Image acquisition device for seed detection
By adjusting the height and angle of the image acquisition device, combined with a high-precision optical lens and a supplementary lighting unit, the problem of insufficient applicability of existing seed detection devices has been solved, achieving clear and accurate seed image acquisition and improving the reliability of detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 大连海关技术中心
- Filing Date
- 2025-07-28
- Publication Date
- 2026-05-08
AI Technical Summary
Existing seed detection devices are ill-suited to the detection needs of seeds of different sizes and shapes, resulting in insufficient depth of field or low resolution, failing to capture the side and sloping features of seeds, and leading to missed defects.
Design an image acquisition device with adjustable height and angle. The device achieves precise adjustment of height and angle through connecting components and locking mechanisms on the stage. Combined with a high-precision optical lens and a supplementary lighting unit, it ensures clear shooting.
It improves the applicability and image clarity of seed detection, reduces ghosting and blurring, and enhances the reliability and consistency of detection data.
Smart Images
Figure CN224218462U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of seed detection technology, and in particular to an image acquisition device for seed detection. Background Technology
[0002] In the field of agricultural seed quality testing, high-precision image acquisition of single seeds is a key step in achieving seed variety identification, defect detection, and quality grading. Currently, most mainstream seed testing image acquisition devices adopt a fixed structure design, and the height and angle adjustment range of image acquisition components (such as cameras and lenses) is limited, making it difficult to adapt to the testing needs of seeds of different sizes and shapes. For large seeds (such as corn and peanuts), lenses at fixed heights have insufficient depth of field due to their close working distance, resulting in blurred image edges. For small seeds (such as rapeseed and sesame), shooting from a distance reduces resolution, making it difficult to identify subtle defects. Furthermore, traditional devices typically only support a single vertical overhead view, which cannot capture the side or oblique features of the seeds, leading to missed detections of irregular defects.
[0003] Based on the above situation, it is necessary to design an image acquisition device for seed detection to solve the above problems. Utility Model Content
[0004] This invention provides an image acquisition device for seed detection to solve the problems existing in the prior art.
[0005] The technical problem solved by this utility model is achieved by the following technical solution:
[0006] An image acquisition device for seed detection includes a stage, a connecting member, an image acquisition device, and a locking mechanism. The stage is used to place the seeds to be tested and is provided with a fixed rod. The connecting member can slide up and down along the axial direction of the fixed rod and is provided with a locking element. The image acquisition device is movably connected to the connecting member through a movable frame and its height is adjusted by sliding up and down with the connecting member. The locking mechanism is provided on the connecting member and is used to lock the angle of the image acquisition device.
[0007] Preferably, the locking mechanism includes threaded rods connected to both sides of the connecting member, which lock the image acquisition device when one end of the threaded rod is in close contact with the hinge shaft on the image acquisition device.
[0008] Preferably, a connecting bracket is movably sleeved on the screw rod, the other end of the connecting bracket is connected to the image acquisition device, and a fastening nut is also threaded onto the screw rod.
[0009] Preferably, the image acquisition device includes an optical lens and an industrial camera. The optical lens is configured to acquire optical images of the seed, and the industrial camera is aligned with the optical axis of the optical lens and configured to convert the optical image into a digital image signal.
[0010] Preferably, the image acquisition device further includes a supplementary lighting unit disposed on the optical lens.
[0011] Preferably, the supplementary lighting unit is a plurality of LED light sources equidistantly arranged around the central axis of the optical lens.
[0012] The beneficial effects of this utility model are as follows: the height of the image acquisition device can be adjusted as needed by sliding the connecting component along the fixed rod to accommodate different seed sizes. The locking mechanism locks the angle of the device by contacting the hinge shaft with the screw rod, ensuring stable shooting from multiple angles and avoiding image deviations caused by improper shooting positions, thus improving the applicability of the detection. At the same time, the screw rod, together with the fastening nut and the connecting bracket, double-locks the image acquisition device to prevent the device from shaking or shifting during the detection process, ensuring image clarity and consistency, reducing problems such as ghosting and blurring caused by shaking, and improving the reliability of the detection data. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0014] Figure 1 Schematic diagram of the isometric structure provided by this utility model Figure 1 ;
[0015] Figure 2 Schematic diagram of the isometric structure provided by this utility model Figure 2 ;
[0016] Figure 3 This is a partial structural schematic diagram of the present invention.
[0017] In the diagram, 1 is the stage; 2 is the fixed rod; 3 is the connecting component; 4 is the locking component; 5 is the movable frame; 6 is the screw rod; 7 is the connecting bracket; 8 is the fastening nut; 9 is the LED light source; 10 is the optical lens; and 11 is the industrial camera. Detailed Implementation
[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below with reference to specific illustrations.
[0019] Reference Figures 1-3 As shown, an image acquisition device for seed detection includes a platform 1 for placing seeds to be tested, a fixed rod 2 on the platform 1, a connecting member 3 that can slide along the axial direction of the fixed rod 2 on the fixed rod 2, a locking member 4 on the connecting member 3, and an image acquisition device. The image acquisition device is movably connected to the connecting member 3 via a movable frame 5 and can slide up and down with the connecting member 3 to achieve height adjustment. At the same time, a locking mechanism is provided on the connecting member 3 to lock the angle of the image acquisition device.
[0020] Specifically, in actual use, the single seed to be tested is first placed on the stage 1 below. The fixing rod 2 provides a guide track for the sliding of the connecting member 3. The fixing rod 2 can be a cylindrical metal rod with a smooth surface to reduce the friction when the connecting member 3 slides. The locking part 4 on the connecting member 3 is preferably a bolt structure. When it is necessary to adjust the height of the image acquisition device, the bolt is loosened, and the connecting member 3 can slide freely on the fixing rod 2. After adjusting to a suitable height, the bolt is tightened. Through the friction between the bolt and the fixing rod 2, the connecting member 3 is firmly fixed in the corresponding position of the fixing rod 2, thereby realizing the precise adjustment of the height of the image acquisition device to adapt to the detection needs of seeds of different sizes.
[0021] The angle of the image acquisition device is adjusted by a locking mechanism to securely lock the angle of the image acquisition device, ensuring that the image acquisition device can maintain a stable shooting angle and obtain clear and accurate seed images during the seed detection process.
[0022] Specifically, the locking mechanism includes threaded rods 6 connected to both sides of the connecting member 3. When one end of the threaded rod 6 is in close contact with the hinge shaft on the image acquisition device, the image acquisition device is locked. A connecting bracket 7 is movably sleeved on the threaded rod, and the other end of the connecting bracket 7 is connected to the image acquisition device. A fastening nut 8 is also threaded onto the threaded rod 6. When it is necessary to adjust the angle of the image acquisition device, the fastening nut 8 is loosened, and the image acquisition device can rotate freely around the hinge shaft. After adjusting to the required angle, the threaded rod 6 is tightened so that one end of the threaded rod 6 is in close contact with the hinge shaft on the image acquisition device. The threaded rod 6 is then further fixed by the fastening nut 8, thereby firmly locking the angle of the image acquisition device and ensuring that the image acquisition device can maintain a stable shooting angle and obtain clear and accurate seed images during the seed detection process.
[0023] Reference Figure 3As shown, the image acquisition device further includes an optical lens 10 and an industrial camera 11. The optical lens 10 is configured to acquire optical images of the seeds, for example, it contains at least two aspherical lenses to effectively correct aberrations and chromatic aberrations, improving image clarity. The lens aperture is set to F2.8-F4.0, ensuring sufficient light intake while controlling the depth of field, ensuring clear imaging of all parts of the seed surface and achieving high-precision capture of details such as seed surface texture and defects. The optical axes of the industrial camera 11 and the optical lens 10 are strictly aligned, and the coaxiality error between them is less than 0.05mm through a precise mechanical structure and calibration process. The industrial camera 11 is configured to convert the optical images acquired by the optical lens 10 into digital image signals. It uses a CMOS image sensor with a pixel resolution of no less than 20 million pixels and a frame rate of up to 60fps, enabling it to quickly and clearly convert optical images into digital signals, providing a high-quality data foundation for subsequent image analysis and processing. Simultaneously, the industrial camera 11 supports Gigabit Ethernet interface output, facilitating rapid data transmission with external image analysis equipment.
[0024] Furthermore, the optical lens 10 is equipped with a supplementary lighting unit, which consists of multiple LED light sources 9 equidistantly arranged around the central axis of the optical lens 10. The number of LED light sources 9 is 6-8, and the angle between adjacent light sources is 45°-60°. Each LED light source 9 is equipped with an independent optical lens to collimate and diffuse the light, so that the light can evenly cover the seed surface. At the same time, the LED light source 9 adopts a constant current drive circuit to ensure the stability of the output light intensity and avoid the impact of light intensity fluctuations on image acquisition quality. This circumferentially equidistant supplementary lighting design can effectively eliminate shadows and reflective areas on the seed surface, ensuring that the seed can obtain uniform illumination from all angles, thereby improving the contrast and clarity of the image, making the surface features of the seed more clearly distinguishable, and facilitating the accurate identification of seed quality, defects, and other information through subsequent image analysis.
[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. An image acquisition device for seed detection, characterized in that, include; A stage (1) is provided on which seeds to be tested are placed, and a fixing rod (2) is provided on the stage (1). The connecting member (3) can slide up and down along the axial direction of the fixed rod (2), and the connecting member (3) is provided with a locking member (4). The image acquisition device is movably connected to the connecting member (3) via a movable frame (5) and its height is adjusted by sliding up and down along with the connecting member (3). A locking mechanism is provided on the connecting member (3) and is used to lock the angle of the image acquisition device.
2. The image acquisition device for seed detection according to claim 1, characterized in that, The locking mechanism includes threaded rods (6) that are threaded to both sides of the connecting member (3). When one end of the threaded rod (6) is in close contact with the hinge shaft on the image acquisition device, the image acquisition device is locked.
3. The image acquisition device for seed detection according to claim 2, characterized in that, A connecting bracket (7) is movably sleeved on the screw rod (6). The other end of the connecting bracket (7) is connected to the image acquisition device, and a fastening nut (8) is also threaded onto the screw rod (6).
4. The image acquisition device for seed detection according to claim 1, characterized in that, The image acquisition device includes: An optical lens (10) is configured to capture an optical image of the seed; An industrial camera (11) is configured to be aligned with the optical axis of the optical lens (10) and to convert optical images into digital image signals.
5. The image acquisition device for seed detection according to claim 1, characterized in that, The image acquisition device also includes a supplementary lighting unit disposed on the optical lens (10).
6. The image acquisition device for seed detection according to claim 5, characterized in that, The supplementary lighting unit consists of multiple LED light sources (9) arranged equidistantly around the central axis of the optical lens (10).