A simple and rapid three-dimensional core data photographic acquisition device and method

Abstract

The present invention discloses a simple and rapid three-dimensional core data photographic acquisition device and method. The core data photographic acquisition device includes a camera pan-tilt, a digital camera, a telescopic carrier, an LED lighting system, a core carrier plate, a core clamping ring, and a power management module; place the core on the central clamping ring of the core tray, use the clamping ring and the space sand pendulum to make the core stand upright, stretch the telescopic carrier, install the camera pan-tilt and the digital camera on the telescopic carrier at a certain interval, turn on the fill light of the camera pan-tilt and the LED lighting system to irradiate the shooting target, turn on the digital camera, control the synchronous exposure of the digital camera, and collect digital images around the core; the present invention uses a digital image measurement technology system to collect the image of the core feature information in field drilling, establish a regional core database, focuses more on the acquisition of typical features of typical cores, is more intuitive and specific, and can truly reflect the typical features of local chipping and fractures of typical cores.

Description

Technical Field

[0001] The present invention belongs to the technical field of geological exploration, and particularly relates to a simple and rapid three-dimensional core data photography acquisition device and method. Background Art

[0002] Digital photogrammetry is a product developed by combining the basic principles of digital imaging and photogrammetry with multiple disciplines such as computer technology, digital image processing, image matching, and pattern recognition. It realizes the digital expression of the geometric and physical information of the photographed object. Based on the rapid development of digital photogrammetry technology, computer technology, and digital image processing, three-dimensional imaging technology has emerged and is widely used in the geological exploration industry, significantly improving the ability to quickly obtain surface aerial survey data (spatial information, object image texture). With the development of electronic technology, digital photogrammetry technology has begun to be applied to near-object panoramic photography, which can be used for the display of the true three-dimensional feature model of the target object. The digital photography technology is used to collect the characteristic information of the core in the field drilling, and a regional lithology database is established.

[0003] Currently, for water diversion projects with long routes, multiple regions, and large changes in geological conditions, in addition to paper records in the core box and photography mapping during drilling logging, separate photography acquisition is required for complete and typical cores, which is used as the basis for judging the lithology of the strata exposed by the drilling holes and is also the core basis for modifying the understanding in the later stage of the exposure of some special geology. Regarding the recording of the characteristic forms of typical cores, the most common method, due to practicality and convenience, is still the traditional photography technology. Considering the limited field conditions and the influence of light and shooting positions, the pictures collected by the traditional method fail to clearly show their lithology characteristics, and the two-dimensional plane pictures are not intuitive and specific enough, which needs to be improved. Summary of the Invention

[0004] The present invention provides a simple and rapid three-dimensional core data photography acquisition device and method, which introduces digital photogrammetry technology to synthesize three-dimensional images, forming a typical core three-dimensional model with high accuracy and strong visibility. It focuses more on the acquisition of typical characteristics of typical cores, is more intuitive and specific, and can truly reflect typical characteristics such as local block loss and fissure conditions of typical cores.

[0005] To solve the above problems, the technical solutions provided by the present invention are as follows:

[0006] An embodiment of the present invention provides a simple and rapid three-dimensional core data photography acquisition device, which includes a core bearing plate (6). A core rotating plate (5) is integrated on the core bearing plate (6). A lower bearing frame plate (4) is arranged above the core bearing plate (6). An upper bearing frame plate (1) is further arranged above the lower bearing frame plate (4). The core rotating plate (5) is fixed to a card slot (11) of the lower bearing frame plate (4) through a rotating buckle (10). The lower bearing frame plate (4) is fixed to a card slot (22) of the core bearing plate (6) through a rotating buckle (21). Both the core rotating plate (5) and the lower bearing frame plate (4) adopt an annular arch structure. Both the core rotating plate (5) and the lower bearing frame plate (4) can rotate around an axis through a ball bearing (23) in their sliding grooves.

[0007] The middle position between the lower bearing frame plate (4) and the upper bearing frame plate (1) is used to place a core (13). A plurality of telescopic bearing frames (3) are arranged at the peripheral positions between the lower bearing frame plate (4) and the upper bearing frame plate (1). The plurality of telescopic bearing frames (3) are arranged around the core (13). A core clamping ring (12) and a space sand cushion layer (14) are arranged at the central position of the core bearing plate (6). The core clamping ring (12) and the space sand cushion layer (14) are used to fix the bottom of the core (13).

[0008] A plurality of camera gimbals (8) are installed on the plurality of telescopic bearing frames (3) at a preset interval. A digital camera (9), a detachable camera power supply (16), a gimbal fill light (20), and a detachable gimbal power supply (19) are installed on the plurality of camera gimbals (8). A camera synchronous exposure controller power supply (18) and a digital camera synchronous exposure controller (17) are further arranged between adjacent camera gimbals (8) on the same row of telescopic bearing frames (3). A total digital camera synchronous exposure controller (17) is arranged on the double-row telescopic bearing frames (3). An LED lamp power management system (15) and an LED lamp (2) are further arranged at the bottom of the upper bearing frame plate (1).

[0009] According to an optional embodiment of the present invention, the core clamping ring (12) and the space sand cushion layer (14) are used to ensure that the irregular core stands upright on the core bearing plate (6), so that the photographed core stands upright at the shooting center position.

[0010] According to an optional embodiment of the present invention, the core clamping ring (12) matches the size of the core (13), and the core clamping ring (12) is installed on the card slot of the core bearing plate (6).

[0011] According to an optional embodiment of the present invention, a plurality of the telescopic carriers (3) are provided with mounting holes (7) at a preset interval, and the mounting handle of the camera platform (8) is tightened and fixed in the mounting hole (7) to complete the installation of the camera platform (8).

[0012] According to an optional embodiment of the present invention, the camera synchronous exposure controller power supply (18) is electrically connected to the shutter cable of the digital camera (9) and the camera synchronous exposure controller (17).

[0013] According to an optional embodiment of the present invention, the number of the camera platforms (8) is greater than or equal to the number of the digital cameras (9), and the number of the digital cameras (9) is 5 to 10.

[0014] The embodiment of the present invention further provides a simple and fast three-dimensional core data photography acquisition method, which is implemented by a simple and fast three-dimensional core data photography acquisition device as in the above embodiment, wherein the core data photography acquisition method comprises:

[0015] Step S1, install the core data photography acquisition device, reasonably arrange the core data photography acquisition device, collect multiple cores of the same size, and arrange the shooting points according to the longest core in the group, ensuring the overlap λ of the digital camera shooting the collected digital images of the core in the lateral and vertical directions, λ≥2 / 3 to meet the three-dimensional complete imaging requirements of most image data; wherein, in the horizontal direction, 5 wide-angle lenses are arranged around the core, and a wide-angle lens with a lens viewing angle parameter FOV value>96° is selected; the number of rows i and the arrangement height H(i) of the digital camera shooting points in the vertical direction are calculated according to the following method:

[0016] like Then i=1, like but

[0017] Wherein: b is the length of the photosensitive element (mm); s is the horizontal distance from the lens to the photographed core (cm); s=l-0.5d; l is the horizontal distance from the lens to the center of the support frame, and l=42cm is the fixed size of the device; d is the diameter of the target core (mm); f is the focal length of the lens (mm); λ is the photo overlap; X is the longest core length of the photographed group (cm); when X is lower than the critical value in the formula, the photography only needs to ensure the lateral overlap, and a row of wide-angle lens cameras can be arranged vertically; when i>2, 2 rows of cameras are arranged uniformly, and the telescopic rod of the telescopic support frame is extended upward to complete the shooting of more than 2 layers of angles. Generally speaking, arranging one row at each of the two mounting holes (7) can meet all core shooting requirements. If there are other requirements, they can be achieved by adjusting the telescopic rod upward or downward;

[0018] Step S2: Start the core data photography acquisition device, complete the self-check of the device, and ensure that the +0 scale of the rotating disk is consistent with the +0 scale of the bearing lower disk;

[0019] Step S3: Set the digital camera to the autofocus function, aim the lens at the core to be photographed, and operate the camera's synchronous exposure controller to capture the digital image of the core;

[0020] Step S4: Check the image acquisition situation, collect according to the requirement of lateral overlap degree, rotate to increase the number of acquisitions. Open the card slot of the rotating disk, rotate the core rotating disk to change the shooting position, and encrypt the acquisition. The distance between each annular card slot is 10°; rotate once every 20°, and increase the rotating shooting by 2 times when the lateral overlap degree λ≥2 / 3, and increase the rotating shooting by 3 times when the lateral overlap degree λ≥8 / 10; rotate once every 10°, and increase the rotating shooting by 6 times when the lateral overlap degree λ≥9 / 10, and select the shooting method according to the requirements. If the core is loose and chipped or the core volume is too long and large and it is not suitable to be disturbed, the card slot of the bearing lower disk can be opened, and the bearing frame lower disk can be rotated and moved to change the shooting position, and the rotating shooting method is as above; if the core to be photographed is too long and the number of rows i of the camera layout > 2, after completing steps S3 - S4, for each additional row beyond 2 rows, extend the telescopic rod of the bearing frame upward by 15 - 20 cm. Each section of the telescopic rod is 5 cm long, and the distance between the mounting holes on the rod is 5 cm, that is, the telescopic rod extends upward by 3 - 4 sections, and repeat S3 - S4 for rotating acquisition. This device is applicable to conventional cores with a single length of 10 cm - 100 cm, and the number of rows i of the camera layout max = 4, and the telescopic rod can extend upward by at most 20 cm, which can meet the core shooting within 100 cm. For each long and large core, the telescopic rod only needs to extend upward once at most to increase the shooting;

[0021] Step S5: If the shooting situation is ideal, lift the bearing frame lower disk upward, replace the target core. If continuing to shoot cores of the same size within the group, repeat S3 - S4; if shooting cores of a different group, repeat steps S1 - S4 to carry out the next group of shooting work.

[0022] According to an optional embodiment of the present invention, in step S1, the core rotating disk or the bearing frame lower disk can be rotated bidirectionally for acquisition according to the requirement of lateral overlap degree. When the actual layout number of rows i of the camera ≤ 2, the shooting rows can be added or the vertical shooting height can be changed by telescoping the telescopic rod according to the specified height.

[0023] The present invention has prominent beneficial effects compared with the prior art, which are briefly described as follows:

[0024] (1) During the use of the core data photography acquisition device in the present invention, the space limitation is small. It belongs to a portable, telescopic and detachable device, which can be used for field photography acquisition in a timely manner. All important components adopt an independent power system, and the damage of a single component does not affect the use of other components.

[0025] (2) The core data photography acquisition device in the present invention adopts a core clamping ring and a space sand cushion layer, which ensures that the irregular core stands upright on the core bearing plate, makes the photographed core stand upright at the shooting center position, and guarantees the photography imaging effect.

[0026] (3) The core data photography acquisition device in the present invention adopts a two-way rotation of the core bearing plate and the photography equipment bearing frame, and a flexible telescopic rod for shooting, which is practical and simple, and can flexibly handle the lateral and vertical overlaps of image acquisition.

[0027] (4) The shooting device has strong operability, the method steps are very simple, the influence of human factors is extremely small, the shooting distance of the digital camera can be flexibly adjusted, the overlapping rate of the exposure images of adjacent cameras can be simply and effectively controlled, the requirement of adjusting the image overlap degree for different software and precision requirements in the later stage can be met, the difficulty of later data processing can be reduced, and the quality stability of the results is high. By collecting images through photography to form a three-dimensional model, it is real and specific, can truly reflect typical features such as the depth of local core block loss and the width of crack development, and can avoid the visual misperception caused by two-dimensional images, such as Figure 13 。

[0028] (5) The present invention has obvious efficiency advantages in collecting multi-group core three-dimensional data, can ensure simple, efficient and complete data collection, and has obvious quality guarantee in a large amount of data collection work. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figures 1 to 6 It is a schematic structural diagram of a simple and rapid three-dimensional core data photography acquisition device provided by an embodiment of the present application.

[0031] Figures 7 to 13 It is a schematic installation process diagram of a simple and rapid three-dimensional core data photography acquisition device provided by an embodiment of the present application.

[0032] Figure 14 It is an example diagram of a three-dimensional model formed by a simple and rapid three-dimensional core data photography acquisition device and method provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0034] Figures 1 to 6 It is a schematic structural diagram of a simple and rapid three-dimensional core data photography acquisition device provided by an embodiment of the present invention. Figure 1 It is a top view of the upper disk 1 of the carrier frame. Figure 2 It is a top view of the core carrier disk 6. Figure 3 It is a top view of the lower disk 4 of the carrier frame. Figure 4 It is a front view of the main frame structure of the core data photography acquisition device. Figure 5 It is a front view of the core carrier disk 6. Figure 6 It is a schematic diagram of other detachable small components for core photography.

[0035] As Figures 1 to 13 shown, a simple and rapid three-dimensional core data photography acquisition device includes a core carrier disk 6, on which a core rotating disk 5 is integrated. Above the core carrier disk 6, a lower disk 4 of the carrier frame is provided, and above the lower disk 4 of the carrier frame, an upper disk 1 of the carrier frame is further provided. The core rotating disk 5 is fixed to the card slot 11 of the lower disk 4 of the carrier frame through a rotating buckle 10, and the lower disk 4 of the carrier frame is fixed to the card slot 22 of the core carrier disk 6 through a rotating buckle 21. Both the core rotating disk 5 and the lower disk 4 of the carrier frame adopt an annular arch structure; both the core rotating disk 5 and the lower disk 4 of the carrier frame can rotate around the axis through a ball bearing 23 in its chute, referring to Figure 2 and Figure 3 .

[0036] The middle position between the lower disk 4 of the carrier frame and the upper disk 1 of the carrier frame is used to place the core 13. A plurality of telescopic carrier frames 3 are arranged around the core 13 at the peripheral position between the lower disk 4 of the carrier frame and the upper disk 1 of the carrier frame; a core clamping ring 12 and a space sand cushion layer 14 are arranged at the central position of the core carrier disk 6, and the core clamping ring 12 and the space sand cushion layer 14 are used to fix the bottom of the core 13; in this embodiment, the core clamping ring 12 is selected according to the size of the core 13, the selected core clamping ring 12 is installed on a specific card slot of the core carrier disk 6, the core 13 is placed in the core clamping ring 12, and the space sand cushion layer 14 is used to play the role of an irregular cushion layer, so that the core 13 is in a vertical state under the action of the core clamping ring 12 and the space sand cushion layer 14. Also, in this embodiment, the telescopic carrier frame 3 is stretched, the carrier frame is unfolded, and according to the position of the core carrier disk 6 reserved at the bottom of the carrier frame, it is fixed at this position to accurately install the position of the carrier frame, referring to Figure 4 andFigure 5 and Figure 7 。

[0037] A plurality of telescopic carriers 3 are provided with a plurality of camera pan-tilts 8 at preset intervals. In this embodiment, a plurality of telescopic carriers 3 are provided with mounting holes 7 at preset intervals. The mounting handle of the camera pan-tilt 8 is tightened and fixed in the mounting hole 7 to complete the installation of the camera pan-tilt 8.

[0038] A plurality of camera pan-tilts 8 are installed with digital cameras 9, detachable camera power supplies 16, pan-tilt supplementary lights 20 and detachable pan-tilt power supplies 19. In this embodiment, the number of digital cameras 9 is 5 to 10. The pan-tilt 8 is preferably a three-axis pan-tilt with adjustable pitch angle. The detachable camera power supply 16 is preferably installed on the digital camera 9.

[0039] Between adjacent camera pan-tilts 8 on the same row of telescopic carriers 3, there are also provided a camera synchronous exposure controller power supply 18 and a digital camera synchronous exposure controller 17. On the double-row telescopic carriers 3, there is a total digital camera synchronous exposure controller 17. The camera synchronous exposure controller power supply 18 is electrically connected to the shutter wire of the digital camera 9 and the camera synchronous exposure controller 17.

[0040] At the bottom of the upper disk 1 of the carrier, there are also provided an LED lamp power management system 15 and an LED lamp 2. The LED lamp power management system 15 controls the turning off and on of the LED lamp 2. Refer to Figure 1 。In this embodiment, the LED lamp power management system 15 is integrated into the telescopic carrier 3. For the convenience of disassembly, the digital camera 9, the digital camera synchronous exposure controller 17, and the camera pan-tilt 8 adopt independent power management.

[0041] Figures 7 to 13 This is a schematic diagram of the installation process of a simple and fast three-dimensional core data photography acquisition device provided by an embodiment of the present application. As Figures 7 to 13 shown, the installation method of a simple and fast three-dimensional core data photography acquisition device is as follows:

[0042] As Figure 7 shown, install the core carrier disk 6. Select the core clamping ring 12 according to the size of the core 13. Install the selected core clamping ring 12 into a specific card slot of the core carrier disk 6. Place the core 13 in the core clamping ring 12. Use the space sand cushion layer 14 in the core carrier disk 6 to play the role of an irregular cushion layer, so that the core 13 is in a vertical state under the action of the space sand cushion layer and the space sand cushion layer 14.

[0043] As Figure 8As shown, stretch the telescopic bearing frame 3, unfold the telescopic bearing frame 3, and cover the core bearing plate 6 according to the position of the core bearing plate 6 reserved at the bottom of the lower plate 4 of the bearing frame. Rotate the core rotating disk 5 to the designated position, fix the rotating buckle 10 thereon to the card slot 11 of the lower plate 4 of the bearing frame, and fix the rotating buckle 21 to the card slot 22 of the lower plate 4 of the bearing frame.

[0044] As Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13 As shown, arrange the shooting positions, install the camera pan-tilt power supply 19 to the camera pan-tilt 8, align the installation handle with the installation hole 7 of the telescopic bearing frame 3, tighten the fixing screw, and complete the installation of the pan-tilt 8. Install the detachable camera power supply 16 to the digital camera 9, and install the digital camera 9 into the chamber of the camera pan-tilt 8 and fix it. Install the camera synchronous exposure controller power supply 18, and connect the camera shutter cable to the digital camera synchronous exposure controller 17. Turn on the digital camera 9, the camera exposure synchronization controller 17, the camera pan-tilt 8, and the power management system switch of the bearing frame, and turn on the camera pan-tilt fill light 20.

[0045] The embodiment of the present invention also provides a simple and fast three-dimensional core data photography acquisition method. The core data photography acquisition method is realized by a simple and fast three-dimensional core data photography acquisition device in the above embodiment. The core data photography acquisition device includes 5-10 full-frame wide-angle digital cameras, 5-10 three-axis camera pan-tilts with adjustable pitch angles, 1 bearing frame, 1 core tray, multiple core clamping rings, a space sand cushion layer, an LED lighting system, a camera synchronous exposure controller, and a power management system. Among them, the LED lighting system is integrated into the bearing frame, and the digital camera, the camera synchronous exposure controller, and the three-axis camera pan-tilt all use independent power supplies. Among them, the core data photography acquisition method includes:

[0046] Step S1, install the core data photography acquisition device, reasonably arrange the core data photography acquisition device, collect multiple core samples of the same size, and arrange the shooting points according to the longest core in the group. Ensure the overlap degree λ of the digital images of the core captured by the digital cameras in the lateral and vertical directions, and λ≥2 / 3 meets the requirements for three-dimensional complete imaging of most image data. Among them, in the horizontal direction, 5 wide-angle lenses are arranged around the core, and wide-angle lenses with a selected lens viewing angle parameter FOV value>96° are selected. In the vertical direction, the number of rows i and the layout height H(i) of the digital camera shooting points follow the following calculation method:

[0047] If then i = 1, If then

[0048] Wherein: b-length of photosensitive element (mm); s-horizontal distance from lens to photographed core (cm); s=l-0.5d; l is horizontal distance from lens to center of carrier, l=42cm is fixed size of device; d is diameter of target core (mm); f-focal length of lens (mm); λ-photo overlap; X-length of longest core of photographing group (cm); when X is lower than critical value in the formula, photography only needs to ensure lateral overlap, and a row of wide-angle lens cameras can be arranged vertically; when i>2, 2 rows of cameras are arranged uniformly, and the telescopic rod of telescopic carrier is extended upward to complete the shooting of more than 2 layers. Generally speaking, arranging one row at each of 2 mounting holes 7 can meet all core shooting requirements. If there are other requirements, they can be achieved by adjusting the telescopic rod upward or downward;

[0049] Step S2, start the core data photography and acquisition device, complete the self-check of the device, and ensure that the +0 scale position of the rotating disk is consistent with the +0 scale position of the bearing lower plate;

[0050] Step S3, the digital camera is set to an auto-focus function, the lens is aimed at the core, and the camera synchronous exposure controller is operated to capture the digital image of the core;

[0051] Step S4, check the image acquisition situation, collect according to the lateral overlap requirement, rotate to increase the number of acquisitions, open the rotating disk slot, rotate the core rotating disk, change the shooting position, and encrypt the acquisition. The interval between each ring slot is 10°; rotate once every 20°, increase the rotation and shooting by 2 times, the lateral overlap λ≥2 / 3, increase the rotation and shooting by 3 times, the lateral overlap λ≥8 / 10; rotate once every 10°, increase the rotation and shooting by 6 times, the lateral overlap λ≥9 / 10, and select the shooting method according to the requirements; if the core is loose or the core volume is too long and large, it is not suitable to disturb, you can open the slot of the lower bearing plate, rotate and move the lower bearing plate, change the shooting position, and rotate the shooting method as above; if the core to be shot is too long, the number of rows of cameras i>2, after completing steps S3-S4, add 1 row for every row exceeding 2 rows, stretch the telescopic rod of the telescopic bearing frame upward by 15-20cm, each section of the telescopic rod is 5cm long, and the spacing between the mounting holes on the rod is 5cm, that is, the telescopic rod extends upward by 3-4 sections, repeat S3-S4 rotation collection, this equipment is suitable for conventional cores, single length 10cm-100cm, camera laying row number i max =4, the telescopic rod can be extended upward by up to 20cm at most, which can meet the needs of shooting cores within 100cm. For each long and large core, the telescopic rod only needs to be extended upward once to increase the shooting;

[0052] Step S5, if the shooting condition is ideal, lift the lower plate of the support frame upwards, replace the target core, and if the same size cores in the group are continued to be shot, repeat S3-S4; if the group of cores is changed to be shot, repeat steps S1-S4 to proceed to the next group of shooting.

[0053] Preferably, in step S1, the core rotary disk or the lower disk of the carrier can be rotated according to the requirement of side overlap for two-way acquisition. The actual number of arranged camera rows i ≤ 2. The number of shooting rows can be increased or the vertical shooting height can be changed by telescoping the telescopic rod at a specified height.

[0054] The method for installing the core data photography acquisition device in step S1 of this embodiment includes: Step S11, install the core tray. Select the core clamping ring according to the core size, install the selected clamping ring into the specific card slot of the core tray, place the core in the core clamping ring, and use the space sand in the tray to play the role of an irregular cushion layer, so that the core is in a vertical state under the action of the clamping ring and the space sand cushion layer. Step S12, stretch the telescopic rod of the carrier and unfold the carrier; according to the position of the core tray reserved at the bottom of the carrier, cover the core tray, accurately install the position of the carrier, turn the core rotary disk to the specified position, and fix the rotary buckle to the card slot of the lower disk of the carrier; Step S13, install the camera pan-tilt power supply on the camera pan-tilt, align the installation handle with the installation hole of the carrier, and tighten the fixing screw to complete the installation of the camera pan-tilt. Step S14, install the digital camera power supply on the digital camera, and install the digital camera into the camera pan-tilt bin and fix it; install the camera synchronous exposure controller power supply, connect the digital camera shutter line to the camera synchronous exposure controller; turn on the switches of the digital camera, camera synchronous exposure controller, camera pan-tilt, and carrier power management system, and turn on the fill light of the camera pan-tilt.

[0055] Figure 14 This is an example diagram of a three-dimensional solid model formed by a simple and fast three-dimensional core data photography acquisition device and method provided by an embodiment of the present application. The core data photography acquisition device of the present invention has strong operability, very simple method steps, extremely little influence of human factors, can flexibly adjust the shooting distance of the digital camera, simply and effectively control the overlapping rate of adjacent camera exposure images, can meet the requirements of adjusting the image overlapping degree for different software and accuracy requirements in the later stage, reduce the difficulty of later data processing, and has high stability of the result quality. The three-dimensional solid model is formed by collecting images through the photography method, which is real and specific, can truly reflect typical features such as the depth of local block loss and the width of crack development of the core, and can avoid the visual misperception caused by two-dimensional images.

[0056] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be covered within the protection scope of the present invention; those of ordinary skill in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention is subject to the scope defined by the claims.

Claims

1. A simple and fast three-dimensional core data photographic acquisition device, characterized in that, It includes a core bearing plate (6), on which a core rotating plate (5) is integrated. Above the core bearing plate (6), a lower bearing frame plate (4) is provided. Above the lower bearing frame plate (4), an upper bearing frame plate (1) is further provided. The core rotating plate (5) is fixed to the card slot (11) of the lower bearing frame plate (4) through a rotating buckle (10). The lower bearing frame plate (4) is fixed to the card slot (22) of the core bearing plate (6) through a rotating buckle (21). Both the core rotating plate (5) and the lower bearing frame plate (4) adopt an annular arch structure. Both the core rotating plate (5) and the lower bearing frame plate (4) can rotate around the axis through a ball bearing (23) in a chute. In the middle position between the lower bearing frame plate (4) and the upper bearing frame plate (1), a core (13) is placed. Around the core (13), a plurality of telescopic bearing frames (3) are arranged at the peripheral positions between the lower bearing frame plate (4) and the upper bearing frame plate (1). At the central position of the core bearing plate (6), a core clamping ring (12) and a space sand cushion layer (14) are provided. The core clamping ring (12) and the space sand cushion layer (14) are used to fix the bottom of the core (13). On a plurality of the telescopic bearing frames (3), a plurality of camera pan-tilt heads (8) are installed at a preset spacing. On the plurality of camera pan-tilt heads (8), a digital camera (9), a detachable camera power supply (16), a pan-tilt head fill light (20), and a detachable pan-tilt head power supply (19) are installed. Between adjacent camera pan-tilt heads (8) on the same row of the telescopic bearing frames (3), a camera synchronous exposure controller power supply (18) and a digital camera synchronous exposure controller (17) are further provided. On the double-row telescopic bearing frames (3), a total digital camera synchronous exposure controller (17) is provided. At the bottom of the upper bearing frame plate (1), an LED lamp power management system (15) and an LED lamp (2) are further provided.

2. A simple and rapid three-dimensional core data photographic acquisition device according to claim 1, wherein The core clamping ring (12) and the space sand cushion layer (14) are used to ensure that the irregular core stands upright on the core bearing plate (6), so that the core to be photographed stands upright at the shooting center position.

3. A simple and rapid three-dimensional core data photographic acquisition device according to claim 1, characterized in that, The core clamping ring (12) matches the size of the core (13), and the core clamping ring (12) is installed in the card slot of the core bearing plate (6).

4. A simple and rapid three-dimensional core data photographic acquisition device according to claim 1, characterized in that, On a plurality of the telescopic bearing frames (3), mounting holes (7) are provided at a preset spacing. The mounting handle of the camera pan-tilt head (8) is tightened in the mounting hole (7) to complete the installation of the camera pan-tilt head (8).

5. A simple and rapid three-dimensional core data photography acquisition device according to claim 1, characterized in that, The camera synchronous exposure controller power supply (18) is electrically connected to the shutter wire of the digital camera (9) and the camera synchronous exposure controller (17).

6. A simple and rapid three-dimensional core data photography acquisition device according to claim 1, characterized in that The number of the camera pan-tilt heads (8) is greater than or equal to the number of the digital cameras (9), and the number of the digital cameras (9) is 5 - 10.

7. A simple and rapid three-dimensional core data photography acquisition method, which is realized by a simple and rapid three-dimensional core data photography acquisition device as described in any one of claims 1 to 6, characterized in that, The core data photography and acquisition method includes: Step S1: Install the core data photography acquisition device, and reasonably arrange the core data photography acquisition device. For the acquisition of multiple cores of the same size, just arrange the shooting points according to the longest core in the group, and ensure the coincidence degree λ of the digital images of the cores collected by the digital camera in the lateral and vertical directions. λ≥2 / 3 meets the requirements for the three-dimensional complete imaging of most image data. Among them, in the horizontal direction, 5 wide-angle lenses are arranged around the core, and wide-angle lenses with a selected lens viewing angle parameter FOV value > 96° are selected. For the arrangement rows i and the arrangement height H(i) of the digital camera shooting points in the vertical direction, the following calculation method is followed: If then i = 1, If then In the formula: b - the length of the photosensitive element, in mm; s - the horizontal distance from the lens to the core being photographed, in cm; s = l - 0.5d; l is the horizontal distance from the lens to the center of the carrier, l = 42 cm is the fixed size of the device; d is the diameter of the target core, in mm; f - the focal length of the lens, in mm; λ - the photo coincidence degree; X - the length of the longest core in the shooting group, in cm. When X is lower than the critical value in the formula, only ensure the lateral coincidence degree during photography, and arrange a row of wide-angle lens cameras vertically. When i > 2, always arrange 2 rows of cameras, and extend the telescopic rod of the carrier upward to complete the shooting at angles above 2 layers. Generally speaking, arrange a row at each of the 2 mounting holes (7) to meet the shooting requirements of all cores. If there are other requirements, adjust the telescopic rod up or down to achieve them; Step S2: Start the core data photography acquisition device, complete the self-inspection of the device, and ensure that the +0 scale of the rotating disk is consistent with the +0 scale of the lower carrier disk; Step S3: Set the digital camera to the autofocus function, aim the lens at the core to be photographed, and operate the camera synchronous exposure controller to shoot and collect the digital images of the core; Step S4: Check the image acquisition situation. Acquire images according to the requirement of lateral overlap. Rotate to increase the number of acquisitions. Open the rotating disk card slot, rotate the core rotating disk, change the shooting position, and perform encrypted acquisition. The distance between each annular card slot is 10°; rotate once every 20°, and increase the rotating shooting by 2 times when the lateral overlap λ≥2 / 3, and increase the rotating shooting by 3 times when the lateral overlap λ≥8 / 10; rotate once every 10°, and increase the rotating shooting by 6 times when the lateral overlap λ≥9 / 10. Select the shooting method according to the requirements. If the core is loose and falling off, or the core is too long and large in volume and should not be disturbed, the bearing lower disk card slot can be opened, the bearing frame lower disk can be rotated and moved to change the shooting position, and the rotating shooting method is the same as above; if the core to be photographed is too long and the number of rows i of the camera layout > 2, after completing steps S3 - S4, for each additional row over 2 rows, the telescopic rod of the bearing frame is stretched upward by 15 - 20 cm. Each section of the telescopic rod is 5 cm long, and the distance between the mounting holes on the rod is 5 cm, that is, the telescopic rod extends upward by 3 - 4 sections. Repeat S3 - S4 for rotating acquisition. This device is applicable to conventional cores with a single length of 10 cm - 100 cm and the number of rows i of the camera layout max = 4. The telescopic rod can extend upward by at most 20 cm to meet the shooting of cores within 100 cm. For each long and large core, the telescopic rod only needs to extend upward once at most to increase the shooting; Step S5: If the shooting situation is ideal, lift the lower carrier disk upward, replace the target core. If continuing to shoot cores of the same size within the group, repeat S3 - S4; if shooting cores of a different group, repeat steps S1 - S4 to carry out the shooting work for the next group.

8. A simple and rapid three-dimensional core data photography acquisition method according to claim 7, characterized in that In step S1, according to the requirements of the lateral coincidence degree, rotate the core rotating disk or the lower carrier disk for two-way rotation to collect. The actual number of arranged camera rows i ≤ 2, and the telescopic rod is used to extend and contract at the specified height to add shooting rows or change the vertical shooting height.

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