A device for measuring the volume of fresh agricultural products

Abstract

This invention relates to the field of agricultural product screening technology and provides a fresh agricultural product volume measuring device, including an input conveyor belt and an output conveyor belt. The input conveyor belt is located diagonally above the feed side of the output conveyor belt. The input conveyor belt is mounted on input baffles on both sides, and the output conveyor belt is mounted on output baffle one and output baffle two on both sides. A light-shielding cylinder is disposed between the input and output conveyor belts, located below the input conveyor belt. The discharge end of the light-shielding cylinder is fixedly connected to output baffle one and output baffle two. The fresh agricultural product volume measuring device provided by this solution uses a multi-directionally deployed CCD industrial camera, combined with the light source of the light-shielding cylinder and the background plate to form a closed, light-proof detection space. It can acquire images of agricultural products from multiple angles without obstruction, avoiding the shadows and blind spots caused by the placement of fresh agricultural products, and achieving omnidirectional, blind-spot-free measurement of the volume of fresh agricultural products.

Description

Technical Field

[0001] This invention belongs to the field of agricultural product screening technology, and in particular relates to a device for measuring the volume of fresh agricultural products. Background Technology

[0002] Currently, machine vision-based color feature detection technology for agricultural products is relatively mature and has been successfully applied in commercial agricultural product grading and sorting devices, such as rice color sorters and corn color sorters. It removes damaged grains, discolored grains, and other impurities from agricultural products based on the degree of light reflection from different colors and characteristics such as mold and off-white. Existing agricultural product grading and sorting methods mainly rely on single color features as the criterion, failing to comprehensively consider the appearance and size of agricultural products, especially volume. This limits the current limitations of color-based sorting methods. With rising living standards and technological advancements, people have increasingly higher demands for the quality of agricultural products. For the deep processing of agricultural products, the sorting criteria will become increasingly stringent and detailed. Clearly, sorting methods based solely on color features will struggle to adapt to this trend of increasingly stringent and detailed sorting. To achieve higher-quality sorting of agricultural products, in addition to detecting color features, other characteristics such as size should also be detected to facilitate higher-level sorting.

[0003] While some existing technologies have devices capable of measuring and screening the volume of agricultural products, they cannot guarantee a measurement without blind spots. In particular, after agricultural products are placed, there are usually shadows and obstructions, requiring multiple flips and adjustments or transmissions for measurement, resulting in low efficiency. Summary of the Invention

[0004] This invention provides a device for measuring the volume of fresh agricultural products, aiming to solve the problems mentioned in the background art.

[0005] To solve the above problems, the present invention provides a fresh agricultural product volume measuring device, comprising: an input conveyor belt and an output conveyor belt, wherein the input conveyor belt is located obliquely above the feed side of the output conveyor belt; the input conveyor belt is mounted on input baffles on both sides, and the output conveyor belt is mounted on output baffle one and output baffle two on both sides; a light-shielding cylindrical shell is disposed between the input and output conveyor belts, the light-shielding cylindrical shell being located below the input conveyor belt, and the discharge end of the light-shielding cylindrical shell being fixedly connected to output baffle one and output baffle two; a light-transmitting tube is fixedly installed inside the light-shielding cylindrical shell for the fresh agricultural product to enter for measurement, the discharge end of the light-transmitting tube extending above the feed side of the output conveyor belt, and a guide tube fixedly installed at the top of the light-transmitting tube, the top end of the guide tube penetrating the light-shielding cylindrical shell and extending below the discharge end of the input conveyor belt. A material-gathering arc plate is fixedly installed at the top of the feed tube, and the material-gathering arc plate is connected to the discharge end of the input conveyor belt for introducing fresh agricultural products. Three CCD industrial cameras are fixedly installed on the light-shielding cylinder shell at an angle of 120°. The recognition ends of the three CCD industrial cameras are all set towards the light-transmitting tube for identifying the fresh agricultural products inside. A background plate and a light source are set opposite each of the three CCD industrial cameras. The background plate and the light source are both located inside the light-shielding cylinder shell and face the light-transmitting tube. A light-shielding tail cylinder is fixedly installed at the tail end of the light-transmitting tube. The light-shielding tail cylinder and the light-transmitting tube have the same inner diameter. The same cleaning scraper is slidably installed inside the light-shielding tail cylinder and the light-transmitting tube. When it slides, it is used to push the fresh agricultural products off the light-transmitting tube and discharge them to the output conveyor belt, and to clean the inner wall of the light-transmitting tube.

[0006] Preferably, a discharge sealing plate is slidably installed through the tail end of the light-shielding tail cylinder. The discharge sealing plate is fixedly connected to the cleaning scraper and is used to block the discharge end of the guide pipe when sliding with the cleaning scraper to avoid material jamming. The discharge sealing plate is arc-shaped.

[0007] Preferably, a toothed assembly is fixedly installed at the bottom of the feeding sealing plate, a sliding opening is provided on the feeding sealing plate, a drive shaft is rotatably installed on the light-shielding tail cylinder and the light-shielding cylinder shell, the drive shaft passes through the sliding opening to accommodate the sliding of the feeding sealing plate, a spur gear is fixedly sleeved on the drive shaft, the spur gear meshes with the toothed assembly, and is used to drive the feeding sealing plate and the cleaning scraper to move, a push motor is fixedly installed on the side of the light-shielding cylinder shell, and the output shaft of the push motor is fixedly connected to the end of the drive shaft.

[0008] Preferably, a rectangular guide plate is fixedly installed between the input sides of the first output baffle and the second output baffle. The rectangular guide plate is located above the discharge end of the output conveyor belt and the light-transmitting tube. A cleaning screw is rotatably installed between the input sides of the first output baffle and the second output baffle. The cleaning screw and the rectangular guide plate are at the same height and are arranged parallel to each other. The same cleaning scraper is sleeved on the rectangular guide plate and the cleaning screw. The scraper is used to slide and clean the surface of the light-transmitting tube when the pushing side of the scraper is parallel to the discharge end of the light-transmitting tube.

[0009] Preferably, both the first and second output baffles are provided with cleaning ports, and both cleaning ports correspond to the cleaning scraper and are used to clean the cleaning scraper.

[0010] Preferably, two guide plates are fixedly installed on the feeding side of the material-gathering arc plate, and both guide plates are connected to the top of the input conveyor belt for introducing fresh agricultural products.

[0011] Preferably, multiple buffer rubber sheets are fixedly installed inside the feed tube, and the multiple buffer rubber sheets are evenly distributed in a circular array to buffer the fresh agricultural products when they fall.

[0012] Preferably, a lifting strip is fixedly installed between the first output baffle and the second output baffle. The lifting strip is at the same height as the rectangular guide plate. Multiple buffer rubber curtains are fixedly installed at the bottom of the lifting strip. The buffer rubber curtains are located on the side of the cleaning scraper away from the light-transmitting tube and are used to buffer the fresh agricultural products discharged from the light-transmitting tube.

[0013] Preferably, an input motor is fixedly installed on the side of the input baffle, and the output shaft of the input motor is connected to the input end of the input conveyor belt for driving the input conveyor belt. An output motor is fixedly installed on the side of the output baffle, and the output shaft of the output motor is connected to the input end of the output conveyor belt for driving the output conveyor belt.

[0014] Preferably, the output baffle 2 is provided with multiple discharge ports, and the specifications of the multiple discharge ports are arranged sequentially to discharge fresh agricultural products of different specifications respectively.

[0015] Compared with related technologies, the fresh agricultural product volume measuring device provided by the present invention has the following beneficial effects: Compared with existing technologies, the fresh agricultural product volume measurement device provided in this solution uses CCD industrial cameras deployed in multiple directions, along with a light-shielding cylindrical shell light source and a background plate to form a closed light-shielding detection space. This allows for the acquisition of agricultural product images from multiple angles without obstruction, avoiding the problems of shadows and blind spots caused by the placement of fresh agricultural products, and achieving all-round, blind-spot-free measurement of the volume of fresh agricultural products. Attached Figure Description

[0016] Figure 1 This is a front-view stereoscopic structural diagram of the present invention; Figure 2 for Figure 1 An enlarged structural diagram of part A shown in the figure; Figure 3 for Figure 1 An enlarged structural diagram of part B shown in the figure; Figure 4 This is a rear-view stereoscopic structural diagram of the present invention; Figure 5 for Figure 4 An enlarged structural diagram of section C shown in the figure; Figure 6 for Figure 4 An enlarged structural diagram of part D shown in the figure; Figure 7 This is a schematic diagram of the front cross-sectional structure of the present invention; Figure 8 for Figure 7 An enlarged structural diagram of part E shown in the figure; Figure 9 for Figure 7 An enlarged structural diagram of part F shown in the figure; Figure 10 for Figure 7 An enlarged structural diagram of part G shown in the figure; Figure 11 This is a structural diagram of the light-transmitting tube, the material guide tube, the material gathering arc plate, the CCD industrial camera, the backlight plate, the light source, the light-shielding tail tube, and the unloading sealing plate. Figure 12 A structural schematic diagram of the cleaning scraper, the material unloading plate, and a portion of the drive shaft; Figure 13 This is a schematic diagram of the material distribution and emission control mechanism; Figure 14 This is a schematic diagram of a compressed air-powered fresh produce delivery mechanism.

[0017] Reference numerals: 1. Input conveyor belt; 2. Output conveyor belt; 3. Input baffle; 4. Output baffle one; 5. Output baffle two; 6. Light-shielding cylinder shell; 7. Light-transmitting tube; 8. Material guide tube; 9. Material gathering arc plate; 10. CCD industrial camera; 11. Background plate; 12. Light source; 13. Light-shielding tail cylinder; 14. Cleaning scraper; 15. Discharge sealing plate; 16. Gear assembly one; 17. Sliding port; 18. Drive shaft one; 19. Circular gear one; 20. Push motor; 21. Rectangular guide plate; 22. Cleaning screw; 23. Cleaning scraper; 24. Cleaning port; 25. 26. Guide sloping plate; 27. Buffer rubber sheet; 28. Lifting strip; 29. ​​Buffer rubber curtain; 20. Input motor; 31. Output motor; 32. Discharge port; 33. Lifting frame; 34. Material blocking plate; 35. Gear assembly II; 36. Drive shaft II; 37. Circular gear II; 38. Opening and closing motor; 39. Sealing plate; 40. Rectangular guide bar; 41. Opening and closing screw; 42. Sliding plate; 43. Lifting plate; 44. High-pressure air pipe; 45. Air jet pipe; 46. Solenoid valve; 47. Controller; 48. High-pressure air tank; 49. Air pump; 40. Pressure gauge. Detailed Implementation

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] This invention provides a device for measuring the volume of fresh agricultural products, such as... Figure 1-14As shown, the fresh agricultural product volume measuring device includes: an input conveyor belt 1 and an output conveyor belt 2. The input conveyor belt 1 is located diagonally above the feed side of the output conveyor belt 2. The input conveyor belt 1 is mounted on input baffles 3 on both sides, and the output conveyor belt 2 is mounted on output baffles 4 and 5 on both sides. A light-shielding cylindrical shell 6 is provided between the input conveyor belt 1 and the output conveyor belt 2. The light-shielding cylindrical shell 6 is located below the input conveyor belt 1, and the discharge end of the light-shielding cylindrical shell 6 is fixedly connected to the output baffles 4 and 5. A light-transmitting tube 7 is fixedly installed inside the light-shielding cylindrical shell 6 for the fresh agricultural products to enter and be measured. The discharge end of the light-transmitting tube 7 extends above the feed side of the output conveyor belt 2. A guide tube 8 is fixedly installed at the top of the light-transmitting tube 7. The top end of the guide tube 8 penetrates the light-shielding cylindrical shell 6 and extends below the discharge end of the input conveyor belt 1. A material-gathering arc plate 9 is fixedly installed at the top end of the guide tube 8. The material-gathering arc plate 9 is connected to the discharge end of the input conveyor belt 1 for introducing fresh agricultural products. Three CCD industrial cameras 10 are fixedly installed on the light-shielding cylinder shell 6 at an angle to each other. The angle of each of the three CCD industrial cameras 10 is 120°. The recognition ends of the three CCD industrial cameras 10 are all set towards the light-transmitting tube 7 for recognizing the fresh agricultural products inside. A background plate 11 and a light source 12 are set opposite each of the three CCD industrial cameras 10. The background plate 11 and the light source 12 are both located inside the light-shielding cylinder shell 6 and face the light-transmitting tube 7. A light-shielding tail cylinder 13 is fixedly installed at the tail end of the light-transmitting tube 7. The light-shielding tail cylinder 13 penetrates the tail end of the light-shielding cylinder shell 6. The inner diameter of the light-shielding tail cylinder 13 and the light-transmitting tube 7 are equal. The same cleaning scraper 14 is slidably installed inside the light-shielding tail cylinder 13 and the light-transmitting tube 7. When it slides, it is used to push the fresh agricultural products away from the light-transmitting tube 7 and discharge them to the output conveyor belt 2, and to clean the inner wall of the light-transmitting tube 7.

[0020] In this embodiment, fresh agricultural products are transported to the end position via the input conveyor belt 1. The fresh agricultural products fall into the material gathering arc plate 9 for gathering and guidance, and then smoothly enter the light-transmitting tube 7 along the guide tube 8. The light-shielding cylinder shell 6 isolates the internal detection environment from external stray light interference. Three CCD industrial cameras 10 capture images of the fresh agricultural products inside the light-transmitting tube 7 from different directions. The light source 12, together with the background plate 11, provides uniform supplementary lighting and solid color background support for the shooting area (the specific measurement method is referred to Chinese Patent Application No.: 201621435699.5). The three cameras are at an angle to each other. The CCD industrial camera 10 is equipped with a camera driver and an image acquisition processor. The camera driver is connected to three CCD industrial cameras 10 simultaneously, and the image acquisition processor is connected to both the three CCD industrial cameras 10 and the camera driver. The line of sight of the three CCD industrial cameras 10 intersects at the intersection point. The angle of the three CCD industrial cameras 10 is determined by ensuring that the coverage of the three-sided image after imaging exceeds the entire three-dimensional surface of the agricultural product to be measured. The three CCD industrial cameras can move back and forth along their line of sight. When measuring the volume of the agricultural product to be measured, the agricultural product is placed under the three CCD industrial cameras 10. At the intersection of the visual lines, the distance between the three CCD industrial cameras 10 and the agricultural product to be tested is adjusted so that the three-sided image coverage of the agricultural product after imaging by the three CCD industrial cameras 10 exceeds the entire three-dimensional surface of the agricultural product. Three-sided images of the agricultural product are acquired, and the images are analyzed and processed using camera drivers and image acquisition processors to obtain six dimensional parameters of the three-sided images. These parameters are then substituted into a pre-established agricultural product volume prediction model to predict the volume of the agricultural product. The color of the background plate 11 is significantly different from the color of the agricultural product to be tested, ensuring that the color of the agricultural product is consistent with the color of the background plate 11. The foreground and background colors of the image are significantly different, providing the necessary prerequisites for rapid image segmentation; the camera driver is implemented by an FPGA-based driver board to drive the camera and related algorithms (such as image filtering, image segmentation and other preprocessing, volume prediction algorithms, etc.); after detection, the cleaning scraper 14 slides inside the light-shielding tail cylinder 13 and the light-transmitting tube 7, pushing the fresh agricultural products that have completed volume detection in the light-transmitting tube 7 out, and the fresh agricultural products fall onto the output conveyor belt 2 to complete the conveying and discharge. At the same time, the cleaning scraper 14 scrapes and cleans the impurities attached to the inner wall of the light-transmitting tube 7 during the sliding process; The input conveyor belt 1 and the output conveyor belt 2 are arranged at an angle and are staggered. Together with the input baffle 3, the output baffle 1 4 and the output baffle 2 5, they form a regular fresh agricultural product conveying channel. The material gathering arc plate 9 and the material guide pipe 8 form a continuous material guiding path, which can orderly guide fresh agricultural products into the light-transmitting tube 7 to achieve single-material regular movement. Multiple CCD industrial cameras 10 are arranged at an angle inside the light-shielding cylinder shell 6. Together with the light source 12 and the background plate 11 at the corresponding positions, they can simultaneously collect the appearance images of fresh agricultural products in the light-transmitting tube 7 from multiple directions. The volume characteristics of agricultural products can be completely captured by relying on multi-view image information. The tail of the light-transmitting tube 7 is connected to the light-shielding tail cylinder 13 with the same inner diameter. The cleaning scraper 14 is adapted to slide in the internal space of both. It can realize the automatic unloading and conveying of fresh agricultural products after detection, and can also perform self-cleaning operation on the inner wall of the light-transmitting tube 7 in real time. There is no need to flip and adjust the posture of agricultural products multiple times throughout the process. This device uses CCD industrial cameras 10 arranged in multiple directions, along with a light source 12 and a background plate 11, to form a closed, light-proof detection space. This allows for the acquisition of images of agricultural products from multiple angles without obstruction, avoiding shadows and blind spots caused by the placement of fresh agricultural products. This enables comprehensive, blind-spot-free measurement of the volume of fresh agricultural products. Relying on the continuous material guiding structure from the input conveyor belt 1 to the guide tube 8 and then to the light-transmitting tube 7, fresh agricultural products can move autonomously and orderly to complete the detection and discharge process. This eliminates the need for manual repeated flipping and adjustment of the fresh agricultural products, significantly improving the overall efficiency of agricultural product volume measurement and sorting. With the help of the cleaning scraper 14, the pushing and unloading of fresh agricultural products and the cleaning of the inner wall of the light-transmitting tube 7 can be completed simultaneously, preventing the inner wall deposits from affecting the accuracy of subsequent visual inspection, ensuring the long-term stable operation of the device, and adapting to the needs of continuous, large-scale volume grading and detection of fresh agricultural products.

[0021] In a further preferred embodiment of the present invention, a discharge sealing plate 15 is slidably installed through the tail end of the light-shielding tail cylinder 13. The discharge sealing plate 15 is fixedly connected to the cleaning scraper 14 and is used to block the discharge end of the guide pipe 8 when sliding with the cleaning scraper 14 to avoid material jamming. The discharge sealing plate 15 is arc-shaped.

[0022] In this embodiment, the material discharge sealing plate 15 is slidably installed at the tail end of the light-shielding tail cylinder 13. The material discharge sealing plate 15 slides and moves synchronously with the cleaning scraper 14. When the cleaning scraper 14 slides to discharge material, the material discharge sealing plate 15 moves synchronously and forms a shielding barrier on the discharge end of the guide tube 8. After the fresh agricultural products inside the light-transmitting tube 7 are completely discharged, the material discharge sealing plate 15 is reset in the opposite direction with the cleaning scraper 14, releasing the shielding on the discharge end of the guide tube 8, allowing subsequent fresh agricultural products to fall normally into the light-transmitting tube 7 for testing. The discharge sealing plate 15 adopts an arc-shaped structure and is fixedly connected to the cleaning scraper 14. It can move in conjunction with the reciprocating sliding of the cleaning scraper 14. Based on the sliding assembly relationship between the discharge sealing plate 15 and the light-shielding tail cylinder 13, the discharge sealing plate 15 simultaneously forms a physical barrier to the discharge area below the guide pipe 8 during the process of the cleaning scraper 14 pushing fresh agricultural products once. This restricts the continuous falling of subsequent fresh agricultural products into the light-transmitting pipe 7 and avoids the accumulation and mutual compression of fresh agricultural products. The arc-shaped discharge sealing plate 15 can conform to the falling flow direction of fresh agricultural products, smoothly blocking the falling fresh agricultural products without causing bumps or damage to them.

[0023] In a further preferred embodiment of the present invention, a toothed assembly 16 is fixedly installed at the bottom of the unloading sealing plate 15, and a sliding opening 17 is provided on the unloading sealing plate 15. A drive shaft 18 is rotatably installed on the light-shielding tail cylinder 13 and the light-shielding cylinder shell 6. The drive shaft 18 passes through the sliding opening 17 to accommodate the sliding of the unloading sealing plate 15. A spur gear 19 is fixedly sleeved on the drive shaft 18. The spur gear 19 meshes with the toothed assembly 16 and is used to drive the unloading sealing plate 15 and the cleaning scraper 14 to move. A push motor 20 is fixedly installed on the side of the light-shielding cylinder shell 6, and the output shaft of the push motor 20 is fixedly connected to the end of the drive shaft 18.

[0024] In this embodiment, when the push motor 20 is working, it drives the drive shaft 18 to rotate. The drive shaft 18 passes through the sliding port 17 to adapt to the sliding stroke of the feeding sealing plate 15. The spur gear 19 rotates synchronously with the drive shaft 18 and drives the feeding sealing plate 15 to slide linearly through the meshing transmission with the tooth group 16. During the sliding process of the feeding sealing plate 15, it synchronously drives the cleaning scraper 14 to move as a whole, thereby completing the pushing of fresh agricultural products and the blocking and sealing action of the discharge end of the guide pipe 8. The push motor 20 can drive the various structures to reset by reversing the rotation, so as to realize the reciprocating cycle operation.

[0025] In a further preferred embodiment of the present invention, a rectangular guide plate 21 is fixedly installed between the input sides of the first output baffle 4 and the second output baffle 5. The rectangular guide plate 21 is located above the discharge end of the output conveyor belt 2 and the light-transmitting tube 7. A cleaning screw 22 is rotatably installed between the input sides of the first output baffle 4 and the second output baffle 5. The cleaning screw 22 and the rectangular guide plate 21 are at the same height and are arranged in parallel. The same cleaning scraper 23 is sleeved on the rectangular guide plate 21 and the cleaning screw 22, which is used to slide and clean the surface of the light-transmitting tube 7 when the pushing side of the cleaning scraper 14 is parallel to the discharge end of the light-transmitting tube 7.

[0026] In this embodiment, the rectangular guide plate 21 is fixed between the input sides of the first output baffle 4 and the second output baffle 5 and is located above the discharge end of the output conveyor belt 2 and the light-transmitting tube 7. The cleaning screw 22 rotates between the input sides of the first output baffle 4 and the second output baffle 5. The cleaning scraper 23 is simultaneously sleeved on the outside of the rectangular guide plate 21 and the cleaning screw 22, and slides smoothly along the guiding direction of the rectangular guide plate 21 following the rotation of the cleaning screw 22. When the pushing side of the cleaning scraper 14 is flush with the discharge end of the light-transmitting tube 7, the cleaning scraper 23 performs a comprehensive cleaning operation on the outer surface of the light-transmitting tube 7. The cleaning screw 22 can be driven manually or by a motor.

[0027] In a further preferred embodiment of the present invention, both the first output baffle 4 and the second output baffle 5 are provided with cleaning ports 24, and both cleaning ports 24 correspond to the cleaning scraper 23 and are used to clean the cleaning scraper 23.

[0028] In this embodiment, during the reciprocating sliding operation of the cleaning scraper 23 along the rectangular guide plate 21 and the cleaning screw 22, it can slide to the position corresponding to the cleaning port 24. The cleaning port 24 is respectively opened on the output baffle 4 and the output baffle 5. The outside can directly contact the cleaning scraper 23 through the cleaning port 24 to clean and maintain the debris attached to the surface of the cleaning scraper 23.

[0029] In a further preferred embodiment of the present invention, two guide plates 25 are fixedly installed on the feeding side of the material gathering arc plate 9. Both guide plates 25 are connected to the top of the input conveyor belt 1 for introducing fresh agricultural products.

[0030] In this embodiment, after the fresh agricultural products conveyed by the input conveyor belt 1 fall off from the end, they directly enter the area between the two guide inclined plates 25. The guide inclined plates 25 gather the scattered fresh agricultural products and smoothly guide and converge them into the inside of the material gathering arc plate 9, so that the fresh agricultural products enter the subsequent material guiding structure in an orderly manner according to a fixed trajectory.

[0031] In a further preferred embodiment of the present invention, a plurality of buffer rubber sheets 26 are fixedly installed inside the feed tube 8. The plurality of buffer rubber sheets 26 are evenly distributed in a circular array to buffer the falling fresh agricultural products.

[0032] In this embodiment, multiple buffer rubber sheets 26 are fixedly installed in the internal space of the feed tube 8. The buffer rubber sheets 26 are evenly arranged in a circular array around the inner wall of the feed tube 8. As fresh agricultural products fall vertically down the feed tube 8, they will make flexible contact with the arrayed buffer rubber sheets 26 in sequence. Relying on the flexible deformation characteristics of the buffer rubber sheets 26 themselves, the impact force generated by the falling fresh agricultural products is dissipated, thereby slowing down the falling speed of the fresh agricultural products and allowing the fresh agricultural products to enter the next structural position in a stable posture.

[0033] In a further preferred embodiment of the present invention, a lifting strip 27 is fixedly installed between the output baffle 4 and the output baffle 5. The lifting strip 27 is at the same height as the rectangular guide plate 21. Multiple buffer rubber curtains 28 are fixedly installed at the bottom of the lifting strip 27. The buffer rubber curtains 28 are located on the side of the cleaning scraper 23 away from the light-transmitting tube 7 and are used to buffer the fresh agricultural products discharged from the light-transmitting tube 7.

[0034] In this embodiment, the lifting strip 27 is fixedly mounted between the output baffle 4 and the output baffle 5. The lifting strip 27 and the rectangular guide plate 21 are arranged at the same height to form a stable installation reference. Multiple buffer rubber curtains 28 are fixed at the bottom of the lifting strip 27 and arranged on the side of the cleaning scraper 23 away from the light-transmitting tube 7. When fresh agricultural products pass through the buffer rubber curtains 28 from the discharge end of the light-transmitting tube 7, they are buffered by the flexibility of the buffer rubber curtains 28 themselves to prevent the fresh agricultural products from rolling.

[0035] In a further preferred embodiment of the present invention, an input motor 29 is fixedly installed on the side of the input baffle 3, and the output shaft of the input motor 29 is connected to the input end of the input conveyor belt 1 for driving the input conveyor belt 1. An output motor 30 is fixedly installed on the side of the output baffle 4, and the output shaft of the output motor 30 is connected to the input end of the output conveyor belt 2 for driving the output conveyor belt 2.

[0036] In this embodiment, the input motor 29 is fixedly mounted on the side of the input baffle 3, and the output shaft of the input motor 29 is directly connected to the input end of the transmission belt 1, providing dedicated rotational power for the input belt 1; the output motor 30 is fixedly mounted on the side of the output baffle 4, and the output shaft of the output motor 30 is connected to the input end of the output belt 2, providing independent rotational power for the output belt 2; the two motors form independent drive units corresponding to their respective transmission belts, and the working states of the input belt 1 and the output belt 2 can be adjusted according to the rhythm of the detection operation.

[0037] In a further preferred embodiment of the present invention, the output baffle 2 5 is provided with a plurality of discharge ports 31, the specifications of the plurality of discharge ports 31 are arranged sequentially, and are used to discharge fresh agricultural products of different specifications respectively.

[0038] In this embodiment, multiple discharge ports 31 are sequentially opened on the output baffle 2 5. The discharge ports 31 are arranged in sequence according to the size difference to form a graded discharge channel. Based on the size grade determined by the previous volume detection, when agricultural products of different sizes move to the corresponding position, they are discharged outward through the matching discharge port 31. The fresh agricultural products are automatically sorted and diverted according to the size by relying on the arranged discharge ports 31. A receiving conveyor belt can be set at the discharge position of the discharge port 31. The remaining unqualified products can be discharged from the tail of the output conveyor belt 2.

[0039] To further improve the performance of this device, in addition to the above-mentioned solutions, this solution also includes the following embodiments: In another embodiment of the present invention, multiple sets of material dispensing control mechanisms are provided on the output baffle 4 and the output baffle 5. These multiple sets of material dispensing control mechanisms are respectively configured to correspond to multiple discharge ports 31 for dispensing fresh agricultural products of various specifications. Each material dispensing control mechanism includes a lifting frame 32 fixedly installed between the output baffle 4 and the output baffle 5. The lifting frame 32 is at the same height as the lifting strip 27. A material blocking plate 33 is slidably mounted on the lifting frame 32. The material blocking plate 33 is vertically positioned to output the conveyor belt 2. The lifting path of the material blocking plate 33 is located on the discharge side of the corresponding discharge port 31, used to intercept the fresh agricultural products. A toothed gear assembly 34 is fixedly installed on the non-discharging side of the material blocking plate 33. A drive shaft 35 is rotatably mounted on the output baffle 4 and the output baffle 5. A spur gear 36 is fixedly sleeved on the drive shaft 35. The spur gear 36 meshes with the toothed gear assembly 34 to control the lifting and lowering of the material blocking plate 33. An opening / closing motor 37 is fixedly installed on the output baffle 4. The output shaft of the opening / closing motor 37 is connected to the drive shaft 35 to drive its rotation. A sealing plate 38 is slidably installed inside the discharge port 31. When inserted, it cooperates with the output conveyor belt 2 to guide the material; when detached, it discharges the material. A rectangular guide bar 39 is fixedly installed on the output baffle 5. An opening / closing screw 40 is arranged parallel to the side of the rectangular guide bar 39 and is fixedly connected to the end of the drive shaft 35. The rectangular guide bar 39 and the opening / closing screw 40 are connected to the drive shaft 35. The same sliding plate 41 is sleeved on the screw 40. The same lifting plate 42 is fixedly installed on the sliding plate 41 and the sealing plate 38 so that when the drive shaft 35 and the opening and closing screw 40 rotate synchronously, the lifting and lowering of the blocking plate 33 and the sliding of the sealing plate 38 are synchronized. That is, the blocking plate 33 descends to stop the fresh agricultural products, and the sealing plate 38 disengages from the discharge port 31 to discharge the material. The output baffle 4 is equipped with a pneumatic fresh agricultural product pushing mechanism, which is used to spray air to assist the discharge of fresh agricultural products according to the position of the discharge port 31.

[0040] In this embodiment, the hoisting frame 32 is erected between the output baffle 4 and the output baffle 5 and is at the same height as the hoisting strip 27, providing a stable lifting and sliding installation base for the material blocking plate 33. The vertically arranged material blocking plate 33 rises and falls along a fixed route, and can accurately stop and limit fresh agricultural products on the side of the corresponding discharge port 31. The side of the material blocking plate 33 is provided with a toothed assembly 34. The rotating drive shaft 35 forms a meshing transmission with the toothed assembly 34 through the spur gear 36. The opening and closing motor 37 provides a power source for the entire transmission structure, realizing the controllable adjustment of the lifting action of the material blocking plate 33. The opening and closing screw 40 is fixedly linked to the end of the drive shaft 35. The rectangular guide bar 39 provides linear sliding guidance for the sliding plate 41. The sliding plate 41 forms a fixed connection structure with the sealing plate 38 through the lifting plate 42. When the drive shaft 35 rotates, it can synchronously drive the sealing plate 38 to move smoothly within the discharge port 31, realizing the switching between closing and opening of the discharge port 31. The air-compressed fresh agricultural product pushing mechanism matches the working sequence based on the layout position of the discharge port 31. It uses airflow to assist the fresh agricultural products to leave the conveying channel, and forms a working sequence coordination with the blocking plate 33 and the sealing plate 38. The multi-component material discharge control mechanism is matched one-to-one with multiple discharge ports 31, which can accurately control the discharge of fresh agricultural products according to specifications and grades, realize the automatic classification and discharge of fresh agricultural products of different volumes, and improve the sorting precision. Through the unified linkage of the opening and closing motor 37 and the drive shaft 35, the lifting and stopping of the material blocking plate 33 and the sliding opening and closing of the sealing plate 38 can be controlled synchronously. The action sequence is highly coordinated to avoid the mis-discharge and leakage of fresh agricultural products. The rectangular guide bar 39 cooperates with the opening and closing screw 40 to provide smooth guiding transmission for the sliding plate 41, so that the sealing plate 38 slides smoothly without jamming. When the flat-mounted sealing plate 38 is closed, it can fit against the output conveyor belt 2 to keep the fresh agricultural products moving normally. When it is open, it can smoothly guide the discharge path. The air-compressed fresh agricultural product pushing mechanism uses airflow to assist in discharge, without the need for mechanical hard pushing, which can protect the appearance of fresh agricultural products and accelerate the discharge rate of fresh agricultural products. The entire system is integrated and deployed based on the existing output baffle 1 4 and output baffle 2 5. The structure is compact and regular, and the movement of each component avoids interference with each other. It has a high degree of automation and can adapt to the needs of continuous multi-specification precise grading and discharge of fresh agricultural products.

[0041] In another embodiment of the present invention, the air-compressed fresh agricultural product pushing mechanism includes a high-pressure air pipe 43 and multiple jet pipes 44 installed on the output baffle 4. The multiple jet pipes 44 are all connected to the high-pressure air pipe 43. The multiple jet pipes 44 are distributed in groups and are respectively set with multiple discharge ports 31 for spraying high-pressure air to assist in the discharge. The exhaust ends of the multiple jet pipes 44 are flush with the inner side of the output baffle 4 to avoid scratching the surface of the fresh agricultural products. Solenoid valves 45 are installed on the multiple jet pipes 44. Multiple controllers 46 are installed on the output baffle 4 to control the jet volume. A high-pressure air storage tank 47 and an air pump 48 are fixedly installed on the output baffle 4 and the output baffle 5, and the two are connected. The high-pressure air storage tank 47 is connected to the high-pressure air pipe 43, and a pressure gauge 49 is installed on the high-pressure air storage tank 47.

[0042] In this embodiment, the air pump 48 replenishes and pressurizes the high-pressure air storage tank 47, which then delivers the pressure-stabilized gas to the high-pressure air pipe 43. The jet pipes 44 corresponding to each discharge port 31 are connected to the high-pressure air pipe 43. The controller 46 controls the opening and closing of the solenoid valves 45 at the corresponding positions as needed. After opening, the jet pipes 44 spray out high-pressure airflow to propel the fresh agricultural products on the output conveyor belt 2, allowing the fresh agricultural products to be smoothly discharged from the corresponding discharge port 31. The pressure gauge 49 displays the air pressure status inside the high-pressure air storage tank 47 in real time, facilitating real-time observation of the air pressure conditions during operation. The high-pressure air tank 47, in conjunction with the air pump 48, can continuously and stably store high-pressure air, providing uninterrupted and stable air supply for the entire air-compressed fresh agricultural product pushing mechanism, ensuring continuous and reliable jet-assisted operation. Multiple jet pipes 44 are grouped and set up corresponding to each discharge port 31, enabling fixed-point and directional jetting, accurately pushing and discharging fresh agricultural products of corresponding specifications, with strong sorting and alignment. The exhaust end of the jet pipe 44 is flatly embedded inside the output baffle 4, without forming protruding edges, which can effectively prevent scratching the surface of fresh agricultural products during transportation and protect the appearance and quality of fresh agricultural products. The solenoid valve 45 and the controller 46 work together to independently control the opening and closing of each group of jet pipes 44 and the jetting conditions, adapting to different fresh agricultural product pushing needs, with flexible and precise control. The pressure gauge 49 can provide real-time feedback on the internal air pressure status of the high-pressure air tank 47, making it easy to keep track of the working status of the air circuit, facilitating daily operation and maintenance and pressure adjustment, and improving the stability and controllability of the entire mechanism.

[0043] In summary, compared with related technologies, this device, through the multi-directional deployment of CCD industrial cameras 10, combined with the light-shielding cylinder shell 6, light source 12, and background plate 11 to form a closed light-shielding detection space, can collect images of agricultural products from multiple angles without obstruction, avoiding the problems of shadows and blind spots caused by the placement of fresh agricultural products, and realizing all-round measurement of the volume of fresh agricultural products without dead angles.

[0044] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A device for measuring the volume of fresh agricultural products, characterized in that, include: An input conveyor belt and an output conveyor belt, wherein the input conveyor belt is located diagonally above the feed side of the output conveyor belt; The input transmission belt is installed on the input baffles on both sides, and the output transmission belt is installed on the output baffle one and the output baffle two on both sides; A light-shielding cylindrical shell is provided between the input conveyor belt and the output conveyor belt. The light-shielding cylindrical shell is located below the input conveyor belt, and the discharge end of the light-shielding cylindrical shell is fixedly connected to the output baffle one and the output baffle two. A light-transmitting tube is fixedly installed inside the light-shielding cylinder shell for measuring fresh agricultural products. The discharge end of the light-transmitting tube extends above the feed side of the output conveyor belt. A guide tube is fixedly installed at the top of the light-transmitting tube. The top end of the guide tube penetrates the light-shielding cylinder shell and extends below the discharge end of the input conveyor belt. A material-gathering arc plate is fixedly installed at the top end of the guide tube. The material-gathering arc plate is connected to the discharge end of the input conveyor belt for introducing fresh agricultural products. Three CCD industrial cameras are fixedly installed on the light-shielding cylinder shell at an angle to each other. The angle of each of the three CCD industrial cameras is 120°. The recognition end of each of the three CCD industrial cameras is set towards the light-transmitting tube for recognizing the fresh agricultural products inside. A background plate and a light source are set opposite each of the three CCD industrial cameras. The background plate and the light source are both located inside the light-shielding cylinder shell and face the light-transmitting tube. A light-shielding tail cylinder is fixedly installed at the tail end of the light-transmitting tube. The light-shielding tail cylinder passes through the tail end of the light-shielding cylinder shell. The inner diameters of the light-shielding tail cylinder and the light-transmitting tube are equal. The same cleaning scraper is slidably installed inside the light-shielding tail cylinder and the light-transmitting tube. When it slides, it is used to push the fresh agricultural products out of the light-transmitting tube and discharge them to the output conveyor belt, and to clean the inner wall of the light-transmitting tube.

2. The fresh agricultural product volume measuring device as described in claim 1, characterized in that, The tail end of the light-shielding tail tube is slidably installed with a discharge sealing plate. The discharge sealing plate is fixedly connected to the cleaning scraper and is used to block the discharge end of the guide tube when it slides with the cleaning scraper to avoid material jamming. The discharge sealing plate is arc-shaped.

3. The fresh agricultural product volume measuring device as described in claim 2, characterized in that, A toothed assembly is fixedly installed at the bottom of the feeding sealing plate. A sliding opening is provided on the feeding sealing plate. A drive shaft is rotatably installed on the light-shielding tail cylinder and the light-shielding cylinder shell. The drive shaft passes through the sliding opening to accommodate the sliding of the feeding sealing plate. A spur gear is fixedly sleeved on the drive shaft. The spur gear meshes with the toothed assembly and is used to drive the feeding sealing plate and the cleaning scraper to move. A push motor is fixedly installed on the side of the light-shielding cylinder shell. The output shaft of the push motor is fixedly connected to the end of the drive shaft.

4. The fresh agricultural product volume measuring device as described in claim 2, characterized in that, A rectangular guide plate is fixedly installed between the input sides of the first and second output baffles. The rectangular guide plate is located above the discharge end of the output conveyor belt and the light-transmitting tube. A cleaning screw is rotatably installed between the input sides of the first and second output baffles. The cleaning screw and the rectangular guide plate are at the same height and are arranged parallel to each other. The same cleaning scraper is sleeved on the rectangular guide plate and the cleaning screw. The scraper is used to slide and clean the surface of the light-transmitting tube when the pushing side of the scraper is parallel to the discharge end of the light-transmitting tube.

5. The fresh agricultural product volume measuring device as described in claim 4, characterized in that, Both the first and second output baffles are provided with cleaning ports, and both cleaning ports correspond to the cleaning scraper and are used to clean the cleaning scraper.

6. The fresh agricultural product volume measuring device as described in claim 1, characterized in that, Two guide plates are fixedly installed on the feed side of the material-gathering arc plate. Both guide plates are connected to the top of the input conveyor belt for introducing fresh agricultural products.

7. The fresh agricultural product volume measuring device as described in claim 1, characterized in that, Multiple buffer rubber sheets are fixedly installed inside the feed tube. These buffer rubber sheets are evenly distributed in a circular array to cushion the falling fresh agricultural products.

8. The fresh agricultural product volume measuring device as described in claim 4, characterized in that, A lifting strip is fixedly installed between the first output baffle and the second output baffle. The lifting strip is at the same height as the rectangular guide plate. Multiple buffer rubber curtains are fixedly installed at the bottom of the lifting strip. The buffer rubber curtains are located on the side of the cleaning scraper away from the light-transmitting tube and are used to buffer the fresh agricultural products discharged from the light-transmitting tube.

9. The fresh agricultural product volume measuring device as described in claim 1, characterized in that, An input motor is fixedly installed on the side of the input baffle. The output shaft of the input motor is connected to the input end of the input conveyor belt to drive the input conveyor belt. An output motor is fixedly installed on the side of the output baffle. The output shaft of the output motor is connected to the input end of the output conveyor belt to drive the output conveyor belt.

10. The fresh agricultural product volume measuring device as described in claim 1, characterized in that, The output baffle 2 is provided with multiple discharge ports, and the specifications of the multiple discharge ports are arranged in sequence to discharge fresh agricultural products of different specifications respectively.

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