Automatic acquisition equipment for three-dimensional real scene of rock core

Abstract

According to the automatic acquisition equipment for the three-dimensional real scene of the rock core, the rock core is placed on the rotatable roller of the rotating seat, the camera on the camera frame of the U-shaped frame structure can cover the cylindrical surface and the cross section of the rock core, and 360-degree all-dimensional dead-corner-free shooting can be carried out by automatically rotating the rock core through the roller; the core photo overlapping degree and angle required by modeling are ensured, and then the photos are imported into computer three-dimensional live-action modeling software for core three-dimensional live-action modeling; in addition, the multiple rollers arranged in parallel enable the equipment to be capable of containing rock cores with different diameters. The automatic acquisition equipment can quickly and completely acquire all-dimensional dead-angle-free multi-view pictures of the cylindrical surface and the cross section of a real rock core at one time, so that the picture acquisition time and the subsequent rock core three-dimensional live-action modeling time are greatly shortened, and the rock core shooting and modeling efficiency and the success rate are improved; the obtained three-dimensional real scene model reflects the real texture and geometric morphology of the rock core, and the engineering rock core management level and the digital level are greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of geological exploration and relates to an automatic collection device. Background Art

[0002] In fields such as water conservancy and hydropower engineering, as well as geology and mining, cores are cylindrical rock samples extracted from holes using annular drill bits and other coring tools, based on geological survey and engineering needs. After core collection, they need to be transported to a core storage facility for storage. A large amount of physical cores has been accumulated during engineering geophysical exploration, hydrogeology, mineral exploration, and other engineering surveys. This physical storage is very inconvenient to store and transport, not only taking up a large amount of space, but also risking damage over time and due to repeated handling.

[0003] In recent years, with the rise and development of digital technologies such as 3D laser scanning, BIM modeling, and reality modeling, digital core 3D reality modeling methods based on close-range photogrammetry have provided a novel approach to core storage and management. However, due to the small diameter of physical cores, cores are difficult to secure, and obscured portions of the core cannot be used for imaging and modeling, making cross-sectional data acquisition difficult. Research has shown that current 3D reality modeling-based core acquisition equipment, while capable of capturing core columnar data, does not capture cross-sectional data. Furthermore, reality modeling requires high photo acquisition requirements, typically requiring an overlap rate of greater than 65% and an angle of less than 20° between adjacent photographs taken at the same location on the core. This makes it difficult to control the overlap and angle of core photography, making it difficult to capture photos that meet modeling requirements using traditional photography methods. This results in slow 3D reality modeling and a low success rate. Utility Model Content

[0004] In order to solve the problems described in the background technology of difficulty in collecting core cross-section data, difficulty in controlling the overlap and angle of core shooting, slow speed and low success rate of core three-dimensional real scene modeling, the utility model provides an automated collection device for core three-dimensional real scene.

[0005] The technical solution of the present invention includes a camera frame, a rotating seat, and a plurality of parallel rollers; the camera frame is a horizontally placed U-shaped frame structure, a plurality of cameras are arranged on the inner side wall of the camera frame, and a support structure is arranged at the bottom of the camera frame; the rotating seat is arranged inside the camera frame, and the end of the rotating seat is fixedly connected to the support structure; the roller is arranged on the rotating seat and is used to place and rotate the rock core. The camera on the camera frame of the U-shaped frame structure of the present invention can cover the core cylinder and cross-section. The rock core is placed on the rotatable roller, and the roller automatically rotates the rock core and performs 360-degree all-round shooting without blind spots, ensuring the overlap and angle of the rock core photos required for modeling. It can achieve that the adjacent angles of different shooting points at the same position of the rock core are less than 20°, and the overlap rate of adjacent photos is greater than 65%. The photos are then processed and uploaded to the computer 3D real scene modeling software for rock core 3D real scene modeling.

[0006] Furthermore, the camera holder has a window rubber plug installed on the outside of the camera; the inner wall of the camera holder is a light diffuser, and the inner wall of the light diffuser is equipped with a fill light. The fill light and light diffuser are installed on the device to further improve the shooting effect by adjusting the color temperature and brightness of the fill light.

[0007] Furthermore, the camera frame comprises a horizontal frame, a connecting plate, an angle frame, an extension plate, and horizontal frame support legs. Multiple cameras are mounted on the inner sidewalls of the horizontal frame and the angle frame. Each end of the horizontal frame is connected to one end of the angle frame via a connecting plate, forming a U-shaped frame structure. The bottoms of both ends of the horizontal frame are provided with horizontal frame support legs, which are fixedly connected to one end of the extension plate, while the other end of the extension plate is fixedly connected to the end of the rotating base. Support legs are mounted at the bottoms of the two exposed ends of the angle frame, and the angle frame is adjustable along the length of the horizontal frame. The cameras can be turned on and off according to the length of the core, reducing the amount of captured data and data interference. The movable angle frame allows the device to accommodate cores of varying lengths, ensuring that the core cross-section maintains a fixed distance from the cameras on the angle frame when cores of different lengths are placed, enabling accurate focus. The cameras can be turned on and off autonomously, disabling cameras on the angle frame that cannot capture the core according to the core length, thereby eliminating redundant data and reducing the amount of data.

[0008] Furthermore, an adjustment plate is disposed above the horizontal frame, with multiple screw holes extending through the adjustment plate. Screw holes corresponding to the screw holes in the adjustment plate are disposed on the top of the horizontal frame. One end of the connecting plate is inserted between the horizontal frame and the adjustment plate and connected to the horizontal frame and the adjustment plate via hand screws. A movable support foot and a fixed support foot are respectively disposed at the bottom of the two exposed ends of the angle frame. The provision of the adjustment plate and movable support foot facilitates adjustment of the distance between the left and right angle frames and the camera.

[0009] Furthermore, a switch is fixed to the bottom of the angle frame, and the side of the switch is in contact with the fixed support legs. The switch can be used to directly connect the automatic data collection device of the present invention to other devices such as a computer.

[0010] Furthermore, the exposed end of the angled frame above the fixed support legs is equipped with power input ports for the camera and light source, a network port, and a switch power input port. The horizontal frame is equipped with a camera switch. Cables are installed on the inner sides of the horizontal frame and angled frame. The automated data acquisition device of this utility model can be directly connected to a computer via a network cable through the switch and network port. The operation of the automated data acquisition device is controlled by the computer, and photos taken by the camera can also be automatically transmitted to the computer via the network cable.

[0011] Furthermore, the rotating seat includes a bottom plate and a top plate; the two ends of the bottom plate and the two ends of the top plate are fixedly connected by end support platforms, and the middle part of the bottom plate and the middle part of the top plate are fixedly connected by a middle support platform; the top of one end of the top plate is provided with an end rotating connecting seat, the top of the other end of the top plate is provided with a rotating support seat, and the top of the middle part of the top plate is provided with a middle rotating connecting seat; the rotating support seat, the middle rotating connecting seat and the end rotating connecting seat are connected to the roller.

[0012] Furthermore, the roller includes a driven roller and a driving mechanism; the driving mechanism includes a motor, a driving gear and a driven gear, the motor is arranged on the bottom plate, the power output end of the motor is connected to the driving gear, the driving gear and the driven gear are arranged in the end support platform below the rotating support seat, the driving gear and the driven gear are engaged with each other, and the driven gear is engaged with the driven roller and drives the driven roller to rotate.

[0013] Furthermore, a control board and a power supply are provided on the bottom plate of the rotating seat; a motor control port, a switch power output port, a camera and light source power output port, a power input port and a fill light brightness adjustment switch are provided on the side of the end support platform below the end rotating connecting seat.

[0014] Furthermore, the technical solution of the present invention also includes a light shield with a movable window. This shield not only reduces ambient light interference and provides a uniform, soft light effect, but also creates a single background that highlights the core, facilitating image background cutout processing during subsequent modeling and improving subsequent image processing efficiency. The movable window not only facilitates the placement of the core but can also be opened at any time to monitor the progress of the shooting within the box.

[0015] Compared with the existing technology, the present invention places the core on a rotatable roller on a rotating seat. Multiple cameras on a U-shaped camera frame can cover the core cylinder and cross-section. The roller automatically rotates the core to capture 360-degree, all-round, no-blind-angle photos, ensuring the overlap and angle of the core photos required for modeling. The photos are then imported into the computer's 3D real-scene modeling software for core 3D real-scene modeling. In addition, multiple parallel rollers enable the device to place cores of different diameters, so that the appropriate placement position can be selected according to the diameter of the core, so that the distance between the camera and the cores of different diameters remains consistent, ensuring that the camera's fixed-focus lens image does not defocus, thereby obtaining a high-definition and high-precision real-scene model. The present invention's automated acquisition equipment can quickly and completely capture all-round, no-blind-angle, multi-angle photos of the core cylinder and cross-section in one go, greatly shortening the photo acquisition time and subsequent core 3D real-scene modeling time, while also improving the efficiency and success rate of core photography and modeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an isometric view of the present invention.

[0017] Figure 2 It is a rear view of the present invention.

[0018] Figure 3 This is a schematic structural diagram of a camera frame of the present invention.

[0019] Figure 4 for Figure 1 Left side partial image.

[0020] Figure 5 for Figure 1 The right side partial image.

[0021] Figure 6 This is a schematic diagram of using the utility model to test the core.

[0022] Figure 7 Schematic diagram of the light shield of the present invention, (a) is the external structure diagram of the light shield, and (b) is the internal structure diagram of the light shield.

[0023] Explanation of reference numerals: 1- camera stand; 1.1- horizontal frame; 1.2- connecting plate; 1.3- adjustment plate; 1.4- angle frame; 1.5- movable support foot; 1.7- fixed support foot; 1.8- extension plate; 1.9- horizontal frame support foot; 1.10- thumb screw; 2- light diffuser; 3- window rubber plug; 4- camera; 5- fill light; 6- power input port for camera and light source; 7- network port; 8- power input port for switch; 9 switch; 10- control panel; 11- rotating base; 11.1- bottom plate; 11.2- end support platform; 11.3- top plate ;11.4-end rotating connector;11.5-middle support platform;11.6-middle rotating connector;11.7-rotating support seat;12-power supply;13-motor control port;14-roller;14.1-driven roller;14.2-motor;14.3-driving gear;14.4-driven gear;15-switch power output port;16-camera and light source power output port;17-power input port;18-camera switch;19-fill light brightness adjustment switch;20-cable;21-light hood;21.1-movable window;Y-core. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is 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 used to explain this application and are not intended to limit this application.

[0025] An automated acquisition device for three-dimensional core scenes, such as Figure 1 and Figure 6 As shown, the whole is composed of a camera frame 1, a rotating base 11, and multiple parallel rollers 14. The camera frame 1 is a horizontally placed U-shaped frame structure. Multiple cameras 4 are installed on the inner side wall of the camera frame 1, and a support structure is installed at the bottom of the camera frame 1. The rotating base 11 is installed inside the camera frame 1, and the end of the rotating base 11 is fixedly connected to the support structure. The rollers 14 are installed on the rotating base 11 and are used to place and rotate the core Y.

[0026] Camera 4 of camera mount 1 is equipped with a window rubber stopper 3 on the outside. Camera 4 can be turned on and off according to the length of core Y, reducing the amount of captured data and data interference. The inner wall of camera mount 1 is a light diffuser 2, and the inner wall of light diffuser 2 is equipped with a fill light 5. Fill light 5 can adjust the color temperature and brightness according to the environment to ensure the best shooting effect.

[0027] The specific structure of the camera frame 1 is as follows Figures 2 to 5 As shown, a plurality of cameras 4 are provided on the inner side walls of the horizontal frame 1.1 and the angle frame 1.4. Both ends of the horizontal frame 1.1 are connected to one end of the angle frame 1.4 through a connecting plate 1.3 to form a U-shaped frame structure. Specifically, as shown Figure 4As shown, an adjustment plate 1.2 is provided on the cross frame 1.1, and the adjustment plate 1.2 is provided with multiple screw holes running through it. The top of the cross frame 1.1 is provided with screw holes corresponding to the screw holes of the adjustment plate 1.2. One end of the connecting plate 1.3 is inserted between the cross frame 1.1 and the adjustment plate 1.2 and is connected to the cross frame 1.1 and the adjustment plate 1.2 through the hand screw 1.10. Figure 3 As shown, the bottom of the two ends of the horizontal frame 1.1 is provided with a horizontal frame support foot 1.9, the bottom of the horizontal frame support foot 1.9 is fixedly connected to one end of the extension plate 1.8, and the other end of the extension plate 1.8 is fixedly connected to the end of the rotating base 11. Figure 4 and Figure 5 As shown, the exposed end of one of the angle brackets 1.4 is provided with a movable support foot 1.5 at its bottom, while the exposed end of the other angle bracket 1.4 is provided with a fixed support foot 1.7 at its bottom. By adjusting the fixed position of the connecting plate 1.3, the cross bracket 1.1, and the adjustment plate 1.2, the angle brackets 1.4 can be adjusted and moved along the length of the cross bracket 1.1. For rock cores Y of different lengths, the distance between the cameras 4 on the left and right angle brackets 1.4 can be adjusted to ensure that the rock core Y is accurately focused.

[0028] like Figure 5 As shown, a switch 9 is fixed to the bottom of the angle frame 1.4, and the side of the switch 9 is in contact with the fixed support leg 1.7, that is, the switch 9 is installed at the bottom of the angle frame 1.4 where the fixed support leg 1.7 is located. The exposed end of the angle frame 1.4 above the fixed support leg 1.7 is provided with a camera and light source power input port 6, a network port socket 7, and a switch power input port 8. The horizontal frame 1.1 is provided with a camera switch 18. Cables 20 are installed on the inside of the horizontal frame 1.1 and the angle frame 1.4. Cables 20 include a power cord and a network cable. The power cord has two positive and negative lines and supplies power to the camera 4 and the fill light 4. The network cable is a Category 6 network cable, which is connected to the transmission network interface of the camera 4 to control the camera 4 to take pictures and receive the data captured by the camera 4.

[0029] The specific structure of the rotating seat 11 is as follows Figure 4 and Figure 5 As shown, the rotating base 11 is provided with a bottom plate 11.1 and a top plate 11.3; the two ends of the bottom plate 11.1 and the two ends of the top plate 11.3 are fixedly connected by end support platforms 11.2, and the middle part of the bottom plate 11.1 and the middle part of the top plate 11.3 are fixedly connected by a middle support platform 11.5; the top of one end of the top plate 11.3 is provided with an end rotating connecting seat 11.4, the top of the other end of the top plate 11.3 is provided with a rotating support seat 11.7, and the top of the middle part of the top plate 11.3 is provided with a middle rotating connecting seat 11.6; the rotating support seat 11.7, the middle rotating connecting seat 11.6 and the end rotating connecting seat 11.4 are connected to the roller 14; the control board 10 and the power supply 12 are provided on the bottom plate 11.1 of the rotating base 11. Figure 2As shown, a motor control port 13, a switch power output port 15, a camera and light source power output port 16, a power input port 17 and a fill light brightness adjustment switch 19 are provided on the side of the end support platform 11.2 below the end rotating connecting seat 11.4.

[0030] The specific structure of the drum 14 is as follows Figure 4 and Figure 5 As shown, the roller 14 is composed of a driven roller 14.1 and a drive mechanism; the drive mechanism is composed of a motor 14.2, a driving gear 14.3, and a driven gear 14.4. The motor 14.2 is arranged on the bottom plate, and the power output end of the motor 14.2 is connected to the driving gear 14.3. The driving gear 14.3 and the driven gear 14.4 are arranged in the end support platform 11.2 below the rotating support seat 11.7. The driving gear 14.3 and the driven gear 14.4 are meshed with each other, and the driven gear 14.4 is meshed with the driven roller 14.1 and drives the driven roller 14.1 to rotate. Multiple parallel rollers 14 allow the device to place cores Y of different diameters. Therefore, the appropriate placement position can be selected according to the diameter of the core Y, so that the distance between the lens and the cylindrical surface of the core Y of different diameters is consistent, so as to ensure that the fixed focus lens image does not defocus, thereby obtaining a high-definition and high-precision real scene model. In this embodiment, the number of rollers 14 is four, but of course the number of rollers 14 can be increased or decreased according to actual conditions.

[0031] like Figure 7 As shown, a light shield 21 can also be provided on the outside of the camera holder 1. This light shield 21 is equipped with a movable window 21.1. The movable window 21.1 can be provided on the side and top of the light shield 21 and connected to the light shield 21 via hinges, allowing the movable window 21.1 to fold along the hinges to facilitate placement of the core Y on the roller 14. The provision of the light shield 21 ensures a stable shooting environment. On the one hand, it avoids interference from ambient light and provides a uniform, soft light effect. On the other hand, it creates a single background that highlights the core body, facilitating image background cutout processing during subsequent modeling, thereby improving subsequent image processing efficiency.

[0032] Through the switch 9 and network port 7, communication is established between the transmission network interfaces of all cameras 4 and the computer's transmission network interface. Using network cable signal transmission, the images captured by the cameras 4 are automatically transmitted to the computer via the network cable. Connecting the computer via a USB cable allows the rotation time, angle, and speed of the motor 14.2 to be controlled through the computer's serial port. To ensure efficient data transmission, each camera 4 can be provided with an Ethernet port and connected to the switch 9. The switch 9 is then connected to the computer, ensuring that the computer has sufficient performance and network bandwidth to process the data generated by multiple cameras. The switch 9 uses a Gigabit Ethernet port. The computer control software workflow is as follows: a command is sent to the motor 14.2, rotating the core Y by a certain angle, causing the camera 4 to automatically capture the image. The image is transferred to a designated folder on the computer, and image preprocessing and modeling processes are performed in the background. The capture and data transmission proceed continuously without affecting the next capture of the core Y.

[0033] The camera 5 on the camera stand can cover the cylindrical surface and cross section of the core Y. The core Y is placed on the rotatable roller 14. The roller 14 automatically rotates the core at a certain angle to perform 360-degree all-round shooting without blind spots. The rotation angle is preferably 15°, so that the interval between adjacent angles of different shooting points at the same position of the core Y is less than 20°. The real scene modeling requires an overlap rate of more than 65% to ensure the overlap and angle of the core photos required for modeling. The photos are then imported into the computer 3D real scene modeling software for core 3D real scene modeling.

[0034] The device of the utility model is used to automatically collect the three-dimensional real scene of a certain core Y. Finally, the three-dimensional real scene model of the core is modeled. The cylinder and cross section of the core Y are clear, which can reflect the real texture and geometric shape of the core Y.

[0035] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. An automated acquisition device for three-dimensional core images, characterized by: It comprises a camera frame (1), a rotating seat (11) and a plurality of rollers (14) arranged in parallel; The camera frame (1) is a horizontally placed U-shaped frame structure, a plurality of cameras (4) are arranged on the inner side wall of the camera frame (1), and a supporting structure is arranged at the bottom of the camera frame (1); the rotating seat (11) is arranged inside the camera frame (1), and the end of the rotating seat (11) is fixedly connected to the supporting structure; the roller (14) is arranged on the rotating seat (11) and is used to place and rotate the core (Y).

2. The automated acquisition device for three-dimensional core scenes according to claim 1, characterized in that: A window rubber plug (3) is provided on the outer side of the camera (4) on the camera frame (1); the inner side wall of the camera frame (1) is a light-diffusing plate (2), and a fill light (5) is provided on the inner wall of the light-diffusing plate (2).

3. The automated acquisition device for three-dimensional core scenes according to claim 2, characterized in that: The camera frame (1) comprises a horizontal frame (1.1), a connecting plate (1.3), an angle frame (1.4), an extension plate (1.8), and horizontal frame support legs (1.9); A plurality of cameras (4) are provided on the inner side walls of the horizontal frame (1.1) and the angle frame (1.4); both ends of the horizontal frame (1.1) are connected to one end of the angle frame (1.4) via a connecting plate (1.3) to form a U-shaped frame structure; horizontal frame support feet (1.9) are provided at the bottoms of both ends of the horizontal frame (1.1); the bottoms of the horizontal frame support feet (1.9) are fixedly connected to one end of an extension plate (1.8); and the other end of the extension plate (1.8) is fixedly connected to the end of a rotating seat (11); Support feet are provided at the bottoms of the two exposed ends of the angle frame (1.4), and the angle frame (1.4) can be adjusted and moved along the length direction of the horizontal frame (1.1).

4. The automated acquisition device for three-dimensional core scenes according to claim 3, characterized in that: An adjustment plate (1.2) is provided on the cross frame (1.1), the adjustment plate (1.2) is provided with a plurality of screw holes passing through, a screw hole corresponding to the screw hole of the adjustment plate (1.2) is provided on the top of the cross frame (1.1), one end of the connecting plate (1.3) is inserted between the cross frame (1.1) and the adjustment plate (1.2) and is connected to the cross frame (1.1) and the adjustment plate (1.2) by means of a hand screw (1.10); The bottoms of the two exposed ends of the angle frame (1.4) are respectively provided with a movable supporting foot (1.5) and a fixed supporting foot (1.7).

5. The automated acquisition device for three-dimensional core scenes according to claim 4, characterized in that: A switch (9) is fixed to the bottom of the angled frame (1.4), and the side surfaces of the switch (9) are in contact with the fixed support legs (1.7).

6. The automated acquisition device for three-dimensional core images according to claim 5, characterized in that: The exposed end of the angle frame (1.4) above the fixed support leg (1.7) is provided with a camera and light source power input port (6), a network port seat (7), and a switch power input port (8); the horizontal frame (1.1) is provided with a camera switch (18); and cables (20) are provided on the inner sides of the horizontal frame (1.1) and the angle frame (1.4).

7. The automated acquisition device for three-dimensional core images according to any one of claims 1 to 6, characterized in that: The rotating seat (11) comprises a bottom plate (11.1) and a top plate (11.3); the two ends of the bottom plate (11.1) and the two ends of the top plate (11.3) are fixedly connected via end support platforms (11.2), and the middle part of the bottom plate (11.1) and the middle part of the top plate (11.3) are fixedly connected via a middle support platform (11.5); an end rotating connecting seat (11.4) is provided at the top of one end of the top plate (11.3), a rotating support seat (11.7) is provided at the top of the other end of the top plate (11.3), and a middle rotating connecting seat (11.6) is provided at the top of the middle part of the top plate (11.3); the rotating support seat (11.7), the middle rotating connecting seat (11.6) and the end rotating connecting seat (11.4) are connected to the roller (14).

8. The automated acquisition device for three-dimensional core images according to claim 7, characterized in that: The roller (14) comprises a driven roller (14.1) and a driving mechanism; the driving mechanism comprises a motor (14.2), a driving gear (14.3) and a driven gear (14.4); the motor (14.2) is arranged on a bottom plate; a power output end of the motor (14.2) is connected to the driving gear (14.3); the driving gear (14.3) and the driven gear (14.4) are arranged in an end support platform (11.2) below a rotating support seat (11.7); the driving gear (14.3) and the driven gear (14.4) are meshed with each other; the driven gear (14.4) is meshed with the driven roller (14.1) and drives the driven roller (14.1) to rotate.

9. The automated acquisition device for three-dimensional core images according to claim 8, characterized in that: A control panel (10) and a power supply (12) are provided on the bottom plate (11.1) of the rotating seat (11); a motor control port (13), a switch power output port (15), a camera and light source power output port (16), a power input port (17), and a fill light brightness adjustment switch (19) are provided on the side of the end support platform (11.2) below the end rotating connecting seat (11.4).

10. The automated acquisition device for three-dimensional core scenes according to claim 9, characterized in that: It also comprises a light shield (21), wherein the light shield (21) is provided with a movable window (21.1).

Images