Device and method for collecting physical sign data of fish for culture of seriola quinqueradiata

Abstract

The invention relates to the field of marine organism sign recognition and analysis, in particular to a device and a method for collecting sign data of fish for high-body seriola cultivation, the device comprises a fish passing pipe, one end of the fish passing pipe is provided with a radial measuring assembly for measuring the body width and the body height of high-body seriola, and the outer side of the fish passing pipe is sleeved with a frame assembly for providing support; the radial measuring assembly comprises a plurality of arc-shaped plates hinged to one end of the fish passing pipe, first springs are fixedly connected to the outer sides of the arc-shaped plates, deformation sensors used for detecting the deformation quantity of the first springs are fixedly connected to the first springs, the deformation sensors are electrically connected with a controller, and fixing plates are fixedly connected to the other ends of the first springs; the fixing plates are fixedly connected with the frame assembly. An axial measuring assembly used for measuring the body length of the high body and the seriola is arranged at the end, away from the fish passing pipe, of the arc-shaped plate. According to the invention, the arc-shaped plate is opened and closed to fit the measurement structure of the fish body, the measurement precision is not influenced by light, and the body width and height data of the high body seriola can be accurately captured.

Description

Technical Field

[0001] This invention relates to the field of marine organism vital sign identification and analysis, specifically to a device and method for collecting vital sign data of amberjack used in aquaculture. Background Technology

[0002] With the large-scale development of the marine aquaculture industry, the amberjack, as an important economic marine fish with tender flesh and fast growth rate, has seen its aquaculture scale expand year by year. Body length, width, and height data are core data for assessing growth status, adjusting feeding strategies, predicting disease risks, and optimizing stocking density. Accurate and efficient collection of these vital signs data is crucial for improving the yield and quality of amberjack aquaculture.

[0003] In existing technologies, such as the underwater three-dimensional online measurement system for fish phenotypic characteristics, pressure-resistant and corrosion-resistant underwater cameras are deployed in aquaculture cages or ponds. A multi-color gradient lighting system is used to assist in the acquisition of dynamic images of the fish. A self-developed semantic segmentation algorithm is used to filter out water refraction interference, extract the three-dimensional contour of the fish, and calculate morphological parameters such as total length, body thickness, and body height. Its core function is to provide high-throughput, non-contact fish phenotypic data measurement services for genetic breeding and large-scale aquaculture.

[0004] However, in practical use, the system's accuracy in measuring body width and height is limited. Its image contour extraction-based measurement method is easily affected by rapid fish movement and water turbidity, making it impossible to achieve a physically close measurement of the fish. It can only estimate body width and height through 3D modeling, and the algorithm model has high training costs. After deployment, it requires a high-configuration computer for continuous analysis, resulting in high operating costs. Therefore, it is necessary to propose a device and method for collecting vital signs data of high-body amberjack aquaculture. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a device and method for collecting vital signs data of amberjack aquaculture. The device uses a measurement structure with an arc-shaped plate that opens and closes to fit the fish's body to accurately capture the body width and height data of amberjack. An axial measurement component measures the body length of the amberjack. This method is unaffected by ambient light, improving applicability and significantly reducing costs. Furthermore, the combination of a heat-guiding component and a food-guiding component enhances data acquisition efficiency.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A fish vital sign data collection device for aquaculture of high-body amberjack includes a fish passage tube. One end of the fish passage tube is provided with a radial measuring component for measuring the body width and height of the high-body amberjack. A frame assembly for providing support is sleeved on the outside of the fish passage tube. The radial measuring component includes several arc-shaped plates hinged to one end of the fish passage tube. The ends of the arc-shaped plates away from the fish passage tube form an outlet. A first spring is fixedly connected to the outside of each arc-shaped plate. A deformation sensor for detecting the deformation of the first spring is fixedly connected to the middle side surface of each first spring. The deformation sensor is electrically connected to a controller. A fixing plate is fixedly connected to the other end of each first spring. The fixing plate is fixedly connected to the frame assembly. An axial measuring component for measuring the body length of the high-body amberjack is provided at the end of the arc-shaped plate away from the fish passage tube. A food guiding component for guiding the high-body amberjack with food is provided on one side of the frame assembly. A heat guiding component for guiding the high-body amberjack with a heat source is sleeved on the outside of the fish passage tube.

[0007] The technical principles of the above solution are as follows: The device is placed on the fish's swimming path. A heat source is generated by the heat guiding component to attract amberjacks from the end of the fish passage tube away from the curved plate. When the amberjacks pass through the curved plate area, they push the curved plate to open around the hinge. The curved plate compresses the first spring. The deformation sensor sends a deformation signal to the controller and calculates the amberjack's body width and height. At the same time, the food guiding component guides the amberjacks to continue passing through the area. Due to the action of the first spring, the end of the curved plate always fits against the amberjack's body during the process, so the amberjack's body length is measured by the axial measuring component.

[0008] The above approach has the following beneficial effects: 1. This invention uses a physical fit measurement structure with an arc plate and a first spring. When the fish passes by, the arc plate always fits tightly with the outline of the fish under the action of the first spring. The deformation sensor directly captures the deformation and converts the body width and body height data. It is not affected by environmental factors such as water turbidity and blurring due to rapid swimming of the fish, thus improving the measurement accuracy of core vital signs.

[0009] 2. This invention can complete data acquisition and calculation using only a basic controller and sensors, reducing the cost of equipment development, use and maintenance, and making it more suitable for large-scale deployment in high-body amberjack farming scenarios.

[0010] 3. The present invention is equipped with a dual active attraction of heat guiding component and food guiding component, which can guide the high-body yellowtail into the fish tube measurement area in an orderly manner along a fixed path, thereby improving the measurement efficiency.

[0011] Furthermore, the frame assembly includes a bracket and several support rods fixedly connected to the outer wall of the fish passage tube, with the other end of each support rod fixedly connected to the bracket, and the fixing plates fixedly connected to the bracket.

[0012] Beneficial effects: The fixed cooperation between the support rod and the bracket forms a stable support structure, providing a stable installation platform for the fixing plate and food guiding components, improving the stability and durability of the device in the use environment, and ensuring accurate measurement.

[0013] Furthermore, each of the first springs is fitted with a folded tube, one end of which is fixedly connected to the arc-shaped plate, and the other end of which is fixedly connected to the adjacent fixed plate.

[0014] Beneficial effects: The folded tube can seal and protect the first spring, preventing mud, sand, biological attachment, or corrosive substances in the water from contacting the first spring, preventing the first spring from rusting, getting stuck, or losing its elasticity, and ensuring that the first spring maintains its sensitive expansion and contraction performance during long-term use. This, in turn, ensures the fitting accuracy of the arc plate to the fish and the detection accuracy of the deformation sensor, and extends the service life of the core measuring components of the device.

[0015] Furthermore, the axial measurement component includes several rollers. The end of the arc plate away from the fish tube is rotatably engaged with the adjacent roller. A roller encoder for converting the roller rotation signal into an electrical pulse signal is fixedly connected to the axle of the roller that rotatably engages with the arc plate. The roller encoder transmits the electrical pulse signal to the controller.

[0016] Beneficial effects: By rolling the rollers into contact with the fish, the axial movement of the fish is converted into the rotational motion of the rollers. In conjunction with the roller encoder, the mechanical motion is converted into precise electrical pulse signals. The controller can quickly calculate the body length data. The measurement process is carried out synchronously with the radial measurement, realizing the synchronous acquisition of three parameters: body width, body height, and body length. This solves the problem of body length measurement distortion caused by asynchronous parameter acquisition. At the same time, because the rollers reduce friction, the fish can more smoothly spread open the curved plate and pass through.

[0017] Furthermore, the food guiding component includes several transmission rods, each with a pulley rotatably fitted at one end. A guide groove is provided on the arc-shaped plate adjacent to the pulley for the pulley to slide on, and the pulley slides in contact with the guide groove. An L-shaped support plate is fixedly connected to the bracket, and a bait box is fixedly connected to the other end of the L-shaped support plate. Several slide rails are fixedly connected to the outer wall of the bait box, and several sliders are slidably fitted onto each slide rail. The other end of each slider located on the same slide rail is fixedly connected to its adjacent transmission rod. A baffle is fixedly connected to the side wall of the slider closest to the bait box, and a second spring is fixedly connected to the side wall of the slider furthest from the bait box. The other end of each second spring is fixedly connected to the end of the slide rail furthest from the bait box.

[0018] Beneficial effects: By using a transmission rod to synchronize the opening and closing of the baffle with the opening and closing of the arc plate, the bait is accurately fed to the fish entering the measurement area, attracting them to continue to complete the measurement process. This not only guides the measurement but also avoids waste caused by indiscriminate baiting.

[0019] Furthermore, the heat guiding assembly includes several heating rings fixedly connected to the outer wall of the fish passage tube. The heating rings are electrically connected to the controller. An array of temperature sensors for detecting the gradient temperature signal inside the fish passage tube is fixedly connected along the axial direction to the inner wall of the fish passage tube. The array of temperature sensors transmits the gradient temperature signal to the controller.

[0020] Beneficial effects: The heating ring gradually raises the temperature of the water in the fish passage tube along the direction of the fish's movement, which matches the temperature-seeking behavior of the amberjack and enhances the active guidance effect on the fish. The array temperature sensor provides real-time feedback on the temperature gradient in the fish passage tube, and the controller can dynamically adjust the power of the heating ring to ensure that the temperature gradient is stable and controllable, avoiding stress to the fish or guidance failure due to excessively high water temperature or gradient disorder.

[0021] Furthermore, the deformation sensor, controller, roller encoder, heating ring, and array temperature sensor are all selected with an IP68 waterproof rating.

[0022] Beneficial effects: The IP68 waterproof rating provides deep waterproofing, corrosion protection, and protection against mud and sand intrusion, making it suitable for the humid and impurity-rich environment of aquaculture waters. It effectively reduces damage to electronic components caused by water ingress and corrosion, ensures the stability and reliability of the device during long-term underwater operation, reduces measurement interruptions caused by component failures, and lowers maintenance frequency and costs.

[0023] Furthermore, a method for collecting vital sign data of amberjack used in aquaculture includes the following steps: Step 1, Device Deployment: Fill the slow-release feed into the feed box, then install the device in the fish's swimming path in the aquaculture area, and activate the heat guiding component to make the water temperature in the fish passage tube rise in a step-like manner along the direction of the fish's movement.

[0024] Step 2, Data Acquisition: When the amberjack initially pushes the arc-shaped plate, its body expands the outlet formed by the end of the arc-shaped plate away from the fish tube. The transmission rod drives the slider to open the baffle, releasing the slow-release bait in the bait box, attracting the amberjack to continue passing through. The deformation sensor detects the radial displacement of the arc-shaped plate, and the roller encoder detects the number of rotations of the roller. The controller then calculates the amberjack's vital signs data.

[0025] Beneficial effects: The deployment of standardized devices ensures the initial guidance effect. When the high-body amberjack comes into contact with the arc plate, the release of slow-release feed increases the amberjack's enthusiasm for passing through the measurement components. Overall, it achieves efficient, stable and sustainable collection of vital signs data, which is suitable for the standardized management needs of large-scale aquaculture.

[0026] Furthermore, in step two, the displacement data of the two symmetrical arc plates away from the end of the fish tube are calculated by geometric relationship and the absolute values ​​are added together to obtain a set of cross-sectional lengths. After statistical analysis of multiple sets of cross-sectional lengths, the maximum peak value is taken as the width of the high-body amberjack and the second largest peak value is taken as the height of the high-body amberjack.

[0027] Beneficial effects: Fish may pass at different angles, and because the amberjack has a wide and flat body, this method can effectively eliminate interference from slight swaying or micro-adjustment of the fish's posture, thus improving the accuracy of identifying and measuring the width and height of the amberjack.

[0028] Furthermore, in step two, when the controller receives the pulse signal from the roller encoder, a preset interruption threshold of 500-1000ms is set. When the interruption time of the continuous pulse signal exceeds this interruption threshold, it is judged as the end and recorded as a group of pulse signals. Each group of pulse signals corresponds to one individual amberjack. The total number of pulse signals in a group is divided by the number of pulses per rotation to obtain the number of rotations in that group, and then multiplied by the circumference of the roller to obtain the body length of the corresponding amberjack.

[0029] Beneficial effects: By setting a pulse interruption threshold, the measurement cycle of a single fish can be accurately identified, avoiding data confusion when multiple fish pass by continuously, and ensuring that the body length data of each fish is independent and accurate; the pulse signal conversion method is direct and accurate, without the need for complex algorithms, which reduces the difficulty and cost of data processing and improves the consistency of body length measurement. Attached Figure Description

[0030] Figure 1 This is a frontal axonometric view of an embodiment of the fish vital signs data collection device for aquaculture of high-body yellowtail of the present invention.

[0031] Figure 2 This is a side view axonometric drawing of an embodiment of the fish vital signs data collection device for aquaculture of high-body yellowtail of the present invention.

[0032] Figure 3 for Figure 2 Enlarged view of part A in the middle.

[0033] Figure 4 This is a cross-sectional view of an embodiment of the fish vital signs data collection device for aquaculture of high-body yellowtail of the present invention.

[0034] Figure 5 This is a step diagram illustrating an embodiment of the method for collecting vital signs data of amberjack used in aquaculture according to the present invention.

[0035] The reference numerals in the accompanying drawings of the instruction manual include: 1. Fish passage tube; 2. Arc plate; 3. Support rod; 4. Bracket; 5. Fixing plate; 6. First spring; 7. Folding tube; 8. L-shaped support plate; 9. Bait box; 10. Slide rail; 11. Slider; 12. Transmission rod; 13. Pulley; 14. Roller; 15. Heating ring; 16. Baffle. Detailed Implementation

[0036] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] The following detailed description illustrates the specific implementation methods: Example 1: As attached Figure 1 As shown: A device for collecting vital signs data of amberjack aquaculture includes a fish passage tube 1, one end of which is provided with a radial measuring component for measuring the body width and body height of amberjack; a frame component for providing support is sleeved on the outside of the fish passage tube 1.

[0040] like Figure 1 and Figure 4 As shown, the radial measurement assembly includes several arc-shaped plates 2 hinged to one end of the fish passage tube 1. The ends of the arc-shaped plates 2 away from the fish passage tube 1 form an outlet. A first spring 6 is welded to the outer side of each arc-shaped plate 2. A deformation sensor for detecting the deformation of the first spring 6 is glued to the middle side surface of each first spring 6. The deformation sensor is electrically connected to a controller. A fixing plate 5 is welded to the other end of each first spring 6. A folded tube 7 is sleeved on the outer side of each first spring 6. One end of each folded tube 7 is bolted to the arc-shaped plate 2, and the other end of each folded tube 7 is bolted to its adjacent fixing plate 5.

[0041] The fixing plates 5 are all welded to the frame assembly. The frame assembly includes the bracket 4 and several support rods 3 welded to the outer wall of the fish passage tube 1. The other end of each support rod 3 is welded to the bracket 4. The fixing plates 5 are all welded to the bracket 4.

[0042] Specifically, such as Figure 4 As shown, the fish enters the device from the right end of the fish-passing tube 1 and exits from the outlet formed by the arc-shaped plate 2. During this process, the fish pushes the arc-shaped plate 2 to open, and the arc-shaped plate 2 cooperates with the fixed plate 5 to compress the first spring 6. The deformation sensor collects the deformation signal of the first spring 6 and sends it to the controller. The controller calculates the maximum diameter change of the outlet formed by the arc-shaped plate 2 based on the deformation of the first spring 6. By adding this change to the initial diameter, the maximum diameter of the outlet when the fish passes through can be obtained, thereby calculating the height and width of the fish. After the fish passes through, the arc-shaped plate 2 is pushed back to its original position by the first spring 6; the folding tube 7 is compressed and restored along with the first spring 6 during this process.

[0043] like Figure 1 As shown, the end of the arc plate 2 away from the fish passage tube 1 is provided with an axial measuring component for measuring the length of the amberjack body. The axial measuring component includes several rollers 14. The end of the arc plate 2 away from the fish passage tube 1 is rotatably engaged with the adjacent rollers 14. The rollers 14 and the axle of the rollers 14 rotatably engaged with the arc plate 2 are bolted to a roller encoder for converting the rotation signal of the rollers 14 into an electrical pulse signal. The roller encoder transmits the electrical pulse signal to the controller.

[0044] Specifically, when the fish passes through the arc plate 2, the arc plate 2 is always in contact with the surface of the fish due to the action of the first spring 6. The roller 14 rotates due to the friction of the fish. When the roller 14 rotates, the roller encoder generates an electrical pulse signal. The controller calculates the length of the fish based on this signal and reduces the measurement error by integrating the data generated by multiple rollers 14 at the same time.

[0045] like Figure 2 and Figure 3 As shown, a food guiding component for guiding high-bodied amberjack with food is provided on one side of the frame assembly. The food guiding component includes several transmission rods 12, one end of each transmission rod 12 is rotatably fitted with a pulley 13, and the arc-shaped plate 2 adjacent to the pulley 13 is provided with a guide groove for the pulley 13 to slide. The pulley 13 is slidably fitted with the guide groove. An L-shaped support plate 8 is welded to the bracket 4, and a bait box 9 is bolted to the other end of the L-shaped support plate 8. Several slide rails 10 are bolted to the outer wall of the bait box 9, and several sliders 11 are slidably fitted to each slide rail 10. The other end of each slider 11 located on the same slide rail 10 is bolted to its adjacent transmission rod 12. The side wall of the slider 11 close to the bait box 9 is bolted with a baffle 16, and the side wall of the slider 11 away from the bait box 9 is welded with a second spring. The other end of each second spring is welded to the slide rail 10.

[0046] Specifically, several sliders 11 in the same slide rail 10 guide the adjacent transmission rods 12, causing the transmission rods 12 to reciprocate along the slide rail 10 following the sliders 11. In the initial state, the sliders 11 are pushed by the second spring towards the bait box 9, causing the adjacent baffles 16 to move closer together to close the bait box 9. The second spring's push on the sliders 11 is transmitted to the pulley 13 through the transmission rods 12, causing the pulley 13 to press tightly against the arc-shaped plate 2. Figure 2 As shown, when the fish slightly pushes the arc-shaped plate 2, the outlet formed by the arc-shaped plate 2 will be expanded. The upper and lower pulleys 13 will be pushed by the arc-shaped plate 2, which will drive the upper and lower transmission rods 12 to move up and down respectively. As a result, the sliders 11 in the upper and lower slide rails 10 will slide away from the bait box 9. The sliders 11 will also drive the baffle 16 to move, thereby opening the bait box 9 and exposing the slow-release bait inside the bait box 9 to attract the fish's attention. The greater the degree of pushing, the greater the degree of exposure of the slow-release bait, making the fish more active in passing through.

[0047] like Figure 2 As shown, a heat guiding assembly for guiding high-body amberjack through a heat source is fitted on the outer side of the fish passage tube 1. The heat guiding assembly includes several heating rings 15 bolted to the outer wall of the fish passage tube 1. The heating rings 15 are electrically connected to the controller. An array temperature sensor for detecting the gradient temperature signal inside the fish passage tube 1 is bolted along the axial direction to the inner wall of the fish passage tube 1. The array temperature sensor transmits the gradient temperature signal to the controller. The deformation sensor, controller, roller encoder, heating rings 15, and array temperature sensor are all IP68 waterproof rated models.

[0048] Specifically, the controller controls the heating power of each heating ring 15 based on the gradient temperature signal. Starting from the end of the fish passage tube 1 away from the arc plate 2, the controller uses the current water temperature as the starting temperature and heats the water in the fish passage tube 1 evenly towards the end closer to the arc plate 2, forming a uniform temperature gradient. The amberjack is a warm-water migratory fish, and according to its thermotropic behavior, setting this temperature gradient can guide it to pass through the fish passage tube 1 better.

[0049] This invention, by setting up radial and axial measurement components, synchronously collects three-dimensional vital signs data of amberjack, enabling uninterrupted collection of amberjack vital signs data in aquaculture waters without the need for sample capture, thus reducing fish stress. Because the deformation sensor and roller encoder are unaffected by light, high-precision measurements can be maintained even in turbid water environments or when the fish are swimming. In conjunction with heat guiding and food guiding components, the invention further enhances the fish's willingness to pass through the device, improving measurement efficiency.

[0050] Example 2: As attached Figure 5As shown, the difference from Example 1 is that a method for collecting vital signs data of amberjack for aquaculture includes the following steps: Step 1, Device Deployment: Fill the slow-release feed into the feed box 9, and then install the device in the fish's swimming path in the aquaculture area. Activate the heat guiding component to make the water temperature in the fish passage tube 1 rise in a stepwise manner along the direction of the fish's movement.

[0051] Step 2, data collection: When the amberjack initially pushes the arc plate 2, the fish body expands the outlet formed by the end of the arc plate 2 away from the fish tube 1. The pulley 13 slides along the guide groove and drives the slider 11 to slide away from the bait box 9 through the transmission rod 12, thereby driving the baffle 16 to open, releasing the slow-release bait in the bait box 9, attracting the amberjack to continue to pass through.

[0052] The radial displacement of the arc plate 2 is detected by a deformation sensor, and the number of rotations of the roller 14 is detected by a roller encoder. The controller is then used to calculate the physical characteristics of the amberjack. The displacement data of the two symmetrical arc plates 2 away from the end of the fish tube 1 are calculated by geometric relationship and the absolute values ​​are added together to obtain a set of cross-sectional lengths. After statistical analysis of multiple sets of cross-sectional lengths, the maximum peak value is taken as the width of the amberjack and the second largest peak value is taken as the height of the amberjack.

[0053] When the controller receives the pulse signal from the roller encoder, it presets an interruption threshold of 500-1000ms. When the interruption time of the continuous pulse signal exceeds this interruption threshold, it is judged as the end and recorded as a group of pulse signals. Each group of pulse signals corresponds to one individual amberjack. The total number of pulse signals in a group is divided by the number of pulses per rotation to obtain the number of rotations in that group. Then, it is multiplied by the circumference of the roller to obtain the length of the corresponding amberjack.

[0054] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A fish body sign data collection device for high body tuna farming, characterized by, The fish passing pipe (1) is provided with a radial measurement assembly for measuring the body width and body height of the high body shark at one end, and a frame assembly for providing support is sleeved outside the fish passing pipe (1); The radial measurement assembly comprises a plurality of arc-shaped plates (2) hinged at one end of the fish passing pipe (1), the plurality of arc-shaped plates (2) constitute an outlet away from the one end of the fish passing pipe (1), the arc-shaped plates (2) are all fixedly connected with first springs (6) outside, the middle side surfaces of the first springs (6) are all fixedly connected with deformation sensors for detecting the deformation amount of the first springs (6), the deformation sensors are electrically connected with a controller, the other ends of the first springs (6) are all fixedly connected with fixed plates (5), and the fixed plates (5) are all fixedly connected with the frame assembly. The arc-shaped plates (2) are provided with an axial measurement assembly for measuring the body length of the high body shark away from the one end of the fish passing pipe (1), one side of the frame assembly is provided with a food guiding assembly for guiding the high body shark with food, and a heat guiding assembly for guiding the high body shark with a heat source is sleeved outside the fish passing pipe (1).

2. The high body gilthead seabream farming fish body sign data collection device according to claim 1, characterized in that, The frame assembly comprises a plurality of supporting rods (3) fixedly connected with the fish passing pipe (1) outside the wall, the other ends of the supporting rods (3) are all fixedly connected with a support (4), and the fixed plates (5) are all fixedly connected with the support (4).

3. The high body gilthead seabream farming fish body sign data collection device according to claim 2, characterized in that, The first springs (6) are all sleeved with folding pipes (7) outside, one ends of the folding pipes (7) are all fixedly connected with the arc-shaped plates (2), and the other ends of the folding pipes (7) are all fixedly connected with the fixed plates (5) adjacent thereto.

4. The fish body sign data collection device for high body cobia farming according to claim 3, characterized by, The axial measurement assembly comprises a plurality of rollers (14), the arc-shaped plates (2) are all rotationally matched with the rollers (14) adjacent thereto away from the one end of the fish passing pipe (1), a roller encoder for converting a roller rotation signal into an electric pulse signal is fixedly connected on the wheel shaft of the roller (14) rotationally matched with the arc-shaped plate (2), and the roller encoder transmits the electric pulse signal to the controller.

5. The fish sign data collection device for high body cobia farming according to claim 4, characterized by, The food guiding assembly comprises a plurality of transmission rods (12), one ends of the transmission rods (12) are all rotationally matched with pulleys (13), the arc-shaped plates (2) adjacent to the pulleys (13) are all provided with guide grooves for sliding of the pulleys (13), and the pulleys (13) are all slidingly matched with the guide grooves; the support (4) is fixedly connected with an L-shaped supporting plate (8), the other end of the L-shaped supporting plate (8) is fixedly connected with a bait box (9), outer side walls of the bait box (9) are fixedly connected with a plurality of sliding rails (10), the sliding rails (10) are all slidingly matched with a plurality of sliding blocks (11), the other ends of the sliding blocks (11) located in the same sliding rail (10) are all fixedly connected with the transmission rods (12) adjacent thereto, the side walls of the sliding blocks (11) close to the bait box (9) are all fixedly connected with baffles (16), the side walls of the sliding blocks (11) away from the bait box (9) are all fixedly connected with second springs, and the other ends of the second springs are all fixedly connected with the sliding rails (10) away from the bait box (9).

6. The fish sign data collection device for high body gurnard farming according to claim 5, wherein The heat guiding assembly comprises a plurality of heating rings (15) fixedly connected with the outer side wall of the fish passing pipe (1), the heating rings (15) are electrically connected with the controller, an array temperature sensor for detecting a gradient temperature signal in the fish passing pipe (1) is fixedly connected to the inner side wall of the fish passing pipe (1) in the axial direction, and the array temperature sensor transmits the gradient temperature signal to the controller.

7. The high body gilthead seabream farming fish body sign data collection device according to claim 6, characterized in that, The deformation sensor, the controller, the roller encoder, the heating ring (15) and the array temperature sensor are all IP68 waterproof level models.

8. A method for collecting fish body sign data for high body tuna farming, characterized by, The method comprises the following steps: Step one, device deployment: fill the slow-release bait into the bait box (9), then install the device on the fish cruising path in the breeding water area, start the heat guide assembly, and make the water temperature in the fish pipe (1) rise in steps along the direction of fish body movement; Step two, data collection: when the high body grouper initially pushes the arc-shaped plate (2), the fish body will expand the outlet formed by the end of the arc-shaped plate (2) away from the fish pipe (1), the transmission rod (12) will drive the sliding block (11) to open the baffle (16), release the slow-release bait in the bait box (9), attract the high body grouper to continue passing through, use the deformation sensor to detect the displacement of the arc-shaped plate (2) in the radial direction, and use the roller encoder to detect the number of rotations of the roller (14), so as to use the controller to calculate the physical data of the high body grouper.

9. The fish sign data collection method for high body gurnard farming according to claim 8, characterized by, In step two, the displacement data of the two symmetric arc-shaped plates (2) away from the end of the fish pipe (1) are calculated through geometric relationship and the absolute values are added to obtain a group of section lengths, and after a plurality of groups of section lengths are counted, the maximum peak value is taken as the body width of the high body grouper and the second largest peak value is taken as the body height of the high body grouper.

10. The fish sign data collection method for high body gummy shark farming according to claim 9, characterized by, In step two, when the controller receives the pulse signal of the roller encoder, the preset interrupt threshold is 500-1000 ms, when the continuous pulse signal interrupt time exceeds the interrupt threshold, it is judged to be ended, and it is recorded as a group of pulse signals, each group of pulse signals corresponds to an individual high body grouper, the total number of pulse signals in each group is divided by the number of pulses per rotation to obtain the number of rotations in this group, and then multiplied by the circumference of the roller (14) to obtain the body length of the high body grouper corresponding to this group.

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