High-precision running water fish fry counting equipment based on machine vision and use method of high-precision running water fish fry counting equipment

Abstract

The invention discloses high-precision running water fry counting equipment based on machine vision and a use method thereof, and belongs to the technical field of machine vision and machinery. The running water fish fry counting equipment comprises a water flow conveying device, a fish fry shunting device, a counting processing device and a mobile storage device, the fish fry diversion device comprises a fish inlet, a fish diversion baffle, a fish passing channel and a fish outlet; an inclination angle adjusting device is mounted between the fish inlet and the fish passing channel; the fish passing baffle is arranged at the downstream of the fish inlet in the fish passing channel and comprises a cylinder arrangement groove plate and a fish separation column; the fish separating column is an acrylic column body sleeved with silica gel on the outer side. The bottom of the fish passing channel is a transparent acrylic plate and is provided with a stripe-shaped notch; the mobile storage device further comprises a lifting rod, and the lifting rod can adjust the inclination angle of the fish passing channel. According to the invention, a multi-angle adjustable design is provided for different fish types and environments; and the problem of adhesion between the fish fries and the channel is solved by combining stripe-shaped notches at the bottom of the fish passing channel.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fry quantity statistics such as proliferation release, aquaculture and fry sales, and in particular to the field of fry counting based on flowing water, belonging to the technical fields of machine vision and machinery. BACKGROUND

[0002] China is the world's largest producer and consumer of aquatic products, and aquaculture plays an important role in the national economy. Accurate aquaculture counting is a key factor in promoting the development of this industry. Through fry counting, breeders can scientifically plan the breeding density, ensure the reasonable quantity of fry, maximize the utilization efficiency of water body, and avoid the problems of competition, oxygen deficiency and disease transmission caused by high density. This not only improves the breeding efficiency, but also helps breeders better grasp the survival rate and growth status of fry, and timely adjust the amount of feed and water quality management measures to improve the overall breeding benefit. At the same time, breeding counting is crucial for the accounting of economic benefits of breeding, helping breeders to scientifically evaluate the quantity and survival rate of fry, and to make reasonable cost accounting and income estimation, to avoid economic losses caused by inaccurate quantity, and to ensure the maximization of economic benefits in the breeding process. Therefore, efficient and high-precision aquatic product counting methods and equipment are crucial to the current aquaculture industry.

[0003] Traditional fry counting methods for aquaculture mainly rely on manual operation and simple tools such as nets and containers. This method has many defects, affecting the efficiency and accuracy of breeding.

[0004] The main defects of manual fry counting are as follows: 1. The accuracy of manual fry counting is low, and breeders are easily affected by factors such as fatigue and distraction, leading to repeated counting or missing fry, resulting in large human errors. This not only affects the reliability of statistical data, but also may lead to mistakes in subsequent management decisions. 2. The efficiency of manual fry counting is low. In large-scale breeding farms, the quantity of fry usually reaches hundreds of thousands or even levels, and relying on manual counting is time-consuming and labor-intensive. Even experienced workers, when faced with a large number of fry, it is difficult to ensure that the counting task is completed quickly and accurately. This inefficient way of working not only increases labor costs and may delay the progress of other breeding processes, but also cannot provide continuous and real-time data support, posing challenges to the monitoring and management of breeding. 3. In large-scale, high-density fry breeding bases, traditional fry counting methods require the fry to be lifted out and placed in smaller containers for counting, which not only increases the density of the fry, causing space shortage, but also may cause the fry to lack oxygen and stress in the high-density environment, affecting the survival rate of the fry. SUMMARY

[0005] In order to solve the problems of low efficiency, high cost and difficult management in the prior art, the application provides an integrated device and a corresponding control system for counting the number of fry in running water.

[0006] In order to achieve the above-mentioned application purposes, the application adopts the following technical solutions:

[0007] A high-precision fry counting device based on machine vision, the fry counting device comprises a water flow conveying device, a fry shunting device, a counting processing device and a mobile storage device.

[0008] The water flow conveying device comprises a water pipeline interface 110, a horizontal water storage section 111 and a water outlet; the water pipeline interface 110 is arranged outside the horizontal water storage section 111, and the water outlet is arranged at the bottom of the other side of the horizontal water storage section 111.

[0009] The fry shunting device comprises a fish inlet 1, a fish shunting baffle 12, a fish passing channel 14 and a fish outlet 6; the fish passing channel 14 is arranged obliquely, the fish inlet 1 and the fish outlet 6 are arranged at the top end and the low end of the fish passing channel 14 respectively, and the fish shunting baffle 12 is arranged inside the fish passing channel 14; the bottom of the fish inlet 1 is in an inclined state, the bottom end thereof is rotatably connected to one end of the fish passing channel 14, three other edges thereof are provided with baffles, and the baffle at the top thereof is provided with the horizontal water storage section 111; an inclined angle adjusting device 2 is arranged between the fish inlet 1 and the fish passing channel 14.

[0010] The fish shunting baffle 12 is arranged downstream of the fish inlet 1 in the fish passing channel 14 and comprises a column arrangement groove plate 414 and a fish shunting column 415; a row or multiple rows of grooves are regularly arranged on the column arrangement groove plate 414, one end of the multiple fish shunting columns 415 is clamped in the grooves, and the fish shunting columns 415 are vertically fixed on the same side of the column arrangement groove plate 414; in use, the column arrangement groove plate 414 is horizontally arranged at the bottom of the fish passing channel 14, so that the other end of the fish shunting column 415 is placed at the bottom of the fish passing channel 14.

[0011] The fish passing channel 14 is mainly a rectangular channel, a light supplementing lamp 7 is arranged at the bottom of the fish passing channel 14, and the counting processing device is arranged at the top of the fish passing channel 14.

[0012] The fish outlet 6 is arranged obliquely, and the top end thereof is fixedly connected to the opening of one end of the fish passing channel 14.

[0013] The counting processing device includes a development board, a display screen 412 and a camera 5. The development board is in communication with the display screen 412, the camera 5 and the light supplement lamp 7 respectively, and can count the fry through a preset counting program. The display screen 412 is fixedly installed outside the fish passage 14, and the camera 5 is installed at the top of the fish passage 14 and can shoot the entire bottom of the fish passage 14.

[0014] The mobile storage device includes a support and universal wheels 9. The support is used for supporting the fish passage 14, and the universal wheels 9 are installed at the bottom of the support.

[0015] In a further technical solution, the water flow conveying device further includes a variable frequency water pump and a water conveying pipeline. The variable frequency water pump is a 9000DC variable frequency water pump, and the water conveying pipeline includes a rubber hose with a diameter of 20 mm and can be connected to an iron water conveying pipeline interface 110 with a diameter of 20 mm. The horizontal water storage section 111 is provided with a special water outlet design. For the incoming water flow, a hollow design is provided, that is, the water flow is stored in the horizontal water storage section and flows out from the water outlet dug below. In order to conveniently adapt to different scenes and the size of fry, the variable frequency water pump adopts a type that can control the size of the water flow, so as to conveniently control the flow rate according to actual needs and solve the problem of adhesion of fish body surface mucus to the equipment.

[0016] In a further technical solution, the inclination angle adjusting device 2 includes support rods 213, slide rails 211, threaded sliding blocks and adjustable screws 210. Two slide rails 211 are horizontally fixedly installed on the two sides of the fish passage 14 respectively, and two threaded sliding blocks are matched with the two slide rails 211 respectively, so that the threaded sliding blocks can slide back and forth on the corresponding slide rails 211. One end of each of the two support rods 213 is hingedly connected to the baffle on the two sides of the fish inlet 1, and the other end of each of the two support rods 213 is hingedly connected to the two threaded sliding blocks through the two adjustable screws 210. When the threaded sliding blocks slide back and forth on the slide rails 211, the adjustable screws 210 are driven to move horizontally back and forth, so that the support rods 213 drive the fish inlet to rotate, thereby achieving the purpose of adjusting the inclination angle of the fish inlet. After the adjustable screws 210 are tightened, the threaded sliding blocks can be fixed on the slide rails 211, so that the support rods 213 and the fish inlet 1 are fixed at the positions at this time, and the inclination angle of the fish inlet 1 is fixed. In this way, the fish inlet 1 is designed in a stretchable working mode, and when the work is completed, the fish inlet 1 is folded up, so that the whole water flow breeding and counting device is in the shape of a cuboid, thereby facilitating transportation. In a further technical solution, the support rod 213 is connected to the fish inlet 1 through a fixed hinge screw 212.

[0017] In a further technical solution, the inclination angle of the fish inlet 1 can be 30-90°. When counting the fry, the fish inlet 1 is pulled down by the inclination angle adjusting device 2 to form a 30-90° slide, and the angle of the fry sliding down can be flexibly adjusted according to the slope of the fish inlet plate to control the falling speed. When the inclination angle is the maximum angle of 90°, the fish inlet plate and the fish passage are in a closed state, and when the inclination angle is the minimum angle of 30°, it is the lowest angle at which the fry can be placed.

[0018] In a further technical solution, the fish inlet 1 is provided with a stretching handle to facilitate adjustment of the angle of the fish inlet 1.

[0019] In a further technical solution, the fish inlet cover plate 3 is arranged above the fish passage 14. When the fish inlet cover plate 3 is opened, the adjustable screw 210 can be tightened or loosened when the fish inlet is inclined at an angle close to 90°, facilitating adjustment of the inclination angle of the fish inlet 1. When the fish inlet cover plate 3 is closed, counting errors caused by foreign matter entering the fish passage 14 can be avoided.

[0020] In a further technical solution, the grooves on the column arrangement groove plate 414 are circular grooves with a radius of 1 cm, each groove is spaced apart by 3 cm, and three rows are arranged, each row is spaced apart by 4 cm; the fish separating column 415 is a cylindrical column with a diameter of 1 cm, and the outer side of the column is provided with silica gel. The fish separating column 414 is clamped in the groove, so that the fry can pass between the columns, realizing the shunting of the fry, and the silica gel outside the fish separating column 414 can prevent damage to the fish body, solving the problem of a large number of fry entering the fish counter passage and overlapping and shielding each other.

[0021] In a further technical solution, the column arrangement groove plate 414 is movable, and the distance between the column arrangement groove plate 414 and the fish inlet 1 is adjustable, and the fish separating column 415 is detachably installed, so that the discharge mode and distance of the column can be customized according to the size of the fish body, thereby setting an efficient arrangement mode and avoiding that large fry cannot pass. In addition, the arrangement area of the column can be moved forward and backward to adjust the distance from the fish inlet.

[0022] In a further technical solution, the bottom plate of the fish passage 14 is made of acrylic material, which facilitates the upward light supplementing of the light supplementing lamp 7 below the fish passage 14 to avoid shielding of the light source.

[0023] In a further technical solution, the brightness of the light supplement lamp 7 can be adjusted. The fish passage 14 is the core area of the fry counting device and serves as the main counting area. To avoid interference from natural light, the fry counting device is a dark box device, and a light supplement lamp is placed from bottom to top in the fry counting passage, thereby achieving backlight effect with the fry and highlighting the black shape of the fry, facilitating the camera to capture and record the shape features of the fry. The light supplement lamp can adjust the light supplement intensity, so that the user can adjust the brightness according to different situations to avoid camera blur caused by exposure. Supplementing the light source from bottom to top can to some extent avoid the problem of unclear fry image caused by water surface reflection when supplementing light from top to bottom or from the side, which helps the camera to obtain high-quality fry image.

[0024] In a further technical solution, the bottom of the fish passage 14 is provided with a stripe-shaped notch 411 with a spacing of 2-4 cm. Considering the adhesion problem between the fish body surface mucus and the device, especially for flat fish such as Cynoglossus semilaevis, the contact area between the fish body and the passage is too large, which makes it difficult to slide. The fish passage 14 is provided with a stripe-shaped notch 411 with a spacing of 2-4 cm at the bottom, which reduces the contact area between the fish body and the device and thus reduces the adhesion between the fish body and the passage, avoiding the long stay of fry in the passage.

[0025] In a further technical solution, the top opening of the fish outlet 6 is consistent in length and width with the upper opening of the fish passage 14, and the width of the end opening is shortened by about 1 / 2. The fish outlet is located at the end of the overall device, where the counted fry and the water flow transmitted by the water pump pass through. The entire fish passage 14 box body is rectangular in structure, to avoid the dispersion of water flow and fry when they flow out, the design is consistent in length and width with the fish passage 14 box body at the front end, and the terminal diameter is about 1 / 2 the size of the front end, which ensures that the water flow and fry can be concentrated to flow out. In addition, this design of fish outlet 6 can effectively block external light sources and viewing angles, avoiding the problem of decreased fry counting accuracy caused by external objects entering the camera area and external light sources affecting the effect of the light supplement lamp inside the box.

[0026] In a further technical solution, the display screen 412 is installed above the fish passage 14 through a display screen support 4, which can be adjusted in all directions 360°, facilitating the user to adjust the display screen to the best viewing angle according to their own viewing angle and environmental light conditions. The display screen 412 is an 11.6-inch 1080P touch display screen, which is used for counting program calling display and counting result display. In a further technical solution, the display screen 412 can be stored in the display screen slot on the fish passage 14, and the display screen slot is provided with a display screen cover plate 413 for protecting the display screen 412.

[0027] In a further technical solution, the camera 5 is a USB high-definition wide-angle camera, with a 170° distortion-free wide angle and a 2.8mm focal length, to realize the shooting of the overall range of the fish passageway, real-time high-definition transmission of the fry passing picture, and uploading of the captured fry image to the counting program for subsequent counting, for algorithm recognition of fry shape features and quantity.

[0028] In a further technical solution, all or part of the universal wheels 9 are brakeable universal wheels. The universal wheels are installed at the front two corners of the flow water fry counting device to facilitate the movement of the device, and the brakeable universal wheels are installed at the rear two corners to facilitate the fixation of the device during movement.

[0029] In a further technical solution, the mobile storage device further includes a storage box 8, which is installed on a support below the fish passageway. The storage box 8 is divided into a sundry storage cabinet 501 and an electronic component storage cabinet 502 by a storage cabinet partition 504. The electronic component storage cabinet 502 is coated with an anticorrosive material for storing multiple electrical devices, including a development board. A wiring opening 11 is provided above the electronic component storage cabinet, and a development board connection port 503 with a reserved hole position made of a profile material is provided in the wiring opening 11. The development board is connected to the connection line and display screen, camera, and light supplement lamp through the development board connection port 503 and the internal wiring channel 410 pre-set in the fish passageway 14.

[0030] In a further technical solution, considering the problems of inconvenient outdoor power supply and complex transportation and storage of accessories, the electronic component storage cabinet 503 also stores a 220v, 900,000-mA, 780w portable power supply. Through the designed internal wiring, the power supply is connected to the development board, light supplement lamp, camera, and display screen, which can be used for one week for the normal use of the flow water fry counting device, and facilitates outdoor operation.

[0031] In a further technical solution, the sundry storage cabinet 502 is used to store water pumps, water pipes, screws, and other sundries. The storage cabinet partition 501 with a sealing strip is used to isolate the electronic devices and water supply accessories to avoid electrochemical corrosion between water vapor and metal parts.

[0032] In a further technical solution, the mobile storage device further comprises a lifting rod 10, the bottom end of the lifting rod 10 is fixedly installed on the support, the top end is rotatably installed below the top end of the fish passage 14, and the bottom end of the fish passage 14 is provided with a longitudinal sliding rod 15; the sliding table 16 is matched with the sliding rod 15, so that the sliding table 16 can slide back and forth along the sliding rod 15; one end of the sliding table 16 is rotatably connected with a connecting rod 17, the other end of the connecting rod 17 is rotatably installed on the storage box 8; the other end of the sliding table 16 is rotatably connected with a transmission shaft 13, and the other end of the transmission shaft 13 is rotatably installed on the support. The lifting rod 10 is an electric lifting rod with a pushing speed of 10 nm / s and a pushing force of 1000 N, which is connected with the mobile portable power supply through a 12V to 24V booster module. When the lifting rod is raised or lowered, the top end of the fish passage 14 moves upward or downward, driving the sliding table to move backward or forward along the sliding rod, so that the inclination angle of the fish passage 14 increases or decreases. Considering that different kinds and sizes of fry have different sliding speeds in the same inclined angle passage, too high motion blur will cause counting errors, and a suitable lifting rate needs to be selected. The user can start and stop the lifting rod at any time through the controller to control the inclination angle of the upper part of the equipment, so that the fish passage 14 can be adjusted to a suitable inclination angle according to the counted fish, and the photographed fry is clear and complete.

[0033] The application also provides a use method of the high-precision fry counting device based on machine vision, which comprises the following steps:

[0034] Step 1: Turn on the portable mobile power supply in the electronic element storage box 502, connect the connection lines of the light supplement lamp 7, the camera 5, the lifting rod 10 and the display screen 412 to the mobile power supply, additionally connect the water pump power socket to the mobile power supply, and butt the water conveying pipe to the water conveying pipe interface 110 on the fish inlet 1 to transmit water flow and provide a suitable environment for the fry to slide down;

[0035] Step 2: Test whether the shooting picture of the camera 5 is clear, whether the shooting range covers the entire fish passage and whether the water supply of the water pump is stable, which can support the fry to swim through the passage smoothly. If the operation effect of the equipment is not ideal, the light illumination level of the light supplement lamp 7, the tightness of the hydraulic rod 10 and the fish inlet hinge screw 301 can be adjusted, and the sliding rail 211 can be adjusted to a suitable angle for fixation, so as to realize a suitable overall inclination angle of the equipment. In addition, the water pump level can also be adjusted to ensure that the fry can pass through the passage smoothly.

[0036] Step 3: At the fish passage, according to the test of ten same species of fry passing through, the position arrangement of the fish separating column 415 on the column arrangement groove plate 414 is adjusted to ensure the correct separating effect of the current experimental fry.

[0037] Step 4: Turn on the display screen 412 and run the counting program, select the fish species that need to be counted, and pour the fry into the fish inlet 1, ensuring that the fry can smoothly enter the counting area without sticking or missing. If the fry cannot be counted into the video area, adjust the height of the camera 5;

[0038] Step 5: Select the online counting function, call the camera to obtain the fry image in the channel in real time, and then perform program calculation to obtain the number of fry passing through the device, until all fry are counted;

[0039] Step 6: Adjust the hydraulic rod 10 back to the normal height, turn off the display screen 412 running program, turn off the portable power supply in the electronic component storage box 502, lock the electronic component storage box to avoid loss of items. Put the water pump, water pipe, mouse, keyboard and other devices into the sundry storage box 501 and lock it with the key;

[0040] In step 5, after counting is completed, the system automatically saves the counting data for subsequent analysis and record. At this time, the user can check the counting result through the control interface to confirm whether the fry quantity meets the expectation. Compared with the prior art, the present application has the following beneficial effects:

[0041] 1. Different from the mainstream fish counter on the market, the present application increases the electronic component storage cabinet and the sundry storage cabinet to facilitate storage of essential items, and increases the portable power supply, so that the electronic component wiring is concentrated in the electronic component storage box, facilitating outdoor operation without electricity.

[0042] 2. The present application provides multiple angle adjustable designs according to different fish species and environments. First, the fish inlet can pass through the fish passage through the slide rails on both sides, the support rod, the slide block nut, the adjustable screw and the hinge connection, thereby realizing adjustment of the fish inlet at an angle of 30-90°. In addition, the present application adds a hydraulic electric lifting rod device, which can adjust the inclination degree of the upper half of the box body through the lifting rod remote control, thereby controlling the flow speed of the fry and water.

[0043] 3. The present application can adjust the front and rear positions of the fish distribution baffle, change the arrangement mode and spacing of the acrylic column of the fish distribution baffle according to the different sizes of the fry.

[0044] 4. The design of the 360° omnidirectional rotating display screen facilitates the user to select a suitable angle to watch the display screen content in the outdoor strong light environment.

[0045] 5. The application is to prevent the adhesion of fry, and the fish separation baffle can solve the problem of fry adhesion through the fish inlet, and the interval of the separated fry can be set according to different fry. The stripe-shaped notch at the bottom of the fish inlet channel reduces the contact area of the pressure of the fry and the channel, thereby solving the problem of adhesion of the fry and the channel.

[0046] 6. The application designs a set of fry counting equipment specially based on the actual situation to meet the automation needs of fry counting in scenarios such as proliferation release and aquaculture, which has certain practical significance for promoting fishery mechanization and liberating manpower and resources. BRIEF DESCRIPTION OF DRAWINGS

[0047] The application will be further described below in combination with the drawings and embodiments.

[0048] Figure 1 is the overall use flowchart of the high-precision flow water fry counting equipment based on machine vision of the embodiment 1 of the application;

[0049] Figure 2 is a structural schematic diagram of the high-precision flow water fry counting equipment based on machine vision of the embodiment 1 of the application.

[0050] Figure 3 is a structural schematic diagram of the fish inlet of the high-precision flow water fry counting equipment based on machine vision of the embodiment 1 of the application;

[0051] Figure 4 is a structural schematic diagram of the fish passing channel of the high-precision flow water fry counting equipment based on machine vision of the embodiment 1 of the application;

[0052] Figure 5 is a structural schematic diagram of the storage box of the high-precision flow water fry counting equipment based on machine vision of the embodiment 1 of the application;

[0053] 1-fish inlet, 2-inclination angle adjusting device, 3-fish inlet cover plate, 4-display screen support, 5-camera, 6-fish outlet, 7-light supplementing lamp, 8-storage box, 9-omni-directional wheel, 10-lifting rod, 11-wiring opening, 12-fish separation baffle, 13-transmission shaft, 14-fish passing channel, 110-water pipeline interface, 111-horizontal water storage section, 210-adjustable screw, 211-slideway, 212-fixed hinge screw, 213-brace, 410-internal wiring channel, 411-stripe-shaped notch, 412-display screen, 413-display screen cover plate, 414-column arrangement groove plate, 415-fish separation column, 501-rubbish storage cabinet, 502-electronic component storage cabinet, 503-development board wiring port, 504-storage cabinet partition. DETAILED DESCRIPTION

[0054] The counting scheme of the present application will be described in more detail below in connection with specific embodiments and drawings.

[0055] Embodiment One

[0056] This embodiment relates to a high-precision flow water fry counting device based on machine vision, as shown in the accompanying drawings, which comprises a water flow conveying device, a fry shunting device, a counting processing device and a mobile storage device. Figures 2-5 As shown in the accompanying drawings, the water flow conveying device comprises a water pipe interface 110, a horizontal water storage section 111 and a water outlet; the water pipe interface 110 is arranged outside the horizontal water storage section 111, and the water outlet is arranged at the bottom of the other side of the horizontal water storage section 111.

[0057] As shown in the accompanying drawings, the water flow conveying device comprises a water pipe interface 110, a horizontal water storage section 111 and a water outlet; the water pipe interface 110 is arranged outside the horizontal water storage section 111, and the water outlet is arranged at the bottom of the other side of the horizontal water storage section 111. Figure 2 The water flow conveying device further comprises a variable frequency water pump and a water pipe, and the variable frequency water pump is of a type that can control the size of water flow. The variable frequency water pump is a 9000DC variable frequency water pump, and the water pipe comprises a rubber hose with a diameter of 20 mm, which can be connected to the iron water pipe interface 110 with a diameter of 20 mm. The horizontal water storage section 111 has a hollow water outlet, and water flow stored in the horizontal water storage section can flow out from the water outlet.

[0058] The fry shunting device comprises an inlet 1, a shunting baffle 12, a fish passage 14 and an outlet 6. As shown in the accompanying drawings, the fish passage 14 is arranged obliquely, the inlet 1 and the outlet 6 are arranged at the top end and the low end of the fish passage 14 respectively, and the shunting baffle 12 is arranged inside the fish passage 14. The bottom of the inlet 1 is in an inclined state, and its bottom end is rotatably connected to one end of the fish passage 14, and the other three edges are provided with baffles, and a horizontal water storage section 111 is arranged on the baffle at the top. An inclination angle adjusting device 2 is installed between the inlet 1 and the fish passage 14.

[0059] Figures 2-4 The inclination angle adjusting device 2 comprises a support rod 213, a sliding rail 211, a threaded sliding block and an adjustable screw 210, as shown in the accompanying drawings.

[0060] The inclination angle adjusting device 2 comprises a support rod 213, a sliding rail 211, a threaded sliding block and an adjustable screw 210, as shown in the accompanying drawings. Figure 3 ​The two sliding rails 211 are horizontally fixedly installed on the two sides of the fishway 14, and the two threaded sliding blocks are matched with the two sliding rails 211, so that the threaded sliding blocks can slide back and forth on the corresponding sliding rails 211. One end of the two supporting rods 213 is hingedly connected with the baffles on the two sides of the fish inlet 1 through the fixed hinge screws 212, and the other end of the two supporting rods 213 is hingedly connected with the two threaded sliding blocks through the two adjustable screws 210. When the threaded sliding blocks slide back and forth on the sliding rails 211, the adjustable screws 210 are driven to move horizontally, so that the supporting rods 213 drive the fish inlet to rotate, thereby achieving the purpose of adjusting the inclination angle of the fish inlet. After the adjustable screws 210 are tightened, the threaded sliding blocks can be fixed on the sliding rails 211, so that the supporting rods 213 and the fish inlet 1 are fixed at the positions at this time, and the inclination angle of the fish inlet 1 is fixed.

[0061] The inclination angle of the fish inlet 1 can be 30-90°, and the angle of the fry sliding down can be flexibly adjusted to control the falling speed. When the inclination angle is the maximum angle of 90°, the fish inlet plate and the fishway are in a closed state, and when the inclination angle is the minimum angle of 30°, it is the lowest angle at which the fry can be placed. The fish inlet 1 is provided with a stretch handle, which facilitates the adjustment of the angle of the fish inlet 1. The fishway 14 is provided with a fish inlet cover plate 3. Opening the fish inlet cover plate 3 can tighten or loosen the adjustable screws 210 when the fish inlet is inclined at about 90°, which facilitates the adjustment of the inclination angle of the fish inlet 1. Closing the fish inlet cover plate 3 can avoid the counting error caused by foreign matter entering the fishway 14.

[0062] The fishway baffle 12 is arranged downstream of the fish inlet 1 in the fishway 14, and includes a column arrangement groove plate 414 and a fish distribution column 415, as shown in Figure 3 and Figure 4 The column arrangement groove plate 414 is regularly arranged with one or more grooves, and one end of the plurality of fish distribution columns 415 is clamped in the groove and vertically fixed on the same side of the column arrangement groove plate 414. In use, the column arrangement groove plate 414 is horizontally arranged at the bottom of the fishway 14, so that the other end of the fish distribution column 415 is placed on the bottom of the fishway 14.

[0063] The groove on the column arrangement groove plate 414 is a circular groove with a radius of 1 cm, and each groove is spaced apart by 3 cm, and three rows are arranged, and each row is spaced apart by 4 cm; the fish distribution column 415 is a silica gel coated acrylic column, which is a cylindrical column with a diameter of 1 cm. The fish distribution column 414 is clamped in the groove, so that the fry can pass between the columns, thereby achieving the distribution of the fry, and the silica gel outside the fish distribution column 414 can prevent the fish from being injured, thereby solving the problem of a large number of fry entering the fish counter channel and overlapping and shielding each other.

[0064] The column arrangement groove plate 414 is movable, and the distance between the column arrangement groove plate 414 and the fish inlet 1 is adjustable. The fish separating column 415 is detachably installed. According to the size of the fish body, the discharging mode and the spacing of the column can be customized, so that an efficient arrangement mode is set, and large fry cannot pass through.

[0065] The fish passing channel 14 is the core area of the fry counting device. As the main counting area, the main body is a rectangular channel. The bottom plate is made of acrylic material and is provided with a stripe-shaped notch 411 on the surface. The bottom is provided with a light supplementing lamp 7, and the top is provided with a counting processing device. The brightness of the light supplementing lamp 7 can be adjusted, and the spacing of the stripe-shaped notch 411 is 2-4 cm.

[0066] The fish outlet 6 is inclinedly arranged, and the top end is fixedly connected with the opening of one end of the fish passing channel 14, as shown in Figure 2 At the same time, the top end opening of the fish outlet 6 is consistent with the length and width of the upper opening of the fish passing channel 14, and the width of the tail end opening is shortened by about 1 / 2.

[0067] The counting processing device includes a development board, a display screen 412 and a camera 5. The development board is in communication with the display screen 412, the camera 5 and the light supplementing lamp 7 respectively, and can count the fry through a preset counting program. The display screen 412 is fixedly installed outside the fish passing channel 14, and the camera 5 is installed at the top of the fish passing channel 14 and can shoot the whole bottom of the fish passing channel 14.

[0068] As shown in Figure 2 and Figure 4 The display screen 412 is installed above the fish passing channel 14 through a display screen support 4, and the display screen support 4 can be adjusted in all directions 360°. The display screen 412 is an 11.6-inch 1080P touch display screen, which is used for calling display and counting result display of the counting program. The display screen 412 can be stored in a display screen slot on the fish passing channel 14, and the display screen slot is provided with a display screen cover plate 413 for protecting the display screen 412.

[0069] The camera 5 is a USB high-definition wide-angle camera with 170° distortion-free wide-angle and 2.8mm focal length, which can realize shooting of the whole range of the fish passing channel, can realize real-time high-definition transmission of the fry passing picture, and can upload the photographed fry image to the counting program for subsequent counting, and can provide algorithm to identify the shape characteristics and quantity of the fry.

[0070] Because the real-time requirement of fry counting is high, the working configuration of the algorithm processing unit also has high requirements, therefore, the application adopts Nvidia Orin Nano development board counting processing according to the running requirement of the software program, in the embodiment, the algorithm of the last generation patent ZL202410715878.7 is utilized, and the code of the program is adjusted in a certain lightweight manner, so that the time consumption when the fry counting software application program is opened is shorter.

[0071] The mobile storage device comprises a support and universal wheels 9, as shown in the drawings, the support is used for supporting the fish passage 14, and the universal wheels 9 are installed at the bottom of the support. In the embodiment, the universal wheels are installed at the two corners in front of the flowing water fry counting equipment to facilitate the movement of the equipment, and the brakeable universal wheels are installed at the two corners at the back to facilitate the fixation of the equipment during the movement. Figure 2

[0072] The mobile storage device further comprises a storage box 8, the storage box is installed on the support and below the fish passage, as shown in the drawings. Figure 2 and Figure 5 The storage box 8 is divided into a sundry storage cabinet 501 and an electronic component storage cabinet 502 by a storage cabinet partition 504. The electronic component storage cabinet 502 is coated with an anticorrosive material, and stores a development board with a model of Nvidia Orin Nano, 8G display memory, 128G storage space, 1024 core NVIDIA Ampere architecture GPU with 32 Tensor Cores, a portable power supply with a power of 780w, 90 million milliamperes and 220v. A wiring opening 11 is arranged above the electronic component storage cabinet, the wiring opening 11 is provided with a development board wiring port 503 made of a profiled material, the development board is connected with the connection line, the display screen, the camera and the light supplement lamp through the development board wiring port 503 and the internal wiring channel 410 prearranged in the fish passage 14, and the portable power supply can be connected with the development board, the light supplement lamp, the camera and the display screen.

[0073] The sundry storage cabinet 502 is used for storing sundries such as water pumps, water pipes and screws.

[0074] The mobile storage device further comprises a lifting rod 10, as shown in the drawings. Figure 2 ​As shown, the bottom end of the lifting rod 10 is fixedly installed on the support, and the top end is rotatably installed below the top end of the fish passage 14, and the bottom end of the fish passage 14 is provided with a longitudinal sliding rod 15; the sliding table 16 is matched with the sliding rod 15, so that the sliding table 16 can slide back and forth along the sliding rod 15; one end of the sliding table 16 is rotatably connected with a connecting rod 17, and the other end of the connecting rod 17 is rotatably installed on the storage box 8; the other end of the sliding table 16 is rotatably connected with a transmission shaft 13, and the other end of the transmission shaft 13 is rotatably installed on the support. The lifting rod 10 is an electric lifting rod with a pushing speed of 10 nm / s and a pushing force of 1000N, which is connected with a mobile power supply through a 12V to 24V booster module. When the lifting rod 10 is raised or lowered, the top end of the fish passage 14 moves upward or downward, driving the sliding table 16 to move backward or forward along the sliding rod 15, so that the inclination angle of the fish passage 14 increases or decreases. Considering that different types and sizes of fry have different sliding speeds in the same inclined passage, the user can start and stop the lifting rod 10 at any time through the controller to control the inclination angle of the upper part of the device, so that the fish passage 14 can be adjusted to a suitable inclination angle according to the counted fish species, and the photographed fry is clear and complete.

[0075] Embodiment two

[0076] The present embodiment relates to the use method of the high-precision machine vision-based fry counting device in embodiment one, and the use method comprises the following steps, Figure 1 For the specific flow chart:

[0077] Step 1: Turn on the portable mobile power supply in the electronic element storage box 502, connect the connection lines of the light supplement lamp 7, the camera 5, the lifting rod 10 and the display screen 412 to the mobile power supply, in addition, connect the water pump power socket to the mobile power supply, and connect the water conveying pipe to the water conveying pipe interface 110 on the fish inlet 1 to transmit water flow and provide a suitable environment for the fry to slide down;

[0078] Step 2: Test whether the shooting picture of the camera 5 is clear, whether the shooting range covers the entire fish passage, and whether the water supply of the water pump is stable to support the fry to swim through the passage smoothly. If the operation effect of the device is not ideal, the light illumination level of the light supplement lamp 7, the tightness of the hydraulic rod 10 and the fish inlet hinge screw 301 can be adjusted, and the sliding rail 211 can be adjusted to a suitable angle for fixation, so as to realize a suitable overall inclination angle of the device, in addition, the water pump level can also be adjusted to ensure that the fry can pass through the passage smoothly;

[0079] Step 3: At the fish passage, according to the test of ten same species of fry, the position arrangement of the fish separating column 415 on the column arrangement groove plate 414 is adjusted to ensure the correct separating effect of the current experimental fry;

[0080] Step 4: Turn on the display screen 412 and run the counting program, select the fish species that need to be counted, and pour the fry into the fish inlet 1, ensuring that the fry can smoothly enter the counting area without sticking or missing. If the fry cannot be counted into the video area, adjust the height of the camera 5;

[0081] Step 5: Select the online counting function, call the camera to obtain real-time images of the fry in the channel, and then perform program calculation to obtain the number of fry passing through the device. Repeat this process until all fry are counted.

[0082] Step 6: Adjust the hydraulic rod 10 back to the normal height, turn off the running program of the display screen 412, turn off the portable power supply in the electronic component storage box 502, lock the electronic component storage box to prevent loss of items. Put the water pump, water pipe, mouse, keyboard, and other devices into the miscellaneous storage box 501 and lock it with the key.

[0083] In step 5, after counting is completed, the system will automatically save the counting data for subsequent analysis and record. At this time, the user can check the counting result through the control interface to confirm whether the number of fry meets the expected value.

[0084] 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 images of the fry in the flowing water through the camera, greatly simplifying the operation process. Compared with other counting techniques based on sensors, the present application reduces physical contact and potential damage to the fry, effectively improving the survival rate during the fry counting process.

Claims

1. A high-precision flowing water fish fry counting device based on machine vision, characterized in that, The flowing water fish fry counting device includes a water conveying device, a fish fry diversion device, a counting processing device, and a mobile storage device; 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. The fish fry diversion device includes a fish inlet, a fish diversion baffle, a fish passage, and a fish outlet. The fish passage is inclined, with the fish inlet and fish outlet located at the top and bottom of the passage, respectively. The fish diversion baffle is located inside the fish passage. The bottom of the fish inlet is inclined, and its bottom end is rotatably connected to one end of the fish passage. Baffles are provided on its other three edges, and a horizontal water storage section is provided on the top baffle. An inclination angle adjustment device is installed between the fish inlet and the fish passage. The fish passage baffle is located downstream of the fish inlet in the fish passage channel and includes a column arrangement groove plate and fish dividing columns. The column arrangement groove plate has one or more rows of grooves arranged regularly. One end of each of the multiple fish dividing columns is stuck in the groove and is vertically fixed to the same side of the column arrangement groove. In use, the column arrangement groove plate is horizontally arranged at the bottom of the fish passage channel, so that the other end of the fish dividing columns is placed at the bottom of the fish passage channel. The main body of the fish passage is a rectangular passage, with supplementary lights installed at the bottom and a counting processing device at the top; The fish outlet is set at an angle, and its top end is fixedly connected to the opening at one end of the fish passage. The counting processing device includes a development board, a display screen, and a camera; the development board is connected to the display screen, the camera, and a supplementary light, and can count fish fry through a preset counting program; the display screen is fixedly installed outside the fish passage, and the camera is installed at the top of the fish passage, which can capture the entire bottom of the fish passage; The mobile storage device includes a bracket and casters. The bracket is used to support the fish passage, and the casters are mounted on the bottom of the bracket.

2. The high-precision flowing water fish fry counting device based on machine vision according to claim 1, characterized in that, The tilt angle adjustment device includes a support rod, a slide rail, a threaded slider, and an adjustable screw. Two slide rails are horizontally fixed on both sides of the fish passage, and two threaded sliders cooperate with the two slide rails, allowing the threaded sliders to slide back and forth on their respective rails. One end of each of the two support rods is hinged to a baffle on either side of the fish inlet, and the other end of each support rod is hinged to the two threaded sliders via two adjustable screws. When the threaded sliders slide back and forth on the slide rails, they drive the adjustable screws to move horizontally back and forth, causing the support rods to rotate the fish inlet together, thus adjusting the tilt angle of the fish inlet. After tightening the adjustable screws, the threaded sliders can be fixed on the slide rails, thereby fixing the support rods and the fish inlet in their current positions, thus fixing the tilt angle of the fish inlet.

3. The high-precision flowing water fish fry counting device based on machine vision according to claim 1, characterized in that, The inlet angle can be 30 to 90°; the fish passage is provided with an inlet cover plate.

4. The high-precision flowing water fish fry counting device based on machine vision according to claim 1, characterized in that, The fish-dividing column is an acrylic column with silicone covering its outer side.

5. A high-precision flowing water fish fry counting device based on machine vision according to claim 1, characterized in that, The column arrangement trough plate is movable, and the distance between it and the fish inlet is adjustable; the fish dividing column is detachable and installable; the grooves on the column arrangement trough plate are circular grooves, arranged in three rows.

6. A high-precision flowing water fish fry counting device based on machine vision according to claim 1, characterized in that, The bottom of the fish passage is a transparent acrylic plate with striped grooves; the brightness of the supplementary light is adjustable.

7. A high-precision flowing water fish fry counting device based on machine vision according to claim 1, characterized in that, The display screen is mounted above the fish passage via a display screen bracket, which can be rotated and adjusted 360° in all directions.

8. A high-precision flowing water fish fry counting device based on machine vision according to claim 1, characterized in that, The mobile storage device also includes a lifting rod, the bottom end of which is fixedly mounted on a bracket, and its top end is rotatably mounted below the top of the fish passage. A longitudinal slide bar is provided below the bottom end of the fish passage. The slide table cooperates with the slide bar, allowing the slide table to slide back and forth along the slide bar. One end of the slide table is rotatably connected to a connecting rod, and the other end of the connecting rod is rotatably mounted on the storage box. The other end of the slide table is rotatably connected to a drive shaft, and the other end of the drive shaft is rotatably mounted on the bracket.

9. A high-precision flowing water fish fry counting device based on machine vision according to claim 1, characterized in that, The mobile storage device also includes a storage box, which is mounted on a bracket below the fish passage. The storage box is divided into a miscellaneous storage cabinet and an electronic component storage cabinet by a storage cabinet partition. The electronic component storage cabinet is coated with an anti-corrosion material for storing various electrical devices. A wiring opening is provided above the electronic component storage cabinet, and a development board connection port with a reserved hole made of profile is provided in the wiring opening. The development board is connected to the display screen, camera, and supplementary light through the development board connection port and the preset internal wiring channel in the fish passage.

10. A method of using a high-precision flowing water fish fry counting device based on machine vision, characterized in that, The usage method includes the following: Step 1: Turn on the portable power bank in the electronic component storage box, connect the connection cables of the supplementary light, camera, lifting rod and display screen to the power bank, connect the water pump power socket to the power bank, and connect the water supply pipe to the water supply pipe interface on the fish inlet to transmit water and provide a suitable environment for the fish fry to slide down. Step 2: Test whether the camera's image is clear, whether the shooting range covers the entire fish passage, and whether the water pump supply is stable enough to support the fish fry to swim through the passage smoothly. If the equipment is not operating well, adjust the supplementary lighting level, the tightness of the hydraulic rod and the hinge screw of the fish inlet, and fix the slide rail at a suitable angle to achieve a suitable overall tilt angle of the equipment. In addition, you can also adjust the water pump level to ensure that the fish fry pass through the passage smoothly. Step 3: At the fish passage, based on the test of ten fish fry of the same species passing through, adjust the position and arrangement of the fish diversion columns on the column arrangement trough to ensure the correct diversion effect of the current experimental fish fry; Step 4: Turn on the display and run the counting program. Select the fish species to be counted and pour the fry into the fish inlet. Ensure that the fry can enter the counting area smoothly without sticking or missing any. If the fry cannot be counted in the video area, adjust the camera height. Step 5: Select the online counting function, call the camera to obtain real-time images of the fish fry in the channel, and then calculate the number of fish fry passing through the device until all fish fry have been counted; Step 6: Adjust the hydraulic rod back to its normal height, turn off the display screen's operating program, turn off the portable power bank in the electronic component storage box, and lock the electronic component storage box to prevent the loss of items; put the water pump, water pipes, mouse, keyboard, and other equipment into the miscellaneous storage box and lock it with a key.

Images