KR102128110B1 - Particle shape analysis device - Google Patents

Abstract

The present invention relates to a particle analysis device. The present invention is an embodiment, the body portion, is provided on the upper portion of the body portion, and has a moving member for moving the stored powder, the particle supply unit for supplying particles by causing the powder to be moved and then dropped by the moving member, the Particle dispersion unit spaced apart from the particle supply unit, installed at a lower portion of the body, provided with a rotating rotating member, and particles are dispersed while rotating together with the rotating member after particles dropped from the particle supply unit drop onto the rotating member And a particle photographing unit having an image photographing unit installed on an upper portion of the body and photographing particles dispersed by the particle scattering unit as the image photographing unit.

Description

Particle shape analysis device

The present invention relates to a particle analysis device, and more particularly, to a particle analysis device that analyzes the particle size, distribution, and particle shape by properly dispersing the particles.

In general, in the fields of molding using a press mold, molding using injection, and a three-dimensional printer, powder is often molded as a raw material.

As described above, in the production process using powder as a raw material, measurement of particle size, distribution, and accurate particle shape is essential. Analysis of these particle properties is used as important analytical information to understand the physical, chemical and mechanical properties of the final material.

Korean Patent Registration No. 10-1363370 is disclosed as a form of measurement device that analyzes characteristics of particles such as particle size, distribution, and shape. The prior art proposes a raw material particle size reading device and a reading method capable of real-time measuring the individual particle size of raw light being transported by a belt conveyor by means of image pattern analysis.

However, in order to accurately measure the size, distribution and shape of the particles, it is necessary for the particles to be evenly distributed in a plane. This is especially important for small particles with a particle size of 100 μm or less. In the prior art, the technique for dispersing particles is not presented, but only the method for analyzing the captured particles is presented, so accurate analysis is difficult when a large number of particles are gathered.

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

The present invention proposes a particle analysis device that enables particles to be uniformly dispersed, thereby easily analyzing particle characteristics such as particle size, distribution, and shape, and accurately analyzing particle characteristics.

Other detailed objects of the present invention will be clearly understood and understood by experts or researchers in this technical field through specific contents described below.

In order to solve the above problems, the present invention is an embodiment, as a device for analyzing particles, is provided on the upper portion of the body portion, the body portion, and having a moving member for moving the stored powder, the powder by the moving member Particle supply unit for supplying particles by allowing them to fall after being moved, separated from the particle supply unit, installed at a lower portion of the body, and provided with a rotating rotating member, and particles dropped from the particle supply unit are dropped on the rotating member Afterwards, a particle dispersion unit for dispersing particles while rotating together with the rotating member and an imaging unit installed on the upper portion of the body unit, and a particle imaging unit for capturing particles dispersed by the particle dispersion unit as the imaging unit Presents a particle analysis device.

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

In addition, the screw of the particle supply unit and the rotating member of the particle dispersing unit can be made to be able to control the rotational speed, and can be made to control the amount of dispersion of the particles by controlling 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 can be known.

Here, the particle photographing unit includes a camera for acquiring an image of the particle and an LED light disposed on the lower portion of the camera and illuminating the particle, and illuminating the back side of the particle through the LED light at the bottom of the camera to obtain a black image. It may be a structure for extracting.

On the other hand, the particle photographing unit includes moving means capable of moving the camera up and down, and when the camera is out of focus, acquires a plurality of images through the up and down movement of the camera, and focuses from the acquired plurality of images. By grasping the position, it is possible to analyze the characteristics of the particles with the image acquired at the position of the corresponding focus.

The particle analysis device further includes a particle analysis unit that analyzes the characteristics of the particles photographed by the particle photographing unit, and the particle analysis unit performs accurate particle analysis through separation of superimposed powder images using an image separation algorithm. It can be enabled.

According to the embodiment of the present invention, since the particle size and shape can be measured after the particles are evenly dispersed, it is possible to accurately analyze the characteristics of the particles.

In addition, since particles can be analyzed in a simple way without separate treatment, samples can be analyzed 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 is shortened. Can quickly respond to changes in particle size.

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

Other effects of the present invention will be clearly understood and understood by experts or researchers in this technical field through specific contents described below or during the process of carrying out the present invention.

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

The above-described features and effects of the present invention will become more apparent through the following detailed description in connection with the accompanying drawings, and accordingly, those skilled in the art to which the present invention pertains can easily implement the technical spirit of the present invention. Will be able to. The present invention can be applied to various changes and may have various forms, and specific embodiments will be illustrated in the drawings and described in detail in the text. However, it is not intended to limit the present invention to a specific disclosure form, it should be understood to include all modifications, equivalents, or substitutes included in the spirit and scope of the present invention. Terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention.

Hereinafter, a particle analysis 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 similar reference numerals are assigned to the similar configurations in different embodiments, and the description 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 measurement program. In order to measure the shape and size of the powder, the powder must be dispersed so as not to overlap, but it is not easy to evenly distribute powder having a diameter of about 50 µm on the slide glass.

Also, the area visible in the microscope is about 1 mm when using an objective lens having an optical magnification of 10 times, and the number of visible particles is about 50. Since the number of visible particles is limited as described above, it is necessary to increase the amount of sampling data in order to increase the accuracy of the measurement. Also, to do this, you need to look at several areas, which is also not easy.

For example, iron (Fe)-based powders have a particle size of about 40 μm in diameter, and the number of powders contained in 1 kg is about 3.7 billion. Since the number of particles that can be seen at a time among these 3.7 billion powders is only 50, it is difficult to increase the sampling data.

The present invention provides a particle analysis device capable of quickly and accurately measuring the properties of particles by applying a measurement process suitable for this while increasing the dispersion degree of powder having a particle size of several tens of µm in the process of measuring the properties of powder particles. Is to present.

Particle analysis device 100 according to an embodiment of the present invention, as a device for analyzing the size, distribution and shape of the powder particles (P), the body portion (1), the particle supply unit (2), the particle dispersion unit (3 ) And particle photographing unit 4.

The body part 1 is a skeleton in which each component constituting the particle analysis device 100 is installed. The components of the particle supply unit 2 and the particle photographing unit 4 are installed on the upper portion of the body portion 1, and the components of the particle dispersion unit 3 are installed on the lower portion of the body portion 1.

The particle supply unit 2 includes a moving member for moving the stored powder, and supplies particles to the particle dispersion unit 3 by allowing the powder to be dropped by the moving member and then dropped on the particle dispersion unit 3.

The particle dispersion unit 3 is provided with a rotating member 31 spaced apart from the particle supply unit 2 and installed at a lower portion of the particle supply unit 2, and particles dropped from the particle supply unit 2 are provided to the rotating member 31. After being placed, the particles are dispersed while rotating together with the rotating member 31.

As the rotating member 31 rotates, the particles placed on the rotating member 31 are shifted in position, and the part where the particles are not placed on the rotating member 31 is placed under the particle supplying part 2 so that the particles are rotated. It does not accumulate in one place of (31) and is evenly distributed while forming an arc shape.

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

As described above, the particle analysis device 100 is supplied to the particle dispersion unit 3 in a manner in which particles are dropped, and the particles are placed on the particle dispersion unit 3 and then rotated to move, thereby allowing particles to be dispersed more widely and dispersed It is possible to photograph particles with a high degree, so that the characteristics of the particles can be analyzed more accurately.

Hereinafter, the configuration of each part will be described in detail with reference to the 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 in which particles are dispersed and photographed in the particle analysis device of FIG. It is shown in the figure.

The body part 1 is equipped with each component of the particle analysis device 100, and includes a vertical plate 11, a horizontal plate 12, and a casing 13. Referring to the drawing, the horizontal plate 12 is coupled to the upper portion of the vertical plate 11 which is placed upright, the particle supply unit 2 is installed on one side of the horizontal plate 12, and the particle photographing unit 4 is provided on the other side. Is installed.

At the position where the particle photographing unit 4 is installed, a hole 121 is formed for the image photographing means to photograph the particles. The hole 121 is preferably formed as a long hole on one side to be able to cope with the movement of the image taking means.

The particle supply unit 2 is installed at an appropriate position so that falling particles can fall on the rotating member 31 of the particle dispersion unit 3, and the particle photographing unit 4 also falls, so that the rotating member of the particle dispersion unit 3 The particles placed in (31) are installed in appropriate positions so that they can be accurately photographed.

On the other hand, the casing 13 is installed in the lower portion of the particle analysis device 100, the actuator 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 outward 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 speed adjustment, and various gears or reducers may be interposed between the driver 32 and the rotating shaft 321.

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

In the hopper 21, a space for storing powder is formed, and powder is put in and stored in this space. Referring to the drawing, the hopper 21 is made of a receptor 211 having an inclined surface inside and having a U-shaped cross section, and a blanking plate 212 blocking one open side of the receptor 211. The cover plate 212 is easily disassembled and assembled by being coupled to the receptor 211 by the binding member 213, and cleaning, maintenance, and repair of the hopper 21 can be conveniently performed.

On the other hand, all or part of the hopper 21 may be made to be transparent so as to check the amount of powder stored in the hopper 21. For example, the cover plate 212 can be configured to be able to confirm the amount of powder inside the hopper 21 by making it transparent.

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

Referring to the drawing, a bracket 24 is installed on one side of the horizontal plate 12 of the body 1. The driver 23 is fixed to the bracket 24 and a hopper 21 is installed toward the front of the driver. At this time, the length of the horizontal plate 12 can be properly selected so that the hopper 21 can be installed at an appropriate location, and accordingly, the powder discharged from the hopper 21 can be dropped at an appropriate location 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 length or shape of the plate member can be modified to install the hopper 21 at an appropriate position.

A screw 22 is coupled to the rotating shaft of the driver 23. The screw 22 is extended so as to penetrate the receptor 211 of the hopper 21 and the blanking plate 212 in turn and protrude from the blanking plate 212.

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

The particles are discharged and dropped into the gap formed between the bone of the screw 22 and the shielding plate 212. The bone formed in the screw 22 is divided into both left and right sides of the screw 22, and is dropped. The size of the screw 22 is not limited, but in order to move the fine powder, it is appropriate that the diameter is about 6 mm and the pitch is 1 to 2 mm.

The particle dispersing unit 3 is a structure that prevents the powdered particles P from falling and accumulates by rotating the stabilized particles, while simultaneously dispersing the particles. It includes a rotating member 31 and a driver 32 for rotating it.

Referring to the drawings, the rotating member 31 is a disk shape, it is preferable to have a color of a white series in order to make it easy to disperse the particles and to have a low friction force while the particles and the shadow of the particles are clearly detected. For example, a white plate having an acrylic-based material may be used.

The rotating member 31 is preferably installed 30 to 50 mm apart from the hopper 21, and the diameter of the rotating member 31 is preferably about 150 mm.

Particles that are continuous and fall in small quantities 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 air resistance.

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

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

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

Since the dispersion amount can be adjusted as described above, a dispersion degree suitable for a specific particle can be found, and when analyzing characteristics of various particles, a dispersion degree can be adjusted to respond.

On the other hand, the rotating member may disperse the particles while rotating several times, or even if the same amount of particles are measured, if the screw rotates several times while dropping a small amount of powder, the rotating member rotates several times to settle and set the particles. The degree of dispersion can be further increased.

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 the dispersion can be seen evenly.

For example, a metal powder used in a metal 3D printer has a size of 10 to 150 μm. It is not easy to disperse such a small powder dry.

As described above, in the present invention, the powder particles P are continuously and finely supplied through the rotation of the fine screw 22, while the particles fall on a certain distance and settle on the rotating member 31. The natural dispersion of particles is thereby achieved.

In addition, since the 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 appropriately dispersed through two dispersions.

The particle photographing unit 4 is configured to photograph particles placed on the particle dispersion unit 3, and includes a camera 41 and an illumination module 42.

The camera 41 acquires an image of particles by photographing. The camera 41 used at this time may be about 20 times at an optical magnification, and the distance visible on one screen may be about 0.6 mm. In addition, the distance seen per pixel of the camera 41 may be around 0.3㎛.

In addition, the camera 41 may be made to be movable in the width direction in which the powder particles P are dispersed. Referring to the drawings, the camera 41 is made to move in the front and rear (in the y-axis direction of the drawing) of the particle analysis device 100 according to the operation of the linear motor 43. As the camera 41 is moved and photographed, the amount of measured data can be increased. In addition, even if the position of the camera 41 is moved, it is possible to accurately photograph particles through the hole 121 formed in the horizontal plate 12.

As described above, for example, the number of iron (Fe)-based powders is about 370 billion pieces of 40 µm-diameter powders contained in 1 kg. For accurate measurement, 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 10 mm, and the area visible at a time is 0.5 mm, the direction of the width in which the particles are dispersed after being measured during the rotation of the rotating member 31 is 1 mm. If the camera 41 is moved and re-measured in the same way, the measured sampling data can be increased.

Accordingly, a large amount of particle imaging data can be obtained, and it is suitable to quickly analyze particle size, shape, etc. through image analysis of the captured data.

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

In this embodiment, the lighting module 42 is mounted on the upper surface of the casing 13. When the rotating member 31 is made of a semi-transparent (especially white) material, when the lighting module 42 illuminates the back of the rotating member 31 on which the powder particles P are placed, the appearance of the particles can be accurately photographed. In addition, a light collecting lens (not shown) may be disposed on the front of the LED to increase lighting efficiency.

Specifically, when the surrounding is composed of white, the particle may be measured by a white field imaging method in which the particle is expressed in black. This method is an optical illumination configuration that is advantageous for separating particles in an image processing algorithm. To this end, the back light as described above is used. The lighting is preferably made of LED (LED) so that it can be driven for a long time. For the diffusion of the light, the powder particles P have a structure disposed on an acrylic-based diffusion plate, and the rotating member 31 functions as a diffusion plate.

When 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 to be unable to see the whole particle with the same focus. In addition, since the rotating member rotates for several measurements, it is difficult to focus constantly.

Therefore, there is a need for a method to accurately focus 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 measurement area is moved (approximately 0.5 mm) due to rotation of the rotating member 31, an image is captured using a camera and it is determined whether the captured image is in focus. At this time, if it is determined that it 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 is first moved by 20 µm increments to the top, and then, by 20 µm increments by the bottom, it is possible to measure at that location after finding the optimal focus position.

At this time, whether or not the focus is determined by measuring the image frequency and sharpness (Sharpness) of the captured image can be determined as appropriate. The method of determining whether to focus using the image frequency and the sharpness of the image is a well-known technique, so a detailed description thereof will be omitted.

Determining whether focus is performed may be performed by a separately configured focus determination unit (not shown), and the focus determination unit may be provided in the particle photographing unit 4 or the particle analysis unit 5.

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

Meanwhile, the particle analysis device 100 may further include a particle analysis unit 5 that analyzes characteristics of the particles photographed by the particle imaging unit 4.

The particle analysis unit 5 is a structure that extracts the black image from the image obtained by lighting the back side of the powder through the LED illumination at the bottom of the camera 41 in the particle photographing unit 4, and uses an image separation algorithm. The separation of superimposed powder images enables accurate particle analysis.

4 is a flow chart showing an example of the process of extracting the shape of the particles in the particle analysis unit.

In the drawing, the case where the particles are light color and the part where the particles are placed is dark, but the same description can be applied to the case where the particles are dark color and the part where the particles are placed is light.

First, when a color image is taken, when the color image is input (S1), it is converted to a black and white image (S2), and the brightness difference is emphasized by converting and binarizing the black and white image (S3). Next, while extracting the inner contour of the powder (S4), extracting the outer contour of the powder (S5), combining them (S6), and measuring the powder form through the process of classifying each particle (S7). Subsequently, particle analysis is performed using the measured powder form (S8).

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

Although the watershed algorithm is a well-known technique, the process of applying to separation of particles in an image according to this embodiment is briefly described, and first, the gradient of the image is obtained. Through this process, "valley" or "puddle" is created in a flat area without texture (low point), and "mountain" or "mountain range" (high point) is generated in the part where the edge in the image is prominent. In the gradient image created in this way, it starts to fill the water at the points specified by the user or the points set by the algorithm and stops when other areas meet. The area connected by the marker is filled with water and merged into one powder particle area. Through this method, separation of particles in the overlapping image is realized.

FIG. 5 is a view showing an example of data processed by the particle analysis unit. FIG. 5A shows data converted into a black and white image, FIG. 5B shows data obtained by binarizing a black and white image, and FIG. 5C shows data obtained by extracting a powder inner contour. , FIG. 5D shows data obtained by extracting the outer contour of the powder, and FIG. 5F shows data classified for each particle by a watershed algorithm. Meanwhile, FIG. 5E is a diagram illustrating the concept of a watershed algorithm.

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

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

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

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

Next, when the operation starts in this state, the screw 22 is rotated to drop the powder into the rotating member 31. Meanwhile, the rotating member 31 is rotated together with the rotation of the screw 22. If the screw 22 is operated while the rotating member 31 rotates for one rotation so that the powder falls, the powder may not be stacked and may be dispersed in a circumferential shape on the rotating member 31 (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 actuator 23 for rotating the rotating member 31 while the actuator 23 for driving the screw 22 is stopped may further operate to further increase the dispersion degree of the powder.

It is also possible to adjust the degree of dispersion of the particles for effective dispersion of the powder. This can be achieved by controlling 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, increasing the density of the powder and lowering the dispersion. On the other hand, when the speed of the rotating member 31 is increased, the amount of accumulation of the powder particles P can be reduced, so that the density at which the powder is collected decreases and the dispersion degree increases.

Thereafter, for measurement of the camera 41, the dispersed particles are rotated within a distance of 0.5 mm from the bottom of the camera 41, and then photographed with the camera 41. The image of the particles thus photographed is as shown in FIG. 7. Then, the image of the captured particle is analyzed through an analysis algorithm such as WaterShed (S60). Repeat this analysis to continue. When the diameter of the circumference formed by the powder is 140 mm, if the image is obtained while rotating the rotating member 31 so as to move by 0.5 mm, images of about 850 sheets can be obtained. Accordingly, the sampling amount of the powder image can be increased and reliability of measurement data can be increased.

The camera can acquire the image of the particle by taking a certain period of time after the screw of the particle supply unit and the rotating member of the particle dispersion unit are operated, and when processing the image of the captured particle, it uses the blob algorithm, etc. It is possible to check the presence of particles in the inside.

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

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

In the detailed description of the present invention described above, the present invention has been described with reference to preferred embodiments of the present invention, but those skilled in the art or those skilled in the art will appreciate the spirit of the present invention as set forth in the claims below. And it will be understood that various modifications and changes can be made to the present invention without departing from the technical field.

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

Claims (7)

As a device for analyzing fine particles in the micrometer unit,
Body Part,
It is installed on the upper portion of the body, having a moving member for moving the stored powder, the particle supply unit for supplying particles by causing the powder to be moved and then dropped by the moving member,
Particle dispersion in which particles are dispersed while being spaced apart from the particle supply unit and installed at a lower portion of the body, having a rotating member rotating, and particles falling from the particle supply unit falling on the rotating member and rotating together with the rotating member. Wealth and
A particle photographing unit having an image photographing means installed on an upper portion of the body portion and photographing particles dispersed by the particle dispersion unit as the image photographing means,
The particle supply unit includes a hopper in which a space for storing powder is formed, and a screw that penetrates the powder storage space of the hopper and is installed such that an end thereof protrudes outward from the hopper, and the powder moved by rotation of the screw is hopper. It is divided into both sides at the point through which it is discharged and dropped to the outside of the hopper.
The rotating member of the particle dispersion portion is made of a flat shape having the same height as the point where the particles fall and the outer rim,
The particle photographing unit, the image photographing means is provided with a moving means capable of horizontal movement in the width direction in which the particles are dispersed,
The body portion,
A casing in which a driver for rotating the rotating member is mounted,
Vertical plate disposed upright on one side of the casing And
It is coupled to the upper vertical plate, and includes a horizontal plate on which the particle supply unit is installed on one side of the upper surface and the particle photographing unit is installed on the other side,
A hole is formed in the horizontal plate for imaging the particles, and the hole is formed as a long hole on one side to enable the image capturing means to move in a width direction in which particles are dispersed,
The surface of the hopper through which the screw passes is disposed outside the horizontal plate.
Particle analysis device. delete According to claim 1,
A particle analysis device comprising the screw of the particle supply unit and the rotating member of the particle dispersing unit capable of adjusting the rotational speed and controlling the amount of dispersion of the particles by adjusting the speed of the screw and the rotating member. According to claim 1,
Particle analysis device that allows all or part of the hopper to be made transparent to know the amount of powder stored in the hopper. According to claim 1,
The particle photographing unit,
Camera for acquiring the image of the particles and
LED lighting disposed under the camera and illuminating the particles
Including,
It is a structure that extracts the black image by illuminating the back side of the particle through the LED illumination at the bottom of the camera.
Particle analysis device. The method of claim 5,
The particle photographing unit,
It is provided with a moving means capable of moving the camera up and down,
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 grasped from the acquired plurality of images, and characteristics of particles are analyzed with the images acquired at the position of the corresponding focus. doing
Particle analysis device. The method of claim 1 or any one of claims 3 to 6,
Further comprising a particle analysis unit for analyzing the characteristics of the particles photographed by the particle imaging unit,
The particle analysis unit, a particle analysis device capable of accurate particle analysis through separation of superimposed powder images using an image separation algorithm.

Images