Walnut spectrum automatic acquisition and identification system

Abstract

The invention relates to the technical field of agricultural product nondestructive testing, in particular to a walnut spectrum automatic acquisition and recognition system which comprises a workbench, a balance plate, a sample processing unit, an adjusting unit and a spectrum acquisition unit. Aiming at the problem that a sample is difficult to fix, a sample clamping module is designed; automatic clamping and loosening of samples are achieved, and the device can adapt to samples of different sizes; meanwhile, a sample rotating module is designed, so that the sample can rotate in the collection process, and spectrum collection can be carried out on the sample at different angles; in order to improve the collection efficiency and precision, the adjustment module drives the linkage module and the approaching module to realize flexible adjustment of the position of the collection probe, and the spectrum collection unit transmits the collected data to the upper computer for analysis, so that the problems of difficulty in sample fixation, low collection efficiency and precision and the like in a traditional detection mode are solved; and the performance of the walnut spectrum automatic acquisition and identification system is improved.

Description

Technical Field

[0001] This invention relates to the field of non-destructive testing technology for agricultural products, specifically an automatic spectral acquisition and identification system for walnuts. Background Technology

[0002] Walnuts are highly susceptible to rancidity during long-term storage. Walnuts are high in fat, primarily unsaturated fatty acids, which are easily oxidized and decompose to produce free radicals. These free radicals further react with oxygen to form peroxides. There is also a phenomenon in the market of using long-stored walnuts to impersonate fresh walnuts for processing and sale. This not only seriously disrupts market order but may also pose a health risk to consumers.

[0003] Rancidity in walnuts is a deterioration phenomenon that occurs inside the walnut. Traditional testing methods involve cracking the shell, removing the kernel, and then performing physicochemical experiments to determine the fatty acid content. This method is not only time-consuming and labor-intensive but also damages the integrity of the walnut. Therefore, there is an urgent need to develop a non-destructive testing method to confirm whether a whole walnut has become rancid.

[0004] This study aims to develop a rapid, non-destructive method for detecting rancidity in walnuts using near-infrared spectroscopy, providing a scientific basis for walnut storage and sales, helping companies better manage inventory, and reducing quality decline and economic losses. Summary of the Invention

[0005] This invention aims to solve many problems in traditional walnut detection methods, addressing issues such as difficulty in sample fixation, low collection efficiency and accuracy, and improving the performance of the automatic walnut spectral acquisition and identification system.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution: an automatic walnut spectrum acquisition and identification system, the system is set on the side of the infrared spectrum detection and conveying line, including a workbench and a balance plate set on the upper end of the workbench, a sample processing unit is installed on the upper end of the balance plate, an adjustment unit is set on the side of the sample processing unit, a spectrum acquisition unit is installed on the upper end of the adjustment unit, and the spectrum acquisition unit is electrically connected to the host computer.

[0007] The sample processing unit includes a stage, on the upper end of a balance plate. The stage is a hollow structure, with symmetrical strip tracks on both sides of the upper end of the stage. A vertical plate is slidably installed inside the strip tracks. A sample rotation module is rotatably installed in the middle of the stage. A compression spring is fixedly installed between the vertical plate and the side wall of the strip tracks. A clamping block is fixedly connected to the upper end of the vertical plate.

[0008] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0009] The positive and progressive effects of this invention are as follows:

[0010] 1. By utilizing the self-adaptive and flexible enclosure of the compression spring, the automatic clamping and releasing of the sample is achieved. The structure of the clamping block can adapt to samples of different sizes, solving the problem of difficult walnut fixation. At the same time, a sample rotation module is designed so that the sample can rotate during the collection process, so as to collect the spectrum of the sample from different angles and improve the comprehensiveness of the collection.

[0011] 2. By adjusting the linkage module and the proximity module, the position of the acquisition probe can be flexibly adjusted, allowing it to get closer to the sample for spectral acquisition more accurately, thus improving the accuracy and efficiency of the acquisition. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the first overall three-dimensional structure of the present invention.

[0013] Figure 2 In this invention Figure 1 A schematic diagram of the overall three-dimensional structure after removing the infrared spectroscopy detection delivery line.

[0014] Figure 3 In this invention Figure 2 A schematic diagram of the three-dimensional connection structure after the shell is removed.

[0015] Figure 4 This is a schematic diagram of the three-dimensional connection structure between the workbench, the balance plate, and the sample processing unit in this invention.

[0016] Figure 5 In this invention Figure 4 A schematic diagram of the internal three-dimensional structure.

[0017] Figure 6 In this invention Figure 5 A magnified structural diagram at point A.

[0018] Figure 7 This is a schematic diagram of the three-dimensional connection structure between the sample rotation module and the linkage module in this invention.

[0019] Figure 8 This is a three-dimensional structural diagram of the adjustment unit in this invention.

[0020] Figure 9 In this invention Figure 8 A magnified structural diagram at point B.

[0021] Figure 10 This is a flowchart illustrating the operation of the infrared spectroscopy detection and delivery line in this invention.

[0022] Figure 11 This is a flowchart of the automatic walnut spectrum acquisition and identification system of the present invention.

[0023] In the attached image:

[0024] 1. Workbench; 2. Balance board;

[0025] 3. Sample processing unit; 31. Stage; 32. Strip slide; 33. Vertical plate; 34. Sample rotation module; 341. Vertical rod; 342. Gear plate; 343. Support plate; 344. Flexible enclosure; 35. Compression spring; 36. Clamping block; 361. Ball bearing;

[0026] 4. Adjustment unit; 41. Support column; 42. Adjustment module; 421. Drive motor; 422. Adjustment gear; 423. Incomplete gear; 424. Rotating rod; 425. Horizontal shaft;

[0027] 43. Linkage module; 431. Gear plate; 432. Irregularly shaped rod; 433. Linkage rod; 434. Tension spring; 435. Rectangular rack;

[0028] 44. Support plate; 45. Proximity module; 451. Side plate; 452. Proximity rod; 453. Electric push rod; 454. Proximity plate;

[0029] 5. Spectral acquisition unit; 51. Acquisition probe; 52. Fiber optic bundle; 53. Spectrometer;

[0030] 100. Conveyor; 200. Power source; 300. Infrared spectrometer; 400. Transfer robotic arm; 500. Sampling and placement platform. Detailed Implementation

[0031] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments.

[0032] Example 1:

[0033] like Figure 1 and Figure 11 An automatic walnut spectrum acquisition and identification system is disclosed. The system is installed on the side of an infrared spectrum detection conveyor line and includes a workbench 1 and a balance plate 2 installed on the upper end of the workbench 1. The infrared spectrum detection conveyor line includes a conveyor 100. An infrared spectrometer 300 is installed on the upper side of one end of the conveyor 100. A transfer robotic arm 400 is installed on the side of the infrared spectrometer 300. The transfer robotic arm 400 is connected to a power source 200 installed on the side of the conveyor 100. A sampling placement table 500 is installed on the upper end of the conveyor 100 at the position on the side of the transfer robotic arm 400.

[0034] In practice, the conveyor 100 is started, and the walnuts are placed on the conveyor 100. The walnuts will be transported along with the conveyor 100. After preliminary detection by the infrared spectrometer 300, they will continue to be transported to the transfer robotic arm 400. When sampling is required, the power source 200 provides power output to the transfer robotic arm 400, thereby transferring the walnuts to be sampled to the sampling placement table 500. Then, they are manually placed into the sample processing unit 3 for further testing.

[0035] Example 2:

[0036] The technical solution is basically the same as that in Embodiment 1, see below. Figures 2 to 7 as well as Figure 11 The difference lies in the following: a sample processing unit 3 is installed on the upper end of the balance plate 2. The sample processing unit 3 includes a stage 31. The stage 31 is a hollow structure. A strip-shaped slide 32 is symmetrically opened on both sides of the upper end of the stage 31. A vertical plate 33 is slidably installed in the strip-shaped slide 32. A sample rotation module 34 is rotatably installed in the middle of the stage 31. A compression spring 35 is fixedly installed between the vertical plate 33 and the side wall of the strip-shaped slide 32. A clamping block 36 is fixedly connected to the upper end of the vertical plate 33.

[0037] The sample rotation module 34 includes a vertical rod 341 rotatably mounted on the bottom inner side of the platform 31. A toothed disc 342 is fixedly mounted in the middle of the vertical rod 341. A bearing plate 343 is fixedly connected to the upper end of the vertical rod 341. The bearing plate 343 has a downwardly concave arc-shaped structure in the middle. A flexible barrier 344 is fixedly mounted on the edge of the bearing plate 343. The flexible barrier 344 has a ring structure with a larger opening at the top and a smaller opening at the bottom, and its inner wall is provided with anti-slip texture.

[0038] The clamping block 36 is made of rubber material, and its opposite sidewalls are in an inwardly concave arc structure. Roller balls 361 are symmetrically rotated on its concave inner wall. A pressure sensor is installed inside the clamping block 36, and the roller balls 361 are located inside the clamping block 36 and are in contact with the sensing head of the pressure sensor.

[0039] In practice, the walnuts on the upper end of the sampling platform 500 are manually placed vertically onto the bearing plate 343 inside the clamping block 36, and the edge of the flexible enclosure 344 is made to fit against the lower surface of the sample walnut. Under the action of the compression spring 35, the clamping block 36 can adaptively clamp and fix it. The host computer is then started, and a spectral acquisition command is sent through the host computer.

[0040] Example 3:

[0041] The technical solution is basically the same as that in Embodiment 1, see below. Figure 2 , Figure 3 , Figure 5 , Figure 7 , Figure 8 , Figure 9 and Figure 11 The difference is that the sample processing unit 3 is provided with an adjustment unit 4 on its side, and a spectral acquisition unit 5 is installed on the upper end of the adjustment unit 4. The spectral acquisition unit 5 is electrically connected to the host computer.

[0042] The adjustment unit 4 includes a support column 41 disposed on the side of the workbench 1. An installation groove is provided in the middle of the upper end of the support column 41. An adjustment module 42 is rotatably installed in the installation groove. A linkage module 43 is fixedly connected to the side of the adjustment module 42. A support plate 44 is fixedly connected to the upper end of the adjustment module 42. A proximity module 45 is fixedly connected to the upper end of the support plate 44.

[0043] The adjustment module 42 includes a drive motor 421 fixedly installed on the side wall of the support column 41. The output shaft of the drive motor 421 passes through the mounting groove and an adjustment gear 422 is fixedly installed in the middle. An incomplete gear 423 meshes above the adjustment gear 422. The incomplete gear 423 is fixedly installed at the lower end of the rotating rod 424. The rotating rod 424 is fixedly installed on the horizontal shaft 425. The horizontal shaft 425 is rotatably installed in the mounting groove.

[0044] The linkage module 43 includes a toothed plate 431 that is slidably installed at the bottom of the mounting groove. The upper side of the toothed plate 431 meshes with the adjusting gear 422. The side of the toothed plate 431 is fixedly connected to the linkage rod 433 by a special-shaped rod 432.

[0045] The linkage rod 433 slides through the interior of the platform 31 and its end is fixedly connected to a tension spring 434. The other end of the tension spring 434 is fixedly connected to the inner wall of the platform 31. A rectangular rack 435 is fixedly installed on the linkage rod 433 near the middle of the tension spring 434. The rectangular rack 435 and the gear plate 342 mesh with each other.

[0046] The proximity module 45 includes a side plate 451 fixedly installed on the upper side of the support plate 44, a proximity rod 452 slidably installed in the middle of the side plate 451, an electric push rod 453 fixedly connected to one end of the proximity rod 452, the lower end of the electric push rod 453 fixedly installed in the middle of the upper end of the support plate 44, and a proximity plate 454 fixedly installed at the other end of the proximity rod 452.

[0047] The spectral acquisition unit 5 includes an acquisition probe 51 fixedly installed near the middle of the plate 454. The upper end of the acquisition probe 51 is connected to the spectrometer 53 via an optical fiber bundle 52. The spectrometer 53 is fixedly installed on the horizontal surface at the lower end of the workbench 1.

[0048] In this embodiment, a protective housing is provided on the outside of the adjustment unit 4. This housing can be disassembled to facilitate the repair or maintenance of its internal components. For details, please refer to [reference needed]. Figure 2 .

[0049] In specific operation, after the sample walnut is clamped and fixed, the electric push rod 453 is activated. The electric push rod 453 drives the proximity rod 452, the proximity plate 454 and the acquisition probe 51 to move downward and bring the acquisition probe 51 closer to the sample walnut. Then the spectrometer 53 is turned on. At this time, the acquisition probe 51 can perform high-speed scanning of the sample walnut, obtain characteristic spectral data, automatically process the data and call the trained model to perform quality judgment, and upload the judgment result to the host computer.

[0050] During the high-speed scanning process of the acquisition probe 51, the drive motor 421 is started, which drives the adjusting gear 422 to rotate. Under the action of the incomplete gear 423, the rotating rod 424 will drive the support plate 44 and the entire proximity module 45 to rotate, thereby increasing the acquisition range of the acquisition probe 51.

[0051] During the rotation of the adjusting gear 422, the meshing action between the adjusting gear 422 and the toothed plate 431 will also drive the toothed plate 431 to reciprocate, thereby driving the irregular rod 432 to reciprocate synchronously. At this time, due to the presence of the tension spring 434, the linkage rod 433 will drive the rectangular rack 435 to reciprocate. Under the meshing action of the toothed plate 342, the vertical rod 341 will drive the bearing plate 343 and the sample walnut on the upper end of the bearing plate 343 to rotate, thereby improving the comprehensiveness of spectral acquisition and ensuring the accuracy of the identification results.

[0052] During the rotation of the sample walnut, the ball bearings 361 on the inner wall of the clamping block 36 always fit against the side wall of the sample walnut. The ball bearings 361 can roll freely, reducing friction between them. Regardless of the shape of the sample walnut, the concave inner wall of the clamping block 36 can adaptively fit against the sample walnut. The controller inside the pressure sensor can receive and process the squeezing force on the sample walnut, thereby outputting a control command. This control command can be fed back to the speed controller inside the drive motor 421, thereby automatically adjusting the speed of the drive motor 421 to control the rotation speed of the sample walnut. When the sample walnut is squeezed too much, the speed of the drive motor 421 decreases to avoid damaging the sample walnut. When the sample walnut is squeezed too little, the speed of the drive motor 421 increases to ensure the stability of the sample walnut detection.

[0053] The working principle of this invention during use:

[0054] Start the conveyor 100 and place the walnuts on the conveyor 100. At this time, the walnuts will be transported with the conveyor 100. After preliminary detection by the infrared spectrometer 300, they will continue to be transported to the transfer robot arm 400. When sampling is required, the power source 200 provides power output to the transfer robot arm 400, thereby transferring the walnuts to be sampled to the sampling placement table 500.

[0055] The walnuts on the upper end of the sampling platform 500 are manually placed vertically onto the bearing plate 343 inside the clamping block 36, and the edge of the flexible enclosure 344 is made to fit against the lower surface of the sample walnut. At this time, the clamping block 36 will separate to both sides, and the compression spring 35 will be compressed. Then, the sample walnuts are manually removed. Under the action of the reaction force of the compression spring 35, the clamping block 36 can adaptively clamp and fix them. The host computer is started and a spectral acquisition command is sent through the host computer.

[0056] Start the electric push rod 453, which drives the proximity rod 452, proximity plate 454 and acquisition probe 51 to move downward and bring the acquisition probe 51 close to the sample walnut. Then turn on the spectrometer 53. At this time, the acquisition probe 51 can perform high-speed scanning on the sample walnut, acquire characteristic spectral data, automatically process the data, call the trained model to perform quality judgment, and upload the judgment result to the host computer.

[0057] During the high-speed scanning process of the acquisition probe 51, the drive motor 421 is started, which drives the adjusting gear 422 to rotate. Under the action of the incomplete gear 423, the rotating rod 424 will drive the support plate 44 and the entire proximity module 45 to rotate, thereby increasing the acquisition range of the acquisition probe 51.

[0058] During the rotation of the adjusting gear 422, the meshing action between the adjusting gear 422 and the toothed plate 431 will also drive the toothed plate 431 to reciprocate, thereby driving the irregular rod 432 to reciprocate synchronously. At this time, due to the presence of the tension spring 434, the linkage rod 433 will drive the rectangular rack 435 to reciprocate. Under the meshing action of the toothed plate 342, the vertical rod 341 will drive the bearing plate 343 and the sample walnut on the upper end of the bearing plate 343 to rotate, thereby improving the comprehensiveness of spectral acquisition and ensuring the accuracy of the identification results.

[0059] During the rotation of the sample walnut, the ball bearings 361 on the inner wall of the clamping block 36 always fit against the side wall of the sample walnut. The ball bearings 361 can roll freely, reducing friction between them. Regardless of the shape of the sample walnut, the concave inner wall of the clamping block 36 can adaptively fit against the sample walnut. The controller inside the pressure sensor can receive and process the squeezing force on the sample walnut, thereby outputting a control command. This control command can be fed back to the speed controller inside the drive motor 421, thereby automatically adjusting the speed of the drive motor 421 to control the rotation speed of the sample walnut. When the sample walnut is squeezed too much, the speed of the drive motor 421 decreases to avoid damaging the sample walnut. When the sample walnut is squeezed too little, the speed of the drive motor 421 increases to ensure the stability of the sample walnut detection.

[0060] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. A walnut spectral automatic acquisition and identification system, the system being installed on the side of an infrared spectral detection conveyor line, comprising a worktable and a balance plate installed at the upper end of the worktable, characterized in that: A sample processing unit is installed on the upper end of the balance plate, an adjustment unit is provided on the side of the sample processing unit, a spectral acquisition unit is installed on the upper end of the adjustment unit, and the spectral acquisition unit is connected to the host computer. The sample processing unit includes: The stage is mounted on the upper part of the balance plate, and the stage is a hollow structure. The platform features symmetrical strip-shaped slides on both sides of its upper end. Vertical plates are slidably installed within the strip track; The sample rotation module is rotatably mounted in the middle of the stage. A compression spring is fixedly installed between the upright plate and the side wall of the strip slide. A clamping block is fixedly connected to the upper end of the upright plate.

2. The walnut spectral automatic acquisition and identification system as described in claim 1, characterized in that: The sample rotation module includes a vertical rod rotatably mounted on the bottom inner side of the stage, a geared disc fixedly mounted in the middle of the vertical rod, a support plate fixedly connected to the upper end of the vertical rod, and a flexible enclosure fixedly mounted on the edge of the support plate; and / or The bearing plate has a downward-concave arc-shaped structure in the middle; and / or The flexible fencing has a ring-shaped structure with a larger opening at the top and a smaller opening at the bottom, and its inner wall has anti-slip texture.

3. The walnut spectral automatic acquisition and identification system as described in claim 2, characterized in that: The clamping block is made of rubber material, and its opposite sidewalls are in an inwardly concave arc structure. Ball bearings are symmetrically rotated on its concave inner wall. A pressure sensor is installed inside the clamping block, and the ball bearings are located inside the clamping block and are in contact with the sensing head of the pressure sensor.

4. The walnut spectral automatic acquisition and identification system as described in claim 2, characterized in that: The adjustment unit includes a support column located on the side of the workbench. A mounting groove is provided in the middle of the upper end of the support column. An adjustment module is rotatably installed in the mounting groove. A linkage module is fixedly connected to the side of the adjustment module. A support plate is fixedly connected to the upper end of the adjustment module. A proximity module is fixedly connected to the upper end of the support plate.

5. The walnut spectral automatic acquisition and identification system as described in claim 2, characterized in that: The adjustment module includes a drive motor fixedly installed on the side wall of the support column. The output shaft of the drive motor passes through the mounting groove and an adjustment gear is fixedly installed in the middle of it. An incomplete gear meshes above the adjustment gear. The incomplete gear is fixedly installed at the lower end of the rotating rod. The rotating rod is fixedly installed on the horizontal shaft, and the horizontal shaft is rotatably installed in the mounting groove.

6. The walnut spectral automatic acquisition and identification system as described in claim 1, characterized in that: The linkage module includes a toothed plate that is slidably installed at the bottom of the mounting slot. The upper side of the toothed plate meshes with an adjusting gear, and a linkage rod is fixedly connected to the side of the toothed plate by a special-shaped rod.

7. The walnut spectral automatic acquisition and identification system as described in claim 1, characterized in that: The linkage rod slides through the interior of the platform and is fixedly connected to a tension spring at one end. The other end of the tension spring is fixedly connected to the inner wall of the platform. A rectangular rack is fixedly installed on the linkage rod near the middle of the tension spring, and the rectangular rack and the gear plate mesh with each other.

8. The walnut spectral automatic acquisition and identification system as described in claim 1, characterized in that: The proximity module includes a side plate fixedly installed on the upper side of the support plate, a proximity rod slidably installed in the middle of the side plate, an electric push rod fixedly connected to one end of the proximity rod, the lower end of the electric push rod fixedly installed in the middle of the upper side of the support plate, and a proximity plate fixedly installed at the other end of the proximity rod.

9. A walnut spectral automatic acquisition and identification system as described in any one of claims 1-8, characterized in that: The spectral acquisition unit includes an acquisition probe fixedly installed near the center of the plate, and the upper end of the acquisition probe is connected to the spectrometer via an optical fiber bundle.

10. The walnut spectral automatic acquisition and identification system as described in claim 9, characterized in that: The infrared spectroscopy detection conveyor line includes a conveyor, an infrared spectroscopy detector is installed on the upper side of one end of the conveyor, a transfer robotic arm is installed on the side of the infrared spectroscopy detector, the transfer robotic arm is connected to a power source installed on the side of the conveyor, and a sampling placement platform is installed on the upper end of the conveyor at the position on the side of the transfer robotic arm.

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