Raster scanning auxiliary device for synchronous scanning of multiple broken stones

Abstract

The utility model relates to a raster scanning auxiliary device for synchronous scanning of multiple broken stones. The raster scanning auxiliary device comprises a multiple broken stone storage disc, a first fixing frame and a second fixing frame. The first fixing frame and the second fixing frame are located on the axis of the multiple broken stone containing discs and movably connected with the multiple broken stone containing discs so that the multiple broken stone containing discs can be clamped between the first fixing frame and the second fixing frame at different angles. Wherein a fixing disc is arranged at the circle center position of the multi-gravel storage disc, a plurality of gravel storage devices which are symmetrically distributed around the circumference of the fixing disc are arranged in the multi-gravel storage disc, and star-shaped reflective paint marks used for providing space positioning datum points are arranged on the surface of the multi-gravel storage disc; each stone placing device comprises a sliding rail clamping groove, a pushing piece and a spring, the pushing piece and the spring are arranged in the sliding rail clamping groove, one end of the spring is fixedly connected with the fixed disc, and the other end of the spring is fixedly connected with the pushing piece so as to drive the pushing piece to be close to or away from the fixed disc, so that broken stones of different sizes are clamped. The device can effectively improve the gravel scanning efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of road pavement material research technology, specifically relating to a grating scanning auxiliary device for simultaneous scanning of multiple crushed stones. Background Technology

[0002] Crushed stone, as a key aggregate in infrastructure projects, directly determines the mechanical properties and durability of roadbeds and tracks through its micro-morphology, such as angularity and texture. Especially in scenarios like high-speed rail ballastless tracks, particle geometric anisotropy can cause contact force chain distortion, rendering the traditional homogeneous material assumption invalid. Therefore, it is essential to obtain micro-parameters such as particle size distribution and protrusion index through 3D scanning for correlation analysis between particle morphology and structural stability. However, existing structured light scanning technology faces severe limitations: single-particle scanning requires multiple manual adjustments to eliminate blind spots, and single-sample modeling takes up to 25 minutes, making it difficult to meet analysis cycle requirements; angular features lead to a high rate of overlap and missing points in point cloud data, and reliance on manual registration not only easily introduces morphological errors but also exponentially reduces batch processing efficiency, ultimately hindering the application of the "scan-modeling-simulation" technology chain in engineering sites. A systemic technological innovation to improve efficiency and accuracy is urgently needed. Utility Model Content

[0003] To address the aforementioned problems in the existing technology, this utility model provides a grating scanning auxiliary device for simultaneous scanning of multiple fragments. The technical problem to be solved by this utility model is achieved through the following technical solution:

[0004] This utility model provides a grating scanning auxiliary device for simultaneous scanning of multiple stones, comprising: a multiple stone placement tray, a first fixing frame, and a second fixing frame; the first fixing frame and the second fixing frame are located on the axis of the multiple stone placement tray and are movably connected to the multiple stone placement tray to allow the multiple stone placement tray to be locked between the first fixing frame and the second fixing frame at different angles; wherein, a fixing plate is provided at the center of the multiple stone placement tray, and multiple stone holders are provided inside the multiple stone placement tray symmetrically distributed around the circumference of the fixing plate; the surface of the multiple stone placement tray is provided with star-shaped reflective paint markings for providing spatial positioning reference points; each stone holder includes: a slide rail groove, a pusher, and a spring, the pusher and the spring are disposed in the slide rail groove, one end of the spring is fixedly connected to the fixing plate, and the other end is fixedly connected to the pusher, so as to drive the pusher to move closer to or away from the fixing plate, thereby clamping stones of different sizes.

[0005] Optimally, the multi-crush stone storage tray is further fixed with a first indexing plate and a second indexing plate distributed along the axis of the multi-crush stone storage tray; each indexing plate has multiple positioning grooves evenly distributed in a ring on its surface; a first spring pin is fixed to the side wall of the first fixing frame, the first spring pin being perpendicular to the axis of the first indexing plate, and can be embedded into a positioning groove of the first indexing plate under its own spring force to achieve rigid locking; a second spring pin is fixed to the side wall of the second fixing frame, the second spring pin being perpendicular to the axis of the second indexing plate, and can be embedded into a positioning groove of the second indexing plate under its own spring force to achieve rigid locking.

[0006] Ideally, the multi-gravel storage tray has multiple square through holes symmetrically distributed around the circumference of the fixed tray, and a slide rail slot is fixedly installed in one of the square through holes.

[0007] Ideally, the first fixing frame and the second fixing frame have the same structure; the first fixing frame further includes a support; one end of the support is provided with the first spring pin, and the other end is fixed to the turntable by multiple fixing buckles.

[0008] Optimally, the support includes: a first support rod and a second support rod that are perpendicular to each other; one end of the first support rod is fixed with the first spring pin, and the other end is fixedly connected to the second support rod; the plurality of fixing buckles are evenly distributed on the second support rod to fix the second support rod and the turntable.

[0009] Ideally, the height of the first support rod is adjustable.

[0010] Ideally, the surface of the multi-gravel storage tray is coated with a non-reflective coating.

[0011] Ideally, the material of the multi-gravel storage tray is rigid plastic.

[0012] Ideally, each pusher has a rubber friction layer on the contact surface with the crushed stone.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] To address the issues of low scanning efficiency and reliance on manual data stitching in existing gravel scanning devices, this invention provides a grating scanning auxiliary device for simultaneous scanning of multiple gravel particles. This device employs a ring-array type tray structure, which can simultaneously fix multiple gravel samples. Combined with an indexing plate-spring pin linkage mechanism, it achieves rapid multi-angle positioning scanning, overcoming the efficiency bottleneck of traditional single-particle gravel sequential scanning. Furthermore, the tray surface is equipped with asymmetrical star-shaped reflective reference marks, providing a stable spatial positioning reference system for multi-view point cloud data, reducing manual adjustment time and errors, and significantly shortening the entire process cycle from data acquisition to 3D reconstruction. This provides an efficient and reliable digital solution for engineering gradation analysis. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a grating scanning auxiliary device for simultaneous scanning of multiple fragments provided by this utility model;

[0016] Figure 2 This is a top view of a grating scanning auxiliary device for simultaneous scanning of multiple fragments provided by this utility model;

[0017] Figure 3 This is a schematic diagram of the assembly of a grating scanning auxiliary device for simultaneous scanning of multiple fragments provided by this utility model.

[0018] Figure label:

[0019] 1-Multi-gravel storage tray; 2-First fixing frame; 3-Second fixing frame; 4-Gravel; 5-Turntable; 11-Fixing plate; 12-Stone holder; 13-Star-shaped reflective paint mark; 14-First indexing plate; 15-Second indexing plate; 16-Square through hole; 21-First spring pin; 22-Support; 23-Fixing buckle; 31-Second spring pin; 121-Slide rail groove; 122-Push piece; 123-Spring; 221-First support rod; 222-Second support rod. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0021] Figure 1 This is a schematic diagram of the structure of a grating scanning auxiliary device for simultaneous scanning of multiple fragments provided by this utility model. Figure 2 This is a top view of a grating scanning auxiliary device for simultaneous scanning of multiple fragments provided by this utility model. Figure 3 This is a schematic diagram of the assembly of a grating scanning auxiliary device for simultaneous scanning of multiple fragments provided by this utility model.

[0022] Please refer to Figure 1The system includes: a multi-stone storage tray 1, a first fixing frame 2, and a second fixing frame 3; the first fixing frame 2 and the second fixing frame 3 are located on the axis of the multi-stone storage tray 1 and are movably connected to the multi-stone storage tray 1 to allow the multi-stone storage tray 1 to be locked between the first fixing frame 2 and the second fixing frame 3 at different angles; wherein, a fixing plate 11 is provided at the center of the multi-stone storage tray 1, and a plurality of stones are symmetrically distributed around the circumference of the fixing plate 11 inside the multi-stone storage tray 1. The surface of the multi-gravel storage tray 1 is provided with star-shaped reflective paint markings 13 for providing spatial positioning reference points. Each stone holder 12 includes: a slide rail slot 121, a pusher 122 and a spring 123. The pusher 122 and the spring 123 are disposed in the slide rail slot 121. One end of the spring 123 is fixedly connected to the fixed plate 11, and the other end is fixedly connected to the pusher 122 to drive the pusher 122 to move closer to or away from the fixed plate 11, thereby clamping gravel 4 of different sizes.

[0023] It should be noted that during the actual filming process, the tilt angle of the multi-gravel storage tray 1 was changed by manually placing it with the connecting line between the first fixed frame 2 and the second fixed frame 3 as the axis.

[0024] Here, the multi-gravel storage tray 1, the first fixing frame 2, and the second fixing frame 3 are connected by a "spring pin-indexing plate" method. Specifically, the multi-gravel storage tray 1 is also fixed with a first indexing plate 14 and a second indexing plate 15 distributed along the axis of the multi-gravel storage tray 1; multiple positioning grooves are evenly distributed in a ring on the surface of each indexing plate; a first spring pin 21 is fixed to the side wall of the first fixing frame 2, the first spring pin 21 is perpendicular to the axis of the first indexing plate 14, and can be embedded into a positioning groove of the first indexing plate 14 under its own spring force to achieve rigid locking; a second spring pin 31 is fixed to the side wall of the second fixing frame 3, the second spring pin 31 is perpendicular to the axis of the second indexing plate 15, and can be embedded into a positioning groove of the second indexing plate 15 under its own spring force to achieve rigid locking.

[0025] For example, the first indexing plate 14 and the second indexing plate 15 have the same structure. The number of grooves engraved on the first indexing plate 14 can be 24 to 360. When the number of grooves is 24, the included angle between two adjacent grooves is 15 degrees.

[0026] Here, the star-shaped reflective paint mark 13 is an asymmetrical pentagonal star. When the multi-gravel storage tray 1 rotates, the star-shaped reflective paint mark 13 forms a rigid reference frame. This facilitates subsequent use by external data analysis platforms to seamlessly stitch multi-view point clouds based on the position of the star-shaped reflective paint mark 13, utilizing existing feature point constraint optimization algorithms (such as the iterative nearest point algorithm and the RANSAC algorithm). This effectively eliminates manual registration errors, significantly shortens the 3D reconstruction cycle, and ensures that the model stitching accuracy meets engineering requirements. Alternatively, technicians can manually stitch the clouds based on the position of the star-shaped reflective paint mark 13, reducing the time and error associated with manual adjustments.

[0027] The structure of the multi-gravel storage tray 1 will now be described in detail. Please refer to [link / reference]. Figure 2 The multi-gravel storage tray 1 has multiple square through holes 16 symmetrically distributed around the fixed disk 11. A slide rail groove 121 is fixedly installed in one of the square through holes 16. For example, there are 8 square through holes 16, and each square through hole 16 is provided with a slide rail groove 121. In addition, the spring 123 fixes the push plate 122 and the fixed disk 11. The contact surface of each push plate 122 that contacts the gravel 4 is provided with a rubber friction layer to increase the clamping force of the gravel 4 through friction and prevent the gravel 4 from falling.

[0028] In one possible implementation, to reduce manufacturing costs and alleviate clamping weight, the multi-crushing stone storage tray 1 is made of rigid plastic. Furthermore, it is manufactured using either integral molding or 3D printing.

[0029] In one possible implementation, the surface of the multi-gravel storage tray 1 is coated with a non-reflective coating to prevent light interference and to make the gravel structure stand out more clearly.

[0030] The structure of the first fixing frame 2 and the second fixing frame 3 is described below. Please refer to... Figure 1 and Figure 3 To ensure uniform force distribution, the first fixing frame 2 and the second fixing frame 3 have identical structures. Here, in addition to the first spring pin 21, the first fixing frame 2 also includes a support 22; one end of the support 22 is provided with the first spring pin 21, and the other end is fixed to the turntable 5 by multiple fixing buckles 23. The support 22 includes a first support rod 221 and a second support rod 222 that are perpendicular to each other; one end of the first support rod 221 is fixed with the first spring pin 21, and the other end is fixedly connected to the second support rod 222; multiple fixing buckles 23 are evenly distributed on the second support rod 222 to fix the second support rod 222 and the turntable 5.

[0031] Correspondingly, in addition to the second spring pin 31, the second fixing frame 3 also includes a support 32; one end of the support 32 is provided with an angle-adjustable buckle 31, and the other end is fixed to the turntable 5 by multiple fixing buckles 33. The support 32 includes a third support rod 321 and a fourth support rod 322 that are perpendicular to each other; one end of the third support rod 321 is fixed with the second spring pin 31, and the other end is fixedly connected to the fourth support rod 322; multiple fixing buckles 33 are evenly distributed on the fourth support rod 322 to fix the fourth support rod 322 and the turntable 5.

[0032] In one possible implementation, the height of the first support rod 221 is adjustable. Technicians can adjust the height of the first support rod 221 as needed.

[0033] In actual operation, after fully considering the size of the stone particles and the focal length of the lens, the scanning device is installed and set up. The computer is connected to the optical camera and projection equipment to complete the alignment and focusing of the scanning device. The scanner is calibrated by changing its position multiple times using a checkerboard calibration plate. Then, the first fixing frame 2 and the second fixing frame 3 are fixed above the turntable 5 using four fixing buckles. The stone to be scanned is inserted into the slide rail slot 121 of the multi-stone storage tray 1 by the push plate 122. The multi-stone storage tray 1 is fixed at a preset angle by the first spring pin 21 on the first fixing frame 2 and the second spring pin 31 on the second fixing frame 3 respectively embedding into a groove of the first indexing plate 14 and the second indexing plate 15. The turntable 5 rotates automatically and takes pictures at different angles. After the pictures are taken, the first spring pin 21 and the second spring pin 31 are pulled out to release the fixation of the multi-stone storage tray 1. Adjust the position of the first spring pin 21 and the second spring pin 31 into the grooves of the first indexing plate 14 and the second indexing plate 15, change the tilt angle of the multi-gravel placement plate 1 relative to the scanning instrument, repeat the above scanning process, and obtain the scanning results of multiple gravel 4 in different postures.

[0034] To address the issues of low scanning efficiency and reliance on manual data stitching in existing gravel scanning devices, this invention provides a grating scanning auxiliary device for simultaneous scanning of multiple gravel particles. This device employs a ring-array type tray structure, which can simultaneously fix multiple gravel samples. Combined with an indexing plate-spring pin linkage mechanism, it achieves rapid multi-angle positioning scanning, overcoming the efficiency bottleneck of traditional single-particle gravel sequential scanning. Furthermore, the tray surface is equipped with asymmetrical star-shaped reflective reference marks, providing a stable spatial positioning reference system for multi-view point cloud data, reducing manual adjustment time and errors, and significantly shortening the entire process cycle from data acquisition to 3D reconstruction. This provides an efficient and reliable digital solution for engineering gradation analysis.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the present invention's conception through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A grating scanning auxiliary device for simultaneous scanning of multiple fragments, characterized in that, include: A multi-gravel storage tray (1), a first fixing frame (2), and a second fixing frame (3); The first fixing frame (2) and the second fixing frame (3) are located on the axis of the multi-crushed stone storage tray (1) and are movably connected to the multi-crushed stone storage tray (1) so that the multi-crushed stone storage tray (1) can be locked between the first fixing frame (2) and the second fixing frame (3) at different angles. Among them, a fixed plate (11) is provided at the center of the multi-crushed stone storage tray (1), and multiple stone holders (12) are provided inside the multi-crushed stone storage tray (1) symmetrically distributed around the fixed plate (11). The surface of the multi-crushed stone storage tray (1) is provided with star-shaped reflective paint markings (13) for providing spatial positioning reference points. Each stone holder (12) includes: a slide rail slot (121), a pusher (122), and a spring (123). The pusher (122) and the spring (123) are disposed in the slide rail slot (121). One end of the spring (123) is fixedly connected to the fixed plate (11), and the other end is fixedly connected to the pusher (122) to drive the pusher (122) to move closer to or away from the fixed plate (11), thereby clamping stones (4) of different sizes.

2. The grating scanning auxiliary device for simultaneous scanning of multiple fragments according to claim 1, characterized in that, The multi-crushed stone storage tray (1) is also fixed with a first indexing plate (14) and a second indexing plate (15) distributed along the axis of the multi-crushed stone storage tray (1); multiple positioning grooves are evenly distributed in a ring on the surface of each indexing plate. The first fixed frame (2) is fixed with a first spring pin (21) on its side wall. The first spring pin (21) is perpendicular to the axis of the first indexing plate (14) and can be embedded in a positioning groove of the first indexing plate (14) under its own spring force to achieve rigid locking. The second fixing frame (3) has a second spring pin (31) fixed on its side wall. The second spring pin (31) is perpendicular to the axis of the second indexing plate (15) and can be embedded in a positioning groove of the second indexing plate (15) under its own spring force to achieve rigid locking.

3. The grating scanning auxiliary device for simultaneous scanning of multiple fragments according to claim 1, characterized in that, The multi-gravel storage tray (1) has multiple square through holes (16) symmetrically distributed around the fixed tray (11) and a slide rail slot (121) is fixedly installed in one of the square through holes (16).

4. The grating scanning auxiliary device for simultaneous scanning of multiple fragments according to claim 2, characterized in that, The first fixing frame (2) and the second fixing frame (3) have the same structure; The first fixing frame (2) further includes a support (22); one end of the support (22) is provided with the first spring pin (21), and the other end is fixed to the turntable (5) by a plurality of fixing buckles (23).

5. The grating scanning auxiliary device for simultaneous scanning of multiple fragments according to claim 4, characterized in that, The support (22) includes: a first support rod (221) and a second support rod (222) that are perpendicular to each other; One end of the first support rod (221) is fixed with the first spring pin (21), and the other end is fixedly connected to the second support rod (222); The plurality of fixing buckles (23) are evenly distributed on the second support rod (222) to fix the second support rod (222) and the turntable (5).

6. The grating scanning auxiliary device for simultaneous scanning of multiple fragments according to claim 5, characterized in that, The height of the first support rod (221) is adjustable.

7. The grating scanning auxiliary device for simultaneous scanning of multiple fragments according to claim 1, characterized in that, The surface of the multi-gravel storage tray (1) is coated with a non-reflective coating.

8. The grating scanning auxiliary device for simultaneous scanning of multiple fragments according to claim 1, characterized in that, The material of the multi-gravel storage tray (1) is hard plastic.

9. The grating scanning auxiliary device for simultaneous scanning of multiple fragments according to claim 1, characterized in that, Each pusher (122) has a rubber friction layer on the contact surface with the crushed stone (4).

Images