KR20170133156A - Color-based sorting apparatus - Google Patents

Abstract

Disclosed is a color selecting device. The color selecting device selects selected object particles by using a color difference. The color selecting device comprises: a raw material supplying unit; a detecting unit; and an air injecting device. The raw material supplying unit includes a hopper having a discharging unit for falling the selected object particles and discharging the same. The detecting unit photographs the selected object particles discharged from the discharging unit; and detects a defective matter or a foreign substance. The air injecting device blows the defective matter or the foreign substance determined as a selected object in the detecting unit to be removed. The detecting unit includes: an irradiating light source which irradiates light to an image detecting point to photograph images of the selected object particles which are passed through the image detecting point by being fallen from the discharging unit; and two or more multi-refraction reflecting mirrors which are provided at a straight distance from the image detecting point, and refract the images of the selected object particles passing the image detecting point more than twice to be reflected to a camera. The present invention is provided to shorten a gap between the selected object particles, and the camera for photographing the selected object particles; and to extend a scanning width of a subject (the selected object particles), thereby remarkably reducing a volume of the detecting unit. The present invention removes a shutter which arranges and supplies the selected object particles by installing a pair of supply rollers inside the hopper. The present invention remarkably reduces a height or a volume of the color selecting device by directly supplying the selected object particles to the hopper.

Description

{COLOR-BASED SORTING APPARATUS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color sorting apparatus, and more particularly, to a color sorting apparatus for sorting minerals, grains, resins or powders by sorting and discharging sorted particles through a pair of rollers, It is possible to refine the image pickup of the particle to be sifted more than twice and to acquire the necessary wavelength by using the prism so that the sorting object can be more easily selected and the position and interval of the camera And more particularly to a color separator which can be miniaturized because it can be arranged in a remarkably short time.

In general, a color sorter is a device for sorting and separating defective substances or foreign substances contained in the particles to be sorted by analyzing the colors of the particles to be sorted. FIG. 1 schematically shows a general internal structure of a color sorter for grain.

1, the conventional color sorter for grain includes a grain discharging unit 100 for discharging downward the grain G to be sorted, a fluorescent lamp 200 for providing visible light and infrared rays for image pickup, (CCD) imaging unit 400 for imaging the grain G, and an infrared ray imaging unit 500. The infrared ray imaging unit 500 includes a CCD (Charge Coupled Device)

The image signals of the grains G picked up by the CCD imaging section 400 and the infrared ray imaging section 500 are analyzed by an image processing apparatus not shown and the grains G picked up as the analysis result are defective Or if it is determined that the foreign object is a foreign substance, the air nozzle 600 is operated to remove defective or foreign matter.

As shown in the figure, the conventional color sorter for grain is provided in such a direction that the image pickup units 400 and 500 are directed to the grain G on both sides of the grain G discharging direction in order to image the grain G. At this time, in order to secure a sufficient focal distance at the time of imaging, a sufficient distance must be ensured between the imaging units 400 and 500 and the grain G, thereby increasing the volume of the entire apparatus and raising the unit price .

Accordingly, there is a serious need for a device that can overcome the unreasonable points of the conventional color grain discriminating device and make the size of the device compact.

On the other hand, a color sorter is disclosed in Korean Patent No. 10-0295184 (public notice: 2001.07.12) as a prior art. 1, the color sorter 100 is provided with a hopper 1 for containing a particulate material in an upper layer, a feeder 2 (aka a shooter) is provided below the hopper 1, and a feeder 2 The structure is inclined at the front end and has a V-shaped or U-shaped guide groove 17 so that the granular material spreads well down to the descending slope 4.

However, in the color sorter having such a structure, when the granular materials are aligned and dropped into the feeder (shooter), the granular materials are dispersed or scattered when the discharge port is large, and when they are narrow, they are tangled with each other.

Further, since a shoe for aligning the particles of the particles to be sorted is provided in the lower part of the hopper of the color sorter, the height of the color sorter is increased to increase the volume.

. Korean Patent No. 10-0295184 (Published on July 12, 2001)

It is an object of the present invention to provide a means capable of shortening the interval between the target particle and the camera for photographing the target particle to widen the scan width of the subject (the target particle) And to provide a means for supplying the same.

It is also an object of the present invention to provide a muffler structure provided at a lower portion of a hopper to eliminate a shooter in which particles of sorting particles are aligned and supplied and feed the sorting particle directly to the sensing portion, To provide a means to reduce the amount of money.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to at least partially solve the problems in the conventional arts. It can be understood.

According to the present invention, the above objects can be accomplished by a method for sorting particles to be sorted by using a color difference, comprising: a raw material supply part composed of a hopper having an outlet for dropping and discharging particles to be sorted; And an air injector for blowing out and removing defective matter or foreign matter identified as a sorting object in the detection section, wherein the detecting section is configured to drop from the outlet and to detect an image detection point An irradiation light source for irradiating light to the image detection point for image pickup of a particle to be sorted passing through the image detection point; And at least two multiple refraction mirrors disposed at a straight line distance from the image detection point for refracting an image of the particle to be sifted passing through the image detection point more than twice and reflecting the refraction to the camera. Is achieved by the color sorting apparatus.

The irradiation light source may include a cylindrical lens for condensing the light of the LED.

The detection unit may be disposed symmetrically on both sides with respect to the image detection point.

A prism filter may be installed between the image detecting point and the multiple refracting mirror or between each multiple refracting mirror for filtering the wavelength of the reflected image to separate the two colors.

 Wherein the raw material supply portion includes a pair of first and second supply rollers provided on both sides of the hopper corresponding to an upper side of the discharge port and rotating in a direction opposite to a falling direction of the particles to be sorted, The first supply roller and the second supply roller may be configured to rotate at different rotational speeds.

Wherein each axis of the first supply roller and the second supply roller is provided in a slot formed in the hopper so as to vary the interval between the first supply roller and the second supply roller, The distance between the rollers can be formed to be 0.1 - 3 mm larger than the size of the particles to be sorted belonging to the normal range.

Wherein the multiple refracting mirror for reflecting an image of the multiple refractory halving mirrors to the camera is provided so as to be adjustable in angle by an angle adjusting means so that an image of the to- And may be configured to reflect to the camera.

According to the present invention, it is possible to shorten the interval between the cameras to pick up the particles to be sorted and the cameras for picking up the particles to be selected, thereby widening the scan width of the subject (selection subject particle), thereby remarkably reducing the volume of the detection unit .

In addition, by providing a pair of supply rollers in the hopper, it is possible to remove the shooter that supplies and sort the particles to be sorted, and the particles to be sorted can be supplied directly to the sensing portion from the hopper, whereby the height or volume of the color separator itself becomes remarkable It is possible to provide an effect of reducing the amount of the ink.

1 and 2 are schematic views showing a conventional color separator.
3 is a schematic view showing a color sorter according to a first preferred embodiment of the present invention.
4 is a schematic view showing a color sorter according to a second preferred embodiment of the present invention.
5 is a schematic view showing a color sorter according to a third preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.

3 is a schematic view showing a color sorter according to a first preferred embodiment of the present invention.

As shown in FIG. 3, the color sorter 10 according to the present invention is for sorting the particles to be sorted (A) by using a color difference, and comprises a discharge port A detector 40 for detecting defective particles or foreign matter by picking up the particle to be sorted A discharged from the discharge port 34, And an air injector (50) for blowing off the defective or foreign matter determined to be the sorting object in the washing machine (40).

This will be described more specifically.

The raw material supplying section 30 aligns the sorting target particles A supplied to the hopper 32 and drops them to the discharge port 34. [ The discharge port (34) is disposed directly below the bottom surface of the hopper (32). That is, the raw material supply unit 30 is configured to supply directly from the hopper 32 to the detection unit 40 without providing a shooter for sorting and supplying the particles to be sorted A as in the prior art.

A first supply roller 36A and a second supply roller 36B are provided at predetermined intervals on both sides of the hopper 32 corresponding to the upper portion of the discharge port 34 of the hopper 32. [ The first and second supply rollers 36A and 36B are configured to rotate in opposite directions to the falling direction of the particle to be sorted A and in particular the first supply roller 36A and the second supply roller 36B And rotate at different rotational speeds. The first and second supply rollers 36A and 36B may be configured to be driven directly by a drive motor and configured to rotate at different rotational speeds in opposite directions to each other by gears or belts. The first and second supply rollers 36A and 36B are cylindrical rollers.

The configuration in which the first and second supply rollers 36A and 36B are rotated in the direction opposite to the dropping direction of the particle to be sorted A and the rotation speeds thereof are different is that the size of the normal sorting target particle A is The sorting target particle A having a large size is pushed out in one direction and the sorting target particles A having a size within the normal range are aligned and fall into the outlet 34. [

For this purpose, it is preferable that the interval between the first supply roller 36A and the second supply roller 36B is formed larger by 0.1 - 3 mm than the size of the particle to be sorted A belonging to the normal range. This is intended to prevent the sorting target particle A larger than the size of the normal sorting particle (A) from passing between the first and second supply rollers 36A and 36B and to push it in one direction. If it is smaller than 0.1 mm, it is difficult to pass the particle A because the shape of the particle A is not uniform. When the particle A is larger than 3 mm, the particles A outside the normal range are also undesirable.

At this time, the interval between the first supply roller 36A and the second supply roller 36B can be varied and adjusted. 3, the axes 37 of the first supply roller 36A and the second supply roller 36B are provided in the elongated holes 35, and by tightening or unfastening the unshown tightening bolts or the like The distance between the first supply roller 36A and the second supply roller 36B can be adjusted by adjusting the position of the shaft 37. [

Here, when the first supply roller 36A and the second supply roller 36B are rotated at different rotational speeds in opposite directions to each other, the larger size selection target particles A are separated from the first supply roller 36A and the second supply roller 36A, The particles to be sorted A having the normal size can pass through the gap between the first supply roller 36A and the second supply roller 36B and fall into the discharge port 34 without passing between the rollers 36B.

As described above, the first supply roller 36A and the second supply roller 36B are provided in the hopper 32 so that the first supply roller 36A and the second supply roller 36B are separated from the sorting target particle A, A separate shooter, which is long and obliquely installed at the lower part of the hopper 32, is not required to be aligned and supplied to the sorting particle A by supplying the sorted particles to the discharge port 34. Therefore, the height of the color separator 10 And the volume of the color separator 10 as a whole can be reduced.

The detection unit 40 is for detecting defective or foreign matter by picking up the particles to be sorted falling and discharged through the discharge port 34. The detection unit 40 drops from the discharge port 34 and passes through the image detection point P An irradiation light source 42 for irradiating light to the image detection point P for image pickup of the particle to be sorted A and an image detection point P arranged at a straight line distance from the image detection point P And at least two multi-refraction mirrors 44 for refracting the image of the passing subject particle A to be refracted more than once and reflecting it to the camera 46.

At this time, the irradiation light source 42 includes a cylindrical lens 42B for condensing the light of the LED 42A. The reason why the irradiation light source 42 is used as the cylindrical lens 42B is that high light intensity can be exerted even in the low power low light mode.

The illumination light source 42, the multiple refraction mirror 44 and the camera 46 constituting the detection unit 40 are arranged symmetrically on both sides with respect to the image detection point P, respectively.

In this embodiment, as a means for refracting the image of the particle to be sorted A more than twice, the multiple refracting mirror 44 is divided into a first multiple refracting mirror 44A close to the image detecting point P And a second multiple refraction mirror 44B for reflecting the image reflected by the first multiple refraction mirror 44A to the camera 46 again. In the present embodiment, the number of the multiple refracting mirror 44 is two, but the number is not limited to two, and may be two or more, preferably two to ten. As described above, by increasing the number of the multiple refracting mirrors 44, the distance between the camera 46 and the image detecting point P (a substantial distance, not a reflection distance) can be reduced.

The wavelength of the reflected image is filtered between the image detecting point P and the first multiple refraction mirror 44A or between the first and second multiple refraction mirror 44A and 44B, A prism filter 48 is provided. This prism filter 48 is used to determine the image of the target particle A to be reflected on the first multiple refraction mirror 44A or the second multiple refraction mirror 44B at the image detection point P Only the color of the wavelength is acquired. In this manner, only the color of a specific wavelength can be acquired through the prism filter 48, so that the image of the particle to be sorted A can be detected more accurately.

Meanwhile, as shown in FIG. 4, the color separator 10 according to the second embodiment is not provided with the prism filter 48. That is, the prism filter 48 may not be provided in the detection unit 40 as in the other embodiments.

Hereinafter, the operation of the color separator 10 according to the present invention will be described.

When the first and second supply rollers 36A and 36B are rotated at different rotational speeds in opposite directions to each other, the sorting target particles A supplied to the hopper 32 are sorted in the aligned state, (36A, 36B), falls to the discharge port (34), and is discharged. At this time, among the particles to be sorted (A) housed in the hopper 32, particles having a size out of the normal range can not pass between the first and second supply rollers 36A and 36B, do.

In this manner, the first and second supply rollers 36A and 36B provided in the hopper 32 rotate in opposite directions to rotate at different rotational speeds, Can be stably aligned without being lumped or scattered and can be supplied to the image detection point P accurately.

When the particles A to be sorted received in the hopper 32 are aligned in a stable state and fall into the image detection point P through the discharge port 34, The particle to be sorted A passing through the screen P is irradiated with light and the image of the particle to be sorted A is reflected by the first multiple refraction mirror 44A Is filtered while passing through the prism filter 48 in the first multiple refracting mirror 44A, and then reflected to the camera 46 by the second multiple refracting mirror 44B.

At this time, the light emitted from the LED 42A of the irradiation light source 42 is condensed by the cylindrical lens 42B and irradiated to the image detection point P, A can be easily detected and a prism filter 48 is provided between the first multiple refraction mirror 44A and the second multiple refraction mirror 44B so that reflected refraction particles A) It is possible to acquire only necessary wavelengths after decomposing the light wavelength of the image, so that the image of the particle to be sorted A can be acquired more accurately.

Based on the detection signal of the camera 46 that has detected the image of the particle to be sorted A passing through the image detection point P in the above-described process, the control unit (not shown) determines whether the particle to be sorted A is defective If it is abnormal, it is operated to operate the air injector 50 to blow out the defective particles.

4, the color separator (10) according to the third embodiment reflects an image from among the multiple refraction mirror (44) to the camera (46) lastly, as shown in FIG. 4 The second multiple refracting mirror 44B is provided so as to be adjustable in angle by the angle adjusting means 60 so that the images of the to-be-selected particles A are made to have mutually different characteristics Except that it is made to be reflected to the other respective cameras 46B and 46C.

In this case, although the angle adjusting means 60 is not shown in the drawing, a housing for receiving the second multiple refracting mirror 44B is hinged to the frame, a semicircular rack gear is coupled to the back surface of the housing, The angle of the second multiple refraction mirror 44B can be varied by engaging the pinion gear of the second multiple refraction mirror 44B with the rack gear so that the step motor is driven and controlled.

Each of the cameras 46B and 46C can be constituted of a UV camera, a visible light camera, and an IR camera.

As described above, since the second multiple refraction mirror 44B can be varied by the angle adjusting means 60 and each of the cameras 46, 46B and 46C having different characteristics can be applied, The user can select one of the cameras 46, 46B, and 46C of the photographing device (photographing target particle).

As described above, the light is condensed and irradiated onto the image detection point P through which the particle to be sorted A passes, and the image is multiply reflected by the multiple refracting mirror 44 to the camera 46 It is possible to shorten the interval between the cameras 46 for photographing the particle to be sorted A and to enlarge the scan width of the particle to be selected A so that the volume of the detector 40 And first and second supply rollers 36A and 36B which are rotated in mutually opposite directions and rotate at different rotational speeds are provided in the hopper 32. The sorting target particles A are easily and accurately aligned .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.

10: Color sorting device 30: Material supply part
32: hopper 34: outlet
36A and 36B: first and second supply rollers 40:
42: irradiation light source 42A: LED
42B: cylinder lens lens 44: mirror for multiple refraction mirrors
44A: first multi-refraction mirror 44B: second multi-refraction mirror
46, 46A, 46B: camera 48: prism filter
50: air injector 60: angle adjusting means

Claims (7)

The selection target particles are selected using color difference,
And a hopper having a discharge port for dropping and discharging the particles to be sorted, a detector for detecting defective or foreign matter by picking up the particles to be sorted discharged from the discharge port, and a defective And an air injector for blowing out water or foreign matter,
Wherein:
An irradiation light source for irradiating the image detection point with light for image capturing of the particle to be sorted falling from the outlet and passing through the image detection point; And
And at least two multiple refraction mirrors disposed at a straight line distance from the image detection point for refracting an image of the particle to be sifted passing through the image detection point more than once and reflecting the refraction to the camera. ,
Color selection device. The method according to claim 1,
The irradiation light source
And a cylindrical lens for collecting the light of the LED.
Color selection device. The method according to claim 1,
Wherein:
Wherein the image sensing unit is disposed symmetrically on both sides with respect to the image sensing point.
Color selection device. The method according to claim 1,
Wherein a prism filter is provided between the image detection point and the multiple refraction mirror or between each multiple refraction mirror for filtering the wavelength of the reflected image to separate the two colors.
Color selection device. 5. The method according to any one of claims 1 to 4,
The raw-
And a pair of first and second supply rollers provided on both sides of the hopper corresponding to an upper side of the discharge port and rotating in a direction opposite to a falling direction of the particles to be sorted, 2 feed rollers rotate at different rotational speeds.
Color selection device. 6. The method of claim 5,
Wherein each axis of the first supply roller and the second supply roller is provided in a slot formed in the hopper so as to vary the interval between the first supply roller and the second supply roller, And the distance between the rollers is 0.1 to 3 mm larger than the size of the particles to be sorted belonging to the normal range.
Color selection device. 6. The method of claim 5,
Wherein the multiple refracting mirror for reflecting an image of the multiple refractory halving mirrors to the camera is provided so as to be adjustable in angle by an angle adjusting means so that an image of the to- And the light is reflected by the camera.
Color selection device.

Images