An image acquisition device

Abstract

The utility model relates to tunnel detection technical field discloses an image acquisition device, include: first casing, second casing, camera assembly and light emission device, camera assembly sets up in first casing, light emission device sets up in second casing, camera assembly with light emission device passes through the cable connection, the utility model discloses through setting up camera assembly in first casing, setting up light emission device in second casing, has realized the independent setting of light emission device and camera assembly, avoided the influence that the heat dissipation of light emission device to camera assembly, makes light emission device can adopt high -power, improved the light intensity of light emission device and the image quality of acquisition.

Description

Technical Field

[0001] This utility model relates to the field of tunnel detection technology, and in particular to an image acquisition device. Background Technology

[0002] Tunnels, as crucial nodes in highways, railways, and urban underground transportation, directly impact public safety and property. For example, lining detachment or leakage in railway tunnels can lead to train stoppages or even accidents. Currently, many tunnels are in their late service stages, with structural defects gradually becoming apparent. Simultaneously, natural disasters such as earthquakes and floods exacerbate the risk of structural damage. Traditional manual inspections, relying on manual tapping and visual checks, are inefficient and prone to missing hidden defects, making it difficult to detect potential hazards in a timely manner. In recent years, tunnel inspection technologies based on image acquisition and defect identification have gradually developed. The inspection process requires vehicles carrying tunnel inspection equipment to conduct inspections while the tunnel is in motion. To improve the supplementary lighting effect, existing tunnel inspection vehicles typically use large trucks to reduce the object distance for image acquisition. While low-power supplementary lighting sources can meet the requirements, using large trucks presents problems such as high cost, inconvenient operation, and poor flexibility. To achieve miniaturization of tunnel inspection vehicles, smaller trucks need to be selected as the mounting platform. In this case, the distance between the image acquisition device and the tunnel surface increases. To meet the supplementary lighting requirements, high-power lasers need to be selected as the supplementary lighting source. However, high-power lasers have the problem of severe heat generation. Therefore, it is necessary to find a new image acquisition device that can simultaneously solve the problems of supplementary lighting and heat dissipation. Utility Model Content

[0003] In view of this, the present invention provides an image acquisition device.

[0004] Specifically, the following technical solutions are included:

[0005] This application provides an image acquisition device, including:

[0006] First housing, second housing, camera assembly, and light emitting device;

[0007] The camera assembly is disposed in the first housing;

[0008] The light emitting device is disposed in the second housing;

[0009] The camera assembly and the light emitting device are connected by a cable.

[0010] Preferably, the camera assembly includes a laser optical structure;

[0011] The cable includes optical fiber;

[0012] The laser optical structure and the light emitting device are connected by an optical fiber.

[0013] Preferably, the photosensitive band of the camera component is the first band, and the emission band of the light emitting device is located in the first band.

[0014] Preferably, the camera assembly includes a lens and a filter, wherein the filter has a first wavelength band and the filter is disposed on the lens.

[0015] Preferably, the camera in the camera assembly is a photosensitive camera, and the photosensitive band of the photosensitive camera is the first band.

[0016] Preferably, the image acquisition device further includes a wave-absorbing material;

[0017] The absorbing material is disposed on the first housing, the second housing, and the cable.

[0018] Preferably, the absorbing material is at least one of coating, film, foam, and fabric.

[0019] Preferably, both the first housing and the second housing are made of metal.

[0020] Preferably, the object distance of the camera assembly is less than or equal to 5.2 meters.

[0021] Preferably, the power of the light emitting device is less than or equal to 50W.

[0022] The beneficial effects of the technical solution provided by this utility model include at least the following:

[0023] This invention achieves independent setup of the light emitting device and the camera assembly by placing the camera assembly in the first housing and the light emitting device in the second housing. This avoids the impact of heat dissipation from the light emitting device on the camera assembly, allowing the light emitting device to use high power, thus improving the light intensity of the light emitting device and the quality of the acquired image. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of an image acquisition device according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the first housing structure according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of another structure of the first housing according to one embodiment of the present invention;

[0028] Figure 4 This is a cross-sectional view of the first housing structure according to an embodiment of the present invention.

[0029] The reference numerals in the figure are respectively:

[0030] 100. First housing; 200. Second housing; 1. Cover; 2. First outer shell; 3. Connecting plate; 4. Second outer shell; 5. Camera; 6. Laser optical structure; 7. Cable; 8. First wire fixing structure; 9. Second wire fixing structure.

[0031] The accompanying drawings illustrate a specific embodiment of the present invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0033] Before further describing the embodiments of this utility model in detail, the directional terms involved in the embodiments of this utility model, such as "upper part," "lower part," and "side part," are used to refer to... Figure 1 The orientation shown is a reference and does not limit the scope of protection of this utility model.

[0034] To make the technical solution and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0035] like Figures 1 to 4As shown, this embodiment provides an image acquisition device installed on a tunnel inspection vehicle, including: a first housing 100, a second housing 200, a camera assembly, and a light emitting device; the camera assembly is disposed in the first housing 100; the light emitting device is disposed in the second housing 200; the camera assembly and the light emitting device are connected by a cable 7. This application achieves independent installation of the light emitting device and the camera assembly by placing the camera assembly in the first housing 100 and the light emitting device in the second housing 200, avoiding the impact of heat dissipation from the high-power light emitting device on the camera assembly, allowing the light emitting device to use high power, improving the light intensity of the light emitting device and the quality of the acquired image. Simultaneously, it facilitates the miniaturization and weight reduction of the image acquisition device, making it suitable for installation on a small truck.

[0036] Specifically, such as Figure 2 , Figure 3 and Figure 4 As shown, the first housing 100 includes a cover 1, a first outer shell 2, a second outer shell 4, and a connecting plate 3. The cover 1 has a rectangular viewing window. The first outer shell 2 is a rectangular cylindrical structure. The cover 1 and the first outer shell 2 are connected, with the cover 1 covering one end of the first outer shell 2. The connecting plate 3 is connected to the other end of the first outer shell 2, and the camera assembly is mounted on the connecting plate 3. The first outer shell 2 is located on one side of the connecting plate 3, and the second outer shell 4 is located on the other side of the connecting plate 3. A first wire-fixing structure 8 and a second wire-fixing structure 9 are provided on the outer side of the second outer shell 4. The first wire-fixing structure 8 and the second wire-fixing structure 9 are used to fix the cable 7. In this embodiment, the cable 7 includes optical fibers, electrical wires, and signal lines, and is configured according to requirements. The first wire-fixing structure 8 is used to fix the electrical wires and signal lines connecting the camera 5, and the second wire-fixing structure 9 is used to fix the optical fibers connecting the laser optical structure 6.

[0037] Preferably, the image acquisition device further includes an industrial control computer, and the camera assembly and light generating device are electrically connected to the industrial control computer via signal lines and power lines. The industrial control computer is located in the second housing 200.

[0038] Furthermore, the light emitting device is a laser.

[0039] Preferably, the camera assembly includes a camera 5 and a laser optical structure 6; the camera 5 and the industrial control computer are electrically connected via signal lines and power lines. The laser optical structure 6 and the light emitting device are connected via optical fiber.

[0040] Preferably, the image acquisition device in this application is used in tunnel inspection. By independently encapsulating the light emitting device, the volume of the first housing 100 can be reduced, further reducing the size of the tunnel inspection device. This achieves miniaturization and weight reduction of the tunnel inspection device, making it compact enough to be mounted on a small truck, eliminating the need for a large truck and effectively improving the convenience, mobility, and energy efficiency of tunnel inspection. When the tunnel inspection device is mounted on a small truck, the tunnel ceiling height is 7 to 7.3 meters, the object distance of the camera assembly is less than or equal to 5.2 meters, and the maximum effective working distance of the camera assembly is 5.2 meters. The object distance between the camera 5 and the tunnel surface is relatively large, requiring a high-power supplementary light source. A conventional 30W light emitting device is insufficient. In this application, the laser and camera assembly are separated, avoiding the limitation on the supplementary light source power caused by the laser's heat when both are housed in the same housing. Furthermore, increasing the power of the supplementary light source effectively increases its beam distance. When the camera 5 is far from the tunnel surface, the object distance of the camera 5 is large, necessitating a high-power supplementary light source for effective imaging. Meanwhile, the increased power of the supplementary light source enhanced the intensity of the supplementary light and the quality of the acquired images.

[0041] The power of the optical emitting device in this application is less than or equal to 50W.

[0042] Specifically, in this embodiment, the photosensitive wavelength of the camera assembly is the first wavelength, and the emission wavelength of the light emitting device is also located in the first wavelength. Specifically, the camera assembly includes a lens and a filter, the filter's filtering wavelength is the first wavelength, and the filter is disposed on the lens. Alternatively, the camera 5 in the camera assembly is a photosensitive camera, and the photosensitive wavelength of the photosensitive camera is the first wavelength. Therefore, the camera 5 can only receive light from the first wavelength, blocking other wavelengths, significantly improving the supplementary lighting effect while saving energy consumption. Lower power consumption generates less heat, effectively reducing heat dissipation pressure, and facilitating device miniaturization within a low-power system. In this application, the light wavelength within the first wavelength is 600 to 700 nm; preferably, the photosensitive wavelength of the camera assembly is 640 nm, and the emission wavelength of the light emitting device is 640 nm.

[0043] Specifically, the image acquisition device also includes a microwave absorbing material; this material is disposed on the first housing 100, the second housing 200, and the cable 7. The microwave absorbing material effectively reduces signal interference from the signal enhancement device during image acquisition, effectively solving problems such as image loss and data blurring, resulting in good image quality. Furthermore, the cable 7 includes an optical fiber and a data transmission line, with the microwave absorbing material disposed on the data transmission line. The data transmission line connects the camera 5 of the camera assembly to the industrial control computer for image transmission.

[0044] Specifically, the absorbing material is at least one of the following: coating, film, foam, and fabric.

[0045] Furthermore, both the first housing 100 and the second housing 200 are made of metal. This further reduces electromagnetic interference from the signal enhancement device during image acquisition.

[0046] Specifically, the first housing 100 also includes an alignment structure, which is connected to the laser optical structure 6. The alignment structure is used to adjust the target line of the camera 5 and the projection line of the laser optical structure 6 to be on the same straight line. The camera 5 is a line scan camera.

[0047] In this application, the first housing 100 contains only the laser optical structure 6 and the camera 5, with fewer internal components and a smaller size. Therefore, the volume of the first housing 100 can be directly reduced, thus decreasing the installation space required. In this application, the light emitting device and the laser optical structure 6 are separated, with the light emitting device separately housed in the second housing 200. This allows for effective heat dissipation of the light emitting device, making it suitable for high-power lasers and enabling long-distance image acquisition, thereby improving the brightness of the supplementary lighting. The image acquisition device in this application can utilize a 50-watt high-power laser, effectively increasing the object distance for tunnel detection.

[0048] In this application, the power of the supplementary light source is relatively large, and the driving speed of the inspection vehicle can also be appropriately increased. Therefore, the image inspection device is suitable for image acquisition of different surfaces of highway tunnel lining, especially for cracks that can be clearly seen on black fireproof coating surfaces.

[0049] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0050] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0051] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An image acquisition device, installed on a tunnel inspection vehicle, characterized in that, include: First housing, second housing, camera assembly, and light emitting device; The camera assembly is disposed in the first housing; The light emitting device is disposed in the second housing; The camera assembly and the light emitting device are connected by a cable.

2. The image acquisition device according to claim 1, characterized in that, The camera assembly includes a laser optical structure; The cable includes optical fiber; The laser optical structure and the light emitting device are connected by an optical fiber.

3. The image acquisition device according to claim 1, characterized in that, The photosensitive band of the camera component is the first band, and the emission band of the light emitting device is located in the first band.

4. The image acquisition device according to claim 1, characterized in that, The camera assembly includes a lens and a filter, wherein the filter has a first wavelength band and is disposed on the lens.

5. The image acquisition device according to claim 1, characterized in that, The camera in the camera assembly is a photosensitive camera, and the photosensitive band of the photosensitive camera is the first band.

6. The image acquisition device according to claim 1, characterized in that, The image acquisition device also includes wave-absorbing material; The absorbing material is disposed on the first housing, the second housing, and the cable.

7. An image acquisition device according to claim 6, characterized in that, The absorbing material is at least one of the following: coating, film, foam, and fabric.

8. The image acquisition device according to claim 1, characterized in that, Both the first housing and the second housing are made of metal.

9. An image acquisition device according to claim 1, characterized in that, The object distance of the camera assembly is less than or equal to 5.2 meters.

10. An image acquisition device according to claim 1, characterized in that, The power of the light emitting device is less than or equal to 50W.

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