A non-destructive image acquisition and detection device for fish and shrimp body surface diseases and a method thereof

Abstract

The present application relates to the technical field of disease detection equipment, and discloses a fish and shrimp surface disease nondestructive image acquisition and detection device and method thereof, which comprises a detection machine, a camera, a workbench, a water circulation assembly and a convenient taking assembly. The water circulation assembly uses the porous pipe below the hole plate to suck the deposited impurities, and uses the suction head rising and falling with the water surface to suck the floating impurities, and the water flows through two-stage filter cartridges and then returns to the water tank. The convenient taking assembly uses the electric telescopic rod to drive the grid plate to flexibly push the fish and shrimp, and opens the valve plate through the pneumatic linkage of two air cylinders, so that the fish and shrimp enter the cylinder body, and then fall into the detachable net bag after the water in the cylinder body is pumped out. During detection, the sensor triggers light compensation and multi-view image acquisition, and the processing terminal identifies the fish and shrimp surface lesions. The present application can continuously keep the imaging water clean, reduce the false lesions formed by impurities and the identification error, and realize low-stress and nondestructive discharge of fish and shrimp.

Description

Technical Field

[0001] This invention belongs to the technical field of disease detection equipment, specifically, it relates to a non-destructive image acquisition and detection device and method for diseases on the body surface of fish and shrimp. Background Technology

[0002] The fish and shrimp surface disease non-destructive image acquisition and detection equipment is a set of aquatic testing equipment based on machine vision, which is non-contact and does not damage live fish and shrimp. The entire process does not involve dissection, scraping of body surface tissue, or anesthesia and harm to fish and shrimp. It automatically collects the texture, color, lesions, and damage characteristics of the entire body surface of fish and shrimp through high-definition, multispectral images. Combined with AI deep learning algorithms, it automatically identifies, quantifies, and issues warnings for surface diseases such as body rot, white spots, red spots, parasite attachment, fin rot, and molting damage, realizing an integrated equipment for fish disease screening.

[0003] The existing non-destructive image acquisition and detection equipment for fish and shrimp surface diseases works by placing the fish and shrimp to be detected in a water tank. When the fish and shrimp swim to the imaging area and block the infrared photoelectric sensor, the control system inside the detection machine receives a trigger signal and turns on the ring light. Simultaneously, a multi-view industrial camera equipped with a CMOS image sensor completes the shooting. The CMOS image sensor collects the light reflected from the surface of the fish and shrimp and converts it into digital image signals, which are transmitted to the processing terminal. After the terminal preprocesses the image, it uses deep learning AI algorithms to extract the features of surface lesions, automatically identifies the disease type, quantifies the severity of the lesions, and saves the image and detection data.

[0004] Currently, most mainstream dark chamber testing tanks on the market adopt a static water storage structure. During the testing process, the water is in a static state. During continuous testing, the excrement produced by the metabolism of fish and shrimp, the mucus shed from their bodies, and the floating impurities in the water will continue to be suspended in the static water. They cannot be discharged and purified in time, causing the water in the tank to gradually become turbid in a short period of time. Moreover, the suspended impurities are very easy to adhere to the surface of fish and shrimp. When the equipment collects images of the surface through the CMOS image sensor, it cannot effectively distinguish between the attached impurities and real micro-lesions. This easily causes image feature confusion, greatly increases the false judgment rate and false negative rate of AI recognition, and seriously affects the accuracy of fish and shrimp surface disease detection. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A non-destructive image acquisition and detection device for diseases on the body surface of fish and shrimp includes a detection machine, a camera, a worktable, a water circulation component, and a collection component; the detection machine is provided with an imaging cavity, the camera is set in the imaging cavity, and the worktable is located within the imaging range of the camera; The water circulation assembly includes a water tank, a perforated plate, a porous pipe, a first fitting, a first sleeve, a connecting pipe, a second sleeve, a filter element, a second fitting, and a water outlet. The water tank is placed on a workbench. The perforated plate is placed above the bottom of the water tank and forms a dirt collection space with the bottom wall of the water tank. The porous pipe is placed in the dirt collection space. The porous pipe is connected to the first sleeve through the first fitting. The first sleeve is connected to the second sleeve through the connecting pipe. Filter elements are installed in both the first and second sleeves. The second sleeve is connected to the water outlet through the second fitting. The water outlet end of the water outlet is connected to the water tank. The portable assembly includes a cylinder, an electric telescopic rod, a connecting rod, a rod, a grating plate, a first air cylinder, a first piston rod, a valve plate, a second air cylinder, a second piston rod, an air pipe, and a box-shaped component. The cylinder is connected to a water tank. The valve plate is movably disposed at the connection between the cylinder and the water tank. The output end of the electric telescopic rod is connected to the grating plate located in the water tank through the connecting rod and the rod. The connecting rod is driven by the second piston rod. The second air cylinder is connected to the first air cylinder through the air pipe. The first piston rod is driven by the valve plate. The box-shaped component is detachably disposed inside the cylinder.

[0006] In a preferred embodiment of the present invention, an infrared photoelectric sensor and a ring light are also provided in the imaging cavity. The camera is a plurality of industrial cameras equipped with CMOS image sensors, and the plurality of industrial cameras are respectively positioned facing the imaging area of ​​the water tank. The detection machine is provided with a control system and a processing terminal. The infrared photoelectric sensor, the ring light, the camera and the processing terminal are all electrically connected to the control system. The processing terminal is used to preprocess the acquired images and output the disease type and disease severity using a pre-trained disease identification model.

[0007] In a preferred embodiment of the present invention, the water circulation assembly further includes a third pipe, a round rod, a suction head, a float plate, and a first flexible hose. The third pipe is connected to a porous pipe, the suction head is connected to the third pipe through the first flexible hose, the float plate is disposed on the suction head so that the suction inlet of the suction head rises and falls with the liquid level in the water tank, and the round rod is disposed on the third pipe and is used to limit the range of motion of the suction head.

[0008] In a preferred embodiment of the present invention, pumps are respectively provided on the first pipe and the second pipe; the wall of the water tank is provided with a water inlet hole, the water outlet is corresponding to the water inlet hole, a baffle is provided on the inner side of the water inlet hole, and a rubber strip is provided between the baffle and the wall of the water tank to buffer the backflow water and prevent fish and shrimp from contacting the water inlet hole.

[0009] In a preferred embodiment of the present invention, the electric telescopic rod is disposed on the side of the water tank, the connecting rod is disposed across the water tank, the two ends of the connecting rod are respectively connected to the rod, the grid plate is connected between the two rods, and multiple rubber rods are spaced apart on the side of the grid plate facing the fish and shrimp.

[0010] In a preferred embodiment of the present invention, the second air cylinder is arranged along the moving direction of the connecting rod, and one end of the second piston rod extends out of the second air cylinder and is located on the moving path of the connecting rod; the first air cylinder is arranged on the side of the cylinder body, and the extended end of the first piston rod is connected to the valve plate, so that when the connecting rod pushes the second piston rod, the gas in the second air cylinder enters the first air cylinder through the air pipe and drives the first piston rod to open the valve plate.

[0011] In a preferred embodiment of the present invention, a mesh bag is provided inside the box-shaped component, and a round shaft and a limiting post are provided on the cylindrical body. A limiting buckle is rotatably provided on the round shaft, and the limiting buckle can cooperate with the limiting post to restrict the box-shaped component from being pulled out relative to the cylindrical body.

[0012] In a preferred embodiment of the present invention, the convenient assembly further includes a fourth tube, a second hose, a suction tube, and a shaft seat. A pump is provided on the fourth tube. One end of the fourth tube is connected to the first sleeve, and the other end is connected to the suction tube through the second hose. The suction tube is rotatably mounted on the cylinder through the shaft seat, and the suction end of the suction tube can extend into the area where the box-shaped component is located.

[0013] As a preferred embodiment of the present invention, the present invention also discloses a method for non-destructive image acquisition and detection of diseases on the body surface of fish and shrimp, comprising the following steps: S1. Pour the test water into the water tank and put in the fish and shrimp to be tested. Start the water circulation component. The sedimented impurities are sucked out through the porous tube under the perforated plate, and the floating impurities are sucked out through the suction head that rises and falls with the liquid level. The water containing impurities is filtered through the filter cartridges in the first sleeve and the second sleeve in sequence and then sent back to the water tank. S2. When fish and shrimp enter the imaging area and trigger the infrared photoelectric sensor, the ring light is turned on and multiple cameras are controlled to simultaneously acquire images of the fish and shrimp body surface. The processing terminal processes the images of the fish and shrimp body surface to obtain the detection results of fish and shrimp body surface diseases. S3. After the test is completed, control the electric telescopic rod to drive the grid plate to move towards the cylinder. At the same time, the connecting rod pushes the second piston rod, so that the gas in the second air cylinder enters the first air cylinder through the air pipe. This drives the first piston rod to open the valve plate and flexibly guide the fish and shrimp into the cylinder. S4. Control the electric telescopic rod to reset so that the valve plate is closed, start the pump on the fourth pipe to pump out the water in the cylinder, so that the fish and shrimp fall into the net bag in the box-shaped part; S. Release the limit buckle on the box-shaped part, and turn the straw away from the box-shaped part to pull out the box-shaped part to take out the fish and shrimp.

[0014] In a preferred embodiment of the present invention, step S2, processing the fish and shrimp body surface image includes: performing distortion correction, noise reduction, and color normalization on the multi-view image; generating a target region based on the fish and shrimp body surface contour; identifying the location and type of lesions within the target region using a pre-trained lesion segmentation and classification model; determining the lesion area ratio based on the ratio of the lesion pixel area to the target region area on the fish and shrimp body surface, and determining the severity of the disease by combining the number of lesions, color differences, and texture differences.

[0015] Compared with the prior art, the present invention has the following advantages: The porous tubes below the perforated plate absorb deposited impurities in a surface manner, while the floating suction head simultaneously absorbs floating impurities on the water surface. This system can remove impurities from both the bottom and the surface of the tank, reducing water turbidity and the probability of impurities adhering to the surface of fish and shrimp.

[0016] The filter elements in the first and second sleeves form a two-stage filtration path. The purified water flows back to the water tank, which can maintain the clean water environment required for continuous testing while reducing the amount of water exchanged.

[0017] The baffle and rubber strip at the return water position can buffer the return water and reduce the disturbance of water flow to the imaging area and the posture of fish and shrimp, which is conducive to obtaining clear and stable surface images.

[0018] The electric telescopic rod drives the grid plate to move and opens the valve plate synchronously through the pneumatic circuit. The fish and shrimp can be guided and the channel opened in one drive process. The actions are coordinated and avoid mismatch in valve plate opening timing.

[0019] The rubber rods on the grating plate make flexible contact with the fish and shrimp. After the fish and shrimp enter the cylinder, they fall into the net bag by lowering the water level. There is no need for repeated chasing with a landing net or rigid clamping, which can reduce stress and secondary damage to the fish and shrimp.

[0020] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0021] In the attached diagram: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of a partial three-dimensional structure; Figure 3 This is another perspective view of the water tank of the present invention; Figure 4 This is a partial cross-sectional view of the perforated plate of the present invention; Figure 5 This is a three-dimensional structural diagram of the filter element of the present invention; Figure 6 This is a three-dimensional structural diagram of the limiting buckle of the present invention; Figure 7 This is a three-dimensional structural diagram of the box-shaped component of the present invention; Figure 8 For the present invention Figure 7 A magnified view of a portion of the image; Figure 9 This is a three-dimensional structural diagram of the grating plate of the present invention.

[0022] In the diagram: 1. Testing machine; 2. Camera; 3. Workbench; 4. Water circulation assembly; 41. Water tank; 42. Perforated plate; 43. Porous pipe; 44. First fitting; 45. First sleeve; 46. Connecting pipe; 47. Second sleeve; 48. Filter element; 49. Second fitting; 410. Water outlet; 411. Third fitting; 412. Round rod; 413. Suction head; 414. Float; 415. First flexible hose; 416. Water inlet; 417. Baffle; 418. Rubber strip; 5. Convenience Take the components; 51. Cylinder; 52. Electric telescopic rod; 53. Connecting rod; 54. Rod; 55. Grating plate; 56. Rubber rod; 57. First air cylinder; 58. First piston rod; 59. Valve plate; 510. Second air cylinder; 511. Second piston rod; 512. Air pipe; 513. Box-shaped part; 514. Net bag; 515. Round shaft; 516. Limiting post; 517. Limiting buckle; 518. Fourth pipe fitting; 519. Second hose; 520. Suction straw; 521. Shaft seat. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0024] like Figure 1 As shown, the non-destructive image acquisition and detection device for fish and shrimp surface diseases in this embodiment includes a detection machine 1, a camera 2, a worktable 3, a water circulation component 4, and a convenient access component 5. The detection machine 1 forms a relatively closed imaging cavity that can block ambient light. An openable door is provided on the front side of the detection machine 1 to place the fish and shrimp to be detected, maintain the water tank 41, and replace the filter element 48. The worktable 3 is located at the lower part of the imaging cavity, and the water tank 41 is fixedly or detachably mounted on the worktable 3.

[0025] Cameras 2 are positioned above and / or to the side of the water tank 41, preferably multiple industrial cameras equipped with CMOS image sensors, to acquire images of the fish's back, abdomen, and sides. An infrared photoelectric sensor and a ring light are installed within the imaging cavity, with the light path of the infrared photoelectric sensor passing through a predetermined imaging area. When fish or shrimp enter this imaging area, the control system receives an obstruction signal, controls the ring light to turn on, and controls the multiple cameras 2 to simultaneously expose. A processing terminal is connected to the cameras 2 to receive and process the images of the fish and shrimp's bodies.

[0026] like Figure 2 , Figure 4 , Figure 6 and Figure 7 As shown, the water tank 41 is an open-topped tank, with a perforated plate 42 mounted above its bottom. The perforated plate 42 has multiple through holes, the size of which is designed to allow excrement, shed mucus clumps, and small impurities to pass through while preventing fish and shrimp from entering below it. A collection space is formed between the perforated plate 42 and the bottom wall of the water tank 41, allowing deposited impurities to separate from the fish and shrimp's activity area under gravity, preventing the fish and shrimp from repeatedly stirring up bottom impurities while swimming.

[0027] like Figure 3 and Figure 5 As shown, a porous pipe 43 extends along the sludge collection space, and multiple suction holes are provided on the pipe wall of the porous pipe 43. One end of the first pipe fitting 44 is connected to the porous pipe 43, and the other end is connected to the first sleeve 45. A pump is installed on the first pipe fitting 44. After the pump is started, a negative pressure is formed inside the porous pipe 43, and the water and sediment in the sludge collection space are evenly sucked in through the multiple suction holes, reducing the cleaning dead zones caused by localized suction only near a single drain outlet.

[0028] The third fitting 411 is connected to the porous tube 43, and the third fitting 411 is connected to the suction head 413 via the first flexible tube 415. The suction head 413 is preferably elongated and extends along one side of the water tank 41. A float 414 is provided on the suction head 413 to provide buoyancy, ensuring that the suction port of the suction head 413 is always near the liquid surface. The round rod 412 is used to guide or limit the range of motion of the suction head 413 and the first flexible tube 415. When the porous tube 43 forms a negative pressure, the third fitting 411 and the suction head 413 simultaneously generate suction, sucking up the mucus, foam, and light impurities floating on the water surface, thereby achieving simultaneous removal of bottom sediment and floating impurities.

[0029] Both the first sleeve 45 and the second sleeve 47 are filter housings capable of accommodating the filter element 48. The filter element 48 is detachable for cleaning or replacement. The first sleeve 45 is connected to the second sleeve 47 via a connecting pipe 46. Water containing impurities enters the first sleeve 45 for primary filtration and then enters the second sleeve 47 for fine filtration. The filter element 48 can be composed of a filter screen, filter cotton, or a combination of coarse and fine filter layers, depending on the amount of impurities in the water. One end of the second pipe fitting 49 is connected to the second sleeve 47, and the other end is connected to the outlet head 410. A pump is installed on the second pipe fitting 49 to transport the filtered water to the outlet head 410.

[0030] like Figure 7 and Figure 8 As shown, the tank wall of the water tank 41 is provided with a water inlet hole 416, and the water outlet 410 is located outside the water inlet hole 416 or communicates with the water inlet hole 416. A baffle 417 is provided inside the water inlet hole 416, and a rubber strip 418 is provided between the baffle 417 and the tank wall. When the filtered water flows back through the water inlet hole 416, the baffle 417 disperses and guides the water flow, reducing the jet velocity. The rubber strip 418 is used to flexibly seal the gap between the baffle 417 and the water tank 41, and to prevent the fins or tentacles of fish and shrimp from entering the water inlet hole 416. The baffle 417 can also allow the backflowing water to diffuse along the tank wall, reducing direct disturbance to the imaging area.

[0031] like Figure 2 , Figure 6 and Figure 9 As shown, the electric telescopic rod 52 is installed along the side of the water tank 41, and its output end is connected to the connecting rod 53 spanning the water tank 41. Both ends of the connecting rod 53 are connected to rod members 54, and a grid plate 55 is disposed between the two rod members 54. When the electric telescopic rod 52 extends, the connecting rod 53, rod members 54, and grid plate 55 move together towards the cylinder 51. Multiple rubber rods 56 are installed on the grid plate 55. The rubber rods 56 can elastically deform upon contact with fish and shrimp, flexibly reducing the activity space of fish and shrimp within the water tank 41 and guiding them towards the cylinder 51. The grid plate 55 has gaps for water flow, so it does not create a large-area water-pushing impact during movement.

[0032] A cylinder 51 is connected to one end of a water tank 41, forming a passageway between the cylinder 51 and the water tank 41 for fish and shrimp to pass through. A valve plate 59 is located at the passageway, and a first air cylinder 57 is located on the side of the cylinder 51. A first piston rod 58 is connected to the valve plate 59. A second air cylinder 510 is positioned along the moving direction of the connecting rod 53, with a second piston rod 511 extending out of the second air cylinder 510 and located on the moving path of the connecting rod 53. The second air cylinder 510 is connected to the first air cylinder 57 via an air pipe 512. When the connecting rod 53 moves towards the cylinder 51 and pushes the second piston rod 511, gas in the second air cylinder 510 enters the first air cylinder 57 through the air pipe 512. The first piston rod 58 is pressed and moves, causing the valve plate 59 to open. Thus, as the grid plate 55 approaches the cylinder 51, the passageway automatically opens, preventing fish and shrimp from being pushed to the closed valve plate 59.

[0033] When the electric telescopic rod 52 reverses its direction, the connecting rod 53 separates from the second piston rod 511. The second piston rod 511 and the first piston rod 58 reset under the action of air pressure balance, a reset elastic element, or their own weight, and the valve plate 59 re-closes the communication port. In specific implementations, a reset spring can be installed in the first air cylinder 57 or the second air cylinder 510 to improve the reliability of the valve plate 59 closing. A flexible seal can be installed between the valve plate 59 and the communication port to reduce water leakage after closure.

[0034] like Figure 4 , Figure 6 and Figure 7 As shown, the box-shaped component 513 can be inserted into or removed from the side of the cylinder 51, and a net bag 514 is provided inside the box-shaped component 513. A round shaft 515 and a limiting post 516 are provided on the cylinder 51, and a limiting buckle 517 is rotatably mounted on the round shaft 515. When the limiting buckle 517 rotates to the position where it engages with the limiting post 516, the box-shaped component 513 is confined within the cylinder 51; rotating the limiting buckle 517 in the opposite direction releases the confinement of the box-shaped component 513. This structure facilitates the quick removal of fish and shrimp from the net bag 514 and facilitates the cleaning and disinfection of the box-shaped component 513 and the net bag 514.

[0035] like Figures 3 to 5 As shown, one end of the fourth pipe fitting 518 is connected to the first sleeve 45 or the water circulation pipeline, and the other end of the fourth pipe fitting 518 is connected to the suction pipe 520 through the second flexible hose 519. A pump is installed on the fourth pipe fitting 518. The suction pipe 520 is rotatably mounted on the cylinder 51 via a bearing 521. In the pumping state, the suction pipe 520 extends into the area of ​​the cylinder 51 or the box-shaped component 513. When it is necessary to remove the box-shaped component 513, the bearing 521 can be rotated to make the suction pipe 520 deviate from the extraction path of the box-shaped component 513. The pumped water enters the first sleeve 45 for filtration and then re-enters the circulation, reducing water waste.

[0036] The image processing procedure in this embodiment may include: performing distortion correction, noise reduction, and white balance or color normalization on images acquired by multiple cameras 2; segmenting the background water body according to the fish and shrimp outlines to obtain the target area on the fish and shrimp body surface; training a lesion segmentation and classification model using pre-collected and labeled disease samples, and outputting the lesion area and disease category through the model; calculating the ratio of the lesion area area to the target area on the body surface, and classifying the severity of the disease by combining the number of lesions, color differences, and texture differences. The processing terminal saves the original image, lesion-labeled image, disease category, severity, and detection time in association.

[0037] The detection method of this invention is as follows: First, an appropriate amount of detection water is injected into the water tank 41. The fish and shrimp to be detected are placed in the water tank 41, and the pumps on the first pipe 44 and the second pipe 49 are started, so that the water continuously undergoes bottom suction, surface suction, two-stage filtration, and slow-flow return processes. After the fish and shrimp enter the imaging area and block the infrared photoelectric sensor, the control system turns on the ring supplement light, and multiple cameras 2 simultaneously acquire images. The processing terminal completes disease identification and data storage.

[0038] After the test is completed, the electric telescopic rod 52 is activated. The grid plate 55 drives the rubber rod 56 to move towards the cylinder 51 and gradually guide the fish and shrimp. At the same time, the connecting rod 53 pushes the second piston rod 511, and the gas in the second air cylinder 510 enters the first air cylinder 57 through the air pipe 512. The first piston rod 58 drives the valve plate 59 away from the connecting port. After the fish, shrimp and some water enter the cylinder 51 through the connecting port, the electric telescopic rod 52 is controlled to reverse and reset, so that the valve plate 59 closes again.

[0039] The pump on the fourth fitting 518 is then activated, and water in the cylinder 51 is drawn into the first sleeve 45 for filtration through the suction pipe 520, the second flexible hose 519, and the fourth fitting 518. When the water level in the cylinder 51 drops below the upper edge of the box-shaped component 513, the fish and shrimp fall into the net bag 514 as the water slowly descends. The limit buckle 517 is rotated to release the limit, and the shaft seat 521 is rotated to allow the suction pipe 520 to avoid the box-shaped component 513. The fish and shrimp can then be removed by pulling out the box-shaped component 513. Throughout the entire discharge process, there is no need to use a scoop net to chase or clamp the fish and shrimp, reducing damage to their bodies and stress responses.

[0040] The implementation principle of this invention is as follows: When inspecting fish and shrimp, the fish and shrimp to be inspected are first placed in the water tank 41. When the fish and shrimp swim to the imaging area and block the infrared photoelectric sensor in the cavity of the inspection machine 1, the control system of the inspection machine 1 receives the trigger signal and turns on the ring light in the cavity. The multi-view industrial camera 2 equipped with a CMOS image sensor simultaneously completes the shooting. The CMOS image sensor collects the light reflected from the surface of the fish and shrimp and converts it into digital image signals, which are transmitted to the processing terminal. After the terminal preprocesses the image, it uses deep learning AI algorithms to extract the features of lesions on the body surface, automatically identifies the type of disease, quantifies the severity of the lesions, and saves the image and detection data, thus completing the disease detection of the fish and shrimp body surface.

[0041] First, the sediment and residual impurities in the water tank 41 fall to the bottom of the water tank 41 through the perforated plate 42. Then, the pump on the first pipe fitting 44 is activated, creating negative pressure and suction in the first pipe fitting 44 and the porous pipe 43. This suction draws the impurities and water from the bottom of the water tank 41 into the porous pipe 43. Simultaneously, under the buoyancy of the float plate 414, the suction head 413 remains floating on the water surface at the same height as the water surface in the water tank 41. When suction is generated in the porous pipe 43, suction is also generated in the third pipe fitting 411. This suction in the suction head 413 draws the impurities floating on the water surface into the third pipe fitting 411 through the first flexible hose 415. From there, the impurities enter the porous pipe 43, where the water collected inside the porous pipe 43 flows... The water, along with impurities, is transported to the first sleeve 45 through the first pipe fitting 44. The filter element 48 inside the first sleeve 45 performs initial filtration and purification of the impurities and water. The filtered and purified water then enters the second sleeve 47 through the connecting pipe, where it undergoes secondary filtration and purification by the filter element 48 inside the second sleeve 47. At this point, multiple filtration and purification of sedimented and floating impurities in the water are completed. Then, the pump on the second pipe fitting 49 is started, creating negative pressure and suction inside the second pipe fitting 49. The purified water in the second sleeve 47 is drawn into the outlet head 410 through the second pipe fitting 49, and then flows back into the water tank 41 through the inlet hole 416 from the outlet head 410, thus completing the circulation and purification of the water source in the water tank 41.

[0042] After the fish and shrimp have been tested, the electric telescopic rod 52 is activated, which moves the connecting rod 53 towards the water tank 41. The connecting rod 53 moves the rod 54, which in turn moves the grid plate 55 into the water tank 41. The grid plate 55 moves multiple rubber rods 56, which in turn drive the fish or shrimp in the water tank 41 toward the valve plate 59. At the same time, the connecting rod 53 pushes the second piston rod 511 into the second air cylinder 510 and moves it toward the valve plate 59. During the movement, the second piston rod 511 uses a piston to force the gas inside the second air cylinder 510 into the air pipe 512, and then into the first air cylinder 57. This causes the first piston rod 58 inside the first air cylinder 57 to move away from the air pipe 512 due to the air pressure. During the movement, the first piston rod 58 pushes the valve plate 59 away from the cylinder 51, thus releasing the seal between the cylinder 51 and the water tank 41. Water and fish and shrimp driven by the grille 55 swim into the cylinder 51, placing the fish and shrimp above the box-shaped component 513. Then, the electric telescopic rod 52 operates again, resetting the valve plate 59 in the reverse order. After the valve plate 59 is reset, it seals the connection between the cylinder 51 and the water tank 41 again. Then, the pump on the fourth pipe 518 is started, creating negative pressure and suction within the fourth pipe 518, the second hose 519, and the suction pipe 520, drawing out excess water from the cylinder 51 and into the... The filter and circulation are carried out in a set of cylinder 45. When the water level in the cylinder 51 drops to slightly below the edge height of the box-shaped part 513, the fish and shrimp in the cylinder 51 fall into the net bag 514 inside the box-shaped part 513. Then, the limit buckle 517 is manually rotated to release the restriction on the box-shaped part 513. At the same time, the shaft seat 521 is manually rotated to make the suction tube 520 rotate and tilt to disengage from the box-shaped part 513. Then, the box-shaped part 513 is manually pulled out to bring the fish and shrimp out, thus completing the non-destructive removal of the fish and shrimp from the tank 41.

[0043] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A non-destructive image acquisition and detection device for diseases on the body surface of fish and shrimp, characterized in that, It includes a testing machine (1), a camera (2), a worktable (3), a water circulation component (4), and a convenient component (5); the testing machine (1) is provided with an imaging cavity, the camera (2) is set in the imaging cavity, and the worktable (3) is located within the imaging range of the camera (2); The water circulation component (4) includes a water tank (41), a perforated plate (42), a porous pipe (43), a first pipe fitting (44), a first sleeve (45), a connecting pipe (46), a second sleeve (47), a filter element (48), a second pipe fitting (49), and a water outlet (410). The water tank (41) is set on the workbench (3), and the perforated plate (42) is set above the bottom of the water tank (41) and forms a dirt collection space between it and the bottom wall of the water tank (41). The perforated tube (43) is installed in the sludge collection space. The perforated tube (43) is connected to the first sleeve (45) through the first fitting (44). The first sleeve (45) is connected to the second sleeve (47) through the connecting pipe (46). The first sleeve (45) and the second sleeve (47) are both equipped with filter elements (48). The second sleeve (47) is connected to the water outlet (410) through the second fitting (49). The water outlet end of the water outlet (410) is connected to the water tank (41). The portable assembly (5) includes a cylinder (51), an electric telescopic rod (52), a connecting rod (53), a rod (54), a grid plate (55), a first air cylinder (57), a first piston rod (58), a valve plate (59), a second air cylinder (510), a second piston rod (511), an air pipe (512), and a box-shaped component (513). The cylinder (51) is connected to the water tank (41), and the valve plate (59) is movably disposed between the cylinder (51) and the water tank (41). At the connection point of 1), the output end of the electric telescopic rod (52) is connected to the grid plate (55) located in the water tank (41) through the connecting rod (53) and the rod (54). The connecting rod (53) is driven to cooperate with the second piston rod (511). The second air cylinder (510) is connected to the first air cylinder (57) through the air pipe (512). The first piston rod (58) is driven to connect with the valve plate (59). The box-shaped part (513) is detachably installed in the cylinder (51).

2. The non-destructive image acquisition and detection device for fish and shrimp surface diseases according to claim 1, characterized in that, The imaging cavity is also equipped with an infrared photoelectric sensor and a ring light. The camera (2) is a plurality of industrial cameras equipped with CMOS image sensors. The plurality of industrial cameras are respectively positioned facing the imaging area of ​​the water tank (41). The detection machine (1) is equipped with a control system and a processing terminal. The infrared photoelectric sensor, the ring light, the camera (2) and the processing terminal are all electrically connected to the control system. The processing terminal is used to preprocess the acquired images and output the disease type and disease severity using a pre-trained disease identification model.

3. The non-destructive image acquisition and detection device for fish and shrimp surface diseases according to claim 1, characterized in that, The water circulation assembly (4) further includes a third pipe (411), a round rod (412), a suction head (413), a float (414), and a first hose (415). The third pipe (411) is connected to the porous pipe (43). The suction head (413) is connected to the third pipe (411) through the first hose (415). The float (414) is set on the suction head (413) so that the suction port of the suction head (413) rises and falls with the liquid level in the water tank (41). The round rod (412) is set on the third pipe (411) and is used to limit the range of motion of the suction head (413).

4. The non-destructive image acquisition and detection device for fish and shrimp surface diseases according to claim 3, characterized in that, Pumps are respectively installed on the first pipe fitting (44) and the second pipe fitting (49); the wall of the water tank (41) is provided with a water inlet hole (416), the water outlet (410) corresponds to the water inlet hole (416), a baffle (417) is provided on the inner side of the water inlet hole (416), and a rubber strip (418) is provided between the baffle (417) and the wall of the water tank (41) to buffer the backflow water and prevent fish and shrimp from contacting the water inlet hole (416).

5. The non-destructive image acquisition and detection device for fish and shrimp surface diseases according to claim 1, characterized in that, The electric telescopic rod (52) is set on the side of the water tank (41), the connecting rod (53) is set across the water tank (41), the two ends of the connecting rod (53) are respectively connected to the rod (54), the grid plate (55) is connected between the two rods (54), and multiple rubber rods (56) are spaced apart on the side of the grid plate (55) facing the fish and shrimp.

6. The non-destructive image acquisition and detection device for fish and shrimp surface diseases according to claim 5, characterized in that, The second air cylinder (510) is arranged along the moving direction of the connecting rod (53), and one end of the second piston rod (511) extends out of the second air cylinder (510) and is located on the moving path of the connecting rod (53); the first air cylinder (57) is arranged on the side of the cylinder body (51), and the extended end of the first piston rod (58) is connected to the valve plate (59) so that when the connecting rod (53) pushes the second piston rod (511), the gas in the second air cylinder (510) enters the first air cylinder (57) through the air pipe (512) and drives the first piston rod (58) to open the valve plate (59).

7. The non-destructive image acquisition and detection device for fish and shrimp surface diseases according to claim 1, characterized in that, The box-shaped component (513) is provided with a net bag (514), and the cylindrical body (51) is provided with a round shaft (515) and a limiting post (516). A limiting buckle (517) is rotatably provided on the round shaft (515). The limiting buckle (517) can cooperate with the limiting post (516) to restrict the box-shaped component (513) from being pulled out relative to the cylindrical body (51).

8. The non-destructive image acquisition and detection device for fish and shrimp surface diseases according to claim 7, characterized in that, The convenient assembly (5) also includes a fourth tube (518), a second hose (519), a suction tube (520), and a bearing (521). A pump is provided on the fourth tube (518). One end of the fourth tube (518) is connected to the first sleeve (45), and the other end is connected to the suction tube (520) through the second hose (519). The suction tube (520) is rotatably mounted on the cylinder (51) through the bearing (521), and the suction end of the suction tube (520) can extend into the area where the box-shaped component (513) is located.

9. A method for non-destructive image acquisition and detection of diseases on the body surface of fish and shrimp, using the non-destructive image acquisition and detection device for diseases on the body surface of fish and shrimp as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Pour the test water into the water tank (41) and put in the fish and shrimp to be tested. Start the water circulation component (4). The porous tube (43) under the perforated plate (42) sucks up the deposited impurities and the suction head (413) that rises and falls with the liquid level sucks up the floating impurities. The water containing impurities is filtered through the filter element (48) in the first sleeve (45) and the second sleeve (47) and then sent back to the water tank (41). S2. When the fish and shrimp enter the imaging area and trigger the infrared photoelectric sensor, turn on the ring light and control multiple cameras (2) to simultaneously collect images of the fish and shrimp body surface. The processing terminal processes the images of the fish and shrimp body surface to obtain the detection results of fish and shrimp body surface diseases. S3. After the test is completed, control the electric telescopic rod (52) to drive the grid plate (55) to move towards the cylinder (51), and at the same time, the connecting rod (53) pushes the second piston rod (511) so that the gas in the second air cylinder (510) enters the first air cylinder (57) through the air pipe (512), and drives the first piston rod (58) to open the valve plate (59) to flexibly guide the fish and shrimp into the cylinder (51); S4. Control the electric telescopic rod (52) to reset so that the valve plate (59) is closed, start the pump on the fourth pipe (518) to pump out the water in the cylinder (51) so that the fish and shrimp fall into the net bag (514) in the box-shaped part (513); S5. Release the limit buckle (517) from the box-shaped part (513) and turn the straw (520) away from the box-shaped part (513) to take out the fish and shrimp.

10. The method for non-destructive image acquisition and detection of diseases on the body surface of fish and shrimp according to claim 9, characterized in that, In step S2, the processing of the fish and shrimp body surface images includes: performing distortion correction, noise reduction, and color normalization on multi-view images; generating target regions based on the fish and shrimp body surface contours; identifying the location and type of lesions within the target regions using a pre-trained lesion segmentation and classification model; determining the proportion of lesion area based on the ratio of lesion pixel area to the area of ​​the target region on the fish and shrimp body surface, and determining the severity of the disease by combining the number of lesions, color differences, and texture differences.

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