Intelligent eel grading device based on roller grating and working method of intelligent eel grading device

Abstract

According to the intelligent eel grading device based on the roller grating and the working method of the intelligent eel grading device, an intelligent eel shifting component is controlled through coordination of a depth camera and an eel shifting claw, so that the problem that eels are easily stacked and wound during grading is solved; the grading component can realize up-down high-frequency shaking and automatic grading gap control under the condition of constant grading spacing, the speed of eels entering the grading bin is more uniform through the rectification piece, dead eels are effectively prevented from entering the grading bin, and the eels are counted by the camera on the eel outlet side after grading of the eels is completed. In conclusion, by the adoption of the scheme, the eel grading efficiency is remarkably improved, automation, informatization and intelligentization of eel grading operation are achieved, and the eel grading system has high popularization value in the eel breeding grading aspect.

Description

Technical Field

[0001] The invention relates to the technical field of aquaculture, and in particular to an intelligent eel grading device and a working method thereof. Background Art

[0002] With the continuous expansion of domestic eel farming, the demand for efficient grading technology for large-scale and intensive production is becoming increasingly urgent. Eels need to be graded according to specifications during their growth process to avoid cannibalism, optimize feed feeding and improve farming efficiency. However, traditional grading methods rely on manual operation, and workers need to manually sort on wooden grating plates, which is labor-intensive and slow to grade, making it difficult to meet the needs of large-scale farming. Manual sorting relies on experience, and is prone to misjudgment of specifications due to fatigue, and labor costs account for more than 30% of the total farming cost. Manual operation can easily cause abrasions or stress reactions on the eel's body surface, affecting subsequent growth and commodity value. Existing mechanical grading equipment mostly uses fixed-gap rollers, which cannot adapt to the dynamic adjustment of eels of different specifications, and lacks intelligent control, resulting in low grading accuracy (error rate ≥ 15%), eel accumulation and entanglement, and other problems. Although some automated equipment has introduced vibrating screen or conveyor belt technology, the gap between fixed rollers is difficult to match the growth differences of eels, and frequent manual adjustments are required. There is a lack of real-time monitoring and feedback mechanism, and it is impossible to dynamically optimize the grading parameters. Traditional equipment is difficult to separate dead eels, which affects the health of the fish after grading. Therefore, it is urgent to develop an intelligent grading device that integrates machine vision, adaptive control and efficient sorting to break through the technical bottleneck of large-scale farming. Summary of the invention

[0003] The purpose of the present invention is to provide an intelligent eel grading device based on a roller grid and a working method thereof, aiming to realize automation, informatization and high precision of eel grading.

[0004] The object of the present invention is achieved by: an intelligent eel grading device based on a roller grid, comprising:

[0005] The inclined grading bin (4) has a fish inlet side which is an inclined surface, an inner wall bottom which is an inclined surface, and a fish outlet side which is the lowest position of the inner wall bottom;

[0006] A plurality of rectifiers (15) are evenly spaced along the width direction of the grading chamber (4), the rectifiers (15) are used to uniformly control the flow of incoming eels and block dead eels that have died and stiffened, and are fixedly connected to the fish inlet side slope of the grading chamber (4), and the gap between any two adjacent rectifiers (15) allows the eels (16) to move through;

[0007] A grading component (11) comprises two groups of grading rollers (11-1) which are staggered in the vertical direction, the grading rollers (11-1) extending along the width direction of the grading bin (4), and the two groups of grading rollers (11-1) are installed in the inner cavity of the grading bin (4) in an adjustable manner in the vertical direction, so that the gap between the two groups of grading rollers (11-1) is adapted to the head width of the eels (16) to be graded.

[0008] Furthermore, it also includes an intelligent eel-pulling component (7), and the intelligent eel-pulling component (7) includes:

[0009] A translation housing, which is movably mounted on the upper side of the grading bin (4) in a forward and backward manner;

[0010] A pair of eel-pulling motors (7-3) are fixedly installed in a translation housing, with the output end of the eel-pulling motor (7-3) facing downward and equipped with an eel-pulling claw (7-5), the eel-pulling claw (7-5) being formed by a vertical rod portion, an inclined rod portion and a claw portion being connected in one piece, the vertical rod portion of the eel-pulling claw (7-5) being connected to the output end of the eel-pulling motor (7-3), the inclined rod portion being inclined downward based on the vertical rod portion, and the claw portion being connected to the lowest end of the inclined rod portion, so as to be used for separating the accumulated and entangled eel groups.

[0011] Furthermore, the intelligent eel-pulling component (7) also includes a depth camera (7-6) for monitoring the aggregation state of eels, and the depth camera (7-6) is connected to the lower side of the translation housing.

[0012] Furthermore, the intelligent eel-pulling component (7) also includes an angle control motor (7-2), the angle control motor (7-2) is installed in the translation housing, and the depth camera (7-6) is connected to the output end of the angle control motor (7-2) and rotates horizontally under the control of the angle control motor (7-2).

[0013] Furthermore, the intelligent eel-pulling component (7) is provided with a moving component (6), the moving component (6) is installed on the upper side of the grading bin (4), and the moving component (6) is transmission-connected with the translation housing of the intelligent eel-pulling component (7) to drive the entire intelligent eel-pulling component (7) to translate forward and backward.

[0014] Furthermore, a funnel (5) is fixedly connected to the fish inlet side of the grading bin (4), and has a wider upper port and a narrower lower port. The lower port of the funnel (5) faces all the fairings (15), and the fairings (15) extend in an S shape as a whole.

[0015] Furthermore, a baffle (8) is installed on the fish outlet side of the grading bin (4), and the baffle (8) is used to block the upper space of the distribution area of ​​the grading roller (11-1) to block the ungraded eels (16), and the lower space of the distribution area of ​​the grading roller (11-1) accommodates the graded eels (16), and the part of the fish outlet side of the grading bin (4) below the baffle (8) is the fish outlet, and the fish outlet is connected to the lower space of the distribution area of ​​the grading roller (11-1);

[0016] The device also comprises a camera support (9) fixedly arranged at a fish outlet side of the grading chamber (4), and a camera (10) for detecting the number of eels leaving the grading chamber (4) is mounted on the camera support (9).

[0017] Furthermore, the classification component (11) comprises:

[0018] An upper grading part (11-2) is movably connected to the side wall of the grading bin (4) in an upper and lower manner, and a group of grading rollers (11-1) located at an upper position are connected to the upper grading part (11-2);

[0019] An upper telescopic motor (11-5) is fixedly connected to the side wall of the grading bin (4), and an output end thereof is connected to the upper grading portion (11-2);

[0020] The lower grading part (11-3) is movably connected to the side wall of the grading bin (4) and is located directly below the upper grading part (11-2). Another group of grading rollers (11-1) located below is connected to the lower grading part (11-3);

[0021] The lower telescopic motor (11-6) is fixedly connected to the side wall of the grading bin (4), and its output end is connected to the lower grading part (11-3).

[0022] Furthermore, it also includes:

[0023] A movable aluminum profile platform (1), wherein an angle control support (12) is fixedly connected to a position at the bottom of the grading bin (4) corresponding to the fish outlet side, and the angle control support (12) is connected to the aluminum profile platform (1) in an upward and downward rotation manner via an angle control support shaft (13);

[0024] A hydraulic base (2) is provided with a foot-operated hydraulic tilt angle controller (3) and is installed in an aluminum profile platform (1). The hydraulic base (2) movably supports the position of the bottom of the grading bin (4) corresponding to the fish inlet side, drives the grading bin (4) to adjust its tilt angle with the angle control support shaft (13) as the rotation adjustment fulcrum, and makes the fish outlet side of the grading bin (4) at the lowest position.

[0025] As another aspect of the present invention, a working method based on the intelligent eel grading device is proposed, which at least comprises the following steps:

[0026] pouring eels (16) to be graded into the grading chamber (4) from the fish inlet side of the grading chamber (4);

[0027] The rectifying piece (15) is used to uniformly control the flow of incoming eels and block dead eels that have died and stiffened;

[0028] The two groups of grading rollers (11-1) are adjusted up and down so that the roller spacing is matched with the head width of the eel (16), so that the eel (16) that meets the grading requirements passes through the gap of the grading component (11), swims into the lower space of the grading component (11), and leaves through the fish outlet side of the grading bin (4).

[0029] The beneficial effects of the present invention are:

[0030] The intelligent eel-pulling component of the present invention solves the problem of easy accumulation and entanglement of eels during grading through the coordinated control of the depth camera and the eel-pulling claw. The grading component can realize high-frequency shaking up and down and automatic grading gap control under the condition of constant grading spacing. The rectifier makes the rate of eels entering the grading bin more uniform and effectively prevents dead eels from entering. After the eels are graded, the camera on the fish outlet side completes the counting of eels. In summary, the scheme of the present invention significantly improves the grading efficiency of eels, realizes the automation, informatization and intelligence of eel grading operations, and has great promotion value in eel breeding and grading. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a perspective view of the present invention.

[0032] Figure 2 This is a schematic diagram of the smart eel-poker components.

[0033] Figure 3 is a schematic diagram of the hierarchical components.

[0034] Figure 4 It is a schematic diagram showing the principle of pouring out the eels that have been graded in the grading bin.

[0035] Explanation of the reference numerals: aluminum profile platform 1, hydraulic base 2, hydraulic tilt controller 3, grading bin 4, funnel 5, moving part 6, intelligent eel-plucking part 7, module waterproof cover 7-1, angle control motor 7-2, eel-plucking motor 7-3, eel-plucking part base 7-4, eel-plucking claw 7-5, depth camera 7-6, baffle 8, camera bracket 9, camera 10, grading part 11, grading roller 11-1, upper grading part 11-2, lower grading part 11-3, motor base 11-4, upper telescopic motor 11-5, lower telescopic motor 11-6, grading part waterproof cover 11-7, angle control support 12, angle control support shaft 13, touch screen 14, rectifier 15, eel 16. DETAILED DESCRIPTION

[0036] The following will be combined with the attached embodiment of the present invention Figure 1-4 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] like Figure 1 As shown, an intelligent eel grading device based on a roller grid comprises:

[0038] The inclined grading bin 4 has a fish inlet side which is an inclined surface, an inner wall bottom which is an inclined surface, and a fish outlet side which is the lowest position of the inner wall bottom. For ease of description, the movement direction of the fish body is assumed to be the front-rear direction;

[0039] A plurality of rectifiers 15 are evenly spaced along the width direction of the grading chamber 4. The rectifiers 15 are used to uniformly control the flow of eels entering the grading chamber 4 and block dead eels that have died and become stiff. The rectifiers 15 are fixedly connected to the fish inlet side slope of the grading chamber 4. The gap between any two adjacent rectifiers 15 allows eels 16 to move through.

[0040] The grading component 11 has two groups (rows) of grading rollers 11-1 staggered up and down, the staggered spacing of the two rows of grading rollers 11-1 is the eel grading spacing, and the grading rollers 11-1 of each group are evenly spaced in the front-to-back direction. The grading rollers 11-1 extend along the width direction of the grading bin 4, perpendicular to the overall direction of movement of the fish body. The two groups of grading rollers 11-1 are adjustable up and down in the inner cavity of the grading bin 4, so that the gap between the two groups of grading rollers 11-1 is adapted to the head width of the eel 16 to be graded;

[0041] A movable aluminum profile platform 1 is provided with rollers at the bottom of the aluminum profile platform 1 for transfer, which can support the entire grading device and realize that the entire grading device can be pushed manually. An angle control support 12 is fixedly connected to the position corresponding to the fish outlet side at the bottom of the grading bin 4, and the angle control support 12 is connected to the aluminum profile platform 1 by an angle control support shaft 13 for vertical rotation;

[0042] The hydraulic base 2 is equipped with a foot-operated hydraulic tilt controller 3, which is installed in the aluminum profile platform 1. The hydraulic base 2 movably supports the position of the bottom of the grading bin 4 corresponding to the fish inlet side. The operator can use the hydraulic tilt controller 3 to control the hydraulic base 2, drive the grading bin 4 to adjust its tilt angle with the angle control support shaft 13 as the rotation adjustment fulcrum, and make the fish outlet side of the grading bin 4 the lowest position, so that the grading eels 16 can be poured out from the fish outlet more conveniently;

[0043] The control system is equipped with a touch screen 14, which is installed on the side wall of the grading bin 4 to facilitate the operator to operate. The parameter setting of the touch screen 14 supports the customization of grading specifications, shaking frequency / amplitude and other parameters to adapt to different farms.

[0044] Among them, the classification component 11 includes:

[0045] An upper grading part 11-2 is movably connected to the side wall of the grading bin 4, and a group of grading rollers 11-1 at the upper position are connected to the upper grading part 11-2;

[0046] The upper telescopic motor 11-5 is fixedly connected to the side wall of the grading bin 4, and its output end is connected to the upper grading part 11-2;

[0047] The lower grading part 11-3 is movably connected to the side wall of the grading bin 4 and is located directly below the upper grading part 11-2. Another set of grading rollers 11-1 located below is connected to the lower grading part 11-3.

[0048] The lower telescopic motor 11-6 is fixedly connected to the side wall of the grading bin 4, and its output end is connected to the lower grading part 11-3;

[0049] A motor base 11-4 fixedly connected to the side wall of the grading bin 4 serves as a base for the up and down telescopic motor;

[0050] The grading part waterproof cover 11-7 is fixedly connected to the side wall of the grading bin 4 and covers the upper telescopic motor 11-5, the upper grading part 11-2, the lower telescopic motor 11-6 and the lower grading part 11-3.

[0051] In addition, a funnel 5 is fixedly connected to the fish inlet side of the grading bin 4. The funnel 5 is used to pour the eels to be graded. The funnel 5 has a wider upper port and a narrower lower port. The lower port of the funnel 5 faces all the rectifying pieces 15. The rectifying pieces 15 extend in an S shape as a whole, which is conducive to uniformly controlling the flow rate of incoming eels and blocking dead eels that have died and become stiff.

[0052] The fish outlet side of the grading bin 4 is provided with a baffle 8, which is used to block the upper space of the distribution area of ​​the grading roller 11-1 to block the ungraded eels 16, and lean against the grading roller 11-1 at the fish outlet side. The lower space of the distribution area of ​​the grading roller 11-1 accommodates the graded eels 16. The part of the fish outlet side of the grading bin 4 under the baffle 8 is the fish outlet, and the fish outlet is connected to the lower space of the distribution area of ​​the grading roller 11-1.

[0053] The device also includes a camera bracket 9 fixedly arranged at the fish outlet side of the grading bin 4, and a camera 10 for detecting the number of eels leaving the grading bin 4 is installed on the camera bracket 9. The camera 10 is combined with an edge computing module to count the number of eels leaving the grading bin 4 in real time, and display the number of eels passing through and the corresponding eel specification parameters on the touch screen 14, with an error rate of ≤3%. The touch screen 14 sets the eel grading order specifications, shaking frequency, shaking amplitude and the number of fish observed.

[0054] In addition, the device also includes an intelligent eel-pulling component 7, which includes:

[0055] The translation housing is movably mounted on the upper side of the grading bin 4, and is in a strip shape. It is formed by a strip-shaped eel-pulling base 7-4 and a module waterproof cover 7-1 that are fixedly connected. The module waterproof cover 7-1 covers all motors on the eel-pulling base 7-4 to prevent water vapor erosion and extend the life of the equipment.

[0056] Two eel-pulling motors 7-3, the eel-pulling motor 7-3 is fixedly installed in the translation housing, the output end of which faces downward and is equipped with an eel-pulling claw 7-5, the eel-pulling claw 7-5 is formed by a vertical rod part, an oblique rod part and a claw part connected in one body, the vertical rod part of the eel-pulling claw 7-5 is connected to the output end of the eel-pulling motor 7-3, the oblique rod part is inclined downward based on the vertical rod part, and the claw part is connected to the lowermost end of the oblique rod part, so as to separate the accumulated and entangled eel groups, and the surface of the claw part is set to a smooth surface;

[0057] A depth camera 7-6 for monitoring the aggregation state of eels, the depth camera 7-6 being connected to the lower side of the translation housing;

[0058] Angle control motor 7-2, angle control motor 7-2 is installed in the translation housing, depth camera 7-6 is connected to the output end of angle control motor 7-2 and rotates horizontally under the control of angle control motor 7-2, so that the monitoring direction of depth camera 7-6 is controllable, ensuring panoramic monitoring and precise intervention, so as to timely discover the accumulated and entangled eels, start the eel-pulling motor 7-3 to drive the eel-pulling claw 7-5 to pry open and separate the accumulated and entangled eels.

[0059] The smart eel-pulling component 7 is equipped with a moving component 6, which is installed on the upper side of the grading bin 4, and is connected to the translation housing of the smart eel-pulling component 7 by transmission, so as to drive the entire smart eel-pulling component 7 to translate forward and backward. The moving component 6 is not limited to a structural form, and can be set as a synchronous belt mechanism, or other translation drive mechanism.

[0060] Based on the above device, a hierarchical working method is provided, which comprises at least the following steps:

[0061] Pour the eels 16 to be graded into the grading chamber 4 from the fish inlet side of the grading chamber 4;

[0062] The rectifying piece 15 is used to uniformly control the flow of incoming eels and block the dead eels that have died and stiffened;

[0063] like Figure 3 , 4 As shown, the eels 16 are graded using the grading component 11: the two sets of grading rollers 11-1 are adjusted up and down to make the roller spacing match the head width of the eels 16, so that the eels 16 that meet the grading requirements can pass through the gap of the grading component 11, swim into the lower space of the grading component 11, and leave through the fish outlet side of the grading bin 4.

[0064] In the above classification process, if Figure 1 , 2 As shown, the depth camera 7-6 is combined with the target detection algorithm to generate a real-time eel distribution heat map and accurately identify the eel accumulation area. Then, the eel motor 7-3 drives the left and right eel claws 7-5 to separate the entangled eels 16 (the surface of the eel claws 7-5 is smooth, which can reduce the mechanical damage to the eels 16), and the entangled eels are dynamically separated according to the degree of accumulation to reduce the mechanical damage to the eels 16.

[0065] When the smart eel-plucking component 7 moves forward, the depth camera 7-6 is rotated (horizontally rotated) to the front side, and when the smart eel-plucking component 7 moves backward, the depth camera 7-6 is rotated to the back side. The eel-plucking motor 7-3 controls the eel-plucking claw 7-5 to separate the accumulated and entangled eels. When it is recognized that the eels are accumulated on the left, the left eel-plucking claw 7-5 is activated, and vice versa. The eel-plucking base 7-4 is used to connect the moving component 6 and move forward and backward with the moving component 6. The depth camera 7-6 is combined with the eel target monitoring algorithm, and the position of the eel cluster is obtained by analyzing the eel target heat map. According to the severity of the clustering, the eel-plucking claw 7-5 is controlled to rotate in sequence to separate the clustered eels, thereby improving the grading efficiency.

[0066] The roller gap can be automatically adjusted: the upper telescopic motor 11-5 and the lower telescopic motor 11-6 control the spacing between the upper and lower groups of grading rollers 11-1, so that eels of various specifications can be graded (such as 20g, 50g, 100g eels).

[0067] The grading component 11 has a high-frequency shaking working mechanism: while keeping the gap between the upper and lower groups of grading rollers 11-1 constant, the grading rollers 11-1 are driven to vibrate up and down at a high frequency, accelerating the eels 16 to pass through the gap, and the grading efficiency is increased by more than 50%.

[0068] The intelligent eel-pulling component 7 of the present invention solves the problem of easy accumulation and entanglement of eels during grading through the coordinated control of the depth camera 7-6 and the eel-pulling claw 7-5. The grading component 11 can achieve high-frequency shaking up and down and automatic grading gap control under the condition of constant grading spacing. The rectifier 15 makes the rate of eels entering the grading bin 4 more uniform and effectively prevents dead eels from entering. After the eels 16 are graded, the camera 10 on the fish outlet side completes the counting of the eels 16. In summary, the scheme of the present invention significantly improves the grading efficiency of eels, realizes the automation, informatization and intelligence of eel grading operations, and has great promotion value in eel breeding and grading.

[0069] The technical advantages of the present invention are as follows:

[0070] Improved efficiency: The grading speed reaches 2,000 fish per hour, which is 5 times faster than manual operation.

[0071] Accuracy guarantee: specification classification error ≤5%, dead eel interception rate ≥95%;

[0072] The present invention solves the key problems in eel grading through intelligent and modular design, provides an innovative solution for upgrading aquaculture equipment, and has significant economic and ecological benefits.

[0073] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; in the present invention, it should also be noted that the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integrally formed connection, a mechanical connection, or an indirect connection through an intermediate connecting component, and the specific meaning of the terms in this utility model can be understood according to the specific circumstances.

[0074] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

[0075] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An intelligent eel grading device based on a roller grid, characterized in that: include: The inclined grading bin has a sloped fish inlet side, a sloped inner wall bottom, and a fish outlet side at the lowest position of the inner wall bottom; A plurality of rectifiers are evenly spaced along the width of the grading bin, the rectifiers are used to uniformly control the flow of incoming eels and block dead eels that have died and stiffened, and are fixedly connected to the fish inlet side slope of the grading bin, and the gap between any two adjacent rectifiers allows eels to move through; The grading component has two groups of grading rollers which are staggered up and down, and the grading rollers extend along the width direction of the grading bin. The two groups of grading rollers are adjustable up and down in the inner cavity of the grading bin so that the gap between the two groups of grading rollers is adapted to the width of the eel head to be graded.

2. The intelligent eel grading device based on roller grid according to claim 1 is characterized in that: It also includes an intelligent eel-pulling component, which includes: A translation housing is movably mounted on the upper side of the grading bin; A pair of eel-plucking motors are fixedly installed in a translation housing, with the output end facing downward and equipped with an eel-plucking claw, the eel-plucking claw being formed by a vertical rod portion, an oblique rod portion and a claw portion connected in one body, the vertical rod portion of the eel-plucking claw being connected to the output end of the eel-plucking motor, the oblique rod portion being inclined downward based on the vertical rod portion, and the claw portion being connected to the lowest end of the oblique rod portion, so as to separate the accumulated and entangled eel groups.

3. The intelligent eel grading device based on roller grid according to claim 2 is characterized in that: The intelligent eel-pulling component also includes a depth camera for monitoring the aggregation state of eels, and the depth camera is connected to the lower side of the translation shell.

4. The intelligent eel grading device based on roller grid according to claim 3 is characterized in that: The intelligent eel-pulling component also includes an angle control motor, which is installed in the translation housing. The depth camera is connected to the output end of the angle control motor and rotates horizontally under the control of the angle control motor.

5. The intelligent eel grading device based on roller grid according to claim 2 is characterized in that: The intelligent eel-pulling component is equipped with a moving component, which is installed on the upper side of the grading bin. The moving component is transmission-connected with the translation shell of the intelligent eel-pulling component to drive the entire intelligent eel-pulling component to translate forward and backward.

6. The intelligent eel grading device based on roller grid according to claim 1 is characterized in that: A funnel is fixedly connected to the fish inlet side of the grading bin, and has a wider upper port and a narrower lower port. The lower port of the funnel faces all the fairings, and the fairings extend in an S shape as a whole.

7. The intelligent eel grading device based on roller grid according to claim 1 is characterized in that: A baffle is installed on the fish outlet side of the grading bin, and the baffle is used to block the upper space of the grading roller distribution area to block ungraded eels. The lower space of the grading roller distribution area accommodates graded eels. The part of the fish outlet side of the grading bin below the baffle is the fish outlet, and the fish outlet is connected to the lower space of the grading roller distribution area. The device also includes a camera bracket fixedly arranged at the fish outlet side of the grading bin, and a camera for detecting the number of eels leaving the grading bin is installed on the camera bracket.

8. The intelligent eel grading device based on roller grid according to claim 1 is characterized in that: The grading component comprises: An upper grading part is movably connected to the side wall of the grading bin, and a group of grading rollers at the upper position are connected to the upper grading part; An upper telescopic motor is fixedly connected to the side wall of the grading bin, and an output end thereof is connected to the upper grading part; The lower grading part is movably connected to the side wall of the grading bin and is located directly below the upper grading part. Another set of grading rollers located below is connected to the lower grading part. The lower telescopic motor is fixedly connected to the side wall of the grading bin, and the output end thereof is connected to the lower grading part.

9. An intelligent eel grading device based on a roller grid according to any one of claims 1 to 8, characterized in that: Also includes: A movable aluminum profile platform, wherein the position of the bottom of the grading bin corresponding to the fish outlet side is fixedly connected with an angle control support, and the angle control support is connected to the aluminum profile platform by rotating up and down through an angle control support shaft; The hydraulic base is equipped with a foot-operated hydraulic inclination controller, which is installed in the aluminum profile platform. The hydraulic base movably supports the position of the bottom of the grading bin corresponding to the fish inlet side, drives the grading bin to adjust its inclination with the angle control support axis as the rotation adjustment fulcrum, and makes the fish outlet side of the grading bin the lowest position.

10. A working method based on the intelligent eel grading device according to claim 1, characterized in that: At least the following steps are included: Pour the eels to be graded into the grading chamber from the fish inlet side of the grading chamber; Rectifiers are used to evenly control the flow of eels entering the room and block dead eels that have already died and stiffened. Adjust the two sets of grading rollers up and down to make the roller spacing match the width of the eel's head, so that the eels that meet the grading requirements can pass through the gap of the grading components, swim into the lower space of the grading components, and leave through the fish outlet side of the grading bin.

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