Fruit cup for synchronously detecting internal and external quality of long-strip-shaped fruits and vegetables and detection system thereof

Abstract

The invention discloses a fruit cup for synchronously detecting the internal and external quality of long-strip-shaped fruits and vegetables and a detection system thereof, which comprises a fruit cup and a detection system for simultaneously detecting the internal quality and the external quality of the long-strip-shaped fruits and vegetables through the fruit cup, each fruit cup comprises an outer frame used for bearing the long-strip-shaped fruits and vegetables, a turnover mechanism used for driving the long-strip-shaped fruits and vegetables to turn over by 360 degrees and a light transmission mechanism, the fruit cups are arranged on the detection rack in order, the fruit cups are driven to move through the circulating conveying chain, meanwhile, the turnover wheels rotate, the long-strip-shaped fruits and vegetables can rotate along with the turnover wheels, and the fruit cups are driven by the light transmission mechanism. The high-speed camera captures image information in the process in real time, all-around external images of the long-strip-shaped fruits and vegetables are collected, meanwhile, light rays penetrate through the interiors of the long-strip-shaped fruits and vegetables and are transmitted to the spectrograph through the forked optical fibers, and the internal quality of the fruits and vegetables is detected. By adopting an internal and external synchronous detection mode, more comprehensive and accurate fruit and vegetable quality information can be obtained, the diversified requirements of high-quality fruits and vegetables are met, and the sorting accuracy and efficiency are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural intelligent equipment, in particular to a fruit cup for synchronous detection of the internal and external quality of long-strip fruits and vegetables and a detection system thereof. BACKGROUND

[0002] Fruits and vegetables are an essential part of our daily life. After picking, fruits and vegetables need to be sorted for storage, sales and other links. However, the current sorting is mainly done by manual sorting, which is inefficient and labor-intensive and is not suitable for future development trends.

[0003] To overcome the drawbacks of manual sorting, machine sorting processing equipment has appeared on the market to replace manual sorting and improve sorting efficiency. The fruit cup device is an important part of the machine sorting processing equipment, which is used to carry the sorted products for detection. For example, patent No. CN214132841U discloses an automatic sorting equipment for round-like fruits and vegetables based on multiple indicators. The driven transmission device, the device, the internal quality detection device, the grading and collecting device, and the driving transmission device are sequentially arranged on the rack from the driven side to the driving side. The conveying chain is arranged on the rack and guided to rotate downward by the driving transmission device and the driven transmission device. The length direction of the conveying chain is consistent with the length direction of the rack. The weighing device is arranged on the upper half of the conveying chain through the support. The internal quality detection device is located in the middle of the conveying chain. The grading and collecting device is located in the lower half of the conveying chain. The single-side overturning fruit cup group is installed on the outer surface of the conveying chain. The structure greatly improves the sorting efficiency and overcomes the shortcomings of traditional sorting.

[0004] However, the grading equipment with the above structure on the market has the following defects:

[0005] On the one hand, the existing grading equipment and matching fruit cups are mostly designed for spherical fruits and vegetables, such as oranges and apples. These fruits and vegetables have regular shapes, which are convenient for the fruit cup to stably carry and detect. However, there are many types of fruits and vegetables, and long-strip fruits and vegetables such as peppers, cucumbers, and eggplants also occupy a considerable share in the market. Since there is currently a lack of fruit cup devices specifically designed for long-strip fruits and vegetables, the existing fruit cups cannot effectively carry and detect these fruits and vegetables. When long-strip fruits and vegetables enter the fruit cup, they are prone to tilting, rolling, or jamming, which leads to inaccurate detection positions and makes it difficult to obtain comprehensive and accurate detection data. As a result, long-strip fruits and vegetables are difficult to achieve automatic processing in the sorting process and can only continue to rely on manual sorting, limiting the application range of the sorting equipment.

[0006] On the other hand, the existing sorting equipment on the market has great deficiencies in detection function due to the limitations of the fruit cup device. During the detection process, it can only detect the external characteristics (such as size, color, surface defects, etc.) or internal quality (such as sugar content, mold heart disease, etc.) of fruits and vegetables on a single side. For example, some devices can only detect the appearance defects of fruits and vegetables through image recognition technology, but cannot assess their internal nutritional components or maturity at the same time; or can only detect the internal quality by using near-infrared spectroscopy technology, but cannot take into account the screening of external morphology. This single detection method cannot comprehensively and accurately evaluate the quality of fruits and vegetables, and it is difficult to meet the diversified needs of the market for high-quality fruits and vegetables.

[0007] More importantly, in the existing detection process, due to the defects in the contact mode, material selection and detection action design of the fruit cup device and fruits and vegetables, it is easy to damage the skin of fruits and vegetables. As an important barrier to protect the internal tissue, once damaged, it will not only affect the appearance quality of fruits and vegetables and reduce their market price, but also provide a way for microbial invasion, accelerate the rotting and deterioration of fruits and vegetables, shorten the storage and shelf life of fruits and vegetables, and cause economic losses to fruit and vegetable producers and sellers.

[0008] In view of the many problems existing in the prior art, a fruit cup device and a matching detection equipment capable of adapting to different shaped fruits and vegetables, realizing synchronous detection of internal and external quality and effectively protecting the skin of fruits and vegetables are developed. SUMMARY

[0009] The purpose of the present application is to overcome the defects and deficiencies existing in the prior art, and to provide a fruit cup and a detection system for synchronous detection of the internal and external quality of long strip-shaped fruits and vegetables, which solves the various problems existing in the prior art.

[0010] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0011] A fruit cup for synchronous detection of the internal and external quality of long strip-shaped fruits and vegetables, comprising an external frame for bearing the long strip-shaped fruits and vegetables to be detected and a turnover mechanism for driving the long strip-shaped fruits and vegetables to be detected to turn over, the external frame comprising spaced apart swing plates located on both sides, a middle connecting plate being further arranged between the swing plates, and the swing plates and the middle connecting plate being spaced apart, the turnover mechanism comprising a rotating shaft, the rotating shaft being sleeved with spaced apart turnover wheels, the turnover wheels being located in the interval between the swing plates and the middle connecting plate.

[0012] The swing plates and the middle connecting plates have the same structure and shape, and arc-shaped grooves are respectively arranged therein, and the arc-shaped grooves are extended and expanded outward through arc-shaped surfaces on both sides and are connected to the wedge surfaces at the ends, and the swing plates and the middle connecting plates are fixedly arranged through end plates at both ends.

[0013] The rotating shaft is provided with a turning wheel group with the same spacing as the swing plate and the middle connecting plate, and each group has two turning wheels. The two ends of the rotating shaft are respectively installed with rotating wheels for driving the rotating shaft to rotate.

[0014] The flip wheel is gear-shaped and is made of rubber.

[0015] A light-passing mechanism is also installed between the swing plate and the central connecting plate, which is staggered with the flip wheel. The light-passing mechanism includes a hollow support column, a fixed block is provided at the bottom end of the support column, a light-passing hole is provided between the fixed block and the support column, and a light-shielding rubber sleeve is installed at the top of the support column through a light-shielding sleeve.

[0016] The middle part of the support column is fixedly installed by a light-transmitting bracket. The middle part of the light-transmitting bracket is provided with a hollow sleeve for fitting and fixing the support column. Mounting plates are provided on both sides of the hollow sleeve, and the mounting plates are respectively provided with mounting holes for the rotating shaft.

[0017] The detection system of the fruit cup structure described above includes a detection stand, with circulating conveyor chains installed on both sides of the detection stand. A plurality of groups of long fruit and vegetable cups to be detected are installed between the circulating conveyor chains and are arranged in rows and circulated for carrying. The fruit cups in the same row of the fruit cup group are connected and fixed by the same rotating shaft. The two ends of the rotating shaft are respectively connected to the chain bracket on the chain through the shaft bracket. A support plate for the rotating wheel to roll is provided on the inner side of the chain. An inspection station is provided in the middle of the detection stand, an image information acquisition device is provided above the inspection station, and a spectral information acquisition device is provided below the inspection station and is arranged in coordination with the position of the light hole.

[0018] The image information acquisition device includes a high-speed camera and a halogen lamp mounted on the inspection station through a bracket. When the circulating conveyor chain drives the fruit cup group through the inspection station, the high-speed camera will collect external image information of fruits and vegetables under the illumination of the halogen lamp. Finally, the high-speed camera will transmit the collected external image information to the computer.

[0019] The spectral information adopting device includes an optical fiber mechanism, a bifurcated optical fiber and a spectrometer. The optical fiber probe of the optical fiber mechanism receives light information from the light hole and transmits it to the spectrometer through the bifurcated optical fiber.

[0020] The optical fiber mechanism includes optical fiber probes with adjustable heights. The optical fiber probes are respectively nested on the top of the optical fiber plate. The optical fiber plate is nested in the optical fiber plate sleeve and its height can be adjusted by a knob.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The application is designed by rotating mechanism and light passing mechanism, the rotating mechanism can drive the long strip fruit and vegetable to move in a specific way, and the light passing mechanism provides necessary light conditions for internal detection, the two work together to detect the internal quality (such as sugar content, mold heart disease, etc.) and external characteristics (such as size, color, surface defects, etc.) of the long strip fruit and vegetable at the same time, and the turnover wheel rotates, the long strip fruit and vegetable will rotate with it, and the high-speed camera can capture the image information in this process in real time, so that the full range of external images of the long strip fruit and vegetable can be collected, this internal and external synchronous detection method can obtain more comprehensive and accurate fruit and vegetable quality information, meet the diversified demand of the market for high-quality fruit and vegetable, and greatly improve the accuracy and efficiency of sorting.

[0023] Moreover, the external frame of the fruit cup is carefully designed in the structure, the swing plate in the fruit cup is provided with an arc-shaped groove, and they are arranged at equal distances; this design makes the length of the fruit and vegetable perfectly match the size of the fruit cup when the long strip fruit and vegetable is carried in the fruit cup, and the outer surface of the fruit and vegetable is closely attached to the external frame of the fruit cup, so that the fruit and vegetable can remain stable during the detection process and will not fall out of the fruit cup due to shaking or movement, ensuring the continuity and accuracy of the detection process, and improving the reliability and stability of the sorting equipment.

[0024] The turnover wheel is gear-shaped, the contact area and friction force between the turnover wheel and the fruit and vegetable are increased, when the long strip fruit and vegetable moves forward in the fruit cup, the turnover wheel will rotate, and under the rotation of the turnover wheel, the long strip fruit and vegetable will rotate with it, ensuring that the turnover wheel can stably drive the fruit and vegetable to rotate, so that the high-speed camera can smoothly collect the full range of external image information, further improving the completeness and accuracy of the detection. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the application;

[0026] Figure 2 It is Figure 1 It is an enlarged view of the local structure at position 1;

[0027] Figure 3 It is a fruit cup structure schematic diagram in the application;

[0028] Figure 4 It is a fruit cup external frame diagram in the application;

[0029] Figure 5 It is a fruit cup rotating mechanism diagram in the application;

[0030] Figure 6 It is a fruit cup light passing mechanism diagram in the application;

[0031] Figure 7It is a partial enlarged view of left view of the present application;

[0032] Figure 8 It is a spectrum information collection module diagram in the present application;

[0033] Figure 9 It is an image information collection module diagram in the present application.

[0034] Reference signs:

[0035] 1, high-speed camera; 2, halogen lamp; 3, fruit cup group; 4, circulating conveying chain; 5, detection rack; 6, spectrometer; 7, computer; 8, turnover wheel; 9, swing plate; 900, arc-shaped groove; 901, arc-shaped surface; 902, wedge surface; 10, middle connecting plate; 11, rotating wheel; 12, end plate; 13, rotating shaft; 14, external frame; 15, turnover mechanism; 16, light-shielding rubber sleeve; 17, light transmission mechanism; 18, light transmission support; 181, hollow sleeve; 182, mounting plate; 183, mounting hole; 19, supporting plate; 20, supporting column; 21, fixed block; 22, shaft support; 23, chain support; 24, bifurcated optical fiber; 25, optical fiber plate sleeve; 26, knob; 27, optical fiber plate; 28, optical fiber probe; 29, optical fiber mechanism. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present application.

[0037] Reference is made to the drawings in the embodiments of the present application Figures 1-9 ;

[0038] The fruit cup for synchronous detection of the internal and external quality of long strip fruits and vegetables comprises an external frame 14 for bearing long strip fruits and vegetables to be detected and a turnover mechanism 15 for driving the turnover of the long strip fruits and vegetables to be detected, the external frame 14 comprises swing plates 9 arranged at intervals and located at both sides, a middle connecting plate 10 is further arranged between the swing plates 9, and the swing plates 9 and the middle connecting plate 10 are arranged at intervals, the turnover mechanism 15 comprises a rotating shaft 13, the rotating shaft 13 is sleeved with turnover wheels 8 arranged at intervals, and the turnover wheels 8 are located in the interval between the swing plates 9 and the middle connecting plate 10; a light transmission mechanism 17 is further installed between the swing plates 9 and the middle connecting plate 10 and staggered with the turnover wheels 8, the light transmission mechanism 17 comprises a hollow support column 20, a fixed block 21 is arranged at the bottom end of the support column 20, a light transmission hole is arranged between the fixed block 21 and the support column 20, and a light shielding rubber sleeve 16 is installed at the top end of the support column 20 through a light shielding sleeve; the middle part of the support column 20 of the light transmission mechanism is fixedly installed through a light transmission support 18, the middle part of the light transmission support 18 is provided with a hollow sleeve 181 for sleeving and fixing the support column 20, installation plates 182 are arranged at both sides of the hollow sleeve 181, and installation holes 183 corresponding to the rotating shaft 13 are respectively arranged on the installation plates 182, and the light shielding rubber sleeve 16 is nested on the support column 20 of the light transmission hole and can be attached to the long strip fruits and vegetables on the fruit cup, so that the influence of other light on the reception of light information is reduced.

[0039] In the structure, the internal and external synchronous detection is realized through the design of the rotating mechanism 15 and the light transmission mechanism 17, in the process, the rotating wheels in the rotating mechanism 15 can be used in cooperation with a high-speed camera to collect the external images of the long strip fruits and vegetables in all directions; the external frame 14 of the fruit cup is designed according to the length of the long strip fruits and vegetables, so that the fruits and vegetables are attached to the fruit cup to prevent falling when being carried; moreover, the rotating mechanism can drive the long strip fruits and vegetables to rotate 360° while being conveyed forward, and the light transmission mechanism provides necessary light conditions for internal detection, and the two work together to detect the internal quality (such as sugar content, mold heart disease, etc.) and external characteristics (such as size, color, surface defects, etc.) of the long strip fruits and vegetables at the same time. This internal and external synchronous detection method can obtain more comprehensive and accurate fruit and vegetable quality information, meet the diversified demand of the market for high-quality fruits and vegetables, greatly improve the accuracy and efficiency of sorting, and effectively solve the problem that the existing sorting equipment is limited by the design of the fruit cup device and can only detect spherical fruits and vegetables and can only detect the external or internal single side of the fruits and vegetables during detection, which cannot comprehensively and accurately evaluate the quality of the fruits and vegetables.

[0040] Furthermore, the swing plate 9 and the connecting plate 10 have the same structure and appearance. Each has an arcuate groove 900 in its center. Arc-shaped surfaces 901 extend outward on either side of the arcuate groove 900, transitioning to wedge surfaces 902 at the ends. The swing plate 9 and the connecting plate 10 are secured by end plates 12 at both ends. A set of tilting wheels 8 is mounted on the rotating shaft 13, spaced the same as the swing plate 9 and the connecting plate 10. Each set of tilting wheels 8 consists of two. Rotating wheels 11 are mounted on each end of the rotating shaft 13 to drive the rotating shaft 13 in rotation. Due to their unique shape, long fruits and vegetables are prone to falling out of the fruit cup during the sorting process, affecting the smooth progress of testing. This application, through in-depth consideration of the length of long fruits and vegetables, has carefully designed the external frame of the fruit cup. The swing plate and the central connecting plate in the fruit cup are provided with arc-shaped grooves, and they are arranged equidistantly. This design ensures that when the fruit cup carries long fruits and vegetables, the length of the fruits and vegetables can perfectly match the size of the fruit cup. At the same time, the two sides of the arc-shaped groove 900 extend outward through the arc surface 901 to transition to the wedge surface 902 at the end. This arc transition surface extends the end of the oblique block structure, ensuring that the outer surface of long fruits and vegetables of different specifications can fit tightly with the external frame of the fruit cup. This ensures that the fruits and vegetables remain stable during the testing process and will not fall out of the fruit cup due to shaking or movement, ensuring the continuity and accuracy of the testing process and improving the reliability and stability of the sorting equipment.

[0041] The flip wheel 8 is gear-shaped and made of rubber. This gear-like design increases the contact area and friction between the flip wheel and the fruit and vegetable. When the flip wheel rotates, it can more effectively drive the long, thin fruit and vegetable to rotate together. The number of teeth on the flip wheel ensures that it can rotate the fruit and vegetable under test one full rotation within the high-speed camera's field of view when passing through the inspection station. When inspecting fruits and vegetables of varying sizes, simply replacing the corresponding rotating wheel ensures that the fruit and vegetable can complete a full rotation at the inspection station. This design overcomes the problem that most long, thin fruits and vegetables have smooth outer surfaces that are prone to slipping during rotation, preventing smooth, all-around inspection. It ensures that the flip wheel can stably drive the fruit and vegetable, allowing the high-speed camera to successfully capture all-around external image information, further improving the integrity and accuracy of the inspection.

[0042] The detection system based on the above fruit cup structure comprises a detection rack 1, circulating conveying chains 4 are installed on both sides of the detection rack 1, a plurality of groups of long strip-shaped fruit and vegetable fruit cups 3 arranged in rows and spaced apart and circulating transmission for bearing are installed between the circulating conveying chains 4, the fruit cups in the same row in the fruit cup group 3 are connected and fixed through the same rotating shaft 13, the two ends of the rotating shaft 13 are connected with the chain bracket 23 on the chain through the shaft bracket 22 respectively, and the two ends of the rotating shaft 13 are rotatably installed on the shaft bracket, the shaft bracket 22 and the chain bracket 23 are connected and fixed, the connecting structure can ensure that the fruit cup 3 can move forward by moving on the chain 4 on the rack 5, a supporting plate 19 for rolling of the rotating wheel 11 is arranged on the inner side of the chain, a detection station is arranged in the middle of the detection rack 5, an image information acquisition device is arranged above the detection station, and a spectral information acquisition device is arranged below the detection station in cooperation with the light transmission hole position. The principle is that the long strip-shaped fruit and vegetable is placed in the fruit cup on the rack, and the fruit cup also moves with the chain wheel and chain transmission on the rack and drives the turnover wheel therein to rotate, so that the pepper rotates on the fruit cup by 360° without damage, the high-speed camera in the image information acquisition module is convenient for collecting all the information outside the long strip-shaped fruit and vegetable, and the photographed photos are transmitted to the computer and the external quality of the long strip-shaped fruit and vegetable is accurately identified through the target recognition algorithm. The halogen lamp around the high-speed camera will irradiate on the long strip-shaped fruit and vegetable in the fruit cup, the light transmits through the inside of the long strip-shaped fruit and vegetable and transmits the information to the spectrometer through the bifurcated optical fiber through the light transmission hole below and the optical fiber probe arranged below, the spectrometer transmits the spectral information to the computer, and the spectral information is input into the established model for prediction, and the internal quality of the long strip-shaped fruit and vegetable is obtained.

[0043] In the rotating mechanism, the turnover wheel is arranged, and cooperates with the high-speed camera in the image acquisition module, so that the problem of how to comprehensively obtain the appearance information of the long strip-shaped fruit and vegetable is ingeniously solved. When the long strip-shaped fruit and vegetable moves forward in the fruit cup, the turnover wheel rotates, and the long strip-shaped fruit and vegetable rotates under the action of the turnover wheel. The high-speed camera can capture the image information in real time, so that the all-around external image of the long strip-shaped fruit and vegetable can be collected. This design ensures that no defects or features on the surface of the fruit and vegetable are missed, and provides reliable data support for subsequent accurate sorting. Compared with the traditional detection method which can only obtain a single angle image, this design has obvious advantages.

[0044] The image information acquisition device comprises a high-speed camera 1 and a halogen lamp 2 arranged on the detection station through a support. When the fruit cup group is driven by the circulating conveying chain 4 to pass through the detection station, the high-speed camera 1 can acquire the external image information of the fruit and vegetable under the irradiation of the halogen lamp 2, and finally the high-speed camera 1 can transmit the acquired external image information to the computer 7. The spectral information acquisition device comprises a fiber mechanism 29, a bifurcated optical fiber 24 and a spectrometer 6. The optical fiber probe 28 of the fiber mechanism 29 receives the light information from the light transmission hole, and transmits the light information to the spectrometer 6 through the bifurcated optical fiber 24. The fiber mechanism comprises a height-adjustable optical fiber probe 28, which is respectively nested on the top of the optical fiber plate 27, and the optical fiber plate 27 is nested in the optical fiber plate sleeve 25 and can adjust the height through the knob 26. The light transmits through the long strip-shaped fruit and vegetable inside and through the light transmission hole below the fruit cup to transmit the information to the spectrometer through the bifurcated optical fiber with the optical fiber probe arranged below. The spectrometer transmits the spectral information to the computer, and inputs the spectral information into the established model for prediction to obtain the internal quality of the long strip-shaped fruit and vegetable.

[0045] The above-mentioned synchronous internal and external detection system for long strip-shaped fruit and vegetable comprises the following steps:

[0046] S1. Start the system power, and put the long strip-shaped fruit and vegetable into the fruit cup (which can be automatically fed by some differential feeding mechanism). While the chain rotates, the fruit cup connected with the chain also moves forward, and the rotating wheel also rotates together with the fruit cup. The shaft in the rotating mechanism rotates together with the rotating wheel and drives the rotation of the turnover wheel. The long strip-shaped fruit and vegetable rotates in the fruit cup while moving forward under the drive of the turnover wheel and the fruit cup.

[0047] S2. When the fruit cup with the long strip-shaped fruit and vegetable passes through the image acquisition module, the high-speed camera captures the image of the long strip-shaped fruit and vegetable in the target area. In the process of continuously rotating the long strip-shaped fruit and vegetable in the fruit cup through the high-speed camera capture area, the high-speed camera completes the acquisition of the external image information of the long strip-shaped fruit and vegetable under the irradiation of the halogen lamp. The high-speed camera transmits the acquired image information to the target recognition algorithm in the computer, and obtains the external quality information of the long strip-shaped fruit and vegetable through the recognition result of the target recognition algorithm.

[0048] S3. When the fruit cup with the long strip-shaped fruit and vegetable enters the image acquisition module and reaches the position directly below the camera, the light transmission hole and the optical fiber probe meet, the light of the halogen lamp reaches the optical fiber probe through the light transmission hole, and then the light is transmitted to the spectrometer through the bifurcated optical fiber to obtain the spectral information. The spectrometer transmits the spectral information to the computer to obtain the internal quality information of the long strip-shaped fruit and vegetable through the prediction of the established model.

[0049] In order to test the feasibility of the fruit cup and the detection system in automatic sorting and the accuracy of synchronous internal and external detection, the following specific embodiment test is carried out.

[0050] Test materials:

[0051] Peppers: 50 (external defects: 20, internal defects: 20, normal: 10)

[0052] Cucumbers: 50 (external defects: 20, internal defects: 20, normal: 10)

[0053] Eggplants: 50 (external defects: 20, internal defects: 20, normal: 10)

[0054] Test steps:

[0055] 1. The operator first places the three types of vegetables to be tested, peppers, cucumbers, and eggplants, in the specially designed fruit cups according to the preset arrangement and spacing. The fruit cups are smoothly moved by the circulating conveying chain, and the rotating mechanism can drive the long strip-shaped fruits and vegetables to rotate 360° while being conveyed forward, slowly passing through the detection area.

[0056] 2. When the vegetables pass through the detection area, the high-speed camera quickly starts to capture the external image information of the vegetables at a very high frame rate. These image information is transmitted in real time and accurately to the image recognition model that has been trained in advance. The external quality of the vegetables is carefully identified, including surface color, shape integrity, presence or absence of defects, etc.

[0057] 3. At the same time, the bifurcated optical fiber accurately captures the reflected and transmitted light source information of the vegetables, which is transmitted in real time to the near-infrared spectrometer. The spectrometer quickly converts the received spectral information into clear spectral images,

[0058] Then the spectral images are sent to the model established in the computer. According to the characteristic parameters of the spectral images,

[0059] The internal quality of the vegetables is accurately predicted.

[0060] 4. After completing the internal and external quality detection, the computer system automatically organizes and classifies all the data obtained. These data are analyzed in depth to calculate the error range between the detection results and the actual quality, and then the accuracy of the entire detection process is verified to ensure that the detection results are reliable and effective.

[0061] The experimental results are as follows:

[0062] Peppers Cucumbers Eggplants External defects (pieces) 19 18 18 Internal defects (pieces) 18 19 18

[0063] Experimental conclusion:

[0064] 1) The three typical long strip-shaped fruits and vegetables, i.e. cucumber, eggplant and bean, can successfully complete the synchronous detection process of internal and external quality on the fruit cup designed for them. During the whole detection process, the fruits and vegetables do not appear to fall, damage and other adverse phenomena, which fully shows that the feasibility of the fruit cup in meeting the detection needs of long strip-shaped fruits and vegetables is in line with expectations.

[0065] 2) According to the detailed data records in the table, it can be known through comprehensive analysis that in the internal and external comprehensive defect detection work carried out for peppers, cucumbers and eggplants, the external defect detection performs excellently, among which the detection accuracy of peppers is as high as 95%, and the detection accuracy of cucumbers and eggplants also reaches 90%; while in the internal defect detection, the detection accuracy of cucumbers leads with 95%, and the detection accuracy of peppers and eggplants is also 90%. The overall detection accuracy is high, and all data meet the established detection demand standard.

[0066]

[0067] Although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for clarity. The skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that can be understood by the skilled in the art.

[0068] Therefore, the above only describes the preferred embodiments of the present application, and is not intended to limit the scope of the present application; that is, all equivalent transformations made within the scope of the claims of the present application are within the protection scope of the claims of the present application.​

Claims

1. A fruit cup for simultaneous internal and external quality testing of long strips of fruits and vegetables, characterized by: The invention comprises an external frame (14) for carrying the long strip fruits and vegetables to be tested and a turning mechanism (15) for driving the long strip fruits and vegetables to be tested to turn over. The external frame (14) comprises swing plates (9) arranged at intervals on both sides. A middle connecting plate (10) is further arranged between the swing plates (9), and the swing plates (9) and the middle connecting plate (10) are arranged at intervals. The turning mechanism (15) comprises a rotating shaft (13). A turning wheel (8) arranged at intervals is mounted on the rotating shaft (13). The turning wheel (8) is located in the interval between the swing plates (9) and the middle connecting plate (10).

2. The fruit cup for synchronously detecting the internal and external quality of long strip fruits and vegetables according to claim 1, characterized in that: The swing plate (9) and the connecting plate (10) have the same structural appearance, and arc-shaped grooves (900) are respectively provided in their respective parts. The two sides of the arc-shaped grooves (900) extend outward through arc-shaped surfaces (901) to transition to wedge surfaces (902) at the ends. The swing plate (9) and the connecting plate (10) are fixedly arranged by end plates (12) at both ends.

3. The fruit cup for synchronously detecting the internal and external quality of long strip fruits and vegetables according to claim 1, characterized in that: The rotating shaft (13) is provided with a turning wheel group with the same spacing as the swing plate (9) and the middle connecting plate (10), and each group has two turning wheels (8). The two ends of the rotating shaft (13) are respectively installed with rotating wheels (11) for driving the rotating shaft (13) to rotate.

4. The fruit cup for synchronously detecting the internal and external quality of long strip fruits and vegetables according to claim 1, characterized in that: The flip wheel (8) is gear-shaped and is made of rubber.

5. The fruit cup for synchronously detecting the internal and external quality of long strip fruits and vegetables according to claim 1, characterized in that: A light-through mechanism (17) is installed between the swing plate (9) and the middle connecting plate (10), which is staggered with the flip wheel (8). The light-through mechanism (17) includes a hollow support column (20). A fixing block (21) is provided at the bottom end of the support column (20). A light-through hole is provided between the fixing block (21) and the support column (20). A light-shielding rubber sleeve (16) is installed at the top end of the support column (20) through a light-shielding sleeve.

6. The fruit cup for synchronously detecting the internal and external quality of long strip fruits and vegetables according to claim 5, characterized in that: The middle portion of the support column (20) is fixedly mounted via a light-transmitting bracket (18); a hollow sleeve (181) for fitting and fixing the support column (20) is provided in the middle portion of the light-transmitting bracket (18); mounting plates (182) are provided on both sides of the hollow sleeve (181); and mounting holes (183) for mounting the rotating shaft (13) are respectively provided on the mounting plates (182).

7. A detection system based on the fruit cup structure according to claim 5, comprising a detection stand (5), wherein circulating conveying chains (4) are installed on both sides of the detection stand (5), and a plurality of groups of long fruit and vegetable cups (3) to be detected are installed between the circulating conveying chains (4), which are arranged in rows and circulated for carrying. The fruit cups in the same row of the fruit cup group (3) are connected and fixed by the same rotating shaft (13), and the two ends of the rotating shaft (13) are respectively connected to the chain bracket (23) on the chain through the shaft bracket (22). A support plate (19) for the rotating wheel (11) to roll is provided on the inner side of the chain. A detection station is provided in the middle of the detection stand (5), an image information acquisition device is provided above the detection station, and a spectral information acquisition device is provided below the detection station, which is arranged in coordination with the position of the light hole.

8. The detection system according to claim 7, characterized in that: The image information acquisition device comprises a high-speed camera (1) and a halogen lamp (2) mounted on a detection station via a bracket. When the circulating conveyor chain (4) drives the fruit cup group through the detection station, the high-speed camera (1) collects external image information of fruits and vegetables under the illumination of the halogen lamp (2). Finally, the high-speed camera transmits the collected external image information to a computer (7).

9. The detection system according to claim 7, characterized in that: The spectral information adopting device comprises an optical fiber mechanism (29), a bifurcated optical fiber (24) and a spectrometer (6). The optical fiber probe (28) of the optical fiber mechanism receives light information from the light hole and transmits it to the spectrometer (6) through the bifurcated optical fiber (24).

10. The detection system according to claim 9, characterized in that: The optical fiber mechanism (29) includes an optical fiber probe (28) with adjustable height. The optical fiber probe (28) is respectively nested on the top of the optical fiber plate (27). The optical fiber plate (27) is nested in the optical fiber plate sleeve (25) and its height can be adjusted by a knob (26).

Images