A fish fry counting device

Abstract

The present invention relates to a fry counting device, comprising a fish supply device, a fishway and a counting box, wherein the fishway is tilted downward as a whole, a fill light is provided at the bottom, and a host is provided at the top, wherein the host comprises a camera arranged at the bottom for photographing the internal position of the counting box, a development board arranged at the inside, and a display screen arranged at the top, and is characterized in that the fish supply device can be a pump suction type, a siphon type or a pneumatic type, and the fishway comprises an initial step channel, a middle step channel, and a final step channel connected in sequence, and the angle between the fishway and the horizontal plane decreases step by step. The stepped channel is used to gradually ease the water flow, so that the fry can be evenly distributed at the shooting position, and through different modifications of the fish supply device, it plays a role in preventing the fry from being injured, reducing human operation, and speeding up the fry counting process on the basis of ensuring the counting accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of counting mechanisms for randomly distributed objects, and in particular relates to a fry counting device. Background Art

[0002] In the development of aquaculture, accurate counting of live fish is an important part of fish fry breeding and sales. At present, fish counting is still generally done by traditional manual operation and naked eye counting. There are disadvantages such as poor counting accuracy, low efficiency, and limited by manual experience. In recent years, various devices for automatic counting of fish fry have emerged at home and abroad. These devices are mainly used for counting small batches of fish fry and cannot meet the requirements of large-scale continuous counting of live fish.

[0003] From the patent "An automatic live fish counting system based on computer vision" (publication number CN104966122A), an automatic live fish counting system based on computer vision is known. It uses computer vision and automatic control technology to solve the problem of automatic live fish counting, and performs video analysis on live fish flowing through the detection area to achieve fast, accurate and automatic counting, so that the aquaculture industry can count live fish automatically, efficiently, accurately and stress-free, and improve the level of aquaculture automation. The automatic live fish counting system is connected to an inclined fishway on one side of the water filter tank. The inclination angle of the fishway is 5°-20°. When the live fish are sucked into the water filter tank by the fish suction pump, the water is filtered through the water filter net to ensure that the fish can pass through the detection area close to the bottom of the fishway.

[0004] The automatic live fish counting system has the problem that the water filter box is placed horizontally, which makes it difficult for live fish to swim freely. The water filter net may intercept live fish and may cause damage to the live fish. In order to control the amount of water, the gap of the water filter net is designed to be larger, and there may even be a problem of filtering some small fry. In addition, the automatic live fish counting system inputs live fish through an external fish suction pump and fish sorting machine, which is easy to cause damage during transportation, and the fry counting has higher requirements for the survival rate of the fry. In addition, because mechanical equipment usually avoids opening and closing at will to prevent a reduction in service life, when the input amount of fry is greater than the output amount, the fry are prone to continuous accumulation in the counting device, affecting the survival rate of the fry. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a fry counting device, which eliminates the design of a water filter box and a water filter net, and sets a stepped channel to gradually ease the water flow, so that the fry can be evenly distributed at the shooting position, which prevents the fry from being injured, reduces manual operation, and speeds up the fry counting process on the basis of ensuring the counting accuracy. In addition, by improving the design of the fish supply device, the counting device can intermittently suck in the fry, which is convenient for counting a large number of fry in batches, which is conducive to improving the counting accuracy and preventing the fry from being injured before counting.

[0006] The technical solution adopted by the present invention to solve its technical problem is: to provide a fry counting device, including a fish supply device, a fishway and a counting box, the fishway is tilted downward as a whole, a fill light is provided at the bottom, and a host is provided at the top, the host includes a camera arranged at the bottom for photographing the internal position of the counting box, a development board arranged inside, and a display screen arranged at the top, and is characterized in that the fish supply device can be a pump suction type, a siphon type or a pneumatic type, the fishway includes an initial step channel, a middle step channel, and a final step channel connected in sequence, and the angle between the fishway and the horizontal plane decreases step by step.

[0007] The pump-suction fish supply device comprises a water pipe connected to the fish pond of fry to be tested and a connecting pipe connected to the counting box, a vacuum pump is arranged between the water pipe and the connecting pipe, and the fishway is located inside the counting box.

[0008] The shape of the outlet of the connecting pipe connected to one end of the counting box is an ellipse, and the major axis of the ellipse coincides with the edge line of the starting end of the initial step channel.

[0009] The water pipe is in the shape of a funnel which is thick at the bottom and thin at the top.

[0010] The siphon-type fish supply device includes a water pipe connecting the fish pond to be tested and the counting box. A first piston door is provided at the place where the water pipe is connected to the counting box. The first piston door is connected to the floating block through a first connecting rod. At this time, the counting box has no box cover. The fishway is located below the counting box and is sealed and separated from the counting box by a first sealing door. The first sealing door is provided with a first connecting line and is connected to a first floating ball.

[0011] The pneumatic fish supply device includes a water pipe connecting the fish pond to be tested and the counting box, which is arranged outside the counting box and connected to the exhaust pump of the counting box through a hose. At this time, the fishway is located inside the counting box, and an air-sealing piston is provided on the top of the counting box. The air-sealing piston is connected to the second float through a second connecting rod, and the air-sealing piston is connected to the second sealing door located at the tail of the terminal stepped channel through a second connecting line on the outside.

[0012] The angle between the initial step channel and the horizontal plane is 45°, the angle between the middle step channel and the horizontal plane is 20°, the angle between the final step channel and the horizontal plane is 15°, and the three step channels are arranged in a stepped shape.

[0013] The counting box is made of plastic, and the initial step channel, the middle step channel and the final step channel are white plastic plates.

[0014] The host is made of plastic and aluminum alloy.

[0015] Beneficial Effects

[0016] The present invention adopts a stepped channel to gradually ease the water flow. The larger slope in the initial section accelerates the live fish pumped in first and enters the camera section earlier. The angle of the stepped channel in the middle section is slightly slower. The first two sections jointly ensure that the live fish do not overlap when the camera is shooting, and are evenly distributed in the shooting position. The stepped channel in the last section is the most gentle, so that the live fish are clearly presented in the shooting position to avoid affecting the counting effect. The ramp in the counting box is tilted downward as a whole, without any partition or gap in the middle, and no water filtering is required, and the live fish will not be trapped or damaged. The live fish flow out of the counting box together with the water flow, which will not cause the live fish to lack water and oxygen, and is more convenient for backflow or bagging. Different schemes of siphon type and air pressure type fish supply devices can also be used to reduce the hard collision of the fry with the machine during the counting process. The intermittent suction of fry in the counting box is convenient for counting a large number of fry in batches, which is conducive to improving the counting accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a fry counting device.

[0018] Among them, 1-water pipe, 2-vacuum pump, 3-connecting pipe, 4-counting box, 5-host, 6-initial step channel, 7-middle step channel, 8-final step channel, 9-fill light, 10-camera, 11-pump and fill light switch, 12-display screen, 13-development board.

[0019] Figure 2 It is an exploded view of the host 5 in the present invention.

[0020] Figure 3 It is a schematic diagram of the structure when the present invention adopts a siphon type fish supply device.

[0021] Among them, 14 is a fish pond for fry to be tested, 15 is a floating block, 16 is a first floating ball, 17 is a first connecting line, 18 is a first sealing door, 19 is a first piston door, and 20 is a first connecting rod.

[0022] Figure 4 This is a schematic diagram of the structure of the present invention when a pneumatic fish supply device is used.

[0023] Among them, 21 is an air-sealed piston, 22 is a hose, 23 is an exhaust pump, 24 is a second connecting rod, 25 is a second floating ball, 26 is a second connecting line, and 27 is a second sealing door.

[0024] Figure 5 This is a schematic diagram of the sealing door control structure when the pneumatic fish supply device is adopted in the present invention.

[0025] The same reference numerals in the various drawings represent the same components. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0027] Example 1

[0028] like Figure 1 As shown, a pump-suction type fish fry counting device, a vacuum pump 2 pumps the fry into a plastic counting box 4 through a water pipe 1 and a connecting pipe 3. The counting box 4 supports the entire counting device, and includes three sections of stepped channels 6, 7, and 8 made of white plastic, wherein the initial section of the stepped channel 6 is connected to the connecting pipe 3, and the final section of the stepped channel 8 is connected to the outside. A host 5 is provided on the top of the counting box 4, and the host 5 includes a camera 10, a pump and a fill light switch 11, a display screen 12, and a development board 13. The pump and the fill light switch 11 are connected through an external cable and control the vacuum pump 2 and the fill light 9. The fill light 9 is provided below the final section of the stepped channel 8.

[0029] The working process of this embodiment is as follows: the vacuum pump 2 extracts the fry through the water pipe 1 directly connected to the fish pond or fish box, and then pumps the fry into the counting box 4 through the connecting pipe 3. The water pipe 1 is a funnel shape with a thick bottom and a thin top. The outlet shape of the connecting pipe 3 connected to one end of the counting box 4 is an ellipse with adjustable size. The major axis of the ellipse coincides with the edge line of the starting end of the initial step channel 6, so that the fry can smoothly enter the counting box 4. The initial step channel 6 is inclined downward at 45° and has a short stroke, so that the fry entering first can quickly enter the middle step channel 7 to open the distance with the fry entering later. The middle step channel is inclined downward at 20° and has a medium stroke, which slows down the speed and impact brought by the initial step channel, and then connects to the final step channel 8. The final step channel 8 is inclined downward at 15°, has the longest stroke and is connected to the outside world. The fry passing through the initial and middle step channels have been fully spread out and pass through the final step channel 8 at a basically fixed rate and interval. A fill light 8 is detachably installed at the bottom of the terminal step channel, which is used for fill light during video recording and to improve the clarity during calculation and resolution. The vacuum pump 2 and fill light 8 are connected to the pump and fill light switch 11 in the host 5 through an external cable. When the vacuum pump and fill light are started, the camera 10 and the development board 13 in the host 5 are also started at the same time. The camera 10 is installed at the top of the counting box away from the end of the vacuum pump, so as to capture the image of the fry flowing through the terminal step channel below and hand it over to the development board 13 for analysis and processing, and identify the number of fry in each frame to obtain the total number of fry. The video and statistical data will be displayed on the display screen 12 for viewing. The fry continue to flow out after passing through the shooting area, and can be exiled to other low-lying fish ponds or directly bagged for transportation and sale.

[0030] The counting box 4 is made of plastic to reduce the weight of the equipment, and its basic dimensions are 70cmX45cmX64.3cm. The initial step channel 6, the middle step channel 7, and the final step channel 8 are 0.8cm thick white plastic plates to prevent corrosion and oxidation, and their basic dimensions are 48.2cmX45cm, 48.9cmX45cm, and 77.2cmX45cm, respectively.

[0031] The host 5 is made of plastic and aluminum alloy, making the device lighter and easier to move, and its basic size is 30cmX20cmX8cm.

[0032] Example 2

[0033] like Figure 3 As shown, a siphon-type fish fry counting device includes a fish pond 14 for fry to be tested and a counting box 4. One end of a water pipe 1 extends into the fish pond 14 for fry to be tested, and the other end passes into the bottom of the counting box 4 and is connected to a first piston door 19. The piston door 19 is connected to a floating block 15 through a first connecting rod 20. A first sealing door 18 separates the counting box 4 from the stepped passages 6, 7, and 8. The first sealing door 18 is connected to a first floating ball 16 through a first connecting line 17. A host 5 is provided at the top center of the terminal stepped passage 8. The host 5 includes a display screen 12, a development board 13, and a camera 10.

[0034] The working process of this embodiment is as follows: before starting the device, the top of the counting box 4 of the siphon type fry counting device is placed at a position lower than the bottom of the fry pond 14 to be tested, and then the water pipe 1 is filled with pond water, and some water is also added to the counting box 4. The counting box 4 is made of plastic, without a box cover, and has a basic size of 50cmX40cmX40cm. A 20cmX10cm water outlet is opened below one end of the box. After the preparation is completed, one end of the water pipe 1 is extended into the fry pond 1 to be tested, and the other end is passed into the counting box 4 and connected to the piston door. At this time, there is a liquid level difference at both ends of the water pipe 2, and the siphon principle is used to make water and fry gradually enter the storage box 4. As the water level in the storage tank gradually rises, the floating block 15 floats up with the rise of the water level, driving the first connecting rod 20 to swing. The swing of the first connecting rod 20 drives the first piston door 19 fixed at the lower end of the connecting rod. When the floating block rises to a certain height, the first piston door 19 completely seals the water pipe mouth. At the same time, the first floating ball 16 rises with the rise of the water level, gradually tightening the first connecting line 17. Finally, the buoyancy overcomes the water pressure and opens the first sealing door 18 covering the water outlet at the bottom of the counting box 4. The floating block 15 and the first floating ball 16 are made of plastic. The basic size of the floating block 15 is 5cm×4cm×5cm. The size of the first floating ball 16 is determined by F=ρ 水 g 球, F·L=M·X Hooke's law and lever principle formula determine that the radius is 9.6cm. The first connecting rod 20 is made of plastic. The first connecting line 17 uses an elastic rope with an elastic coefficient of 200N / m, an initial length of 20cm, and can store 40N of elastic force to meet the conditions for pulling open the sealed door. The elastic potential energy is stored by stretching the elastic rope. When the first sealed door 18 is opened and the water pressure is lost, the first connecting line 17 releases the stored elastic potential energy to shorten the length, ensuring that the first sealed door 18 is opened to a sufficient degree that water and fry can flow smoothly into the initial step channel 6. The initial step channel 6 is inclined downward at 45° and has a short stroke, so that the fry that enters first can quickly enter the middle step channel 7 to open the distance with the fry that enters later. The middle step channel is inclined downward at 20° and has a medium stroke, which slows down the speed and impact brought by the initial step channel, and then connects to the final step channel 8. The end step channel 8 is inclined downward at 15°, and a host 9 is provided at the center of the top thereof, including a display screen 12, a development board 13 and a camera 10. The camera 10 is a fisheye camera, which can expand the shooting range, shoot the fry passing through the fishway and transmit the image to the development board 13 in the host 5, process the image uploaded by the camera through a pre-written program, and finally display the processed image and the number of fry counted on the display screen 12. The fry continue to flow out after passing through the shooting area, and can be exiled to other fish ponds at a low position or directly bagged for transportation, sale, etc. As the water and fry gradually flow out of the counting box 4, since the water input by the water pipe 1 is less than the water flowing out, the water level in the counting box 4 continues to drop, and the floating block 15 and the first floating ball 16 also drop accordingly, until the first sealing door 18 is closed and the first piston door 19 is opened to complete a cycle, repeating the cycle of water storage-opening the door to release water-closing the door to store water, and intermittently sucking the fry until the counting is completed.

[0035] Example 3

[0036] like Figure 4 As shown, a pneumatic fish fry counting device for fish feeding includes a counting box 4, an exhaust pump 23 connected to the counting box 4 through a hose 22, and a water pipe 1 extending from the counting box 4. The counting box 4 supports the entire counting device, and includes three sections of stepped channels 6, 7, and 8 made of white plastic. The initial stepped channel 6 is connected to the water pipe 1, and the top of the final stepped channel 8 is provided with an airtight piston 21 and connected to the second sealing door 27 at the tail end of the fishway through a second connecting line 26. The lower part of the airtight piston 21 is connected to the second floating ball 25 through a second connecting rod 24. A host is also provided at the top center of the final stepped channel, and the host includes a display screen 12, a development board 13, and a camera 10, and fill lights 9 are arranged on both sides of the camera 10.

[0037] The working process of this embodiment is as follows: before the equipment is started, the sealing performance of the second sealing door 27 and the airtight piston 21 is checked and one end of the water pipe 1 is extended into the fish pond of the fry to be tested. After the exhaust pump 23 is started to work, the air in the counting box 4 is extracted through the hose 22. As the air pressure in the box decreases, water and fry are sucked into the counting box 4 by negative pressure. One end of the fry entering the counting box is the starting point of the initial step channel 6. The initial step channel 6 is inclined downward at 45° and has a short stroke, so that the fry entering first can enter the middle step channel 7 quickly to open the distance with the fry entering later. The middle step channel is inclined downward at 20° and has a medium stroke, which slows down the speed and impact brought by the initial step channel, and then connects to the final step channel 8. The final step channel 8 is inclined downward at 15° and is connected to the sealing door. The camera 10 is installed at the top center of the last step channel 8, so as to capture the image of the fry flowing through the lower end step channel and hand it over to the development board 13 for analysis and processing, and identify the number of fry in each frame to obtain the total number of fry. The video and statistical data will be displayed on the display screen 12 for viewing. The filmed fry flows to the bottom of the counting box 4 and is temporarily blocked by the sealing door. As the water and fry entering the counting box 2 increase, when the liquid level reaches a certain height, the second float 25 is raised to open the airtight piston 21, so that the second connecting line 26 connected to the airtight piston 21 can open the second sealing door 27 and discharge the accumulated water and fry. The fry can then be exiled to other low-level fish ponds or directly bagged for transportation, sale, etc. When arranging fish, the airtight state of the counting box 4 is destroyed, and the air pressure returns to normal, and the water pipe 1 no longer inhales fry. When the water and fry in the counting box 4 are emptied, the second float 25 falls naturally, and the airtight piston 21 connected to the second connecting rod 24 also falls, driving the second sealing door 27 to close through the second connecting line 26, and the counting box 4 enters the sealed state again, repeating the cycle of sealed exhaust-fish suction-water discharge-sealed exhaust, and intermittently sucking fry until the counting is completed.

Claims

1. A fry counting device, comprising a fish supply device, a fishway and a counting box (4), wherein the fishway is tilted downward as a whole, a fill light (9) is provided at the bottom, and a host (5) is provided at the top, wherein the host (5) comprises a camera (10) provided at the bottom for photographing the internal position of the counting box, a development board (13) provided inside, and a display screen (12) provided at the top, wherein: The fishway comprises an initial step channel (6), a middle step channel (7), and a final step channel (8) which are connected in sequence. The angle between the fishway and the horizontal plane decreases step by step. The angle between the initial step channel (6) and the horizontal plane is 45°, the angle between the middle step channel (7) and the horizontal plane is 20°, and the angle between the final step channel (8) and the horizontal plane is 15°. The three step channels are arranged in a stepped shape. The fish supply device is of pump suction type, siphon type or air pressure type. The pump-suction fish supply device comprises a water pipe (1) connected to a fish pond of fry to be tested and a connecting pipe (3) connected to a counting box (4), a vacuum pump (2) is provided between the water pipe (1) and the connecting pipe (3), and the fishway is located inside the counting box (4); The siphon type fish supply device comprises a water pipe (1) connecting a fish pond (14) of fry to be tested and a counting box (4); a first piston door (19) is provided at the place where the water pipe (1) is connected to the counting box (4); the first piston door (19) is connected to a floating block (15) via a first connecting rod (20); at this time, the counting box (4) has no box cover; the fishway is located below the counting box (4) and is sealed and separated from the counting box (4) by a first sealing door (18); a first connecting line (17) is provided on the first sealing door (18) and is connected to a first floating ball (16); The pneumatic fish supply device comprises a water pipe (1) connecting a fish pond for fry to be tested and a counting box (4), an exhaust pump (23) arranged outside the counting box (4) and connected to the counting box (4) through a hose (22), wherein the fishway is located inside the counting box (4), an airtight piston (21) is arranged on the top of the counting box (4), the airtight piston (21) is connected to a second floating ball (25) through a second connecting rod (24), and the airtight piston (21) is connected to a second sealing door (27) located at the tail of the terminal stepped passage (8) through a second connecting line (26) on the outside.

2. A fry counting device according to claim 1, characterized in that: The shape of the outlet of one end of the connecting pipe (3) connected to the counting box (4) is an ellipse, and the major axis of the ellipse coincides with the edge line of the starting end of the initial step channel (6).

3. A fry counting device according to claim 2, characterized in that: The water pipe (1) is in the shape of a funnel which is thick at the bottom and thin at the top.

4. A fry counting device according to claim 1, characterized in that: The counting box (4) is made of plastic, and the initial step channel (6), the middle step channel (7) and the final step channel (8) are white plastic plates.

5. A fry counting device according to claim 1, characterized in that: The host (5) is made of plastic and aluminum alloy.

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