Image acquisition device and method for drilling core sample

Abstract

The invention provides an image acquisition device and method for a drilled core sample. The image acquisition device comprises a positioning table, a plurality of groups of centering seats and an appearance data acquisition assembly, the positioning table is provided with a plurality of guiding pieces arranged at intervals in the front-back direction, and the multiple sets of centering bases are arranged on the multiple guiding pieces in a one-to-one correspondence mode. Each group of centering seats comprises two centering seats which are arranged left and right, the two centering seats are connected through a distance adjusting structure, and each centering seat is provided with a limiting structure and a rotation driving component. The appearance data acquisition assembly is slidably arranged on the positioning table and is connected with a linear driving component. In actual use, image acquisition of different core samples is realized through movement of the appearance data acquisition assembly; and meanwhile, the core sample is driven to rotate by rotating the driving component, so that the full coverage of the core sample appearance data acquisition range can be realized. According to the image acquisition device and method for the drilled core sample provided by the invention, the accuracy of core sample data acquisition is ensured, so that the reliability of subsequent quality evaluation is ensured.

Description

Technical Field

[0001] This application belongs to the field of core sample data acquisition technology, specifically relating to an image acquisition device and method for core drilling samples. Background Technology

[0002] In the field of construction engineering quality testing, core drilling is a physical quality testing technique. Specifically, it refers to using a drilling rig to extract cylindrical specimens from components such as concrete structures, rocks, or asphalt pavements. A "core sample" (hereinafter referred to as a "core sample") is a sample that has undergone processes such as cutting and grinding, and is used for subsequent analysis of its physical and mechanical properties, including compressive strength, integrity, and internal structure. Accurate data acquisition from the core sample, especially imaging and quantitative analysis of apparent defects such as cracks, holes, and delamination on its cylindrical surface, is a crucial step in assessing the health of a structure and estimating its strength and durability.

[0003] In existing technologies, image data acquisition of the core sample surface mainly relies on digital cameras. Specifically, the operator places the core sample horizontally on a simple support and manually controls its rotation; after each rotation at a certain angle (such as 30 degrees, 45 degrees, 60 degrees, or 90 degrees), a photograph is taken. Through multiple rotations and photographs, a set of multiple photographs covering the entire circumference of the core sample is finally obtained.

[0004] The inventors discovered that the aforementioned data acquisition method based on manual core sample rotation has significant shortcomings. First, the entire process is highly dependent on manual operation, resulting in low efficiency and difficulty in meeting the testing needs of large-scale core samples. Second, manually controlling the rotation angle is difficult to guarantee precision and consistency, easily leading to uneven overlapping areas or missed areas in the captured images. Furthermore, the core sample may shift axially during rotation, making it impossible to accurately align and stitch the final acquired image sequence, causing data distortion, affecting the accuracy of core sample data acquisition, and impacting subsequent quality evaluation. Summary of the Invention

[0005] This application provides an image acquisition device and method for core samples, which aims to replace manual operation, ensure the accuracy of core sample data acquisition, and guarantee the reliability of subsequent quality evaluation.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: An image acquisition device for core samples is provided, comprising: A positioning platform is used to be fixedly set on a horizontal surface and has multiple guide members spaced apart in the front-back direction; Multiple sets of centering seats are correspondingly arranged on multiple guide members; each set of centering seats includes two centering seats arranged side by side in the left-right direction, and the two centering seats are connected by an adjusting structure; each centering seat has a limiting structure for contacting the end of the core sample, and also has a rotation driving member for driving the core sample to rotate; and An appearance data acquisition component is slidably mounted on the positioning platform in the front-to-back direction, and is connected to a linear drive component for driving the appearance data acquisition component toward any of the core samples fixed by the centering seats, so as to acquire and record the appearance data of the outer peripheral surface of the core sample.

[0007] In one possible implementation, the limiting structure includes: An alignment shell, disposed on the upper side of the alignment seats, has a cavity open towards the middle region of the two alignment seats; the cavity is for inserting the end of the core sample, and a recessed groove with its ends connected is formed on the inner circumferential surface of the cavity; and An elastic ring, fitted into the recessed groove, is used to be sleeved on the outer periphery of the core sample and undergo elastic deformation to make an interference fit with the outer peripheral surface of the core sample; and the elastic ring has a degree of freedom of rotation relative to the positioning shell, and the rotation drive member is connected to the elastic ring in a transmission manner. The lower end of the alignment shell has a downwardly extending protrusion, and the upper side of the centering seat has a slot suitable for inserting the protrusion. Furthermore, the protrusion is made of an elastic material, and when the protrusion is inserted into the slot, the protrusion and the inner wall of the slot are in an interference fit.

[0008] In one possible implementation, the upper end face of the alignment shell has a reserved hole communicating with the sinking groove, and the rotation drive component includes: The alignment frame is slidably mounted on the guide member, and its sliding direction is parallel to the sliding direction of the centering seat; and A wheel housing is disposed on the lower side of the alignment frame and is connected to the alignment frame through a pre-tightening structure; a drive wheel is rotatably disposed on the wheel housing, the axis of the drive wheel is parallel to the central axis of the cavity, and the drive wheel is driven by a first rotary motor for driving its rotation. The pre-tightening structure enables the wheel housing to move vertically relative to the alignment frame, so that the drive wheel passes through the pre-drilled hole and abuts against the outer circumferential surface of the elastic ring. When the drive wheel abuts against the elastic ring, the first rotating motor drives the drive wheel to rotate, and the elastic ring drives the core sample to rotate synchronously.

[0009] In one possible implementation, the preload structure includes: A fixing nut is fixedly mounted on the alignment frame, and its axial direction is parallel to the vertical direction; and The hand-tightening bolt is connected to the fixing nut, and its lower end is rotatably connected to the top surface of the wheel housing in the vertical direction.

[0010] In one possible implementation, the adjustment structure includes: Two first transmission nuts, coaxially arranged, are respectively fixedly mounted on the two centering seats; and A double-ended screw is rotatably mounted on the guide member, and has two threaded portions with opposite thread directions. The two threaded portions are respectively threadedly connected to the two first transmission nuts, so that when the double-ended screw rotates, the two first transmission nuts respectively drive the two centering seats to move towards each other or away from each other. The double-headed screw drive is connected to a second rotary motor for driving its rotation.

[0011] In one possible implementation, the upper side of the guide member is provided with a receiving groove, and the centering seat is slidably disposed in the receiving groove; The bottom of the receiving groove is provided with two strip holes corresponding to the two centering seats respectively. Each centering seat has a protrusion that passes through the corresponding strip hole and extends out, and the first transmission nut is fixedly mounted on the protrusion. Furthermore, dustproof belts are connected to adjacent sides of both centering seats; the dustproof belts are made of elastic material and their ends are connected to the bottom of the receiving groove to restrict dust particles from passing through the strip holes.

[0012] In one possible implementation, the bottom of the receiving tank is further provided with a dust removal port, which is located between the two dustproof strips, and an upper connecting pipe extending to the lower side of the guide is inserted into the dust removal port. The image acquisition device for core samples also includes: A vacuum generating assembly is used to create a negative pressure environment and is connected to multiple lower connecting pipes, each of which is connected to the upper connecting pipe so that the suction force generated by the negative pressure environment acts on the dust particles in the receiving tank.

[0013] In one possible implementation, the positioning platform has a plurality of mounting holes corresponding one-to-one with the plurality of guide members, and each guide member is inserted into the corresponding mounting hole; Each of the mounting holes has a groove on its inner wall that extends through the upper side of the positioning platform, and the guide has a boss adapted to be fitted into the groove to restrict the guide from moving downward relative to the positioning platform.

[0014] In one possible implementation, the appearance data acquisition component includes: A translational frame is slidably mounted on the upper side of the positioning platform in the front-to-back direction; and The camera assembly is mounted on the translation frame and has the degree of freedom to move relative to the translation frame in the vertical direction, and is connected to a linear cylinder for transmission. Furthermore, the linear drive component includes: The second transmission nut is fixedly mounted on the translation frame, and its axial direction is parallel to the front-rear direction; and The drive screw is rotatably mounted on the positioning platform and threadedly connected to the second transmission nut; The drive screw is connected to a third rotary motor for driving its rotation.

[0015] The core improvement in this embodiment lies in the introduction of the design concepts of "multi-station" and "integrated drive". Specifically, multiple guide members are spaced apart along the front-rear direction on the positioning platform, and each guide member is equipped with a set of independent centering seats; each set of centering seats includes two centering seats connected by an adjustment structure, and integrates a limiting structure and a rotation drive component. The appearance data acquisition component achieves sliding switching between different stations through a linear drive component.

[0016] In the aforementioned structure, multiple alignment seats create a "pre-processing and inspection station array" capable of simultaneously supporting multiple core samples. Operators can install, align, and fix all core samples to be inspected offline onto their respective alignment seats, decoupling this process from the image acquisition process in both time and space. During actual acquisition, the sliding appearance data acquisition component, driven by a linear drive mechanism, moves sequentially and precisely above each core sample to perform image acquisition. This design revolutionizes the traditional serial operation mode of "single core sample: clamping-adjustment-acquisition-disassembly" into a semi-parallel operation mode combining "parallel clamping of multiple core samples" and "serial inspection of appearance data acquisition components." The image acquisition time of a single station is fully utilized, eliminating the significant waiting time for core sample assembly, disassembly, and alignment adjustments found in the traditional mode. This increases the overall throughput several times over, making it particularly suitable for testing institutions facing large-volume, periodic core sample testing tasks, effectively alleviating testing backlog pressure.

[0017] Furthermore, each centering unit is a fully functional independent unit. Its built-in adjustment structure precisely adjusts the distance between the two centering units to accommodate core samples of different lengths; the limiting structure ensures that the core sample ends are firmly constrained and that the axis is aligned with the rotation axis of the rotation drive component. The rotation drive component integrated into the centering unit drives the core sample to perform highly repeatable step rotations during acquisition. The synergistic effect of these three features transforms the "spatial positioning" and "attitude control" of the core sample from a vague process dependent on operator feel and experience into precise and reproducible process parameters guaranteed by mechanical structures and servo systems. This fundamentally eliminates error sources such as axial movement and angular randomness caused by manual rotation, resulting in an extremely stable and predictable spatial geometric relationship in the acquired image sequence. Therefore, whether for automated panoramic image stitching or 3D surface reconstruction based on multi-view images, high-precision input data can be obtained, providing a reliable geometric basis for the quantitative measurement and analysis of crack width and pore area, significantly improving the objectivity and authority of the detection data.

[0018] The image acquisition device for core samples provided in this embodiment represents a breakthrough in efficiency compared to existing technologies. Furthermore, by replacing manual operation with a precision mechanical structure, it achieves a qualitative leap in the geometric accuracy and consistency of data acquisition. This device not only reduces the labor intensity and skill threshold for operators but also provides a powerful standardized tool for the digital and refined evaluation of engineering quality by improving detection efficiency and result reliability, demonstrating significant economic value and application prospects.

[0019] The technical solution adopted in this application also provides an image acquisition method for core samples, based on the image acquisition device for core samples proposed in any of the foregoing claims, including the following steps: A. Prepare multiple core samples, and remove portions or the entirety of multiple sets of centering seats, equal in number to the core samples, from the corresponding guide members; B. Install the multiple core samples one-to-one on the multiple sets of centering seats, and fix the core samples relative to the centering seats along their own axial direction through the adjustment structure and the limiting structure; C. Reset the multiple sets of centering seats one by one onto the multiple guide members; D. The linear drive component moves the appearance data acquisition component, causing it to face one of the core samples; E. Activate the appearance data acquisition component to complete a single acquisition of the core sample's appearance data; F. The core sample is rotated by a preset angle via the corresponding rotation drive component; G. Repeat steps E and F to complete the acquisition of all the core sample appearance data; H. Repeat steps D to F until all appearance data of the multiple core samples are collected.

[0020] The beneficial effects of the image acquisition method for core samples provided in this embodiment are the same as those of the aforementioned image acquisition device, and will not be repeated here. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is one of the three-dimensional structural schematic diagrams of the image acquisition device provided in the embodiments of this application; Figure 2 This is a second three-dimensional structural schematic diagram of the image acquisition device provided in the embodiments of this application; Figure 3 for Figure 2 Top view; Figure 4 For along Figure 3 Cross-sectional view of line AA in the middle; Figure 5 for Figure 4 A magnified view of a portion of the middle circle at point B; Figure 6 This is a three-dimensional structural diagram of the positioning stage used in the embodiments of this application; Figure 7 This is a three-dimensional structural diagram of the guide component used in the embodiments of this application; Figure 8 for Figure 7 Top view; Figure 9 For along Figure 8 Cross-sectional view of the CC line; Figure 10 For along Figure 8 Cross-sectional view of the DD line; Figure 11 This is an exploded view of the guide and upper connecting pipe used in the embodiments of this application. Figure 12 This is a partially enlarged schematic diagram of the centering bracket used in the embodiments of this application; Figure 13 This is a three-dimensional structural diagram of the centering seat and limiting structure used in the embodiments of this application from an explosion perspective; Figure 14This is a schematic diagram of the exploded structure of 6 in a cross-sectional view, as used in the embodiments of this application. Figure 15 This is an exploded view of the adjustable distance structure used in the embodiments of this application; Figure 16 This is a three-dimensional structural diagram of the rotation drive component used in the embodiments of this application; Figure 17 This is an exploded view of the pre-tightening structure used in the embodiments of this application; Figure 18 This is a three-dimensional structural diagram of the appearance data acquisition component used in the embodiments of this application; Figure 19 This is an exploded structural diagram of the linear drive component used in the embodiments of this application; Figure 20 This is a three-dimensional structural diagram of the vacuum generating assembly used in the embodiments of this application; Explanation of reference numerals in the attached drawings: 1. Positioning platform; 11. Mounting hole; 12. Groove; 2. Centering seat; 21. Slot; 22. Protrusion; 23. Dustproof belt; 3. Appearance data acquisition component; 31. Translation frame; 32. Camera assembly; 321. Linear cylinder; 4. Guide component; 41. Receiving groove; 42. Strip hole; 43. Dust removal port; 44. Upper connecting pipe; 45. Boss; 5. Adjustment structure; 51. First transmission nut; 52. Double-ended screw; 521. Second rotating motor; 6. Limiting structure Structure; 61. Alignment shell; 611. Cavity; 612. Sinking groove; 613. Protrusion; 614. Reserved hole; 62. Elastic ring; 7. Rotation drive component; 71. Alignment frame; 72. Wheel housing; 721. Drive wheel; 722. First rotary motor; 8. Linear drive component; 81. Second transmission nut; 82. Drive screw; 821. Third rotary motor; 9. Pre-tightening structure; 91. Fixing nut; 92. Hand-tightening bolt; 10. Vacuum generating assembly; 101. Lower connecting pipe. Detailed Implementation

[0023] 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.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0025] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0027] Please refer to the following: Figures 1 to 20 The image acquisition device for core samples provided in this application will now be described. The image acquisition device for core samples proposed in this application includes a positioning stage 1, multiple sets of centering seats 2, and an appearance data acquisition component 3.

[0028] The positioning platform 1 forms the basic platform of the device and is fixed to a horizontal working surface by anchor bolts or similar means. On the upper surface of the positioning platform 1, a plurality of mounting holes 11 are spaced apart along the length of the positioning platform 1 (in this embodiment, for ease of description, it is defined as the front-to-back direction); and a guide member 4 is inserted and fixed into each mounting hole 11. This design allows the guide members 4 to form a regular linear array distribution on the positioning platform 1, constructing multiple workstations.

[0029] Multiple sets of centering seats 2 serve as clamping and driving units for the core sample, with the number of sets equal to and corresponding one-to-one with the number of guide members 4. The multiple sets of centering seats 2 are arranged one-to-one on multiple guide members 4, that is, each set of centering seats 2 is set entirely on a corresponding single guide member 4, and each set of centering seats 2 includes two centering seats 2.

[0030] In this embodiment, two centering seats 2 are arranged side by side in the left-right direction, and the two centering seats 2 are mechanically linked by the adjusting structure 5, so that the distance between them can be adjusted synchronously according to the length of the core sample.

[0031] Furthermore, each centering seat 2 has an integrated limiting structure 6 on its upper part for direct contact with and fixing of the end of the core sample, thus forming a combination of "two centering seats 2-core sample".

[0032] In addition, a rotation drive component 7 is integrated on the middle seat 2; the rotation drive component 7 is used to drive the fixed core sample to rotate precisely around its own axis during image acquisition.

[0033] In summary, each workstation can form a complete functional unit that independently completes core sample clamping, centering, fixing, and rotational driving.

[0034] The appearance data acquisition component 3, serving as an image recording unit, is slidably positioned above the positioning stage 1 via a slide rail or linear module. The appearance data acquisition component 3 is connected to a linear drive component 8; the linear drive component 8 precisely controls the forward and backward movement of the appearance data acquisition component 3 along the positioning stage 1. The core function of this design is to enable a single appearance data acquisition component 3, driven by the linear drive component 8, to move sequentially and precisely align with the core sample at any station on the positioning stage 1, thereby performing cyclic image acquisition of multiple core samples.

[0035] This embodiment of the application constructs a work system capable of parallel preparation and serial testing through the aforementioned multi-station layout. Operators can pre-install multiple core samples to be tested offline, clamping and fixing them onto their respective centering seats 2 to form multiple "core sample-fixture" preparation modules. These modules are then batch-installed onto various stations on the positioning stage 1. During data acquisition, the appearance data acquisition component 3 automatically inspects under program control, sequentially acquiring images of each core sample. This process significantly reduces the unavoidable assembly / disassembly and centering waiting time in traditional "single-piece flow," significantly increasing the proportion of effective equipment working time and thus achieving a multiple-fold increase in the efficiency of testing large batches of core samples.

[0036] Furthermore, the adjustable spacing structure 5, limiting structure 6, and rotation drive component 7 integrated at each station work together to ensure high precision in core sample positioning and movement. The adjustable spacing structure 5 ensures that the core sample's axis coincides with the rotation axis; the limiting structure 6 provides a secure, slip-free clamping; and the rotation drive component 7 provides precise angular indexing control. These three components work in tandem to transform the core sample's spatial posture and rotation process from a vague operation relying on human experience into a precisely reproducible process guaranteed by mechanical and servo systems. This fundamentally eliminates the axial movement and angular inconsistencies caused by manual rotation, resulting in a stable and consistent geometric relationship in the acquired image sequence. This provides a reliable data foundation for subsequent high-precision image stitching and 3D reconstruction, greatly improving the accuracy and authority of quantitative analysis of surface defects such as cracks and holes.

[0037] The image acquisition device for core samples provided in this embodiment represents a breakthrough in efficiency compared to existing technologies. Furthermore, by replacing manual operation with a precision mechanical structure, it achieves a qualitative leap in the geometric accuracy and consistency of data acquisition. This device not only reduces the labor intensity and skill threshold for operators but also provides a powerful standardized tool for the digital and refined evaluation of engineering quality by improving detection efficiency and result reliability, demonstrating significant economic value and application prospects.

[0038] In some embodiments, such as Figures 12 to 14 As shown, the limiting structure 6 specifically includes an alignment shell 61 and an elastic ring 62.

[0039] The alignment shell 61 is fixedly installed on the upper side of the centering seat 2, and a cavity 611 is machined inside it. The opening of the cavity 611 faces the middle area between the two corresponding centering seats 2 in the same group, so as to allow the end of the core sample to be inserted. On the inner circumferential surface of the cavity 611, a ring-shaped recessed groove 612 is machined.

[0040] The elastic ring 62 is made of a high-friction elastic material such as rubber or polyurethane, and it is interference-fitted into the sinking groove 612. Typically, its embedded end has an outward protrusion structure, and a corresponding concave ring groove is provided at the bottom edge of the sinking groove 612 to prevent it from detaching from the sinking groove 612.

[0041] During the design phase, an elastic ring 62 with an inner diameter slightly smaller than that of the core sample is typically selected. Based on this, when the end of the core sample is inserted, the elastic ring 62 undergoes elastic deformation, thereby tightly gripping the outer circumference of the core sample and achieving reliable interference fit fixation. At the same time, the elastic ring 62 is designed to rotate freely within the sinker 612.

[0042] The lower end of the alignment shell 61 has a downwardly extending protrusion 613. Correspondingly, a slot 21 is provided on the upper side of the centering seat 2 for the protrusion 613 to be inserted. Furthermore, the protrusion 613 is made of an elastic material, and when it is inserted into the slot 21, it generates an interference fit friction force with the inner wall of the slot 21 through elastic deformation, thereby realizing the insertion and fixation between the limiting structure 6 and the centering seat 2.

[0043] In some embodiments, such as Figure 5 , Figure 16 and Figure 17 As shown, the rotation drive component 7 includes a positioning frame 71 and a wheel housing 72.

[0044] The alignment frame 71 is slidably mounted on the upper side of the guide member 4 through the cooperation of the slider and the guide rail; the sliding direction of the alignment frame 71 is parallel to the sliding direction of the centering seat 2, so that the working position of the alignment frame 71 can be adjusted synchronously with the adjustment of the spacing of the centering seat 2.

[0045] The wheel housing 72 is suspended below the alignment frame 71, and the two are connected by a pre-tightening structure 9.

[0046] A drive wheel 721 is mounted on the wheel housing 72 via bearings. The shaft of the drive wheel 721 is set to be parallel to the central axis of the cavity 611 in the alignment housing 61. Furthermore, the drive wheel 721 is connected to the first rotating motor 722 via a synchronous belt or coupling.

[0047] The pre-tensioning structure 9 allows the operator to finely adjust the vertical height of the wheel housing 72 relative to the alignment frame 71. This adjustment allows the drive wheel 721 to pass downwards through the pre-drilled hole 614 in the alignment housing 61 and press against the outer circumferential surface of the elastic ring 62 with a certain pressure. When the first rotating motor 722 is started, the drive wheel 721 drives the elastic ring 62 to rotate through friction, thereby causing the core sample held by the elastic ring 62 to rotate synchronously around the axis. This design achieves flexible and reliable power transmission from the drive wheel 721 to the core sample.

[0048] It should be noted that the outer circumferential surface of the elastic ring 62 is usually loaded with a hardening layer, which on the one hand ensures the smoothness of its rotation relative to the positioning shell 61, and on the other hand improves the stability of kinetic energy transmission between the drive wheel 721 and the elastic ring 62.

[0049] In some embodiments, such as Figure 5 , Figure 16 and Figure 17 As shown, the pre-tightening structure 9 includes a fixing nut 91 and a hand-tightening bolt 92.

[0050] The fixing nut 91 is fixed to the top center of the alignment frame 71 by welding or embedding, and its thread axis is set in the vertical direction.

[0051] The hand-tightening bolt 92 is screwed into the fixing nut 91, and the end of the shank of the hand-tightening bolt 92 is rotatably connected to the top of the wheel housing 72 via a thrust bearing or ball joint.

[0052] Rotating the hand-tightening bolt 92 changes its screw-in depth, thereby driving the wheel housing 72 and drive wheel 721 to perform fine-tuning of the overall height. This structure allows the operator to intuitively and accurately set the clamping force of the drive wheel 721 on the elastic ring 62, ensuring effective transmission while avoiding excessive pressure that could damage the core sample or cause overload.

[0053] In some embodiments, such as Figure 4 and Figure 15 As shown, the adjustable structure 5 includes two first transmission nuts 51 and a double-ended screw 52.

[0054] Two first transmission nuts 51 are coaxially arranged and fixedly connected to the bottom of two centering seats 2 respectively.

[0055] The double-ended screw 52 is rotatably supported on the guide member 4 via a bearing housing. The double-ended screw 52 has two threaded sections with opposite directions of rotation, and these two threaded sections respectively engage with the two first transmission nuts 51.

[0056] One end of the double-ended screw 52 is connected to the output shaft of a second rotary motor 521 via a coupling. When the second rotary motor 521 drives the double-ended screw 52 to rotate, under the action of the reverse thread, the two first transmission nuts 51 drive their respective connected centering seats 2 to perform synchronous opposite or backward movements, thereby realizing precise and synchronous adjustment of the distance between the two centering seats 2.

[0057] In some embodiments, such as Figure 4 , Figure 9 and Figure 12 As shown, a long strip-shaped receiving groove 41 is provided on the upper side of the guide member 4; specifically, the receiving groove 41 has a rectangular cross-section, and its length direction is parallel to the left and right directions.

[0058] Both centering seats 2 are embedded in the receiving groove 41 and can slide along the length of the receiving groove 41.

[0059] To guide the centering seat 2, the bottom of the receiving groove 41 has two parallel strip holes 42 arranged in the left-right direction, each corresponding to the position of one of the centering seats 2. Based on this, each centering seat 2 has a downwardly extending protrusion 22 at its bottom, which extends through the corresponding strip hole 42 to below the guide member 4. At this time, the aforementioned first transmission nut 51 is fixedly installed at the end of the protrusion 22, so that the strip hole 42 guides and limits the movement of the protrusion 22.

[0060] Dustproof strips 23 are also connected to the adjacent inner edges of the two centering seats 2. These dustproof strips 23 are made of a flexible elastic material (such as rubber sheeting), with their ends connected to the inner surface of the centering seat 2 and the bottom surface of the receiving groove 41, respectively. This design seals the gap between the two centering seats 2 and the slotted hole 42, effectively preventing dust particles generated during core sample processing from falling into the mechanical transmission components below, thus providing protection and dust prevention. It also prevents airflow through the slotted hole 42, which could lead to dust fog, ensuring effective image acquisition.

[0061] In some embodiments, such as Figure 4 , Figure 11 and Figure 20 As shown, in order to further optimize the dust removal effect, a dust removal port 43 is also provided in the area between the two dustproof belts 23 at the bottom of the receiving tank 41.

[0062] In this embodiment, the bottom of a single receiving groove 41 has two dust removal ports 43, and the two dust removal ports 43 are respectively located on the front and rear sides of the bearing seat corresponding to the double-ended screw 52.

[0063] Furthermore, an upper connecting pipe 44 is inserted into the dust removal port 43, and the upper connecting pipe 44 extends downward to the space below the guide member 4.

[0064] Based on this, the device also includes a vacuum generating component 10.

[0065] The vacuum generating component 10 is used to create a negative pressure space, and it can be a vacuum pump or a blower.

[0066] The vacuum generating assembly 10 is connected to multiple lower connecting pipes 101; in actual use, the multiple lower connecting pipes 101 are connected to the upper connecting pipes 44 below each guide member 4.

[0067] When the vacuum generating component 10 is working, it generates a continuous negative pressure suction at the dust removal port 43, which can actively suck out fine dust that has crossed the dustproof belt 23 or entered the receiving tank 41 from other ways, thereby keeping the transmission area clean, ensuring the long-term operational reliability of precision components such as the adjusting structure 5, and improving the image acquisition effect.

[0068] In some embodiments, such as Figure 1 , Figure 6 and Figure 7 As shown, the installation method of the guide 4 and the positioning table 1 is as follows: the positioning table 1 is machined with mounting holes 11 that match the cross-sectional shape of the guide 4, and the lower part of the guide 4 is inserted into the corresponding mounting holes 11.

[0069] Furthermore, at least one upward-opening groove 12 is machined on the inner wall of the mounting hole 11. Correspondingly, an outwardly protruding boss 45 is provided on the side wall of the guide member 4.

[0070] When the guide 4 is inserted into the mounting hole 11 to the predetermined depth, the boss 45 falls into the groove 12.

[0071] The structure restricts the vertical movement (especially downward) of the guide member 4 by engaging the boss 45 with the groove 12, thereby enabling the guide member 4 to be quickly positioned and securely fixed on the positioning table 1, while also facilitating the disassembly and maintenance of individual workstation modules.

[0072] It should be noted that the combination of boss 45 and groove 12 can also be mechanically locked by a combination of bolts and threaded grooves.

[0073] In some embodiments, such as Figure 1 , Figure 18 and Figure 19 As shown, the appearance data acquisition component 3 includes a translation frame 31 and a camera assembly 32.

[0074] The translation frame 31 is slidably connected above the positioning table 1 via a linear guide pair, and its sliding direction is the front-to-back direction.

[0075] The camera assembly 32 is mounted on the translation frame 31 via another set of linear guide rails, and its mounting orientation allows the camera assembly 32 to move relative to the translation frame 31 in the vertical direction.

[0076] Furthermore, the camera assembly 32 is connected to the piston rod of a linear cylinder 321, which drives its lifting and lowering.

[0077] The aforementioned linear drive component 8 is used to drive the translation frame 31 to move back and forth, and it includes a second transmission nut 81 and a drive screw 82.

[0078] The second transmission nut 81 is fixedly installed at the bottom of the translation frame 31.

[0079] The drive screw 82 is rotatably supported on the positioning table 1 by a bearing seat, its axis is arranged in the front-back direction, and it is threadedly engaged with the second transmission nut 81.

[0080] One end of the drive screw 82 is connected to the output shaft of a third rotary motor 821. When the third rotary motor 821 drives the drive screw 82 to rotate, the second transmission nut 81 drives the entire translation frame 31 and camera assembly 32 to make precise linear movements along the axial direction (i.e., the front-to-back direction) of the drive screw 82. This design enables precise and rapid switching and positioning of the appearance data acquisition component 3 between different workstations.

[0081] Based on the same inventive concept, this application also provides an image acquisition method for core samples, which is executed based on the image acquisition device for core samples proposed in any of the foregoing claims, and includes the following steps: A. The operator prepares multiple core samples to be inspected and removes multiple sets of centering seats 2, equal in number to the core samples, from the corresponding guide components 4 as a whole.

[0082] B. On the offline workbench, multiple core samples are installed one by one onto multiple sets of centering seats 2; by adjusting the adjustment structure 5 of each set of centering seats 2 to match the length of the core sample, and using the limiting structure 6 to firmly fix both ends of the core sample, so that the core sample cannot move relative to the centering seat 2 along its own axis.

[0083] C. The multiple sets of centering seats 2 that have completed the core sample clamping are reset and installed one by one onto the multiple guide parts 4 of the positioning stage 1 as an integral module.

[0084] D. Start the device and move the appearance data acquisition component 3 by the linear drive component 8, so that it first faces and positions itself in the best shooting position directly in front of (or directly above) one of the core samples in the first batch.

[0085] E. Activate the appearance data acquisition component 3 (e.g., trigger the camera) to complete a single acquisition of the appearance image data of the core sample at the current angle.

[0086] F. The core sample is precisely rotated by a preset angle (e.g., 15 degrees or 30 degrees) by the rotation drive component 7 corresponding to the workstation.

[0087] G. Repeat steps E and F until the core sample rotates one full revolution, completing the acquisition of all circumferential appearance image data of the core sample.

[0088] H. Control the linear drive component 8 to move the appearance data acquisition component 3 to the next station. For the next core sample, repeat the acquisition process from step D to step G. Repeat this cycle until all appearance data of all core samples on the positioning stage 1 are acquired.

[0089] This method separates the processes of "offline batch pre-assembly clamping" and "online automatic cyclic acquisition," transforming a significant amount of auxiliary time (assembly, disassembly, and alignment) in traditional serial operations into parallel preparatory work. This enables the core image acquisition unit of the device to operate continuously and efficiently, increasing the sample throughput of a single device to several times that of traditional manual methods, greatly meeting the urgent needs of laboratories for rapid appearance screening of batch core samples.

[0090] Meanwhile, this method solidifies the mechanical precision guaranteed by the device into a standardized operating procedure. Each core sample undergoes the exact same program-controlled clamping, rotation, and acquisition process, ensuring a high degree of consistency in testing conditions for all samples within the same batch. This standardized operation eliminates skill differences and random errors caused by different operators, resulting in excellent repeatability and comparability of test results. This provides reliable methodological support for establishing traceable and mutually recognized digital testing archives.

[0091] The above content is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An image acquisition device for core samples, characterized in that, include: A positioning platform is used to be fixedly set on a horizontal surface and has multiple guide members spaced apart in the front-back direction; Multiple sets of centering seats are correspondingly arranged on multiple guide members; each set of centering seats includes two centering seats arranged side by side in the left-right direction, and the two centering seats are connected by an adjusting structure; each centering seat has a limiting structure for contacting the end of the core sample, and also has a rotation driving member for driving the core sample to rotate; and An appearance data acquisition component is slidably mounted on the positioning platform in the front-to-back direction, and is connected to a linear drive component for driving the appearance data acquisition component toward any of the core samples fixed by the centering seats, so as to acquire and record the appearance data of the outer peripheral surface of the core sample.

2. The image acquisition device for core samples as described in claim 1, characterized in that, The limiting structure includes: An alignment shell, disposed on the upper side of the alignment seats, has a cavity open towards the middle region of the two alignment seats; the cavity is for inserting the end of the core sample, and a recessed groove with its ends connected is formed on the inner circumferential surface of the cavity; and An elastic ring, fitted into the recessed groove, is used to be sleeved on the outer periphery of the core sample and undergo elastic deformation to make an interference fit with the outer peripheral surface of the core sample; and the elastic ring has a degree of freedom of rotation relative to the positioning shell, and the rotation drive member is connected to the elastic ring in a transmission manner. The lower end of the alignment shell has a downwardly extending protrusion, and the upper side of the centering seat has a slot suitable for inserting the protrusion. Furthermore, the protrusion is made of an elastic material, and when the protrusion is inserted into the slot, the protrusion and the inner wall of the slot are in an interference fit.

3. The image acquisition device for core samples as described in claim 2, characterized in that, The upper end face of the alignment shell has a reserved hole communicating with the sinking groove, and the rotation drive component includes: The alignment frame is slidably mounted on the guide member, and its sliding direction is parallel to the sliding direction of the centering seat; and A wheel housing is disposed on the lower side of the alignment frame and is connected to the alignment frame through a pre-tightening structure; a drive wheel is rotatably disposed on the wheel housing, the axis of the drive wheel is parallel to the central axis of the cavity, and the drive wheel is driven by a first rotary motor for driving its rotation. The pre-tightening structure enables the wheel housing to move vertically relative to the alignment frame, so that the drive wheel passes through the pre-drilled hole and abuts against the outer circumferential surface of the elastic ring. When the drive wheel abuts against the elastic ring, the first rotating motor drives the drive wheel to rotate, and the elastic ring drives the core sample to rotate synchronously.

4. The image acquisition device for core samples as described in claim 3, characterized in that, The pre-tightening structure includes: A fixing nut is fixedly mounted on the alignment frame, and its axial direction is parallel to the vertical direction; and The hand-tightening bolt is connected to the fixing nut, and its lower end is rotatably connected to the top surface of the wheel housing in the vertical direction.

5. The image acquisition device for core samples as described in claim 1, characterized in that, The adjustment structure includes: Two first transmission nuts, coaxially arranged, are respectively fixedly mounted on the two centering seats; and A double-ended screw is rotatably mounted on the guide member, and has two threaded portions with opposite thread directions. The two threaded portions are respectively threadedly connected to the two first transmission nuts, so that when the double-ended screw rotates, the two first transmission nuts respectively drive the two centering seats to move towards each other or away from each other. The double-headed screw drive is connected to a second rotary motor for driving its rotation.

6. The image acquisition device for core samples as described in claim 5, characterized in that, The guide member has a receiving groove on its upper side, and the centering seat is slidably disposed in the receiving groove; The bottom of the receiving groove is provided with two strip holes corresponding to the two centering seats respectively. Each centering seat has a protrusion that passes through the corresponding strip hole and extends out, and the first transmission nut is fixedly mounted on the protrusion. Furthermore, dustproof belts are connected to adjacent sides of both centering seats; the dustproof belts are made of elastic material and their ends are connected to the bottom of the receiving groove to restrict dust particles from passing through the strip holes.

7. The image acquisition device for core samples as described in claim 6, characterized in that, The bottom of the receiving tank is also provided with a dust removal port, which is located between the two dustproof strips, and an upper connecting pipe extending to the lower side of the guide is inserted into the dust removal port. The image acquisition device for core samples also includes: A vacuum generating assembly is used to create a negative pressure environment and is connected to multiple lower connecting pipes, each of which is connected to the upper connecting pipe so that the suction force generated by the negative pressure environment acts on the dust particles in the receiving tank.

8. The image acquisition device for core samples as described in claim 1, characterized in that, The positioning platform has multiple mounting holes that correspond one-to-one with the multiple guide members, and each guide member is inserted into the corresponding mounting hole; Each of the mounting holes has a groove on its inner wall that extends through the upper side of the positioning platform, and the guide has a boss adapted to be fitted into the groove to restrict the guide from moving downward relative to the positioning platform.

9. The image acquisition device for core samples as described in claim 1, characterized in that, The appearance data acquisition component includes: A translational frame is slidably mounted on the upper side of the positioning platform in the front-to-back direction; and The camera assembly is mounted on the translation frame and has the degree of freedom to move relative to the translation frame in the vertical direction, and is connected to a linear cylinder for transmission. Furthermore, the linear drive component includes: The second transmission nut is fixedly mounted on the translation frame, and its axial direction is parallel to the front-rear direction; and The drive screw is rotatably mounted on the positioning platform and threadedly connected to the second transmission nut; The drive screw is connected to a third rotary motor for driving its rotation.

10. A method for acquiring images of core samples, based on the image acquisition device for core samples according to any one of claims 1-9, characterized in that, Includes the following steps: A. Prepare multiple core samples, and remove portions or the entirety of multiple sets of centering seats, equal in number to the core samples, from the corresponding guide members; B. Install the multiple core samples one-to-one on the multiple sets of centering seats, and fix the core samples relative to the centering seats along their own axial direction through the adjustment structure and the limiting structure; C. Reset the multiple sets of centering seats one by one onto the multiple guide members; D. The linear drive component moves the appearance data acquisition component, causing it to face one of the core samples; E. Activate the appearance data acquisition component to complete a single acquisition of the core sample's appearance data; F. The core sample is rotated by a preset angle via the corresponding rotation drive component; G. Repeat steps E and F to complete the acquisition of all the core sample appearance data; H. Repeat steps D to F until all appearance data of the multiple core samples are collected.

Images