A device for detecting appearance defects of civilian explosive materials

Abstract

This utility model discloses a device for detecting appearance defects in civil explosive materials, comprising: a feeding mechanism, a testing workbench, and a visual inspection mechanism; the visual inspection mechanism includes: an annular guide table, a suspension frame, a lower-opening illumination cover, a first-position camera, a second-position camera, and a driving assembly. A first cylinder mounted on the inner wall of the annular guide table drives the first-position camera, and a second cylinder mounted on the inner top wall of the lower-opening illumination cover drives the second-position camera. This enables the cameras to capture images from multiple angles and positions relative to the fixed materials. The materials themselves can be placed on the testing workbench without requiring large-scale, high-speed rotation. This not only reduces mechanical impact and positioning errors caused by rotation, improving the stability of the testing process, but also significantly shortens the time required for a single inspection, thus improving overall testing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of civil explosives testing technology, and in particular to a device for detecting appearance defects in civil explosives. Background Technology

[0002] Currently, the industry mainly relies on manual visual inspection to detect defects in the appearance of civil explosive materials. This method suffers from problems such as low efficiency, missed detections, and high misjudgment rates, making it difficult to meet the requirements of modern production for high efficiency and high reliability.

[0003] To improve inspection efficiency and consistency, automated appearance inspection devices have begun to be adopted. Among them, visual inspection based on a rotating workstation is a relatively common automation solution. The device typically includes a rotating platform on which the explosives are placed. As the platform rotates, a camera mounted in a fixed position can sequentially photograph different areas of the material's surface. However, it is often very difficult to accurately place the material in the center of the rotating platform each time. Even if the initial positioning is acceptable, during rotation, the material's own weight or the platform's mechanical vibration may cause the material to shift or shake. This results in inconsistent relative distances and angles between different points on the material's surface and the lens when the camera captures images, causing image distortion, blurring, or splicing misalignment, affecting the accuracy of subsequent image processing and defect identification. Summary of the Invention

[0004] To address the aforementioned technical problems, this utility model provides a device for detecting appearance defects in civil explosive materials. To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its sole purpose is to present some concepts in a simple form as a prelude to the detailed description that follows.

[0005] The present invention adopts the following technical solution:

[0006] A device for detecting appearance defects in civil explosive materials is provided, comprising: a feeding mechanism, a testing workbench, and a visual inspection mechanism, wherein the visual inspection mechanism is disposed above the testing workbench;

[0007] The visual inspection mechanism includes: an annular guide platform, a suspension frame, a lower-opening illumination cover, a first camera, a second camera, and a drive assembly. The lower-opening illumination cover is connected to the suspension frame via a lifting mechanism. The annular guide platform is disposed inside the opening of the lower-opening illumination cover. The first camera is disposed inside the annular guide platform. The second camera is disposed on the inner top wall of the lower-opening illumination cover. The drive assembly is connected to the outer side of the annular guide platform.

[0008] Furthermore, an annular guide rail is provided inside the opening of the lower opening lighting cover, the upper half of the outer wall of the annular guide platform is connected to the annular guide rail, the lower half of the outer wall of the annular guide platform is connected to the drive assembly through a gear transmission mechanism, a first cylinder is provided on the inner wall of the annular guide platform, and the first camera is located at the actuating end of the first cylinder.

[0009] Furthermore, a second cylinder is provided on the inner top wall of the lower opening lighting cover, and the second camera is located at the actuating end of the second cylinder.

[0010] Furthermore, the detection workbench is a disc-shaped detection workbench, and when the annular guide platform descends to the working position, the detection workbench is located inside the annular guide platform.

[0011] Furthermore, the feeding mechanism consists of two sets of symmetrically arranged clamping mechanisms, and the two sets of clamping mechanisms are respectively arranged on both sides of the detection workbench; the clamping mechanism includes: a longitudinal guide rail, a vertical guide rail, a third cylinder and a clamping plate, the vertical guide rail is connected to the longitudinal guide rail, the third cylinder is arranged on the vertical guide rail, and the clamping plate is arranged on the actuating end of the third cylinder.

[0012] Furthermore, the aforementioned device for detecting appearance defects in civil explosive materials also includes: a material feeding and positioning mechanism and a preparation workbench, wherein the preparation workbench is disposed at the end of the material feeding and positioning mechanism and is disposed between the two sets of clamping mechanisms; a fourth cylinder and a baffle are disposed on the side of the preparation workbench, wherein the baffle is disposed on the actuating end of the fourth cylinder.

[0013] Furthermore, the material conveying and positioning mechanism includes a hopper and a feeding vibrating plate, the feeding vibrating plate being located on the outlet side of the hopper, and the preparation workbench being located at the end of the feeding vibrating plate.

[0014] The beneficial effects of this utility model are as follows: by using a first cylinder installed on the inner wall of the annular guide to drive the first camera, and a second cylinder installed on the top wall of the lower opening illumination cover to drive the second camera, the camera can take pictures from multiple angles and positions relative to the fixed equipment. The equipment itself can be placed on the inspection workbench without the need for large-scale, high-speed rotation. This not only reduces the mechanical impact and positioning error caused by rotation and improves the stability of the inspection process, but also significantly shortens the time required for a single inspection and improves the overall inspection efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Fig. 1 This is a schematic diagram of the structure of a device for detecting appearance defects in civil explosive materials according to this utility model;

[0017] Fig. 2 This is a schematic diagram of the structure of the visual inspection mechanism of this utility model;

[0018] Fig. 3 This is a schematic diagram of the feeding mechanism of this utility model. Detailed Implementation

[0019] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] like Figs. 1-3 As shown in some illustrative embodiments, a device for detecting appearance defects of civil explosive materials is provided, including: a material feeding and positioning mechanism 100, a preparation workbench 200, a feeding mechanism 300, an inspection workbench 400, and a visual inspection mechanism 500. The visual inspection mechanism 500 is disposed above the inspection workbench 400 and is used to detect appearance defects of civil explosive materials placed on the inspection workbench 400.

[0021] The feeding mechanism 300 consists of two symmetrically arranged clamping mechanisms located on both sides of the inspection workbench 400, used to transfer materials from the preparation workbench 200 to the inspection workbench 400. Specifically, the clamping mechanism includes: a longitudinal guide rail 410, a vertical guide rail 420, a third cylinder 430, and a clamping plate 440.

[0022] The longitudinal guide rail 410 allows the clamping mechanism to move along the length of the inspection workbench 400. The guide portion of the vertical guide rail 420 is connected to the moving part of the longitudinal guide rail 410, and the vertical guide rail 420 allows the clamping mechanism to move up and down to accommodate explosive devices of different heights. The fixed end of the third cylinder 430 is connected to the moving part of the vertical guide rail 420, and the clamping plate 440 is set on the actuating end of the third cylinder 430. The third cylinder 430 drives the clamping plate 440 to open and close for gripping and releasing explosive devices.

[0023] The material conveying and positioning mechanism 100 includes a hopper 110 and a feeding vibratory feeder 120. The feeding vibratory feeder 120 is located on the outlet side of the hopper 110, and the preparation workbench 200 is located at the end of the feeding vibratory feeder 120. Explosive materials are first fed from the hopper 110 by the feeding vibratory feeder 120 for initial orientation. The materials then reach the preparation workbench 200 under the push of the feeding vibratory feeder 120. The side of the preparation workbench 200 is equipped with a fourth cylinder 210 and a baffle 220. The baffle 220 is located on the actuating end of the fourth cylinder 210. When the materials reach the designated position, the fourth cylinder 210 drives the baffle 220 to extend, preventing the materials from moving forward and achieving precise positioning, awaiting the clamping mechanism of the feeding mechanism 300 to grab them. The preparation workbench 200 is located at the end of the material conveying and positioning mechanism 100 and is positioned between two sets of clamping mechanisms. The two sets of clamping mechanisms work together to grab the positioned equipment from the preparation workbench 200 and place it on the testing workbench 400.

[0024] The inspection workbench 400 is a disc-shaped inspection platform, slightly larger than the bottom surface of the explosive device. When the device is placed on it, the inspection workbench 400 provides a stable inspection base. During the inspection process, the inspection workbench 400 itself can remain stationary or undergo only very minor adjustments, such as fine-tuning the level. Multi-angle observation is mainly achieved through the movement within the visual inspection mechanism 500.

[0025] The visual inspection mechanism 500 includes: a ring-shaped guide table 510, a suspension frame 520, a lower opening illumination cover 530, a first camera 540, a second camera 550, and a drive assembly 560.

[0026] The annular guide plate 510 is a circular plate with an inner diameter larger than that of the explosive device, allowing the device to be placed on the testing workbench 400 while also being able to rotate around it. The lower outer wall of the annular guide plate 510 is connected to a drive assembly via a gear transmission mechanism. The drive assembly can be a motor, which rotates the annular guide plate 510. The upper outer wall of the annular guide plate 510 engages with the annular guide rail 570 inside the opening of the lower opening illumination cover 530, ensuring smooth rotation and accurate radial positioning.

[0027] The lower-opening illumination cover 530 is an inverted cylindrical shape with its opening facing downwards towards the equipment. The inner side of the lower-opening illumination cover 530 can integrate a ring light source or other types of light sources to provide uniform or specific-angle illumination for the equipment. The lower-opening illumination cover 530 is connected to the suspension frame 520 via a lifting mechanism 580, such as a screw drive or cylinder. The suspension frame 520 is fixed to the frame of the device. The lifting mechanism 580 can adjust the height of the lower-opening illumination cover 530, thereby adjusting the height of the ring guide table 510, so that when the ring guide table 510 descends to the working position, the inspection table 400 is located within the ring guide table 510.

[0028] The first camera 540 is mounted on the inner wall of the annular guide platform 510. More specifically, a first cylinder 511 is mounted on the inner wall of the annular guide platform 510, and the first camera 540 is fixed to the actuating end of the first cylinder 511. When the annular guide platform 510 rotates, the first camera 540 rotates accordingly, allowing for continuous or multi-angle shooting of the side or a specific area of ​​the equipment. The first cylinder 511 can be finely adjusted radially or axially to precisely control the distance and angle between the camera and the surface of the equipment, ensuring image clarity.

[0029] The second camera 550 is mounted on the inner top wall of the lower opening illumination cover 530. Specifically, a second cylinder 531 is mounted on the inner top wall of the lower opening illumination cover 530, and the second camera 550 is fixed to its actuating end. The second camera 550 is used to photograph the equipment from above or at an angle to obtain top or overall appearance information. The second cylinder 531 can adjust the position of the second camera 550 to accommodate equipment of different sizes or shapes and optimize the shooting angle and distance.

[0030] Workflow summary:

[0031] The explosive materials are transported to the preparation workbench 200 by the feeding vibratory plate 120 and positioned by the baffle 220. The longitudinal guide rail 410 and the vertical guide rail 420 adjust the position of the third cylinder 430, and the third cylinder 430 drives the clamping plate 440 to grab the materials.

[0032] The clamping mechanism transports the equipment to the top of the testing workbench 400 and places it on the testing workbench 400, ensuring that the equipment is roughly centered. The clamping mechanism then resets and waits for the next cycle.

[0033] When the visual inspection mechanism 100 starts working, the lifting mechanism 580 moves, causing the lower opening illumination cover 530 to move down, and the annular guide table 510 moves down along with it until the annular guide table 510 surrounds the equipment. Then the annular guide table 510 starts to rotate under the drive component 560, or rotates step by step according to the preset program.

[0034] The first camera 540 rotates with the annular guide 510, while its own first cylinder 511 makes fine adjustments to capture images of the equipment continuously or in segments from the side. At the same time, the second camera 550 is adjusted to a suitable position by its second cylinder 530 to capture images of the top of the equipment from above.

[0035] The captured images are transmitted to the image processing system, which analyzes the images, identifies and records defects. After the inspection is completed, the device can control external mechanisms, such as sorting devices, to classify qualified and unqualified products according to preset logic.

[0036] In existing technologies, rotary workstations often suffer from rotation angle deviations due to mechanical clearances, vibrations, or inaccurate positioning marks, affecting detection accuracy. This application employs a method where a ring-shaped guide table 510 engages with a ring-shaped guide rail inside a lower-opening illumination cover 530, providing radial positioning for the detection station. Simultaneously, the rotation of the ring-shaped guide table 510 is achieved through a gear transmission mechanism with a fixed transmission ratio, enabling precise angle control. Furthermore, the first camera 540 is precisely positioned via a first cylinder 511, and the second camera 550 is precisely positioned via a second cylinder 531, ensuring a stable and precisely adjustable relative position between the cameras and the measured equipment. This avoids the image blurring and misalignment problems caused by inaccurate center positioning or unstable rotation in traditional rotary platforms, significantly improving the accuracy of defect location. Compared to systems requiring a large-scale rotary platform, the core detection component of this application revolves around the ring-shaped guide table 510 and fixed or slightly movable equipment, allowing for a more compact structural layout. The modular design facilitates individual maintenance and replacement, potentially reducing the complexity and cost of long-term maintenance.

[0037] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A device for detecting appearance defects in civil explosive materials, characterized in that, include: The system includes a feeding mechanism, an inspection workbench, and a visual inspection mechanism, wherein the visual inspection mechanism is positioned above the inspection workbench. The visual inspection mechanism includes: an annular guide platform, a suspension frame, a lower-opening illumination cover, a first camera, a second camera, and a drive assembly. The lower-opening illumination cover is connected to the suspension frame via a lifting mechanism. The annular guide platform is disposed inside the opening of the lower-opening illumination cover. The first camera is disposed inside the annular guide platform. The second camera is disposed on the inner top wall of the lower-opening illumination cover. The drive assembly is connected to the outer side of the annular guide platform.

2. The device for detecting appearance defects in civil explosive materials according to claim 1, characterized in that, An annular guide rail is provided inside the opening of the lower opening lighting cover. The upper half of the outer wall of the annular guide platform is connected to the annular guide rail. The lower half of the outer wall of the annular guide platform is connected to the drive assembly through a gear transmission mechanism. A first cylinder is provided on the inner wall of the annular guide platform. The first camera is located at the actuating end of the first cylinder.

3. The device for detecting appearance defects in civil explosive materials according to claim 2, characterized in that, A second cylinder is installed on the inner top wall of the lower opening lighting cover, and the second camera is installed at the actuating end of the second cylinder.

4. The device for detecting appearance defects in civil explosive materials according to claim 3, characterized in that, The testing workbench is a disc-shaped testing workbench. When the annular guide platform descends to the working position, the testing workbench is located inside the annular guide platform.

5. The device for detecting appearance defects in civil explosive materials according to claim 4, characterized in that, The feeding mechanism consists of two sets of symmetrically arranged clamping mechanisms, and the two sets of clamping mechanisms are respectively arranged on both sides of the detection workbench; The clamping mechanism includes: a longitudinal guide rail, a vertical guide rail, a third cylinder, and a clamping plate. The vertical guide rail is connected to the longitudinal guide rail, the third cylinder is disposed on the vertical guide rail, and the clamping plate is disposed on the actuating end of the third cylinder.

6. The device for detecting appearance defects in civil explosive materials according to claim 5, characterized in that, Also includes: The material conveying and positioning mechanism and the preparation worktable are provided. The preparation worktable is located at the end of the material conveying and positioning mechanism and is located between the two sets of clamping mechanisms. A fourth cylinder and a baffle are provided on the side of the preparation worktable. The baffle is located on the actuating end of the fourth cylinder.

7. The device for detecting appearance defects in civil explosive materials according to claim 6, characterized in that, The material conveying and positioning mechanism includes a hopper and a feeding vibrating plate. The feeding vibrating plate is located on the outlet side of the hopper, and the preparation workbench is located at the end of the feeding vibrating plate.

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