Fish screening device and screening method

Abstract

The invention discloses a fish screening device and a screening method, and belongs to the technical field of fish screening. The storage unit is mounted on the base; the screening unit is mounted on the base and corresponds to the outlet of the storage unit; the visual identification unit is electrically connected with the screening unit so as to screen the fishes with different sizes; the collecting unit is mounted on the base and corresponds to the screening unit so as to collect the screened fishes with different sizes in a one-to-one correspondence manner; and the control unit is electrically connected with the screening unit and the visual identification unit. The automatic fish screening device realizes automatic fish screening, can realize high-precision sorting, and improves the screening efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fish screening, in particular to a fish screening device and method. BACKGROUND

[0002] In fish farming, efficient screening and accurate grading of fry are crucial for improving farming efficiency and fish population quality.

[0003] Traditional manual screening methods have low efficiency, high labor intensity, poor operation consistency, and other problems, which can easily lead to fish body damage and reduced survival rate. Even though existing mechanical screening devices can partially replace manual work, they still have significant defects: First, they lack dynamic adjustment capability and cannot adjust screening parameters in real time according to the actual size of the fry, resulting in poor adaptability to batches with large size differences. Second, they have insufficient visual recognition accuracy and cannot achieve high-precision grading, often requiring manual re-inspection.

[0004] Therefore, there is an urgent need for a fry screening solution that integrates intelligent identification, dynamic adjustment, and automatic control to improve screening accuracy, efficiency, and fish population health. SUMMARY

[0005] To achieve the above purpose, the present application provides the following technical solutions: A fish screening device, comprising: a base; a storage unit mounted on the base; a screening unit mounted on the base and corresponding to the outlet of the storage unit; a visual recognition unit electrically connected to the screening unit to screen fish of different sizes; a collection unit mounted on the base and corresponding to the screening unit to one-to-one collect fish of different sizes after screening; a control unit electrically connected to the screening unit and the visual recognition unit.

[0006] Further, the storage unit comprises a storage box, a buffer box, a conveying plate, a rotating plate and a driving motor; the storage box is installed on the base, the rotating plate is rotatably installed in the storage box; a first opening is arranged on the storage box, and an electrically operated switch door is arranged at the first opening; the buffer box is connected with the storage box and is arranged correspondingly to the first opening; the driving motor is installed on the outer wall of the storage box, the driving end penetrates through the storage box and is connected with the rotating plate, the rotating plate is driven to rotate, fish on the rotating plate is discharged from the first opening to the buffer box; a plurality of second openings are arranged on the end of the buffer box away from the storage box; the first end of the conveying plate is connected with the buffer box, a plurality of water tanks are arranged on the conveying plate, and the plurality of water tanks are arranged correspondingly to the plurality of second openings; the second end of the conveying plate is arranged correspondingly to the screening unit to screen the fish discharged from the water tanks.

[0007] Further, the screening unit comprises a screening support, a telescopic motor and a plurality of screening plates; the screening support is installed on the end of the base away from the storage box and is arranged correspondingly to the second end of the conveying plate; a plurality of screening plates are arranged in an array on the screening support and are arranged correspondingly to the second end of the conveying plate; the first end of the screening plate is rotatably connected with the screening support; the fixed end of the telescopic motor is connected with the screening support, the driving end is connected with the second end of the screening plate, and the second end of the screening plate is driven to rotate around the first end of the screening plate to push the fish not meeting the requirements discharged from the water tanks into the collecting unit.

[0008] Further, the collecting unit comprises a first collecting box and a second collecting box; the first collecting box is installed on the base and is arranged between the screening support and the conveying plate to collect the fish meeting the requirements; the second collecting box is installed on the base and is arranged correspondingly to the conveying plate to collect the fish not meeting the requirements pushed by the screening plates.

[0009] Further, the visual recognition unit comprises a plurality of binocular cameras and an image acquisition module; the plurality of binocular cameras are arranged on the end close to the driving motor and are connected with the screening support; the image acquisition module is electrically connected with the plurality of binocular cameras and the control unit respectively.

[0010] Further, the control unit comprises an image processing module, a data processing module, an adaptive adjustment module and a motion control module; The image processing module is electrically connected with the image acquisition module and the binocular cameras, and is used for analyzing the size of the fish in real time; the data processing module is electrically connected with the image processing module, the adaptive adjustment module and the motion control module respectively; The adaptive adjustment module is used for receiving an output signal of the image processing module, dynamically calculating an optimal inclination angle of the screening plate, and generating an angle adjustment instruction; and the motion control module is used for converting the instruction of the adaptive adjustment module into a motor control signal for driving the telescopic motor to act.

[0011] Further, a fish screening method for the fish screening device of any one of the above, the screening method comprising the following steps: S1, fish conveying stage The control unit controls the driving motor of the storage unit to work, and drives the rotating plate to rotate in the storage box, so that the fish is discharged from the first opening of the storage box to the buffer box; The fish in the buffer box enters the plurality of water grooves of the conveying plate through the plurality of second openings, and the conveying plate slowly conveys the fish to the screening plate; S2, visual recognition stage When the fish moves to the screening plate along the conveying plate, the plurality of binocular cameras of the visual recognition unit capture the image of the fish in real time, and the image data is transmitted to the control unit through the image acquisition module; The image processing module in the control unit analyzes the image data in real time, calculates the size of each fish, and compares it with the preset size standard, and the data processing module receives the output of the image processing module to determine whether the fish meets the requirements: if the size of the fish is within the preset range, it is marked as meeting the requirements; otherwise, it is marked as not meeting the requirements; S3, screening and collecting stage The control unit dynamically calculates the optimal inclination angle of the screening plate through the adaptive adjustment module according to the visual recognition result, generates an angle adjustment instruction; and the motion control module converts the angle adjustment instruction into a motor control signal to drive the telescopic motor to act: For the fish that does not meet the requirements, the telescopic motor drives the second end of the corresponding screening plate to rotate around the first end, so that the screening plate forms an inclined surface and pushes the fish from the conveying plate to the second collecting box; For the fish that meets the requirements, the screening plate remains stationary, and the fish automatically falls into the first collecting box from the water groove of the conveying plate; The device continues to run until all the fish are screened.

[0012] Compared with the prior art, the beneficial effects of the present application are: (1) Realize automatic and accurate grading: through the cooperation of the visual recognition unit and the control unit, different size fish are automatically screened, manual intervention is avoided, and the operation efficiency is greatly improved.

[0013] (2) Improve screening accuracy and dynamic adaptability: use binocular camera and image processing module to analyze fish size in real time, combine with adaptive adjustment module to dynamically calculate the best angle of screening plate, ensure high-precision sorting, and can flexibly cope with size differences of different batches of fish.

[0014] (3) Reduce fish body injury: use water tank conveying mechanism and controllable pushing method to minimize fish stress and significantly reduce the risk of mechanical damage, improve survival rate.

[0015] (4) Optimize overall performance: The device integrates storage, transportation, identification and collection units, realizes process integration, strengthens operation reliability and practicality, and effectively solves the core problems of low efficiency and insufficient precision of traditional technology. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 The overall structure of the fish screening device of the application Figure One ; Figure 2 The overall structure of the fish screening device of the application Figure Two ; In the figure: 1, screening support; 2, binocular camera; 3, conveying plate; 4, water tank; 5, buffer box; 6, storage box; 7, base; 8, telescopic motor; 9, first collection box; 10, screening plate; 11, second collection box; 12, rotating plate; 13, second opening; 14, driving motor. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some embodiments of the application, not all embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0019] Embodiment 1

[0020] As shown in Figures 1-2 , a fish screening device comprises: a base 7; a storage unit, the storage unit is installed on the base 7; The screening unit is installed on the base 7 and arranged correspondingly to the outlet of the storage unit; The visual recognition unit is electrically connected with the screening unit to screen fish of different sizes. The collecting unit is installed on the base 7 and arranged correspondingly to the screening unit to collect fish of different sizes screened one by one. The control unit is electrically connected with the screening unit and the visual recognition unit respectively.

[0021] In the embodiment, the storage unit comprises a storage box 6, a buffer box 5, a conveying plate 3, a rotating plate 12 and a driving motor 14; the storage box 6 is installed on the base 7, and the rotating plate 12 is rotatably installed in the storage box 6; the storage box 6 is provided with a first opening, and the first opening is provided with an electrically operated switch door; the buffer box 5 is connected with the storage box 6 and arranged correspondingly to the first opening; the driving motor 14 is installed on the outer wall of the storage box 6, and the driving end penetrates through the storage box 6 and is connected with the rotating plate 12 to drive the rotating plate 12 to rotate, so that the fish on the rotating plate 12 is discharged from the first opening to the buffer box 5; the buffer box 5 is provided with a plurality of second openings 13 at the end away from the storage box 6; the first end of the conveying plate 3 is connected with the buffer box 5, and the conveying plate 3 is provided with a plurality of water tanks 4, and the plurality of water tanks 4 are arranged correspondingly to the plurality of second openings 13 one by one; the second end of the conveying plate 3 is arranged correspondingly to the screening unit to screen the fish discharged in the water tanks 4.

[0022] In another embodiment, the storage box 6 is provided with a plurality of storage boxes from bottom to top, and the conveying plate 3 is provided with a plurality of conveying plates; the plurality of conveying plates 3 are installed on the storage box 6 from top to bottom and arranged correspondingly to the second openings 13 of the buffer box 5 to convey fish through the water tanks 4.

[0023] In the embodiment, the screening unit comprises a screening support 1, a telescopic motor 8 and a plurality of screening plates 10; the screening support 1 is installed on the base 7 at the end away from the storage box 6 and arranged correspondingly to the second end of the conveying plate 3; the plurality of screening plates 10 are arrayed on the screening support 1 and arranged correspondingly to the second end of the conveying plate 3; the first end of the screening plate 10 is rotatably connected with the screening support 1; the fixed end of the telescopic motor 8 is connected with the screening support 1, and the driving end is connected with the second end of the screening plate 10 to drive the second end of the screening plate 10 to rotate around the first end of the screening plate 10, so as to push the fish not meeting the requirements discharged in the water tanks 4 to the collecting unit.

[0024] In the embodiment, the collecting unit comprises a first collecting box 9 and a second collecting box 11; the first collecting box 9 is installed on the base 7 and arranged between the screening support 1 and the conveying plate 3 to collect fish meeting the requirements; the second collecting box 11 is installed on the base 7 and arranged correspondingly to the conveying plate 3 to collect fish not meeting the requirements pushed by the screening plate 10.

[0025] In the embodiment, the visual recognition unit comprises a plurality of binocular cameras 2 and an image acquisition module; the plurality of binocular cameras 2 are arranged at one end close to the driving motor 14 and connected with the screening support 1; the image acquisition module is electrically connected with the plurality of binocular cameras 2 and the control unit respectively.

[0026] In the embodiment, the control unit comprises an image processing module, a data processing module, an adaptive adjustment module and a motion control module. The image processing module is electrically connected with the image acquisition module and the binocular cameras 2, and is used for real-time analysis of the size of the fish; the data processing module is electrically connected with the image processing module, the adaptive adjustment module and the motion control module respectively. The adaptive adjustment module is used for receiving the output signal of the image processing module, dynamically calculating the optimal inclination angle of the screening plate 10, and generating an angle adjustment instruction; the motion control module is used for converting the instruction of the adaptive adjustment module into a motor control signal for driving the telescopic motor 8 to act.

[0027] Embodiment 2

[0028] A fish screening method, which is the screening method of the fish screening device in Embodiment 1, comprises the following steps: S1, fish conveying stage The device is started, the control unit controls the driving motor 14 of the storage unit to work, and the rotating plate 12 is driven to rotate in the storage box 6, so that the fish is discharged from the first opening of the storage box 6 to the buffer box 5. The fish in the buffer box 5 enters the plurality of water grooves 4 of the conveying plate 3 through the plurality of second openings 13, and the conveying plate 3 slowly conveys the fish to the screening plate 10. S2, visual recognition stage When the fish moves to the screening plate 10 along the conveying plate 3, the plurality of binocular cameras 2 of the visual recognition unit capture the image of the fish in real time, and the image data is transmitted to the control unit through the image acquisition module. The image processing module in the control unit analyzes the image data in real time, calculates the size of each fish, and compares it with the preset size standard; the data processing module receives the output of the image processing module to determine whether the fish meets the requirements: if the size of the fish is within the preset range, it is marked as meeting the requirements; otherwise, it is marked as not meeting the requirements. S3, screening and collecting stage The control unit dynamically calculates the optimal inclination angle of the screening plate 10 according to the visual recognition result through the adaptive adjustment module, generates an angle adjustment instruction; the motion control module converts the angle adjustment instruction into a motor control signal to drive the telescopic motor 8 to act. For the fish not meeting the requirements, the telescopic motor 8 drives the second end of the corresponding sieve plate 10 to rotate around the first end, so that the sieve plate 10 forms an inclined surface and pushes the fish from the conveying plate 3 to the second collecting box 11; For the fish meeting the requirements, the sieve plate 10 remains stationary, and the fish automatically falls from the water tank 4 of the conveying plate 3 into the first collecting box 9; The device continues to operate until all the fish are screened.

[0029] Obviously, various modifications and changes can be made to the application by those skilled in the art without departing from the spirit and scope of the application. Thus, it is intended that the application encompass such modifications and changes as fall within the scope of the appended claims and their equivalents.

Claims

1. A fish screening device, characterized in that, include: Base; A storage unit, which is mounted on the base; A screening unit is mounted on the base and is configured to correspond to the outlet of the storage unit; A visual recognition unit, which is electrically connected to the screening unit, is used to screen fish of different sizes. A collection unit is installed on the base and is set in correspondence with the screening unit to collect fish of different sizes after screening. The control unit is electrically connected to both the screening unit and the visual recognition unit.

2. The fish screening device as described in claim 1, characterized in that, The storage unit includes a storage box, a buffer box, a conveyor plate, a rotating plate, and a drive motor. The storage box is mounted on the base, and the rotating plate is rotatably mounted inside the storage box. The storage box has a first opening with an electrically operated door. The buffer box is connected to the storage box and corresponds to the first opening. The drive motor is mounted on the outer wall of the storage box, and its drive end passes through the storage box and connects to the rotating plate, driving the rotating plate to rotate so that fish on the rotating plate are discharged from the first opening into the buffer box. The buffer box has multiple second openings at one end away from the storage box. The first end of the conveyor plate is connected to the buffer box, and the conveyor plate has multiple water tanks, each corresponding to one of the multiple second openings. The second end of the conveyor plate corresponds to the screening unit to screen the fish discharged from the water tanks.

3. The fish screening device as described in claim 2, characterized in that, The screening unit includes a screening bracket, a telescopic motor, and multiple screening plates. The screening bracket is installed on the base at one end away from the storage box and is correspondingly positioned to the second end of the conveyor plate. An array of multiple screening plates is arranged on the screening bracket and is correspondingly positioned to the second end of the conveyor plate. The first end of each screening plate is rotatably connected to the screening bracket. The fixed end of the telescopic motor is connected to the screening bracket, and the driving end is connected to the second end of each screening plate, driving the second end of each screening plate to rotate around the first end of the screening plate, thereby pushing the non-compliant fish discharged from the tank into the collection unit.

4. The fish screening device as described in claim 3, characterized in that, The collection unit includes a first collection box and a second collection box; the first collection box is installed on the base and disposed between the screening bracket and the conveyor plate to collect fish that meet the requirements; the second collection box is installed on the base and disposed correspondingly to the conveyor plate to collect fish that do not meet the requirements pushed out by the screening plate.

5. A fish screening device as described in claim 4, characterized in that, The visual recognition unit includes multiple binocular cameras and an image acquisition module; the multiple binocular cameras are located at one end near the drive motor and connected to the screening bracket; the image acquisition module is electrically connected to the multiple binocular cameras and the control unit respectively.

6. The fish screening device as described in claim 5, characterized in that, The control unit includes an image processing module, a data processing module, an adaptive adjustment module, and a motion control module; The image processing module is electrically connected to the image acquisition module and the binocular camera, and is used to analyze the size of the fish in real time; the data processing module is electrically connected to the image processing module, the adaptive adjustment module and the motion control module respectively; The adaptive adjustment module receives the output signal from the image processing module, dynamically calculates the optimal tilt angle of the screening plate, and generates an angle adjustment command; the motion control module converts the command from the adaptive adjustment module into a motor control signal to drive the telescopic motor.

7. A method for screening fish, characterized in that, The screening method of the fish screening device according to any one of claims 1 to 6, the screening method comprising the following steps: S1, Fish Transport Stage The starting device and control unit control the drive motor of the storage unit to work, drive the rotating plate to rotate inside the storage box, so that the fish are discharged from the first opening of the storage box into the buffer box. The fish in the buffer tank enter multiple tanks of the conveyor plate through multiple second openings, and the conveyor plate slowly transports the fish to the screening plate; S2, Visual Recognition Stage When the fish moves to the screening plate along the conveyor plate, multiple binocular cameras of the vision recognition unit capture images of the fish in real time and transmit the image data to the control unit through the image acquisition module; The image processing module in the control unit analyzes the image data in real time, calculates the size of each fish, and compares it with the preset size standard. The data processing module receives the output of the image processing module and determines whether the fish meets the requirements: if the fish size is within the preset range, it is marked as meeting the requirements; otherwise, it is marked as not meeting the requirements. S3, Screening and Collection Phase Based on the visual recognition results, the control unit dynamically calculates the optimal tilt angle of the screening plate through the adaptive adjustment module and generates an angle adjustment command; the motion control module converts the angle adjustment command into a motor control signal to drive the telescopic motor. For fish that do not meet the requirements, the telescopic motor drives the second end of the corresponding screening plate to rotate around the first end, so that the screening plate forms an inclined surface, pushing the fish from the conveyor plate to the second collection box. For fish that meet the requirements, the screening plate remains stationary, and the fish automatically fall from the trough of the conveyor plate into the first collection box; The device continues to run until all fish have been sorted.

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