracy of sampling.

Description

Technical Field

[0001] This invention relates to the field of sampling device technology, and specifically to a sampling device for monitoring plant root growth. Background Technology

[0002] In the cultivation of plants such as periwinkle and anemone, it is necessary to monitor their growth. Current technology can indirectly determine the growth status of plant roots by analyzing the composition of the soil in the root zone. Since plant roots are deeply buried in the soil, it is necessary to sample the root zone soil.

[0003] When sampling soil, one can first dig the soil to a certain depth using tools such as shovels, and then collect the soil sample. However, this sampling method is not only inefficient but also prone to damaging plant roots. Therefore, with the development of technology, this sampling method has been gradually phased out. Current technology typically uses sampling devices for sampling. The use of sampling devices greatly improves sampling efficiency. However, existing soil sampling devices can cause some mixing of samples from different depths during the sampling process, especially soil above the sampling space, which can easily fall into the sampling space, leading to inaccurate soil test data. Summary of the Invention

[0004] This invention provides a plant root growth monitoring sampling device to solve the problem that in existing sampling devices, soil above the sampling space tends to fall into the sampling space during the sampling process, resulting in a certain degree of mixing of soil samples and inaccurate soil test data.

[0005] The present invention provides a plant root growth monitoring and sampling device with the following technical solution: A plant root growth monitoring and sampling device includes a sampling tube, an adjusting component, a drill bit, a limiting component, and multiple sampling springs. The adjusting component is arranged vertically and can rotate and move up and down. The adjusting component includes an adjusting rod, a middle rod, and a top rod arranged coaxially from top to bottom in the vertical direction. The middle rod is fixedly connected to the adjusting rod and the top rod respectively. The drill bit is detachably installed at the lower end of the top rod. The sampling tube is arranged vertically and sleeved on the outside of the adjusting rod. A bottom plate is provided inside the sampling tube. Initially, the lower end face of the adjusting rod contacts the upper end face of the bottom plate, and when the adjusting rod moves downward, it can synchronously drive the sampling tube to move downward. The sampling springs are arranged vertically and have... The sampling spring is elastic, with its upper and lower ends fixed to the lower end face of the sampling tube and the upper end face of the top rod, respectively. Multiple sampling springs are evenly distributed along the circumferential direction of the sampling tube and the top rod. The adjusting member and the sampling tube have corresponding first and second states. In the first state, the adjusting member, the sampling tube, and the sampling spring are relatively stationary, and the sampling spring does not deform. The adjusting member and the sampling tube are initially in the first state. In the second state, the sampling tube rotates with the adjusting member, and the limiting member restricts the sampling tube from moving in the vertical direction. The adjusting member moves upward relative to the sampling tube. The upward movement of the adjusting member relative to the sampling tube can cause the sampling spring to deform, thereby defining a sampling port between two adjacent sampling springs, and the soil is sampled through the sampling port.

[0006] Furthermore, the sampling spring is an isosceles trapezoid, and the length of the upper base of the sampling spring is less than the length of the lower base. Multiple sampling springs are divided into a first sampling group and a second sampling group. There is at least one sampling spring in the first sampling group and the second sampling group. The sampling springs of the first sampling group and the second sampling group are alternately arranged along the circumferential direction of the sampling tube and the top rod. One side of the upper base of the first sampling group is connected to the lower end face of the sampling tube, and one side of the lower base of the first sampling group is connected to the upper end face of the top rod. One side of the lower base of the second sampling group is connected to the lower end face of the sampling tube, and one side of the upper base of the second sampling group is connected to the upper end face of the top rod.

[0007] Furthermore, the thickness of the bottom edge of the sampling spring is less than the thickness of the top edge.

[0008] Furthermore, it also includes a first adjusting frame and a second adjusting frame, which are arranged face to face in the axial direction of the sampling tube, with the first adjusting frame located below the second adjusting frame. When the adjusting member moves upward relative to the sampling tube, the first adjusting frame can drive the sampling spring of the first sampling group to deform along the upper half of the first axis in the circumferential direction of the sampling tube, and the second adjusting frame can drive the sampling spring of the second sampling group to deform along the lower half of the first axis in the circumferential direction of the sampling tube. The first axis is the midline along the waist of the sampling spring.

[0009] Furthermore, the first adjusting frame includes a first adjusting ring, multiple first telescopic rods, and multiple first connecting rods; the first adjusting ring is annular and coaxially arranged with the sampling tube, the first adjusting ring is sleeved on the middle section rod, and the first adjusting ring is splinedly connected to the middle section rod; the multiple first telescopic rods are evenly distributed in the circumferential direction of the first adjusting ring; one end of the first connecting rod is rotatably connected to the first telescopic rod, and the other end of the first connecting rod is rotatably connected to the top rod; the end of the first connecting rod connected to the first telescopic rod is positioned opposite the end of the first connecting rod connected to the top rod. The first adjustment ring is located near the central axis of the first adjustment ring; the end of the initial first telescopic rod away from the central axis of the first adjustment ring contacts the sampling spring of the first sampling group along the lower half of the first axis; a first elastic element is provided between the first adjustment ring and the support plate of the top rod; the second adjustment frame includes a second adjustment ring, multiple second telescopic rods, and multiple second connecting rods; the second adjustment ring is circular and coaxially arranged with the sampling tube, a connecting post is provided inside the sampling tube, the connecting post is coaxially arranged with the sampling tube, the connecting post is fixed to the lower end of the base plate, and the second adjustment ring is sleeved on the connecting post. The second adjusting ring is splined to the connecting column. Multiple second telescopic rods are evenly distributed circumferentially around the second adjusting ring. One end of the second connecting rod is rotatably connected to the second telescopic rod, and the other end is rotatably connected to the connecting column. The second connecting rod connected to the second telescopic rod is positioned on the side closer to the central axis of the second adjusting ring than the end connected to the connecting column. Initially, the end of the second telescopic rod furthest from the central axis of the second adjusting ring connects to the sampling spring on the lower end face of the sampling tube along the upper half of the first axis. The second telescopic rod and the first telescopic rod are spaced apart in the circumferential direction. A second elastic element is provided between the second adjusting ring and the base plate. Multiple support rods are provided inside the sampling tube. The multiple support rods are located at the lower end of the base plate and are spaced apart in the circumferential direction of the connecting column. Initially, the upper end face of the first adjusting ring abuts against the lower end face of the support rod, and the lower end face of the second adjusting ring abuts against the upper end face of the sleeve. A sampling port is formed between the lower bottom edge of each sampling spring along the first axis and the upper bottom edge of another adjacent sampling spring along the first axis.

[0010] Furthermore, a top block is provided at the end of both the first telescopic rod and the second telescopic rod away from the center line of the first adjusting ring.

[0011] Furthermore, the positioning component includes a limiting ring, multiple hydraulic cylinders, and multiple pressure rods; the limiting ring is an annular structure and can be sleeved on the outside of the sampling tube; multiple hydraulic cylinders are located on the lower end face of the limiting ring and are evenly distributed along the circumferential direction of the limiting ring; one end of each pressure rod is fixedly installed on the output end of the hydraulic cylinder, and the other end of each pressure rod is rotatably connected to a pressure block; the outer surface of the pressure block is a friction surface, and the pressure block can contact the outer peripheral wall of the sampling tube, so that the sampling tube can rotate and restrict the up and down movement of the sampling tube.

[0012] Furthermore, multiple legs are evenly distributed in the circumferential direction of the limiting ring. One end of each leg is rotatably connected to the limiting ring, and the other end of each leg is rotatably connected to a base.

[0013] Furthermore, the top rod has a hollow structure, and a support plate is installed inside the top rod. The support plate is a cross plate, and the middle section of the rod is fixedly connected to the support plate.

[0014] Furthermore, a receiving plate is provided at the upper end of the drill bit, and the lower end face of the base plate, the upper end face of the receiving plate, and the sampling spring form a sampling space.

[0015] The beneficial effects of the present invention are as follows: The plant root growth monitoring and sampling device of the present invention is configured with a sampling tube, an adjusting component and a sampling spring in cooperation with each other. The adjusting component rotates to drive the drill bit downward to cut the soil. By changing the cooperation state between the adjusting component and the sampling tube, when the adjusting component and the sampling tube are in the first state, the sampling tube and the adjusting component rotate downward into the soil simultaneously. After the sampling spring reaches the designated depth, manually rotate the adjusting member upwards to lift it. At this time, the adjusting member and the sampling tube are in the second state. The sampling tube rotates with the adjusting rod. As the adjusting member moves upwards relative to the sampling tube, the sampling spring between the adjusting member and the sampling tube will gradually become bent, thus defining a sampling port between two adjacent sampling springs. This allows soil to enter the sampling space from the sampling port. Sampling is completed during the circumferential rotation of the adjusting member. The bent sampling spring can support the soil at the top of the sampling spring. As the sampling spring continues to bend, the support surface for the soil will also increase with the increase in the deformation of the sampling spring, preventing the upper soil from falling and mixing with the sampled soil. This prevents soil from entering the sampling space during sampling, ensuring the accuracy of the sampling. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a plant root growth monitoring and sampling device of the present invention;

[0018] Figure 2 This is a front view of the overall structure of an embodiment of a plant root growth monitoring and sampling device of the present invention (sampling spring is not deformed).

[0019] Figure 3 for Figure 2 Sectional view at point AA along the middle;

[0020] Figure 4 for Figure 3 Enlarged view at point X;

[0021] Figure 5 This is an exploded view of the overall structure of an embodiment of a plant root growth monitoring and sampling device of the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of the first and second adjustment frames of an embodiment of a plant root growth monitoring and sampling device of the present invention;

[0023] Figure 7 This is an exploded view of a portion of the structure of the first adjustment frame of an embodiment of a plant root growth monitoring and sampling device of the present invention;

[0024] Figure 8 This is a schematic diagram of the sampling tube structure of an embodiment of a plant root growth monitoring and sampling device of the present invention;

[0025] Figure 9 This is a schematic diagram of the structure of the adjusting component in an embodiment of a plant root growth monitoring and sampling device of the present invention;

[0026] Figure 10 This is a front view of the overall structure (sampling spring deformation) of an embodiment of a plant root growth monitoring and sampling device of the present invention.

[0027] Figure 11 This is a schematic diagram of the sampling spring of another embodiment of the plant root growth monitoring and sampling device of the present invention.

[0028] In the diagram: 100, limiting component; 101, limiting ring; 102, hydraulic cylinder; 103, pressure block; 104, support leg; 200, sampling tube; 201, base plate; 202, first spline groove; 203, connecting column; 204, third spline groove; 205, support rod; 206, second hinge column; 300, adjusting component; 301, handle; 310, adjusting rod; 311, first spline; 32 0. Middle section rod; 321. Sleeve; 322. Second spline groove; 323. First hinge post; 330. Top rod; 331. Support plate; 400. Sampling spring; 500. Drill bit; 501. Support plate; 600. First adjusting frame; 601. First adjusting ring; 602. First telescopic rod; 603. First connecting rod; 604. Second spline; 605. First spring; 606. Top block. Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] An embodiment of the plant root growth monitoring and sampling device of the present invention, such as... Figures 1 to 10 As shown.

[0031] A plant root growth monitoring and sampling device includes a sampling tube 200, an adjusting component 300, a drill bit 500, a limiting component 100, and multiple sampling springs 400. The adjusting component 300 is vertically oriented and capable of rotation and vertical movement. The adjusting component 300 includes an adjusting rod 310, a middle rod 320, and a top rod 330 arranged sequentially from top to bottom in the vertical direction. The adjusting rod 310, middle rod 320, and top rod 330 are coaxially arranged, and the middle rod 320 is fixedly connected to both the adjusting rod 310 and the top rod 330. The diameters of the middle rod 320, adjusting rod 310, and top rod 330 increase sequentially. Specifically, the top rod 330 has a hollow structure, and a support plate 331, which is a cross-shaped plate, is disposed inside the top rod 330. The middle rod 320 is fixedly connected to the middle portion of the support plate 331.

[0032] A handle 301 is provided at the upper end of the adjusting rod 310, which can be held by the operator during use. The drill bit 500 can be detachably installed at the lower end of the top rod 330, and the drill bit 500 can drill into the soil.

[0033] The sampling tube 200 is vertically positioned and sleeved on the outside of the adjusting rod 310. The diameters of the sampling tube 200 and the top rod 330 are equal. A base plate 201 is installed inside the sampling tube 200, and the base plate 201 is integrally formed with the sampling tube 200. Initially, the lower end face of the adjusting rod 310 contacts the upper end face of the base plate 201. A through hole is provided on the base plate 201, through which the middle rod 320 passes downward. When the adjusting rod 310 moves downward, it can synchronously drive the sampling tube 200. The sampling tube 200 moves downward. Multiple first spline grooves 202 are evenly distributed along the circumferential direction on the inner wall of the sampling tube 200. The first spline grooves 202 are arranged vertically. Multiple first splines 311 are evenly distributed along the circumferential direction on the outer wall of the adjusting rod 310. The first splines 311 are arranged vertically and are slidably installed in the first spline grooves 202, so that the sampling tube 200 and the adjusting rod 310 can rotate synchronously and move relative to each other in the vertical direction.

[0034] The sampling spring 400 is vertically oriented and elastic. Its upper and lower ends are fixed to the lower end face of the sampling tube 200 and the upper end face of the push rod 330, respectively. Multiple sampling springs 400 are evenly distributed along the circumferential direction of the sampling tube 200 and the push rod 330. The adjusting member 300 and the sampling tube 200 have corresponding first and second states. In the first state, the adjusting member 300, the sampling tube 200, and the sampling spring 400 are relatively stationary, and the sampling spring 400 does not deform. Initially, the adjusting member 300 and... When the sampling tubes 200 are in the first state, and in the second state, the sampling tubes 200 rotate with the adjusting member 300, and the limiting member 100 restricts the sampling tubes 200 from moving vertically, causing the adjusting member 300 to move upward relative to the sampling tubes 200. The sampling spring 400 is pressed upward by the adjusting member 300, and the upward movement of the adjusting member 300 relative to the sampling tubes 200 causes the sampling spring 400 to deform, thereby defining a sampling port between two adjacent sampling springs 400, through which soil is sampled. The upper end of the drill bit 500 is provided with a receiving plate 501 for receiving the sampled soil. The lower end face of the bottom plate 201, the upper end face of the receiving plate 501, and the sampling spring 400 enclose a sampling space, allowing the soil to enter the sampling space from the sampling port during the rotation of the adjusting member 300. After sampling is completed, the drill bit 500 can be removed to extract the soil.

[0035] In use, the operator first manually rotates the handle 301 and applies a downward force, causing the adjusting member 300 to rotate downwards into the soil. At this time, the adjusting member 300 and the sampling tube 200 are in the first state, with the sampling tube 200 and the adjusting member 300 rotating downwards into the soil simultaneously. The required sampling depth is determined based on the root position of different plants during growth. After the sampling spring 400 reaches the designated depth, the limiting member 100 restricts the vertical movement of the sampling tube 200. At this time, the adjusting member 300 and the sampling tube 200 are in the second state, with the sampling tube 200 rotating with the adjusting rod 310. The adjusting member 300 moves upwards relative to the sampling tube 200. Then, the operator manually rotates the adjusting member 300 upwards, causing the sampling spring 400 between the adjusting member 300 and the sampling tube 200 to gradually bend, defining a sampling opening between two adjacent sampling springs 400. This allows soil to enter the sampling space from the sampling opening. The bent sampling spring 400... The 00 mechanism supports the soil at the top of the sampling spring 400, preventing the soil at the top of the sampling spring 400 from falling and mixing with the sampled soil, thus ensuring the accuracy of the sampling. After sampling is completed, the adjusting member 300 rotates and moves downward. At this time, the sampling tube 200 rotates with the adjusting rod 310, and the adjusting member 300 moves downward relative to the sampling tube 200. Then, the limiting member 100 no longer restricts the sampling tube 200 from moving in the vertical direction. The adjusting member 300 and the sampling tube 200 return to the first state. Then, the handle 301 is pulled upward to remove the adjusting member 300 and the sampling tube 200 from the ground. The drill bit 500 is disassembled, and the sampled soil is taken out from the sampling space for transfer, thus completing this sampling.

[0036] In this embodiment, the sampling tube 200, the adjusting member 300, and the sampling spring 400 are set up to cooperate with each other. The adjusting member 300 rotates to drive the drill bit 500 to cut the soil downward. By changing the state between the adjusting member 300 and the sampling tube 200, when the adjusting member 300 and the sampling tube 200 are in the first state, the sampling tube 200 and the adjusting member 300 rotate downward into the soil simultaneously. After the sampling spring 400 reaches the designated depth, the adjusting member 300 is manually rotated upwards and lifted. At this time, the adjusting member 300 and the sampling tube 200 are in the second state. The sampling tube 200 rotates with the adjusting rod 310, and the adjusting member 300 moves upwards relative to the sampling tube 200. The sampling spring 400 between the adjusting member 300 and the sampling tube 200 will gradually become bent, thereby defining a sampling port between two adjacent sampling springs 400, allowing soil to enter the sampling space from the sampling port. Sampling is completed during the circumferential rotation of the adjusting member 300. The bent sampling spring 400 can support the soil at the upper end of the sampling spring 400. As the sampling spring 400 continues to bend, the support surface for the soil will also increase as the deformation of the sampling spring 400 increases, preventing the upper soil from falling and mixing with the sampled soil. At the same time, soil is prevented from entering the sampling space, ensuring the accuracy of the sampling.

[0037] In this embodiment, the sampling spring 400 is an isosceles trapezoid, and the length of the upper base of the sampling spring 400 is shorter than the length of the lower base. Multiple sampling springs 400 are divided into a first sampling group and a second sampling group. At least one sampling spring 400 exists in each of the first and second sampling groups. The sampling springs 400 of the first and second sampling groups are alternately arranged along the circumferential direction of the sampling tube 200 and the push rod 330. One side of the upper base of the first sampling group is connected to the lower end face of the sampling tube 200, and one side of the lower base of the first sampling group is connected to the upper end face of the push rod 330. One side of the lower base of the second sampling group is connected to the lower end face of the sampling tube 200, and one side of the upper base of the second sampling group is connected to the upper end face of the push rod 330.

[0038] In this embodiment, a plant root growth monitoring sampling device further includes a first adjustment frame 600 and a second adjustment frame. The first adjustment frame 600 and the second adjustment frame are arranged face-to-face in the axial direction of the sampling tube 200, and the first adjustment frame 600 is located below the second adjustment frame. When the adjustment member 300 moves upward relative to the sampling tube 200, the first adjustment frame 600 can drive the sampling spring 400 of the first sampling group to deform along the lower half of the first axis in the circumferential direction of the sampling tube 200, and the second adjustment frame can drive the sampling spring 400 of the second sampling group to deform along the upper half of the first axis in the circumferential direction of the sampling tube 200. The first axis is the midline along the waist of the sampling spring 400, and the midline is the line connecting the midpoints of the two waists of the trapezoid.

[0039] In this embodiment, the first adjusting frame 600 includes a first adjusting ring 601, a plurality of first telescopic rods 602, and a plurality of first connecting rods 603. The first adjusting ring 601 is annular and coaxially arranged with the sampling tube 200. The first adjusting ring 601 is sleeved on the middle section rod 320, and the first adjusting ring 601 is splinedly connected to the middle section rod 320, so that the first adjusting ring 601 rotates synchronously with the middle section rod 320 but moves relative to the middle section rod 320. Specifically, the middle section rod 320 is sleeved with a... A sleeve 321 is coaxially arranged with the middle section rod 320. Multiple second spline grooves 322 are evenly distributed on the outer peripheral wall of the sleeve 321, arranged vertically. Multiple second splines 604 are evenly distributed on the inner peripheral wall of the first adjusting ring 601, arranged vertically. The second splines 604 are slidably installed within the second spline grooves 322, allowing the first adjusting ring 601 to rotate synchronously with the middle section rod 320 but move relative to it. Multiple first telescopic rods 602 are evenly distributed circumferentially on the first adjusting ring 601. One end of a first connecting rod 603 is rotatably connected to the first telescopic rod 602, and the other end is rotatably connected to the top rod 330. The end of the first connecting rod 603 connected to the first telescopic rod 602 is positioned on the side closest to the central axis of the first adjusting ring 601 relative to the end connected to the top rod 330. Initially, the end of the first telescopic rod 602 furthest from the central axis of the first adjusting ring 601 contacts the lower half of the sampling spring 400 of the first sampling group along the first axis. This causes the first telescopic rod 602 to extend away from the first adjusting ring 601, pushing the sampling spring 400 in contact with it to deform along the lower half of the first axis. A first elastic element, a first spring 605, is provided between the first adjusting ring 601 and the support plate 331 of the top rod 330.

[0040] The second adjusting frame includes a second adjusting ring, multiple second telescopic rods, and multiple second connecting rods. The second adjusting ring is circular and coaxially arranged with the sampling tube 200. A connecting post 203 is provided inside the sampling tube 200. The connecting post 203 is coaxially arranged with the sampling tube 200 and is fixed to the lower end of the base plate 201. The second adjusting ring is sleeved on the connecting post 203 and is splinedly connected to the connecting post 203, so that the second adjusting ring rotates synchronously with the connecting post 203 but moves relative to the connecting post 203. Specifically, multiple third spline grooves 204 are evenly distributed on the outer peripheral wall of the connecting post 203. The third spline grooves 204 are arranged in the vertical direction. Multiple third splines are evenly distributed on the inner peripheral wall of the second adjusting ring. The third splines are arranged in the vertical direction and are slidably installed in the third spline grooves 204, so that the second adjusting ring rotates synchronously with the connecting post 203 but moves relative to the connecting post 203. Multiple second telescopic rods are evenly distributed circumferentially around the second adjusting ring. One end of a second connecting rod is rotatably connected to a second telescopic rod, and the other end is rotatably connected to a connecting post 203. The end of the second connecting rod connected to the second telescopic rod is positioned closer to the central axis of the second adjusting ring than the end connected to the connecting post 203. Initially, the end of the second telescopic rod away from the central axis of the second adjusting ring and its lower edge contact the upper half of the sampling spring 400 of the second sampling group along the first axis. After the second telescopic rod extends away from the second adjusting ring, it pushes the sampling spring 400 in contact with it to deform along the lower half of the first axis. The deformation position of the sampling spring 400 in contact with the second telescopic rod is above the deformation position of the sampling spring 400 in contact with the first telescopic rod 602. The second telescopic rods and the first telescopic rod 602 are spaced apart circumferentially, so that every two adjacent sampling springs 400 contact one adjacent first telescopic rod 602 and one adjacent second telescopic rod. A second elastic element, which is a second spring, is provided between the second adjusting ring and the base plate 201. Multiple support rods 205 are provided inside the sampling tube 200, located at the lower end of the base plate 201. These support rods 205 are spaced apart circumferentially from the connecting column 203. Initially, the upper surface of the first adjusting ring 601 abuts against the lower surface of the support rod 205, and the lower surface of the second adjusting ring abuts against the upper surface of the sleeve 321. Each sampling spring 400 forms a sampling port between its lower bottom edge along the first axis and the upper bottom edge of its adjacent sampling spring 400 along the first axis, allowing soil to enter the sampling space through the sampling port.

[0041] Specifically, a plurality of first hinge posts 323 are evenly distributed on the outer peripheral wall of the sleeve 321. One end of the first connecting rod 603 is hinged to the first telescopic rod 602, and the other end of the first connecting rod 603 is hinged to the first hinge post 323. A plurality of second hinge posts 206 are evenly distributed on the outer peripheral wall of the connecting post 203. One end of the second connecting rod is hinged to the second telescopic rod, and the other end of the second connecting rod is hinged to the second hinge post 206.

[0042] Furthermore, a top block 606 is provided at the end of both the first telescopic rod 602 and the second telescopic rod away from the center line of the first adjusting ring 601. The sampling spring 400 is pushed by the top block 606.

[0043] In this embodiment, by setting up a first adjusting frame 600 and a second adjusting frame in cooperation, when the adjusting member 300 moves upward relative to the sampling tube 200, the first spring 605 is compressed first, causing the first connecting rod 603 to rotate relative to it. This causes the first telescopic rod 602 to move closer to its corresponding sampling spring 400, causing the lower end of the sampling spring 400 to extend away from the first adjusting ring 601. This causes the sampling spring 400 corresponding to the first telescopic rod 602 to deform. At the same time, the upper end face of the sleeve 321 contacts the lower end face of the second connecting ring, pushing the second connecting ring upward and compressing the second spring. This causes the second connecting rod to rotate relative to it, causing the second telescopic rod to move closer to its corresponding sampling spring 400, causing the sampling spring 405 to... The upper end extends away from the second adjusting ring, causing the sampling spring 400 corresponding to the second telescopic rod to deform. This allows the sampling spring 400 to support the soil being sampled during the sampling process as the adjusting member 300 rotates. The bending point is located on the lower edge of the sampling spring 400 along the first axis. As the adjusting member 300 moves upward, the deformation position gradually moves closer to the lower edge of the sampling spring 400 along the first axis. During the sampling process, the sampling spring 400 is always in contact with the soil, further increasing the contact area with the soil during support, increasing the force-bearing surface, and improving the support effect on the soil.

[0044] In this embodiment, the limiting member 100 includes a limiting ring 101, multiple hydraulic cylinders 102, and multiple pressure rods. The limiting ring 101 is an annular structure and can be sleeved on the outside of the sampling tube 200. The multiple hydraulic cylinders 102 are located on the lower end face of the limiting ring 101 and are evenly distributed along the circumferential direction of the limiting ring 101. One end of each pressure rod is fixedly installed on the output end of the hydraulic cylinder 102, and the other end of each pressure rod is rotatably connected to a pressure block 103. The outer surface of the pressure block 103 is a friction surface, and the pressure block 103 can contact the outer peripheral wall of the sampling tube 200, so that the sampling tube 200 can rotate and restrict the up and down movement of the sampling tube 200. Multiple support legs 104 are evenly distributed along the circumferential direction of the limiting ring 101. One end of the multiple support legs 104 is rotatably connected to the limiting ring 101, and the other end of the multiple support legs 104 is rotatably connected to a base, which is installed on the ground.

[0045] After the adjusting component 300 drives the sampling tube 200 to insert into the soil, the operator manually places the limiting ring 101 on the outside of the sampling tube 200, and then installs the base at the lower end of the support leg 104 on the ground. Next, the hydraulic cylinder 102 is activated, causing it to drive the pressure rod closer to the sampling tube 200, which in turn drives the pressure block 103 closer to the sampling tube 200 until the sampling tube 200 and the pressure block 103 are pressed together. At this time, the sampling tube 200 rotates with the adjusting component 300, and the adjusting component 300 moves upward relative to the sampling tube 200, i.e., it is in the second state between the adjusting component 300 and the sampling tube 200. After sampling is completed, the adjusting component 300 rotates and moves downward. At this time, the sampling tube 200... As the adjusting rod 310 rotates, the adjusting component 300 moves downward relative to the sampling tube 200. At the same time, the hydraulic cylinder 102 drives the pressure block 103 away from the sampling tube 200, releasing the limit on the sampling tube 200, so that the adjusting component 300 and the sampling tube 200 return to the first state. Then, the handle 301 is pulled upward to remove the adjusting component 300 and the sampling tube 200 from the ground. The drill bit 500 is disassembled, and the sampled soil is taken out from the sampling space for transfer, thus completing this sampling.

[0046] In conjunction with the above embodiments, the specific working principle and process are as follows: During use, the operator first manually rotates the handle 301 and applies a downward force, causing the adjusting member 300 to rotate downwards into the soil. At this time, the adjusting member 300 and the sampling tube 200 are in the first state, with the sampling tube 200 and the adjusting member 300 rotating downwards into the soil simultaneously. The required sampling depth is determined based on the location of the roots during different plant growth stages. After the sampling spring 400 reaches the designated depth, the operator manually places the limiting ring 101 onto the outside of the sampling tube 200, and then installs the base at the lower end of the support leg 104 on the ground. Next, the hydraulic cylinder 102 is started, causing the hydraulic cylinder 102 to drive the pressure rod to approach the sampling tube 200, which in turn drives the pressure block 103 to approach the sampling tube 200 until the sampling tube 200 and the pressure block 103 are pressed together. At this time, the sampling tube 200 rotates with the adjusting member 300 and the adjusting member 300 moves upward relative to the sampling tube 200, that is, it is in the second state between the adjusting member 300 and the sampling tube 200.

[0047] Next, manually rotate and lift the adjusting member 300 upwards. At this time, the adjusting member 300 and the sampling tube 200 are in the second state. The sampling tube 200 rotates with the adjusting rod 310, and the adjusting member 300 moves upwards relative to the sampling tube 200. When the adjusting member 300 moves upwards relative to the sampling tube 200, it can first compress the first spring 605, causing the first connecting rod 603 to rotate relative to it. This causes the first telescopic rod 602 to move closer to the corresponding sampling spring 400, causing the lower end of the sampling spring 400 to extend away from the first adjusting ring 601. This causes the sampling spring 400 corresponding to the first telescopic rod 602 to deform. At the same time, the upper end face of the sleeve 321 contacts the lower end face of the second connecting ring, pushing the second connecting ring upwards and compressing the second spring, causing the first spring 605 to rotate upwards relative to the sampling tube 201. The two connecting rods rotate relative to each other, causing the second telescopic rod to move closer to the corresponding sampling spring 400. This causes the upper end of the sampling spring 400 to extend away from the second adjusting ring, resulting in deformation of the sampling spring 400 corresponding to the second telescopic rod. The sampling spring 400 between the adjusting member 300 and the sampling tube 200 gradually becomes curved, allowing soil to enter the sampling space from the sampling port. During the sampling process, the deformation of the sampling spring 400 can support the soil above it. Setting the bending point on the lower edge of the sampling spring 400 along the first axis further increases the contact area with the soil during support, increases the force-bearing surface, and improves the support effect on the soil.

[0048] After sampling is completed, the adjusting member 300 rotates and moves downward. At this time, the sampling tube 200 rotates with the adjusting rod 310, and the adjusting member 300 moves downward relative to the sampling tube 200. At the same time, the hydraulic cylinder 102 drives the pressure block 103 away from the sampling tube 200, releasing the limit on the sampling tube 200, so that the adjusting member 300 and the sampling tube 200 return to the first state. Then, the handle 301 is pulled upward to remove the adjusting member 300 and the sampling tube 200 from the ground, the drill bit 500 is disassembled, and the sampled soil is taken out from the sampling space for transfer, thus completing this sampling.

[0049] In another possible embodiment, the sampling spring 400 is rectangular. One of the two short sides of the sampling spring 400 is fixed to the lower end face of the sampling tube 200 and the upper end face of the top rod 330, respectively. A plant root growth monitoring sampling device also includes a first adjusting frame 600 and a second adjusting frame. The first adjusting frame 600 and the second adjusting frame are arranged facing each other in the axial direction of the sampling tube 200, with the first adjusting frame 600 positioned below the second adjusting frame. When the adjusting member 300 moves upward relative to the sampling tube 200, the first adjusting frame 600 can drive the two spaced-apart sampling springs 400 to deform along the upper half of a first axis in the circumferential direction of the sampling tube 200. The second adjusting frame can drive the two spaced-apart sampling springs 400 to deform along the lower half of the first axis in the circumferential direction of the sampling tube 200. The first axis is the midline along the long side of the sampling spring 400. The structures of the first adjusting frame 600 and the second adjusting frame are the same as in the above embodiment. In this embodiment, the sampling spring 400 is set to a rectangular shape, which can also achieve soil support.

[0050] In another possible embodiment, such as Figure 11 As shown, the sampling spring 400 is an isosceles trapezoid, and the length of the upper base of the sampling spring 400 is shorter than the length of the lower base. The upper base of each sampling spring 400 and the lower base of its adjacent sampling spring 400 are sequentially arranged circumferentially on the lower end face of the sampling tube 200. The thickness of the lower base of the sampling spring 400 along the first axis is less than the thickness of the upper base. This makes the wider side of the sampling spring 400 more prone to deformation than the narrower side when the adjusting member 300 moves upward relative to the sampling tube 200. This allows the wider side of the sampling spring 400 to deform more easily when the adjusting member 300 and the sampling tube 200 approach each other. In other words, this embodiment does not require a first adjusting frame 600 or a second adjusting frame drive; it allows the lower base of the sampling spring 400 to deform more easily during the upward movement of the adjusting member 300 relative to the sampling tube 200, ensuring effective support for the soil during sampling.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plant root system growth monitoring and sampling device, characterised in that: The sampling device comprises a sampling tube, an adjusting member, a drill bit, a limiting member and a plurality of sampling pieces, the adjusting member is arranged along the vertical direction and can rotate and move up and down, the adjusting member comprises an adjusting rod, a middle rod and a top rod which are coaxially arranged from top to bottom along the vertical direction, the middle rod is fixedly connected with the adjusting rod and the top rod respectively, the drill bit is detachably installed at the lower end of the top rod, the sampling tube is arranged along the vertical direction and is sleeved outside the adjusting rod, a bottom plate is arranged inside the sampling tube, the lower end surface of the initial adjusting rod is in contact with the upper end surface of the bottom plate, and the sampling tube can be synchronously moved downward when the adjusting rod moves downward, the sampling pieces are arranged along the vertical direction and are elastic, the upper and lower ends of the sampling pieces are fixedly connected with the lower end surface of the sampling tube and the upper end surface of the top rod respectively, and the plurality of sampling pieces are uniformly distributed along the circumferential direction of the sampling tube and the top rod. The adjusting member and the sampling tube have corresponding first and second states, when in the first state, the adjusting member, the sampling tube and the sampling pieces are relatively static, the sampling pieces do not deform, and the initial adjusting member and the sampling tube are in the first state, when in the second state, the sampling tube rotates with the adjusting member, the limiting member limits the movement of the sampling tube in the vertical direction, the adjusting member moves upward relative to the sampling tube, the upward movement of the adjusting member relative to the sampling tube can cause the deformation of the sampling pieces, thereby defining a sampling port between two adjacent sampling pieces, and the soil is sampled through the sampling port. The sampling pieces are isosceles trapezoids, the length of the upper base of the sampling pieces is less than the length of the lower base, the plurality of sampling pieces are divided into a first sampling group and a second sampling group, at least one sampling piece is in the first sampling group and the second sampling group, the sampling pieces in the first sampling group and the second sampling group are alternately arranged along the circumferential direction of the sampling tube and the top rod, one side of the upper base of the sampling pieces in the first sampling group is connected with the lower end surface of the sampling tube, one side of the lower base of the sampling pieces in the first sampling group is connected with the upper end surface of the top rod, one side of the lower base of the sampling pieces in the second sampling group is connected with the lower end surface of the sampling tube, and one side of the upper base of the sampling pieces in the second sampling group is connected with the upper end surface of the top rod. The first adjusting frame and the second adjusting frame are arranged face to face in the axial direction of the sampling tube, the first adjusting frame is arranged below the second adjusting frame, when the adjusting member moves upward relative to the sampling tube, the first adjusting frame can drive the sampling pieces in the first sampling group to deform along the upper half of the first axis in the circumferential direction of the sampling tube, the second adjusting frame can drive the sampling pieces in the second sampling group to deform along the lower half of the first axis in the circumferential direction of the sampling tube, and the first axis is a midline along the waist of the sampling piece.

2. A plant root growth monitoring and sampling device according to claim 1, characterised in that: The thickness of one side of the lower base of the sampling piece is less than the thickness of one side of the upper base.

3. A plant root growth monitoring and sampling device according to claim 1, characterised in that: The first adjusting frame comprises a first adjusting ring, a plurality of first telescopic rods and a plurality of first connecting rods; the first adjusting ring is coaxially arranged with the sampling tube and is in the shape of a circular ring, the first adjusting ring is sleeved on the middle section rod, and the first adjusting ring is in spline connection with the middle section rod; the plurality of first telescopic rods are uniformly distributed in the circumferential direction of the first adjusting ring; one end of the first connecting rod is rotatably connected with the first telescopic rod, the other end of the first connecting rod is rotatably connected with the top rod, and the end of the first connecting rod connected with the first telescopic rod is arranged on the side close to the central axis of the first adjusting ring relative to the end of the first connecting rod connected with the top rod; the end of the initial first telescopic rod away from the central axis of the first adjusting ring is in contact with the sampling spring sheet of the first sampling group along the lower half of the first axis; the first elastic member is arranged between the first adjusting ring and the support plate of the top rod; the second adjusting frame comprises a second adjusting ring, a plurality of second telescopic rods and a plurality of second connecting rods; the second adjusting ring is coaxially arranged with the sampling tube and is in the shape of a circular ring; the sampling tube is internally provided with a connecting column, the connecting column is coaxially arranged with the sampling tube, the connecting column is fixedly connected with the lower end of the bottom plate, the second adjusting ring is sleeved on the connecting column, and the second adjusting ring is in spline connection with the connecting column; the plurality of second telescopic rods are uniformly distributed in the circumferential direction of the second adjusting ring; one end of the second connecting rod is rotatably connected with the second telescopic rod, the other end of the second connecting rod is rotatably connected with the connecting column, and the end of the second connecting rod connected with the second telescopic rod is arranged on the side close to the central axis of the second adjusting ring relative to the end of the second connecting rod connected with the connecting column; the end of the initial second telescopic rod away from the central axis of the second adjusting ring is in contact with the sampling spring sheet on the lower end surface of the sampling tube along the upper half of the first axis; the second telescopic rod and the first telescopic rod are arranged at intervals in the circumferential direction; the second elastic member is arranged between the second adjusting ring and the bottom plate; the sampling tube is internally provided with a plurality of support rods; the plurality of support rods are arranged on the lower end of the bottom plate; the plurality of support rods are arranged at intervals in the circumferential direction of the connecting column; the upper end surface of the initial first adjusting ring is in abutment with the lower end surface of the support rod; the lower end surface of the second adjusting ring is in abutment with the upper end surface of the sleeve; and a sampling port is formed between the lower side of the lower bottom edge of each sampling spring sheet along the first axis and the upper side of the upper bottom edge of another sampling spring sheet adjacent to the sampling spring sheet along the first axis.

4. A plant root growth monitoring and sampling apparatus as claimed in claim 3, wherein: The end of the first telescopic rod and the end of the second telescopic rod away from the central line of the first adjusting ring are both provided with a top block.

5. A plant root growth monitoring and sampling device according to claim 1, wherein: The limiting member comprises a limiting ring, a plurality of hydraulic cylinders and a plurality of pressing rods; the limiting ring is in the shape of a ring and can be sleeved on the sampling tube; the plurality of hydraulic cylinders are arranged on the lower end surface of the limiting ring and are uniformly distributed in the circumferential direction of the limiting ring; one end of each pressing rod is fixedly installed on the output end of the hydraulic cylinder; the other end of each pressing rod is rotatably connected with a pressing block; the outer surface of the pressing block is a friction surface; the pressing block can be in contact with the peripheral wall surface of the sampling tube, so that the sampling tube can be rotated and the upward and downward movement of the sampling tube can be limited.

6. A plant root growth monitoring and sampling apparatus as claimed in claim 5, wherein: The limiting ring is uniformly provided with a plurality of supporting legs in the circumferential direction; one end of each supporting leg is rotatably connected with the limiting ring; the other end of each supporting leg is rotatably connected with a base.

7. A plant root growth monitoring and sampling device according to claim 1, wherein: The top rod is in a hollow structure; the top rod is internally provided with a support plate; the support plate is in the shape of a cross plate; the middle section rod is fixedly connected with the support plate.

8. A plant root growth monitoring and sampling device according to claim 1, wherein: The upper end of the drill bit is provided with a receiving plate; the lower end surface of the bottom plate, the upper end surface of the receiving plate and the sampling spring sheet enclose a sampling space. The top rod is in a hollow structure; the top rod is internally provided with a support plate; the support plate is in the shape of a cross plate; the middle section rod is fixedly connected with the support plate. The upper end of the drill bit is provided with a receiving plate; the lower end surface of the bottom plate, the upper end surface of the receiving plate and the sampling spring sheet enclose a sampling space.

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