Multi-lens all-dimensional core image information automatic acquisition device

Abstract

According to the multi-lens all-dimensional core image information automatic acquisition device provided by the utility model, multi-angle and all-dimensional image information acquisition of a core sample is realized through the arrangement of the table top transparent plate of the core placing table, the fixed bracket and the plurality of cameras; basic data, namely multi-view photos, required by core live-action modeling and conforming to the close-range photogrammetry principle are captured at a time, and the diffuse reflection shadowless light source and the illumination light source are improved, so that the time for data acquisition and model construction is remarkably shortened, and the core shooting and modeling efficiency and success rate are improved. According to the utility model, not only can three-dimensional live-action restoration of a rock core sample be realized, but also detailed data of the rock core can be permanently stored, the storage life of the rock core sample is greatly prolonged, the management efficiency of the rock core file is remarkably improved, and the device is simple and convenient to maintain and convenient to collect and operate. And the core data acquisition and processing are more efficient and reliable.

Description

Technical Field

[0001] This utility model belongs to the field of geological exploration technology and relates to an automated core image information acquisition device. Background Technology

[0002] In fields such as water conservancy and hydropower engineering, and geology and mining, geological exploration serves as a prerequisite and foundation for project implementation, and its importance is increasingly prominent. Core samples are cylindrical rock samples extracted from boreholes using ring drill bits and other coring tools, according to the needs of geological exploration work and engineering projects. After core collection is completed, the cores need to be transported to a core repository for storage. This physical storage not only occupies a large amount of space, but also carries the risk of gradual damage over time and with repeated handling.

[0003] The currently prevalent manual photography method for acquiring core images suffers from the following problems: First, it is difficult to acquire comprehensive and unobstructed core images: Due to the varying shapes and sizes of cores, manual photography often only captures images from limited angles, making it difficult to cover all details and features. This not only affects the overall analysis of the core but may also lead to the omission of crucial core image information, thus impacting subsequent modeling and analysis results. Second, manual acquisition is inefficient: Manual photography requires significant manpower and time for preparation, shooting, and post-processing, especially when processing large numbers of core samples, resulting in low efficiency. The problems are particularly evident in the following aspects: First, the inefficient acquisition method cannot meet the needs of large-scale core modeling, leading to delays in core data updates and processing, which severely impacts the progress of core archive establishment. Second, uneven lighting: Under natural or laboratory conditions, the reflection and shadows on the core surface can cause loss of detail in the captured images due to limitations in the direction, intensity, and color temperature of the light source. Furthermore, the material properties of the core surface can interfere with light reflection, making certain important features difficult to identify in the image. Uneven lighting not only affects image quality but also increases the difficulty of subsequent image processing and analysis. These problems make it difficult for core 3D modeling software to clearly identify image information on the core surface, increasing the risk of misjudgment and hindering rapid and accurate core 3D digital modeling, potentially even leading to modeling failure. Utility Model Content

[0004] To address the problems of manual photographic acquisition methods for core images described in the background art, such as difficulty in obtaining comprehensive and seamless core image information, low acquisition efficiency, uneven acquisition light, difficulty in achieving rapid and accurate three-dimensional digital modeling of cores, and even potential failure of three-dimensional core modeling, this utility model provides an automated acquisition device for core image information using multiple lenses and omnidirectional methods.

[0005] The device of this invention includes a fixed bracket, cameras, a diffuse reflection shadowless light source, and a core placement table. The tabletop of the core placement table is a transparent plate used to place the core. The fixed bracket is located outside the core placement table and covers it. Multiple cameras are mounted on the fixed bracket. The cameras shoot towards the core placement position on the core placement table. A diffuse reflection shadowless light source is positioned above the fixed bracket. This invention achieves automated multi-lens and omnidirectional image acquisition of the core through the transparent plate of the core placement table, the fixed bracket, and the multiple cameras. The diffuse reflection shadowless light source solves the reflection problem caused by uneven light illumination during image acquisition.

[0006] Furthermore, the fixed support is a frame structure composed of multiple hollow steel pipes spliced ​​together. Power cables and data transmission network cables for the cameras are installed inside the hollow steel pipes of the frame structure, and multiple cameras are installed on each hollow steel pipe. This fixed support structure and the arrangement of the cameras enable more efficient automated acquisition of multi-lens and omnidirectional images of the rock core.

[0007] Furthermore, the rear end of the camera is provided with an opening that allows a hollow steel pipe to pass through. This opening allows multiple cameras to be easily installed on each steel pipe.

[0008] Furthermore, the hollow steel pipes are connected by threads to facilitate the disassembly and adjustment of the mounting bracket and camera.

[0009] Furthermore, the diffuse shadowless light source is positioned at the upper part of the center of the fixed support, and is fixedly connected to the end of the telescopic rod. The placement of the diffuse shadowless light source at the upper part of the center of the fixed support reduces the impact of reflections from the transparent plate of the core placement table on the acquisition of image information below the core, and achieves uniform illumination of the core, thereby improving the shooting effect and avoiding modeling failure. The height of the diffuse shadowless light source can be adjusted via the telescopic rod, and the power cord for the light source can also be installed inside the telescopic rod for easy maintenance and adjustment.

[0010] Furthermore, the diffuse reflection shadowless light source is 0.5 meters above the top of the fixed bracket.

[0011] Furthermore, the bottom of the core placement table is equipped with casters. These casters facilitate adjustment of the core's position and its distance from the camera, ensuring accurate focusing of the core.

[0012] Furthermore, the fixed bracket is connected to the power supply integration box of the switch via a hollow connecting steel pipe, and the power bus and data transmission network cable required for the camera to be connected in series are installed inside the hollow connecting steel pipe.

[0013] Furthermore, one end of the telescopic rod is bent and connected to the top of the diffuse reflection shadowless light source, while the other end of the telescopic rod is fixed to the top of the switch power supply integration box.

[0014] Furthermore, the power supply integration box of the switch is equipped with at least the following: a power input port, a power conversion module, a network port, and a switch; the power input port is used to connect to an external power source; the power conversion module is used to convert the external power source into low-voltage DC power; the network port is composed of multiple switches connected in series and communicates with the control processing terminal; the switch is used to control the power on / off state of the entire device. Through the configuration of the power supply integration box, shooting commands can be sent to the camera and image data can be transmitted, ensuring real-time data transmission and processing.

[0015] Compared with existing technologies, this invention draws on manual photography techniques from the principles of real-scene modeling. Through the use of a transparent tabletop, fixed supports, and multiple cameras on a core placement table, it achieves multi-angle, all-around image acquisition of core samples. This invention uses multiple cameras to capture the fundamental data required for real-scene core modeling—i.e., multi-view photographs—compliant with the principles of close-range photogrammetry. Furthermore, by using diffuse, shadowless light sources and improving the lighting method, it not only provides uniform illumination but also significantly reduces glare and interference from the transparent tabletop. This allows for the acquisition of all-around images of the core surface that meet modeling requirements in a single operation, significantly reducing data acquisition and model building time and improving the efficiency and success rate of core photography and modeling. This invention solves the problems of traditional, complex, and error-prone acquisition methods, meeting the requirements of core modeling for overlap rate and shooting angle. It overcomes the technical difficulties of low efficiency, high failure rate, and incomplete shooting angles associated with traditional manual methods, achieving all-around, blind-spot-free core image information acquisition and ensuring data integrity and accuracy. This invention not only enables the three-dimensional real-scene reconstruction of core samples, but also permanently preserves detailed core data, greatly extending the preservation period of core samples and significantly improving the management efficiency of core archives. The device is easy to maintain, convenient to operate, and accurate in data acquisition, making the acquisition and processing of core data more efficient and reliable. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the device of this utility model.

[0017] Explanation of reference numerals in the attached diagram: 1-Fixed bracket; 2-Camera; 3-Diffuse reflection shadowless light source; 4-Chandelier telescopic rod; 5-Moving casters; 6-Power input port; 7-Network port; 8-Switch power supply integration box; 9-Switch; 10-Transparent panel; 11-Core placement table. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0019] like Figure 1 As shown, an automated acquisition device for multi-lens omnidirectional core image information includes a fixed bracket 1, a camera 2, a diffuse reflection shadowless light source 3, and a core placement table 11.

[0020] like Figure 1 As shown, the tabletop of the core placement table 11 is a transparent plate 10, which is used to place the core. The transparent plate 10 can be made of transparent tempered glass. The bottom of the core placement table 11 is equipped with casters 5 to facilitate the adjustment of the position of the core and its distance from the camera, ensuring that the core can be accurately focused.

[0021] like Figure 1 As shown, the fixing bracket 1 is located on the outside of the core placement table 11 and covers the core placement table 11. Multiple cameras 2 are mounted on the fixing bracket 1, with the camera 2 pointing towards the core placement position on the core placement table 11. Specifically, the fixing bracket 1 is a frame structure composed of multiple hollow steel pipes. The power supply cables and data transmission network cables for the cameras 2 are installed inside the hollow steel pipes of the frame structure. The rear end of each camera 2 has an opening that allows the hollow steel pipes to pass through. Multiple cameras 2 are mounted on each hollow steel pipe. The hollow steel pipes can be connected by threads to facilitate the disassembly and adjustment of the fixing bracket 1 and the cameras 2. In this embodiment, the fixing bracket 1 is a cubic frame structure, with all sides of the cubic frame structure being hollow steel pipes. Hollow steel pipes can be further installed on each face of the cubic frame structure to accommodate more cameras 2.

[0022] like Figure 1 As shown, a diffuse reflection shadowless light source 3 is installed above the fixed bracket 1. Specifically, the diffuse reflection shadowless light source 3 is located at the upper part of the center of the fixed bracket 1. Preferably, the vertical height of the diffuse reflection shadowless light source 3 from the upper part of the fixed bracket 1 is 0.5 meters. The diffuse reflection shadowless light source 3 is fixedly connected to the end of the telescopic rod 4. One end of the telescopic rod 4 is bent and connected to the top of the diffuse reflection shadowless light source 3. One end of the telescopic rod 4 can be fixed to the top of the switch power supply integration box 8. The height of the diffuse reflection shadowless light source 4 can be adjusted by the telescopic rod 4. The power supply cable of the light source can also be installed inside the telescopic rod 4 for easy maintenance and adjustment.

[0023] like Figure 1As shown, the fixed bracket 1 is connected to the switch power supply integration box 8 via a hollow connecting steel pipe. The power bus and data transmission network cable required for the camera 2 are housed inside the hollow connecting steel pipe. Specifically, the fixed bracket 1 and the hollow connecting steel pipe are connected by threads. The diameter of the hollow connecting steel pipe matches the size of the opening on the switch power supply integration box 8, allowing the hollow connecting steel pipe to be directly inserted into the switch power supply integration box 8. The switch power supply integration box 8 contains at least: a power input port 6, a power conversion module, a network port 7, and a switch 9. The power input port 6 is used to connect to an external power source. The power conversion module converts the external power into low-voltage DC power; typically, the power conversion module can convert 220V AC power to 12V DC power. The network port 7 consists of multiple switches connected in series and communicates with the control processing terminal. The switch 9 controls the power on / off status of the entire device. Through the configuration of the switch power supply integration box 8, shooting commands can be sent to the camera 2 and image data can be transmitted, ensuring real-time data transmission and processing.

[0024] The automated acquisition of core image information using the above-mentioned device includes the following steps:

[0025] First, inspect the equipment and prepare core samples. Specifically, the preparation of core samples includes: cleaning and drying the core, filling out the core imaging information form, and recording relevant information such as borehole number, location, core length, drilling number, start and end depths, and core diameter.

[0026] Then, the core sample is placed on the transparent plate 10 of the core placement table 11.

[0027] Next, adjust the height of the diffuse shadowless light source 3 above the fixed bracket 1 to ensure suitable lighting. Specifically, adjust the height of the diffuse shadowless light source 3 using the telescopic rod 4 to ensure suitable lighting; preferably, the vertical height of the diffuse shadowless light source 3 from the top of the fixed bracket 1 is 0.5 meters.

[0028] Next, the control camera 2 takes repeated photos of the core sample at set intervals. Specifically, the control processing terminal sends shooting commands to each camera 2 through network port 7 and network cable to take repeated photos at set intervals, so as to obtain multi-angle and all-round photos of the core sample at one time.

[0029] Finally, the core images captured by camera 2 are uploaded to the control and processing terminal.

[0030] While uploading photos and creating 3D models of the core samples, the next set of core samples can be placed and photographed. At this time, the automatic upload task and the image acquisition device can be carried out in parallel to improve work efficiency.

[0031] When the control and processing terminal fails to create a 3D real-world model of the core based on the acquired core photos, or the modeling effect is not ideal, the reasons for the failure are analyzed and improvement measures are taken, and the core sample is re-photographed.

[0032] In the process of creating a 3D real-scene model of the core, image preprocessing is performed first. The uploaded core photos are processed to remove the background and other redundant information, retaining only the main body of the core. Then, 3D real-scene modeling is performed. 3D real-scene modeling software is used to calculate and analyze the image information of the collected core photos, and aerial triangulation is performed to construct a 1:1 high-precision 3D digital real-scene model of the core, including the core columnar surface and the cross-sections on both sides. Finally, a truly comprehensive 3D real-scene model of the core is constructed.

[0033] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A multi-lens full-range core image information automatic acquisition device, characterized in that: The utility model relates to a kind of core photographing device, including fixed support (1), camera (2), diffuse reflection shadowless light source (3), core placing table (11);The tabletop of the core placing table (11) is transparent plate (10), and the transparent plate (10) is used to place core;The fixed support (1) is set to the outside of core placing table (11) and covers core placing table (11), and a plurality of cameras (2) are provided on the fixed support (1);The shooting direction of the camera (2) is towards the core placing position on core placing table (11);Diffuse reflection shadowless light source (3) is provided above the fixed support (1).

2. The multi-lens full-range core image information automatic acquisition device according to claim 1, characterized in that: The fixed support (1) is a frame structure composed of a plurality of hollow steel pipes, and the hollow steel pipes of the frame structure are provided with power supply cables and data transmission network cables of the cameras (2).

3. The multi-lens full-range core image information automatic acquisition device according to claim 2, characterized in that: The rear end of the camera (2) is provided with an opening through which the hollow steel pipe can pass.

4. The multi-lens full-range core image information automatic acquisition device according to claim 3, characterized in that: The hollow steel pipes are connected by threads.

5. The multi-lens full-range core image information automatic acquisition device according to claim 1, characterized in that: The diffuse reflection shadowless light source (3) is arranged at the upper part of the center of the fixed support (1), and the diffuse reflection shadowless light source (3) is fixedly connected with the end of the telescopic rod (4).

6. The multi-lens full-range core image information automatic acquisition device according to claim 5, characterized in that: The vertical height of the diffuse reflection shadowless light source (3) from the upper part of the fixed support (1) is 0.5 meters.

7. The multi-lens full-range core image information automatic acquisition device according to claim 1, characterized in that: The bottom of the core placing table (11) is provided with a moving roller (5). 8.The multi-lens full-range core image information automatic acquisition device according to claim 5, characterized in that: The fixed support (1) is connected with the switch power supply integrated box (8) through a hollow connecting steel pipe, and the hollow connecting steel pipe is provided with a power bus and a data transmission network cable required for camera (2) series connection in the inside.

9. The multi-lens full-range core image information automatic acquisition device according to claim 8, characterized in that: One end of the telescopic rod (4) is bent and connected with the top of the diffuse reflection shadowless light source (3), and the other end of the telescopic rod (4) is fixed on the top of the switch power supply integrated box (8).

10. The multi-lens full-range core image information automatic acquisition device according to claim 9, characterized in that: The switch power supply integrated box (8) is provided with at least a power input port (6), a power conversion module, a network port (7) and a switch (9); the power input port (6) is used to connect external power supply; the power conversion module is used to convert external power supply into low-voltage direct current; the network port (7) is composed of a plurality of switches connected in series, and is connected with a control processing terminal for communication; the switch (9) is used to control the power switch state of the whole device.

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