Underwater pipeline leakage detection device and method based on image recognition

Abstract

The invention provides an underwater pipeline leakage detection device and method based on image recognition, the underwater pipeline leakage detection device comprises a detection sleeve, the detection sleeve comprises an outer shell and an inner shell which are coaxially arranged, the outer shell is arranged on the outer side of the inner shell, and a sealed collection cavity is formed between the outer shell and the inner shell; the inner shell is made of a transparent material; an image acquisition assembly is arranged in the acquisition cavity and is used for acquiring a pipeline image and sending the pipeline image to a ground terminal for image recognition; the two end portions of the detection sleeve are respectively provided with a plugging assembly, and the plugging assemblies are used for opening or closing an opening between the end portion of the detection sleeve and the underwater pipeline. According to the underwater pipeline leakage detection device and method based on image recognition, water flow interference is effectively prevented, the collected clear pipeline image is used for image recognition processing, and the leakage detection accuracy is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of engineering detection based on image processing, and in particular relates to an underwater pipeline leakage detection device and method based on image recognition. Background Art

[0002] Underwater pipelines undertake critical tasks such as water supply, drainage, and oil and gas transportation. Over time, underwater pipelines are susceptible to varying degrees of damage from sand mining and water erosion, resulting in leaks of tap water, oil, and natural gas. Therefore, identifying and detecting underwater pipeline leaks is crucial for maintaining the normal operation of pipelines. Currently, there are two mature solutions. The first uses physical signals such as electromagnetic waves to inspect pipelines. By attaching magnets to the pipeline wall, the leak is identified based on changes in the magnetic field throughout the pipeline. The second uses optical imaging to inspect pipelines. Optical images of the underwater pipeline are captured and processed for image recognition to identify leaks. This solution is primarily used for inspecting underwater pipelines that do not require soil cover. Because optical images contain more information than physical signals such as electromagnetic waves, they can provide more accurate information about leakage and are more intuitive for leak detection in uncovered underwater pipelines. Consequently, underwater optical image inspection has gained increasing application. However, the complex underwater environment, particularly due to interference from water flow, can result in unclear optical images, which in turn affects the accuracy of leak detection. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an underwater pipeline leakage detection device and method based on image recognition, which can effectively prevent water flow interference, collect clear pipeline images for image recognition processing, and improve the accuracy of leakage detection.

[0004] To solve the above technical problems, in a first aspect, the present invention provides an underwater pipeline leakage detection device based on image recognition, comprising a detection sleeve, wherein the detection sleeve comprises an outer shell and an inner shell arranged coaxially, the outer shell being arranged on the outside of the inner shell, and a sealed collection chamber being formed between the outer shell and the inner shell; the inner shell is made of a transparent material; an image collection component is provided in the collection chamber for collecting pipeline images and sending them to a ground terminal for image recognition; sealing components are respectively provided at both end portions of the detection sleeve, and the sealing components are used to open or close the opening between the end of the detection sleeve and the underwater pipeline.

[0005] As a further improvement of the present invention, a rotatable wing plate is provided on the outer wall of the housing at the upstream end of the detection sleeve.

[0006] As a further improvement of the present invention, the sealing assembly includes an annular end plate arranged at the end of the detection sleeve, the inner ring diameter of the annular end plate is larger than the outer diameter of the underwater pipe and smaller than the inner diameter of the inner shell; an annular airbag is provided on the inner ring edge of the annular end plate.

[0007] As a further improvement of the present invention, a one-way valve is provided on the annular end plate of the blocking assembly arranged at the upstream end of the detection sleeve.

[0008] As a further improvement of the present invention, the wing plate is located below a cross-section passing through the axis of the detection sleeve and parallel to the horizontal plane, and the one-way valve is located above a cross-section passing through the axis of the detection sleeve and parallel to the horizontal plane.

[0009] As a further improvement of the present invention, the image acquisition component includes a camera, a rotating component and a moving component, the camera is mounted on the rotating component, the rotating component is mounted on the moving component, and the moving component is mounted on the inner wall of the outer shell.

[0010] In a second aspect, the present invention further provides an underwater pipeline leakage detection method based on image recognition, which uses the underwater pipeline leakage detection device based on image recognition provided in the first aspect; the detection method comprises: Step 10: The detection sleeve is placed on the underwater pipeline. After the detection sleeve moves along the underwater pipeline to the detection section, the sealing components at both ends of the detection sleeve close the opening between the end of the detection sleeve and the underwater pipeline to prevent water from flowing into the cavity between the detection sleeve and the underwater pipeline. Step 20: The image acquisition component acquires images of the outer wall of the detection section of the underwater pipeline covered by the detection sleeve in the acquisition chamber, and transmits the images of the detection section to the ground terminal for image recognition to determine whether there is a leak point in the detection section; In step 30, the plugging assembly opens the opening between the end of the detection sleeve and the underwater pipeline, and the detection sleeve moves to the next detection section position.

[0011] As a further improvement of the present invention, in step 10, after the detection sleeve reaches the detection section position, the air pump inflates the annular airbag, and the annular airbag expands due to the gas pressure until it is pressed against the outer wall of the underwater pipe and then the inflation is stopped, thereby closing the opening between the end of the detection sleeve and the underwater pipe; in step 30, after the collection is completed, the air pump draws air from the annular airbag, and the annular airbag gradually shrinks until there is no air in the annular airbag and then the air is stopped from being inflated, thereby opening the opening between the end of the detection sleeve and the underwater pipe.

[0012] As a further improvement of the present invention, step 10 also includes: if the cavity between the detection sleeve and the underwater pipe is not filled with water, the water outside the detection sleeve flows into the cavity between the detection sleeve and the underwater pipe through the one-way valve until the cavity between the detection sleeve and the underwater pipe is filled with water.

[0013] As a further improvement of the present invention, in step 10, before the detection sleeve moves, the wing plate is rotated so that the plane of the wing plate is perpendicular to the axial direction of the detection sleeve; the flowing water acts on the wing plate, generating thrust to push the detection sleeve to move; when the detection sleeve moves to the detection section position, the wing plate is rotated so that the plane of the wing plate is parallel to the axial direction of the detection sleeve, and the flowing water no longer generates thrust.

[0014] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: (1) The present invention provides an underwater pipeline leakage detection device and method based on image recognition, which is used to detect underwater pipelines that do not require soil covering; the detection sleeve is mounted on the underwater pipeline and can move along the underwater pipeline. When the detection sleeve moves to the position to be detected in the underwater pipeline, the openings between the two ends of the detection sleeve and the underwater pipeline are closed by the sealing components at both ends of the detection sleeve, preventing external water from flowing into the space between the detection sleeve and the underwater pipeline, thereby ensuring that the water between the detection sleeve and the underwater pipeline remains still and preventing the water from flowing and affecting the shooting quality; at the same time, the image acquisition component is located in a sealed acquisition chamber, and the image acquisition component photographs the underwater pipeline through a transparent inner shell. When the image acquisition component moves in the acquisition chamber, it will not disturb the water flow and affect the shooting quality; therefore, water flow interference is effectively prevented, and a clear pipeline image can be obtained, which is transmitted to the ground terminal for image recognition processing to identify whether there is a leakage point and improve the accuracy of leakage detection. The underwater pipeline leakage detection device and method provided by the present invention can be installed on the pipeline when the pipeline is laid, and the underwater pipeline can be detected at any time according to the situation, which is easy to use.

[0015] (2) The present invention provides an underwater pipeline leakage detection device and method based on image recognition. The underwater pipeline leakage detection device is provided with a rotatable wing plate. During detection, the thrust of the water flow is used to move from upstream to downstream for detection. There is no need to set up a power mechanism, which simplifies the structure and saves costs.

[0016] (3) The present invention provides an underwater pipeline leakage detection device and method based on image recognition. The sealing component of the underwater pipeline leakage detection device adopts an annular airbag. After being inflated, it expands to seal the opening between the end of the detection sleeve and the underwater pipeline, preventing water from entering the space between the detection sleeve and the underwater pipeline and causing disturbance. The annular airbag holds the underwater pipeline tightly and limits the detection sleeve in the axial and radial directions to prevent the movement of the detection sleeve from affecting image acquisition. The radial position of the detection sleeve is adjusted so that it is coaxial with the underwater pipeline, thereby making the shooting distance along the circumference equal and improving the image clarity. The annular airbag contacts the underwater pipeline in a soft contact manner and will not damage the underwater pipeline. After being deflated, it contracts to restore the opening between the end of the detection sleeve and the underwater pipeline, allowing water to flow normally through the space between the detection sleeve and the underwater pipeline. No resistance is generated when the detection sleeve moves, ensuring smooth movement of the detection sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 1 is a schematic structural diagram of the underwater pipeline leakage detection device according to an embodiment of the present invention when the device stops detecting on an underwater pipeline; Figure 2 yes Figure 1 sectional view of .

[0019] The figure shows: a detection sleeve 1, an outer shell 11, an inner shell 12, a collection chamber 13, an annular end plate 21, an annular airbag 22, a one-way valve 23, a wing plate 3, an underwater pipe 4, a camera 51, a rotating component 52, and a moving component 53. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0021] The embodiment of the present invention provides an underwater pipeline leakage detection device based on image recognition, such as Figure 1 As shown, it includes a detection sleeve 1, which is sleeved on an underwater pipe 4. Figure 2As shown, the detection sleeve 1 includes a coaxially arranged outer shell 11 and inner shell 12, with the outer shell 11 disposed on the outside of the inner shell 12. The outer shell 11 and the inner shell are connected by covers disposed at both ends, thereby forming a sealed collection chamber 13 between the outer shell 11 and the inner shell 12. The inner shell 12 is made of a transparent material. An image acquisition component is disposed within the collection chamber 13, which is used to capture pipeline images and transmit them to a ground terminal for image recognition. A sealing component is disposed at each end of the detection sleeve 1, which is used to open or close the opening between the end of the detection sleeve and the underwater pipeline.

[0022] As a preferred example, Figure 1 As shown, if the underwater pipeline is laid along the direction of water flow, the inspection sleeve is mounted on the underwater pipeline, with one end being the upstream end and the other being the downstream end. Water flows from upstream to downstream, first passing through the upstream end of the inspection sleeve and then the downstream end. A rotatable wing plate 3 is provided on the outer wall of the upstream end of the outer shell of the inspection sleeve 1. Specifically, the wing plate 3 is plate-shaped and mounted on the outer shell via a rotating shaft. The wing plate 3 can rotate about the rotating shaft, allowing the wing plate plane to switch between being parallel to the axial direction of the inspection sleeve and being perpendicular to the axial direction of the inspection sleeve. During operation, before the inspection sleeve 1 moves, the wing plate 3 rotates perpendicular to the axial direction of the inspection sleeve, that is, perpendicular to the direction of the water flow. The flowing water acts on the wing plate to generate thrust, pushing the inspection sleeve to move. After the inspection sleeve 1 moves to the inspection position, the wing plate 3 rotates parallel to the axial direction of the inspection sleeve, that is, parallel to the direction of the water flow. The flowing water no longer generates thrust, and the inspection sleeve stops moving.

[0023] The preferred embodiment above employs a rotatable wing plate 3. When the plane of the wing plate 3 is perpendicular to the axis of the detection sleeve, the water flow generates thrust, which serves as the driving force for the detection sleeve to move. When the plane of the wing plate 3 is parallel to the axis of the detection sleeve, the water flow does not generate thrust, and the detection sleeve stops moving. This eliminates the need for an additional power mechanism, simplifies the structure, and reduces detection costs.

[0024] As a preferred example, Figure 1As shown, the sealing assembly includes an annular end plate 21 coaxially arranged at the end of the detection sleeve. The outer ring edge of the annular end plate 21 is fixedly connected to the inner wall of the inner shell. The inner ring diameter of the annular end plate 21 is larger than the outer diameter of the underwater pipe 4 and smaller than the inner diameter of the inner shell 12. An annular airbag 22 is provided on the inner ring edge of the annular end plate. The annular airbags 22 of the two sealing assemblies are connected to the same air pump, which can both inflate and inhale. During operation, after the detection sleeve 1 moves along the underwater pipe 4 to the position to be detected, the air pump inflates the annular airbag 22. The annular airbag 22 expands due to the gas pressure until it is pressed against the outer wall of the underwater pipe 4 and then stops inflating, thereby closing the opening between the end of the detection sleeve 1 and the underwater pipe 4. At the same time, because the annular airbag 22 is close to the underwater pipe 4, the detection sleeve 1 cannot move in the axial and radial directions. Furthermore, during the expansion of the annular airbag 22, it gradually contacts the wall of the underwater pipe 4, adjusting the radial position of the detection sleeve 1 so that the detection sleeve 1 and the underwater pipe 4 are coaxial. This results in a constant circumferential distance between the outer wall of the inner shell and the outer wall of the underwater pipe, and a constant circumferential distance between the shooting surface of the image acquisition assembly and the outer wall of the underwater pipe. This reduces the impact of varying shooting distances on image quality and ensures a clear pipeline image. After acquisition is complete, the air pump draws air from the annular airbag 22, gradually deflates it, and stops drawing air until it is completely depleted, thereby opening the opening between the end of the detection sleeve 1 and the underwater pipe 4. As the detection sleeve moves, water flows into the opening between the upstream end of the detection sleeve and the underwater pipe and then flows out of the opening between the downstream end of the detection sleeve and the underwater pipe, without affecting the movement of the detection sleeve.

[0025] In the preferred embodiment described above, the sealing assembly utilizes an annular airbag 22, which expands after inflation to seal the opening between the end of the detection sleeve and the underwater pipe, preventing water from entering the space between the detection sleeve and the underwater pipe and causing disturbances. The annular airbag tightly embraces the underwater pipe, limiting the detection sleeve axially and radially to prevent movement of the detection sleeve from affecting image acquisition. The radial position of the detection sleeve is adjusted so that it is coaxial with the underwater pipe, thereby ensuring that the shooting distance along the circumference is equal, thereby improving image clarity. The annular airbag makes soft contact with the underwater pipe and does not damage the underwater pipe. After deflation, it contracts to restore the opening between the end of the detection sleeve and the underwater pipe, allowing water to flow normally through the space between the detection sleeve and the underwater pipe. No resistance is generated when the detection sleeve moves, ensuring smooth movement of the detection sleeve.

[0026] Preferably, Figure 1As shown, a one-way valve 23 is installed on the annular end plate 21 of the sealing assembly at the upstream end of the detection sleeve 1. After the sealing assembly closes the opening between the end of the detection sleeve and the underwater pipeline, the detection sleeve is adjusted to be coaxial with the underwater pipeline. If the cavity between the detection sleeve and the underwater pipeline is not filled with water, water outside the detection sleeve flows into the cavity between the detection sleeve and the underwater pipeline through the one-way valve 23, thereby filling the cavity between the detection sleeve and the underwater pipeline with water. This ensures that not only is the circumferential distance between the imaging surface and the underwater pipeline equal, but the medium is also the same along the circumference (i.e., the medium is all water, not partially water and partially air), further improving the quality of the captured pipeline image.

[0027] More preferably, Figure 1 As shown, the wing plate 3 is located below a transverse plane passing through the axis of the detection sleeve 1 and parallel to the horizontal plane, while the one-way valve 23 is located above the transverse plane passing through the axis of the detection sleeve 1 and parallel to the horizontal plane. The wing plate has a certain weight and is located below the detection sleeve to prevent the detection sleeve from flipping during movement, thereby ensuring that the one-way valve 23 is always located above. When the detection sleeve stops moving, if the cavity between the detection sleeve and the underwater pipeline is not filled with water, water outside the detection sleeve can smoothly pass through the one-way valve 23 and enter the upper space between the detection sleeve and the underwater pipeline, thereby filling the cavity.

[0028] As a preferred example, Figure 2As shown, the image acquisition assembly includes a camera 51, a rotating assembly 52, and a moving assembly 53. Camera 51 is mounted on rotating assembly 52, which is in turn mounted on moving assembly 53, which is mounted on the inner wall of outer housing 11. Moving assembly 53 drives rotating assembly 52 and camera 51 axially along detection casing 1, while rotating assembly 52 drives camera 51 circumferentially around detection casing 1. The image acquisition assembly also includes a battery, which powers camera 51, rotating assembly 52, and moving assembly 53. The cover is provided with a charging port and a data transmission port, which are connected to the battery. The data transmission port is connected to the camera via an internal data transmission cable and to a ground terminal via an external data transmission cable. The length of the internal data transmission cable is set to ensure that it does not interfere with the movement of the camera within the detection casing, while the length of the external data transmission cable is set to ensure that it does not interfere with the movement of the detection casing on the underwater pipeline. The charger should be placed underwater regularly and connected to the charging port to recharge the battery. During operation, when collecting data, the moving assembly 53 drives the rotating assembly 52 and the camera 51 to one end of the inspection sleeve. The rotating assembly drives the camera to move around the circumference of the inspection sleeve once, obtaining a first-segment image of the inspection section of the underwater pipeline. The moving assembly drives the rotating assembly 52 and the camera 51 to move a preset distance along the inspection sleeve and then stops. The rotating assembly drives the camera to move around the circumference of the inspection sleeve once, obtaining a second-segment image of the inspection section of the underwater pipeline. This process continues until the moving assembly drives the rotating assembly 52 and the camera 51 to the other end of the inspection sleeve and stops. The rotating assembly drives the camera to move around the circumference of the inspection sleeve once, obtaining a final segment image of the inspection section of the underwater pipeline, thereby obtaining a complete image of the outer wall of the inspection section of the underwater pipeline.

[0029] The workflow of the underwater pipeline leakage detection device based on image recognition in the above preferred embodiment is as follows: When laying the pipeline underwater, the underwater pipeline leakage detection device is sleeved onto the underwater pipeline 4 .

[0030] During testing, the wing plate 3 is rotated so that its plane is perpendicular to the axis of the test sleeve. The flowing water acts on the wing plate, generating thrust, pushing the test sleeve forward. After the test sleeve 1 moves to the most upstream position among all the test sections, the air pump inflates the annular airbag 22. The air pressure causes the annular airbag 22 to expand until it presses against the outer wall of the underwater pipe 4. Inflation then stops, closing the opening between the end of the test sleeve 1 and the underwater pipe 4, making the test sleeve 1 and the underwater pipe 4 coaxial. The wing plate 3 is rotated so that its plane is parallel to the axis of the test sleeve, that is, parallel to the direction of the water flow. The flowing water no longer generates thrust, and the test sleeve stops moving. If the cavity between the test sleeve and the underwater pipe is not filled with water, water outside the test sleeve flows into the cavity between the two sections through the one-way valve 23 until the cavity is filled with water. The water between the test sleeve and the underwater pipe remains stationary. The moving assembly drives the rotating assembly 52 and camera 51 to one end of the inspection sleeve. The rotating assembly then moves the camera around the circumference of the inspection sleeve, capturing a first-segment image of the inspected section of the underwater pipeline. The moving assembly then moves the rotating assembly 52 and camera 51 along the inspection sleeve for a predetermined distance, then stops. The rotating assembly then moves the camera around the circumference of the inspection sleeve, capturing a second-segment image of the inspected section of the underwater pipeline. This process continues until the moving assembly moves the rotating assembly 52 and camera 51 to the other end of the inspection sleeve, where it stops. The rotating assembly then moves the camera around the circumference of the inspection sleeve, capturing a final segment image of the inspected section of the underwater pipeline. This complete image of the inspected section's outer wall is transmitted to a ground terminal for image recognition processing. The air pump draws air from the annular airbag 22, gradually deflending it until it is empty, then stops drawing air, thereby opening the opening between the end of the inspection sleeve 1 and the underwater pipeline 4. When the detection sleeve moves, water flows in through the opening between the upstream end of the detection sleeve and the underwater pipe, and then flows out through the opening between the downstream end of the detection sleeve and the underwater pipe, without affecting the movement of the detection sleeve. Rotate the wing plate 3 so that the plane of the wing plate 3 is perpendicular to the axis of the detection sleeve. The flowing water acts on the wing plate to generate thrust, pushing the detection sleeve to the next detection section located downstream.

[0031] The present invention also provides an underwater pipeline leakage detection method based on image recognition, which uses the underwater pipeline leakage detection device based on image recognition of the above embodiment. The detection method includes: In step 10, the detection sleeve 1 is sleeved on the underwater pipe 4. After the detection sleeve 1 moves along the underwater pipe to the detection section position, the sealing components at both ends of the detection sleeve 1 close the opening between the end of the detection sleeve 1 and the underwater pipe 4 to prevent water from flowing into the cavity between the detection sleeve and the underwater pipe.

[0032] In step 20, the image acquisition component acquires images of the outer wall of the detection section of the underwater pipeline covered by the detection sleeve in the acquisition chamber 13, and transmits the image of the detection section to the ground terminal for image recognition to determine whether there is a leak point in the detection section.

[0033] In step 30, the plugging assembly opens the opening between the end of the detection sleeve and the underwater pipeline, and the detection sleeve 1 moves to the next detection section position.

[0034] As a preferred example, in step 10, after the detection sleeve 1 reaches the detection section position, the air pump inflates the annular airbag 22. The annular airbag 22 expands due to the gas pressure until it presses against the outer wall of the underwater pipe 4, and then the inflation stops, thereby closing the opening between the end of the detection sleeve 1 and the underwater pipe 4. In step 30, after the collection is completed, the air pump draws air from the annular airbag 22, which gradually contracts until there is no air in the annular airbag, and then the air pump stops inflating, thereby opening the opening between the end of the detection sleeve 1 and the underwater pipe 4.

[0035] In the preferred embodiment described above, after inflation, the airbag expands and blocks the opening between the end of the detection sleeve and the underwater pipe, preventing water from entering the space between the detection sleeve and the underwater pipe and causing disturbances. The annular airbag holds the underwater pipe tightly, limiting the detection sleeve in the axial and radial directions to prevent the detection sleeve from moving and affecting image acquisition. The radial position of the detection sleeve is adjusted so that it is coaxial with the underwater pipe, thereby making the shooting distance along the circumference equal and improving image clarity. The annular airbag makes soft contact with the underwater pipe and will not damage the underwater pipe. After deflation, the airbag contracts to restore the opening between the end of the detection sleeve and the underwater pipe, allowing water to flow normally through the space between the detection sleeve and the underwater pipe. No resistance is generated when the detection sleeve moves, ensuring smooth movement of the detection sleeve.

[0036] Preferably, step 10 also includes: if the cavity between the detection sleeve 1 and the underwater pipe 4 is not filled with water, the water outside the detection sleeve 1 flows into the cavity between the detection sleeve 1 and the underwater pipe 4 through the one-way valve 23 until the cavity between the detection sleeve 1 and the underwater pipe 4 is filled with water.

[0037] In the preferred embodiment described above, after the plugging assembly closes the opening between the end of the detection sleeve and the underwater pipeline, the detection sleeve is adjusted to be coaxial with the underwater pipeline. If the cavity between the detection sleeve and the underwater pipeline is not fully filled with water, water outside the detection sleeve flows into the cavity between the detection sleeve and the underwater pipeline through the one-way valve 23, thereby filling the cavity between the detection sleeve and the underwater pipeline with water. This ensures that not only is the circumferential distance between the imaging surface and the underwater pipeline equal, but the medium is also uniform along the circumference, further improving the quality of the captured pipeline image.

[0038] As a preferred example, before the detection sleeve 1 moves, the wing plate 3 is rotated so that its plane is perpendicular to the axial direction of the detection sleeve 1. The flowing water acts on the wing plate 3, generating thrust to propel the detection sleeve 1. After the detection sleeve 1 moves to the detection section, the wing plate 3 is rotated so that its plane is parallel to the axial direction of the detection sleeve, and the flowing water no longer generates thrust.

[0039] The preferred embodiment above employs a rotatable wing plate 3. When the plane of the wing plate 3 is perpendicular to the axis of the detection sleeve, the water flow generates thrust, which serves as the driving force for the detection sleeve to move. When the plane of the wing plate 3 is parallel to the axis of the detection sleeve, the water flow does not generate thrust, and the detection sleeve stops moving. This eliminates the need for an additional power mechanism, simplifies the structure, and reduces detection costs.

[0040] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the scope of protection of the present invention.

Claims

1. An underwater pipeline leakage detection device based on image recognition, characterized in that: The invention comprises a detection sleeve (1), wherein the detection sleeve (1) comprises an outer shell (11) and an inner shell (12) which are coaxially arranged, the outer shell (11) being arranged outside the inner shell (12), and a sealed collection cavity (13) being formed between the outer shell (11) and the inner shell (12); the inner shell (12) being made of a transparent material; an image collection component is provided in the collection cavity (13) for collecting pipeline images and sending them to a ground terminal for image recognition; and blocking components are respectively provided at both ends of the detection sleeve (1), and the blocking components are used to open or close the opening between the end of the detection sleeve and the underwater pipeline (4).

2. The underwater pipeline leakage detection device based on image recognition according to claim 1 is characterized in that: A rotatable wing plate (3) is provided on the outer wall of the housing at the upstream end of the detection sleeve.

3. The underwater pipeline leakage detection device based on image recognition according to claim 2 is characterized in that: The plugging assembly comprises an annular end plate (21) arranged at the end of the detection sleeve, wherein the inner ring diameter of the annular end plate (21) is larger than the outer diameter of the underwater pipe (4) and smaller than the inner diameter of the inner shell (12); and an annular air bag (22) is provided on the inner ring edge of the annular end plate (21).

4. The underwater pipeline leakage detection device based on image recognition according to claim 3 is characterized in that: A one-way valve (23) is provided on the annular end plate (21) of the blocking assembly arranged at the upstream end of the detection sleeve.

5. The underwater pipeline leakage detection device based on image recognition according to claim 4 is characterized in that: The wing plate (3) is located below a cross-section passing through the axis of the detection sleeve (1) and parallel to the horizontal plane, and the one-way valve (23) is located above a cross-section passing through the axis of the detection sleeve (1) and parallel to the horizontal plane.

6. The underwater pipeline leakage detection device based on image recognition according to claim 1 is characterized in that: The image acquisition assembly comprises a camera (51), a rotating assembly (52) and a moving assembly (53); the camera (51) is mounted on the rotating assembly (52); the rotating assembly (52) is mounted on the moving assembly (53); and the moving assembly (53) is mounted on the inner wall of the outer shell (11).

7. A method for underwater pipeline leakage detection based on image recognition, characterized in that: The underwater pipeline leakage detection device based on image recognition according to any one of claims 1 to 6 is used; the detection method includes: Step 10, the detection sleeve (1) is sleeved on the underwater pipe (4), and after the detection sleeve (1) moves along the underwater pipe to the detection section position, the blocking components at both ends of the detection sleeve (1) close the opening between the end of the detection sleeve (1) and the underwater pipe (4), preventing water from flowing into the cavity between the detection sleeve and the underwater pipe; Step 20, the image acquisition component acquires images of the outer wall of the detection section of the underwater pipeline covered by the detection sleeve in the acquisition chamber (13), and transmits the images of the detection section to the ground terminal for image recognition to determine whether there is a leak point in the detection section; Step 30: The plugging assembly opens the opening between the end of the detection sleeve and the underwater pipeline, and the detection sleeve (1) moves to the next detection section position.

8. The underwater pipeline leakage detection method based on image recognition according to claim 7 is characterized in that: In the step 10, after the detection sleeve (1) reaches the detection section position, the air pump inflates the annular airbag (22), and the annular airbag (22) expands due to the gas pressure until it presses against the outer wall of the underwater pipe (4), and then the inflation is stopped, thereby closing the opening between the end of the detection sleeve (1) and the underwater pipe (4); in the step 30, after the collection is completed, the air pump draws air from the annular airbag (22), and the annular airbag (22) gradually contracts until there is no air in the annular airbag, and then the inflating is stopped, thereby opening the opening between the end of the detection sleeve (1) and the underwater pipe (4).

9. The underwater pipeline leakage detection method based on image recognition according to claim 8 is characterized in that: Said step 10 further comprises: if the cavity between the detection sleeve (1) and the underwater pipe (4) is not filled with water, water outside the detection sleeve (1) flows into the cavity between the detection sleeve (1) and the underwater pipe (4) through the one-way valve (23) until the cavity between the detection sleeve (1) and the underwater pipe (4) is filled with water.

10. The underwater pipeline leakage detection method based on image recognition according to claim 7, characterized in that: In step 10, before the detection sleeve (1) moves, the wing plate (3) is rotated so that the plane of the wing plate (3) is perpendicular to the axial direction of the detection sleeve (1); the flowing water acts on the wing plate (3), generating thrust to push the detection sleeve (1) to move; after the detection sleeve (1) moves to the detection section position, the wing plate (3) is rotated so that the plane of the wing plate (3) is parallel to the axial direction of the detection sleeve, and the flowing water no longer generates thrust.

Images