A soybean kernel image acquisition and measurement device based on laser calibration

Abstract

The utility model provides a kind of soybean kernel image acquisition measuring device based on laser calibration, comprising: base;Vertical adjusting column, movably set on the base;Horizontal mounting rod, movably set on the vertical adjusting column;Vertical sliding sleeve, movably sleeved on the vertical adjusting column;Horizontal sliding sleeve, movably sleeved on the horizontal mounting rod;First laser transmitter, fixed on the horizontal mounting rod;Second laser transmitter, fixed on the vertical sliding sleeve;The vertical adjusting column and the horizontal mounting rod are provided with length scale line, and with the intersection of the vertical adjusting column and the horizontal mounting rod as measurement origin.This application device can improve the consistency of shooting range, scale relationship and shooting height reference when collecting different batches of soybean kernel images compared with artificial temporary scribe, visual adjustment or simple tape measurement.

Description

Technical Field

[0001] This utility model relates to the field of laser measurement, and in particular to a soybean seed image acquisition and measurement device based on laser calibration. Background Technology

[0002] Soybean kernel defect detection is a crucial step in the intelligent selection and quality grading of soybeans. To train and validate the visual detection model, a large number of soybean kernel images are typically acquired on conveyor belts, sample stages, or background boards. Image quality, shooting height, field of view, and consistency of the acquisition area boundaries directly impact dataset quality and subsequent model training effectiveness.

[0003] In current soybean seed image acquisition processes, cameras are typically mounted above a conveyor belt or sample area, secured by a camera bracket or existing image acquisition platform. However, the length, width, center position, boundary range of the effective imaging area of ​​the conveyor belt, as well as the distance from the camera to the acquisition surface, can easily vary between different batches. Without a standardized calibration structure, this can easily lead to problems such as inconsistent image scale, unstable boundary positions, and inconsistent sample coverage.

[0004] Traditional methods rely heavily on manual visual inspection, temporary marking, or tape measure measurement to determine the sampling area, which is inconvenient and difficult to maintain stable reproduction in scenarios involving continuous sampling on conveyor belts, dense distribution, or obstruction. Therefore, it is necessary to provide a laser calibration device that can be placed beside the conveyor belt or sample area and used in conjunction with an external main image acquisition camera above it. This device can be used to assist in determining the boundaries, width, length, center line, scale reference, and shooting height reference of the soybean seed image acquisition area from the external main image acquisition camera to the acquisition plane. Utility Model Content

[0005] To solve at least one of the above problems, this utility model provides a soybean seed image acquisition and measurement device based on laser calibration, comprising: Base; The vertically adjustable column is movably mounted on the base; A horizontal mounting rod is movably mounted on the vertical adjusting column; A vertical sliding sleeve is movably fitted onto the vertical adjusting column; A transverse sliding sleeve is movably fitted onto the transverse mounting. The first laser emitter is fixed on the horizontal mounting rod; The second laser emitter is fixed on the vertical sliding sleeve; The vertical adjustment column and the horizontal mounting rod are provided with length scale lines, and the intersection of the vertical adjustment column 5 and the horizontal mounting rod is taken as the measurement origin.

[0006] Furthermore, the base includes: Cube frame; Two support rings are fixed to the side posts on both sides of the upper surface of the cube frame, respectively; A rotatable transversely perforated sleeve is inserted into the two support rings, and the rotatable transversely perforated sleeve is provided with a rectangular insertion hole. Furthermore, the vertical adjustment column is provided with multiple protruding limiting ribs, the length of which is greater than half the length of the short side of the rectangular socket and less than half the length of the long side of the rectangular socket.

[0007] Furthermore, the laser-calibrated soybean seed image acquisition and measurement device also includes: A vertical laser emitter support groove, wherein the second laser emitter is disposed in the vertical laser emitter support groove, and the vertical laser emitter support groove is fixed on the vertical sliding sleeve; A transverse laser emitter support slot is provided, wherein the first laser emitter is disposed within the transverse laser emitter support slot, and the transverse laser emitter support slot is fixed to the transverse mounting rod.

[0008] Furthermore, the laser-calibrated soybean seed image acquisition and measurement device also includes: Vertical locking screws are used to secure the vertical sliding sleeve. The transverse locking screw is used to secure the transverse sliding sleeve.

[0009] Furthermore, the laser-calibrated soybean seed image acquisition and measurement device also includes: At least two inclined support rods, one end of each of which is hinged to the vertical adjusting column.

[0010] Furthermore, at least two of the inclined support rods have an included angle of 90 degrees in the horizontal direction.

[0011] Furthermore, the laser-calibrated soybean seed image acquisition and measurement device also includes: An image acquisition device is mounted on the horizontal mounting rod.

[0012] Furthermore, the laser-calibrated soybean seed image acquisition and measurement device also includes: An angle measuring device is installed on the vertical adjustment column, and the angle measuring device measures the included angle between the vertical adjustment column and the horizontal mounting rod.

[0013] Furthermore, the angle measuring device is an angle scale line engraved on the surface of the vertical adjustment column.

[0014] The above solution achieves the following beneficial technical effects: 1. By illuminating different boundaries or reference positions of the acquisition area with the first laser emitter and the second laser emitter respectively, the field of view of the camera, the length of the acquisition area, the width of the acquisition area, the boundary position, and the shooting height reference of the external main image acquisition camera to the acquisition plane can be determined.

[0015] 2. Compared with manual temporary marking, visual adjustment or simple tape measure measurement, this device can improve the consistency of the shooting range, scale relationship and shooting height reference when acquiring images of different batches of soybean seeds. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the soybean seed image acquisition and measurement device based on laser calibration in this application.

[0017] The attached figures are labeled as follows: 1. Bottom rectangular frame 2 support rings 3 Rotatable transverse perforated sleeve 4 rectangular sockets 5 Vertical Adjustable Columns 6 limiting ribs 7. Double-ring hinged support structure 8 diagonal support rods 9 Horizontal Mounting Rods 10 Lateral sliding sleeve 11 Horizontal Laser Emitter Support Slot 12 Horizontal Locking Screws 13 Vertical sliding sleeve 14 Vertical Laser Emitter Support Slots 15 First Laser Emitter 16 Second laser emitter 17 Measurement origin 18X axis 19Y axis 20 Image Acquisition Devices Detailed Implementation The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] Please refer to Figure 1In one embodiment of this utility model, the soybean seed image acquisition and measurement device based on laser calibration includes a cubic frame and a support ring 2 forming the base, a rotatable horizontally perforated sleeve 3, a vertically adjusting column 5, a limiting rib 6, an inclined support rod 8, a double-ring hinged support structure 7, a horizontal mounting rod 9, a horizontally sliding laser measurement component, a vertically sliding laser measurement component, a first laser emitter 15, a second laser emitter 16, and an image acquisition device 20. Specifically, the cubic frame is a bottom cuboid frame 1. The bottom cuboid frame 1 supports the main body of the equipment and allows the device to be stably positioned near the conveyor belt, sample stage, or background plate. Support rings 2 are located on both sides of the top of the bottom cuboid frame 1. Rotatable horizontally perforated sleeves 3 are inserted into the two support rings 2, and rectangular insertion holes 4 are formed on the rotatable horizontally perforated sleeves 3. A vertical adjustment column 5 is inserted into the rectangular insertion hole 4, and multiple limiting ribs 6 are provided on the outer wall of the vertical adjustment column 5. Height adjustment and locking positioning can be achieved by rotating the vertical adjustment column 5.

[0019] The vertical adjustment column 5 is stabilized by two inclined support rods 8, which are arranged in the front and side directions respectively, with an angle of approximately 90° between their ground projections. They are connected to the vertical adjustment column 5 through a double-ring hinged support structure 7, so that the device remains stable when used beside the conveyor belt or near the sample area.

[0020] A vertical adjustment column 5 is movably mounted on a base, with a horizontal mounting rod 9 connected to its upper part. The horizontal mounting rod 9 is movably mounted on the vertical adjustment column 5, and the intersection of the two serves as the measurement origin 17. The direction of the horizontal mounting rod 9 serves as the X-axis 18, and the direction of the vertical adjustment column 5 serves as the Y-axis 19. The horizontal sliding laser measurement assembly moves left and right along the horizontal mounting rod 9 to drive the first laser emitter 15 to illuminate the left and right boundaries, center line, or scale reference position of the acquisition area. The vertical sliding laser measurement assembly moves up and down along the vertical adjustment column 5 to support the second laser emitter 16, which illuminates the other boundary, height reference position, distance reference position, or shooting height reference position of the acquisition area. The emission direction of the second laser emitter 16 can be the same as that of the first laser emitter 15 or adjusted according to the boundary calibration requirements of the acquisition area. The two laser emitters can be used respectively for the calibration of different boundaries, center lines, height reference positions, distance reference positions, or shooting height reference positions.

[0021] The equipment also includes an image acquisition device 20. The image acquisition device 20 can be positioned on the vertical adjustment column 5, horizontal mounting rod 9, horizontal sliding sleeve 10, vertical sliding sleeve 13, or other suitable locations within the overall device. It is used to hold a mobile image acquisition terminal, a portable camera, or a small imaging module. By adjusting the direction and installation position of the support, it can acquire images of the phenotypic information of field crops such as soybeans, rice, and wheat. In this embodiment, the image acquisition device 20 is used to assist in acquiring soybean grain images, recording laser calibration status, or observing the acquisition area. The external main image acquisition camera can be installed on an independent camera bracket above the conveyor belt, sample stage, or background plate, or on an existing image acquisition platform, to acquire images of soybean grains from the main perspective. This device is positioned beside the acquisition area and, through laser illumination and scale reading, assists in calibrating the field of view of the external main image acquisition camera, the boundary of the acquisition area, the length and width of the acquisition area, the scale reference, and the shooting height reference from the external main image acquisition camera to the acquisition plane.

[0022] During calibration, the first laser emitter 15 can illuminate the left and right boundaries, center line, or scale reference position of the conveyor belt or sample area. By reading the scale on the horizontal mounting rod 9, the lateral position of the corresponding boundary or reference point can be obtained, thereby assisting in determining the acquisition width, lateral boundary, and center position in the camera's field of view. During calibration, the second laser emitter 16 can illuminate the longitudinal boundary, height reference position, distance reference position, scale reference position, or shooting height reference position of the acquisition area. By reading the scale on the vertical adjustment column 5, the height or position reference of the corresponding reference point can be obtained, thereby assisting in determining the length of the acquisition area, the camera's field of view, the distance reference to the acquisition surface, or the shooting height reference from the external main image acquisition camera to the acquisition plane.

[0023] When used for collecting datasets for soybean seed defect detection, soybean seeds can be placed on a conveyor belt, sample stage, or black background plate; the external main image acquisition camera is responsible for acquiring images from the main viewpoint, and the image acquisition device 20 on this device can be used to assist in acquisition or record calibration status. The first laser emitter 15 and the second laser emitter 16 in this device are used to assist in determining the shooting center, acquisition boundary, length and width of the acquisition area, scale reference position, and shooting height reference from the external main image acquisition camera to the acquisition plane, thereby improving the positional consistency during image acquisition and the convenience of subsequent data annotation.

[0024] In one embodiment of this application, the bottom cuboid frame 1 is formed by welding steel pipes, with dimensions of approximately 50 cm × 40 cm × 40 cm. It supports the entire device and serves as the foundation for the vertical adjustment structure and the diagonal support structure. Support rings 2 are fixedly installed on both sides of the top of the bottom cuboid frame 1, and a rotatable horizontally perforated sleeve 3 passes between the two support rings 2. A rectangular insertion hole 4 is provided on the wall of the rotatable horizontally perforated sleeve 3, and the vertical adjustment column 5 is inserted into the rectangular insertion hole 4. Multiple limiting ribs 6 are spaced axially along the outer wall of the vertical adjustment column 5. The limiting ribs 6 cooperate with the rectangular insertion hole 4 to achieve height adjustment and locking of the vertical adjustment column 5.

[0025] The diameter of the two support rings 2 is approximately 7 cm. A rotatable transversely perforated sleeve 3 with a diameter of approximately 5 cm is inserted between the two support rings 2.

[0026] The rotatable horizontally perforated sleeve 3 is not directly welded to the bottom cuboid frame 1, but is inserted into the two support rings 2. When the vertical adjustment column 5 is not inserted, the rotatable horizontally perforated sleeve 3 can rotate 360° around its own axis; when the vertical adjustment column 5 is inserted, due to the restriction of the vertical adjustment column 5 and the surrounding structure, the rotation range of the rotatable horizontally perforated sleeve 3 is less than 180°.

[0027] A rectangular insertion hole 4 is provided on the wall of the rotatable horizontally perforated sleeve 3. This rectangular insertion hole 4 is not a square hole, and is used for the vertical adjustment column 5 to be inserted, and cooperates with the limiting rib 6 on the vertical adjustment column 5 to realize lifting and locking positioning.

[0028] In one embodiment of this application, two sets of double-ring hinged support structures 7 are provided in the upper middle part of the vertical adjustment column 5. The two sets of double-ring hinged support structures 7 are staggered along the axial direction of the vertical adjustment column 5. Each set of double-ring hinged support structures 7 is connected to an inclined support rod 8. The two inclined support rods 8 are located in the front direction and the side direction, respectively, and the angle between their projections on the ground is approximately 90°. The distal end of the inclined support rod 8 is a flat-mouthed steel pipe end, which is inserted obliquely into the ground during use to support the vertical adjustment column 5 and keep it vertical.

[0029] In one embodiment of this application, a horizontally connecting horizontal mounting rod 9 is provided at the upper part of the vertical adjustment column 5, and the intersection of the horizontal mounting rod 9 and the vertical adjustment column 5 serves as the measurement origin 17. A horizontal sliding sleeve 10 is fitted onto the horizontal mounting rod 9, and a horizontal laser emitter support groove 11 is fixedly connected to the horizontal sliding sleeve 10. A first laser emitter 15 is placed in the horizontal laser emitter support groove 11. A horizontal locking screw 12 is provided on the horizontal sliding sleeve 10 to lock the horizontal sliding sleeve 10, so that the first laser emitter 15 maintains horizontal emission.

[0030] In one embodiment of this application, a vertical sliding sleeve 13 is fitted onto the vertical adjusting column 5 at a position above the measurement origin 17. A vertical laser emitter support groove 14 is fixedly connected to the vertical sliding sleeve 13. The vertical laser emitter support groove 14 is parallel to the horizontal laser emitter support groove 11, and both are used to enable the laser emitter to emit horizontally. A second laser emitter 16 is placed inside the vertical laser emitter support groove 14. A horizontal locking screw 12 is also provided on the vertical sliding sleeve 13 to adjust and fix the height of the second laser emitter 16.

[0031] The horizontal mounting rod 9 has a diameter of approximately 3 cm and a length of approximately 1 m, forming a cross-like structure with the vertical adjustment column 5. The direction of the horizontal mounting rod 9 is designated as the X-axis 18, and the direction of the vertical adjustment column 5 is designated as the Y-axis 19.

[0032] A transverse sliding sleeve 10 is fitted onto the transverse mounting rod 9. The transverse sliding sleeve 10 has a diameter of about 5 cm and a length of about 20 cm, and can slide left and right along the transverse mounting rod 9.

[0033] A section of steel pipe, longitudinally cut in half, is welded to the transverse sliding sleeve 10, forming a transverse laser emitter support groove 11. This transverse laser emitter support groove 11 is approximately 20 cm long and is T-shaped welded to the transverse sliding sleeve 10. A first laser emitter 15 is placed within this transverse laser emitter support groove 11 and emits laser light horizontally.

[0034] Because the transverse laser emitter support groove 11 is prone to rotating downwards under the influence of gravity, causing the laser emitter to be unable to remain horizontal, holes are drilled in the transverse sliding sleeve 10 and transverse locking screws 12 are installed. By tightening the transverse locking screws 12, the transverse sliding sleeve 10 and its welded transverse laser emitter support groove 11 can be fixed, keeping the transverse laser emitter support groove 11 parallel to the ground; after loosening the transverse locking screws 12, the transverse sliding sleeve 10 can move left and right along the transverse mounting rod 9.

[0035] The vertical adjustment column 5 is a steel pipe with a diameter of about 3 cm and a length of about 1.5 m. The vertical adjustment column 5 is inserted into the rectangular insertion hole 4 on the rotatable horizontally perforated sleeve 3.

[0036] Several short steel bars are welded to one side of the vertical adjustment column 5 as limiting bars 6. These limiting bars 6 are made by cutting a long steel bar into several equal-length segments and welding them to the outer wall of the vertical adjustment column 5. In the current embodiment, there are a total of 9 limiting bars 6, with an adjacent limiting bar 6 spaced about 5 cm apart, and the distance between the uppermost limiting bar 6 and the lowermost limiting bar 6 is about 40 cm.

[0037] After the vertical adjustment column 5 is inserted into the rectangular socket 4, it can be unlocked and locked by rotating it. Specifically, when the vertical adjustment column 5 is rotated to a certain angle, the limiting rib 6 can avoid the rectangular socket 4, allowing the vertical adjustment column 5 to move up and down. After the height is adjusted to the appropriate position, rotating the vertical adjustment column 5 by about 90° will cause the limiting rib 6 to lock into the rectangular socket 4 or the edge of the pipe wall, thus locking the height. After rotating it by about 90° again, the locking can be released and the vertical adjustment can continue.

[0038] Each inclined support rod 8 has a diameter of approximately 3 cm and a length of approximately 1.6 m. Both inclined support rods 8 are used to adjust and maintain the verticality of the vertical adjustment column 5, improving the stability of the equipment during the measurement process.

[0039] The two diagonal support rods 8 are not welded to the vertical adjusting column 5, but are connected to the vertical adjusting column 5 through a double-ring hinged support structure 7. Both diagonal support rods 8 are connected near the upper middle part of the vertical adjusting column 5, but the two connection points are slightly misaligned in height. This arrangement is to avoid interference between the support rings 2 of the two T-shaped diagonal support rods 8 at the same height and to facilitate welding and rotation.

[0040] Two diagonal support rods 8 are arranged in different directions, one in the front direction and the other in the side direction. The angle between the projections of the two diagonal support rods 8 on the ground is approximately 90°. The ends of the two diagonal support rods 8 away from the vertical adjusting column 5 are flat steel pipe ends, which are directly inserted into the ground at an angle for support during use. They are not pointed and are not connected to the bottom cuboid frame 1.

[0041] Each inclined support rod 8 is connected to the vertical adjusting column 5 using a double-ring hinged support structure 7. This structure includes an outer support ring and an inner support ring. The outer support ring has a diameter of approximately 5 cm and is welded to the vertical adjusting column 5. The outer support ring has side openings to provide clearance for the inclined support rod 8 to swing up and down.

[0042] The inner support ring has a diameter of approximately 3 cm and is fitted inside the outer support ring. The inner support ring itself has no holes and is welded perpendicularly to the steel pipe of the inclined support rod 8 at a 90° angle, forming a T-shaped structure with the inner support ring. Because the inner support ring is fitted inside the outer support ring, and the outer support ring has clearance holes on its side, the inclined support rod 8 can swing up and down relative to the vertical adjusting column 5, thus facilitating the adjustment of the support angle and keeping the vertical adjusting column 5 vertical.

[0043] The image acquisition device 20 is used to support a mobile image acquisition terminal, a portable camera, or a small imaging module. It can be installed on the vertical adjustment column 5, the horizontal mounting rod 9, the horizontal sliding sleeve 10, the vertical sliding sleeve 13, or other suitable positions of the entire device. The bracket can be connected to the main body of the device by clamping, snapping, or bolting, so that the image acquisition terminal can remain stable at a set height, set angle, and set direction.

[0044] The image acquisition device 20 is not limited to a specific crop and can be used to acquire phenotypic images of field crops such as soybeans, rice, and wheat. The data collected can include crop plant type, canopy, leaves, ears, pods, seedling growth, seed sample appearance, and defect phenotypes. By adjusting the height of the vertical adjustment column 5, the position of the horizontal mounting rod 9, and the angle of the phenotypic acquisition bracket, relatively stable and repeatable phenotypic images can be obtained in field or indoor sample collection environments.

[0045] When used for crop sample or seed defect image acquisition, the bottom cuboid frame 1 can serve as a supporting base for the sample area or background plate, or it can be used in conjunction with an external sample stage, conveyor belt or black background plate; the image acquisition device 20 is used to fix the image acquisition terminal, and the laser emitter can serve as an auxiliary calibration tool for the shooting center, boundary position or scale reference, thereby improving the positional consistency and subsequent data annotation convenience during the phenotypic image acquisition process.

[0046] A vertical sliding sleeve 13 is also fitted onto the vertical adjusting column 5. The vertical sliding sleeve 13 is located on the upper part of the vertical column above the intersection area of ​​the cross and can move up and down along the vertical adjusting column 5. The vertical sliding sleeve 13 has a diameter of about 5 cm and a length of about 20 cm.

[0047] A section of steel pipe, longitudinally cut in half, is welded to the vertical sliding sleeve 13, forming a vertical laser emitter support groove 14. This vertical laser emitter support groove 14 is approximately 20 cm long, horizontal in shape, and forms an L-shape with the vertical sliding sleeve 13. A second laser emitter 16 is placed within this vertical laser emitter support groove 14 and emits laser light horizontally.

[0048] The second laser emitter 16 emits in the same direction as the first laser emitter 15, and the two U-shaped laser support slots are parallel to each other.

[0049] The vertical sliding sleeve 13 is also equipped with a vertical locking screw. When the vertical locking screw is loosened, the vertical sliding sleeve 13 can move up and down along the vertical adjusting column 5; after adjusting to a suitable height, tightening the vertical locking screw can fix the vertical sliding sleeve 13 and the vertical laser emitter bearing groove 14, so that the second laser emitter 16 remains stable.

[0050] In use, first place the bottom cuboid frame 1 on the ground, and insert the two diagonal support rods 8 diagonally into the ground from the front and side directions respectively. Adjust the angle of the diagonal support rods 8 through the double-ring hinge support structure 7 to keep the vertical adjustment column 5 vertical. Then, according to the height of the deer and the measurement position, rotate the vertical adjustment column 5 to disengage the limiting rib 6 and adjust it up and down. After adjusting to a suitable height, rotate the vertical adjustment column 5 again to lock the limiting rib 6 into the rectangular insertion hole 4 to achieve height locking.

[0051] Then, loosen the transverse locking screw 12 on the transverse sliding sleeve 10, allowing the transverse sliding sleeve 10 to move left and right along the transverse mounting rod 9 until the horizontal laser emitted by the first laser emitter 15 illuminates the left boundary, right boundary, center line, or scale reference position of the acquisition area. Read the scale on the transverse mounting rod 9 with the measurement origin 17 as the reference to obtain the horizontal projected distance X.

[0052] Simultaneously, loosen the vertical locking screw on the vertical sliding sleeve 13, allowing the vertical sliding sleeve 13 to move up and down along the vertical adjusting column 5 until the horizontal laser emitted by the second laser emitter 16 illuminates the other boundary, height reference position, distance reference position, or shooting height reference position of the acquisition area. Read the scale on the vertical adjusting column 5 with the measurement origin 17 as the reference to obtain the vertical projected distance Y. If higher accuracy is required, a measuring tape can be used to verify the position of the sliding sleeve.

[0053] In use, first place the bottom cuboid frame 1 near the conveyor belt, sample stage, or background plate. Support the two diagonal support rods 8 from the front and side directions respectively, and adjust the angle of the diagonal support rods through the double-ring hinge support structure to keep the vertical adjustment column 5 stable. Then, according to the height of the conveyor belt, the location of the acquisition area, and the field of view of the camera, rotate the vertical adjustment column 5 to disengage the limiting rib 6 and adjust it up and down. After adjusting to a suitable height, rotate the vertical adjustment column 5 again to lock the limiting rib 6 into the rectangular insertion hole 4, thus achieving height locking.

[0054] Then, loosen the T-shaped locking screw on the transverse sliding sleeve 10, allowing the transverse sliding sleeve 10 to move left and right along the transverse mounting rod 9. Adjust the projection position of the first laser emitter 15 so that it illuminates the left boundary, right boundary, center line, or dimensional reference position of the conveyor belt or sample area. By reading the scale on the transverse mounting rod 9, the transverse position of the corresponding boundary or reference point can be obtained.

[0055] Simultaneously, loosen the T-shaped locking screw on the vertical sliding sleeve 13, allowing the vertical sliding sleeve 13 to move up and down along the vertical adjusting column 5, adjusting the projection position of the second laser emitter 16 so that it illuminates the other boundary, height reference position, distance reference position, scale reference position, or shooting height reference position of the acquisition area. By reading the scale on the vertical adjusting column 5, the other boundary, height, distance, or shooting height reference value of the acquisition area from the external main image acquisition camera to the acquisition plane can be obtained.

[0056] Through the above calibration process, the length, width, centerline, boundary position, scale reference, and shooting height reference of the acquisition area corresponding to the field of view of the external main image acquisition camera can be determined. When the camera acquires images of soybean seeds, it can maintain a stable field of view, scale relationship, and shooting height reference based on the above calibration results, thereby improving the consistency and repeatability of image acquisition across different batches.

[0057] It should be noted that the shooting height reference can be determined by the length scale line on the vertical adjustment column 5, the position of the vertical sliding sleeve 13, and the height of the acquisition plane. After the external main image acquisition camera is installed, the vertical / height calibration direction can be used as the height reference direction. The height difference corresponding to the center of the external main image acquisition camera lens, the installation reference position, or the acquisition plane can be read to obtain the shooting height reference from the external main image acquisition camera to the acquisition plane.

[0058] It should be noted that this device does not directly identify or measure the defect categories of soybean seeds. Instead, it provides stable spatial calibration, boundary references, and imaging height references for the acquisition of soybean seed defect detection datasets. Defect identification, quantity statistics, or quality grading of soybean seeds can be further completed after image acquisition using image processing algorithms or deep learning detection models.

[0059] Compared with the prior art, this application has the following advantages: 1. This device adopts a side-mounted laser calibration structure, which can be used in conjunction with an external main image acquisition camera above the conveyor belt to calibrate the boundary, center line, scale reference, and shooting height reference of the soybean seed collection area.

[0060] 2. By illuminating different boundaries or reference positions of the acquisition area with the first laser emitter 15 and the second laser emitter 16 respectively, the field of view of the camera, the length of the acquisition area, the width of the acquisition area, the boundary position, and the shooting height reference of the external main image acquisition camera to the acquisition plane can be determined.

[0061] 3. Compared with manual temporary marking, visual adjustment or simple tape measure measurement, this device can improve the consistency of the shooting range, scale relationship and shooting height reference when acquiring images of different batches of soybean seeds.

[0062] 4. Both the horizontal sliding sleeve 10 and the vertical sliding sleeve 13 are equipped with U-shaped laser bearing grooves and T-shaped locking screws, which can quickly adjust and fix the position of the laser emitter, so that the laser projection position remains stable.

[0063] 5. The vertical adjustment column 5, through the cooperation of the limiting rib 6 and the rectangular insertion hole 4, can realize the rotation and snap-fit ​​height adjustment, which is simple in structure and convenient in adjustment.

[0064] 6. Two inclined support rods 8 stabilize the vertical adjustment column 5 from the front and side directions, and the angle can be adjusted through the double-ring hinge support structure, which helps the device to remain stable next to the conveyor belt or near the sample area.

[0065] 7. This device can be used for image area calibration before collecting soybean grain defect detection datasets, providing a more stable and standardized source of image data for subsequent soybean grain defect recognition models.

[0066] 8. The image acquisition device on this device can be a mobile phone, industrial camera, portable camera or small imaging module, used to assist in acquiring soybean seed images, recording laser calibration status or observing the acquisition area; at the same time, this device can also be used in conjunction with an external main image acquisition camera above the conveyor belt, and is suitable for various data acquisition scenarios such as conveyor belt acquisition, sample stage acquisition and background plate acquisition.

[0067] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any equivalent substitutions, modifications, improvements, etc., made within the technical concept of the present utility model should be included within the protection scope of the present utility model.

[0068] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art and should not be interpreted in an idealized or overly formal sense unless specifically defined.

[0069] For the sake of simplicity, the method embodiments are described as a series of actions. However, those skilled in the art should understand that the embodiments of this utility model are not limited to the described order of actions, because according to the embodiments of this utility model, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to the embodiments of this utility model.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A soybean seed image acquisition and measurement device based on laser calibration, characterized in that, include: Base; The vertically adjustable column is movably mounted on the base; A horizontal mounting rod is movably mounted on the vertical adjusting column; A vertical sliding sleeve is movably fitted onto the vertical adjusting column; A transverse sliding sleeve is movably fitted onto the transverse mounting rod; The first laser emitter is fixed on the horizontal mounting rod; The second laser emitter is fixed on the vertical sliding sleeve; The vertical adjustment column and the horizontal mounting rod are provided with length scale lines, and the intersection of the vertical adjustment column and the horizontal mounting rod is taken as the measurement origin.

2. The soybean seed image acquisition and measurement device based on laser calibration according to claim 1, characterized in that, The base includes: Cube frame; Two support rings are fixed to the side posts on both sides of the upper surface of the cube frame, respectively; A rotatable transversely perforated sleeve is inserted into the two support rings, and the rotatable transversely perforated sleeve is provided with a rectangular insertion hole.

3. The soybean seed image acquisition and measurement device based on laser calibration according to claim 2, characterized in that, The vertical adjustment column is provided with multiple protruding limiting ribs. The length of the limiting ribs is greater than half the length of the short side of the rectangular socket and less than half the length of the long side of the rectangular socket.

4. The soybean seed image acquisition and measurement device based on laser calibration according to claim 1, characterized in that, The laser-calibrated soybean seed image acquisition and measurement device also includes: A vertical laser emitter support groove, wherein the second laser emitter is disposed in the vertical laser emitter support groove, and the vertical laser emitter support groove is fixed on the vertical sliding sleeve; A transverse laser emitter support slot is provided, wherein the first laser emitter is disposed within the transverse laser emitter support slot, and the transverse laser emitter support slot is fixed to the transverse mounting rod.

5. The soybean seed image acquisition and measurement device based on laser calibration according to claim 4, characterized in that, The laser-calibrated soybean seed image acquisition and measurement device also includes: Vertical locking screws are used to secure the vertical sliding sleeve. The transverse locking screw is used to secure the transverse sliding sleeve.

6. The soybean seed image acquisition and measurement device based on laser calibration according to claim 1, characterized in that, The laser-calibrated soybean seed image acquisition and measurement device also includes: At least two inclined support rods, one end of each of which is hinged to the vertical adjusting column.

7. The soybean seed image acquisition and measurement device based on laser calibration according to claim 6, characterized in that, At least two of the inclined support rods have an included angle of 90 degrees in the horizontal direction.

8. The soybean seed image acquisition and measurement device based on laser calibration according to claim 1, characterized in that, The laser-calibrated soybean seed image acquisition and measurement device also includes: An image acquisition device is mounted on the horizontal mounting rod.

9. The soybean seed image acquisition and measurement device based on laser calibration according to claim 1, characterized in that, The laser-calibrated soybean seed image acquisition and measurement device also includes: An angle measuring device is installed on the vertical adjustment column, and the angle measuring device measures the included angle between the vertical adjustment column and the horizontal mounting rod.

10. The soybean seed image acquisition and measurement device based on laser calibration according to claim 9, characterized in that, The angle measuring device consists of angle scale lines engraved on the surface of the vertical adjustment column.

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