Intelligent opening and closing anti-escape cage

Abstract

This utility model discloses an intelligent escape-proof cage, relating to the field of fishery fishing equipment technology. It includes an escape-proof cage frame and an escape-proof net covering the frame. A fish-attracting channel extending into the cage is provided on the net. The fish-inlet end of the channel is larger than the fish-outlet end, and the fish-outlet end connects to a fish inlet on the cage. A fish-attracting light is installed at the inlet. An automatic door is located on the side of the inlet inside the cage, connected to the drive output of a control unit. The cage also includes an image acquisition and processing unit for real-time monitoring of the fish's condition inside. This utility model uses visual recognition technology to determine whether the fish inside the cage tend to leave through the inlet. When it is determined that a fish will leave through the inlet, the control unit automatically closes the door, sealing the inlet and preventing the fish from escaping.

Description

Technical Field

[0001] This utility model relates to the field of fishing equipment technology, and in particular to an intelligent opening and closing anti-escape cage. Background Technology

[0002] Escape prevention facilities are primarily used in high-density aquaculture scenarios, such as pond-based recirculating aquaculture systems and nearshore cage aquaculture, as well as in ecological monitoring scenarios for water conservancy projects, such as fishway monitoring and migration channel protection. Their core functions include: 1. Preventing biological escape and ensuring economic benefits: In high-density aquaculture, escape prevention facilities effectively reduce fish and shrimp escapes due to environmental changes, food shortages, or facility vulnerabilities through physical barriers (such as escape-proof nets and calcium-plastic boards) and intelligent monitoring systems. 2. Protecting the ecological environment and preventing species invasion: Escape prevention facilities prevent farmed species from escaping into natural waters and causing ecological damage through physical isolation and ecological regulation. 3. Assisting ecological monitoring and data collection: The combination of escape prevention facilities and intelligent monitoring technology provides real-time data support for ecological research and management.

[0003] When escape prevention facilities are applied in ecological monitoring scenarios of water conservancy projects, efficient escape prevention measures are a key factor in determining the monitoring effect. However, current fish collection devices mostly rely on unidirectional barbs or gravity gate structures. The barbs may injure small fish or juveniles, and they cannot distinguish the fish's intention to enter or exit. Furthermore, fish are prone to escaping in the opposite direction when impacted by water flow or startled. The related facilities have simple structures, and the efficiency of fish entry is limited by the direction of water flow, and the coordination among multiple units is poor. Mechanically triggered escape prevention devices lack dynamic monitoring of fish behavior and cannot accurately trigger escape prevention actions. Utility Model Content

[0004] The purpose of this invention is to provide an intelligent escape-proof cage that solves the problems existing in the prior art. It uses visual recognition technology to determine whether the fish inside the cage tends to leave through the inlet. When it determines that a fish is about to leave, the control unit automatically closes the door, sealing the inlet and preventing the fish from escaping. Visual recognition can make the judgment when the fish is far from the inlet; when the automatic door closes, the fish has not yet reached the inlet, avoiding injury to the fish during the closing process.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model provides an intelligent escape-proof cage, comprising an escape-proof cage frame and an escape-proof net covering the frame. The escape-proof net has a fish-attracting channel extending towards the interior of the cage. The fish-attracting channel's inlet end is larger than its outlet end, and the outlet end communicates with a fish inlet in the cage. A fish-attracting light is installed at the inlet, and an automatic door is located on the side of the inlet inside the cage. The automatic door is connected to the drive output of a control unit. The escape-proof cage also includes an image acquisition and processing unit for real-time monitoring of the fish's condition inside.

[0007] In one embodiment, the image acquisition and processing unit supports the YOLOv5 target detection algorithm.

[0008] In one embodiment, the image acquisition and processing unit is positioned directly above the automatic door, and the recognition angle of the image acquisition and processing unit is 90 degrees to 150 degrees.

[0009] In one embodiment, the escape-proof cage has a cuboid structure, and the fish-attracting channel is located on one side of the escape-proof cage.

[0010] In one embodiment, the fish-attracting channel is an isosceles trapezoid in the vertical orthographic projection and in the horizontal orthographic projection.

[0011] In one embodiment, the fish-attracting lamp has a light emission angle of 90 degrees to 180 degrees, and the light from the fish-attracting lamp is directed towards the fish-attracting channel.

[0012] In one embodiment, the wavelength of the fish-attracting lamp is 520 nm to 530 nm, and the luminous flux of the fish-attracting lamp is greater than or equal to 9000 lumens.

[0013] In one embodiment, the automatic door is a double door, comprising two opposing door panels, and the material of the automatic door is stainless steel.

[0014] In one embodiment, the drive output end of the control unit is a gear, and the automatic door is provided with a gear that meshes with the drive output end of the control unit.

[0015] In one embodiment, the escape-proof net has a double-layer structure, and the mesh size of the escape-proof net is 5 mm to 10 mm.

[0016] The present invention achieves the following technical advantages over the prior art:

[0017] This invention provides an intelligent escape-proof cage that uses visual recognition technology to determine if fish inside the cage tend to leave through the inlet. When this is detected, the control unit automatically closes the door, sealing the inlet and preventing the fish from escaping. Visual recognition can detect fish when they are far from the inlet, ensuring the door closes before the fish reach it, thus avoiding injury during the closing process. The inlet of the fish-attracting channel is larger than the outlet, causing the fish to move forward in a more concentrated pattern as they enter the channel. The fish are guided forward by the push from the rear, thus guiding the fish into the cage. A fish-attracting light further enhances the attraction. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the external structure of an escape-proof cage according to an embodiment of the present utility model;

[0020] Figure 2 This is a cross-sectional view of the internal structure of an escape-proof cage according to an embodiment of the present invention.

[0021] The components include: 1. Escape-proof cage; 2. Fish inlet; 3. Fish-attracting light; 4. Automatic door; 5. Control unit; and 6. Image acquisition and processing unit. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the implementation of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed herein. In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are merely 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. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Therefore, features specified with "first," "second," etc., may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0024] It should also be noted that in the embodiments of this application, the same reference numerals are used to denote the same component or the same part.

[0025] The purpose of this invention is to provide an intelligent escape-proof cage that solves the problems existing in the prior art. It uses visual recognition technology to determine whether the fish inside the cage tends to leave through the inlet. When it determines that a fish is about to leave, the control unit automatically closes the door, sealing the inlet and preventing the fish from escaping. Visual recognition can make the judgment when the fish is far from the inlet; when the automatic door closes, the fish has not yet reached the inlet, avoiding injury to the fish during the closing process.

[0026] 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.

[0027] Example 1

[0028] like Figure 1 and Figure 2As shown, this utility model provides an intelligent opening and closing escape-proof cage, including an escape-proof cage 1. The escape-proof cage 1 includes an escape-proof cage frame and an escape-proof net covering the escape-proof cage frame. A fish-attracting channel is provided on the escape-proof net, extending towards the inside of the escape-proof cage 1. The size of the fish-attracting channel's inlet end is larger than the size of its outlet end. The fish-attracting channel's outlet end is connected to a fish inlet 2 opened on the escape-proof cage 1. A fish-attracting light 3 is provided on the fish inlet 2. An automatic door 4 is provided on the side of the fish inlet 2 located inside the escape-proof cage 1. The automatic door 4 is connected to the drive output end of a control unit 5. The escape-proof cage 1 is also provided with an image acquisition and processing unit 6 for real-time monitoring of the fish status inside the escape-proof cage 1.

[0029] Working principle:

[0030] I. Fish Attraction Stage

[0031] Keep the automatic door 4 open and turn on the fish-attracting light 3 to attract the fish. The fish enter the fish-attracting channel. Because the size of the fish-attracting channel's inlet end is larger than the size of the fish-attracting channel's outlet end, the fish at the front of the fish group will be constantly pushed forward by the fish behind and will not be able to turn around. The entire fish group will then continuously enter the escape-proof cage 1.

[0032] II. Monitoring Phase

[0033] The image acquisition and processing unit 6 monitors the fish's status in real time, especially its lingering and abnormal swimming movements, and identifies escape risks through background separation technology. Specifically, it uses the direction of the fish's head and the distance between the fish's head and the inlet 2 as the basis for judgment. When the fish's head is facing the inlet 2 and the straight-line distance between the fish's head and the inlet 2 is less than the detection threshold, an alarm is triggered and a control command is generated. Upon receiving the command, the control unit 5 drives the automatic door 4 to close, cutting off the connection between the inlet 2 and the outside world, preventing the fish from escaping from the escape-proof cage 1. The detection threshold is determined by comparing the closing time and the time it takes for the fish to swim normally from the detection threshold position to the inlet 2. That is, when the automatic door 4 is closed, the fish will not swim to the inlet 2, avoiding injury or being pinched or bumped by the automatic door 4.

[0034] In one implementation, the detection threshold is 0.3 meters.

[0035] In one implementation, the image acquisition and processing unit 6 employs a SONY IMX178 image sensor. The SONY IMX178 image sensor has a 1 / 1.8-inch target surface, approximately 6.44 million effective pixels, and a single pixel size of 2.4μm × 2.4μm. The large pixel size of the SONY IMX178 image sensor (compared to typical CMOS sensors) allows for greater light intake per pixel, enabling clear images even in low-light underwater environments, providing reliable basic data for image analysis. It is understood that the image acquisition and processing unit 6 can also use image sensors from other brands and models. For image analysis, the image acquisition and processing unit 6 supports the YOLOv5 object detection algorithm. YOLOv5 is the fifth generation of the YOLO (You Only Look Once) series of single-stage object detection algorithms and is one of the most popular algorithms in the current field of computer vision. Its core design concept is end-to-end real-time detection. Through a lightweight network structure and engineering optimization, it improves accuracy while maintaining detection speed, making it suitable for mobile devices and edge computing scenarios. The YOLOv5 algorithm requires no secondary programming; simply importing data, configuring the adaptation task, and training are sufficient to acquire the specified functionality. In this invention, YOLOv5 can separate the target fish image from the background and perform edge computing unit processing on the target fish image to obtain the target fish's head orientation and the precise distance between the target fish and the inlet 2. It is understood that the image acquisition and processing unit 6 can employ other algorithms capable of visual recognition.

[0036] In one embodiment, the image acquisition and processing unit 6 is positioned directly above the automatic door 4, with its camera angle pointing downwards. The recognition angle of the image acquisition and processing unit 6 is 90 to 150 degrees. The recognition range of the image acquisition and processing unit 6 only needs to effectively cover the detection threshold area; an excessively large detection range would result in too much information being collected, consuming too much processing resources of the image acquisition and processing unit 6. The optimal recognition angle of the image acquisition and processing unit 6 is 120 degrees.

[0037] In one embodiment, the escape-proof cage 1 has a cuboid structure, and the fish-attracting channel is located on one side of the escape-proof cage 1. The escape-proof cages 1 can be used in combination, and the cuboid structure facilitates stacking and combination, so that multiple escape-proof cages 1 can be combined into a more closely connected whole structure.

[0038] In one embodiment, the fish-attracting channel is an isosceles trapezoid in both its vertical and horizontal orthographic projections. The inner wall of the channel has no protrusions or depressions, and the overall transition is smooth, allowing the fish to flow more smoothly. It is understood that the three-dimensional structure of the fish-attracting channel can be a frustum or a truncated cone.

[0039] In one embodiment, the fish-attracting lamp 3 has a light emission angle of 90 degrees to 180 degrees, and the light from the fish-attracting lamp 3 is directed towards the fish-attracting channel. The light from the fish-attracting lamp 3 needs to be directional to prevent the light from entering the escape-proof cage 1.

[0040] In one embodiment, the fish-attracting lamp 3 emits light at a wavelength of 520 nm to 530 nm, and its luminous flux is greater than or equal to 9000 lumens. Aquatic organisms exhibit selective perception of light waves; their retinal photoreceptor cells are most sensitive to green light in the 450 nm to 550 nm range, making it more likely to trigger phototaxis than other colors of light. This invention selects green light with a wavelength of 520 nm to 530 nm as the fish-attracting light source, achieving a good fish-attracting effect. A luminous flux of at least 9000 lumens ensures sufficient propagation distance of the light underwater.

[0041] In one embodiment, the fish-attracting lamp 3 has an IP68 dustproof and waterproof rating and supports 36V DC power supply.

[0042] In one embodiment, a bait feeder is provided on the outside of the escape-proof cage 1. The bait feeder releases fish-attracting bait that can attract fish to the escape-proof cage 1. After the fish approach the escape-proof cage 1, they will be attracted by the fish-attracting light 3.

[0043] In one embodiment, the automatic door 4 is a double-leaf door, comprising two oppositely arranged door panels, and the material of the automatic door 4 is stainless steel. In a double-leaf door, the movement distance of a single door panel is half the total movement distance, resulting in a short movement time and meeting the need for rapid response. It is understood that the automatic door 4 can also be other forms of structures capable of automatic opening and closing.

[0044] In one embodiment, the drive output of the control unit 5 is a gear, and the automatic door 4 is provided with a gear that meshes with the drive output of the control unit 5. It is understood that the drive output of the control unit 5 can also be other structures capable of driving the automatic door 4 to open and close.

[0045] In one design, the escape-prevention net has a double-layer structure with mesh sizes ranging from 5 mm to 10 mm. The mesh sizes of the two layers of escape-prevention net are staggered.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is obviously impossible to use an integral forming process).

[0048] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0049] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0050] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0051] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An intelligent opening and closing escape-proof cage, characterized in that: The system includes an escape-proof cage (1), which includes an escape-proof cage frame and an escape-proof net covering the escape-proof cage frame. The escape-proof net is provided with a fish-attracting channel extending toward the interior of the escape-proof cage (1). The size of the fish-attracting channel's inlet end is larger than the size of the fish-attracting channel's outlet end. The fish-attracting channel's outlet end is connected to a fish inlet (2) opened on the escape-proof cage (1). The fish inlet (2) is equipped with a fish-attracting lamp (3), and an automatic door (4) is provided on one side of the fish inlet (2) inside the escape-proof cage (1). The automatic door (4) is connected to the drive output terminal of the control unit (5). The escape-proof cage (1) is also equipped with an image acquisition and processing unit (6) for real-time monitoring of the fish status inside the escape-proof cage (1).

2. The intelligent opening and closing anti-escape cage according to claim 1, characterized in that: The image acquisition and processing unit (6) supports the YOLOv5 target detection algorithm.

3. The intelligent opening and closing anti-escape cage according to claim 1, characterized in that: The image acquisition and processing unit (6) is located directly above the automatic door (4), and the recognition angle of the image acquisition and processing unit (6) is 90 degrees to 150 degrees.

4. The intelligent opening and closing escape-proof cage according to claim 1, characterized in that: The escape-proof cage (1) has a rectangular structure, and the fish-attracting channel is located on one side of the escape-proof cage (1).

5. The intelligent opening and closing anti-escape cage according to claim 1, characterized in that: The fish-attracting channel is an isosceles trapezoid in both its vertical and horizontal cross-sectional orthographic projections.

6. The intelligent opening and closing anti-escape cage according to claim 1, characterized in that: The light-emitting angle of the fish-attracting lamp (3) is 90 degrees to 180 degrees, and the light of the fish-attracting lamp (3) is directed toward the fish-attracting channel.

7. The intelligent opening and closing anti-escape cage according to claim 1, characterized in that: The wavelength of the fish-attracting lamp (3) is 520 nm to 530 nm, and the luminous flux of the fish-attracting lamp (3) is greater than or equal to 9000 lumens.

8. The intelligent opening and closing anti-escape cage according to claim 1, characterized in that: The automatic door (4) is a double door, and the automatic door (4) includes two door panels arranged opposite each other. The material of the automatic door (4) is stainless steel.

9. The intelligent opening and closing anti-escape cage according to claim 1, characterized in that: The drive output end of the control unit (5) is a gear, and the automatic door (4) is provided with a gear that meshes with the drive output end of the control unit (5).

10. The intelligent opening and closing anti-escape cage according to claim 1, characterized in that: The escape-proof net has a double-layer structure, and the mesh size of the escape-proof net is 5 mm to 10 mm.

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