An artificial reef for fish sonar monitoring

Abstract

This utility model belongs to the field of ecological fisheries engineering technology, specifically disclosing an artificial reef for fish sonar monitoring, including a reef body, sonar equipment, buoys, and a signal transceiver. The reef body is a hollow, multi-faceted structure with an open bottom to insert seabed sediment for enhanced stability. The top and side walls are equipped with signal transmission / reception holes and perforations for sonar signal transmission and reception and to promote seawater circulation. The sonar equipment is fixed in a mounting slot on the central partition of the reef body, including a sonar housing and an integrated sonar transceiver, transducer, and relay. The buoy is connected to the sonar equipment and signal transceiver via a transmission line, forming an "underwater detection-surface transmission" system. The signal transceiver integrates a 4G module and a solar power supply system, supporting real-time data transmission and self-powered operation and maintenance. This utility model breaks through the limitations of traditional single-function artificial reefs, combining ecological restoration and intelligent monitoring capabilities, providing a new solution for marine ranching resource assessment and dynamic management.

Description

Technical Field

[0001] This utility model relates to the field of ecological fishery engineering technology, and in particular to an artificial reef for fish sonar monitoring. Background Technology

[0002] In recent years, marine ranching, as an environmentally friendly resource conservation model, has developed rapidly in my country. Its core objective is to achieve the conservation of fishery resources, the restoration of the marine ecological environment, and the sustainable development of fisheries by constructing suitable artificial habitats (referring to biological living environments formed through human intervention and modification). Artificial reefs, as a fundamental component of marine ranching construction, play a crucial role. Artificial reefs are structures placed in the ocean by humans, and their main function is to provide marine life with places for growth, reproduction, foraging, and refuge from predators.

[0003] However, with the advent of the intelligent era, the traditional research approach to artificial reefs, which only focuses on ecological benefits, can no longer meet the needs of current marine fisheries development. Modern marine resource management urgently needs to build a complete technological system covering "ecological restoration, resource monitoring, and intelligent management," and the research and development of intelligent artificial reefs is becoming a key breakthrough in this field.

[0004] Currently, by embedding sonar monitoring systems into artificial reef structures, it is possible to accurately perceive and continuously track the dynamics of fish schools around the reef. This smart reef, integrating acoustic sensors, can collect key data such as fish species and numbers around the clock, effectively overcoming the functional limitations of traditional artificial reefs that merely serve as habitats. The acquired real-time dynamic information is transmitted to a management platform via IoT technology, providing a scientific basis for fisheries resource assessment and enabling big data analysis to predict trends in biodiversity within marine ranches, thus achieving a paradigm shift from passive restoration to proactive regulation. This technological integration marks the transformation and upgrading of artificial reefs from "ecological carriers" to "smart nodes," opening new pathways for the digital management of marine ranches, precise conservation of fisheries resources, and dynamic early warning of ecosystems. Utility Model Content

[0005] The purpose of this invention is to provide an artificial reef for fish sonar monitoring, which solves the technical problems of traditional artificial reefs in fish monitoring, sustainable operation and maintenance and multi-functional integration. By integrating artificial reefs with sonar monitoring systems, an intelligent infrastructure for marine ranches that combines fish aggregation, ecological restoration and dynamic monitoring can be constructed.

[0006] To achieve the above objectives, this utility model provides the following solution: an artificial reef for fish sonar monitoring, comprising:

[0007] The reef is a hollow polyhedral structure with an open bottom. A central partition is connected to the inner wall at a certain height from the bottom opening. A sonar mounting slot is fixed to the center of the upper part of the central partition. Signal transceiver holes are opened on the top center and the surrounding walls of the reef.

[0008] The sonar equipment, fixed in the sonar mounting slot, includes a sonar mounting compartment and a sonar transceiver, transducer and relay integrated therein, the transducer protruding from the periphery and the center of the top of the sonar mounting compartment.

[0009] The buoy is connected to the sonar device via a first transmission line;

[0010] The signal transceiver is connected to the buoy via a second transmission line.

[0011] The aforementioned structure aims to propose an artificial reef for fish sonar monitoring. By integrating sonar equipment into the artificial reef, it enables precise perception and continuous tracking of the dynamics of fish schools around the reef. This breaks through the functional limitations of traditional artificial reefs, which are merely biological habitat carriers, and provides real-time data support for fishery resource assessment and marine ranching management.

[0012] Furthermore, the reef is a cubic structure made of cast concrete, measuring 300cm × 300cm × 300cm, with a wall thickness of 15cm. Its open bottom design allows for the insertion of seabed sediment to enhance stability. The use of a cast concrete cubic structure, along with its dimensions and wall thickness, enhances the reef's stability and durability, enabling it to withstand external forces such as waves, tides, and typhoons in the marine environment, thus extending its service life.

[0013] Furthermore, a first signal transceiver hole with a diameter of 150cm is opened at the center of the top of the reef, and second signal transceiver holes with a diameter of 120cm are opened on the surrounding side walls. The design of the signal transceiver holes at the center of the top and on the surrounding side walls optimizes the transmission and reception path of sonar signals, while increasing the permeability of the reef, which helps the flow of marine life and ocean currents and reduces the impact of sediment deposition on sonar equipment.

[0014] Furthermore, the edge of the first signal transceiver hole is wrapped with a rubber layer to effectively protect the first transmission line from frictional damage, thereby improving the system's reliability and service life.

[0015] Furthermore, the central partition has multiple perforated sections evenly distributed around the sonar mounting slot; the four sidewalls of the reef, located below the central partition, have multiple first perforated sections; both the perforated sections and the first perforated sections are circular holes with a diameter of 40 cm. The perforated design on the central partition and sidewalls further increases the reef's permeability, promotes seawater circulation, and helps to blow away silt and sediment from the sonar equipment, ensuring its normal operation.

[0016] Furthermore, at least one square second hollow section is formed on the side wall below the first hollow section. The design of the second hollow section is used to fix the reef, and by filling it with seabed mud and sand, it enhances the stability of the reef in soft seabed areas and effectively resists the impact of ocean currents caused by extreme weather.

[0017] Furthermore, the sonar mounting cabin is a sealed stainless steel chamber with dimensions of 60cm × 60cm × 60cm. The transducer transmits sonar signals via multi-beams, with each beam having a detection range of 5°. The stainless steel sealed chamber design and the multi-beam transducer enhance the corrosion resistance and detection accuracy of the sonar equipment, enabling comprehensive, high-resolution fish monitoring.

[0018] Furthermore, the end of the first transmission line is connected to the sonar equipment and the buoy via a watertight connector; the end of the second transmission line is connected to the signal transceiver and the buoy via a watertight connector. The use of watertight connectors ensures a tight and waterproof connection between the sonar equipment and the buoy, and between the buoy and the signal transceiver, thereby improving the reliability and stability of the system.

[0019] Furthermore, the first and second transmission lines are wrapped with a carbon fiber reinforcement layer and a polyurethane outer layer, and the internal conductors have a redundant twisted design with a length reserved for 20% to 30% of the actual distance, forming a relaxed S-shaped bend. The transmission lines wrapped with a carbon fiber reinforcement layer and a polyurethane outer layer, as well as the redundant twisted design and reserved length, enhance the tensile strength and durability of the transmission lines, while avoiding the problem of transmission line breakage caused by ocean currents.

[0020] Furthermore, the transceiver integrates a 4G data transmission module and a lithium battery, and is externally connected to a solar panel, which is electrically connected to the lithium battery. The inclusion of the lithium battery and solar panel enables the system to be self-powered and transmit data in real time, reducing maintenance costs and improving the system's independence and reliability.

[0021] Compared with the prior art, the present invention discloses at least the following beneficial effects:

[0022] This invention relates to an artificial reef that integrates sonar equipment to achieve real-time monitoring of fish populations, overcoming the limitations of traditional reefs that merely serve as habitats. This provides precise data support for marine ranching management. The reef employs a multi-faceted structure with an open bottom for inserting seabed sediment to enhance stability, while a perforated design increases permeability and reduces the impact of sediment deposition on the equipment. The sonar equipment utilizes a stainless steel sealed housing and multi-beam transmission technology to improve detection accuracy and corrosion resistance. The transmission lines use high-strength materials and redundant design to prevent breakage due to ocean currents. The transceiver integrates a 4G module and solar panels, enabling self-powered operation and real-time data transmission, reducing maintenance costs. The overall design enhances the intelligence level of the artificial reef, providing a cost-effective technical solution for the digital management of marine ranches and the precise conservation of fishery resources. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the artificial reef in Embodiment 1 of this utility model;

[0025] Figure 2 This is a front view of the reef in Embodiment 1 of this utility model;

[0026] Figure 3 This is a top view of the reef in Embodiment 1 of this utility model;

[0027] Figure 4 This is a bottom view of the reef in Embodiment 1 of this utility model;

[0028] Figure 5 This is an isometric view of the reef in Embodiment 1 of this utility model;

[0029] Figure 6 This is a cross-sectional view of the reef in Embodiment 1 of this utility model;

[0030] Figure 7 This is a schematic diagram showing the positional relationship of the sonar equipment placed inside the reef in Embodiment 1 of this utility model;

[0031] Figure 8 This is a front view of the sonar device in Embodiment 1 of this utility model;

[0032] Figure 9 This is a schematic diagram of the structure of the artificial reef in Embodiment 2 of this utility model;

[0033] Figure 10 This is a cross-sectional view of the reef in Embodiment 2 of this utility model;

[0034] Figure 11 This is a technical block diagram of the artificial reef of this utility model used for real-time monitoring of the dynamics of surrounding marine life.

[0035] In the diagram: 1. Reef; 11. Second signal transceiver port; 12. First hollow section; 13. Second hollow section; 14. First signal transceiver port; 15. Sonar mounting slot; 16. Intermediate partition; 17. Partition hollow section; 2. Sonar equipment; 21. Sonar mounting compartment; 22. Transducer; 3. Signal transceiver; 4. Buoy; 5. First transmission line; 6. Second transmission line. Detailed Implementation

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

[0037] Artificial reefs are considered a fundamental component of marine ranching. They are man-made structures placed in the ocean to provide habitats for target species to grow, reproduce, forage, and avoid predators. With the continuous development of fisheries demands, artificial reefs have evolved into various shapes, such as square, triangular, trapezoidal, cross-shaped, boat-shaped, irregularly shaped, and composite reefs. The target species they attract have also gradually increased, including artificial reefs for abalone, sea cucumber, algae, and marine delicacies.

[0038] Traditional artificial reefs serve only as habitats for organisms, offering limited functionality and failing to meet the demands of intelligent development in marine fisheries. They suffer from technical limitations in fish dynamic monitoring, sustainable operation and maintenance, and multifunctional integration, unable to acquire real-time fish population dynamics information, and incurring high maintenance costs. Therefore, this application aims to address the shortcomings of traditional artificial reefs in fish monitoring, sustainable operation and maintenance, and multifunctional integration by integrating a sonar monitoring system to achieve precise perception and continuous tracking of fish dynamics around the reef, thereby enhancing the reef's level of intelligence.

[0039] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Example 1

[0041] Reference Figures 1 to 8As shown, Embodiment 1 of this utility model provides an artificial reef for sonar monitoring of fish. The artificial reef is a square structure, including a reef body 1. The reef body 1 has an internal hollow structure, with a first signal transceiver hole 14 at the center of its top, an open bottom, and a central partition 16 at its height. A sonar mounting groove 15 is fixed above the central part of the central partition 16 for mounting a sonar device 2. Multiple partition hollow sections 17 are formed around the sonar mounting groove 15 on the central partition 16. Second signal transceiver holes 11 are formed on the upper half of the reef body 1's four side walls located on the central partition 16. Multiple first hollow sections 12 are formed on the side walls located below the central partition 16. Two square second hollow sections 13 are formed on the side walls below the first hollow sections 12. The sonar device 2 is fixedly connected within the sonar mounting slot 15. The sonar device 2 includes a sonar mounting compartment 21 and a sonar transceiver, transducer 22, and relay integrated within the sonar mounting compartment 21. The transducer 22 protrudes from the sonar mounting compartment 21, with its protruding portion located around the perimeter and at the center of the top of the sonar mounting compartment 21. The sonar mounting compartment 21 is connected to a buoy 4 via a first transmission line 5. The buoy 4 is then connected to a signal transceiver 3 via a second transmission line 6. The signal transceiver 3 integrates a 4G data transmission module and a lithium battery. A solar panel is externally connected to the signal transceiver 3 to convert solar energy into electrical energy for storage in the lithium battery. Watertight connectors are used at the interfaces between the above components to ensure a tight connection and waterproofing.

[0042] The artificial reefs described above, while taking into account the ecological benefits of traditional artificial reefs, such as generating upwelling and back eddy current zones and providing habitats for marine life, can also monitor the quantity and activity of surrounding fish and benthic organisms in real time, and send the data to the shore-based control center for scientific research and policy-making activities.

[0043] In one specific embodiment, the artificial reef uses a 300cm × 300cm × 300cm square concrete structure as reef body 1. High-strength concrete is used for casting, ensuring the reef can withstand the effects of waves, tides, typhoons, and other external forces in the marine environment, thereby improving its stability and durability. Furthermore, the corrosion resistance of concrete allows the reef to be used in seawater for extended periods without being easily eroded by environmental factors. The hollow design at the bottom of reef body 1 further enhances its deployment stability and durability in soft seabed areas by utilizing the filling properties of seabed sediment.

[0044] In this embodiment, the first signal transceiver port 14 on the reef 1 and the second signal transceiver port 11 on the side are used for transmitting and receiving sonar signals and increasing the permeability of the reef 1. At the same time, the first hollow part 12 and the partition hollow part 17 can further increase the permeability of the reef 1, allowing marine life and ocean currents to circulate. The flowing seawater can blow away the mud and some sediment on the sonar placement chamber, ensuring the normal operation of the sonar. The second hollow part 13 at the bottom of the reef 1 is used to fix the reef 1. The bottom of the reef 1 is designed to be inserted into the seabed mud and sand. The mud and sand can be filled into the reef 1 through the rectangular opening of the second hollow part 13, further improving the stability of the reef 1 and effectively withstanding the impact of ocean currents caused by extreme weather such as typhoons. At the same time, after the bottom is inserted with mud and sand, the reef 1 can effectively reduce the sinking speed of the reef 1 through the friction with the deep mud and sand, extending the service life of the reef 1.

[0045] In one specific embodiment, the wall thickness of the reef 1 is 15cm, the diameter of the first signal transceiver hole 14 at the top of the reef 1 is 150cm, the diameter of the second signal transceiver hole 11 is 120cm, there are four first hollow parts 12 arranged horizontally at equal intervals, each of the first hollow parts 12 has a diameter of 40cm, the length × width of the second hollow part 13 is 110cm × 40cm, the partition hollow parts 17 on the middle partition 16 are arranged in a square array around the sonar mounting slot 15, the center distance between two adjacent partition hollow parts 17 is 85cm, the diameter of each partition hollow part 17 is 40cm, the inner dimension of the sonar mounting slot 15 is 60×60cm, and the outer dimension is 70×70cm.

[0046] In one specific embodiment, the sonar mounting compartment 21 is made of stainless steel, with external dimensions of 60cm × 60cm × 60cm, which matches the internal dimensions of the sonar mounting slot 15. The sonar mounting compartment 21 is entirely made of stainless steel, possessing good corrosion resistance and strength, and its completely sealed body prevents seawater infiltration, protecting the internal equipment. The sonar transceiver and relays are installed inside the sonar mounting compartment 21, and transducers 22 are installed around and above the compartment for emitting sound waves. An interface is provided on the outside of the sonar mounting compartment 21, which is connected to the first transmission line 5 via a watertight connector, ensuring that seawater will not leak and thus affect signal and energy transmission.

[0047] In the above embodiment, a high-frequency multi-beam sonar device 2 is embedded inside the reef 1. Specifically, the sonar mounting compartment 21 can be connected to the sonar mounting slot 15 by drilling and threading, or it can be fixedly connected to the sonar mounting slot 15 in other ways. The sonar device 2 can emit sonar beams in all directions and above the reef 1 through relays and five transducers 22. Each beam has a detection range of about 5°. The sonar signal is connected to the surface buoy 4 through a watertight transmission line (first transmission line 5). The buoy 4 is then connected to the signal transceiver 3, forming a directional monitoring system of "underwater detection to surface transmission". At the same time, this multi-segment connection method can effectively avoid the problem of the signal transceiver 3 being submerged below the water surface due to the ebb and flow of tides, greatly improving the stability of signal transmission. The buoy 4 can also play a role in positioning the artificial reef. The signal transceiver 3 integrates a solar panel, a 4G data transmission module and a lithium battery. It uses photovoltaic power to maintain the operation of the entire system and can transmit the fish echo data collected by the sonar back to the shore-based control center in real time without additional wiring. This specialized design, which eliminates redundancy, reduces the difficulty of operation and maintenance while ensuring the reliability of core functions.

[0048] In one specific embodiment, to prevent the transmission lines from breaking due to ocean currents or severe weather, the first transmission line 5 and the second transmission line 6 use high-strength fiber materials such as carbon fiber as internal reinforcement layers, which can effectively resist the impact of ocean currents. The outer layer can be wrapped with wear-resistant and corrosion-resistant polymers such as polyurethane to improve durability and reduce water flow resistance. The internal conductors can adopt a redundant stranded design, allowing a certain amount of stretching without affecting signal transmission. In addition, different sections of the transmission line adopt differentiated strength designs. The two ends of the connecting equipment are reinforced with double-layer fiber wrapping to enhance tensile strength, while the middle part remains flexible to distribute stress. The transmission line is reserved with a length 20% to 30% longer than the actual distance, so that it naturally forms a relaxed S-shaped bend. In this way, when pulled by ocean currents, the excess line length can release tension first, avoiding direct tautness. The edge of the first signal transceiver hole 14 at the top of the reef 1 is wrapped with a rubber layer to prevent the transmission line from being damaged due to long-term friction with the first transmission line 5.

[0049] Example 2

[0050] Reference Figure 9 and Figure 10As shown, Embodiment 2 of this utility model provides another artificial reef for fish sonar monitoring. The artificial reef uses a hexagonal prism concrete structure with a side length of 300cm as the reef body 1. The reef body 1 includes a top surface and six vertical surfaces, and its cross-section is a regular hexagon. The structure is basically the same as that of Embodiment 1. The bottom of the reef body 1 is open, and a central partition is connected to the inner wall at a certain height from the bottom opening. A sonar mounting slot 15 is fixed to the center of the upper part of the central partition. A first signal transceiver hole 14 is opened in the center of the top of the reef body 1, and a second signal transceiver hole 11 is opened on the six sides. Correspondingly, the sonar device 2 has transducers 22 corresponding to the first signal transceiver hole 14 and the six second signal transceiver holes 11. Three first hollow parts 12 are also opened on the six side walls of the reef body 1, and two second hollow parts 13 penetrating the bottom edge of the reef body 1 are opened on the side wall below the first hollow parts 12, which makes it easier for the reef body 1 to be inserted into the mud and sand on the seabed. The central partition has a sonar mounting groove 15 and partition cutouts 17 evenly distributed around its perimeter.

[0051] In this embodiment, the purpose of setting each signal transceiver hole and the hollow part is the same as in embodiment 1. The size setting can also refer to embodiment 1, or be reasonably adjusted according to actual needs. For the parts not described in detail in embodiment 2, please refer to embodiment 1, and will not be repeated here.

[0052] The process of using artificial reefs in the two embodiments described above for real-time monitoring of the dynamics of surrounding marine life is as follows: Figure 11 As shown.

[0053] It should be understood that, in practical applications, before the artificial reef is put into use, the entire reef 1 needs to undergo thorough performance testing in a laboratory, and each signal transmission device needs to be adjusted. This process not only ensures the normal operation of all equipment and clear signal transmission, but also optimizes the overall performance of the system to achieve the best monitoring results.

[0054] After commissioning, the artificial reefs are systematically and strategically deployed to the target sea area. The deployment process is tailored to the characteristics of the marine environment, fish habitats, and the needs of the ecosystem, maximizing the ecological benefits of the artificial reefs. Before deployment, hydrological and seabed data of the deployment area are investigated and analyzed using GPS, sonar mapping, and underwater surveys to determine the deployment location coordinates. The artificial reef deployment is carried out during the closed fishing season, which offers advantages in terms of vessel and personnel availability and public awareness. Deployment is also conducted when sea conditions are relatively calm. The artificial reefs are transported to the ship using a crane. Once the ship reaches the planned deployment area, the surface buoys 4, signal transceivers 3, and the second transmission line 6 are deployed and positioned for positioning. After a second check of the sonar equipment 2, the reef 1 is slowly lowered into the sea using the ship's crane. Shipboard personnel and divers work together to adjust the reef's orientation and the stability of the transmission line to prevent tangling. Once deployment is complete and the reef has been confirmed to be firmly on the bottom, all personnel return. It is important to note that when deploying the artificial reef, the directionality of the reef must be ensured so that the sonar can effectively monitor the movement of fish around and above the reef.

[0055] During post-deployment operation and maintenance, organisms such as barnacles and shellfish may attach to the sonar installation cabin 21, affecting the effectiveness of the sonar equipment 2. Regular checks of the equipment's operation and removal of attached organisms are necessary to ensure its stability and effectiveness. A database can be established as needed to store collected historical data, facilitating data analysis and ecological assessment by research institutions and academic research teams.

[0056] After acquiring raw sonar data, rigorous data preprocessing is required, including eliminating environmental noise interference using techniques such as wavelet transform, and standardizing monitoring data from different time periods and regions to ensure the reliability of subsequent analyses. Researchers can quantify fish biomass using sonar echo intensity inversion technology, establishing a three-dimensional density distribution model to visually represent the spatial distribution pattern of fish around artificial reefs. By combining the regression relationship between acoustic target intensity and body length, the size composition of individuals within the population can be inferred. To verify the accuracy of sonar estimation results, simultaneous trawling sampling experiments can be conducted. By establishing a regression relationship between acoustic intensity and measured catch, the model parameters can be continuously optimized, which is of great significance for assessing resource replenishment. Sonar monitoring data can be combined with other ecological survey data to construct a multi-dimensional assessment system. By calculating the biodiversity index, the effect of artificial reefs on species richness can be quantitatively evaluated; using ecosystem models such as Ecopath, the trophic cascade effects and energy flow changes brought about by reef construction can be revealed; and using habitat suitability models, the ecological effectiveness of reefs under different environmental conditions can be predicted. These analyses provide a scientific basis for understanding the functional positioning of artificial reefs in marine ecosystems. Meanwhile, the accumulation of long-term monitoring data makes trend analysis possible. Through time series modeling methods, interannual fluctuations in fish populations can be identified, the impacts of factors such as climate change and human activities can be assessed, and data support can be provided for the development of targeted management measures.

[0057] Traditional artificial reef ecological benefit assessments primarily rely on indicators such as biomass attachment and catch volume. This method requires on-site operations at sea, which is not only time-consuming and labor-intensive but also incurrs high maintenance costs. In contrast, the artificial reef in this embodiment utilizes sonar technology to achieve real-time monitoring of ecosystem biomass. This innovative technology can accurately acquire ecological data without requiring on-site operations at sea, significantly reducing maintenance costs and improving monitoring efficiency.

[0058] The design concept of the artificial reef in this embodiment focuses on highlighting core functions and intensively integrating auxiliary systems. This not only optimizes resource allocation but also improves overall efficiency. It provides a cost-effective technological paradigm for the intelligent construction of marine ranches and opens up new paths for marine ecological protection and sustainable fisheries development.

[0059] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 this utility model.

[0060] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An artificial reef for fish sonar monitoring, characterized in that, include: The reef (1) is a hollow polyhedral structure with an open bottom. A central partition is connected to the inner wall at a certain height from the bottom opening. A sonar mounting slot (15) is fixed to the center above the central partition. Signal transceiver holes are opened on the top center and the surrounding walls of the reef (1). The sonar device (2) is fixed in the sonar mounting slot (15) and includes a sonar mounting compartment (21) and a sonar transceiver, transducer (22) and relay integrated therein. The transducer (22) protrudes from the periphery and the center of the top of the sonar mounting compartment (21). The buoy (4) is connected to the sonar device (2) via the first transmission line (5); The signal transceiver (3) is connected to the buoy (4) via the second transmission line (6).

2. The artificial reef for fish sonar monitoring according to claim 1, characterized in that, The reef (1) is a cubic structure made of concrete, with dimensions of 300cm×300cm×300cm and a wall thickness of 15cm. The bottom is designed to be open for inserting seabed mud and sand to enhance stability.

3. The artificial reef for fish sonar monitoring according to claim 2, characterized in that, The reef (1) has a first signal transceiver hole (14) with a diameter of 150 cm at the center of its top, and a second signal transceiver hole (11) with a diameter of 120 cm on its four side walls.

4. The artificial reef for fish sonar monitoring according to claim 3, characterized in that, The edge of the first signal transceiver hole (14) is wrapped with a rubber layer to protect the first transmission line (5) from friction damage.

5. The artificial reef for fish sonar monitoring according to claim 2, characterized in that, The central partition has multiple partition cutouts (17) evenly distributed around the sonar mounting slot (15); the four sides of the reef (1) are provided with multiple first cutouts (12) located below the central partition; both the partition cutouts (17) and the first cutouts (12) are circular holes with a diameter of 40cm.

6. The artificial reef for fish sonar monitoring according to claim 5, characterized in that, At least one square second hollow part (13) is opened on the side wall below the first hollow part (12).

7. The artificial reef for fish sonar monitoring according to claim 1, characterized in that, The sonar mounting cabin (21) is a stainless steel sealed cabin with dimensions of 60cm×60cm×60cm. The transducer (22) transmits sonar signals through multiple beams, with each beam having a detection range of 5°.

8. The artificial reef for fish sonar monitoring according to claim 1, characterized in that, The end of the first transmission line (5) is connected to the sonar device (2) and the buoy (4) via a watertight connector; the end of the second transmission line (6) is connected to the signal transceiver (3) and the buoy (4) via a watertight connector.

9. The artificial reef for fish sonar monitoring according to claim 1, characterized in that, The first transmission line (5) and the second transmission line (6) are wrapped with a carbon fiber reinforcement layer and a polyurethane outer layer. The internal conductors are redundantly twisted and the length is reserved for 20% to 30% of the actual distance, forming a relaxed S-shaped bend.

10. The artificial reef for fish sonar monitoring according to claim 1, characterized in that, The transceiver (3) integrates a 4G data transmission module and a lithium battery, and is connected to an external solar panel. The solar panel is electrically connected to the lithium battery.

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