Inclination detection device for construction based on BIM (Building Information Modeling)

Abstract

The invention discloses a BIM (Building Information Modeling)-based inclination detection device for construction, and relates to the field of building construction. The imaging device is arranged on one side of the device main body; the projection device and the visual camera are arranged in the device main body in parallel and face the imaging device; and the BIM centralized control device is arranged in the device main body and is in communication connection with the projection device and the visual camera. According to the invention, the BIM centralized control device, the projection device and the visual camera are integrated in the device main body, so that visualization, real-time and quantifiable fusion of a BIM design model in a construction detection site is creatively realized. The precise model plane graph of the BIM component is directly projected to the imaging device through the projection device, a visual and accurate design benchmark reference is provided for a field entity component, and the problem that a traditional detection method is disjointed with digital design is fundamentally solved.

Description

Technical Field

[0001] This invention relates to the field of building construction, specifically to a BIM-based tilt detection device for construction. Background Technology

[0002] As modern construction projects become increasingly complex, large-scale, and precise, higher demands are placed on controlling the installation accuracy, verticality, and horizontality (collectively referred to as tilt) of components during construction. Traditional construction quality control methods, especially in steel structures, curtain walls, and precast component installation, often rely on post-construction, discrete measurements and verifications, making it difficult to achieve real-time, intuitive process control closely linked to design intent. Building Information Modeling (BIM) technology, as a digital tool integrating design, construction, and management information, provides an ideal data benchmark for construction accuracy control through its high-precision 3D models. How to apply the design standards contained in the BIM model to the real-time and efficient detection of tilt of physical components on the construction site has become a key technical issue for improving construction quality and efficiency.

[0003] Currently, tilt detection at construction sites mainly relies on two types of technical methods. One type is traditional manual inspection tools, such as straightedges, spirit levels, and plumb lines. While these methods are inexpensive, they are inefficient, the measurement results are heavily influenced by the operator's experience, and they are difficult to directly compare and record with digital design models. The other type is inspection methods based on electronic or optical instruments, such as electronic levels, total stations, laser levels, and even 3D laser scanners. These devices improve measurement accuracy and automation to a certain extent, but they are usually single-function, focusing either on geometric measurement or point layout. Their measurement data and BIM design models remain disconnected, requiring tedious data import, alignment, and comparison analysis in computer software later. They cannot provide real-time, visual representation of the deviation between the design model and the actual components at the inspection site.

[0004] Existing technical solutions have significant shortcomings: traditional tools and conventional measuring instruments are not deeply integrated with BIM models, leading to a disconnect between the inspection process and design standards, and low levels of automation and intelligence. Meanwhile, simple on-site BIM model viewing methods lack high-precision image acquisition and automatic analysis mechanisms, making it difficult to guarantee the accuracy and reliability of inspection results. Therefore, the industry urgently needs an integrated inspection device that can seamlessly, in real-time, and intuitively project BIM design standards into physical inspection scenarios, and automatically acquire feedback images for intelligent analysis, to solve the problems of low efficiency, strong human subjectivity, and disconnect from digital design in construction tilt detection. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a BIM-based tilt detection device for construction, so as to solve the technical problems of low efficiency, subjective results and serious disconnection from digital design models in traditional construction tilt detection methods.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a BIM-based tilt detection device for construction, comprising: a device body; an imaging device disposed on one side of the device body; a projection device and a vision camera disposed side-by-side inside the device body and facing the imaging device; and a BIM central control device disposed inside the device body and communicatively connected to the projection device and the vision camera, respectively; wherein, the BIM central control device is used to acquire BIM model data and control the projection device to project the model plan view of the BIM component onto the imaging device; the vision camera is used to acquire the projected image presented on the imaging device and transmit the image data to the BIM central control device for tilt detection analysis.

[0007] The invention is further configured to include a light-emitting device, which is disposed inside the main body of the device and faces the imaging device, for providing backlight or auxiliary light to the imaging device.

[0008] The invention is further configured such that a partition is provided inside the main body of the device, the partition dividing the interior of the main body of the device into a first chamber facing the imaging device and a second chamber facing away from it; the visual camera and the projection device are located on the side of the partition facing the imaging device, the BIM central control device is located in the second chamber and is fixedly connected to the visual camera.

[0009] The invention is further configured to include a driving mechanism for driving the visual camera and the BIM control device to rotate, thereby adjusting the shooting angle. The driving mechanism includes a control motor, a rotating shaft, and a connecting shaft. The control motor is mounted on the partition plate, the rotating shaft is connected to the output end of the control motor, and the connecting shaft is sleeved on the rotating shaft and indirectly or directly connected to it. The BIM control device is connected to the connecting shaft via a connector and a connecting plate, enabling the control motor to drive the BIM control device and the visual camera to rotate synchronously via the rotating shaft and the connecting shaft. A rotating plate is provided on the main body 1 of the device in conjunction with the BIM control device. The rotating plate is rotatably connected to the main body of the device, and several connection ports are provided on the rotating plate away from the BIM control device in conjunction with the BIM control device.

[0010] The present invention is further configured such that the imaging device includes a transparent substrate, and a PDLC plate is attached to the side of the substrate facing the projection device or inside the substrate.

[0011] The present invention is further configured such that the imaging device has multiple channels inside, the light-emitting device includes multiple light-emitting units corresponding to the channels, each channel has multiple reflectors, and the light emitted by the light-emitting unit is reflected by the reflectors and then emitted.

[0012] The invention is further configured to include a leveling mechanism, which includes a plurality of support rods, at least one of which is a telescopic structure; and the main body of the device is provided with an electronic level.

[0013] The invention is further configured such that the retractable support rod is connected to an adjustment assembly, the adjustment assembly including a mounting box disposed on one side of the support rod, a transmission gear disposed within the mounting box, a transmission rod disposed within the support rod and meshing with the transmission gear, and a handle disposed outside the mounting box for manually driving the transmission gear.

[0014] In summary, the present invention has the following main beneficial effects:

[0015] This invention creatively integrates a BIM control unit, a projection unit, and a vision camera into a single device, achieving visualization, real-time processing, and quantifiable fusion of the BIM design model at the construction inspection site. First, the projection unit directly projects the precise plan view of the BIM component onto the imaging device, providing an intuitive and accurate design reference for the physical component on site, fundamentally solving the problem of the disconnect between traditional inspection methods and digital design. Second, the vision camera automatically acquires on-site images superimposed with the projected reference lines, and the BIM control unit performs real-time comparison and analysis, achieving automated and quantitative detection of tilt, significantly improving inspection efficiency and objectivity, and overcoming the shortcomings of subjective and inefficient manual inspection. Furthermore, the integrated design facilitates on-site deployment and operation. Combined with optional lighting devices, PDLC boards, and leveling mechanisms, it further optimizes imaging clarity, environmental adaptability, and the reliability of the inspection reference, forming a complete, efficient, and high-precision construction tilt detection solution from design data to on-site inspection results. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the internal structure of the main body of the device of the present invention;

[0018] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0019] Figure 4 This is a schematic diagram of the back structure of the main body of the device of the present invention;

[0020] Figure 5 This is a schematic diagram of the imaging device structure of the present invention.

[0021] In the diagram: 1. Main body of the device; 2. Electronic level; 3. Support rod; 4. Mounting box; 5. Rotating handle; 6. Imaging device; 7. Light-emitting device; 8. Vision camera; 9. Projection device; 10. Partition; 11. Connecting shaft; 12. Control motor; 13. BIM centralized control device; 14. Rotating shaft; 15. Connection port; 16. Connecting plate; 17. Connecting component; 18. Rotating plate; 19. Connection port; 20. Light-emitting unit; 21. PDLC board; 22. Reflector; 23. Light-blocking glass plate. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] The embodiments of the present invention will now be described.

[0024] A BIM-based tilt detection device for construction, such as Figure 1-5 As shown, its core objective is to address the technical problems of existing construction tilt detection methods, such as low efficiency, high subjectivity, and disconnect from digital design models. Through hardware integration and software control, this device achieves real-time visualization projection and automatic image analysis and comparison of BIM design standards on the construction site.

[0025] The device mainly includes the main body 1, imaging device 6, projection device 9, vision camera 8, and BIM control device 13.

[0026] The main body 1 of the device constitutes the outer shell and support frame of the entire device, and its interior forms a cavity to accommodate other functional components. Multiple support rods 3 are fixedly connected to the bottom of the main body 1, and these support rods 3 together form the support base of the device. To ensure the accuracy of the detection benchmark, at least one of the support rods 3 is designed to be telescopic. Specifically, in a preferred embodiment, the telescopic support rod 3 is connected to a precision adjustment assembly. This adjustment assembly includes a mounting box 4 fixed to the side of the support rod 3, a transmission gear (not otherwise labeled) installed inside the mounting box 4, and a transmission rod (not otherwise labeled) arranged axially inside the support rod 3 that meshes with the transmission gear. A rotating handle 5 is installed on the outside of the mounting box 4, and the shaft of the rotating handle 5 extends into the mounting box 4 and connects to the transmission gear. By manually rotating the rotating handle 5, the transmission gear can be driven to rotate, thereby causing the meshing transmission rod to move axially along the support rod 3, thus achieving the length adjustment of the support rod 3. By adjusting the lengths of the multiple support rods 3 respectively, the overall levelness of the main body 1 can be adjusted. To assist in leveling, a high-precision electronic level 2 is preferably installed on the outer surface of the main body 1 of the device. The operator can intuitively adjust the device precisely by operating each handle 5 according to the reading of the electronic level 2.

[0027] The imaging device 6 is mounted on one side of the main body 1, preferably a vertical side. This imaging device 6 acts as a composite optical screen, used to simultaneously receive projected images and / or display auxiliary light emitted internally. In a detailed embodiment, the imaging device 6 includes a transparent rigid substrate (e.g., tempered glass or transparent acrylic sheet). A polymer dispersed liquid crystal panel (PDLC panel) 21 is attached to the side of the substrate facing inwards or within the internal interlayer. The PDLC panel 21 can be frosted when not powered, effectively scattering backlight, and becomes transparent when powered; this characteristic helps optimize the contrast of the projected image under different environments. On the side of the imaging device 6 away from the projection device 9, i.e., its outer surface, a light-blocking glass panel 23 is further laid. This light-blocking glass panel 23 is mainly used to reduce interference from external ambient light and protect the internal structure. The interior of the imaging device 6 also has multiple independent, vertically arranged channels etched or processed. These channels correspond one-to-one with the light-emitting units 20 described later. Each channel has multiple reflectors 22 arranged from top to bottom. The reflectors 22 can be miniature reflectors or prisms, used to change the light path.

[0028] Inside the main body 1 of the device, there is a vertical partition 10. This partition 10 roughly divides the internal cavity of the main body 1 into two main parts: a first chamber (imaging chamber) closer to the imaging device 6 and a second chamber (control chamber) farther away from the imaging device 6. On the side of the partition 10 facing the imaging device 6, the vision camera 8 and the projection device 9 are mounted side by side. The vision camera 8 is preferably a high-resolution industrial digital camera, which is rotatably connected to the partition 10 via a rotatable gimbal mechanism (e.g., via bearings), allowing its shooting angle to be adjusted. The projection device 9 is preferably a short-throw DLP or LCD projector, with its lens facing the imaging device 6 and fixedly connected to the partition 10.

[0029] The BIM centralized control device 13 is located in the second chamber. Essentially, the BIM centralized control device 13 is an integrated device that combines a computing unit (such as an industrial computer), a storage unit, a communication module, and control circuitry. It communicates with an external BIM server or local storage device via wired (such as a data cable) or wireless (such as Wi-Fi or 5G) means to obtain the BIM model data of the component to be inspected. The BIM centralized control device 13 is connected to the projection device 9 via a video signal cable (its interface can be represented as connector 15) to send the processed BIM component's model plan view from a specific perspective (such as a front view) to the projection device 9 for projection. Simultaneously, the BIM centralized control device 13 is connected to the vision camera 8 via a data cable to receive image data acquired by the camera. The BIM centralized control device 13 runs dedicated image processing and analysis software. This software can perform feature extraction, registration, and deviation calculation on the received image, which includes the projection baseline (from the BIM model) and the actual component edges (from the site), thereby automatically determining the tilt angle or displacement of the component in the horizontal and vertical directions, completing the tilt detection analysis.

[0030] In order to rigidly connect the vision camera 8 with the BIM centralized control device 13 and achieve linkage adjustment, a set of driving mechanisms is provided in this embodiment. Specifically, the BIM centralized control device 13 is fixedly connected to one end of a number of connecting plates 16 through connectors 17 provided at the four corners of its housing. The other end of the connecting plate 16 is fixedly connected to a vertically arranged connecting shaft 11. The connecting shaft 11 is rotatably installed on the inner wall of the device main body 1 through bearings (not shown). A rotating shaft 14 coaxially penetrates through the connecting shaft 11, and synchronous rotation between the two can be achieved through key grooves or tight fits, etc., or indirectly transmitted through a reduction gear set. The bottom end of the rotating shaft 14 is connected to the output shaft of a control motor 12 fixed on a partition plate 10. When the control motor 12 is started, it drives the rotating shaft 14 to rotate, and then带动 the connecting shaft 11 to rotate synchronously. The rotation of the connecting shaft 11 is transmitted through the connecting plate 16 and the connector 17, and finally带动 the entire BIM centralized control device 13 and the vision camera 8 fixed thereon (the vision camera 8 is fixedly connected to the housing of the BIM centralized control device 13 through a bracket) to rotate around the axis of the rotating shaft 14, thereby achieving precise electric adjustment of the shooting and projection angles. On the inner wall of the device main body 1, an arc-shaped rotating plate 18 is provided in cooperation with the rotation trajectory of the BIM centralized control device 13. One end of the BIM centralized control device 13 far from the partition plate 10 (for example, its rear panel) is fixedly connected or in sliding contact with the rotating plate 18, and the rotating plate 18 itself is rotatably connected to the device main body 1 through bearings, providing stable support for the rotation of the BIM centralized control device 13. On the rotating plate 18, a number of connection ports 19 are also provided, and these connection ports 19 are connected to the corresponding interfaces (such as power supply interfaces, network interfaces, external display interfaces) on the BIM centralized control device 13, facilitating the connection of external power lines, network cables or data processing terminals.

[0031] In addition, inside the device main body 1, in the first chamber located between the partition plate 10 and the imaging device 6, the light-emitting device 7 is also provided. The light-emitting device 7 is composed of a number of light-emitting units 20 arranged in an array (such as LED lamp beads), and its installation positions are precisely aligned with the channel entrances inside the imaging device 6 one by one. After the light emitted by the light-emitting units 20 enters the corresponding channels, it is reflected step by step by a number of reflectors 22 arranged from top to bottom in the channels, and finally uniformly emitted from the front of the imaging device 6 (i.e., the side of the PDLC plate 21), forming a bright and uniform background light or auxiliary positioning grid lines. This set of internally generated auxiliary lines can be superimposed on the reference lines projected by the BIM model to jointly form a detection reference system. Especially when the ambient light is relatively dim or the projection contrast is insufficient, it can ensure that the vision camera 8 can clearly capture the necessary reference features.

[0032] The working process of the device of this invention is as follows: First, the device is placed in front of the component to be inspected (such as a column or wall), and the device itself is precisely leveled using the adjustment components of the electronic level 2 and the support rod 3. The device is then activated, and the BIM control device 13 acquires the BIM model of the target component from the outside and generates its precise two-dimensional outline (i.e., model plan view) from the inspection perspective. This outline is projected onto the imaging device 6 via the projection device 9. Simultaneously, the light-emitting device 7 can be controlled to illuminate, forming auxiliary background light or a grid on the imaging device 6. The operator can roughly adjust the position of the device to make the projected BIM outline roughly coincide with the outline of the actual component behind it. Then, the vision camera 8 performs high-definition acquisition of the composite image (containing the projected BIM baseline and the image of the actual component) on the imaging device 6 and transmits the image to the BIM control device 13. The image analysis algorithm within the BIM control device 13 automatically identifies and extracts the projected baseline and the edge of the actual component, calculates the angular deviation or positional offset between them, and thus accurately and quantitatively determines the construction tilt error of the component. If the detection angle needs to be adjusted, the vision camera 8 and the projection system can be rotated synchronously by controlling the motor 12, without moving the entire device.

[0033] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A BIM-based tilt detection device for construction, characterized in that, include: Device body (1); An imaging device (6) is disposed on one side of the main body (1) of the device; The projection device (9) and the visual camera (8) are arranged side by side inside the main body (1) of the device and face the imaging device (6). The BIM central control device (13) is installed inside the main body (1) of the device and is communicatively connected to the projection device (9) and the visual camera (8); The BIM control device (13) is used to acquire BIM model data and control the projection device (9) to project the model plan view of the BIM component onto the imaging device (6); the vision camera (8) is used to acquire the projected image presented on the imaging device (6) and transmit the image data to the BIM control device (13) for tilt detection analysis.

2. The BIM-based tilt detection device for construction as described in claim 1, characterized in that: It also includes a light-emitting device (7), which is located inside the main body (1) of the device and faces the imaging device (6) to provide backlight or auxiliary light to the imaging device (6).

3. The BIM-based tilt detection device for construction as described in claim 1, characterized in that: The device body (1) is provided with a partition (10), which divides the interior of the device body (1) into a first chamber facing the imaging device (6) and a second chamber facing away from it; the vision camera (8) and the projection device (9) are located on the side of the partition (10) facing the imaging device (6), and the BIM control device (13) is located in the second chamber and is fixedly connected to the vision camera (8).

4. The BIM-based tilt detection device for construction as described in claim 3, characterized in that: It also includes a drive mechanism for driving the vision camera (8) and the BIM control device (13) to rotate in order to adjust the shooting angle; The drive mechanism includes a control motor (12), a rotating shaft (14), and a connecting shaft (11). The control motor (12) is mounted on the partition plate (10). The rotating shaft (14) is connected to the output end of the control motor (12). The connecting shaft (11) is sleeved on the rotating shaft (14) and is indirectly or directly connected to it. The BIM control device (13) is connected to the connecting shaft (11) through a connector (17) and a connecting plate (16), so that the control motor (12) can drive the BIM control device (13) and the vision camera (8) to rotate synchronously through the rotating shaft (14) and the connecting shaft (11). The main body 1 of the device is provided with a rotating plate (18) in cooperation with the BIM control device (13). The rotating plate (18) is rotatably connected to the main body of the device (1). The rotating plate (18) is provided with several connection ports (15) in cooperation with the BIM control device (13) away from the BIM control device (13).

5. A BIM-based tilt detection device for construction according to claim 2, characterized in that: The imaging device (6) includes a transparent substrate, on which a PDLC plate (21) is attached either to the side facing the projection device (9) or inside the substrate.

6. The BIM-based tilt detection device for construction as described in claim 5, characterized in that: The imaging device (6) has multiple channels inside, and the light-emitting device (7) includes multiple light-emitting units (20) corresponding to the channels. Each channel has multiple reflectors (22). The light emitted by the light-emitting unit (20) is reflected by the reflector (22) and then emitted.

7. The BIM-based tilt detection device for construction as described in claim 1, characterized in that: It also includes a leveling mechanism, which includes multiple support rods (3), at least one of the support rods (3) being a telescopic structure; the main body (1) of the device is equipped with an electronic level (2).

8. A BIM-based tilt detection device for construction according to claim 7, characterized in that: The retractable support rod (3) is connected to an adjustment assembly, which includes a mounting box (4) disposed on one side of the support rod (3), a transmission gear disposed in the mounting box (4), a transmission rod disposed in the support rod (3) and meshing with the transmission gear, and a handle (5) disposed on the outside of the mounting box (4) for manually driving the transmission gear.

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