Device and method for measuring content of organic matters in soil

Abstract

The invention discloses a soil organic matter content measuring device and method, relates to the technical field of detection devices, and solves the technical problem of sweeping. The soil organic matter content measuring device comprises a detection table, a vertical plate is fixedly mounted at the top of the detection table, and a placement plate is rotatably mounted on the side, close to the vertical plate, of the detection table; a detection head is installed on the side, close to the containing plate, of the vertical plate, a collecting groove is formed in the detection table, discharging openings are formed in the inner walls of the two sides of the collecting groove, a third motor is fixedly installed on the inner top wall of the collecting groove, and a sweeping assembly is arranged on the detection table. The cleaning assembly comprises a sliding groove formed in the position, close to the vertical plate, of the detection table, a first reciprocating lead screw is rotationally installed in the sliding groove, and a sliding block is installed on the first reciprocating lead screw in a threaded penetrating mode. The soil sample after detection is convenient to sweep, sweeping operation is convenient, the sweeping capacity of the device is improved, and the working efficiency of the device for detecting soil is improved.

Description

Technical Field

[0001] This invention relates to the field of detection device technology, specifically to a soil organic matter content determination device and method. Background Technology

[0002] Soil organic matter is the main source of various nutrients in the soil, especially nitrogen and phosphorus. It enables the soil to retain fertilizer and buffer, loosen the soil and form a structure, thereby improving the physical and chemical properties of the soil. It is one of the bases for soil classification. Soil organic matter content needs to be measured using a measuring device.

[0003] However, existing soil organic matter content measuring devices typically place the soil on a plate for testing. After testing, the soil needs to be manually collected for another sample test, which is inconvenient for cleaning the soil sample and affects the cleaning capacity and efficiency of the device. Therefore, based on the shortcomings of the technology, a soil organic matter content measuring device and method that can solve the above problems is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for determining soil organic matter content, and to solve the following technical problems: It is inconvenient to clean the soil samples after the test is completed, and the cleaning operation is inconvenient, which affects the cleaning ability of the device and the working efficiency of the device in testing soil.

[0005] The objective of this invention can be achieved through the following technical solutions: A soil organic matter content measuring device includes a testing platform, a vertical plate fixedly installed on the top of the testing platform, a placement plate rotatably installed on the side of the testing platform near the vertical plate, a testing head installed on the side of the vertical plate near the placement plate, a collection trough opened inside the testing platform, discharge ports opened on the inner walls of both sides of the collection trough, a third motor fixedly installed on the inner top wall of the collection trough, and a cleaning assembly provided on the testing platform. The cleaning assembly includes a sliding groove located on the testing platform near the upright plate. A first reciprocating screw is rotatably installed in the sliding groove. A slider is threaded through the first reciprocating screw. Two cleaning brushes are fixedly installed at one end of the slider near the upright plate. A first motor is fixedly installed on one side of the testing platform. A second fixing plate and a first fixing plate are fixedly installed at both ends of the collection tank near the third motor. A sealing plate is slidably installed between the first fixing plate and the second fixing plate. A discharge through hole is provided on the sealing plate and the inner top wall of the collection tank.

[0006] As a further aspect of the present invention: a movable plate is fixedly installed on one end of the sealing plate near the second fixed plate, a guide rod is slidably installed through the movable plate, and a spring is fixedly installed on the side of the movable plate away from the second fixed plate.

[0007] As a further embodiment of the present invention: a steering block is fixedly installed on the top wall of the collection tank near the third motor, and a pull rope is fixedly installed on the side of the moving plate away from the spring. The end of the pull rope away from the moving plate slides through the second fixed plate and the steering block and is fixedly installed on the slider.

[0008] As a further embodiment of the present invention: the two ends of the guide rod are respectively fixedly installed on the second fixed plate and the first fixed plate, the end of the spring away from the moving plate is fixedly installed on the first fixed plate, and the spring is nested on the guide rod.

[0009] As a further aspect of the present invention: the output end of the first motor slides through the slide groove and is fixedly installed on the first reciprocating lead screw, the slide groove and the collection groove are interconnected, and the top surface of the sealing plate and the inner top wall of the collection groove are slidably attached.

[0010] As a further aspect of the present invention: the testing platform is provided with a feeding assembly, the feeding assembly including a reciprocating groove formed on the inner wall of the collection groove near the slide groove, a second reciprocating screw is rotatably installed in the reciprocating groove, a reciprocating block is threaded through the second reciprocating screw, an extension plate is fixedly installed on the side of the reciprocating block near the third motor, a feeding plate is fixedly installed on the side of the extension plate away from the reciprocating block, and a half gear and a full gear are rotatably installed on the side of the testing platform away from the first motor.

[0011] As a further embodiment of the present invention: the half gear and the full gear are meshed together, the rotating shaft of the half gear rotates through the slide groove and is fixedly installed on the first reciprocating screw, the rotating shaft of the full gear rotates through the reciprocating groove and is fixedly installed on the second reciprocating screw, an inclined plate is fixedly installed between the feeding plate and the extension plate, and the bottom surface of the feeding plate slides against the inner bottom wall of the collecting groove.

[0012] As a further aspect of the present invention: a lifting assembly is provided on the upright plate, the lifting assembly includes a moving groove opened on the side of the upright plate near the detection head, a lifting block is slidably installed in the moving groove, a lifting screw is threaded through the lifting block, and a second motor is fixedly installed at the end of the upright plate away from the detection table.

[0013] As a further embodiment of the present invention: the output end of the second motor rotates through the moving groove and is fixedly installed on the lifting screw, the two ends of the lifting screw are rotatedly installed on the inner wall of the moving groove, and two balance bars are slidably installed through the lifting block, the two ends of the two balance bars are fixedly installed on the inner wall of the moving groove.

[0014] A method for determining soil organic matter content using a soil organic matter content determination device includes the following steps: First, the soil sample is placed on the placement plate. Then, the lifting assembly is activated to lower the detection head, allowing it to measure the soil on the placement plate. After the test is completed, the first reciprocating screw is activated, causing the slider to slide within the groove. This slider, in turn, drives the cleaning brush to sweep the tested soil sample from the placement plate into the discharge hole. The soil sample then enters the collection trough through the discharge hole. Simultaneously, when the cleaning brush moves close to the placement plate, the spring, via the moving plate, resets the sealing plate, aligning the two discharge holes. When the cleaning brush moves away from the placement plate, the slider pulls the rope, causing the rope to drive the sealing plate via the moving plate to block the discharge hole on the testing platform. This causes the first reciprocating screw half-gear to rotate, meshing with the full gear. The full gear, via the second reciprocating screw, drives the reciprocating block to slide within the reciprocating groove. The reciprocating block, via the extension plate, drives the discharge plate to push the collected soil from the collection trough to the outlet for discharge.

[0015] The beneficial effects of this invention are: (1) The cleaning brush and sealing plate in the cleaning assembly are convenient for cleaning the soil sample after the test is completed, and also convenient for sealing the discharge hole after the cleaning and collection is completed. This facilitates the cleaning operation, improves the cleaning ability of the device, improves the dust prevention ability of the device, and improves the working efficiency of the device in soil testing. (2) The feeding assembly makes it easy to use the power of the second reciprocating screw to push the soil collected in the collection tank through the feeding plate, which facilitates the reciprocating pushing and feeding, which is conducive to improving the pushing ability of the device and improving the feeding efficiency of the device. (3) The lifting component is easy to lift and adjust, which facilitates the testing operation, improves the lifting and adjustment capability of the device, and improves the working efficiency of the device testing. Attached Figure Description

[0016] The invention will now be further described with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of a soil organic matter content measuring device according to the present invention; Figure 2 This is a top view schematic diagram of a soil organic matter content measuring device according to the present invention; Figure 3 This is a schematic diagram of the internal structure of a soil organic matter content measuring device according to the present invention; Figure 4 yes Figure 3 Enlarged structural diagram at point A; Figure 5 This is a schematic diagram of the internal structure of a soil organic matter content measuring device according to the present invention, viewed from below. Figure 6 yes Figure 5 Enlarged structural diagram at point B; Figure 7 This is a partial structural schematic diagram of the cleaning component in a soil organic matter content measuring device of the present invention.

[0018] In the diagram: 1. Detection platform; 2. Vertical plate; 3. Detection head; 4. Cleaning assembly; 41. Slide groove; 42. Discharge through hole; 43. Cleaning brush; 44. Slider; 45. First reciprocating screw; 46. First motor; 47. First fixed plate; 48. Second fixed plate; 49. Sealing plate; 410. Moving plate; 411. Steering block; 412. Pull rope; 413. Guide rod; 414. Spring; 5. Discharge assembly; 51. Reciprocating groove; 52. Second reciprocating screw; 53. Reciprocating block; 54. Extension plate; 55. Discharge plate; 56. Inclined plate; 57. Half gear; 58. Full gear; 6. Lifting assembly; 61. Moving groove; 62. Lifting screw; 63. Balance bar; 64. Lifting block; 65. Second motor; 7. Placement plate; 8. Third motor; 9. Collection groove; 10. Discharge port. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1 - Figure 7 As shown, the present invention is a soil organic matter content measuring device, including a testing platform 1, a vertical plate 2 fixedly installed on the top of the testing platform 1, a placement plate 7 rotatably installed on the side of the testing platform 1 near the vertical plate 2, a testing head 3 installed on the side of the vertical plate 2 near the placement plate 7, the testing head 3 working with the placement plate 7 to measure the organic matter content of the soil sample, a collection trough 9 is provided inside the testing platform 1, and discharge ports 10 are provided on the inner walls of both sides of the collection trough 9, a third motor 8 is fixedly installed on the inner top wall of the collection trough 9, the output end of the third motor 8 rotatably passes through the testing platform 1 and is fixedly installed on the placement plate 7, and a cleaning component 4 is provided on the testing platform 1; The cleaning assembly 4 includes a groove 41 located on the inspection platform 1 near the vertical plate 2. A first reciprocating screw 45 is rotatably mounted in the groove 41. A slider 44 is threaded through the first reciprocating screw 45. Two cleaning brushes 43 are fixedly mounted on one end of the slider 44 near the vertical plate 2. A first motor 46 is fixedly mounted on one side of the inspection platform 1. The first motor 46 drives the first reciprocating screw 45 to rotate within the groove 41, causing the first reciprocating screw 45 to drive the slider 44 to reciprocate within the groove 41, thereby driving the two cleaning brushes 43. The soil on the placement plate 7 is swept away. A certain space exists between the two sweeping brushes 43, allowing them to perform a secondary cleaning of the placement plate 7. A second fixing plate 48 and a first fixing plate 47 are fixedly installed at both ends of the collection trough 9 near the third motor 8. A sealing plate 49 is slidably installed between the first fixing plate 47 and the second fixing plate 48, blocking the discharge through-hole 42. Discharge through-holes 42 are provided on both the sealing plate 49 and the inner top wall of the collection trough 9. These discharge through-holes 42 are used to clear and collect the sweeping brushes 43. The soil that has been moved away is connected to a movable plate 410 fixedly installed at one end of the sealing plate 49 near the second fixed plate 48. A guide rod 413 is slidably installed through the movable plate 410, which guides the movable plate 410 and supports and stabilizes the sealing plate 49. A spring 414 is fixedly installed on the side of the movable plate 410 away from the second fixed plate 48, which causes the sealing plate 49 to elastically reset. When the sealing plate 49 resets, the two discharge holes 42 overlap. A steering block 411 is fixedly installed on the top wall of the collection trough 9 near the third motor 8, which turns the pull rope 412, causing the pull rope 412 to be pulled and causing the two movable plates 410 to move relative to each other, thus stretching the spring 414. A pull rope 412 is fixedly installed on the side of the movable plate 410 away from the spring 414, and the end of the pull rope 412 away from the movable plate 410 slides through it. The second fixed plate 48 and the steering block 411 are fixedly mounted on the slider 44. The two ends of the guide rod 413 are respectively fixedly mounted on the second fixed plate 48 and the first fixed plate 47. The second fixed plate 48 and the first fixed plate 47 serve as the limiting and sealing plate 49. The end of the spring 414 away from the moving plate 410 is fixedly mounted on the first fixed plate 47. The spring 414 is nested on the guide rod 413. The output end of the first motor 46 slides through the slide groove 41 and is fixedly mounted on the first reciprocating screw 45. The slide groove 41 and the collection groove 9 are interconnected. The top surface of the sealing plate 49 slides against the inner top wall of the collection groove 9, which serves to seal the unloading and loading through hole 42 of the detection table 1. This facilitates cleaning the soil sample after the detection is completed and also facilitates sealing the unloading through hole 42 after cleaning and collection, minimizing soil dust flying, facilitating cleaning operations, improving the cleaning ability of the device, and improving the dustproof ability of the device.This will help improve the efficiency of the device in soil testing.

[0021] Please see Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the testing table 1 is equipped with a feeding assembly 5. The feeding assembly 5 includes a reciprocating groove 51 formed on the inner wall of the collecting groove 9 near the slide 41. A second reciprocating screw 52 is rotatably installed in the reciprocating groove 51. A reciprocating block 53 is threaded through the second reciprocating screw 52. The second reciprocating screw 52 drives the reciprocating block 53 to slide intermittently in the reciprocating groove 51. An extension plate 54 is fixedly installed on the side of the reciprocating block 53 near the third motor 8, and the side of the extension plate 54 away from the reciprocating block 53 is fixedly installed... A feeding plate 55 is fixedly installed, and an extension plate 54 facilitates the installation of the feeding plate 55. The feeding plate 55 pushes the soil collected in the collection tank 9 to the discharge port 10 for discharge. The bottom surface of the feeding plate 55 slides against the inner bottom wall of the collection tank 9. A half gear 57 and a full gear 58 are rotatably installed on the side of the detection table 1 away from the first motor 46. The half gear 57 and the full gear 58 are meshed. The number of teeth on the full gear 58 is four times the number of teeth on the half gear 57, thereby realizing the full gear 58 The intermittent rotation of the full gear 58 intermittently drives the second reciprocating screw 52 to rotate. The rotating shaft of the half gear 57 rotates through the slide groove 41 and is fixedly installed on the first reciprocating screw 45. The rotating shaft of the full gear 58 rotates through the reciprocating groove 51 and is fixedly installed on the second reciprocating screw 52. An inclined plate 56 is fixedly installed between the feeding plate 55 and the extension plate 54. The inclined plate 56 plays the role of supporting and stabilizing the feeding plate 55, which helps to increase the stability of the feeding plate 55. It is convenient to use the power of the second reciprocating screw 52 to move and feed the soil collected in the collection trough 9 through the feeding plate 55. It is convenient to move and feed the soil back and forth, which helps to improve the moving ability of the device and improve the working efficiency of the device.

[0022] Please see Figure 1 - Figure 3As shown, a lifting assembly 6 is provided on the upright plate 2. The lifting assembly 6 includes a movable groove 61 opened on the side of the upright plate 2 near the detection head 3. A lifting block 64 is slidably installed in the movable groove 61. A lifting screw 62 is threaded through the lifting block 64. The lifting screw 62 drives the detection head 3 to move up and down through the lifting block 64, which facilitates the adjustment of the distance between the detection head 3 and the placement plate 7. A second motor 65 is fixedly installed at the end of the upright plate 2 away from the detection table 1. The output end of the second motor 65 rotates through the movable groove 61 and is fixedly installed on the lifting screw 62. The two ends of the lifting screw 62 are rotatably installed on the inner wall of the movable groove 61. Two balance bars 63 are slidably installed through the lifting block 64. The two ends of the two balance bars 63 are fixedly installed on the inner wall of the movable groove 61. The balance bars 63 play the role of supporting and stabilizing the lifting block 64, which facilitates lifting and adjustment, facilitates detection operation, improves the lifting and adjustment capability of the device, and improves the working efficiency of the device detection.

[0023] A method for determining soil organic matter content using a soil organic matter content determination device includes the following steps: First, the soil sample is placed on the placement plate 7. Then, the lifting assembly 6 is activated to lower the detection head 3, allowing the detection head 3 to measure the soil on the placement plate 7. After the test is completed, the first reciprocating screw 45 is activated, causing the first reciprocating screw 45 to drive the slider 44 to slide within the slide groove 41. The slider 44 then drives the cleaning brush 43 to sweep the tested soil sample from the placement plate 7 into the discharge hole 42, allowing the soil sample to enter the collection trough 9 through the discharge hole 42. Simultaneously, when the cleaning brush 43 moves to a position close to the placement plate 7, the spring 414 drives the sealing plate 49 via the moving plate 410. Reset so that the two discharge through holes 42 coincide. When the cleaning brush 43 moves away from the placement plate 7, the pull rope 412 is pulled by the slider 44, causing the pull rope 412 to drive the sealing plate 49 through the moving plate 410 to block the discharge through hole 42 on the detection table 1. This causes the half gear 57 of the first reciprocating screw 45 to rotate, and the half gear 57 to mesh and drive the full gear 58 to rotate. The full gear 58 drives the reciprocating block 53 to slide in the reciprocating groove 51 through the second reciprocating screw 52. The reciprocating block 53 drives the discharge plate 55 through the extension plate 54 to push the soil collected in the collection trough 9 to the discharge port 10 for discharge.

[0024] The working principle of this invention is as follows: When using the device, first place the soil sample on the placement plate 7, then start the second motor 65, causing the output end of the second motor 65 to drive the lifting screw 62 to rotate in the moving groove 61, causing the lifting screw 62 to drive the lifting block 64 to slide on the balance bar 63, causing the lifting block 64 to drive the detection head 3 to move towards the placement plate 7. Then start the third motor 8, causing the output end of the third motor 8 to drive the placement plate 7 to rotate on the detection stage 1, facilitating the detection head 3 to perform a comprehensive measurement of the soil sample. After the measurement is completed, reverse the operation of the lifting assembly. Part 6 causes the lifting assembly 6 to move the detection head 3 upward, and then the first motor 46 is started, causing the output end of the first motor 46 to drive the first reciprocating screw 45 to rotate in the slide groove 41, causing the first reciprocating screw 45 to drive the slider 44 to slide in the slide groove 41. When the slider 44 moves to a position close to the placement plate 7, the slider 44 reduces the pull on the pull rope 412, causing the pull rope 412 to slide on the steering block 411 and the second fixed plate 48. The elastic restoring force of the spring 414 causes the moving plate 410 to slide on the guide rod 413. When the sealing plate 49 is reset, the material discharge through hole 42 on its surface and the material discharge through hole 42 on the inner top wall of the collection groove 9 are connected. The soil samples are aligned and overlapped, and the slider 44 drives the cleaning brush 43 to sweep the soil sample on the placement plate 7 into the discharge hole 42. The sample then falls into the collection trough 9 through the discharge hole 42 on the sealing plate 49. When the slider 44 moves to both ends of the trough 41, the tension of the slider 44 on the pull rope 412 is at its maximum, causing the pull rope 412 to slide on the steering block 411 and the second fixed plate 48. This causes the pull rope 412 to drive the moving plate 410 to slide on the guide rod 413, stretching the spring 414. The spring 414 is then in a stretched state, causing the two sealing plates 49 to move towards the placement plate 7, simultaneously causing the collection trough 9 to... The collecting trough 9 blocks the discharge through hole 42 on the testing platform 1, and at the same time, the first reciprocating screw 45 drives the half gear 57 to move synchronously, so that the half gear 57 meshes and drives the full gear 58 to rotate, so that the full gear 58 intermittently drives the second reciprocating screw 52 to rotate in the reciprocating groove 51, so that the second reciprocating screw 52 drives the reciprocating block 53 to slide in the reciprocating groove 51, so that the reciprocating block 53 drives the extension plate 54 to slide on the inner wall of the collecting trough 9, so that the extension plate 54 drives the discharge plate 55 to reciprocate on the collecting trough 9, which facilitates the movement of the soil sample collected in the collecting trough 9 to the discharge port 10 for discharge.

[0025] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A soil organic matter content measuring device, comprising a testing platform (1), characterized in that: A vertical plate (2) is fixedly installed on the top of the testing platform (1). A placement plate (7) is rotatably installed on the side of the testing platform (1) near the vertical plate (2). A testing head (3) is installed on the side of the vertical plate (2) near the placement plate (7). A collection trough (9) is opened inside the testing platform (1). A discharge port (10) is opened on the inner walls of both sides of the collection trough (9). A third motor (8) is fixedly installed on the inner top wall of the collection trough (9). A cleaning component (4) is provided on the testing platform (1). The cleaning assembly (4) includes a slide groove (41) located on the test platform (1) near the upright plate (2). A first reciprocating screw (45) is rotatably installed in the slide groove (41). A slider (44) is threaded through the first reciprocating screw (45). Two cleaning brushes (43) are fixedly installed at one end of the slider (44) near the upright plate (2). A first motor (46) is fixedly installed on one side of the test platform (1). A second fixing plate (48) and a first fixing plate (47) are fixedly installed at both ends of the collection tank (9) near the third motor (8). A sealing plate (49) is slidably installed between the first fixing plate (47) and the second fixing plate (48). A discharge through hole (42) is opened on the inner top wall of the sealing plate (49) and the collection tank (9).

2. The soil organic matter content measuring device according to claim 1, characterized in that: A movable plate (410) is fixedly installed on one end of the sealing plate (49) near the second fixed plate (48). A guide rod (413) is slidably installed on the movable plate (410). A spring (414) is fixedly installed on the side of the movable plate (410) away from the second fixed plate (48).

3. The soil organic matter content measuring device according to claim 2, characterized in that: A steering block (411) is fixedly installed on the top wall of the collection trough (9) near the third motor (8). A pull rope (412) is fixedly installed on the side of the moving plate (410) away from the spring (414). The end of the pull rope (412) away from the moving plate (410) slides through the second fixed plate (48) and the steering block (411) and is fixedly installed on the slider (44).

4. The soil organic matter content measuring device according to claim 3, characterized in that: The two ends of the guide rod (413) are fixedly installed on the second fixed plate (48) and the first fixed plate (47) respectively. The end of the spring (414) away from the moving plate (410) is fixedly installed on the first fixed plate (47). The spring (414) is nested on the guide rod (413).

5. The soil organic matter content measuring device according to claim 1, characterized in that: The output end of the first motor (46) slides through the slide groove (41) and is fixedly installed on the first reciprocating screw (45). The slide groove (41) and the collection groove (9) are interconnected. The top surface of the sealing plate (49) and the inner top wall of the collection groove (9) slide against each other.

6. The soil organic matter content measuring device according to claim 1, characterized in that: The testing platform (1) is provided with a feeding assembly (5). The feeding assembly (5) includes a reciprocating groove (51) opened on the inner wall of the collection groove (9) near the slide groove (41). A second reciprocating screw (52) is rotatably installed in the reciprocating groove (51). A reciprocating block (53) is threaded through the second reciprocating screw (52). An extension plate (54) is fixedly installed on the side of the reciprocating block (53) near the third motor (8). A feeding plate (55) is fixedly installed on the side of the extension plate (54) away from the reciprocating block (53). A half gear (57) and a full gear (58) are rotatably installed on the side of the testing platform (1) away from the first motor (46).

7. The soil organic matter content measuring device according to claim 6, characterized in that: The half gear (57) and the full gear (58) are meshed and connected. The rotating shaft of the half gear (57) rotates through the slide groove (41) and is fixedly installed on the first reciprocating screw (45). The rotating shaft of the full gear (58) rotates through the reciprocating groove (51) and is fixedly installed on the second reciprocating screw (52). An inclined plate (56) is fixedly installed between the feeding plate (55) and the extension plate (54). The bottom surface of the feeding plate (55) slides against the inner bottom wall of the collecting groove (9).

8. The soil organic matter content measuring device according to claim 1, characterized in that: The upright plate (2) is provided with a lifting assembly (6). The lifting assembly (6) includes a moving groove (61) opened on the side of the upright plate (2) near the detection head (3). A lifting block (64) is slidably installed in the moving groove (61). A lifting screw (62) is threaded through the lifting block (64). A second motor (65) is fixedly installed at the end of the upright plate (2) away from the detection table (1).

9. The soil organic matter content measuring device according to claim 8, characterized in that: The output end of the second motor (65) rotates through the moving groove (61) and is fixedly installed on the lifting screw (62). The two ends of the lifting screw (62) are rotatably installed on the inner wall of the moving groove (61). Two balance bars (63) are slidably installed on the lifting block (64). The two ends of the two balance bars (63) are fixedly installed on the inner wall of the moving groove (61).

10. A method for determining soil organic matter content using an apparatus, applicable to any one of claims 4, 5, 7, and 9, characterized in that: Includes the following steps: First, the soil sample is placed on the placement plate (7). Then, the lifting assembly (6) is activated to lower the detection head (3), allowing the detection head (3) to measure the soil on the placement plate (7). After the test is completed, the first reciprocating screw (45) is activated, causing the first reciprocating screw (45) to drive the slider (44) to slide in the groove (41). The slider (44) drives the cleaning brush (43) to clean the tested soil sample on the placement plate (7) into the discharge hole (42), allowing the soil sample to enter the collection tank (9) through the discharge hole (42). At the same time, when the cleaning brush (43) moves to a position close to the placement plate (7), the spring (414) drives the sealing plate (49) to reset through the moving plate (410). Make the two discharge holes (42) overlap. When the cleaning brush (43) moves away from the placement plate (7), the pull rope (412) is pulled by the slider (44), and the pull rope (412) drives the sealing plate (49) through the moving plate (410) to block the discharge hole (42) on the test table (1). This causes the half gear (57) of the first reciprocating screw (45) to rotate, and the half gear (57) meshes and drives the full gear (58) to rotate. The full gear (58) drives the reciprocating block (53) to slide in the reciprocating groove (51) through the second reciprocating screw (52). The reciprocating block (53) drives the discharge plate (55) through the extension plate (54) to push the soil collected in the collection trough (9) to the discharge port (10) for discharge.

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