Multi-source image data fusion acquisition device

Abstract

This utility model discloses a multi-source image data fusion acquisition device, including a housing (5), an integrated 3D camera system (1) fixed inside the housing (5), a separate line array camera (2) and an area array camera (3) fixed inside the housing (5), and a laser (4) fixed to a key position inside the housing (5) via a through-type support plate. The housing (5) has windows for the corresponding areas of the line array camera (2), the area array camera (3), the laser (4), and the 3D camera system (1), and high-transparency quartz glass is installed at the window positions. The housing (5) is equipped with an active and passive heat dissipation system, which includes a camera connector made of a high thermal conductivity material and two active heat sinks. This device can realize synchronous acquisition of multi-source data, adapt to harsh environments, ensure stable operation of the equipment, and meet the needs of rapid detection of surface defects in bridges and roads.

Description

Technical Field

[0001] The embodiments of this utility model belong to the field of bridge health monitoring technology, and more specifically, relate to a multi-source image data fusion acquisition device. Background Technology

[0002] Bridges are vital nodes in the national transportation network, and their structural safety is directly related to the safety of people's lives and property and the operation of the national economy. With increasing service life, bridges are constantly exposed to heavy traffic, extreme climates, and complex corrosive environments, making them prone to cracks, corrosion, fatigue damage, and other defects. Traditional manual inspection methods suffer from drawbacks such as low efficiency, strong subjectivity, limited coverage, and difficulty in operating in harsh weather conditions, and also lack sufficient accuracy in identifying hidden defects. Furthermore, existing image acquisition equipment mostly operates with a single sensor (such as using only a standard area array camera to capture surface images, or relying solely on a 3D scanner to acquire structural data), lacking multi-source data fusion designs specifically for bridge monitoring scenarios. On the one hand, a single device cannot simultaneously meet the multi-dimensional requirements of surface texture details, three-dimensional structural morphology, and large-area rapid scanning, resulting in insufficient data integrity. On the other hand, when multiple devices collect data separately, problems such as spatiotemporal asynchrony and low data matching accuracy easily arise, and the low integration of equipment and complex installation and maintenance make it difficult to adapt to the harsh environment of long-term outdoor bridge monitoring. Therefore, in response to the urgent need for high-precision, all-weather, and full-coverage data collection in bridge health monitoring, there is a pressing need for a fusion acquisition device that can integrate multi-source image sensors, achieve synchronous acquisition, adapt to harsh environments, and be stable and reliable, so as to provide high-quality basic data support for the rapid detection and accurate assessment of bridge defects. Utility Model Content

[0003] To address the aforementioned deficiencies or improvement needs of existing technologies, this utility model provides a multi-source image data fusion acquisition device. By integrating and fixing a 3D camera system, a line scan camera, an area scan camera, and a laser within a housing, the laser projects light to supplement the acquisition area. Each camera works synchronously to acquire data from multiple angles, providing comprehensive and accurate multi-source data support for the detection of surface defects in bridges and roads.

[0004] To achieve the above objectives, this utility model discloses a multi-source image data fusion acquisition device, including a housing, an integrated 3D camera system fixed within the housing, a line scan camera and an area scan camera separately fixed within the housing, and a laser fixed to key positions inside the housing via a through-type support plate. The housing has windowed openings in corresponding areas of the line scan camera, area scan camera, laser, and 3D camera system, with high-transparency quartz glass installed at the window positions. The housing is equipped with a combined active and passive heat dissipation system, which includes a camera connector made of a high thermal conductivity material and two active heat sinks.

[0005] Furthermore, the windows of the 3D camera system, line scan camera, and area scan camera are enclosed using a sunken support design and fixed with clamps; the laser window is not enclosed or uses thinner quartz glass and is also fixed with clamps.

[0006] Furthermore, in the heat dissipation system, the active heat sink for the 3D camera system adopts direct internal airflow heat dissipation, while the active heat sink for the line scan camera and area scan camera adopts external airflow heat dissipation; the ventilation openings of the housing adopt a uniformly distributed circular hole design and are equipped with rain shields.

[0007] Furthermore, the 3D camera system adopts an integrated fixing method, with its camera body fixing component connected to the lens fixing component. The camera body is connected to the inner fixing component and camera fixing component of the outer shell through the axial rotating component. The adjustment angle range of the 3D camera system is 0-60°.

[0008] Furthermore, the line scan camera and the area scan camera are fixed separately. The camera main unit is directly fixed to the outer shell through a connector, and the camera lens is fixed with an integrated fixing ring, which also fixes the viewing window glass.

[0009] Furthermore, the outer casing is provided with a wiring entrance, which adopts an arc-shaped design.

[0010] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects: (1) The multi-source image data fusion acquisition device of this utility model fixes the 3D camera system, line array camera, area array camera and laser in the shell through a precision bracket, optimizes the space utilization to reduce the acquisition blind zone, and designs a synchronous arrangement scheme for the acquisition consistency of line array camera and area array camera, which solves the problem of lack of multi-source image acquisition device fusion design and difficulty in realizing multi-source data synchronous acquisition in the prior art. The sensors of this utility model can acquire data synchronously from multiple angles, providing comprehensive and accurate multi-source data support for the detection of bridge and road surface defects.

[0011] (2) The multi-source image data fusion acquisition device of this utility model solves the problems of large light loss and color influence and poor acquisition effect under low light conditions by using the technical means of co-design of window glass and laser. High-transparency quartz glass is installed in the housing area corresponding to each camera and laser to reduce light loss and color influence. The laser can supplement the light of the acquisition area, especially when the light is insufficient, to enhance the image clarity and ensure that the line scan camera, area scan camera and 3D camera system can acquire high-quality image data under different lighting conditions, thereby improving the image acquisition quality.

[0012] (3) The multi-source image data fusion acquisition device of this utility model uses a high thermal conductivity material for the camera connector to achieve passive heat dissipation. At the same time, two active heat sinks are installed. For the 3D camera with high heat generation, direct internal air blowing is used for heat dissipation, and for the linear array and area array cameras with low heat generation, external air blowing is used for heat dissipation, forming a targeted heat dissipation scheme. By using a differentiated heat dissipation system that combines active and passive heat dissipation, the problem of unstable equipment operation caused by the difference in heat generation characteristics of different cameras is solved, ensuring the stable operation of each component, avoiding the impact of heat accumulation on equipment performance, and ensuring the continuous and stable progress of acquisition work.

[0013] (4) The multi-source image data fusion acquisition device of this utility model has a shell made of high-strength material and coated with anti-corrosion coating, which can resist the erosion of harsh external environment. At the same time, waterproof glue is used to treat each installation hole to effectively block rainwater and moisture from entering, ensuring stable operation of the equipment in complex outdoor environments such as bridges and extending the service life of the equipment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a multi-source image data fusion acquisition device according to an embodiment of the present invention; Figure 2 This is a front view structural diagram of a multi-source image data fusion acquisition device according to an embodiment of the present invention; Figure 3 This is a schematic diagram showing the relative positions of a 3D camera system and an internal blowing fan in a multi-source image data fusion acquisition device according to an embodiment of this utility model.

[0016] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-3D camera system, 2-line scan camera, 3-area scan camera, 4-laser, 5-housing, 51-line entrance, 52-glass window, 6-internal fan. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0018] like Figure 1-3 As shown, this utility model embodiment provides a multi-source image data fusion acquisition device, including a 3D camera system 1, a line scan camera 2, an area scan camera 3, a laser 4, a housing 5, a heat dissipation system, a fixing bracket, and connectors. Each sensor is precisely fixed within the housing 5 via the fixing bracket and connectors, enabling synchronous acquisition of multi-angle, multi-source image data, improving data accuracy. Simultaneously, the heat dissipation system ensures the stability of the device's operation. Specifically, The outer casing 5 serves as the supporting base for the entire device. It is made of high-strength materials, preferably processed using sheet metal, and requires angle and flatness testing to ensure the accuracy of subsequent image acquisition. Internally, it is secured to other components via precision brackets, and its surface is coated with an anti-corrosion coating to protect internal components from harsh environments. The casing 5 adopts a side-opening, closable layout, with windows for corresponding areas of the 3D camera system 1, line scan camera 2, area scan camera 3, and laser 4. High-transparency quartz glass is installed at the viewing window positions, forming glass windows 52 to reduce light loss and color impact. The windows of the 3D camera system 1, line scan camera 2, and area scan camera 3 are closed using a sunken support design. The sunken depth should take into account the design thickness of the quartz glass, and it is fixed using clamps. The laser 4 window is not closed or uses thinner quartz glass, and the fixing method is also suitable for clamp-type fixing. The outer casing 5 is provided with a wiring inlet 51, which adopts an arc design to ensure space for multiple wiring lines, while simultaneously providing power and network signal services for the 3D camera system 1, line scan camera 2, and area scan camera 3.

[0019] The 3D camera system 1 acquires three-dimensional structural data of the bridge and road to reconstruct the three-dimensional morphology of the damaged area (such as crack depth and spalling volume). It is installed inside the housing 5 using an integrated fixing method, with the camera body and lens fixing components connected to each other, freeing up design space for camera rotation and adjustment. The camera body is connected to the housing's internal fixing components and camera fixing components via a pivot rotating component, allowing for angle adjustment within a range of 0-60°. This system is located in a separate area within the housing 5, with a corresponding window and a quartz glass viewing window installed.

[0020] Both the line scan camera 2 and the area scan camera 3 are installed inside the housing 5 using a separate fixing method. The camera main unit is directly fixed to the housing 5 via connectors, and the camera lens is fixed using an integrated fixing ring. This method of fixing the camera lens also allows for the fixing of the viewing window glass, reducing unnecessary components. Both cameras are located in the same area within the housing 5, employing a synchronous arrangement to ensure consistent data acquisition. Window openings are made at corresponding positions, and quartz glass viewing windows are installed. The line scan camera 2 acquires high-definition linear images of bridges and roads by scanning line by line, making it suitable for detecting apparent defects (such as cracks and scratches) in long-distance, fast-moving scenarios. The area array camera 3 acquires two-dimensional planar images, capturing the texture details of the disease (such as color changes and the extent of peeling), which complements the data from the line array camera.

[0021] The laser 4 is fixed inside the housing 5 by a through-type support plate. The support plate is located in a key position of the housing, which not only enhances the overall load-bearing capacity but also provides a stable mounting base and sufficient space for the laser. Its window is not closed or uses thin quartz glass and is fixed by a clamp. The laser 4 emits laser light (such as structured light or supplementary light source) to enhance the image acquisition effect when the ambient light is insufficient. Specifically, the light spots or stripes formed by the laser beam projected onto the bridge surface are captured by the 3D camera system 1 and used to calculate the three-dimensional coordinates of the object surface, improving the accuracy of the point cloud data. At the same time, laser supplementary lighting can improve image contrast, making the linear scan data of the line scan camera 2 and the texture data of the area scan camera 3 clearer, especially reducing noise in shadow or backlit scenes.

[0022] All mounting holes of the outer casing 5 are sealed with waterproof adhesive.

[0023] This invention integrates multiple sensors to optimize space utilization and reduce blind spots. The outer casing is coated with an anti-corrosion coating to withstand harsh environments and extend the device's lifespan. The multi-device layout prioritizes systems with high installation complexity, such as the 3D camera system 1, employing a modular design for easy disassembly and maintenance. Furthermore, a synchronized arrangement scheme is designed to address the consistency issues in data acquisition between the line scan camera 2 and the area scan camera 3.

[0024] This device also features a cooling system employing a combination of active and passive heat dissipation design. The layout is differentiated to address the varying heat generation characteristics of different cameras, ensuring all components operate at stable temperatures. Camera connectors utilize highly thermally conductive materials to rapidly transfer heat generated during camera operation from the camera body to the outer shell or heat dissipation components, maximizing the camera's heat dissipation capacity. In addition to passive cooling, two active heat sinks are installed. For the 3D camera system 1, which generates significant heat, a direct internal airflow design is used. An internal fan 6 is installed on the outer shell 1, forcing airflow across the camera surface to quickly remove heat transferred from the camera body to the outer shell. This also accelerates internal air circulation, preventing heat buildup in confined spaces and enhancing the camera's active cooling capacity. For the line scan camera 2 and area scan camera 3, which generate less heat, external airflow is used, creating a closed-loop airflow channel for heat dissipation. The ventilation openings feature evenly distributed circular holes to prevent debris from entering, and rain covers are included to adapt to various working environments and enable all-weather operation.

[0025] During installation, the device as a whole is fixed to the supporting device using a bottom-mounted method. Considering the impact of the supporting device on the data acquisition, an top-mounted installation can be used according to actual needs. When the multi-source image data fusion acquisition device of this utility model is working, the outer shell 5 serves as the supporting base, and the 3D camera system 1, linear array camera 2, area array camera 3, and laser 4 are fixed by a precision bracket. Each component works collaboratively under the protection of the outer shell and the support of the heat dissipation system: the laser 4 projects light to supplement the acquisition area or provide structured light reference; the linear array camera 2 scans line by line to acquire linear appearance data of the bridge surface; the area array camera 3 captures two-dimensional texture details; and the 3D camera system 1 acquires three-dimensional structural information. The three work synchronously to achieve spatiotemporal matching of multi-source data. At the same time, the active and passive heat dissipation system is specifically designed to provide internal cooling for the high-heat 3D camera and external cooling for the low-heat linear array and area array cameras, ensuring stable operation of the equipment. Finally, the multi-dimensional image data is fused to meet the needs of rapid detection of surface defects of bridges and roads.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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 utility model based on the specific circumstances.

[0027] In this utility model, terms indicating direction or location are used, such as top, bottom, outside, inside, parallel, vertical, left, right, up, down, etc., to indicate relative position rather than absolute position.

[0028] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-source image data fusion acquisition device, characterized in that, The system includes a housing (5), an integrated 3D camera system (1) fixed inside the housing (5), a separate line array camera (2) and an area array camera (3) fixed inside the housing (5), and a laser (4) fixed to a key position inside the housing (5) via a through-type support plate. The housing (5) has windows for the corresponding areas of the line array camera (2), the area array camera (3), the laser (4), and the 3D camera system (1), and high-transparency quartz glass is installed at the window positions. The housing (5) is equipped with a combined active and passive heat dissipation system, which includes a camera connector made of a high thermal conductivity material and two active heat sinks.

2. The multi-source image data fusion acquisition device according to claim 1, characterized in that, The windows of the 3D camera system (1), the line scan camera (2) and the area scan camera (3) are closed with a sunken bearing design and fixed with a clamp; the window of the laser (4) is not closed or uses thinner quartz glass and is also fixed with a clamp.

3. The multi-source image data fusion acquisition device according to claim 2, characterized in that, In the heat dissipation system, the active heat sink for the 3D camera system (1) adopts direct internal air blowing heat dissipation, and the active heat sink for the line array camera (2) and the area array camera (3) adopts external air blowing heat dissipation; the ventilation opening of the outer shell (5) adopts a uniformly distributed circular hole design and is equipped with a rain cover.

4. The multi-source image data fusion acquisition device according to any one of claims 1-3, characterized in that, The 3D camera system (1) adopts an integrated fixing method, with its camera body fixing component connected to the lens fixing component. The camera body is connected to the inner fixing component and camera fixing component of the outer shell (5) through the axial rotating component. The adjustment angle range of the 3D camera system (1) is 0-60°.

5. The multi-source image data fusion acquisition device according to any one of claims 1-3, characterized in that, The line array camera (2) and the area array camera (3) are fixed separately. The camera host is directly fixed to the outer shell (5) through the connector. The camera lens is fixed with a one-piece fixing ring, and the one-piece fixing ring also fixes the viewing window glass.

6. The multi-source image data fusion acquisition device according to any one of claims 1-3, characterized in that, The outer casing (5) is provided with a line entrance (51), which adopts an arc-shaped design.

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