Integrated fish migration channel monitoring equipment

Abstract

The utility model discloses integrated fish migration channel monitoring equipment which comprises a channel shell, a flow velocity detector is arranged at the inlet end of the channel shell, an elastic expansion shell is fixed to the inner wall of the channel shell, a channel is conical after the elastic expansion shell expands, and a mounting plate and a lifting support are arranged at the top of the flow velocity detector. A capturing box and a moving mechanism are arranged at the outlet end of the channel shell, a light supplementing lamp belt and an outlet collecting piece are arranged at the position close to the outlet end of the channel shell, the light supplementing lamp belt is located on the bottom face in the channel shell, and the outlet collecting piece is located on the top face in the channel shell. The flow velocity detector at the inlet end can detect the velocity of water flowing into the channel shell, when the flow velocity exceeds a threshold value, the inflator pump is automatically triggered to enable the elastic expansion shell to form a conical contraction structure, the elastic expansion shell is matched to effectively slow down the flow velocity to a suitable range, and definition and integrity of image acquisition are ensured.

Description

Technical Field

[0001] This utility model relates to the field of fish migration monitoring technology, specifically an integrated fish migration channel monitoring device. Background Technology

[0002] Fish migration channel monitoring equipment refers to fishways with monitoring functions. A fishway is an artificial water channel for fish to migrate through sluice gates or dams. It is a remedial measure taken when human activities have damaged fish migration channels. Generally, artificial water channels are built on sluice gates or dams to protect the habits of fish. Fishway monitoring equipment uses technologies such as cameras to record and distinguish the number and species of fish passing through the fishway, and analyzes the number and species of fish.

[0003] In the prior art, a fish passage monitoring device is disclosed in patent publication number "CN211773440U"; belonging to the technical field of fish passage monitoring equipment; its key technical points include a fish passage body, a support block fixedly connected to the upper surface of the fish passage body, a rotary motor fixedly connected to the upper surface of the support block; a threaded rod fixedly connected to the output end of the rotary motor through a coupling, an L-shaped support frame fixedly connected to the upper surface of the support block, and the end of the threaded rod away from the rotary motor being rotatably connected to the lower surface of the horizontal part of the L-shaped support frame through a bearing; a threaded cylinder is threadedly connected to the outer wall of the threaded rod, an L-shaped push rod is fixedly connected to the side wall of the threaded cylinder, and a camera is fixedly connected to the bottom end of the vertical part of the L-shaped push rod; this utility model can effectively improve the clarity of the camera, thereby facilitating accurate counting of the number of fish passing through the fish passage body, and also facilitating the use of the camera to count the number of fish passing through the glass channel.

[0004] However, existing technologies still have significant shortcomings. Traditional fish migration channel monitoring equipment usually requires the addition of flow velocity detectors in a separate location outside the equipment. Moreover, most of the probes of flow velocity detectors are fixed and submerged in water for a long time, making them susceptible to corrosion by biological attachment. The measurement accuracy decreases rapidly over time, and it is difficult to accurately capture images of fish passing through the equipment when the water flow is too fast. Utility Model Content

[0005] The purpose of this invention is to provide an integrated fish migration channel monitoring device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an integrated fish migration channel monitoring device, comprising a channel shell, a flow velocity detector at the inlet end of the channel shell, an elastic expansion shell fixed to the inner wall of the channel shell, and the channel shape after the elastic expansion shell expands into a cone shape, a mounting plate and a lifting bracket respectively provided on the top of the flow velocity detector, a capture box and a moving mechanism respectively provided at the outlet end of the channel shell, a supplementary light strip and an outlet collection device provided near the outlet end of the channel shell, the supplementary light strip being located on the bottom surface inside the channel shell, and the outlet collection device being located on the top surface inside the channel shell.

[0007] As can be seen, in the above technical solution, the flow rate detector at the inlet end can detect the flow rate of water entering the channel shell. When the flow rate exceeds the threshold, it automatically triggers the air pump to make the elastic expansion shell form a conical contraction structure. In conjunction with the elastic expansion shell, it effectively slows down the flow rate to a suitable range, ensuring the clarity and integrity of the image acquisition.

[0008] Preferably, an air pump is connected to the air inlet of the elastic expansion shell, and the air pump is bolted to the side of the channel shell.

[0009] As can be seen, in the above technical solution, the inflation method is to expand the elastic expansion shell to change the shape of the channel.

[0010] Preferably, the mounting plate is welded to the top surface of the inlet end of the channel housing, and the lifting bracket includes a sliding rod, which is located inside the sliding opening of the mounting plate.

[0011] As can be seen, in the above technical solution, the mounting plate is used to connect the sliding rod of the lifting bracket, which can ensure that the lifting bracket can move up and down on the mounting plate.

[0012] Preferably, the top surface of the mounting plate is bolted with a cylinder, and the telescopic end of the cylinder is connected to the top surface of the flow rate detector.

[0013] As can be seen, in the above technical solution, the cylinder can control the height of the flow rate detector and, with the help of the lifting bracket, ensure that the flow rate detector can be raised and lowered vertically.

[0014] Preferably, a data acquisition box is fixed to the top and side of the channel housing, and a data acquisition camera is installed inside the data acquisition box.

[0015] As can be seen, in the above technical solution, the acquisition cameras on the top and sides of the channel shell can capture fish images from all directions, and combine with intelligent analysis algorithms to automatically count key data such as the number, type and size of fish.

[0016] Preferably, the moving mechanism includes a lead screw and a limiting rod, and the two sides of the capture box are fixed with moving connecting rods, and the connecting ends of the moving connecting rods are all sleeved on the surfaces of the lead screw and the limiting rod, and the connecting ends of the moving connecting rods are threadedly connected to the surface of the lead screw.

[0017] As can be seen, in the above technical solution, the lifting and lowering action of the capture box is precisely controlled by the screw mechanism, and when it descends, it aligns with the channel outlet to form a closed capture area.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] The system utilizes cameras on the top and sides of the channel housing to capture fish images from all angles. A flow velocity detector at the inlet detects the water velocity entering the channel housing. When the velocity exceeds a threshold, an air pump is automatically triggered, causing the elastic expansion shell to form a conical contraction structure. This effectively slows the flow velocity to a suitable range, ensuring clear and complete image acquisition. Direct contact between the detector and the water flow provides the most accurate flow velocity data, avoiding interference from surface fluctuations or boundary layer effects. The lifting mechanism allows the detector to be raised above the water surface during non-detection periods, preventing biofouling and material corrosion caused by prolonged immersion. It also eliminates physical obstruction to fish migration and automatically adjusts the probe depth according to water level changes. Furthermore, the flow velocity detector and capture box are integrated into the same channel housing, enhancing stability and operational efficiency without requiring additional separate water flow detection and capture equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0021] Figure 2 This is a perspective view of the present utility model;

[0022] Figure 3 This is a side view of the present invention;

[0023] Figure 4 This is a schematic diagram of the movement of the capture box of this utility model;

[0024] Figure 5 This is a schematic diagram of the interior of the channel shell of this utility model.

[0025] In the diagram: 1. Channel housing; 2. Mounting plate; 3. Lifting bracket; 31. Sliding rod; 4. Cylinder; 5. Flow rate detector; 6. Data acquisition box; 7. Data acquisition camera; 8. Moving mechanism; 81. Lead screw; 82. Limiting rod; 83. Moving connecting rod; 9. Capture box; 10. Elastic expansion shell; 11. Air pump; 12. Supplemental lighting strip; 13. Exit data acquisition component. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-5 This utility model provides a technical solution:

[0028] Example 1: An integrated fish migration channel monitoring device: It includes a channel housing 1, with acquisition boxes 6 fixed to the top and sides of the channel housing 1. Acquisition cameras 7 are installed inside the acquisition boxes 6. The channel housing 1 is the outer shell of the detection device, and acquisition boxes 6 are located on both the top and sides of the channel housing 1. After fish enter through the entrance of the channel housing 1, images of the fish passing through are collected using the acquisition cameras 7 at different positions. The system analyzes the size, quantity, and species of the fish based on the collected images. Since fish need to migrate to spawn during their life cycle... Fish are highly sensitive to changes in water quality, especially migratory fish that spawn. They require clean and suitable water conditions to spawn successfully. The number of fish passing through can indicate the quality of the upstream water. The acquisition camera system 7 on the top and sides of the channel shell 1 can capture images of fish from all directions. Combined with intelligent analysis algorithms, it automatically counts key data such as the number, species, and size of fish, providing a scientific basis for water quality assessment. A flow velocity detector 5 is installed at the inlet of the channel shell 1. An elastic expansion shell 10 is fixed to the inner wall of the channel shell 1, and the channel shape after the elastic expansion shell 10 expands is determined by the expansion shell. The conical, elastic expansion shell 10 has an air inlet connected to an air pump 11, which is bolted to the side of the channel shell 1. The inlet and outlet ends of the channel shell 1 integrate a water flow detector and a fish trap 9, respectively, enabling the device to simultaneously detect flow velocity and trap fish. It is worth noting that the flow velocity detector 5 is an ultrasonic Doppler detector. The detector's probe is immersed in water, emitting high-frequency ultrasonic waves and receiving reflected signals. Using a flow velocity calculation formula, the flow velocity entering the channel shell 1 can be detected, and the flow velocity is digitally processed. Converting this to numerical values, when the water flow rate is high during use, fish may pass through the channel shell 1 too quickly, making it difficult for the acquisition camera 7 to accurately capture image information of the passing fish. Therefore, a flow rate detector 5 is added to periodically detect the flow rate of water entering the channel shell 1. When the detected value exceeds the set threshold, the air pump 11 can be activated to inflate the elastic expansion shell 10, making the channel inside the channel shell 1 form a cone shape. With the expansion of the elastic expansion shell 10, the flow rate of water can be greatly reduced, thereby improving the quality of data acquisition by the acquisition camera 7.

[0029] The air pump 11 is located on the side of the channel housing 1, and its air inlet is connected to the air inlet of the elastic expansion shell 10. A valve can be added as needed. After the air pump 11 is powered on, the elastic expansion shell 10 can be inflated to change the shape of the channel inside the channel housing 1, thereby achieving a slow flow effect. When compressed air is injected into the inner cavity of the shell made of elastic material such as TPU or silicone, the shell expands radially, reducing the cross-sectional area of ​​the channel and lowering the flow rate. The tapered gradient design guides the water flow to transition smoothly and avoids turbulence. The surface of the expanded shell forms a smooth contraction section, which not only extends the passage time of fish by physically blocking the flow, but also does not cause mechanical damage to the fish due to its flexible material properties. The PLC accurately controls the inflation volume based on the real-time data of the ultrasonic flow velocity detector 5 and dynamically adjusts the contraction ratio to adapt to different flow rate conditions. Depending on different needs, the air-inflating expansion can be replaced with water-filling.

[0030] Example 2:

[0031] In this embodiment, the top of the flow rate detector 5 is provided with a mounting plate 2 and a lifting bracket 3. The mounting plate 2 is welded to the top surface of the inlet end of the channel housing 1. The lifting bracket 3 includes a sliding rod 31, which is located inside the sliding opening of the mounting plate 2. A cylinder 4 is bolted to the top surface of the mounting plate 2, and the extension end of the cylinder 4 is connected to the top surface of the flow rate detector 5. It is worth noting that the flow rate detector 5 is connected to the mounting plate 2 through the lifting bracket 3. The movement of the extension end of the cylinder 4 is controlled by a PLC to realize the lifting and lowering of the flow rate detector 5. The sliding rod 31 on the lifting bracket 3 moves vertically up and down along the mounting hole of the mounting plate 2. The sliding rod 31 also acts as a lever for the lifting bracket 3. The probe acts as a limit switch, obtaining the most accurate flow velocity data through direct contact with the water flow, avoiding interference from water surface fluctuations or boundary layer effects. Meanwhile, high-frequency ultrasonic Doppler frequency shift detection relies on the scattering of sound waves by suspended particles in the water. Immersion measurement ensures signal strength. During non-detection periods, the probe is lifted out of the water surface, preventing biological attachment such as algae growth and material corrosion caused by long-term immersion, and eliminating physical obstacles to fish migration. The timed immersion detection mode balances data continuity and equipment lifespan. The precise lifting and lowering controlled by PLC can also automatically adjust the probe depth according to water level changes, ensuring that the mainstream flow velocity in the center of the channel is always measured under different hydrological conditions.

[0032] Example 3:

[0033] In this embodiment, a capture box 9 and a moving mechanism 8 are respectively provided at the outlet end of the channel shell 1. The capture box 9 is hollow inside, with its inlet aligned with the outlet of the channel shell 1, and multiple through holes running through its surface. The moving mechanism 8 can control the lifting and lowering of the capture box 9. When it is necessary to capture passing fish, the capture box 9 can be lowered to allow the fish to enter the capture box 9. At this time, since the surface contains filter holes, it will not affect the flow of water. After capture, the box immediately rises to keep the fish inside the capture box 9. Because the inlet of the capture box 9 is small, after the fish enters and the capture box 9 rises, the fish will leave the water and will be difficult to fall out of the capture box 9 on its own. At this time, personnel can quickly move to the scene to take out and check the captured fish, realizing the effect of automatic capture, thereby verifying the accuracy of the information collected by the acquisition camera 7. The moving mechanism 8 includes a lead screw 81 and a limit rod 82, and moving connecting rods are fixed on both sides of the capture box 9. 83, and the connecting ends of the moving link 83 are all sleeved on the surfaces of the lead screw 81 and the limiting rod 82, and the connecting ends of the moving link 83 are threadedly connected to the surface of the lead screw 81. It is necessary to explain that the moving mechanism 8 includes the lead screw 81 and the limiting rod 82. The lead screw 81 and the limiting rod 82 are installed at the installation positions on both sides of the channel housing 1. A motor is added to the lead screw 81 so that it can rotate. When the lead screw 81 rotates, the moving link 83 on both sides of the capture box 9 moves up and down on the surfaces of the lead screw 81 and the limiting rod 82 as the lead screw 81 rotates. The lifting and lowering action of the capture box 9 is precisely controlled by the lead screw 81 mechanism. When it descends, it aligns with the channel outlet to form a closed capture area. The surface through holes are used to maintain the water flow and avoid obstruction. When it rises, it quickly takes the fish out of the water and temporarily stores them. It not only ensures the integrity of the sample through physical isolation and facilitates manual inspection, but also verifies the recognition accuracy of the image acquisition system in real time. The limiting rod 82 ensures the stability of operation during the lifting and lowering process.

[0034] Near the exit end of the channel housing 1, there is a supplementary light strip 12 and an exit acquisition device 13. The supplementary light strip 12 is located on the bottom surface inside the channel housing 1, and the exit acquisition device 13 is located on the top surface inside the channel housing 1. The exit end of the channel housing 1 includes the supplementary light strip 12 and the exit acquisition device 13. The exit acquisition device 13 is also a camera. The supplementary light strip 12 can provide supplementary light for the swimming fish. The outer shell of the supplementary light strip 12 is a waterproof shell, and its interior is sealed to prevent water from entering the circuit. It can also be used to re-acquire and verify the image, and at the same time, it can be used to determine whether the capture was successful, which greatly improves the monitoring accuracy of the equipment.

[0035] Working principle: When fish enter from the channel entrance, the ultrasonic Doppler flow velocity detector 5 monitors the water flow speed in real time. If the flow velocity exceeds the threshold, the PLC immediately controls the air pump 11 to expand the elastic expansion shell 10 to form a conical structure, which effectively slows down the flow velocity and ensures that the high-definition cameras on the top and sides can clearly capture fish images and automatically analyze information such as species and quantity. The liftable capture box 9 at the outlet realizes the rapid capture and temporary storage of fish after leaving the water through the screw 81 mechanism. It works with the supplementary light strip 12 and the outlet camera for secondary verification. All modules are integrated into the same channel shell 1 and centrally controlled by the PLC.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated fish migration channel monitoring device, characterized in that: The system includes a channel housing (1), a flow rate detector (5) at the inlet end of the channel housing (1), an elastic expansion shell (10) fixed to the inner wall of the channel housing (1), and the channel shape after the elastic expansion shell (10) is expanded is conical. The top of the flow rate detector (5) is provided with a mounting plate (2) and a lifting bracket (3). The outlet end of the channel housing (1) is provided with a capture box (9) and a moving mechanism (8). Near the outlet end of the channel housing (1), a supplementary light strip (12) and an outlet collection device (13) are provided. The supplementary light strip (12) is located on the bottom surface inside the channel housing (1), and the outlet collection device (13) is located on the top surface inside the channel housing (1).

2. The integrated fish migration channel monitoring device according to claim 1, characterized in that: An air pump (11) is connected to the air inlet of the elastic expansion shell (10), and the air pump (11) is bolted to the side of the channel shell (1).

3. The integrated fish migration channel monitoring device according to claim 2, characterized in that: The mounting plate (2) is welded to the top surface of the inlet end of the outer shell, and the lifting bracket (3) includes a sliding rod (31), and the sliding rod (31) is located in the sliding opening of the mounting plate (2).

4. The integrated fish migration channel monitoring device according to claim 1, characterized in that: The top surface of the mounting plate (2) is bolted with a cylinder (4), and the telescopic end of the cylinder (4) is connected to the top surface of the flow rate detector (5).

5. The integrated fish migration channel monitoring device according to claim 1, characterized in that: The top and side surfaces of the channel housing (1) are respectively fixed with acquisition boxes (6), and acquisition cameras (7) are installed inside the acquisition boxes (6).

6. The integrated fish migration channel monitoring device according to claim 1, characterized in that: The moving mechanism (8) includes a lead screw (81) and a limiting rod (82). The two sides of the capture box (9) are fixed with moving connecting rods, and the connecting ends of the moving connecting rods are all sleeved on the surfaces of the lead screw (81) and the limiting rod (82). The connecting end of the moving connecting rod (83) is threadedly connected to the surface of the lead screw (81).

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