Sampling device for plant detection

Abstract

The utility model discloses a sampling device for plant detection, which belongs to the technical field of plant detection and comprises an outer shell, a conveying component, a stamping component, a holding rod component and a sensor, and a gap for leaves to enter is transversely formed in the middle of the outer shell; the conveying assembly is arranged in the outer shell and comprises two sets of conveying belt structures which are arranged in parallel and attached to each other, the attaching faces of the two sets of conveying belt structures coincide with the gap position, and the two sets of conveying belt structures are in transmission connection; the stamping assembly comprises a stamping head and a fixing sleeve which are coaxially arranged, the stamping head is in sliding connection with the upper portion of the outer shell in the vertical direction, a reset spring is arranged between the stamping head and the outer shell, and the fixing sleeve is fixedly connected with the lower portion of the outer shell. According to the sampling device for plant detection, by arranging the conveying assembly, after one-time sampling is completed, leaves can be automatically and accurately controlled to move to the next preset sampling position, and accurate control over the sampling interval is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of plant detection technology, and in particular relates to a sampling device for plant detection. Background Technology

[0002] Plant leaf analysis is a crucial step in modern agriculture, horticulture, and environmental science. By examining plant leaves, we can gain in-depth understanding of key information such as plant growth and development, nutritional status, pest and disease conditions, and photosynthetic capacity. This information is of great significance for improving crop yield and quality, achieving precision agriculture, and ensuring food and ecological security. Leaf sampling typically involves using a punching tool to collect circular samples from different locations on the leaf for analysis.

[0003] Patent CN208091727U discloses a plant sampler, including a shell, a sampling head, a sliding member, and an ejector. The bottom of the shell has a fixing port for fixing the sampling head, and the sampling head has a sampling port for sampling plant tissue. The ejector is disposed inside the shell, and the side of the shell has a groove for the sliding member to slide. One end of the sliding member passes through the groove and is fixedly connected to the ejector. The other end of the sliding member protrudes out of the shell. The ejector is pushed into the sampling port by the sliding member along the groove to push out the sampled tissue.

[0004] In existing blade sampling techniques, the punch directly physically squeezes the blade to achieve sampling. While this method is simple to operate, in practical applications, when the punch acts directly on the blade, the sampling site is easily damaged due to the fragility of the blade tissue. This damage not only disrupts the original tissue structure of the blade but may also affect the distribution and content of chemical components in the sample, thereby reducing the representativeness of the sample. Secondly, blade sampling usually requires equidistant sampling from different points on the blade to obtain representative samples. However, in actual operation, this requirement is often achieved by manually changing the sampling position. Due to the subjectivity and uncertainty of manual operation, the accuracy of the sampling point is often difficult to guarantee. Due to factors such as visual errors and hand tremors, there may still be significant deviations between sampling points. This deviation not only affects the representativeness of the sample but may also introduce additional errors, reducing the reliability of the analysis results.

[0005] To address this issue, we propose a sampling device for plant detection. Utility Model Content

[0006] The purpose of this invention is to solve the problem of large sampling errors in existing leaf sampling devices, and to propose a sampling device for plant detection.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A sampling device for plant detection includes a housing, a conveying assembly, a stamping assembly, a handle assembly, and a sensor, wherein:

[0009] The outer casing has a transverse gap in the middle for the blades to enter;

[0010] The conveying assembly is disposed within the housing and includes two sets of parallel and mutually fitted conveyor belt structures. The mating surfaces and gap positions of the two sets of conveyor belt structures coincide, and the two sets of conveyor belt structures are connected in a transmission manner.

[0011] The stamping assembly includes a stamping head and a fixed sleeve arranged coaxially. The stamping head is slidably connected to the upper part of the outer shell in a vertical direction and a return spring is provided between the outer shells. The fixed sleeve is fixedly connected to the lower part of the outer shell.

[0012] The grip assembly is used to hold and drive the stamping head to slide axially to stamp and sample the blade.

[0013] The sensor is used to detect the movement of the stamping head and control the conveyor belt structure to change the position of the blades.

[0014] Preferably, the conveyor belt structure includes two rotating shafts, which are connected by two friction belts, and the punch head and the fixed sleeve are located between the two friction belts.

[0015] Preferably, a gear is fixedly mounted on the rotating shaft, and the gears on the same side of the two sets of conveyor belt structures mesh with each other. One of the rotating shafts is fixedly connected to the output shaft of a servo motor fixedly mounted on the housing, and the servo motor is electrically connected to the sensor.

[0016] Preferably, the sensor includes a transmitter and a receiver, and the line connecting the transmitter and receiver is located on the movement path of the stamping head.

[0017] Preferably, the outer diameter of the stamping head is adapted to the inner diameter of the fixed sleeve, and both the stamping head and the fixed sleeve have chamfers at their opposite ends.

[0018] Preferably, the grip assembly includes a handle fixedly mounted on the side of the housing away from the gap, and a pressing rod is hinged to the end of the handle, the end of the pressing rod being movably connected to the stamping head.

[0019] Preferably, the top of the stamping head is provided with a pressing column, the end of the pressing rod is provided with a pressing groove, and the pressing column is located in the pressing groove and abuts against the inner wall of the pressing groove.

[0020] In summary, the technical effects and advantages of this utility model are as follows: This sampling device for plant testing uses a combination of a punch head and a fixed sleeve to apply pressure only to the outline of the leaf sampling area during the sampling process, effectively limiting the stress area and avoiding leaf tissue damage caused by comprehensive compression in traditional sampling methods.

[0021] This plant testing sampling device, through the setting of a conveying component, can automatically and precisely control the movement of leaves to the next predetermined sampling position after one sampling is completed. This achieves precise control of the sampling interval, eliminates errors caused by manual operation, and ensures that each sampling is carried out according to the preset equidistant requirements, thereby greatly improving the representativeness of the samples. By automatically controlling the sampling interval, more consistent and reliable sample data can be collected. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0024] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0025] Figure 4 This is a schematic diagram of the conveyor belt structure in this utility model.

[0026] In the diagram: 1. Outer shell; 11. Gap; 2. Transmission assembly; 21. Shaft; 22. Friction belt; 23. Gear; 3. Stamping assembly; 31. Stamping head; 32. Fixed sleeve; 33. Return spring; 34. Pressing post; 4. Handle assembly; 41. Handle; 42. Pressing rod; 43. Pressing groove; 5. Sensor; 6. Servo motor. Detailed Implementation

[0027] Reference Figure 1-4 A sampling device for plant detection includes an outer shell 1, a conveying assembly 2, a stamping assembly 3, a handle assembly 4, and a sensor 5.

[0028] The outer shell 1 has a transverse gap 11 in the middle for the blade to enter. The outer shell 1 is integrally formed and has a thin shell structure. It is operated by the handle assembly 4 during use.

[0029] The conveying assembly 2 is housed within the outer casing 1 and includes two sets of parallel and closely fitted conveyor belt structures. The contact surfaces of the two sets of conveyor belt structures coincide with the gap 11. The two sets of conveyor belt structures are connected by a drive mechanism and move in opposite directions. The blade to be sampled enters from one end of the gap 11 and is clamped by the two sets of conveyor belt structures. After completing one stamping sampling, the blade is driven by the drive belt structure to move a certain distance and then sampled again. The automatic and precise control of the blade's movement to the next predetermined sampling position achieves precise control of the sampling interval, eliminates errors caused by manual operation, and ensures that each sampling is carried out according to the preset equidistant requirements, thereby greatly improving the representativeness of the sample.

[0030] The conveyor belt structure includes two rotating shafts 21, which are rotatably mounted on the outer casing 1 and are arranged parallel to each other. The two rotating shafts 21 are connected by two friction belts 22. When one of the rotating shafts 21 rotates, it drives the friction belt 22 to move and drives the other rotating shaft 21 to rotate. The movement of the friction belt 22 will cause the blades to change position.

[0031] Reference Figure 3 The stamping assembly 3 includes a stamping head 31 and a fixed sleeve 32 arranged coaxially. The gripping rod assembly 4 is used to grip and drive the stamping head 31 to slide axially to stamp and sample the blade. The stamping head 31 is slidably connected to the upper part of the outer shell 1 in the vertical direction and a return spring 33 is provided between the outer shell 1. The fixed sleeve 32 is fixedly connected to the lower part of the outer shell 1. The blade is located between the stamping head 31 and the fixed sleeve 32. By pressing the gripping rod assembly 4, the stamping head 31 is driven to approach the fixed sleeve 32 until the stamping head 31 is inserted into the fixed sleeve 32, realizing one stamping sampling. The elastic force of the return spring 33 can make the stamping head 31 automatically reset and detach from the blade after sampling. By using the cooperation of the stamping head 31 and the fixed sleeve 32, pressure is applied only to the contour of the blade sampling range during the sampling process, effectively limiting the force area and avoiding blade tissue damage caused by comprehensive compression in traditional sampling methods.

[0032] The stamping head 31 and the fixed sleeve 32 are located between the two friction belts 22. After the friction belts 22 drive the blade to change position, the position of the blade relative to the stamping head 31 also changes. When sampling again, blade samples at different positions can be obtained.

[0033] Reference Figure 2-4A gear 23 is fixedly installed on the rotating shaft 21. The gears 23 on the same side of the two sets of conveyor belt structures mesh with each other. Through the meshing of the gears 23, when the rotating shaft 21 rotates, the rotating shaft 21 on the other set of conveyor belt structures can rotate in the opposite direction, so that the two sets of conveyor belt structures can run in opposite directions. One of the rotating shafts 21 is fixedly connected to the output shaft of the servo motor 6 fixedly installed on the outer shell 1. The servo motor 6 is electrically connected to the sensor 5. The servo motor 6 is used to drive the rotating shaft 21 to rotate, so that the friction belt 22 conveys the blades. The conveying distance can be adjusted by controlling the number of rotations of the servo motor 6.

[0034] Sensor 5 is used to detect the movement of the stamping head 31 and control the conveyor belt structure to change the position of the blades. The servo motor 6 is controlled by sensor 5. The control system between the servo motor 6 and sensor 5 is a conventional technology in the field of communication circuits and will not be described in detail here. Sensor 5 controls the rotation of servo motor 6 by detecting the movement of stamping head 31. After stamping head 31 completes one stamping sampling, sensor 5 outputs a command to control servo motor 6 to rotate a certain number of revolutions. Sensor 5 is an infrared sensor, which includes a transmitter and a receiver. The connection between the transmitter and receiver is located on the movement path of stamping head 31. When stamping head 31 is stamping and sampling, stamping head 31 will cut off the infrared signal emitted by the transmitter. When stamping head 31 is reset, receiver receives infrared signal again. At this time, it outputs control command to servo motor 6 to make servo motor 6 rotate a specified number of revolutions.

[0035] The outer diameter of the punch head 31 is adapted to the inner diameter of the fixed sleeve 32, and both the punch head 31 and the fixed sleeve 32 have chamfers at their opposite ends. The chamfers help to increase the punching pressure when punching the blade, ensuring rapid cutting of the blade. During punching, the punch head 31 enters the fixed sleeve 32 and squeezes the sample out from below the fixed sleeve 32. A connection interface for connecting the sampling tube is provided below the fixed sleeve 32. The sampling tube is connected to the connection interface, and the sample falls directly into the sampling tube, thereby reducing direct contact with the sample, reducing the risk of sample contamination, and ensuring the accuracy of sample detection.

[0036] Reference Figure 2-4 The grip assembly 4 includes a handle 41 fixedly installed on the side of the housing 1 away from the gap 11. A pressing rod 42 is hinged to the end of the handle 41. The end of the pressing rod 42 is movably connected to the stamping head 31. By holding the handle 41 and applying force to the pressing rod 42, the stamping head 31 can be driven to move downward to achieve stamping.

[0037] The top of the stamping head 31 is provided with a pressing post 34, and the end of the pressing rod 42 is provided with a pressing groove 43. The pressing post 34 is located in the pressing groove 43 and abuts against the inner wall of the pressing groove 43. Since the movement trajectory of the movable end of the pressing rod 42 is arc-shaped and the stamping head 31 moves vertically in the longitudinal direction, the pressing groove 43 and the pressing post 34 cooperate to compensate for the position deviation of the pressing rod 42 during the movement, ensuring that the pressing rod 42 and the stamping head 31 will not interfere with each other.

[0038] The working principle of this utility model is as follows:

[0039] In use, the sampling tube is connected to the connection interface, and the blade to be sampled enters from one end of the gap 11. It is held by two sets of conveyor belt structures. By holding the handle 41 and applying force to the pressing rod 42, the punch head 31 can be driven to move downward to achieve punching. During punching, the punch head 31 will enter the fixed sleeve 32 and squeeze the sample out from below the fixed sleeve 32. The sample will fall directly into the sampling tube.

[0040] When the stamping head 31 is stamping and sampling, the stamping head 31 will cut off the infrared signal emitted by the transmitting end. When the stamping head 31 is reset, the receiving end will receive the infrared signal again. At this time, the receiving end will output a control command to the servo motor 6, causing the servo motor 6 to rotate a specified number of revolutions, driving the rotating shaft 21 to rotate, so that the two sets of transmission belt structures can run in opposite directions. After the blade is driven to move a certain distance through the transmission belt structure, sampling is performed again. The blade is automatically and accurately controlled to move to the next predetermined sampling position, realizing precise control of the sampling interval and eliminating the error caused by manual operation.

Claims

1. A sampling device for plant detection, comprising a housing (1), a conveying assembly (2), a stamping assembly (3), a handle assembly (4), and a sensor (5), characterized in that, in: The outer shell (1) has a transverse gap (11) in the middle for the blade to enter. The conveying component (2) is disposed inside the outer shell (1) and includes two sets of parallel and mutually attached conveyor belt structures. The contact surfaces of the two sets of conveyor belt structures coincide with the gap (11) and the two sets of conveyor belt structures are connected in a transmission manner. The stamping assembly (3) includes a stamping head (31) and a fixed sleeve (32) arranged coaxially. The stamping head (31) is slidably connected to the upper part of the outer shell (1) in the vertical direction and a return spring (33) is provided between the outer shell (1). The fixed sleeve (32) is fixedly connected to the lower part of the outer shell (1). The grip assembly (4) is used to grip and drive the stamping head (31) to slide axially to stamp and sample the blade; The sensor (5) is used to detect the movement of the punch head (31) and control the conveyor belt structure to change the position of the blades.

2. The sampling device for plant detection according to claim 1, characterized in that, The conveyor belt structure includes two rotating shafts (21), which are connected by two friction belts (22). The punch head (31) and the fixed sleeve (32) are located between the two friction belts (22).

3. A sampling device for plant detection according to claim 2, characterized in that, A gear (23) is fixedly installed on the shaft (21). The gears (23) on the same side of the two sets of conveyor belt structures mesh with each other. One of the shafts (21) is fixedly connected to the output shaft of the servo motor (6) fixedly installed on the outer casing (1). The servo motor (6) is electrically connected to the sensor (5).

4. A sampling device for plant detection according to claim 1, characterized in that, The sensor (5) includes a transmitter and a receiver, and the line connecting the transmitter and receiver is located on the movement path of the stamping head (31).

5. A sampling device for plant detection according to claim 1, characterized in that, The outer diameter of the stamping head (31) is adapted to the inner diameter of the fixed sleeve (32), and both the stamping head (31) and the fixed sleeve (32) have chamfers at their opposite ends.

6. A sampling device for plant detection according to claim 1, characterized in that, The grip assembly (4) includes a grip (41) fixedly mounted on the side of the housing (1) away from the gap (11), and a pressing rod (42) is hinged to the end of the grip (41), and the end of the pressing rod (42) is movably connected to the punch head (31).

7. A sampling device for plant detection according to claim 6, characterized in that, The top of the punch head (31) is provided with a pressing column (34), and the end of the pressing rod (42) is provided with a pressing groove (43). The pressing column (34) is located in the pressing groove (43) and abuts against the inner wall of the pressing groove (43).

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