Lightweight multi-fingerling and fry counting equipment based on computer vision and use method of lightweight multi-fingerling and fry counting equipment

Abstract

The invention discloses a lightweight multi-fingerling and fry counting device based on computer vision and a use method thereof, and belongs to the technical field of machine vision and machinery, and the lightweight multi-fingerling and fry counting device comprises a water flow conveying device and a counting and processing device. Wherein the water flow conveying equipment is composed of a fish inlet funnel, two different water conveying pipelines, a fish fry slideway and a fish outlet, the fish inlet is funnel-shaped, water flow conveying is adopted, the inclination angle of the water flow conveying equipment can ensure that fish fries are not clamped in the fish inlet, meanwhile, the water flow is ensured to wash the fish fries into the slideway, and the water conveying pipelines are all plastic pipelines. The fish inlet funnel and the fry slideway are made of plastic materials with frosted surfaces, and are more resistant to seawater corrosion compared with metal materials. The counting and processing device is composed of a camera at the top of the device, a displayer and a computer host at the bottom, and the compatibility and real-time computing capacity of different algorithms are effectively improved. According to the invention, counting work can be carried out on different types of fish, a large amount of plastic and lightweight aluminum metal are used, and the size and the weight of equipment are obviously reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of computer vision and mechanical technology, relates to the field of fry quantity statistics such as proliferation release, aquaculture and fry sales, and particularly relates to the field of multi-fry counting based on flowing water state. BACKGROUND

[0002] As the world's largest producer and consumer of aquatic products, China's aquaculture industry plays a vital role in the national economy. The accurate statistics of fry quantity has become a core link driving the high-quality development of the industry. With accurate counting, aquaculture practitioners can scientifically plan the stocking density and maximize the utilization of water resources, thereby avoiding problems such as survival competition, insufficient dissolved oxygen, and disease transmission caused by density imbalance. This not only significantly improves the effectiveness of aquaculture, but also provides data support for aquaculture practitioners to grasp the activity and growth trend of fry, and then accurately adjust the feeding strategy and water quality control scheme, thereby optimizing the efficiency of aquaculture. In addition, fry counting is a key basis for aquaculture economic accounting, which helps practitioners accurately assess the stocking quantity and survival rate, scientifically measure costs and benefits, avoid economic losses caused by quantity deviation, and maximize the benefits of the entire aquaculture process. Therefore, multi-fry counting technology and equipment with high efficiency and high precision have become an urgent need in the current aquaculture industry.

[0003] For a long time, fry counting in the field of aquaculture has mainly relied on manual operation and simple tools such as nets and containers. This traditional mode has many limitations, which seriously restricts the improvement of aquaculture efficiency and data accuracy.

[0004] Specifically, the drawbacks of manual counting mainly lie in three aspects: first, accuracy cannot be guaranteed. Aquaculture personnel are easily affected by factors such as fatigue and attention fluctuations during the counting process, which can easily result in missed counts and repeated counts, especially when dealing with multiple fish fry with significant size differences, the error will be further magnified, directly leading to distorted statistical data and laying hidden dangers for subsequent aquaculture decisions. Second, the problem of low efficiency is prominent. The quantity of fry in large-scale aquaculture farms often reaches hundreds of thousands or even more, relying solely on manual counting not only consumes time and effort, but even experienced staff may struggle to balance speed and accuracy when faced with a large number of diverse fish fry. This inefficient mode not only increases labor costs, but also may delay the connection of aquaculture stages, and cannot provide real-time and continuous data feedback, posing a great challenge to fine aquaculture management. Third, there is a potential threat to the survival of fry. In high-density fry farms, traditional counting requires fish fry to be removed from the original environment and concentrated in small containers for operation, which not only intensifies the density pressure due to space compression, but also may cause problems such as oxygen deficiency and stress in fish fry, reducing survival rate; for multi-fish fry mixed culture scenes, mixed fishing operations may also cause mutual disturbance and harm between different fish fry.

[0005] Some of the current market automation counting equipment, although in the efficiency of the breakthrough, but in the multi-fish species adaptation, equipment portability and counting precision and other core dimensions still have obvious short board. Most of the equipment can only deal with single fish counting, which cannot meet the actual needs of multi-fish mixed culture; due to the large size, it is difficult to move, and it is difficult to adapt to the flexible deployment of different breeding sites; in addition, it is still a technical problem that has not been solved in the industry to realize the rapid identification and accurate counting of multi-fish fry in flowing water environment. Therefore, the development of a device integrating light weight, multi-fish species compatibility and high precision counting has become the key to solving the industry pain points. SUMMARY

[0006] The present application aims at the problems of low efficiency, high cost and difficult management in manual counting of fry in the prior art, and proposes a light multi-fish fry counting device based on computer vision and its use method. The present application focuses on multi-fish flow counting scene, aiming to provide an integrated fry counting device and control system. While meeting the high-precision counting, it emphasizes the adaptation of multi-fish species differences, and takes into account the operation convenience and device transportability in different breeding and sales scenes, and minimizes the fish body damage in the fry counting process. After multiple prototype testing and iterative optimization, a mature light multi-fish fry counting device and system based on computer vision is finally formed, which breaks through the bottleneck of traditional counting mode through the deep integration of mechanical structure and computer vision technology.

[0007] The technical scheme adopted by the present application to solve its technical problems is: a light multi-fish fry counting device based on computer vision, comprising a water flow auxiliary device, a fry conveying device, a visual counting interactive device and a mobile support device.

[0008] The water flow auxiliary device comprises a water pipe 1 and a water pipe 3, which is used for water conveying to promote the flow of fry;

[0009] The fry conveying device comprises a fish inlet funnel 2, a slide and a fish outlet 5. The fish inlet funnel 2 is used for fry input, and the slide and the fish outlet 5 are made of plastic material. The fry flows out of the fish outlet 5 through the slide;

[0010] The visual counting interactive device comprises a display 4 and a computer host 7. The display 4 is connected with the computer host 7. The computer host 7 runs the computer vision fry counting algorithm, and the display 4 is used for displaying the counting result information.

[0011] The mobile support device comprises a support and a universal wheel 6. The support is used for supporting the device main body, and the universal wheel 6 is made of rubber material, which has the characteristics of anti-shake and wear resistance, and facilitates the movement of the device;

[0012] When the device is in operation, the fry enters through the fish inlet funnel 2, the water pipes 1 and 3 push the fry to flow in the device, and the fry flows out from the fish outlet 5 through the relevant path, in the process of flowing, the computer host 7 obtains the fry image information and counts by running the algorithm, with the help of the appropriate image acquisition mode, and the image acquisition component, that is, the camera, adapted to the device, the counting result is presented on the display 4, and the universal wheel 6 assists the flexible movement and position adjustment of the device.

[0013] Further, the water pipes 1 and 3 of the water flow auxiliary device adopt a double-path independent control design, each water pipe is equipped with a precise flow regulating valve, the speed and flow of the two water flows are adjusted respectively, the water flow pushing force can be flexibly adjusted according to the size and swimming characteristics of different fry, the problem of fry accumulation or impact damage caused by single water flow control is avoided, and the stability and adaptability of fry flow are significantly improved.

[0014] Further, the inner wall of the fish inlet funnel 2 of the fry conveying device is treated with frosted plastic, and the surface friction coefficient is high, which can not only reduce the speed of the fry when entering, prevent the counting omission caused by the too high flow rate of the fry, but also has good water resistance and wear resistance, can long-term maintain the anti-sticking effect, and at the same time avoid chemical damage to the fry.

[0015] Further, the slide of the fry conveying device adopts an integrated design, the slide main body and the device frame are connected through a screw structure, users can quickly replace slide modules of different widths and slopes according to the size difference of different fry, without the need to overhaul the device, greatly improving the adaptive flexibility of the device for counting multiple fish species, and the replacement process is convenient and efficient, and a single person can operate.

[0016] Further, the computer host 7 of the visual counting interactive device is built-in a multi-fish species recognition model, the model is trained by a large number of different fry images of different fish species, and contains characteristic parameters of a plurality of common fry, users directly select the corresponding fish species through the interactive interface of the display 4, the computer host 7 can automatically call the matching recognition algorithm without manual parameter adjustment, and the counting accuracy is higher.

[0017] Further, the visual counting interactive device is equipped with a high-definition camera acquisition system, the high-definition camera is installed above the slide, the overhead camera captures the top-down image of the fry for counting, effectively solves the counting error caused by the low frame rate and slow transmission speed of the camera, and further improves the accuracy of multi-fish species counting.

[0018] Further, the support of the mobile support device is integrally formed of lightweight aluminum metal, which is significantly lighter than traditional metal supports, has higher structural strength and corrosion resistance, ensures lightweight equipment, effectively resists water vapor erosion in aquaculture environment, prolongs the service life of the equipment, and the support feet at the bottom of the support have adjustable height and are used in cooperation with the universal wheel 6 to stably place on uneven ground.

[0019] Further, the universal wheel 6 of the mobile support device has a built-in shock-absorbing mechanism composed of a high-elastic rubber pad and a damping spring, which can effectively absorb the vibration caused by the bumping of the ground during the movement of the equipment, avoid the vibration from causing the fish fry to deviate from the movement track in the slide and affecting the counting, and reduce the damage to the internal electronic components of the equipment caused by vibration, thereby improving the stability of the equipment operation.

[0020] Further, the device adopts lightweight design, the main structure is made of high-strength aluminum alloy and high-strength engineering plastic composite material, which ensures structural stability while significantly reducing overall weight; the overall volume of the device is optimized, and the functional modules are compactly integrated, the fish passage, the counting unit and the support structure form an integrated layout, the redundant space is reduced, and the device is convenient to carry and operate outdoors through the double optimization of material lightweight and structure miniaturization, which significantly improves the flexibility of the use scene and fully embodies the lightweight characteristics.

[0021] The application also provides a use method of the lightweight multi-fish fry counting device based on computer vision, which comprises the following steps:

[0022] Step 1: Turn on the power supply box matched with the device, connect the power supply of the computer host 7, the display 4 and the camera, connect the water pipes 1 and 3 with the external water source, open the valve of the water flow auxiliary device, and make the water flow slowly into the device to create a suitable water environment for the fish fry, and ensure that the water flow is smooth in the slide without obvious turbulence;

[0023] Step 2: Start the computer host 7 and the display 4, run the visual counting system, test whether the shooting picture of the camera is clear and whether the shooting range completely covers the counting area of the slide, and observe whether the water flow speed is moderate to support the fish fry to smoothly pass through the slide; if the operation effect of the device is not ideal, adjust the flow regulating valve of the water pipes 1 and 3 to change the water flow speed, or adjust the installation position and angle of the camera to optimize the shooting effect, and ensure that the fish fry is clear in the picture.

[0024] Step 3: According to the type and size of the fish fry to be counted, start the counting algorithm, then clean the foreign matters in the fish inlet and the slide to ensure that the fish fry can smoothly slide into the slide and avoid jamming or accumulation.

[0025] Step 4: Open the counting program in the interactive interface of the display 4, select the corresponding fish species from the multi-fish species identification model, then pour an appropriate amount of fry into the fish funnel 2, and observe whether the fry can smoothly enter the slide and pass through the counting area, check whether there are problems such as fish fry adhesion, jumping out or not being captured by the camera, if there are problems, adjust the water flow speed or clean the scratches on the inner wall of the slide, if necessary, recalibrate the shooting range of the camera;

[0026] Step 5: Select the online counting function, the system automatically calls the camera to obtain the fry image in the slide in real time, the computer host 7 runs the counting algorithm for real-time counting, and the counting result is displayed on the display 4 in real time, continuously pour the fry, until all the fish fry to be counted pass through the counting area, the system automatically accumulates the total count number;

[0027] Step 6: After counting is completed, turn off the power of the display 4, computer host 7 and camera in turn, close the valve of the water flow auxiliary device, disconnect the water pipes 1, 3 and the external water source, drain the residual water, if the equipment needs to be moved, use the universal wheel 6 to push the equipment to the storage position, and fix the equipment by placing the supporting feet at the bottom of the support; arrange and store the disassembled parts and matching tools to ensure that each part of the equipment is well preserved.

[0028] Advantages:

[0029] 1. The present application adopts integrated compact design, the internal sealing wiring box is integrated, the connection lines of electronic components such as computer host, display and camera are collected and stored, waterproof protection is effectively realized, the erosion of water vapor to circuit is avoided, at the same time, redundant storage structure is saved, the overall layout of the equipment is simplified, which is more suitable for scenes with external power supply such as breeding workshop and laboratory, and is convenient for daily operation and maintenance.

[0030] 2. The present application optimizes the fixed angle design according to the flow characteristics of multiple fish species, the inclination angles of the fish funnel and the slide are calibrated through a large number of tests, which can not only ensure the smooth sliding of small fry, but also adapt to the natural flow rhythm of slightly larger fry; combined with the adjustable external faucet water flow control, it can flexibly adapt to the swimming ability of different fish species, through the synergistic effect of water flow speed and fixed angle, it can ensure that the fry passes through the counting area in a stable posture in the slide, and improve the counting stability.

[0031] 3. The fish funnel and slide of the present application adopt frosted plastic material, the surface treatment considers smoothness and moderate friction, which can reduce the resistance of the fry when entering, and avoid the influence of too smooth surface on counting due to too fast sliding of the fry. At the same time, the waterfall design of the top water pipe can form uniform water flow to promote the orderly flow of fry in the slide, reduce the accumulation and crowding, indirectly play the role of similar flow distribution, and ensure that the camera can clearly capture the image of single fry.

[0032] 4. The display of the present application adopts an 11.6-inch 1080P touch display screen, which is embedded in the device main body and optimizes the screen angle, cooperates with the controllable lighting of the top lamp strip, and can clearly display the counting results and operation interface in different light environments; the touch interaction design simplifies the operation process, facilitates users to quickly call the fry mode and view the counting data, and improves the use convenience of outdoor and indoor scenes.

[0033] 5. The present application reduces fry adhesion through multiple designs, the frosted plastic material fish inlet funnel and the slide can reduce the adhesion probability of mucus on the surface of fish; the continuous flushing of the inner wall of the channel by the waterfall-shaped water flow can reduce the situation of fry retention due to mucus; at the same time, the fixed-angle slide design makes the water flow and gravity form a stable resultant force, which pushes the fry to flow continuously, avoids mutual adhesion caused by stagnation, and ensures uniform distribution of fry in the counting area.

[0034] 6. The present application combines computer vision technology and water conveying structure to realize efficient and accurate counting of multiple fry, replace traditional manual counting mode, greatly improve counting efficiency and reduce labor cost, provide reliable technical support for fry statistics in fishery production, and help the development of fishery mechanization and digitization. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is the overall use flowchart of the lightweight multi-fry counting device based on computer vision of the present application embodiment 1.

[0036] Figure 2 is a structural schematic diagram of the lightweight multi-fry counting device based on computer vision of the present application embodiment 1.

[0037] Explanation of signs: 1-fish inlet funnel, 2-fish inlet cover plate, 3-high-definition camera, 4-fish outlet, 5-light supplement lamp, 6-rubber universal wheel.

[0038] Figure 3 is a structural schematic diagram of the fish outlet angle of the lightweight multi-fry counting device based on computer vision of the present application embodiment 1.

[0039] Explanation of signs: 21-water inlet plastic pipe, 22-display, 23-slide, 24-fish outlet, 25-rubber universal wheel, 26-computer mainframe case.

[0040] Figure 4 is a structural schematic diagram of the back of the lightweight multi-fry counting device based on computer vision of the present application embodiment 1.

[0041] Labeling instructions: 31-Cable opening, 32-Rubber caster wheel, 33-Computer host chassis, 34-Water inlet plastic pipe, 35-Fish funnel, 36-Monitor. Detailed Implementation

[0042] The invention will now be described in further detail with reference to the accompanying drawings.

[0043] Example 1

[0044] This embodiment relates to a high-precision flowing water fish fry counting device based on machine vision, such as... Figures 2-4 As shown, the flowing water fish fry counting device includes a water flow conveying device, a fish fry diversion device, a counting processing device, and a mobile storage device.

[0045] like Figure 2 As shown, the water conveying device includes a water conveying pipe interface, a horizontal water storage section, and a water outlet; the water conveying pipe interface is located on the outside of the horizontal water storage section, and the water outlet is located at the bottom of the other side of the horizontal water storage section.

[0046] The water delivery device also includes a water supply pipe, which consists of a 20mm diameter rubber hose that can connect to a 20mm diameter iron water supply pipe interface. The water supply pipe is directly connected to an external faucet. The horizontal water storage section is designed with the stability of the water flow in mind, incorporating an internal buffer structure to reduce fluctuations caused by water flow impact. The horizontal water storage section has a perforated outlet, allowing water stored in the section to flow out evenly from the outlet, providing a stable propulsion for the movement of the fish fry.

[0047] The fish fry diversion device includes a fish inlet, a fish passageway (slide), and a fish outlet. For example... Figures 2-4 As shown, the fish passage (slide) is inclined and its angle is not adjustable. It is made of frosted plastic, which not only reduces the adhesion problem caused by the mucus on the surface of the fish fry but also has good corrosion resistance and wear resistance. To further improve the durability and safety of the equipment, the fish passage (slide) has comprehensive waterproof measures. Its surface is sprayed with a high-strength waterproof coating, and the joints are sealed with sealant to ensure that water will not seep into the equipment and affect the operation of electronic components. The fish inlet and fish outlet are respectively located at the top and bottom of the fish passage (slide). The bottom of the fish inlet is inclined and its angle is not adjustable. Its bottom end is rotatably connected to one end of the fish passage (slide), and the connection is also sealed and waterproofed to prevent water leakage. The other three edges of the fish inlet are equipped with baffles. The height of the baffles is optimized to prevent the fish fry from jumping out when entering the passage, and a horizontal water storage section is provided on the top baffle to ensure that water can be directly injected into the fish inlet, carrying the fish fry into the fish passage (slide).

[0048] The fish inlet is provided with a stretch handle made of anti-skid rubber material, facilitating the operator to hold and adjust.

[0049] The fish passage (slide) is the core area of the fry counting device, and as the main counting area, the main body is a rectangular channel, the surface of which is smooth and has no stripe-shaped notch, which can reduce the resistance and jamming during the flow of fry. The bottom of the fish passage (slide) is provided with a light supplement lamp, which is an energy-saving LED lamp strip, uniformly distributed and with adjustable brightness in multiple gears. The light intensity can be adjusted to the best according to the body color and size of different fry, so that the camera can clearly capture the image of the fry. The top of the fish passage (slide) is provided with a counting processing device, and the connecting gap between the device and the channel is waterproof sealed, further ensuring the waterproof performance of the device.

[0050] The fish outlet is inclined, and the top end is fixedly connected with the opening at one end of the fish passage (slide). The connection part is made by integral injection molding process, which has good sealing performance and stable structure. At the same time, the top opening of the fish outlet has the same length and width as the upper opening of the fish passage (slide), and the width of the end opening is shortened by about 1 / 2. This design can make the water flow and fry concentrate and flow out, reduce the dispersion phenomenon, and also can shield the external light to a certain extent, avoiding the interference to the illumination environment of the counting area.

[0051] The counting processing device includes a computer host configured with RTX4060, a display screen and a camera. The computer host is in communication with the display screen, the camera and the light supplement lamp respectively, and can count the fry through the preset counting program. The display screen is inlaidly installed outside the fish passage (slide) and is integrated with the device shell, which is not only beautiful but also saves space. A waterproof sealing ring is arranged between the edge of the display screen and the device shell to prevent water vapor from entering. The camera is installed at the central position of the top of the fish passage (slide), and the lens is made of high-definition optical glass, which has anti-fouling and waterproof functions, and can shoot the entire bottom of the fish passage (slide), ensuring that there is no counting dead angle.

[0052] As shown in Figure 2 and Figure 4 , the display screen is a 11.6-inch 1080P touch display screen, which has clear display effect and sensitive touch response, and is used for display and counting result display of the counting program. The brightness of the display screen can be automatically adjusted according to the environmental light, and it can also be clearly visible in strong light environment. The display screen can be stored in the display screen slot on the fish passage (slide), and the display screen slot is provided with a display screen cover plate, which is designed by magnetic attraction type, and is convenient to open and close, and is used for protecting the display screen from dust and collision damage.

[0053] The camera is a USB high-definition wide-angle camera, which realizes the shooting of the whole range of the fish passage (slide) with 125° distortion-free wide angle and 2.8mm focal length, and has a frame rate of up to 30 frames per second, can transmit the fry passing through the picture in real time high definition, and upload the photographed fry image to the counting program for subsequent counting, for algorithm to recognize the fry shape characteristics and quantity. The angle of the camera can be calibrated through the internal fine adjustment structure to ensure that the shooting range accurately covers the counting area.

[0054] Because the fry counting has high real-time requirements, the working configuration of the algorithm processing unit also has high requirements, therefore, the computer host configured with RTX4060 is used for counting according to the running requirements of the software program, which has powerful graphic processing capability and data operation capability, and can quickly process the image data transmitted by the camera. In this embodiment, the improved counting algorithm is used, the code of the program is adjusted to a certain lightweight, the speed and accuracy of image recognition are optimized, the time consumption is shorter when the fry counting software application program is opened, and the occupation of system resources is reduced. The computer host has a separate storage location, which is provided with a heat dissipation hole and a dust screen to ensure that the host can stably operate in a suitable environment.

[0055] The mobile storage device includes a support and universal wheels, as shown in Figure 2 The support is made of light and high-strength aluminum alloy material, which is light in weight and strong in bearing capacity, and is used for supporting the fish passage (slide) and other equipment parts. The surface of the support is treated to prevent rust, thereby prolonging the service life. The universal wheels are installed at the bottom of the support, and are made of high-elasticity rubber material, which has good shock absorption effect. In this embodiment, the universal wheels are installed at the two corners in front of the flow water fry counting equipment to facilitate the movement of the equipment, and the brake universal wheels are installed at the two corners at the back, the brake device is sensitive and reliable, which facilitates the fixation of the equipment at any time during the movement, and ensures the stability of the equipment during the counting work.

[0056] A wiring box is arranged inside the equipment, the wiring box is made of corrosion-resistant PVC material, the internal lines are arranged in order, and a partition plate is arranged between the lines to avoid mutual interference. The interfaces of the wiring box are all waterproof joints, which effectively prevent water. The computer host is connected with the display screen, the camera and the fill light through the wiring box, so as to ensure the stable and reliable signal transmission between the components. The whole machine uses external power supply, the power cord is made of thickened waterproof cable, and a waterproof protective cover is arranged at the plug, thereby improving the safety of the equipment in use.

[0057] Embodiment two

[0058] This embodiment relates to the use method of the high-precision flow water fry counting equipment based on machine vision in embodiment 1, and the use method comprises the following steps, Figure 1 The specific flow chart specifically comprises the following steps:

[0059] Step 1: Connect the device to an external power source to ensure that the lighting, camera, display, and computer host with RTX 4060 are powered on and functioning properly. Connect the water supply pipe to the external water faucet at one end and the device's water supply pipe interface at the other end. Turn on the water faucet and adjust the water flow to the appropriate level. The water will flow through the horizontal water storage section to create a stable water flow into the fish mouth, creating a smooth water environment for the fry to slide down. At the same time, check the sealing status of the internal wiring box and the waterproof coating of the slide to ensure reliable waterproof performance.

[0060] Step 2: Start the computer host and display, run the counting program to test the camera's shooting picture, and observe whether the picture is clear and the shooting range is complete covering the entire fish passage (slide) counting area. At the same time, check whether the water flow speed is moderate and can support the fry to pass through the slide smoothly. If the device is not running well, adjust the light level of the lighting to optimize the shooting light, or adjust the water faucet valve to change the water flow speed to ensure that the fry is clearly outlined in the picture and can smoothly pass through the counting area.

[0061] Step 3: Select ten fry of the same species for testing and slowly pour them into the fish inlet. Observe the flow state of the fry in the fish passage (slide) and check whether there are problems such as sticking, accumulation, or sliding too fast. If the above situations exist, further adjust the water flow speed to use the water flow thrust to make the fry evenly distributed and orderly flow in the slide made of frosted plastic material, ensuring that the camera can clearly capture the image of individual fry to provide stable conditions for formal counting.

[0062] Step 4: Open the counting program on the display and select the fry species to be counted from the fish database. Pour the fry to be counted into the fish inlet in batches and observe whether the fry can smoothly enter the counting area of the fish passage (slide). Take advantage of the frosted plastic surface characteristics to reduce fish sticking, and check whether there are fish jumping out or staying. If the fry cannot be completely captured by the camera, adjust the installation height and angle of the camera to ensure that all fry passing through the slide can be included in the shooting range.

[0063] Step 5: Select the online counting function, the system automatically calls the camera to obtain the fry image in the fish passage (slide) in real time, and the computer host with RTX 4060 runs the counting algorithm for real-time analysis and counting. The counting results are displayed on the display in real time. Continue counting until all fry pass through the counting area, completing this counting work.

[0064] Step 6: After the counting work is completed, turn off the counting program on the display, turn off the power of the computer host, display, camera, and light supplement lamp, and disconnect the external power supply. Turn off the water faucet and remove the water pipeline from the interface and water faucet. Clean the fish inlet and fish passage (slide) to remove residual water stains and impurities. Check the integrity of the internal wiring box and each sealed part to ensure the waterproof performance for the next use.

[0065] In step 5, after counting is completed, the system will automatically save the counting data (including total quantity, counting duration, fish species information, etc.) to the storage unit of the computer host for subsequent analysis and recording. At this time, the user can view the detailed counting results through the control interface of the display to confirm whether the fry quantity meets the expectations.

[0066] Example Three

[0067] The fry counting device integrates a water flow auxiliary device, a fry conveying device, a visual counting interaction device, and a mobile support device. Each module cooperates to meet the requirements of multi-fish species counting, low-damage conveying, and flexible deployment. The water flow auxiliary device is composed of water inlet plastic pipes (1, 3, 21, 27, 34). After connecting to the water source, it precisely controls the flow rate and flow volume, adapts to the characteristics of fish species, and creates a stable flowing environment for fry, avoiding counting deviation and fish body damage. The fry conveying device includes a fish inlet funnel (2, 28, 35), a slide (5, 23), and a fish outlet (24). The fish inlet funnel is made of food-grade plastic with a smooth inner wall. The slide has adjustable slope and width to simulate natural flowing water. The fish outlet is inclined to accelerate the discharge of fry, ensuring the continuity of conveying and low damage. The visual counting interaction device takes the display (4, 22, 36) and computer host case (7, 26, 33) as the core. The host has built-in multi-fish species recognition algorithms and models. It collects images through the camera and intelligently analyzes and counts. The top light supplement ensures clear images, and the results are displayed on the display in real time. The mobile support device uses lightweight high-strength brackets with rubber universal wheels (6, 25, 32). The bracket module design ensures stability, and the detachable metal plates on four sides facilitate maintenance. The universal wheels support the flexible movement and site adaptation of the device.

[0068] When the device is running, fry is thrown into the fish inlet funnel, the water flow auxiliary device pushes it to flow along the slide, the visual counting interaction device synchronously collects images, the computer host runs algorithms for accurate counting and feedback of results. Fry is discharged through the fish outlet to complete the process, and the mobile support device helps the device to be flexibly transferred and fixed in breeding workshops, release sites, etc. This scheme breaks through the limitations of traditional devices through hardware modularization and algorithm fusion, realizes "high-efficiency counting + low-damage conveying + flexible deployment", and adapts to the statistical needs of fry in multiple scenarios.

[0069] Each device cooperates to ensure equipment function: water flow auxiliary device stabilizes flow, fry conveying device guides fish with low loss, visual counting interactive device accurately identifies and counts, mobile support device is flexibly deployed, and an integrated multi-fry counting scheme is constructed to provide technical support for aquaculture fry quantity statistics and help the development of industry digitization. In a further technical scheme, the water flow auxiliary device further comprises a water conveying pipeline, which is a 20mm diameter rubber hose. One end can be directly connected with an external faucet, and the other end is connected with the water inlet (1, 3, 21, 27, 34) of the equipment. The top water pipe is provided with a special water outlet design, and the pipeline end is distributed with dozens of small holes with a diameter of about 2mm. When the water flow flows from the external faucet, it will form a uniform waterfall through these small holes, slowly pouring into the fish funnel (2, 28, 35). This design can not only ensure the continuous stability of the water flow, but also avoid the impact on the fry caused by too large water flow. At the same time, the slight fluctuation of the water flow in the fish funnel can also help the fry smoothly enter the subsequent slide (5, 23), effectively reducing the retention of the fry in the fish funnel. To adapt to different scenes and different sizes and types of fry, the valve of the external faucet can be adjusted to control the water flow rate, so as to flexibly adjust the pushing force of the water flow on the fry according to the actual needs, solve the problem of fry adhesion to the equipment caused by the mucus on the surface of the fish, and ensure the smooth flow of the fry in the equipment.

[0070] In a further technical scheme, the fish funnel (2, 28, 35) and the slide (5, 23) in the fry conveying device are made of frosted plastic material. The surface of this material has moderate friction, which can avoid the fish from sliding too fast due to the too smooth surface, and reduce the adhesion of the fish to the surface of the equipment. The angle of the slide (5, 23) is fixed and cannot be replaced. Its inclination angle is optimized through multiple tests and is set to the angle most suitable for the natural flow of most common fry, ensuring that the fry can move at a stable speed in the slide to provide a clear shooting picture for the visual counting interactive device. The angle of the fish funnel (2, 28, 35) is fixed and does not need to be adjusted. Its structure design perfectly connects with the slide (5, 23). After the fry enters the slide from the fish funnel, it can flow smoothly along the preset path without affecting the counting.

[0071] In a further technical solution, a fish inlet cover plate is arranged above the chute (5, 23), which is made of light plastic material and connected to the main body of the device through a hinge. When the cover plate is opened, the connection between the fish inlet funnel (2, 28, 35) and the chute (5, 23) can be easily cleaned and inspected. When the cover plate is closed, it can effectively block dust and debris from the outside from entering the chute (5, 23), preventing counting errors caused by foreign matter interference, and also reducing the influence of external light on the internal lighting system to some extent, ensuring the stability of the shooting environment. The bottom of the chute (5, 23) is not provided with any groove, but with a smooth frosted plastic surface. This design not only facilitates cleaning and prevents fry feces and impurities from accumulating in the groove, but also ensures that the fry moves evenly during sliding and does not change its trajectory due to the presence of the groove, further improving the accuracy of counting.

[0072] In a further technical solution, the light supplement lamp in the visual counting interactive device is installed under the top cover plate of the chute (5, 23), which is a plurality of longitudinally arranged light strips. The brightness can be adjusted through the interactive interface on the display (4, 22, 36). The chute (5, 23) is the core counting area, and the overall design of the device is semi-closed to reduce the interference of natural light. The light supplement lamp illuminates the fry from the top down, and the light is diffusely reflected after passing through the frosted plastic surface of the chute, which can evenly illuminate the fry and highlight its morphological features, making it easy for the camera to take clear pictures. By adjusting the brightness of the light supplement lamp, it can be suitable for fry of different body colors, avoiding overexposure of fry images due to too strong light or blurred images due to too weak light, ensuring that the camera can obtain high-quality fry image information and provide a reliable data basis for subsequent algorithm recognition and counting.

[0073] In a further technical solution, the display (4, 22, 36) is inlaid on the outside of the device main body and integrated with the device shell without a separate support. The display uses an 11.6-inch 1080P touch display screen, and the screen angle is optimized to meet the ergonomic principle, making it easy for users to clearly view the counting results and perform interactive operations when operating the device. The display (4, 22, 36) is connected to the computer host (7, 26, 33) through the internal wiring box, which is a sealed metal pipe that can effectively protect the wiring from water vapor and dust erosion, ensuring stable signal transmission. The display can display real-time counting quantity, cumulative counting quantity, device running status and other information, and users can also select different fish counting modes through touch operation to call corresponding recognition algorithms.

[0074] In a further technical solution, the camera is installed below the display (4, 22, 36) and is a USB high-definition wide-angle camera with a 125° distortion-free wide-angle and a 2.8mm focal length, which can completely capture the counting area of the entire slide (5, 23) and ensure that no fish fry is missed. The camera is also connected to the computer host (7, 26, 33) through the internal wiring box, and the real-time image captured by the camera is transmitted to the computer host, which is processed by the computer vision algorithm in the host. The algorithm can identify the morphological characteristics of different fish species, accurately count the fish fry, and feed the counting results to the display (4, 22, 36) in real time. The entire process responds quickly and meets the needs of large-scale fish fry counting.

[0075] In a further technical solution, the universal wheels (6, 25, 32) in the mobile support device are made of rubber and have anti-shake and wear-resistant properties. Some of the universal wheels are brakeable. The front two corners of the device are equipped with ordinary universal wheels, and the rear two corners are equipped with brakeable universal wheels. When the device needs to be moved, the brake can be released to easily push it. When the device reaches the designated location for counting, the brake can be pressed to fix the device, preventing it from moving due to vibration or water flow during work, ensuring the stability of the counting.

[0076] In a further technical solution, the computer host (7, 26, 33) has a separate storage location, usually set in the independent space below or beside the device body. This space is designed to be sealed and isolated from other areas of the device to protect the computer host from water vapor. The connection lines between the computer host and the display (4, 22, 36), camera, and light supplement lamp are arranged through the internal wiring box, and the lines in the wiring box are arranged neatly for easy maintenance and repair. The entire device uses external power supply, connected to a 220V mains socket through a power cord. The power cord is drawn out of the hole (31) reserved on the device, and a waterproof sealing ring is provided at the hole to prevent water vapor from entering the device. This power supply method does not require a portable power supply, reducing the weight and cost of the device, and ensuring stable operation for a long time. It is suitable for scenarios such as aquaculture workshops and laboratories where there is a power supply.

[0077] In a further technical solution, the four metal plates of the device can be detached, and the metal plates are connected to the device body by screws. After being detached, the internal parts of the device can be conveniently adjusted, repaired and replaced, such as cleaning the slide (5, 23), adjusting the camera angle, replacing the light supplement lamp, etc. The inner side of the metal plate is pasted with heat insulation and sound insulation materials, which can reduce the influence of the external environment on the internal temperature and noise of the device, and provide a stable working environment for electronic components such as computer host (7, 26, 33). At the same time, the detachable metal plate is also convenient for transportation and storage of the device. When the device is not in use, the metal plate can be detached to reduce the volume of the device and save storage space.

[0078] The application also provides a use method of the above-mentioned computer vision-based lightweight multi-fish fry counting device, which comprises the following contents:

[0079] Step 1: Connect the device to an external power supply to ensure that the computer host, display, camera and light supplement lamp are powered on normally; connect one end of the water pipeline to an external water faucet and the other end to the water inlet plastic pipe of the device, open the water faucet and adjust it to the appropriate water flow, so that the water flows into the fish funnel in the form of a waterfall through the small holes of the top water pipe, creating a stable water environment for the fry to slide down, and at the same time checking the sealing performance of the internal wiring box of the device to ensure reliable waterproof performance.

[0080] Step 2: Start the computer host and display, run the counting system to test the camera shooting picture, observe whether the picture is clear and the shooting range is complete and covers the counting area of the slide, and at the same time check whether the water flow speed is moderate and whether it can support the fry to smoothly pass through the slide. If the device does not work well, the water flow speed can be changed by adjusting the water faucet valve, or the light supplement lamp light can be adjusted to optimize the shooting light, so that the fry in the picture is clear and identifiable, and can smoothly pass through the slide into the counting area.

[0081] Step 3: Select dozens of fry of the same species for testing, pour them into the fish funnel, observe the flow state of the fry in the slide and the camera capturing effect, and if there are problems such as fry adhesion and accumulation, the water flow speed can be further adjusted to ensure that the current test fry can be evenly distributed and smoothly flow in the slide, laying a foundation for subsequent formal counting.

[0082] Step 4: Open the counting program on the display, select the fish species that need to be counted from the multi-fish species identification model; slowly pour the fry to be counted into the fish funnel, observe whether the fry can smoothly enter the counting area of the slide, check whether there are problems such as fry adhesion to the inner wall of the fish funnel or the slide, whether there are fry jumping out of the counting area, etc. If it is found that the fry cannot be clearly captured by the camera, the installation angle of the camera can be adjusted to ensure that all fry passing through the slide can be completely shot.

[0083] Step 5: Select the online counting function, the system automatically calls the camera to obtain the image of the fry in the slide in real time, the computer host runs the counting algorithm for real-time counting, and the counting result is displayed on the display in real time. During the counting process, the user can view the counting progress and cumulative quantity in real time through the display until all the fry are counted. After counting is completed, the system will automatically save the counting data and store it to the specified path of the computer host for subsequent analysis and record. At this time, the user can view the detailed counting results through the control interface of the display, including the total number, counting time, etc. information, to confirm whether the fry quantity meets the expectation.

[0084] Step 6: After the counting work is completed, turn off the counting program on the display, turn off the power of the computer host, display, camera, and light supplement lamp, etc. in turn, disconnect the external power supply; turn off the faucet and remove the water supply pipeline from the water inlet and faucet; clean the fish inlet funnel and slide to ensure that there is no fry residue and impurities accumulation inside the equipment; check the internal components of the equipment through the detachable four metal plates, and reinstall the metal plates after confirming that there is no error, complete the storage and arrangement of the equipment.

[0085] Unlike traditional counting methods that rely on detailed survey of the breeding environment and complex installation of equipment, the present application can accurately complete the counting by capturing the image of the fry in the flowing water through the camera, without the need for complex mechanical adjustment structure, greatly simplifying the operation process. Compared with other counting techniques based on sensors, the present application reduces the physical contact and potential damage to the fry through water flow assistance and frosted plastic slide design, and cooperates with the smooth channel structure without grooves to effectively improve the survival rate during the counting process of the fry, and is more suitable for scenes with higher requirements for fry integrity and survival rate in aquaculture.

Claims

1. A lightweight multi-species fish fry counting device based on computer vision, characterized in that, The equipment includes a water flow assist device, a fish fry conveying device, a visual counting interaction device, and a mobile support device; The water flow assist device includes a water pipe (1) and a water pipe (3) for conveying water to promote the flow of fish fry; The fish fry conveying device includes a fish inlet funnel (2), a slide and a fish outlet (5). The fish inlet funnel (2) is used to feed fish fry. The slide and the fish outlet (5) are made of plastic. The fish fry flow out from the fish outlet (5) through the slide. The visual counting interaction device includes a display (4) and a computer host (7). The display (4) is connected to the computer host (7). The computer host (7) runs a computer vision fish fry counting algorithm to count fish fry and interact with the user. The display (4) is used to display the counting result information. The mobile support device includes a bracket and casters (6). The bracket is used to support the main body of the equipment, and the casters (6) are made of rubber and have anti-shaking and wear-resistant properties, which facilitates the movement of the equipment. When the equipment is working, the fish fry enter through the fish inlet funnel (2), and the water pipes (1) and (3) transport water to push the fish fry to flow in the equipment. After passing through the relevant path, they flow out from the fish outlet (5). During the flow, the computer host (7) obtains the image information of the fish fry and counts it by running an algorithm and using a suitable image acquisition method combined with the image acquisition component adapted to the equipment, namely the camera. The counting result is displayed on the monitor (4). The caster wheel (6) assists the equipment to move flexibly and adjust its position.

2. The lightweight multi-species fish fry counting device based on computer vision according to claim 1, characterized in that, The water pipes (1) and (3) of the water flow auxiliary device adopt a dual-path independent control design. Each water pipe is equipped with a precision flow regulating valve to adjust the speed and flow rate of the two water flows respectively. It can flexibly adjust the water flow driving force according to the size and swimming characteristics of different fish species and fry, avoid the problem of fry accumulation or impact damage caused by single water flow control, and significantly improve the stability and adaptability of fry flow.

3. The lightweight multi-species fish fry counting device based on computer vision according to claim 1, characterized in that, The inner wall of the fish inlet funnel (2) of the fish fry conveying device is made of frosted plastic, which has a high surface friction coefficient. This not only reduces the speed of the fish fry entering and prevents the fish fry from being missed due to excessive flow, but also has good water resistance and wear resistance, which can maintain the anti-sticking effect for a long time and avoid chemical damage to the fish fry.

4. A lightweight multi-species fish fry counting device based on computer vision according to claim 1, characterized in that, The slide of the fish fry conveying device adopts an integrated design. The slide body and the equipment frame are connected by screw structure. Users can quickly replace slide modules of different widths and slopes according to the size differences of different fish species and fry without the need for overall equipment modification. This greatly improves the adaptability of the equipment to counting multiple fish species. Moreover, the replacement process is convenient and efficient and can be operated by a single person.

5. A lightweight multi-species fish fry counting device based on computer vision according to claim 1, characterized in that, The computer host (7) of the visual counting interaction device has a built-in multi-fish species recognition model. This model is trained by a large number of images of different fish species and fry, and includes the characteristic parameters of a variety of common farmed fish fry. Users can directly select the corresponding fish species through the interactive interface of the display (4), and the computer host (7) can automatically call the matching recognition algorithm without manually adjusting the parameters, resulting in a high counting accuracy.

6. A lightweight multi-species fish fry counting device based on computer vision according to claim 1, characterized in that, The visual counting interactive device is equipped with a high-definition camera acquisition system. The high-definition camera is installed above the slide. The camera captures a top-down view of the fish fry for counting, which effectively solves the counting error caused by the low frame rate and slow transmission speed of the camera, and further improves the accuracy of counting multiple fish species.

7. A lightweight multi-species fish fry counting device based on computer vision according to claim 1, characterized in that, The bracket of the mobile support device is made of lightweight aluminum metal in one piece, which greatly reduces the weight compared with traditional metal brackets. At the same time, it has higher structural strength and corrosion resistance. While ensuring the lightweight of the equipment, it can effectively resist the water vapor erosion in the aquaculture environment and extend the service life of the equipment. The bottom of the bracket is equipped with adjustable support feet, which can be used with casters (6) to be placed stably on uneven ground.

8. A lightweight multi-species fish fry counting device based on computer vision according to claim 1, characterized in that, The caster wheel (6) of the mobile support device has a built-in shock absorption and buffer mechanism, which consists of a high elastic rubber pad and a damping spring. During the movement of the equipment, it can effectively absorb the vibration caused by ground bumps, avoid the vibration causing the fish fry to deviate from the track in the slide and affect the counting, and at the same time reduce the loss of electronic components inside the equipment caused by vibration, and improve the stability of the equipment operation.

9. A lightweight multi-species fish fry counting device based on computer vision according to claim 1, characterized in that, The equipment adopts a lightweight design, with the main structure made of high-strength aluminum alloy and high-strength engineering plastic composite material, which significantly reduces the overall weight while ensuring structural stability. The overall volume of the equipment has been optimized, and the functional modules are compactly integrated. The fish passage, counting unit and support structure form an integrated layout, reducing redundant space occupation. Through the dual optimization of lightweight materials and miniaturized structure, the equipment is easy to transport and operate outdoors, significantly improving the flexibility of the usage scenario and fully reflecting the lightweight characteristics.

10. A method for using a lightweight multi-species fish fry counting device based on computer vision, characterized in that, The method includes the following steps: Step 1: Open the power box of the equipment, connect the power of the computer host (7), monitor (4) and camera, and connect the water pipes (1) and 3 to the external water source. Open the valve of the water flow auxiliary device to allow the water to flow slowly into the equipment, create a suitable water environment for the fish fry to move, and ensure that the water flows smoothly in the slide without obvious turbulence. Step 2: Start the computer host (7) and monitor (4), run the visual counting system, test whether the camera's shooting image is clear, whether the shooting range completely covers the counting area of ​​the slide, and observe whether the water flow speed is appropriate and can support the fish fry to pass through the slide smoothly. If the equipment operation effect is not ideal, change the water flow speed by adjusting the flow regulating valve of the water pipe (1) and (3), or adjust the installation position and angle of the camera to optimize the shooting effect and ensure that the fish fry are clearly distinguishable in the picture. Step 3: Based on the species and size of the fish fry to be counted, start the counting algorithm, then clear any foreign objects from the fish inlet and slide to ensure that the fish fry can slide smoothly into the slide and avoid getting stuck or piling up. Step 4: Open the counting program in the interactive interface of the display (4), select the corresponding fish species from the multi-fish species recognition model, and then pour an appropriate amount of fish fry into the fish funnel (2). Observe whether the fish fry can smoothly enter the slide and pass through the counting area. Check whether there are any fish fry stuck together, jumping out or not being captured by the camera. If there are any problems, adjust the water flow speed appropriately or clean the scratches on the inner wall of the slide. If necessary, recalibrate the shooting range of the camera. Step 5: Select the online counting function. The system will automatically call the camera to obtain the image of the fish fry in the slide in real time. The computer host (7) will run the counting algorithm to count in real time. The counting result will be displayed on the monitor (4) in real time. Continue to pour in fish fry until all the fish fry to be counted have passed through the counting area. The system will automatically accumulate the total number of counts. Step 6: After counting is complete, close the counting program, turn off the power of the monitor (4), computer host (7) and camera in sequence, turn off the valve of the water flow auxiliary device, disconnect the water pipes (1) and (3) from the external water source, drain the residual water, if you need to move the equipment, use the casters (6) to push the equipment to the storage position, put down the support feet at the bottom of the bracket to fix the equipment; organize and store the disassembled parts and accessories, and ensure that all parts of the equipment are well preserved.

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