A detection device for identifying the particle size of a material

Abstract

The utility model relates to material particle size identification field, specifically disclose a kind of detection device for identifying material particle size, including the feeding groove with vibration system, inlet pipe, photographing room, light source installation place and dust collection device;The feeding groove is set above the inlet of inlet pipe, the photographing room with the light source installation place is on the same horizontal line and the horizontal line with the inlet pipe each other is perpendicular, the photographing room with the light source installation place is located the both sides of the inlet pipe, the lower half pipe of inlet pipe is connected to the dust collection device, avoid dust in inlet pipe through the dust collection device and produce interference to material particle size.

Description

Technical Field

[0001] This utility model relates to the field of material particle size identification, specifically to a detection device and detection method for identifying material particle size. Background Technology

[0002] In industrial production, accurate particle size detection plays a crucial role in product quality control, process optimization, and adjustments to subsequent processing steps. For example, in industries such as ore processing and building materials processing, particle size directly affects product performance and the efficiency of subsequent processes. However, most existing detection devices employ a single light source layout, such as using only a front or rear light source. While this simple layout provides illumination to some extent, it cannot meet the imaging needs of complex materials. For instance, for materials with irregular shapes or rough surfaces, a single light source may not evenly illuminate all parts of the material, resulting in some areas being too bright and others too dark, affecting the overall image quality. Furthermore, in industrial production environments, the transportation and processing of materials generate a large amount of dust. This dust presents numerous challenges to particle size detection technology in practical applications, especially in terms of detection accuracy and efficiency in complex industrial environments. First, overexposure or insufficient contrast in the image significantly affects the accurate development of the material outline. Second, dust can adhere to the material surface and may also enter the lens and field of view of the detection device, interfering with image acquisition. These problems directly lead to a decrease in the accuracy of material particle size detection, especially for small-sized materials, where clear outlines cannot be obtained, resulting in larger errors. This insufficient detection accuracy seriously affects the optimization of the production process and the control of product quality. Utility Model Content

[0003] The purpose of this invention is to provide a novel particle size detection device that can identify the shape of materials while detecting particle size. Through optimized imaging chamber design, field of view structure layout, and light source layout, it effectively improves detection accuracy and efficiency, reduces background interference, reduces computational load, and can be modified and applied to existing equipment at low cost. Thus, it provides an efficient, reliable, and economical solution for the accurate detection of material particle size in industrial production.

[0004] This utility model provides a detection device for identifying the particle size of materials, including a feeding trough with a vibration system, a feed pipe, a photographic chamber, a light source mounting location, and a dust collection device. The feeding trough is located above the feed inlet of the feed pipe. The photographic chamber and the light source mounting location are on the same horizontal line, and this horizontal line is perpendicular to the feed pipe. The photographic chamber and the light source mounting location are located on opposite sides of the feed pipe. A dust removal pipe is connected above the photographic chamber. The lower half of the feed pipe is connected to the dust collection device, which prevents dust in the feed pipe from interfering with the particle size of the materials.

[0005] Preferably, the feed trough with vibration system includes a feed trough body, a motor located below the feed trough body, and a vibration damper supporting the feed trough body. The feed trough is mounted above the inlet of the feed pipe via a support frame.

[0006] Preferably, the photo booth includes a line scan camera located at one end.

[0007] Preferably, the light source mounting location has a built-in surface light source, which is located at the end of the light source mounting location away from the photography room.

[0008] Preferably, the surface light source is the main light source, and a strip light source is also provided around the feed pipe at the junction of the imaging chamber and the light source installation location. The strip light source is distributed in a U-shape, and the strip light source and the surface light source form a perpendicular light field, thereby improving the illumination uniformity of the camera imaging surface.

[0009] Preferably, the dust removal duct is equipped with an axial flow fan and a filter screen. The filter screen filters out dust from the environment, and the axial flow fan generates clean airflow that forms an air curtain on the camera lens surface along the duct to prevent dust from falling and contaminating the lens.

[0010] By adopting the above solution, this utility model has the following advantages and beneficial effects: It effectively improves the accuracy and efficiency of material particle size detection, enabling rapid and accurate particle size detection in complex industrial environments. It reduces the impact of background interference on the detection results, improving the stability and reliability of the detection. It achieves the identification of material shape features, providing more comprehensive material information for subsequent production processes and meeting the needs of different production scenarios. It reduces the computational load of image processing, improves the real-time performance of the detection, and meets the requirements of real-time detection in industrial production. It lowers equipment costs and the barrier to entry, enabling low-cost modification and application based on existing equipment, and has good prospects for widespread application. Through the optimized dust removal module design, it reduces dust interference with the detection while ensuring that the dust removal process does not affect the material conveying speed and position, thereby improving the accuracy and real-time performance of the detection. Attached Figure Description

[0011] Figure 1 This is a three-dimensional schematic diagram of the particle size detection device described in this utility model;

[0012] Figure 2 This is a schematic diagram of the light source arrangement of this utility model;

[0013] Figure 3 These are particle size images obtained in the photographic chamber of this utility model;

[0014] Figure 4This is a schematic diagram after contour recognition of the obtained particle size image;

[0015] Figure 5 This is a schematic diagram comparing the particle size measured by this invention with the actual particle size;

[0016] Figure 6 This is a statistical bar chart of the particle size distribution measured in this utility model.

[0017] In the diagram: 1-Feeding trough body; 2-Motor; 3-Vibration damper; 4-Feed pipe; 5-Dust removal pipe; 6-Photo booth; 61-Line scan camera; 7-Dust collection device; 8-Light source installation location; 81-Surface light source; 82-Strip light source; 9-Support frame. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] 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 utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0023] Reference manual attached Figure 1-2 A detection device for identifying the particle size of materials includes a feeding trough with a vibration system, a feed pipe 4, a photographic chamber 6, a light source mounting point 8, and a dust collection device 7. The feeding trough is located above the inlet of the feed pipe. The feeding trough with the vibration system includes a feeding trough body 1, a motor 2 located below the feeding trough body, and a vibration damper 3 supporting the feeding trough body. The feeding trough is set at the upper inlet of the feed pipe 4 by a support frame 9. The photographic chamber 6 and the light source mounting point 8 are on the same horizontal line and the horizontal line is perpendicular to the feed pipe 4. The photographic chamber 6 and the light source mounting point 8 are located on both sides of the feed pipe 4. The lower half of the feed pipe 4 is connected to the dust collection device 7, which prevents dust in the feed pipe 4 from interfering with the particle size of the materials.

[0024] The imaging chamber includes a line scan camera 61 located at one end. A surface light source 81 is built into the light source mounting location, positioned at the end of the mounting location away from the imaging chamber 6. The surface light source 81 is the main light source. At the junction of the imaging chamber 6 and the light source mounting location 8, a strip light source 82 is also provided around the feed pipe. The strip light sources 82 are arranged in a U-shape, forming a perpendicular light field with the surface light source 81, improving the illumination uniformity of the camera's imaging surface. A dust removal duct 5 is connected above the imaging chamber 6. The dust removal duct 5 contains an axial flow fan and a filter (not shown). The filter removes dust from the environment, and the axial flow fan generates clean airflow that forms an air curtain along the duct on the camera lens surface, preventing dust from falling materials from contaminating the lens.

[0025] Reference manual attached Figure 3-6 The material vibrates as it passes through the feed trough body 1, falls through the feed pipe 4, and then passes through the photographic chamber 6 to obtain an image of the material falling. (Refer to the attached instruction manual.) Figure 3-4 After acquiring specific images of the material using a line scan camera, image processing is used to identify the material's outline and calculate the aspect ratio of its minimum bounding rectangle, thereby determining the number of pixels corresponding to the material's particle size. (Refer to the instruction manual appendix.) Figure 5-6 Pixel distance calibration module: (Using materials with known particle size to calibrate the number of pixels in the width and height directions of the image, thereby obtaining the ratio between pixels and actual particle size) Then, the particle size of each material is statistically analyzed to obtain the particle size distribution information of all materials.

[0026] A detection method using the detection device for identifying material particle size as described above includes the following steps:

[0027] (1) The material is conveyed to the detection device through the feed pipe by the vibration of the feed trough body. When the material to be detected falls through the photo area of ​​the photo chamber, the material information is collected through the photo chamber. At the same time, alkaline dust is collected from the feed pipe and the camera lens in the photo chamber is dustproofed. The dustproofing is achieved by setting up a dust removal pipe above the photo chamber, filtering the dust in the environment through the filter screen in the dust removal pipe, and generating clean airflow through the axial flow fan in the dust removal pipe to form an air curtain on the surface of the camera lens to isolate the dust generated by the falling material.

[0028] (2) The material information is transmitted to a computer, which accurately acquires the outline of the high-speed moving material based on intelligent vision technology; wherein the intelligent vision technology includes the following steps:

[0029] 2.1 Convert the original image captured by the line scan camera into a grayscale image (represent each pixel in the original image using only a single channel to represent "0-255", without brightness information);

[0030] 2.2 The purpose of Gaussian blurring (or Gaussian smoothing) of the grayscale image is to remove high-frequency information in the grayscale image and improve the robustness of subsequent algorithms in the preprocessing stage.

[0031] 2.3 Image Binarization transforms a grayscale image into a single-channel image of "pure black (0) + pure white (255)". By setting a threshold, pixels larger than the threshold are designated as foreground, and pixels smaller than the threshold are designated as background (Note: the foreground is needed for subsequent image processing).

[0032] 2.4 Obtain material outline information;

[0033] 2.5 Output material profile information, including pixel values ​​in the length and width directions, to calculate the aspect ratio and particle size.

[0034] (3) Based on the obtained material outline information, the material images taken in the photo studio are blurred and binarized to obtain the minimum bounding rectangle of each material outline. Then, the particle size of each material is calculated and summarized. Finally, the particle size distribution of the material is given in the form of a bar chart. The particle size of the material is calculated by measuring the number of pixels occupied by the particle size in the image and converting it into the particle size of the measured material through the corresponding ratio of a single pixel to the particle size.

[0035] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A detection device for identifying the particle size of materials, characterized in that, The device includes a feeding trough with a vibration system, a feed pipe, a photographic chamber, a light source mounting location, and a dust collection device. The feeding trough is located above the feed inlet of the feed pipe. The photographic chamber and the light source mounting location are on the same horizontal line, which is perpendicular to the feed pipe. The photographic chamber and the light source mounting location are located on opposite sides of the feed pipe. A dust removal pipe is connected above the photographic chamber. The lower half of the feed pipe is connected to the dust collection device, which prevents dust in the feed pipe from interfering with the particle size of the material.

2. The detection device for identifying material particle size according to claim 1, characterized in that, The feeding trough with vibration system includes a feeding trough body, a motor located below the feeding trough body, and a vibration damper supporting the feeding trough body. The feeding trough is set at the upper inlet of the feed pipe by a support frame.

3. The detection device for identifying material particle size according to claim 1, characterized in that, The photo booth includes a line scan camera located at one end.

4. The detection device for identifying material particle size according to claim 1, characterized in that, The light source is installed at a location with a built-in surface light source, which is located at the end of the light source installation location away from the photography room.

5. The detection device for identifying material particle size according to claim 4, characterized in that, The surface light source is the main light source. At the junction of the imaging chamber and the light source installation location, a strip light source is also provided around the feed pipe. The strip light source is distributed in a U-shape. The strip light source and the surface light source form a perpendicular light field, which improves the illumination uniformity of the camera imaging surface.

6. The detection device for identifying material particle size according to claim 3, characterized in that, The dust removal duct is equipped with an axial flow fan and a filter screen. The filter screen filters out dust from the environment, and the axial flow fan generates clean airflow that forms an air curtain on the camera lens surface along the duct to prevent dust caused by falling materials from contaminating the lens.

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