KR20200003497A - Particle shape analysis device - Google Patents

Abstract

The present invention relates to a particle analyzing device. According to an embodiment of the present invention, the particle analyzing device comprises: a body unit; a particle supplying unit installed in the upper part of the body unit, including a moving member for moving stored powder, and supplying particles by allowing the powder to fall after being moved by the moving member; a particle distributing unit installed in the lower part of the body unit at an interval from the particle supplying unit, including a rotating member, and distributing the particles while rotating together with the rotating member after the particles fall from the particle supplying unit to the rotating member; and a particle photographing unit including an image photographing means installed in the upper part of the body unit, and photographing the particles distributed by the particle distributing unit by using the image photographing means. Therefore, the suggested particle analyzing device can facilitate analysis on particle characteristics and can accurately analyze the particle characteristics.

Description

Particle shape analysis device

TECHNICAL FIELD The present invention relates to a particle analysis device, and more particularly, to a particle analysis device for properly dispersing particles to analyze particle size, distribution, and particle shape.

In general, in the fields of molding using a press die, molding using an injection molding, and a three-dimensional printer, molding is often performed as a raw material.

As such, it is essential to measure particle size, distribution, and precise particle shape in a powder-based production process. Analysis of these particle characteristics is used as important analytical information to determine the physical, chemical and mechanical properties of the final material.

Korean Patent No. 10-1363370 has been disclosed as a form of a measuring device for analyzing the characteristics of particles such as particle size, distribution and shape. The prior art proposes a raw light particle size reading device and a reading method capable of measuring in real time the individual particle size of raw light being transported by a belt conveyor by image pattern analysis.

However, in order to accurately measure the size, distribution and shape of the particles, the particles need to be evenly distributed in the plane. This is particularly important for small particles whose particle size is 100 μm or less. The prior art does not suggest a technique for dispersing particles, but only a method for analyzing photographed particles, so that accurate analysis is difficult when a large number of particles are collected.

Republic of Korea Patent No. 10-1363370 (2014.02.10.)

The present invention provides a particle analysis apparatus that allows particles to be evenly dispersed, thereby facilitating analysis of particle characteristics such as particle size, distribution, and shape, and accurately analyzing particle characteristics.

Other detailed objects of the present invention will be apparently understood and understood by those skilled in the art through the following detailed description.

In order to solve the above problems, the present invention is an embodiment for analyzing the particles, the body portion, which is provided on the upper portion of the body portion, provided with a moving member for moving the stored powder, the powder by the moving member A particle supply unit for supplying particles by dropping the particles after being moved, and installed at a lower portion of the body part while being spaced apart from the particle supply unit, and having a rotating member rotating therein, wherein particles dropped from the particle supply unit are dropped onto the rotating member. And a particle photographing unit having a particle dispersing unit in which particles are dispersed while rotating together with the rotating member, and an image photographing means installed on an upper portion of the body part, and photographing particles dispersed by the particle dispersing unit by the image photographing means. A particle analysis apparatus is described.

Here, the particle supply unit is installed through the hopper and the powder storage space of the hopper is formed a space for storing the powder, the screw to move the powder to the screw groove by rotation to discharge and fall to the outside of the hopper It may include.

In addition, the screw of the particle supply portion and the rotating member of the particle dispersing portion is made to be able to adjust the speed of rotation and can be made to adjust the amount of dispersion of the particles by adjusting the speed of the screw and the rotating member.

Meanwhile, all or part of the hopper may be made transparent so that the amount of powder stored in the hopper may be known.

Here, the particle photographing unit includes a camera for acquiring an image of the particle and an LED light disposed under the camera to illuminate the particles, and illuminates the back side of the particle through the LED illumination of the lower part of the camera to display a black image. It may be a structure for extracting.

On the other hand, the particle photographing unit includes a moving means capable of vertically moving the camera, and when the camera is not in focus, acquires a plurality of images through the vertical movement of the camera, The location can be identified and the characteristics of the particles can be analyzed with the image acquired at the location of the focal point.

The particle analysis device may further include a particle analyzer that analyzes characteristics of particles photographed by the particle photographing unit, and the particle analyzer includes accurate particle analysis through separation of superimposed powder images using an image separation algorithm. You can do that.

According to an embodiment of the present invention, since the size, shape, etc. of the particles can be measured after the particles are evenly dispersed, there is an effect of accurately analyzing the characteristics of the particles.

In addition, since the particles can be analyzed by a simple method without additional processing, the particles can be sampled during the production and use of powder raw materials to analyze the characteristics of the particles, and the time required to analyze the characteristics of the particles can be shortened. It can respond quickly to changes in particle size.

In addition, through image processing, it is possible to monitor whether the raw material size corresponds to the desired size, thereby producing high-quality sintered ore, improving productivity, and reducing the burden on the worker.

Other effects of the present invention will be apparent to and understood by those skilled in the art through the following detailed description or in the course of carrying out the present invention.

1 is a perspective view of a particle analysis device according to an embodiment of the present invention.
2 is an exploded perspective view of the particle analysis device of FIG.
3 is a view conceptually showing that the particles are dispersed and photographed in the particle analysis device of FIG. 1.
Figure 4 is a flow chart illustrating a process of extracting the shape of the particles in the particle analyzer.
5 is a diagram illustrating an example of data processed by a particle analyzer;
6 is a flow chart showing the operation of the particle analysis device of FIG.
7 is a view showing an image of particles photographed using the particle analysis device of FIG.

The above-described features and effects of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, and thus, those skilled in the art to which the present invention pertains may easily implement the technical idea of the present invention. Could be. As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosure, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Hereinafter, a particle analyzing apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. In the present specification, the same reference numerals are used to designate similar components in different embodiments, and the description thereof is replaced with the first description.

In general, a microscope is often used to measure the properties of powder particles. In this case, the powder is placed on the slide glass of the microscope and measured using a powder measuring program. In order to measure the shape and size of the powder, the powder must be dispersed without overlapping, but it is not easy to evenly distribute the powder of about 50㎛ on the slide glass.

In addition, the visible area of the microscope is about 1mm when using an objective lens with a 10x optical magnification, and the number of visible particles is about 50. Since the number of visible particles is limited, it is necessary to increase the amount of sampling data in order to increase the accuracy of the measurement. In addition, to do this, it is necessary to look at various areas, which is not easy.

For example, the iron-based powder has a particle size of about 40 μm in diameter, and the number of powders contained in 1 kg is about 3.7 billion. Increasing the sampling data is a difficult task because only 50 particles can be seen at a time of these 3.7 billion powders.

The present invention provides a particle analysis device that can quickly and accurately measure the properties of the particles by applying a measurement process while increasing the dispersion of the powder having a particle size of several tens of micrometers in the process of measuring the properties of the powder particles To present.

The particle analysis device 100 according to the embodiment of the present invention is an apparatus for analyzing the size, distribution, and shape of the powder particles P, and includes a body part 1, a particle supply part 2, and a particle dispersion part 3. ) And a particle photographing unit 4.

The body portion 1 is a skeleton in which the respective components constituting the particle analysis device 100 are installed. The upper part of the body part 1 is provided with the components of the particle supply part 2 and the particle photographing part 4, and the lower part of the body part 1 is provided with the components of the particle dispersing part 3.

The particle supply part 2 has a moving member for moving the stored powder, and supplies the particles to the particle dispersing part 3 by dropping the powder dispersing part 3 after the powder is moved by the moving member.

The particle dispersing part 3 includes a rotating member 31 spaced apart from the particle supply part 2 and installed below the particle supply part 2, and particles falling from the particle supply part 2 are transferred to the rotating member 31. After laying, the particles are dispersed while rotating with the rotating member 31.

As the rotating member 31 rotates, the particles placed on the rotating member 31 are moved, and a portion of the rotating member 31 where no particles are placed is placed under the particle supply part 2 so that the particles are rotated. It is distributed evenly while forming an arc shape without accumulating in one place of (31).

The particle photographing unit 4 includes an image photographing means installed on the upper portion of the body part 1, and photographs particles dispersed and dispersed in the particle dispersing unit 3 by using the image photographing means. The image information obtained by photographing is used to analyze the size, distribution and shape of the powder particles P.

The particle analysis apparatus 100 as described above is supplied to the particle dispersing portion 3 in a manner that the particles fall, and after the particles are placed in the particle dispersing portion 3, the particles can be rotated and moved to make the particles more widely dispersed and dispersed. It is possible to photograph particles with high degrees of intensity, allowing for more accurate characterization of the particles.

Hereinafter, the structure of each part is demonstrated in detail with reference to drawings.

1 is a perspective view of a particle analysis device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the particle analysis device of FIG. 1, and FIG. 3 is a conceptual diagram showing that particles are dispersed and photographed in the particle analysis device of FIG. 1. It is a figure shown.

The body part 1 is equipped with respective components of the particle analyzer 100, and includes a vertical plate 11, a horizontal plate 12, and a casing 13. Referring to the drawings, the horizontal plate 12 is coupled to the upper portion of the vertical plate 11 which is arranged upright, the particle supply unit 2 is installed on one side of the horizontal plate 12 and the particle photographing unit 4 on the other side. Is installed.

At the position where the particle photographing unit 4 is installed, a hole 121 for photographing the particle by the image photographing means is formed. The hole 121 is preferably formed as a long hole to one side so as to correspond to the movement of the image pickup means.

The particle supply part 2 is installed at a suitable position so that the falling particles can fall on the rotating member 31 of the particle dispersing part 3, and the particle photographing part 4 is also dropped to rotate the rotating member of the particle dispersing part 3. Particles placed on (31) are installed at appropriate positions so that the images can be accurately photographed.

On the other hand, the casing 13 is installed in the lower part of the particle analysis device 100, the driver 32 for rotating the rotating member 31 is mounted inside the casing (13). The rotating shaft 321 of the driver 32 is installed to protrude out of the casing 13 and the rotating member 31 is coupled to the rotating shaft 321 to rotate.

The driver 32 may employ a server motor capable of adjusting the speed, and various gears and reducers may be interposed between the driver 32 and the rotary shaft 321.

The particle supply unit 2 is configured to supply the powder particles P to the particle dispersing unit 3 while being dispersed, and includes a hopper 21 and a screw 22, and a driver 23 for rotating the screw 22. ) Is provided.

The hopper 21 is formed with a space for storing the powder, and the powder is put and stored in this space. Referring to the drawings, the hopper 21 has an inclined surface inside and a receptor 211 having a c-shaped cross section and a shielding plate 212 for blocking one open side of the receptor 211 are formed. The shielding plate 212 is coupled to the receiver 211 by the binding member 213 to facilitate disassembly and assembly, and the hopper 21 may be conveniently cleaned, maintained, and repaired.

Meanwhile, all or part of the hopper 21 may be made transparent so that the amount of powder stored in the hopper 21 may be confirmed. For example, the shielding plate 212 can be made transparent so that the amount of powder in the hopper 21 can be confirmed.

The screw 22 is installed through the powder storage space of the hopper 21. As the screw 22 rotates, the powder may move along the screw groove formed in the screw 22. The moved powder is discharged and dropped out of the hopper 21 at the point where the screw 22 penetrates the hopper 21.

Referring to the drawings, the bracket 24 is installed on one side of the horizontal plate 12 of the body 1. The driver 23 is installed to the bracket 24 so that the hopper 21 is installed toward the front of the driver. In this case, the length of the horizontal plate 12 may be appropriately selected so that the hopper 21 may be installed at an appropriate position, and thus the powder discharged from the hopper 21 may be dropped at an appropriate position of the rotating member 31. have. On the other hand, if another plate member (not shown) is installed on the horizontal plate and the hopper 21 is installed on the plate member, the hopper 21 can be installed at an appropriate position by modifying the length or shape of the plate member.

The screw 22 is coupled to the rotating shaft of the driver 23. The screw 22 is disposed to extend so as to sequentially penetrate through the receiver 211 and the shield plate 212 of the hopper 21 and protrude from the shield plate 212.

In order to increase the dispersion degree of the particles, the particle supply unit 2 needs to supply the powder particles P so as to spread in small amounts in a wide range. As described above, when the screw 22 is employed as the moving member, and the screw 22 is operated after being coupled to penetrate through the powder storage space of the hopper 21, a small amount of particles may be supplied.

Particles are discharged and dropped into the gap formed between the valley of the screw 22 and the screen plate 212, and is divided into both left and right sides of the screw 22 on the valley formed on the screw 22, respectively. The size of the screw 22 is not limited, but in order to move the fine powder, a diameter of about 6 mm and a pitch of 1 to 2 mm are appropriate.

Particle dispersing portion (3) is a configuration that allows the dispersed powder particles (P) to be seated and to prevent the particles to be dispersed while rotating the movement of the unsecured particles are accumulated Rotating member 31 and the driver 32 for rotating it.

Referring to the drawings, the rotating member 31 has a disk-like shape that has a low frictional force to facilitate the dispersion of the particles and has a white-based color so that the particles and the shadow of the particles can be clearly detected. For example, a white plate with an acrylic material can be used.

Rotating member 31 is preferably installed spaced apart 30 ~ 50mm from the hopper 21, it is preferable that the diameter of the rotating member 31 is about 150mm.

Particles falling continuously and in small amounts from the hopper 21 by the screw 22 are primarily dispersed by the resistance of the air. At this time, the higher the falling height, the greater the effect of dispersion through the resistance of the air.

However, the greater the distance between the hopper 21 and the rotary member 31, the larger the size of the device is 30 ~ 50mm height is appropriate. The powder particles P dispersed in this way are dispersed in a circular line having a diameter of about 140 mm to the lower rotating member 31, and the width of the circular line is preferably about 10 mm.

The driver 32 is disposed inside the casing 13 and the rotating shaft 321 of the driver 32 is formed to protrude from the casing 13. As described above, the driver 32 may employ a server motor capable of adjusting the speed, and various gears and reducers may be interposed between the driver 32 and the rotary shaft 321.

Dispersion amount of particles by adjusting the rotational speed of the screw 22 and the rotating member 31 when the rotational speed of the screw 22 of the particle supply unit 2 and the rotating member 31 of the particle dispersion unit 3 is adjustable. It is possible to adjust.

Since the dispersion amount can be adjusted in this way, it is possible to find a dispersion degree suitable for a particular particle, and in the case of analyzing the characteristics of various particles, the dispersion degree can be adjusted.

On the other hand, the rotating member may disperse the particles while rotating several times. Even if the same amount of particles are measured, the rotating member rotates several times while dropping a small amount of powder from the screw. The degree of dispersion can be made larger.

In the static particle analysis device using the camera 41, dispersion of particles is very important. This is because the particles can be distinguished only when they are dispersed to see the cross section of the particles evenly.

For example, the metal powder used in the metal three-dimensional printer has a size of 10 to 150 µm. It is not easy to disperse these small powders dry.

As described above, in the present invention, the powder particles P are continuously finely supplied through the rotation of the fine screw 22, while the particles fall down a predetermined distance to be seated on the rotating member 31, thereby reducing the resistance of the air. This allows for natural dispersion of the particles.

In addition, since additional dispersion is made in the rotating member 31 by the force generated according to the rotational movement of the rotating member 31, the fine powder can be properly dispersed through two dispersions.

The particle photographing unit 4 is a configuration for photographing particles placed on the particle dispersing unit 3 and includes a camera 41 and an illumination module 42.

The camera 41 acquires an image of the particle by photographing. At this time, the camera 41 used is about 20 times the optical magnification and the distance that can be seen on one screen may be about 0.6mm. Also, the distance seen per pixel of the camera 41 may be about 0.3 μm.

In addition, the camera 41 may be configured to be movable in the width direction in which the powder particles (P) is dispersed. Referring to the drawings, the camera 41 is made to move back and forth (y-axis direction in the drawing) of the particle analyzer 100 according to the operation of the linear motor 43. As the camera 41 moves and photographs, the amount of data measured may be increased. In addition, even when the position of the camera 41 is moved, it is possible to accurately photograph the particles through the hole 121 formed in the horizontal plate 12.

As described above, for example, the powder of iron (Fe) -based powder is composed of about 3.7 billion pieces of powder having a diameter of 40 μm contained in 1 kg. For accurate measurements, it is necessary to increase the amount of sampling data to be measured.

If the width of the powder particles (P) dispersed on the rotating member 31 is 10mm, and the area that can be seen at once is 0.5mm, the direction of the width of the particles dispersed after the rotation member 31 is measured during one rotation By moving the camera 41 and then re-measuring in the same way, the measured sampling data can be increased.

Accordingly, a large amount of particle photographing data can be obtained and it is suitable for quickly analyzing particle size and shape through image analysis of photographed data.

The lighting module 42 is disposed under the camera 41 and shines the particles with light so that an accurate image of the particles is obtained.

In the present embodiment, the lighting module 42 is mounted on the upper surface of the casing 13. When the rotating member 31 is a translucent (particularly white) material, when the illumination module 42 illuminates the rear surface of the rotating member 31 on which the powder particles P are placed, the appearance of the particles can be accurately photographed. In addition, by condensing lens (not shown) in front of the LED can be improved the efficiency of the illumination.

Specifically, the particles may be measured by a white field imaging method in which the particles are expressed in black when the surroundings are made of white. This approach is an advantageous optical illumination scheme for separating particles in an image processing algorithm. To this end, a back light as described above is used. Lighting is preferably made of LED (LED) to enable a long time driving. Powder particles (P) for the diffusion of illumination has a structure arranged on the acrylic diffusion plate and the rotating member 31 functions as a diffusion plate.

In the case of measuring particles having a size of 15 to 50 μm, the magnification of the objective lens provided in the particle photographing unit 4 is about 10 to 20 times.

When the magnification of the objective lens is 20 times, the depth of focus is about 20 μm. This causes some particles not to see the whole particle at the same focal point. In addition, because the rotating member is rotated for a number of measurements, it is difficult to form a constant focus all the time.

Therefore, there is a need for a method for accurately focusing in response to various cases. To this end, in the present embodiment, the particle photographing unit 4 may move up and down using the linear motor 44.

For example, when the rotating member 31 is rotated so that the measurement area is moved (about 0.5 mm), the camera photographs an image and determines whether the captured image is in focus. In this case, if it is determined that the focus is out of focus, the correct focus position is found through the upper and lower movements of the linear motor 44.

Specifically, the particle photographing unit 4 may be first moved by 20 µm units to the upper part, and then moved by 20 µm units to the lower part, and the measurement may be performed at the position after finding the optimal focus position.

In this case, whether the focus corresponds to an appropriate value may be determined by measuring an image frequency and sharpness of the captured image. Since a method of determining focus based on the image frequency and the sharpness of the image is well known, a detailed description thereof will be omitted.

Determining whether to focus may be performed in a focus judging unit (not shown) configured separately, and the focus judging unit may be provided in the particle photographing unit 4 or the particle analyzing unit 5.

On the other hand, the linear motor 44 may be provided with a ball screw and a stepping motor, the lead of the ball screw is preferably about 2mm and the stepping motor has a resolution of about 5㎛.

On the other hand, the particle analysis device 100 may further include a particle analysis unit 5 for analyzing the characteristics of the particles photographed by the particle imaging unit (4).

The particle analysis unit 5 is a structure that extracts a black image from an image obtained by illuminating the back side of the powder through the LED illumination at the bottom of the camera 41 in the particle imaging unit 4, and performs an image separation algorithm. This allows for accurate particle analysis through separation of superimposed powder images.

4 is a flowchart illustrating an example of a process of extracting a shape of particles from a particle analyzer.

In the drawings, the case where the particles are light in color and the portion where the particles are placed is described as a dark index. However, the same description may be applied to the case where the particles are dark as color and the portion where the particles are placed.

First, when a color image is photographed, when a color image is input (S1), the color image is converted into a black and white image (S2), the conversion is performed, and the black and white image is binarized to emphasize the difference in brightness (S3). Next, while extracting the inner contour of the powder (S4) while extracting the outer contour of the powder (S5) and then combining them (S6) through the process of classifying the particles by the particle shape (S7). Subsequently, particle analysis is performed using the measured powder form (S8).

When performing the process of classifying the inputted particle image by particles, a watershed algorithm may be used as one of methods. The watershed algorithm is an algorithm that performs object segmentation by considering an edge corresponding to an edge of an input image as "ridge" and considering a uniform area without a feature as "valley".

Although the watershed algorithm is a well-known technique, the process of applying the separation to the particles of the image according to the present embodiment will be described briefly. First, the gradient of the image is obtained. This process results in "valleys" or "pools" (low points) in flat, untextured areas, and "mountains" or "mountains" (high points) where edges in the image stand out. In this gradient image, the water starts to fill at the points set by the user or the points set by the algorithm and stops when other areas meet. The regions connected by the markers merge into one powder particle region as it is filled with water. In this way, separation of particles in the superimposed image is realized.

FIG. 5 is a diagram illustrating an example of data processed by a particle analyzer. FIG. 5A illustrates data converted into a black and white image, FIG. 5B illustrates data obtained by binarizing a black and white image, and FIG. 5C illustrates data extracted from powder internal contours. FIG. 5D illustrates data obtained by extracting the powder outer contour, and FIG. 5F illustrates data classified for each particle by the watershed algorithm. 5E is a diagram illustrating the concept of a watershed algorithm.

Hereinafter, the operation of the particle analysis device according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 6 is a flowchart illustrating an operation process of the particle analysis device of FIG. 1.

First, power is supplied to the particle analyzer 100 (S10), and it is checked whether the analysis is in a normal state (S20). If there is a problem with the particle analyzer 100 itself, an alarm may be displayed.

Next, the powder to be measured is introduced into the hopper 21 and the analysis conditions such as the measurement time, the rotation speed of the screw 22 and the rotating member 31 are set (S30). Check whether there is a problem in the initial work environment including the set analysis condition (S40) and if there is a problem in the initial work environment such as setting the analysis condition, an alarm may be displayed.

Next, when the operation is started in this state, the screw 22 is rotated to drop the powder to the rotating member (31). Meanwhile, the rotating member 31 is rotated together with the rotation of the screw 22. When the screw 22 is operated to rotate the powder while the rotating member 31 is rotated one time, the powder may be dispersed in the circumferential shape without the powder being laminated (S50). After the dispersion of the powder is completed, the driver 23 for driving the screw 22 and the driver 32 for rotating the rotating member 31 are stopped. At this time, the driver 23 for rotating the rotary member 31 in the state in which the driver 23 for driving the screw 22 is stopped may be further operated to further increase the dispersion of the powder.

It is also possible to adjust the dispersion of the particles for effective dispersion of the powder. This can be achieved through the control of the rotational speed of the screw 22 and the rotational speed of the rotating member 31. For example, when the screw 22 rotates rapidly, a large amount of powder falls, so that the density of powder gathering increases and the degree of dispersion decreases. On the other hand, if the speed of the rotating member 31 is increased, the amount of powder particles P accumulated can be reduced, so that the density of powder gathering is low and the degree of dispersion is high.

Thereafter, for the measurement of the camera 41, the dispersed particles are rotated at a distance within 0.5 mm from the bottom of the camera 41, and then photographed with the camera 41. The image of the particles photographed as described above is illustrated in FIG. 7. After that, the image of the photographed particles is analyzed through an analysis algorithm such as a watershed (WaterShed) (S60). Repeat this analysis and continue. When the diameter of the circumference formed by the powder is 140mm, when the rotating member 31 is rotated to move by 0.5mm, an image of about 850 images may be obtained. Accordingly, the sampling amount of the powder image can be increased and the reliability of the measurement data can be improved.

The camera can acquire a particle image by shooting after a certain time after the screw of the particle supply part and the rotating member of the particle dispersing part is operated. The presence of particles in the interior can be confirmed.

This process may be performed for a predetermined time, and when a predetermined time elapses (S70), the operation may be completed and analysis data may be displayed (S80).

As described above, the particle analysis apparatus may not be limitedly applied to the configuration and method of the above-described embodiments, but the embodiments may be configured by selectively combining all or some of the embodiments so that various modifications can be made. have.

Although the above description of the present invention has been described with reference to a preferred embodiment of the present invention, those skilled in the art or those skilled in the art will have the idea of the present invention described in the claims to be described later. It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

1: Body
11 vertical plate 12 horizontal plate 121 hole 13 casing
2: Particle supply part
21 Hopper 211 Receptor 212 Screening plate 213 Binding member
22 screw 23 actuator 24 bracket
3: particle dispersing unit
31: rotating member 32: driver 321: rotating shaft
4: Particle recording unit
41: camera 42: lighting module 43, 44: linear motor
5: particle analysis
100: particle analysis device P: powder particles

Claims (7)

An apparatus for analyzing particles,
Body Part,
A particle supply part installed on an upper portion of the body part and having a moving member for moving the stored powder, and supplying particles by dropping the powder after the powder is moved by the moving member;
It is installed in the lower portion of the body spaced apart from the particle supply portion, and provided with a rotating member, the particles dispersed from the particle supply portion is dispersed in the particle while rotating with the rotating member after falling to the rotating member Wealth and
A particle photographing unit having an image photographing means installed on an upper portion of the body part and photographing particles dispersed by the particle dispersing unit by the image photographing means;
Particle analysis device comprising a. The method of claim 1,
The particle supply unit,
A hopper in which a space for storing the powder is formed, and
The screw is installed to penetrate through the powder storage space of the hopper, and the powder is moved to the screw groove by rotation to discharge and fall out of the hopper.
Particle analysis device comprising a The method of claim 2,
And said screw and said rotating member of said particle supply part are made to control the speed of rotation and to control the amount of dispersion of said particles by adjusting the speed of said screw and said rotating member. The method of claim 2,
Part or all of the hopper is made of a transparent particle analysis device to know the amount of powder stored in the hopper. The method of claim 1,
The particle photographing unit,
A camera for acquiring an image of the particle;
LED illumination disposed under the camera and illuminating the particles
Including,
It is a structure that extracts a black image by illuminating the back of the particles through the LED illumination of the lower part of the camera
Particle Analysis Device. The method of claim 1,
The particle photographing unit,
It is provided with a moving means capable of vertical movement of the camera,
When the camera is out of focus, a plurality of images are acquired through vertical movement of the camera, the position of the focus is determined from the acquired plurality of images, and the characteristics of the particles are analyzed by the image acquired at the position of the focus. doing
Particle Analysis Device. The method according to any one of claims 1 to 6,
Further comprising a particle analysis unit for analyzing the characteristics of the particles taken by the particle imaging unit,
The particle analysis unit, the particle analysis device capable of accurate particle analysis through the separation of the superimposed powder image using an image separation algorithm.

Images