A device for measuring agronomic traits of crops

Abstract

This utility model discloses a device for measuring agronomic traits of crops, relating to the field of crop measurement technology, and solves the technical problems of low measurement efficiency and accuracy of existing devices. This utility model includes an adjusting rod, a guide rail, a movable ring, and an angle measuring component. The adjusting rod and the guide rail are arranged parallel to each other and connected at their top ends by a first connector. At least one movable ring for a plant to pass through is slidably mounted on the guide rail, and the angle measuring component is slidably mounted on the movable ring. The movable ring is used to limit the plant's movement. The adjusting rod and / or the guide rail are provided with a first scale. The plant height is measured by raising and lowering the adjusting rod and the guide rail. This utility model has the advantages of high measurement efficiency and high accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of crop measurement technology, specifically relating to a crop agronomic trait measurement device. Background Technology

[0002] Agronomic traits refer to a series of characteristics that represent the features of a crop variety. They mainly include characteristics related to plant growth, development and yield formation, such as growth period, plant height, leaf area and fruit weight. These traits are of great significance to crop planting management, variety selection and yield and quality. As a common crop, corn has agronomic traits including plant height, leaf characteristics, stem characteristics and grain weight.

[0003] When measuring agronomic traits of corn plants, it is often necessary to have two or more people measuring different traits. Furthermore, when measuring the angle between the leaves and the plant, the plant may tilt due to its growth, which can lead to inaccurate measurements and low efficiency. Utility Model Content

[0004] In view of this, the present invention provides a crop agronomic trait measuring device, which aims to solve the technical problems of low measurement efficiency and accuracy of existing devices.

[0005] To solve the aforementioned technical problems, the present invention adopts the following technical solution:

[0006] A device for measuring agronomic traits of crops includes an adjusting rod, a guide rail, a movable ring, and an angle measuring component.

[0007] The adjusting rod and the guide rail are arranged parallel to each other and connected at their top ends by a first connector. At least one movable ring for the plant to pass through is slidably provided on the guide rail. The angle measuring component is slidably provided on the movable ring. The movable ring is used to limit the position of the plant.

[0008] The adjusting rod and / or the guide rail are provided with a first scale, and the height of the plant is measured by raising and lowering the adjusting rod and the guide rail.

[0009] In this invention, both the adjusting rod and the guide rail are telescopic structures. The height of the adjusting rod can be adjusted according to the height of the plant. The raising and lowering of the adjusting rod causes the guide rail to rise and fall accordingly until the guide rail rises and falls to the same height as the plant. The plant height can then be read through the first scale. In actual use, the plant passes through the movable ring, which limits the plant and prevents it from shifting and affecting the accuracy of the measurement. In addition, the angle measuring component can measure the angle between the leaf and the plant, thus achieving rapid measurement while ensuring measurement accuracy.

[0010] Preferably, a fixing component is slidably provided on the inner side of the movable ring, the fixing component including a sliding plate, a connecting plate, and rollers.

[0011] The sliding plate is slidably connected to the two sides of the movable ring. A connecting plate is provided on one side of the sliding plate, and a roller is provided on the connecting plate. The axis of the roller is perpendicular to the axis of the adjusting rod and the guide rail. An elastic element is connected between the other side of the sliding plate and the movable ring.

[0012] After adopting this technical solution, it should be noted that when the plant passes through the movable ring, the roller rolls along the surface of the plant. Under the elastic force of the elastic element, the roller squeezes the plant towards the inner wall of the movable ring, thereby fixing the plant and keeping it upright, which helps to improve the measurement accuracy. When the plant diameter changes, the energy absorption buffer of the elastic element prevents the roller from crushing the plant.

[0013] Preferably, the roller has a groove.

[0014] After adopting this technical solution, it should be noted that the groove is used to limit the plant to the left and right to prevent the plant from tilting and further increase the accuracy of measurement.

[0015] Preferably, the angle measuring assembly includes a fixed plate, an adjusting plate, and a measuring plate.

[0016] The adjusting plate is hinged to one end of the fixed plate near the inner side of the movable ring. The measuring plate is provided on both sides of the fixed plate, and the measuring plate is provided with a second scale.

[0017] After adopting this technical solution, it should be noted that when it is necessary to measure the angle between the leaf and the plant, move the movable ring to the point where the measurement is needed, fix the plant with the fixing component, and then rotate the adjustment plate to be parallel to the leaf, or place the leaf on the adjustment plate and then rotate the adjustment plate back to the original position of the leaf. Since the fixing plate is parallel to the movable ring, the angle between the leaf and the plant is reflected by the angle between the fixing plate and the adjustment plate. The rotation angle of the adjustment plate can be directly read through the second scale.

[0018] Preferably, the movable ring is square, with a first groove at the upper end and second grooves on the two inner sides opposite to each other. A sliding ball is connected to the lower end of the fixed plate via a connecting rod. The sliding ball is slidably disposed in the first groove. Second sliders are provided on both sides of the sliding plate. The second sliders are slidably disposed in the second grooves. The elastic element is disposed between the second sliders and the second grooves.

[0019] After adopting this technical solution, it should be noted that the lower end of the fixed plate is provided with two connecting rods, and the lower end of each connecting rod is connected to a sliding ball. The upper surfaces of the two ends of the movable ring adjacent to the guide rail and the upper surface of the end opposite to the guide rail are provided with first sliding grooves, which are interconnected. The angle measuring component can move according to the position of the blade, thereby facilitating measurement. In addition, it should be noted that the friction between the sliding ball and the first sliding groove can keep the angle measuring component from sliding when measuring the angle.

[0020] Preferably, the adjusting rod includes a fixed rod, an adjusting ring, and a telescopic rod.

[0021] The telescopic rod is movably disposed inside the fixed rod. The upper end of the fixed rod is provided with the adjusting ring. The inner wall of the adjusting ring and the outer wall of the telescopic rod are provided with threads that can cooperate with each other. The inner wall of the fixed rod is provided with a limiting guide rail along the axial direction. The lower outer wall of the telescopic rod is provided with a third slider. The limiting guide rail and the third slider are slidably engaged.

[0022] After adopting this technical solution, it should be noted that when rotating and adjusting, due to the threaded connection between the inner wall of the adjusting ring and the outer surface of the telescopic rod, and the sliding cooperation between the third slider and the limiting guide rail, the rotation of the telescopic rod will be restricted. Therefore, the telescopic rod can only move along the axial direction of the fixed rod, thereby driving the guide rail to move.

[0023] Preferably, the lower end of the adjusting ring is provided with an annular second limiting groove, the side wall of the second limiting groove is provided with an annular first limiting groove, the upper outer wall of the fixing rod is provided with a first slider, the upper end of the fixing rod is slidably engaged with the second limiting groove, and the first slider is slidably engaged with the first limiting groove.

[0024] After adopting this technical solution, it should be noted that the first slider can be annular and surround the outer wall of the fixed rod. The first slider cooperates with the first limiting groove to limit the adjustment ring and the fixed rod, so that the adjustment ring will not fall off.

[0025] Preferably, the guide rail includes a fixed guide rail and a telescopic guide rail, the telescopic guide rail is movably disposed within the fixed guide rail, the upper end of the telescopic guide rail is provided with the first connecting member, the other end of the first connecting member is connected to the upper end of the telescopic rod, and a second connecting member is connected between the fixed guide rail and the fixed rod.

[0026] After adopting this technical solution, it should be noted that both the fixed guide rail and the telescopic guide rail are provided with a third slide groove on both sides. The movable ring has a notch on the side near the guide rail. The movable ring slides in the third slide groove at the notch. The friction between the third slide groove and the movable ring achieves fixation during measurement. When the adjusting ring is rotated to raise and lower the telescopic rod, the first connecting piece drives the telescopic guide rail to move. The function of the second connecting piece is to enhance the stability of the device.

[0027] Preferably, the telescopic guide rail is provided with a baffle on the side away from the telescopic rod.

[0028] After adopting this technical solution, it should be noted that when measuring plant height by adjusting the height of the telescopic guide rail through the adjusting ring, the plant height is determined when the baffle contacts the top of the plant. At this point, the first scale value is read as the plant height. In addition, the first scale is set on both the fixed guide rail and the telescopic guide rail for easy reading. The value of the first scale on the fixed guide rail increases from bottom to top, while the value of the first scale on the telescopic guide rail decreases from bottom to top. When the telescopic guide rail is completely within the fixed guide rail, the maximum value of the first scale on the fixed guide rail is the same as the minimum value of the first scale on the telescopic guide rail, and they correspond to each other. The maximum value of the first scale on the fixed guide rail and the minimum value of the first scale on the telescopic guide rail are the height of the fixed guide rail. Simply put, as the telescopic guide rail rises, the value of the first scale on the telescopic guide rail gradually increases from the height of the fixed guide rail until it is the same as the plant height.

[0029] Preferably, the lower end of the fixing rod is provided with a fixing nail, and the lower end of the fixing guide rail is provided with a support base.

[0030] After adopting this technical solution, it should be noted that during use, fixing nails are inserted into the ground to fix the overall device, and the support base is used to support the fixed guide rail.

[0031] Preferably, the inner wall of the movable ring is provided with a third scale along the moving direction of the sliding plate. The third scale reflects the distance between the side wall of the sliding plate and the side wall of the movable ring. The diameter of the plant is obtained by subtracting the distance between the side wall of the sliding plate and the groove on the side away from the sliding plate from the third scale. The third scale is set according to the above calculation method, which can directly reflect the diameter of the plant.

[0032] Preferably, the movable ring 3 has a notch on the side away from the guide rail 2, and a movable rod 25 is connected between the notches. A first magnetic attractor 23 is provided on the side of the notch, and a second magnetic attractor 24 is provided on the side of the movable rod 25.

[0033] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0034] 1. The present invention provides a crop agronomic trait measuring device, which limits the plant by setting a movable ring to prevent the plant from shifting and affecting the measurement accuracy. In addition, the angle measuring component can measure the angle between the leaf and the plant, and the plant height can be read through the first scale, thereby achieving rapid measurement while ensuring measurement accuracy.

[0035] 2. The present invention provides a crop agronomic trait measuring device, which, by setting a fixing component, allows the roller to roll along the surface of the plant as the plant passes through the movable ring. Under the elastic force of the elastic element, the roller presses the plant against the inner wall of the movable ring, thereby fixing the plant and keeping it upright, which helps to improve the measurement accuracy.

[0036] 3. The crop agronomic trait measuring device provided by this utility model, by setting grooves on the rollers to limit the plant to the left and right, prevent the plant from tilting, and further increase the measurement accuracy.

[0037] 4. The present invention provides a crop agronomic trait measuring device, which can read the plant diameter by setting a third scale. Attached Figure Description

[0038] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0039] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0040] Figure 2 This is a cross-sectional view of the adjusting rod of this utility model;

[0041] Figure 3 This utility model Figure 2 Enlarged schematic diagram at point I;

[0042] Figure 4 This is a schematic diagram of the adjusting ring structure of this utility model;

[0043] Figure 5 This is a schematic diagram of the structure of the movable ring, angle measuring component, and fixed component of this utility model;

[0044] Figure 6 This is a schematic diagram of the angle measuring component of this utility model;

[0045] Figure 7 This utility model Figure 5 Sectional view along line AA;

[0046] Figure 8 This is a schematic diagram of one embodiment of the present utility model;

[0047] Figure 9 This is a schematic diagram of one embodiment of the present invention.

[0048] Figure label:

[0049] 1-Adjusting rod, 101-Fixed rod, 102-Adjusting ring, 103-Telescopic rod, 2-Guide rail, 201-Fixed guide rail, 202-Telescopic guide rail, 3-Moving ring, 301-First slide groove, 302-Second slide groove, 4-Baffle, 5-First connector, 6-Second connector, 7-Connecting cylinder, 8-Support base, 9-Third slide groove, 10-Fixing nail, 11-First slider, 12-First limiting groove, 13-Angle measuring component, 1301-Fixing plate, 130 2-Adjusting plate, 1303-Measuring plate, 1304-Sliding ball, 1305-Connecting rod, 14-Fixing assembly, 1401-Sliding plate, 1402-Connecting plate, 1403-Roller, 1404-Second slider, 15-Notch, 16-Elastic element, 17-First scale, 18-Second scale, 19-Third scale, 20-Second limiting groove, 21-Limiting guide rail, 22-Third slider, 23-First magnetic suction element, 24-Second magnetic suction element, 25-Moving rod. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments and accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0051] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility product is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] The following is combined Figures 1-8 This utility model will be described in detail. Example 1

[0053] A device for measuring agronomic traits of crops, such as Figures 1-5As shown, it includes an adjusting rod 1, a guide rail 2, a movable ring 3, and an angle measuring assembly 13.

[0054] The adjusting rod 1 and the guide rail 2 are arranged parallel to each other and connected at their top ends by a first connector 5. At least one movable ring 3 is slidably provided on the guide rail 2 for the plant to pass through. The angle measuring component 13 is slidably provided on the movable ring 3. The movable ring 3 is used to limit the position of the plant.

[0055] The guide rail 2 is provided with a first scale 17, and the height of the plant is measured by raising and lowering the adjusting rod 1 and the guide rail 2.

[0056] In this embodiment, the size of the movable ring 3 is such that the plant can pass through it without damaging the leaves during movement.

[0057] The angle measuring component 13 includes a fixed plate 1301, an adjusting plate 1302, and a measuring plate 1303.

[0058] The adjusting plate 1302 is hinged to one end of the fixed plate 1301 near the inner side of the movable ring 3. The measuring plate 1303 is provided on both sides of the fixed plate 1301, and the measuring plate 1303 is provided with a second scale 18.

[0059] The adjusting rod 1 includes a fixed rod 101, an adjusting ring 102, and a telescopic rod 103.

[0060] The telescopic rod 103 is movably disposed within the fixed rod 101. The upper end of the fixed rod 101 is provided with the adjusting ring 102. The inner wall of the adjusting ring 102 and the outer wall of the telescopic rod 103 are provided with threads that can cooperate with each other. The inner wall of the fixed rod 101 is provided with a limiting guide rail 21 along the axial direction. The lower outer wall of the telescopic rod 103 is provided with a third slider 22. The limiting guide rail 21 and the third slider 22 are slidably engaged.

[0061] The lower end of the adjusting ring 102 is provided with an annular second limiting groove 20, and the side wall of the second limiting groove 20 is provided with an annular first limiting groove 12. The upper outer wall of the fixing rod 101 is provided with a first slider 11. The upper end of the fixing rod 101 is slidably engaged with the second limiting groove 20, and the first slider 11 is slidably engaged with the first limiting groove 12.

[0062] The guide rail 2 includes a fixed guide rail 201 and a telescopic guide rail 202. The telescopic guide rail 202 is movably disposed within the fixed guide rail 201. The upper end of the telescopic guide rail 202 is provided with the first connecting member 5. The other end of the first connecting member 5 is connected to the upper end of the telescopic rod 103. A second connecting member 6 connects the fixed guide rail 201 and the fixed rod 101.

[0063] The telescopic guide rail 202 is provided with a baffle 4 on the side away from the telescopic rod 103.

[0064] The lower end of the fixing rod 101 is provided with a fixing nail 10, and the lower end of the fixing guide rail 201 is provided with a support base 8.

[0065] In this embodiment, two movable rings 3 are provided, located on the fixed guide rail 201 and the telescopic guide rail 202 respectively, thereby limiting the upper and lower ends of the plant. By rotating the adjusting ring 102, the telescopic guide rail 202 is moved until the baffle 4 contacts the plant. The first scale 17 is read as the plant height. The angle between the leaf and the plant is measured by the angle measuring component 13.

[0066] Furthermore, in this embodiment, the first scale 17 is set on the fixed guide rail 201 and the telescopic guide rail 202 for easy reading. The value of the first scale 17 on the fixed guide rail 201 increases from bottom to top, and the value of the first scale 17 on the telescopic guide rail 202 decreases from bottom to top. When the telescopic guide rail 202 is completely inside the fixed guide rail 201, the maximum value of the first scale 17 on the fixed guide rail 201 and the minimum value of the first scale 17 on the telescopic guide rail 202 are the same and correspond to each other. The maximum value of the first scale 17 on the fixed guide rail 201 and the minimum value of the first scale 17 on the telescopic guide rail 202 are the height of the fixed guide rail 201. Simply put, when the telescopic guide rail 202 rises, the value of the first scale 17 on the telescopic guide rail 202 gradually increases from the height of the fixed guide rail 201 until it is the same as the height of the plant. Example 2

[0067] The difference between this embodiment and Embodiment 1 is that, as Figure 5 As shown, a fixing component 14 is also slidably provided on the inner side of the movable ring 3. The fixing component 14 includes a sliding plate 1401, a connecting plate 1402, and a roller 1403.

[0068] The sliding plate 1401 is slidably connected to the two sides of the movable ring 3. A connecting plate 1402 is provided on one side of the sliding plate 1401, and a roller 1403 is provided on the connecting plate 1402. The axial direction of the roller 1403 is perpendicular to the axial direction of the adjusting rod 1 and the guide rail 2. An elastic element 16 is connected between the other side of the sliding plate 1401 and the movable ring 3. The roller 1403 has a groove for left and right positioning of the plant, preventing tilting and further increasing measurement accuracy. In this embodiment, the groove has an arc-shaped cross-section to reduce contact between the roller 1403 and the leaves.

[0069] like Figure 7As shown, the two inner sides of the movable ring 3 are provided with second sliding grooves 302, and the two sides of the sliding plate 1401 are provided with second sliders 1404. The second sliders 1404 are slidably disposed in the second sliding grooves 302, and the elastic element 16 is disposed between the second sliders 1404 and the second sliding grooves 302.

[0070] In this embodiment, when the plant passes through the movable ring 3, the roller 1403 rolls along the surface of the plant. Under the elastic force of the elastic element 16, the roller 1403 squeezes the plant towards the inner wall of the movable ring 3, thereby fixing the plant and keeping it upright, which helps to improve the measurement accuracy. When the plant diameter changes, the energy-absorbing buffer of the elastic element 16 prevents the roller 1403 from crushing the plant. Example 3

[0071] The difference between this embodiment and Embodiment 2 is that, as Figure 6 , Figure 7 As shown, the movable ring 3 is square, and the upper end of the movable ring 3 is provided with a first sliding groove 301. The lower end of the fixed plate 1301 is connected to a sliding ball 1304 through a connecting rod 1305. The sliding ball 1304 is slidably disposed in the first sliding groove 301.

[0072] In this embodiment, the lower end of the fixed plate 1301 is provided with two connecting rods 1305, and the lower ends of the two connecting rods 1305 are connected to sliding balls 1304. The upper surfaces of the two ends adjacent to the guide rail 2 and the upper surface of the end opposite to the guide rail 2 are provided with first sliding grooves 301, which are interconnected. The angle measuring component 13 can move according to the position of the blade, thereby facilitating measurement. Example 4

[0073] The difference between this embodiment and embodiment 3 is that, as Figure 8 As shown, the inner wall of the movable ring 3 is provided with a third scale 19 along the moving direction of the sliding plate 1401. The third scale 19 reflects the distance between the side wall of the sliding plate 1401 and the side wall of the movable ring 3. The diameter of the plant is obtained by subtracting the distance between the side wall of the sliding plate 1401 and the groove on the side away from the sliding plate 1401 from the third scale 19. The third scale 19 is set according to the above calculation method, which can directly reflect the diameter of the plant. Example 5

[0074] The difference between this embodiment and embodiment 4 is that, as Figure 9As shown, the movable ring 3 has a notch on the side away from the guide rail 2, and a movable rod 25 is connected between the notches. A first magnetic suction member 23 is provided on the side of the notch, and a second magnetic suction member 24 is provided on the side of the movable rod 25. The movable rod 25 can be disassembled through the magnetic attraction of the first magnetic suction member 23 and the second magnetic suction member 24. When measuring, the movable rod 25 can be disassembled to facilitate the plant to be placed into the movable ring 3 through the notch, and then the movable rod 25 is magnetically connected to limit the position of the plant.

[0075] The steps for using this utility model are as follows:

[0076] Insert the fixing nail 10 into the ground, support the base 8 on the ground, remove the movable rod 25, place the plant inside the movable ring 3 through the notch of the movable ring 3, and then reconnect the movable rod 25 through the first magnetic suction 23 and the second magnetic suction 24, so that the plant is placed between the movable rod 25 and the fixing component 14, and the plant is placed in the groove on the roller 1403. Rotate the adjusting ring 102 to raise the telescopic rod 103, and drive the first connecting piece 5 to rise, thereby pulling the telescopic guide rail 202 to rise. Move the position of the adjusting ring 102 to make the plant upright. Continuously adjust the adjusting ring 102. When the baffle 4 contacts the top of the plant, read the maximum value of the first scale 17 on the telescopic guide rail 202, which is the plant height.

[0077] When it is necessary to measure the angle between the leaf and the plant, rotate the adjustment plate 1302 until it is parallel to the leaf, or place the leaf on the adjustment plate 1302 and then rotate the adjustment plate 1302 back to the original position of the leaf. Read the rotation angle of the adjustment plate 1302 through the second scale 18, which is the angle between the leaf and the plant.

[0078] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An agricultural crop agronomic trait measuring device, characterized by, It includes an adjusting rod (1), a guide rail (2), a movable ring (3), and an angle measuring assembly (13). The adjusting rod (1) and the guide rail (2) are arranged in parallel and connected at their top ends by a first connector (5). At least one movable ring (3) for the plant to pass through is slidably provided on the guide rail (2). The angle measuring component (13) is slidably provided on the movable ring (3). The movable ring (3) is used to limit the position of the plant. The adjusting rod (1) and / or the guide rail (2) are provided with a first scale (17), and the height of the plant is measured by raising and lowering the adjusting rod (1) and the guide rail (2).

2. The device for measuring an agronomic trait of a crop plant according to claim 1, wherein: The inner side of the movable ring (3) is also provided with a fixing component (14), which includes a sliding plate (1401), a connecting plate (1402) and a roller (1403). The sliding plate (1401) is slidably connected to the two sides of the movable ring (3). The sliding plate (1401) has a connecting plate (1402) on one side, and a roller (1403) is provided on the connecting plate (1402). The axial direction of the roller (1403) is perpendicular to the axial direction of the adjusting rod (1) and the guide rail (2). An elastic element (16) is connected between the other side of the sliding plate (1401) and the movable ring (3).

3. The device for measuring an agronomic trait of a crop plant according to claim 2, wherein, The roller (1403) has a groove.

4. The device for measuring an agronomic trait of a crop plant of claim 2, wherein: The angle measuring component (13) includes a fixed plate (1301), an adjusting plate (1302), and a measuring plate (1303). The adjusting plate (1302) is hinged to one end of the fixed plate (1301) near the inner side of the movable ring (3). The measuring plate (1303) is provided on both sides of the fixed plate (1301), and the measuring plate (1303) is provided with a second scale (18).

5. A device for measuring an agronomic trait of a crop plant according to claim 4, wherein: The movable ring (3) is square. The upper end of the movable ring (3) is provided with a first groove (301). The two inner sides of the movable ring (3) are provided with a second groove (302). The lower end of the fixed plate (1301) is connected to a sliding ball (1304) through a connecting rod (1305). The sliding ball (1304) is slidably disposed in the first groove (301). The two sides of the sliding plate (1401) are provided with a second slider (1404). The second slider (1404) is slidably disposed in the second groove (302). The elastic element (16) is disposed between the second slider (1404) and the second groove (302).

6. A device for measuring an agronomic trait of a crop plant according to any one of claims 1 to 3, wherein: The adjusting rod (1) includes a fixed rod (101), an adjusting ring (102), and a telescopic rod (103). The telescopic rod (103) is movably disposed inside the fixed rod (101). The upper end of the fixed rod (101) is provided with the adjusting ring (102). The inner wall of the adjusting ring (102) and the outer wall of the telescopic rod (103) are provided with threads that can cooperate with each other. The inner wall of the fixed rod (101) is provided with a limiting guide rail (21) along the axial direction. The lower outer wall of the telescopic rod (103) is provided with a third slider (22). The limiting guide rail (21) and the third slider (22) are slidably engaged.

7. A device for measuring an agronomic trait of a crop plant according to claim 6, wherein: The lower end of the adjusting ring (102) is provided with an annular second limiting groove (20), the side wall of the second limiting groove (20) is provided with an annular first limiting groove (12), the upper outer wall of the fixing rod (101) is provided with a first slider (11), the upper end of the fixing rod (101) is slidably engaged with the second limiting groove (20), and the first slider (11) is slidably engaged with the first limiting groove (12).

8. The device for measuring an agronomic trait of a crop plant of claim 6, wherein: The guide rail (2) includes a fixed guide rail (201) and a telescopic guide rail (202). The telescopic guide rail (202) is movably disposed inside the fixed guide rail (201). The first connecting member (5) is provided at the upper end of the telescopic guide rail (202). The other end of the first connecting member (5) is connected to the upper end of the telescopic rod (103). A second connecting member (6) is connected between the fixed guide rail (201) and the fixed rod (101).

9. A device for measuring an agronomic trait of a crop plant according to claim 8, wherein: The telescopic guide rail (202) has a baffle (4) on the side away from the telescopic rod (103).

10. The crop agronomic trait measuring device according to claim 8, characterized in that: The lower end of the fixing rod (101) is provided with a fixing nail (10), and the lower end of the fixing guide rail (201) is provided with a support base (8).

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