An image acquisition device for rock fragmentation analysis

Abstract

The utility model relates to rock blasting block size analysis technical field, and disclose an image acquisition device for rock blasting block size analysis, including unmanned aerial vehicle holder and fixed focus industrial camera, the bottom of unmanned aerial vehicle holder installs the support, the bottom of support is fixed with backplate, both sides of backplate bottom are all fixed with the frame, fixed focus industrial camera is located between two frame, the middle part of both sides of fixed focus industrial camera all is equipped with the limit slot, the frame sliding connection has with the frame fitting limiting plate of limit slot, through installing unmanned aerial vehicle holder on unmanned aerial vehicle, utilize unmanned aerial vehicle to be able to drive fixed focus industrial camera to fly over complex, dangerous or difficult to reach the blast heap area, has reduced the security risk, realized the full coverage collection of true sense, the height is convenient for flexible control, optimization precision and efficiency, and can monitor the shooting height of fixed focus industrial camera through height measurement subassembly.

Description

Technical Field

[0001] This utility model relates to the field of rock blasting block size analysis technology, specifically an image acquisition device for rock blasting block size analysis. Background Technology

[0002] In geotechnical engineering such as mining and tunneling, blasting is the primary means of breaking rocks. The rock block size distribution after blasting is a key indicator for evaluating the blasting effect, directly affecting the efficiency and cost of subsequent processes such as loading and crushing. Traditional block size analysis methods mainly rely on manual on-site measurement and screening. This method is not only labor-intensive, inefficient, and dangerous, but also highly subjective and difficult to guarantee accuracy. In recent years, block size analysis methods based on digital image processing technology have been widely used. This method automatically identifies and calculates the rock block size distribution by acquiring images of blasted piles and using computer algorithms, and has the advantages of high efficiency, objectivity, and safety.

[0003] However, the on-site image acquisition environment is complex. The terrain at the blast site is uneven, and the lighting conditions are varied, such as shadows and overexposure, which seriously affect the image quality. When ordinary cameras take pictures from the side, perspective distortion will occur, which will distort the shape of the rocks and affect the accuracy of the analysis. Operators need to hold the equipment close to the blast site to take pictures, which is inefficient and poses safety hazards.

[0004] Therefore, there is an urgent need for a dedicated device that can efficiently and accurately acquire images of bursts and provide stable support for subsequent image analysis. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an image acquisition device for rock blasting block size analysis, which has the advantages of high efficiency and good image quality, and solves the problems mentioned in the background technology.

[0006] This utility model provides the following technical solution: an image acquisition device for rock blasting block size analysis, including a drone gimbal and a fixed-focus industrial camera. The drone gimbal is equipped with a support at its bottom end, and a back plate is fixedly provided at the bottom end of the support. A frame is fixedly provided on both sides of the bottom end of the back plate. The fixed-focus industrial camera is located between the two frames. Limiting grooves are formed in the middle of both sides of the fixed-focus industrial camera. A limiting plate that engages with the limiting groove is slidably connected to the frame. An elastic support component that provides support for the limiting plate is provided in the middle of the frame. A height measuring component is provided on one side of the bottom end of the back plate. Light strips are fixedly provided on all four sides of the bottom end of the back plate.

[0007] As a preferred embodiment of this utility model, the elastic support assembly includes a slide rod, a spring sleeved on the surface of the slide rod, a turntable fixedly mounted on one end of the slide rod, a sleeve rotatably mounted on the surface of the turntable, the spring being located between the sleeve and the support frame, one side of the sleeve being fixedly connected to the middle of one side of the limiting plate, and a pull button fixedly mounted on the other end of the slide rod.

[0008] As a preferred technical solution of this utility model, a rod groove is provided in the middle of the support frame, the sliding rod is slidably connected to the rod groove, and a damping rubber pad that provides sliding damping for the sliding rod is embedded at the bottom of the rod groove.

[0009] As a preferred embodiment of this utility model, the top of the rod groove is provided with a recess, and the surface of the slide rod is fixedly provided with a protrusion corresponding to the recess.

[0010] As a preferred technical solution of this utility model, the height measurement component includes a bracket, a millimeter-wave radar, and bolts. The top of the bracket is fixedly connected to one side of the bottom of the back plate. Two ear plates are fixedly provided on both sides of the millimeter-wave radar. The ear plates are fixedly connected to the bottom of the bracket by bolts.

[0011] As a preferred technical solution of this utility model, the bottom end of the bracket and the surface of the ear plate are provided with through holes for bolt insertion and connection, and the bolt is threaded with a nut.

[0012] As a preferred embodiment of this utility model, a slide rail is provided in the middle of the card frame, and the limiting plate is slidably connected to the slide rail.

[0013] As a preferred embodiment of this utility model, the inner walls on both sides of the support frame are fixedly provided with guide rails, and the limiting plate is slidably connected to the guide rails.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. By mounting a drone gimbal on a drone, the drone can propel a fixed-focus industrial camera over complex, dangerous, or inaccessible areas of explosive piles, reducing safety hazards and achieving true full-coverage data collection. This allows for flexible altitude control, optimizing accuracy and efficiency. The altitude measurement component monitors the shooting altitude of the fixed-focus industrial camera, demonstrating strong penetration through fog, rain, snow, and dust, thus being less affected by adverse weather conditions. The drone gimbal ensures shooting stability, and the fixed-focus industrial camera can shoot vertically downwards, avoiding perspective distortion caused by oblique side shots. This minimizes distortion of the rock's shape and improves analysis accuracy.

[0016] 2. The back panel provides sun protection, preventing direct sunlight from hitting the fixed-focus industrial camera. The light strip provides supplemental lighting. The frame prevents the fixed-focus industrial camera from shifting horizontally. The support frame and elastic support components support the limiting plate, preventing the fixed-focus industrial camera from falling and facilitating quick installation and removal of the fixed-focus industrial camera. Attached Figure Description

[0017] Figure 1 This is one of the structural schematic diagrams of this utility model;

[0018] Figure 2 This is the second structural schematic diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the fixed-focus industrial camera of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the limiting plate of this utility model;

[0021] Figure 5 This is a cross-sectional structural diagram of the elastic support component of this utility model;

[0022] Figure 6 This is a schematic diagram of the height measuring component of this utility model.

[0023] In the diagram: 1. UAV gimbal; 2. Support; 3. Backplate; 4. Fixed-focus industrial camera; 5. Limiting groove; 6. Frame; 7. Limiting plate; 8. Support frame; 9. Elastic support assembly; 901. Slide rod; 902. Spring; 903. Turntable; 904. Sleeve; 905. Pull button; 906. Protrusion; 10. Slide rail; 11. Guide rail; 12. Rod groove; 13. Damping rubber pad; 14. Recess; 15. Altitude measurement assembly; 1501. Bracket; 1502. Millimeter-wave radar; 1503. Ear plate; 1504. Bolt; 1505. Through hole; 1506. Nut; 16. Light strip. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-6An image acquisition device for analyzing the size of blasted rock fragments includes a drone gimbal 1 and a fixed-focus industrial camera 4. A support 2 is mounted on the bottom of the drone gimbal 1, and a back plate 3 is fixedly mounted on the bottom of the support 2. Frames 6 are fixedly mounted on both sides of the bottom of the back plate 3. The fixed-focus industrial camera 4 is located between the two frames 6. Limiting grooves 5 are formed in the middle of both sides of the fixed-focus industrial camera 4. Limiting plates 7 that engage with the limiting grooves 5 are slidably connected to the frames 6. An elastic support component 9 providing support for the limiting plates 7 is provided in the middle of the frames 6. A height measuring component 15 is provided on one side of the bottom of the back plate 3, and light strips 16 are fixedly mounted on all four sides of the bottom of the back plate 3. The drone gimbal is used to measure the height of the blasted rock fragments. The gimbal 1 is mounted on a drone, which enables the fixed-focus industrial camera 4 to fly over complex, dangerous, or hard-to-reach areas of explosive piles, reducing safety hazards and achieving true full-coverage data acquisition. It facilitates flexible altitude control, optimizes accuracy and efficiency, and can monitor the shooting altitude of the fixed-focus industrial camera 4 through the altitude measurement component 15. The altitude measurement component 15 has strong penetration capabilities through fog, rain, snow, and dust, and is relatively less affected by adverse weather conditions. The drone gimbal 1 can ensure the stability of the shooting, and the fixed-focus industrial camera 4 can shoot vertically downwards, avoiding perspective distortion caused by shooting from the side, and the shape of the rocks is not easily distorted, thus improving the accuracy of analysis.

[0026] In this embodiment, preferably, the elastic support assembly 9 includes a slide rod 901, a spring 902 sleeved on the surface of the slide rod 901, a turntable 903 fixedly mounted on one end of the slide rod 901, a sleeve 904 rotatably mounted on the surface of the turntable 903, the spring 902 located between the sleeve 904 and the support frame 8, one side of the sleeve 904 fixedly connected to the middle of one side of the limiting plate 7, a pull button 905 fixedly mounted on the other end of the slide rod 901, a rod groove 12 opened in the middle of the support frame 8, the slide rod 901 slidably connected to the rod groove 12, and a damping rubber pad 13 providing sliding damping for the slide rod 901 embedded at the bottom of the rod groove 12. The top of the rod groove 12 is provided with a recess 14, and the surface of the slide rod 901 is fixedly provided with a protrusion 906 corresponding to the recess 14. The elastic support assembly 9 can support the limiting plate 7, which can prevent the limiting plate 7 from loosening and thus prevent the fixed-focus industrial camera 4 from falling. It is safe and reliable. By pulling the slide rod 901 with the pull button 905, the sleeve 904 compresses the spring 902, which can move the limiting plate 7 out of the limiting groove 5. By rotating the slide rod 901 with the pull button 905, the protrusion 906 and the recess 14 are misaligned, which can keep the two springs 902 in a contracted state. The limiting plate 7 will not hinder the installation and removal of the fixed-focus industrial camera 4.

[0027] In this embodiment, preferably, the height measurement component 15 includes a bracket 1501, a millimeter-wave radar 1502, and bolts 1504. The top of the bracket 1501 is fixedly connected to one side of the bottom of the back plate 3. Two ear plates 1503 are fixedly provided on both sides of the millimeter-wave radar 1502. The ear plates 1503 are fixedly connected to the bottom of the bracket 1501 by bolts 1504. The bottom of the bracket 1501 and the surface of the ear plates 1503 are provided with through holes 1505 that are inserted and connected to the bolts 1504. The bolts 1504 are threaded with nuts 1506. The bracket 1501 can support the millimeter-wave radar 1502. The millimeter-wave radar 1502 can penetrate fog, rain, snow, and dust, and is less affected by severe weather. It can monitor the shooting height of the fixed-focus industrial camera 4.

[0028] In this embodiment, preferably, a slide rail 10 is provided in the middle of the card frame 6, and the limiting plate 7 is slidably connected to the slide rail 10. Preferably, guide rails 11 are fixedly provided on the inner walls of both sides of the support frame 8, and the limiting plate 7 is slidably connected to the guide rails 11. The limiting plate 7 can be limited by the slide rail 10 and the guide rails 11, which can ensure the linear movement of the limiting plate 7.

[0029] In use, firstly, the slide rod 901 is pulled by the pull button 905 of the elastic support component 9, which compresses the spring 902 by the sleeve 904, and the limiting plate 7 is moved out of the limiting groove 5. Then, the slide rod 901 is rotated by the pull button 905, so that the protrusion 906 and the recess 14 are misaligned, and the spring 902 is kept in a contracted state. After the two limiting plates 7 are contracted, the fixed-focus industrial camera 4 is placed between the two clip frames 6. The clip frames 6 can prevent the fixed-focus industrial camera 4 from being horizontally displaced. Then, the protrusion 906 and the recess 14 are aligned in a straight line, and the spring 902 can push the limiting plate 7 into the limiting groove 5, so that the fixed-focus industrial camera 4 can be quickly installed and prevented from loosening and falling off. The damping rubber pad 13 can provide sliding damping for the slide rod 901.

[0030] After the fixed-focus industrial camera 4 is fixed, the drone gimbal 1 is installed on the drone. The drone can carry the fixed-focus industrial camera 4 to fly over complex, dangerous or hard-to-reach areas of explosive piles, reducing safety hazards and achieving true full coverage data collection. The shooting height of the fixed-focus industrial camera 4 can be monitored by the millimeter-wave radar 1502 of the height measurement component 15. The millimeter-wave radar 1502 has strong ability to penetrate fog, rain, snow and dust and is relatively less affected by bad weather. The drone gimbal 1 can ensure the stability of shooting. The fixed-focus industrial camera 4 can shoot vertically downwards, avoiding the perspective distortion caused by shooting from the side, and the shape of the rocks is not easily distorted, thus improving the accuracy of analysis.

[0031] During the shooting of the rocks, the drone can be freely raised and lowered to dynamically adjust the shooting height. The back panel 3 can act as a sunshade to prevent direct sunlight from shining on the fixed-focus industrial camera 4. The light strip 16 can provide supplementary lighting, which improves the shooting quality and is beneficial for subsequent analysis and evaluation.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An image acquisition device for rock blasting block size analysis, comprising a UAV gimbal (1) and a fixed-focus industrial camera (4), characterized in that: The bottom of the UAV gimbal (1) is equipped with a support (2), and the bottom of the support (2) is fixedly provided with a back plate (3). Both sides of the bottom of the back plate (3) are fixedly provided with a frame (6). The fixed-focus industrial camera (4) is located between the two frames (6). The middle of both sides of the fixed-focus industrial camera (4) is provided with a limiting groove (5). The frame (6) is slidably connected with a limiting plate (7) that engages with the limiting groove (5). The middle of the frame (6) is provided with an elastic support component (9) that provides support for the limiting plate (7). One side of the bottom of the back plate (3) is provided with a height measuring component (15). The four sides of the bottom of the back plate (3) are fixedly provided with light strips (16).

2. The image acquisition device for rock blasting block size analysis according to claim 1, characterized in that: The elastic support assembly (9) includes a slide rod (901), a spring (902) is sleeved on the surface of the slide rod (901), a turntable (903) is fixedly provided at one end of the slide rod (901), a sleeve (904) is rotatably provided on the surface of the turntable (903), the spring (902) is located between the sleeve (904) and the support frame (8), one side of the sleeve (904) is fixedly connected to the middle of one side of the limiting plate (7), and a pull button (905) is fixedly provided at the other end of the slide rod (901).

3. The image acquisition device for rock blasting block size analysis according to claim 2, characterized in that: The support frame (8) has a rod groove (12) in the middle, the slide rod (901) is slidably connected to the rod groove (12), and a damping rubber pad (13) is embedded at the bottom of the rod groove (12) to provide sliding damping for the slide rod (901).

4. The image acquisition device for rock blasting block size analysis according to claim 3, characterized in that: The top of the rod groove (12) is provided with a recess (14), and the surface of the slide rod (901) is fixedly provided with a protrusion (906) corresponding to the recess (14).

5. The image acquisition device for rock blasting block size analysis according to claim 1, characterized in that: The height measurement component (15) includes a bracket (1501), a millimeter-wave radar (1502), and bolts (1504). The top of the bracket (1501) is fixedly connected to one side of the bottom of the back plate (3). Two ear plates (1503) are fixedly provided on both sides of the millimeter-wave radar (1502). The ear plates (1503) are fixedly connected to the bottom of the bracket (1501) by bolts (1504).

6. The image acquisition device for rock blasting block size analysis according to claim 5, characterized in that: The bottom end of the bracket (1501) and the surface of the ear plate (1503) are provided with through holes (1505) for insertion and connection with bolts (1504), and the bolts (1504) are threaded with nuts (1506).

7. The image acquisition device for rock blasting block size analysis according to claim 1, characterized in that: The card frame (6) has a slide (10) in the middle, and the limiting plate (7) is slidably connected to the slide (10).

8. The image acquisition device for rock blasting block size analysis according to claim 2, characterized in that: The inner walls on both sides of the support frame (8) are fixed with guide rails (11), and the limiting plate (7) is slidably connected to the guide rails (11).

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