A device and method for detecting leakage defects in a room closed water test based on infrared and visible light fusion

Abstract

The application relates to a room closed water test leakage defect detection device and method based on infrared and visible light fusion, which comprises a main machine shell, a fixed wide-angle visible light imaging module, a lifting type infrared thermal imaging scanning module, an edge processor, a power supply module and a communication module. The fixed wide-angle visible light imaging module is arranged on the upper surface of the main machine shell and is used for acquiring a global visible light image of a floor bottom surface to be detected; the lifting type infrared thermal imaging scanning module is arranged in the main machine shell and can move between a storage position and a working position; after being lifted to the working position, the target detection area is subjected to partition infrared thermal imaging collection through horizontal rotation and pitching adjustment. Compared with the prior art, the application can realize non-contact detection, automatic scanning and positioning of a room closed water test leakage area.

Description

Technical Field

[0001] This invention belongs to the field of non-destructive testing technology in building engineering, and relates to a device and method for detecting leakage defects in room water tightness tests based on the fusion of infrared and visible light. Background Technology

[0002] In building construction, bathrooms, roofs, underground structural slabs, and other building components that are constantly exposed to damp environments or require waterproofing are prone to leakage due to insufficient waterproofing layer construction quality, concrete cracks, pipeline damage, and improper joint treatment. Leakage not only affects the normal function of the building but can also lead to steel corrosion, concrete deterioration, damage to the finishing layer, and decreased structural durability. Therefore, it is essential to promptly identify and locate leakage areas during construction acceptance or maintenance.

[0003] Currently, water tightness tests or water retention tests are commonly used in building construction to inspect the quality of waterproofing projects. A water tightness test typically involves filling the area to be tested with water for a certain period, after which inspectors observe from below the floor slab for dripping water, water stains, dampness, or leaks. While this method is simple to operate, it relies heavily on manual inspection, which can lead to issues such as insufficient continuity of inspection, high subjectivity, and difficulty in detecting early, minor leaks. In areas with insufficient sunlight, numerous pipe obstructions, or complex floor surface textures, manual inspection is prone to missed detections or misjudgments.

[0004] Infrared thermal imaging technology can acquire the temperature field distribution of the surface being measured. When there are areas of moisture migration, dampness diffusion, or leakage inside or on the surface of building components, their thermal conductivity and surface temperature distribution may differ from the surrounding areas. Therefore, infrared thermal imaging can be used as a non-contact detection technique for leakage defects. However, when using an infrared thermal imaging camera alone for detection, there are still problems such as unintuitive spatial positioning of the detection area, lack of visible scene information in the infrared image, limited field of view, and difficulty in automatically scanning large areas.

[0005] Specifically, the field of view of infrared thermal imaging cameras is usually relatively limited. If only infrared thermal imaging is used to detect the entire underside of a floor slab, multiple rotations, segmented acquisitions, and image stitching are required to cover the entire detection area. Without a global scene reference, it is difficult to directly correlate temperature anomalies in the infrared thermal image with the specific spatial location of the underside of the floor slab, which is also not conducive to automatically generating scanning paths and determining the scanning coverage area.

[0006] In contrast, the wide-angle visible light imaging module can acquire a global visible light image of the underside of the floor slab under inspection within a larger field of view. This image is used to determine the detection boundaries, structural references, and target detection area, and provides spatial reference for infrared scanning path planning. The infrared thermal imaging module, on the other hand, is used to acquire temperature field information of a local area, identifying temperature anomalies caused by leakage, moisture diffusion, or water migration. Therefore, the visible light image mainly provides global spatial positioning information, while the infrared thermal image mainly provides temperature anomaly detection information; the two complement each other.

[0007] Furthermore, infrared thermal imaging cameras differ from visible light cameras in imaging principles, field of view, spatial location, and image scale. Without establishing a stable spatial mapping relationship, it is difficult to accurately map areas of abnormal infrared temperature to the actual locations of building components. For the undersides of floor slabs, roof slabs, or underground structure slabs during water tightness tests or water storage inspections, how to acquire overall spatial information using visible light images and guide the infrared thermal imaging camera to perform zonal scanning and precise positioning is a problem that needs to be solved to achieve automated leakage detection.

[0008] Therefore, it is necessary to propose a room water tightness test leakage defect detection device and method based on infrared and visible light fusion, so that it can automatically scan, image fusion and leakage defect location of the bottom surface of the building component to be tested during the water tightness test or water storage test, thereby improving the automation level, detection coverage and positioning accuracy of leakage detection. Summary of the Invention

[0009] The purpose of this invention is to provide a room water tightness test leakage defect detection device and method based on the fusion of infrared and visible light, which can solve the problems of insufficient continuity of manual inspection in the existing building leakage detection process, easy influence of personnel experience on the detection results, insufficient spatial positioning capability of infrared detection, and difficulty in automatically covering large-area detection areas.

[0010] The objective of this invention can be achieved through the following technical solutions: In a first aspect, the present invention provides a room water tightness test leakage defect detection device based on the fusion of infrared and visible light, comprising: Main unit casing; A fixed wide-angle visible light imaging module is disposed on the upper surface of the main unit housing and is arranged facing the bottom surface of the floor slab to be inspected; The lifting infrared thermal imaging scanning module includes a lifting platform located inside the main housing and capable of moving up and down, a horizontal rotating component mounted on the lifting platform and capable of rotating around a vertical axis, a pitch adjustment component disposed on the horizontal rotating component and capable of rotating around a horizontal axis, and an infrared thermal imaging camera mounted on the pitch adjustment component. An edge processor is disposed within the main unit housing and is connected to the fixed wide-angle visible light imaging module, the infrared thermal imaging camera, the pitch adjustment component, and the horizontal rotation component, respectively.

[0011] Furthermore, the main unit housing is provided with a storage opening corresponding to the lifting infrared thermal imaging scanning module. The lifting infrared thermal imaging scanning module is disposed inside the main unit housing and can move between the storage position and the working position.

[0012] Furthermore, the storage opening is provided with an openable and closable protective cover, which can cover the storage opening when closed and avoid the storage opening when open.

[0013] Furthermore, the main housing is also provided with a lifting drive assembly and a guide assembly. The lifting platform is slidably mounted on the guide assembly. The lifting drive assembly is connected to the lifting platform and is used to drive the lifting platform to move up and down vertically on the guide assembly.

[0014] Furthermore, the lifting drive assembly includes a lifting drive motor, a lead screw, and a nut seat. The lifting drive motor is fixedly installed inside the main housing. The lead screw is connected to the lifting drive motor and rotates around its own axis. The nut seat is threadedly engaged with the lead screw and is fixedly connected to the lifting platform. The nut seat moves up and down along the lead screw and drives the lifting platform to move up and down.

[0015] Furthermore, the guiding assembly includes a guide post and a guide sleeve. The guide post is fixedly disposed inside the main housing, and the guide sleeve is fixedly disposed on the lifting platform and sleeved on the outside of the guide post. The guide sleeve can slide up and down along the guide post.

[0016] Furthermore, the pitch adjustment assembly includes a pitch bracket, a pitch axis, and a pitch drive motor. The infrared thermal imaging camera is mounted on the pitch bracket via the pitch axis, and the pitch drive motor is connected to the pitch axis. The infrared thermal imaging camera rotates around itself with the pitch axis.

[0017] Furthermore, the horizontal rotation assembly includes a horizontal rotation base and a horizontal rotation drive motor. The horizontal rotation base is disposed on the lifting platform, and the pitch adjustment assembly is installed on the horizontal rotation base. The horizontal rotation base can rotate around a vertical axis under the drive of the horizontal rotation drive motor.

[0018] Furthermore, the edge processor includes: The joint calibration module can establish a spatial mapping relationship between the global visible light image coordinate system and the infrared thermal imaging scanning coordinate system based on the relative installation position, field of view and imaging coordinate relationship between the fixed wide-angle visible light imaging module and the infrared thermal imaging camera. The scanning path planning module can generate an infrared scanning path based on the target detection area in the global visible light image obtained by the fixed wide-angle visible light imaging module and the spatial mapping relationship. The image fusion module can stitch together multiple infrared thermal images acquired by the infrared thermal imaging camera, and spatially register and fuse the stitched infrared thermal image with the global visible light image. The leakage identification module can identify leakage defects based on temperature anomaly areas in the fused image.

[0019] Furthermore, the joint calibration, scanning path planning, infrared image stitching, spatial registration, image fusion, and leakage defect identification processes in the edge processor can be implemented using image processing, coordinate mapping, and temperature anomaly identification methods commonly used in the field. The key improvement of this invention lies in combining the global spatial information acquired by the fixed wide-angle visible light imaging module with the local temperature field information acquired by the lifting infrared thermal imaging scanning module, and through the spatial mapping relationship between the two, realizing the automatic scanning, fusion display, and location output of leakage defect areas on the bottom surface of the building component to be detected during water tightness testing or water storage detection.

[0020] Furthermore, before the device leaves the factory or is used in the field, the joint calibration module can obtain the image coordinates of the fixed wide-angle visible light imaging module, the image coordinates of the infrared thermal imaging camera, and the corresponding horizontal rotation angle and pitch angle of the infrared thermal imaging camera, respectively, using a calibration plate, marker points, or a floor surface reference with known geometric dimensions. Based on multiple sets of correspondences, a spatial mapping relationship is established between the global visible light image coordinate system and the infrared thermal imaging scanning coordinate system. This spatial mapping relationship can be established using homography transformation, coordinate lookup tables, piecewise linear mapping, or polynomial fitting.

[0021] Furthermore, the scanning path planning module divides the target detection area into multiple sub-detection areas based on the target detection area determined in the global visible light image, and generates an infrared scanning path covering the target detection area based on the field of view, installation height, horizontal rotation range, pitch adjustment range of the infrared thermal imaging camera, and the overlap rate between adjacent infrared thermal images. The infrared scanning path can be a raster scanning path, a serpentine scanning path, or a line-by-line scanning path.

[0022] Furthermore, the image fusion module acquires the horizontal rotation angle, pitch angle, and field of view corresponding to each infrared thermal image acquisition, and projects multiple infrared thermal images onto a unified target detection area coordinate system based on the spatial mapping relationship established by the joint calibration module. For overlapping areas of adjacent infrared thermal images, weighted averaging, temperature value priority, or edge smoothing methods can be used to stitch them together, thereby forming an overall infrared thermal image of the target detection area.

[0023] Furthermore, the image fusion module aligns the overall infrared thermal image with the global visible light image according to the joint calibration parameters, enabling the infrared temperature anomaly areas to be superimposed on the corresponding floor slab bottom positions in the visible light image. The fused image can be formed by semi-transparent superposition of a pseudo-color infrared temperature image and a visible light image, superposition of anomaly region outlines, or annotation of anomaly region boundaries.

[0024] Furthermore, the leakage identification module identifies leakage defects based on temperature anomaly areas in infrared thermal images or fused images. Specifically, it first calculates the background temperature, local average temperature, or neighborhood temperature distribution within the target detection area, then identifies areas with preset temperature differences from the surrounding area as candidate anomaly areas; subsequently, it combines area thresholds, regional connectivity, shape continuity, edge gradients, or spatial relationships with easily leaking locations such as pipe roots, construction joints, and internal corners to remove isolated noise points and outputs the location, area, and degree of anomaly of the leakage defect area.

[0025] In a second aspect, the present invention provides a method for detecting leakage defects in a room water tightness test based on the fusion of infrared and visible light, which is implemented based on the room water tightness test leakage defect detection device described in the first aspect above, and includes the following steps: S1. Conduct a water tightness test or water storage test on the floor of the room to be tested to create a water storage area above the floor slab to be tested; S2. Arrange the room water tightness test leakage defect detection device under the floor slab to be tested, so that the fixed wide-angle visible light imaging module and the infrared thermal imaging camera face the bottom surface of the floor slab to be tested. S3. Obtain a global visible light image of the bottom surface of the floor slab to be detected through the fixed wide-angle visible light imaging module, and determine the target detection area; S4. Based on the joint calibration parameters between the fixed wide-angle visible light imaging module and the infrared thermal imaging camera, the edge processor maps the target detection area to the infrared thermal imaging scanning coordinate system and generates the corresponding infrared scanning path. S5. Control the lifting infrared thermal imaging scanning module to move from the storage position to the working position, and perform horizontal rotation and pitch angle adjustment according to the infrared scanning path, while performing partitioned infrared thermal imaging acquisition on the target detection area. S6. Stitch together the multiple infrared thermal images acquired to form an infrared thermal image of the target detection area; S7. Spatial registration and fusion of the infrared thermal image and the global visible light image are performed to obtain a fused image; S8. Identify leakage defects based on the temperature anomaly areas in the fused image, and output the location of the leakage defects and the detection results.

[0026] Furthermore, in S8, leakage defects can be identified based on temperature differences in the fused image, combined with image segmentation or image recognition methods.

[0027] Compared with the prior art, the present invention has the following advantages: (1) The present invention uses a fixed wide-angle visible light imaging module to acquire a global visible light image of the bottom surface of the floor slab to be detected. Since the wide-angle visible light imaging module has a large field of view, it can acquire the overall scene information of the detection area, thus providing a global spatial reference for determining the detection boundary, delineating the target detection area, and planning the infrared scanning path.

[0028] (2) This invention combines a fixed wide-angle visible light imaging module with an infrared thermal imaging camera. It uses visible light images to provide global spatial positioning information and infrared thermal images to provide temperature anomaly detection information. This overcomes the problems of limited field of view, unintuitive spatial positioning, and difficulty in corresponding abnormal areas to actual floor slab locations when using infrared thermal imaging alone, thereby improving the accuracy of identifying and locating leakage defects in a large detection area.

[0029] (3) The present invention adopts a lifting infrared thermal imaging scanning module and sets the infrared thermal imaging camera on the pitch adjustment component and the horizontal rotation component, so that the infrared thermal imaging camera can be stored and protected in the non-working state, and raised out of the main body housing in the working state, and perform zoned thermal imaging acquisition of the target detection area through horizontal rotation and pitch adjustment, thereby improving the on-site applicability and detection coverage of the device.

[0030] (4) By fixing the joint calibration parameters between the wide-angle visible light imaging module and the infrared thermal imaging camera, the present invention establishes a spatial mapping relationship between the global visible light image coordinate system and the infrared thermal imaging scanning coordinate system, so that the target detection area in the visible light image can be converted into the infrared scanning path, and the infrared temperature abnormal area can be accurately mapped to the actual position of the bottom surface of the floor.

[0031] (5) The present invention completes infrared image stitching, spatial registration, image fusion and leakage defect identification through an edge processor, and outputs the detection results through a communication module. This can reduce the dependence of manual inspection on personnel experience and on-site observation conditions, and improve the automation, detection continuity and result reliability of leakage defect detection during water tightness test or water storage test. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the room water tightness test leakage defect detection device based on the fusion of infrared and visible light according to the present invention. Figure 2 This is a schematic diagram of the working state of the room water tightness test leakage defect detection device based on the fusion of infrared and visible light according to the present invention. Figure 3 This is a partial structural schematic diagram of the lifting infrared thermal imaging scanning module in this invention; Figure 4 This is a schematic diagram of the internal functional module arrangement of the host casing in this invention; Figure 5 This is a schematic diagram of the infrared scanning path and image fusion relationship in this invention.

[0033] Explanation of the labels in the diagram: 1. Main unit housing; 2. Fixed wide-angle visible light imaging module; 3. Lifting infrared thermal imaging scanning module; 3-1. Infrared thermal imaging camera; 3-2. Pitch adjustment assembly; 3-21. Pitch bracket; 3-22. Pitch axis; 3-23. Pitch drive motor; 3-3. Horizontal rotation assembly; 3-31. Horizontal rotation base; 3-32. Horizontal rotation drive motor; 3-4. Lifting platform; 3-5. Lifting drive assembly; 3-51. Lifting drive motor; 3-52. Lead screw; 3-53. Nut seat; 3-6. Guide assembly; 3-61. Guide column; 3-62. Guide sleeve; 4. Storage opening; 5. Openable and closable protective cover; 6. Edge processor; 7. Power supply module; 8. Communication module; 9. Building component to be inspected; 10. Target detection area; 11. Infrared scanning path; 12. Infrared thermal image; 13. Global visible light image; 14. Fuded image; 15. Leakage defect area. Detailed Implementation

[0034] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0035] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] Unless otherwise specified, the functional components or structures in the following embodiments or examples are conventional components or structures used in the art to achieve the corresponding functions.

[0038] To address the problems of insufficient continuity of manual inspections, susceptibility of test results to human experience, inadequate spatial positioning capabilities of infrared detection, and difficulty in automatically covering large-area detection areas in existing building leakage detection processes, this invention provides a room water tightness test leakage defect detection device based on the fusion of infrared and visible light, comprising: Main unit casing; A fixed wide-angle visible light imaging module is disposed on the upper surface of the main unit housing and is arranged facing the bottom surface of the floor slab to be inspected; The lifting infrared thermal imaging scanning module includes a lifting platform located inside the main housing and capable of moving up and down, a horizontal rotating component mounted on the lifting platform and capable of rotating around a vertical axis, a pitch adjustment component disposed on the horizontal rotating component and capable of rotating around a horizontal axis, and an infrared thermal imaging camera mounted on the pitch adjustment component. An edge processor is disposed within the main unit housing and is connected to the fixed wide-angle visible light imaging module, the infrared thermal imaging camera, the pitch adjustment component, and the horizontal rotation component, respectively.

[0039] In some specific embodiments, the main unit housing is provided with a storage opening corresponding to the lifting infrared thermal imaging scanning module, the lifting infrared thermal imaging scanning module is disposed inside the main unit housing, and can move between the storage position and the working position.

[0040] In a more specific embodiment, the storage opening is provided with an openable and closable protective cover. The protective cover covers the storage opening in the closed position and avoids the storage opening in the open position. When the liftable infrared thermal imaging scanning module is in the stored position, the infrared thermal imaging camera is located inside the main housing; when the liftable infrared thermal imaging scanning module is in the working position, the infrared thermal imaging camera extends from the storage opening to the top of the main housing. For example, the openable and closable protective cover can be a sliding cover, a flip cover, or other structural form capable of opening and closing the storage opening.

[0041] In some specific embodiments, the main housing is further provided with a lifting drive assembly and a guide assembly. The lifting platform is slidably mounted on the guide assembly. The lifting drive assembly is connected to the lifting platform and is used to drive the lifting platform to move up and down in the vertical direction on the guide assembly.

[0042] In a more specific embodiment, the lifting drive assembly includes a lifting drive motor, a lead screw, and a nut seat. The lifting drive motor is fixedly installed inside the main housing. The lead screw is connected to the lifting drive motor and rotates around its own axis. The nut seat is threadedly engaged with the lead screw and is fixedly connected to the lifting platform. The nut seat moves up and down along the lead screw and drives the lifting platform to move up and down.

[0043] In a more specific embodiment, the guide assembly includes a guide post and a guide sleeve. The guide post is fixedly disposed inside the main housing, and the guide sleeve is fixedly disposed on the lifting platform and sleeved on the outside of the guide post. The guide sleeve can slide up and down along the guide post.

[0044] In some specific embodiments, the pitch adjustment assembly includes a pitch bracket, a pitch axis, and a pitch drive motor. The infrared thermal imaging camera is mounted on the pitch bracket via the pitch axis, and the pitch drive motor is connected to the pitch axis. The infrared thermal imaging camera rotates around itself with the pitch axis.

[0045] In some specific embodiments, the horizontal rotation assembly includes a horizontal rotation base and a horizontal rotation drive motor. The horizontal rotation base is disposed on the lifting platform, and the pitch adjustment assembly is installed on the horizontal rotation base. The horizontal rotation base can rotate around a vertical axis under the drive of the horizontal rotation drive motor.

[0046] In some specific implementations, the edge processor includes: The joint calibration module can establish a spatial mapping relationship between the global visible light image coordinate system and the infrared thermal imaging scanning coordinate system based on the relative installation position, field of view and imaging coordinate relationship between the fixed wide-angle visible light imaging module and the infrared thermal imaging camera. The scanning path planning module can generate an infrared scanning path based on the target detection area in the global visible light image obtained by the fixed wide-angle visible light imaging module and the spatial mapping relationship. The image fusion module can stitch together multiple infrared thermal images acquired by the infrared thermal imaging camera, and spatially register and fuse the stitched infrared thermal image with the global visible light image. The leakage identification module can identify leakage defects based on temperature anomaly areas in the fused image.

[0047] In addition, the edge processor may also include a communication module for outputting information such as the location of leakage defects and detection results.

[0048] Each of the above implementation methods can be implemented individually, or in any combination of two or more without violating logic.

[0049] The above implementation methods will be described in more detail below with reference to specific embodiments.

[0050] Example 1: like Figures 1 to 4 As shown, this embodiment provides a room water tightness test leakage defect detection device based on infrared and visible light fusion, including a main unit housing 1, a fixed wide-angle visible light imaging module 2, a liftable infrared thermal imaging scanning module 3, an edge processor 6, a power supply module 7, and a communication module 8.

[0051] The main unit housing 1 has a low, box-like structure, used to house the fixed wide-angle visible light imaging module 2 and the liftable infrared thermal imaging scanning module 3, as well as internal functional modules such as the edge processor 6, power supply module 7, and communication module 8. The upper surface of the main unit housing 1 is provided with the fixed wide-angle visible light imaging module 2 and the storage opening 4 corresponding to the liftable infrared thermal imaging scanning module 3.

[0052] A fixed wide-angle visible light imaging module 2 is mounted on the upper surface of the main housing 1, facing the bottom surface of the building component 9 to be inspected. The building component 9 to be inspected can be a floor slab, roof slab, underground structural slab, or other building component requiring waterproofing inspection. The fixed wide-angle visible light imaging module 2 is used to acquire a global visible light image 13 of the bottom surface of the building component 9 to be inspected. The fixed wide-angle visible light imaging module 2 can employ a wide-angle camera or a fisheye camera to obtain a larger visible light field of view.

[0053] The liftable infrared thermal imaging scanning module 3 is housed within the main unit casing 1 and can move between a storage position and a working position. For example... Figure 1 As shown, in the non-operating state, the liftable infrared thermal imaging scanning module 3 is in the retracted position, and the infrared thermal imaging camera 3-1 is stored inside the main unit housing 1. Figure 2 As shown, in the working state, the lifting infrared thermal imaging scanning module 3 rises out from the storage opening 4 to the top of the main unit housing 1, and the infrared thermal imaging camera 3-1 faces the bottom surface of the building component 9 to be inspected to collect infrared thermal images.

[0054] A closable protective cover 5 may be provided at the storage opening 4 of the main unit housing 1. The closable protective cover 5 covers the storage opening 4 in the closed position and avoids the storage opening 4 in the open position. The closable protective cover 5 may be a sliding cover, a flip-up cover, or other structural form capable of opening and closing the storage opening 4. Specifically, the closable protective cover 5 is a skylight-type sliding protective cover that can slide along the guide structure on the upper surface of the main unit housing 1.

[0055] like Figure 3 As shown, the lifting infrared thermal imaging scanning module 3 includes an infrared thermal imaging camera 3-1, a pitch adjustment component 3-2, a horizontal rotation component 3-3, a lifting platform 3-4, a lifting drive component 3-5, and a guide component 3-6.

[0056] An infrared thermal imaging camera 3-1 is mounted on a pitch adjustment assembly 3-2. The pitch adjustment assembly 3-2 is mounted on a horizontal rotation assembly 3-3, which is mounted on a lifting platform 3-4. The lifting platform 3-4 is connected to a lifting drive assembly 3-5 and cooperates with a guide assembly 3-6. Thus, the infrared thermal imaging camera 3-1, the pitch adjustment assembly 3-2, and the horizontal rotation assembly 3-3 can rise and fall as a whole with the lifting platform 3-4.

[0057] The pitch adjustment assembly 3-2 includes a pitch bracket 3-21, a pitch axis 3-22, and a pitch drive motor 3-23. The infrared thermal imaging camera 3-1 is mounted on the pitch bracket 3-21 via the pitch axis 3-22. The pitch drive motor 3-23 is connected to the pitch axis 3-22. When the pitch drive motor 3-23 operates, the pitch axis 3-22 rotates around its own axis, and the infrared thermal imaging camera 3-1 adjusts its pitch angle accordingly.

[0058] The horizontal rotation component 3-3 includes a horizontal rotation base 3-31 and a horizontal rotation drive motor 3-32. The horizontal rotation base 3-31 is mounted on the lifting platform 3-4, and the pitch adjustment component 3-2 is mounted on the horizontal rotation base 3-31. Driven by the horizontal rotation drive motor 3-32, the horizontal rotation base 3-31 rotates around a vertical axis, thereby driving the pitch adjustment component 3-2 and the infrared thermal imaging camera 3-1 to adjust their horizontal angles.

[0059] The lifting drive assembly 3-5 includes a lifting drive motor 3-51, a lead screw 3-52, and a nut seat 3-53. The lifting drive motor 3-51 is fixedly installed inside the main housing 1. The lead screw 3-52 is connected to the lifting drive motor 3-51 and rotates around its own axis. The nut seat 3-53 is threadedly engaged with the lead screw 3-52 and is fixedly connected to the lifting platform 3-4. When the lead screw 3-52 rotates, the nut seat 3-53 moves up and down along the lead screw 3-52, thereby driving the lifting platform 3-4 to move up and down.

[0060] Please see again. Figure 3 As shown, the upper end of the lead screw 3-52 can be installed inside the main housing 1 via an upper bearing seat or an upper support plate, and the lower end of the lead screw 3-52 is connected to the lifting drive motor 3-51. The lead screw 3-52 rotates in place under the drive of the lifting drive motor 3-51, and the nut seat 3-53 moves up and down along the lead screw 3-52. The nut seat 3-53 can be a square nut block, a cylindrical nut seat, or a lead screw nut seat with a flange.

[0061] The guide assembly 3-6 includes a guide post 3-61 and a guide sleeve 3-62. The guide post 3-61 is fixedly installed inside the main housing 1, and the guide sleeve 3-62 is fixedly installed on the lifting platform 3-4 and sleeved on the outside of the guide post 3-61. The guide sleeve 3-62 can slide up and down along the guide post 3-61. The guide post 3-61 and the guide sleeve 3-62 cooperate to allow the lifting platform 3-4 to move vertically under the action of the lead screw 3-52 and the nut seat 3-53. There can be two or more guide posts 3-61, distributed on both sides or around the lifting platform 3-4.

[0062] like Figure 4As shown, the edge processor 6, power supply module 7, and communication module 8 are housed within the main unit casing 1. The edge processor 6 is connected to the fixed wide-angle visible light imaging module 2, the infrared thermal imaging camera 3-1, the pitch drive motor 3-23, the horizontal rotation drive motor 3-32, the lift drive motor 3-51, and the communication module 8. The power supply module 7 is also connected to the edge processor 6, the fixed wide-angle visible light imaging module 2, the infrared thermal imaging camera 3-1, the pitch drive motor 3-23, the horizontal rotation drive motor 3-32, the lift drive motor 3-51, and the communication module 8.

[0063] The edge processor 6 includes a joint calibration module, a scan path planning module, an image fusion module, and a leak detection module. The joint calibration module establishes a spatial mapping relationship between the fixed wide-angle visible light imaging module 2 and the infrared thermal imaging camera 3-1. The scan path planning module generates an infrared scan path 11 based on the target detection area 10 and the spatial mapping relationship. The image fusion module performs spatial registration and fusion of the infrared thermal image 12 and the global visible light image 13. The leak detection module identifies leak defect areas 15 based on temperature anomaly areas in the fused image 14.

[0064] The communication module 8 is connected to the edge processor 6 and can be a wireless communication module or a wired communication module. The communication module 8 is used to transmit the location and detection results of the infrared thermal image 12, the global visible light image 13, the fused image 14, and the leakage defect area 15 to the external terminal.

[0065] like Figure 5 As shown, the detection device provided in this embodiment can be used to detect leakage defects in building components such as floor slabs, roof slabs, and underground structure top slabs during water tightness tests or water storage tests. The specific detection method is as follows.

[0066] During the inspection, a water tightness test or water storage test is first conducted on the floor of the room to be inspected to create a water storage area above the building component 9 to be inspected. Then, the leakage defect detection device is positioned below the building component 9, with the fixed wide-angle visible light imaging module 2 and the infrared thermal imaging camera 3-1 facing the bottom surface of the building component 9. The fixed wide-angle visible light imaging module 2 acquires a global visible light image 13 of the bottom surface of the building component 9, and the edge processor 6 determines the target detection area 10 based on the global visible light image 13.

[0067] Subsequently, the edge processor 6 maps the target detection area 10 to the infrared thermal imaging scanning coordinate system based on the joint calibration parameters between the fixed wide-angle visible light imaging module 2 and the infrared thermal imaging camera 3-1, and generates an infrared scanning path 11. The infrared scanning path 11 can be a rasterized scanning path, and the infrared thermal imaging camera 3-1 performs segmented scanning of the target detection area 10 along the rasterized scanning path.

[0068] Before infrared thermal imaging acquisition, the edge processor 6 controls the lifting drive motor 3-51 to operate, causing the lifting platform 3-4 to rise along the guide assembly 3-6, and the infrared thermal imaging camera 3-1 to move from the storage position to the working position. Subsequently, the edge processor 6 controls the horizontal rotation drive motor 3-32 and the pitch drive motor 3-23 to operate, causing the infrared thermal imaging camera 3-1 to perform horizontal rotation and pitch angle adjustment according to the infrared scanning path 11, and to acquire multiple infrared thermal images 12.

[0069] Edge processor 6 stitches together multiple acquired infrared thermal images 12 to form an infrared thermal image of the target detection area 10. Subsequently, edge processor 6 spatially registers and fuses the infrared thermal image with the global visible light image 13 to obtain a fused image 14. Edge processor 6 identifies leakage defect areas 15 based on temperature anomaly areas in the fused image 14. In one embodiment, edge processor 6 can identify leakage defect areas 15 based on temperature differences in the fused image 14, combined with image segmentation or image recognition methods.

[0070] Specifically, the joint calibration module can be calibrated before the device leaves the factory or is used in the field. During calibration, a calibration plate, marker points, or a reference object with known geometric dimensions can be set on the bottom surface of the building component 9 to be inspected. The image coordinates of the component in the global visible light image 13 are obtained by the fixed wide-angle visible light imaging module 2, and the image coordinates of the component in the infrared thermal image 12 are obtained by the infrared thermal imaging camera 3-1 at different horizontal rotation angles and pitch angles. The edge processor 6 establishes a spatial mapping relationship between the global visible light image coordinate system, the infrared thermal image coordinate system, and the infrared scanning angle coordinate system based on multiple sets of corresponding points, corresponding angles, and corresponding image coordinates.

[0071] The scanning path planning module divides the target detection area 10 into multiple sub-detection areas based on the boundary range of the target detection area 10. It then combines the field of view of the infrared thermal imaging camera 3-1, the rotation range of the horizontal rotation component 3-3, the pitch range of the pitch adjustment component 3-2, and the preset overlap rate between adjacent infrared thermal images 12 to generate an infrared scanning path 11. The infrared scanning path 11 can employ raster scanning, serpentine scanning, or line-by-line scanning to ensure that the target detection area 10 is covered by the designated areas.

[0072] The image fusion module projects multiple infrared thermal images 12 onto a unified coordinate system based on the horizontal rotation angle, pitch angle, and field of view corresponding to the acquisition of each infrared thermal image 12, and stitches the overlapping areas to form an overall infrared thermal image of the target detection area 10. Subsequently, the image fusion module registers the overall infrared thermal image with the global visible light image 13 according to the spatial mapping relationship, and forms a fused image 14 by means of semi-transparent overlay, pseudo-color overlay, or boundary annotation.

[0073] The leakage identification module identifies the leakage defect region 15 based on the temperature anomaly region in the fused image 14. Specifically, the leakage identification module can determine the temperature anomaly threshold based on the background temperature or local neighborhood temperature distribution within the target detection region 10, and designate regions exceeding the temperature anomaly threshold as candidate leakage regions. Subsequently, by combining the region area, region connectivity, shape continuity, and spatial relationship with easily leaking parts such as pipe roots, construction joints, and internal corners, isolated noise points or non-leakage temperature interference regions are screened out, and finally the leakage defect region 15 is determined.

[0074] After the inspection is completed, the edge processor 6 outputs the location and inspection results of the leakage defect area 15 through the communication module 8. The inspection results can be transmitted to external terminal devices for display, recording, or subsequent analysis.

[0075] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A room water tightness test leakage defect detection device based on the fusion of infrared and visible light, characterized in that, include: Main unit casing; A fixed wide-angle visible light imaging module is disposed on the upper surface of the main unit housing and is arranged facing the bottom surface of the floor slab to be inspected; The lifting infrared thermal imaging scanning module includes a lifting platform located inside the main housing and capable of moving up and down, a horizontal rotating component mounted on the lifting platform and capable of rotating around a vertical axis, a pitch adjustment component disposed on the horizontal rotating component and capable of rotating around a horizontal axis, and an infrared thermal imaging camera mounted on the pitch adjustment component. An edge processor is disposed within the main unit housing and is connected to the fixed wide-angle visible light imaging module, the infrared thermal imaging camera, the pitch adjustment component, and the horizontal rotation component, respectively.

2. The room water tightness test leakage defect detection device based on infrared and visible light fusion as described in claim 1, characterized in that, The main unit housing has a storage opening corresponding to the lifting infrared thermal imaging scanning module. The lifting infrared thermal imaging scanning module is located inside the main unit housing and can move between the storage position and the working position.

3. The room water tightness test leakage defect detection device based on infrared and visible light fusion according to claim 2, characterized in that, The storage opening is equipped with an openable and closable protective cover. The openable and closable protective cover can cover the storage opening when closed and avoid the storage opening when open.

4. The room water tightness test leakage defect detection device based on infrared and visible light fusion according to claim 1, characterized in that, The main housing is also equipped with a lifting drive assembly and a guide assembly. The lifting platform is slidably mounted on the guide assembly. The lifting drive assembly is connected to the lifting platform and is used to drive the lifting platform to move up and down vertically on the guide assembly.

5. The room water tightness test leakage defect detection device based on infrared and visible light fusion according to claim 4, characterized in that, The lifting drive assembly includes a lifting drive motor, a lead screw, and a nut seat. The lifting drive motor is fixedly installed inside the main housing. The lead screw is connected to the lifting drive motor and rotates around its own axis. The nut seat is threadedly engaged with the lead screw and is fixedly connected to the lifting platform. The nut seat moves up and down along the lead screw and drives the lifting platform to move up and down.

6. The room water tightness test leakage defect detection device based on infrared and visible light fusion according to claim 4, characterized in that, The guiding assembly includes a guide post and a guide sleeve. The guide post is fixedly installed inside the main housing, and the guide sleeve is fixedly installed on the lifting platform and sleeved on the outside of the guide post. The guide sleeve can slide up and down along the guide post.

7. The room water tightness test leakage defect detection device based on infrared and visible light fusion according to claim 1, characterized in that, The pitch adjustment assembly includes a pitch bracket, a pitch axis, and a pitch drive motor. The infrared thermal imaging camera is mounted on the pitch bracket via the pitch axis. The pitch drive motor is connected to the pitch axis, and the infrared thermal imaging camera rotates around itself with the pitch axis.

8. The room water tightness test leakage defect detection device based on infrared and visible light fusion according to claim 1, characterized in that, The horizontal rotation assembly includes a horizontal rotation base and a horizontal rotation drive motor. The horizontal rotation base is disposed on the lifting platform, and the pitch adjustment assembly is installed on the horizontal rotation base. The horizontal rotation base can rotate around a vertical axis under the drive of the horizontal rotation drive motor.

9. The room water tightness test leakage defect detection device based on infrared and visible light fusion according to claim 1, characterized in that, The edge processor includes: The joint calibration module can establish a spatial mapping relationship between the global visible light image coordinate system and the infrared thermal imaging scanning coordinate system based on the relative installation position, field of view and imaging coordinate relationship between the fixed wide-angle visible light imaging module and the infrared thermal imaging camera. The scanning path planning module can generate an infrared scanning path based on the target detection area in the global visible light image obtained by the fixed wide-angle visible light imaging module and the spatial mapping relationship. The image fusion module can stitch together multiple infrared thermal images acquired by the infrared thermal imaging camera, and spatially register and fuse the stitched infrared thermal image with the global visible light image. The leakage identification module can identify leakage defects based on temperature anomaly areas in the fused image.

10. A method for detecting leakage defects in a room water tightness test based on the fusion of infrared and visible light, implemented using the room water tightness test leakage defect detection device as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Conduct a water tightness test or water storage test on the floor of the room to be tested to create a water storage area above the floor slab to be tested; S2. Arrange the room water tightness test leakage defect detection device under the floor slab to be tested, so that the fixed wide-angle visible light imaging module and the infrared thermal imaging camera face the bottom surface of the floor slab to be tested. S3. Obtain a global visible light image of the bottom surface of the floor slab to be detected through the fixed wide-angle visible light imaging module, and determine the target detection area; S4. Based on the joint calibration parameters between the fixed wide-angle visible light imaging module and the infrared thermal imaging camera, the edge processor maps the target detection area to the infrared thermal imaging scanning coordinate system and generates the corresponding infrared scanning path. S5. Control the lifting infrared thermal imaging scanning module to move from the storage position to the working position, and perform horizontal rotation and pitch angle adjustment according to the infrared scanning path, while performing partitioned infrared thermal imaging acquisition on the target detection area. S6. Stitch together the multiple infrared thermal images acquired to form an infrared thermal image of the target detection area; S7. Spatial registration and fusion of the infrared thermal image and the global visible light image are performed to obtain a fused image; S8. Identify leakage defects based on the temperature anomaly areas in the fused image, and output the location of the leakage defects and the detection results.

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