JP2008212778A - Aggregate sorting apparatus - Google Patents

Aggregate sorting apparatus Download PDF

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Publication number
JP2008212778A
JP2008212778A JP2007050057A JP2007050057A JP2008212778A JP 2008212778 A JP2008212778 A JP 2008212778A JP 2007050057 A JP2007050057 A JP 2007050057A JP 2007050057 A JP2007050057 A JP 2007050057A JP 2008212778 A JP2008212778 A JP 2008212778A
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Japan
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aggregate
value
sorting
image
larger
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JP2007050057A
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Japanese (ja)
Inventor
Tetsuya Inoue
Hideto Sasaki
哲也 井上
英人 佐々木
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Pacific Systems Corp
Taiheiyo Cement Corp
パシフィックシステム株式会社
太平洋セメント株式会社
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Priority to JP2007050057A priority Critical patent/JP2008212778A/en
Publication of JP2008212778A publication Critical patent/JP2008212778A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an aggregate sorting apparatus capable of sorting only large lumpy aggregate of which the long diameter is larger than a reference value to remove the same and capable of altering the reference value in an extremely easy manner without altering a machine device. <P>SOLUTION: The aggregate sorting apparatus is constituted of at least an illumination means 1 for illuminating fed aggregate, a photographing means 2 for photographing the illuminated aggregate, an image processing means 6 for extracting large lumpy aggregate by subjecting the edge part of the binary image obtained by photographing to expansion treatment and judging the size and/or area of the large lumpy aggregate from the image, a detection means 6 for comparing the size and/or area of the judged large lumpy aggregate with respective reference values and outputting a removal signal in a case larger than the reference values and a removing means for removing the large lumpy aggregate larger than the reference value according to the removal signal. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention compares the size and / or area of mined limestone, crushed stone, concrete waste, and other concrete aggregates, and automatically selects and removes large aggregates exceeding a predetermined reference value. The present invention relates to a material sorting apparatus.

Aggregates occupy about 70% of the concrete volume, and the properties of the aggregates greatly affect the physical properties of the concrete. That is, the aggregate plays a role such as densifying the concrete structure and suppressing heat of hydration.
For this reason, to make good-quality concrete, use high-quality aggregates that are hard, physically and chemically stable, have appropriate particle sizes and shapes, and do not contain harmful amounts of impurities, salt, etc. There is a need to.

The quality of crushed stone and crushed sand for concrete is defined by JIS. For example, the performance rate (grain shape determination performance rate) is defined as 55% or more for crushed stone and 53% or more for crushed sand.
The larger the performance rate, the better the aggregate is, and it is judged to be a good aggregate. Aggregates with a high performance rate have round particles. The larger the performance rate, the smaller the unit water volume of concrete for obtaining the same slump.
That is, an aggregate having a more uniform particle size and a rounder particle shape is a better aggregate.

The river gravel and river sand that have been used in the past are prohibited from being collected, and crushed stone and sea sand have been used instead. However, sea sand causes salt damage, and therefore, the use of crushed stone and concrete waste is increasing. In particular, aggregates from scrap concrete are made from conventional river gravel, and can be used as high-quality aggregates. Also, they are desired to be used from the effective use of resources, and are defined as JIS A 5021. It was.

  Conventionally, aggregates for concrete have been used by crushing crushed stone produced by crushing raw crushed stone or concrete waste into a predetermined size with a crusher or the like, and sieving with a sieve. However, in the conventional sieving, the particle size is not always uniform. This is because, even if the major axis is larger than the sieve of the aggregate upper limit diameter, if the minor axis is short, the sieve passes through the mesh.

The existing sieving technology includes a first floor screen in which comb-shaped grizzly river units are arranged in series in a plurality of steps with a step, and a comb-shaped rod bar unit having an interval smaller than the interval between the grizzly rivers at the lower position. There is disclosed a vibration sieving device comprising a second floor screen in which a plurality of steps are arranged in series with a step (see Patent Document 1).
Further, in a vibrating feeder with a screen comprising a screen and a vibrating feeder for transferring the supplied rock while sorting it into large blocks and fine grains, the screen is a perforated flat plate in which a plurality of through holes of the same area are arranged on the entire surface. The second perforated flat plate fixed inside the trough and placed on the perforated flat plate and having the same area and the same arrangement of the perforations of the perforated flat plate as the vibration advancing direction of the vibration feeder A vibration feeder with a screen is disclosed (Patent Document 2), which is arranged to be movable forward and backward at right angles to the vertical axis, and is provided with forward and backward moving means of the second perforated flat plate.
Further, as a technique for continuously separating a large amount of rocks such as crushed stones and aligning the sizes thereof, there are a plurality of bar-shaped members that are arranged in parallel at regular intervals and bent in the shape of a "<", and an upper straight portion of the bar-shaped member A rock fractionation device is disclosed that includes a sieve portion having an inclined sieve surface formed by a bent portion of a rod-like member, a sieve portion having a sieve surface end portion, and a vibration motor for vibrating the sieve portion. (See Patent Document 3).

In addition, for concrete waste materials, a configuration equipped with a vibration sieve plate that drops crushed stones within a specified size smaller than a predetermined size from a predetermined size hole, and drops crushed stones larger than a specified size from a downstream edge. Discloses a sorting device in a concrete waste recycling plant that can obtain two sizes together (see Patent Document 4).
JP 09-085173 A Japanese Patent Laid-Open No. 10-066938 JP 2000-334383 A JP 09-173980 A

However, all of these techniques are classified according to whether or not they pass through gaps (intervals and holes) of a predetermined size. For example, when the shape is a rectangular shape or a rod shape, they are not sufficiently separated. However, there is still a problem that the particle shape is not uniform.
That is, even if the major axis is larger than the mesh size of the upper limit diameter of the aggregate, if the minor axis is short, it passes through the gap. This is because if it is large, it may not pass through this gap.

  As a result of earnest research, the present inventors can select and remove only large aggregates whose major axis is larger than the reference value, and without changing the mechanical device, in order to improve the above problems. It came to complete the aggregate sorter which can change a standard value very easily.

  That is, large aggregates whose aggregate major axis is greater than or equal to the reference value are discharged out of the system from aggregates conveyed at a speed of 100 to 300 m / min by a conveyor means such as a belt conveyor, and the bone within the reference value is discharged. An object of the present invention is to provide an aggregate sorting device that can sort only aggregates and can automatically remove only massive aggregates exceeding a reference value even if the size of aggregates being conveyed changes. .

  As a result of intensive studies to solve the above-mentioned problems, the present inventor has found that a large aggregate is detected by an optical technique, and is a transport means for transporting the aggregate according to the present invention, and a bone to be transported. Illuminating means for illuminating the material, photographing means for photographing the illuminated aggregate, image processing means for determining the size and / or area of the massive aggregate based on the photographed image, and a reference value or more An aggregate sorting apparatus characterized by comprising removal means for removing the massive aggregate is completed.

That is, the present invention obtains an image obtained by extracting a large aggregate by performing an expansion process on the edge portion of the binary image, and determines the size and / or area of the large aggregate from the image. The aggregate sorting device is characterized by detecting and removing large aggregates larger than the value (claim 1).
Next, at least illumination means for illuminating the conveyed aggregate, imaging means for photographing the illuminated aggregate, and image processing means for determining the size and / or area of the massive aggregate are determined. Detecting means for comparing the size and / or area of the aggregate and the respective reference values, and outputting a removal signal when the reference value is larger than the reference value; and removing means for removing a large aggregate larger than the reference value according to the removal signal The aggregate selection device according to claim 1, wherein the aggregate selection device is configured as follows.
Furthermore, the imaging | photography means which image | photographs the illuminated aggregate is a CCD camera, The aggregate selection apparatus of Claim 2 characterized by the above-mentioned (Claim 3).
Furthermore, the angle of the irradiation light central axis of an illumination means is an elevation angle of 60-70 degree | times, It is the aggregate selection apparatus of Claim 2 and Claim 3 (Claim 4).
Further, the removing means is any one of a discharge damper device, a dropout conveyor device, an extrusion device, a scraping device, a compressed air injection device, and a pickup device. The aggregate sorting apparatus is described (claim 5).
The bone according to any one of claims 1 to 5, wherein the aggregate is limestone coarse aggregate for concrete, crushed coarse aggregate for concrete, recycled coarse aggregate from concrete waste, or rough crushed stone. A material sorting device (claim 6).

The aggregate used in the present invention includes concrete limestone coarse aggregate, concrete crushed coarse aggregate, recycled coarse aggregate produced from concrete waste, and rough crushed stone mined by a mining face and crushed by a primary crusher. Say.

The aggregate sorting apparatus of the present invention can automatically detect and remove large aggregates larger than the surrounding aggregates from the aggregates being transported, and collect only the necessary aggregates.
Further, the aggregate sorting device of the present invention selectively detects and removes only the large aggregate larger than the reference value by setting the upper limit diameter of the required aggregate as the reference value, and below the reference value. Only the aggregate can be recovered.
Note that the aggregate sorting apparatus of the present invention automatically determines and measures the maximum diameter of the aggregate particle size as the major axis, so that the shape is rectangular or rod-like regardless of the minor axis length. However, if the major axis exceeds the reference value, it is removed as a large aggregate.
In addition, the aggregate sorting device of the present invention is very efficient because it can easily sort aggregates with a specified particle size without changing the mechanical device only by changing and inputting the reference value. Economical.
Further, since the image processing data at the time of selecting the aggregate is electromagnetic recording data, the data storage is extremely easy and the quality control of the aggregate is extremely excellent.

The present invention will be described below.
As the aggregate conveying means used in the present invention, any one of belt conveyors, chain conveyors, and roller conveyors can be appropriately selected and used.

The light source of the illumination means used in the present invention can be any of incandescent lamps such as incandescent lamps and halogen lamps, discharge lamps such as mercury lamps, sodium lamps, xenon lamps, metal halide lamps, xenon flashes, light-emitting diodes, fluorescent lamps, and projector lamps. Can be selected. A thing with a large light quantity is preferable, and a high-intensity projector illumination is especially preferable.
As the irradiation method of the illuminating means used in the present invention, stroboscopic irradiation is preferable, and the light emission time is preferably 50 μsec to 200 μsec.

Further, the irradiation angle of the illumination means used in the present invention is preferably an angle of the irradiation light central axis of preferably 60 to 70 degrees, particularly preferably 63 to 66 degrees.
If it is 70 degrees or more, the shadow of the aggregate becomes small, and the detection accuracy falls. Further, when other aggregate surfaces are wavy, the shadow of the aggregate formed on the surface is reduced, and the detection accuracy is lowered.
On the other hand, if it is 60 degrees or less, if there is a small large aggregate, this small large aggregate will be hidden in the shadow of the other large aggregate. Detection becomes difficult. In addition, shadows based on irregularities and other patterns on the surface opposite to the illumination of the aggregate are generated, and an error occurs.
The irradiation direction is preferably irradiation from upstream to downstream of the aggregate conveyance direction.

  The photographing means used in the present invention is not limited as long as it is a CCD camera, a CMOS camera, an FEVON camera, or a video camera that can obtain a digital image, but a CCD camera or a CMOS camera is preferable, and a monochrome CCD camera equipped with a single focus lens. Is particularly preferred.

The image processing means used in the present invention is obtained by irradiating the aggregate transported by the transport means with the illumination means, visualizing the reflected luminance of the shadow portion of the irradiated aggregate with a CCD camera, and obtaining it by image analysis. The size and position information of the large aggregate is detected from the binary image.
Therefore, by using an illuminating device with little diffusion and a large amount of light, shadows based on irregularities on the surface of the aggregate and other patterns are erased, and the aggregate itself is photographed in white.

In the image processing used in the present invention, first, in order to delete the luminance based on the part of the conveying means from the luminance distribution detected by the CCD camera, the particle size determination threshold is set by performing histogram processing and edge / line detection processing. By determining and performing luminance conversion again, a binary image from which only aggregate has been extracted is obtained.

Next, a method for detecting a large aggregate larger than the reference value from the aggregate image used in the present invention will be described.
The binary image (see FIG. 6) from which only the aggregate is extracted is subjected to image processing to expand the edge portion (the shadow portion of the aggregate). By this expansion, the white portion of the aggregate below the reference value is crushed first, and an image (see FIG. 7) in which only the white portion of the large aggregate above the reference value is extracted is obtained.

Next, a method for obtaining the size of the large aggregate from the image obtained by extracting only the white portion of the large aggregate is described.
First, each pixel of the image of only the large aggregate is scanned one horizontal line at every pixel pitch, and the length (Lx) of the longest pixel row is measured. Next, the length (Ly) of the longest pixel column is measured by scanning one vertical line in the same manner. The longer one of these is the aggregate long diameter measurement value (long diameter), and the short one is the aggregate short diameter measurement value (short diameter).
If there is not much difference from the reference value, the area of the aggregate large mass can be calculated from the major axis and the minor axis and compared with the area calculated from the standard value.

The detection means used in the present invention processes a plurality of nearest images by the above-described method for the aggregate (necessary aggregate) to be selected in advance, and the major axis and the minor axis of the aggregate particle size obtained by the image processing are processed. An average value of each diameter may be obtained, and an upper limit diameter and a lower limit diameter may be determined by adding an allowable range value to each average value.
Further, a specific value may be determined and used as the reference value. For example, in the case of crushed stone 2005, the upper limit diameter is 20 mm and the lower limit diameter is 5 mm.

Then, when the aggregate diameter measurement value (major axis) obtained by photographing / image processing of the aggregate on the conveying means is larger than the reference value, or when the area is larger than the reference value, a removal signal is transmitted to the removing means. To do.

Further, the detecting means used in the present invention also detects the position information of the foreign matter from the above-mentioned image and transmits the position information to the removing means, so that the massive aggregate deviating from the reference value is accurately removed by the removing means. It can be done.

In the present invention, the image processing by the image processing means, the detection of the large aggregate more than the reference value by the detection means, and the position information of the large aggregate that deviates from the reference value are processed by a computer.
Various data such as a photographed image photographed by the photographing means, a binary image processed by image processing, and an aggregate diameter measurement value may be displayed on the monitor.
These various data are stored in a computer or other electromagnetic recording medium together with data necessary for quality control such as detection date and time and shipping destination data.

The removing means used in the present invention is selected from one of a damper device, a dropout conveyor device, an extrusion device, a scraping device, a compressed air injection device, and a pickup device.
These removing means are provided downstream from the position of the conveying means where the photographing means is arranged.

A case where the removing means is a damper device will be described.
When the large block aggregate diameter measurement value measured by the photographed image exceeds the set reference value, the removal signal is transmitted from the detection unit to the removal unit, and the large block bone that causes the removal signal to be transmitted When the material is conveyed to the damper device, the damper driving device is driven, and the wings are rotated to feed the massive aggregate to the non-standard aggregate recovery line or the non-standard aggregate recovery box.
In addition, the aggregate when the removal signal is not transmitted passes through the damper device that is not rotating, and is transported as it is by the transport means, and is sent to the aggregate silo, the aggregate yard, or the shipping facility. .

Next, the case where the removing means is a dropout conveyor will be described.
When the large block aggregate diameter measurement value measured by the photographed image exceeds the set reference value, the removal signal is transmitted from the detection unit to the removal unit, and the large block bone that causes the removal signal to be transmitted When the material is transported onto the drop conveyor, the dropout conveyor driving device is driven, and the dropout conveyor is rotated to feed the large aggregate to the nonstandard aggregate recovery line or the nonstandard aggregate recovery box. .
It should be noted that the time from when the dropout conveyor starts to return to the initial horizontal state can be arbitrarily set in consideration of the transport time and detection time of the dropout conveyor.
Then, the aggregate when the removal signal is not transmitted passes through the dropout conveyor, is transported as it is by the next transport means, and is sent to the aggregate silo, the aggregate yard, or the shipping facility.

Next, the case where the removing means is an extrusion apparatus will be described.
An air cylinder or hydraulic cylinder is provided on the side of the conveying means for extending and contracting in the direction perpendicular to the conveying direction, and a rectangular plate for extruding large aggregate is attached to the tip of the cylinder. Yes. The plate is installed in such a state that a large mass on the conveying means can be extruded and removed from the conveying means by extension of the cylinder.
When the large block aggregate diameter measurement value measured by the photographed image exceeds the set reference value, the removal signal is transmitted from the detection unit to the removal unit, and the large block bone that causes the removal signal to be transmitted When the material is transported on the transport means on which the removing means is installed, the cylinder is extended, the large aggregate is pushed out from the transport means, and the non-standard aggregate recovery line provided on the side of the transport means Or send it to a non-standard aggregate collection box. Then, the cylinder extended to extrude the massive aggregate is immediately contracted and returned to its original state.
In addition, the aggregate when the removal signal is not transmitted is not pushed out by the removing unit, but is conveyed by the conveying unit as it is, and sent to the aggregate silo, the aggregate yard, or the shipping facility.

Next, the case where the removing means is a scraping device will be described.
One or a plurality of scraping device fixing shafts each having a scraping device attached to the tip thereof are connected to a rotating shaft provided above the conveying means. The rotating shaft is provided so as to rotate in the width direction of the conveying means. The scraping device scrapes out the large aggregate on the transporting means and removes it from the transporting device by rotating the rotating shaft.
That is, when the large aggregate diameter measurement value measured by the photographed image exceeds the set reference value, the removal signal is transmitted from the detection means to the removal means, which causes the removal signal to be transmitted. When the aggregate is transported onto the transport means on which the removing means is installed, the rotating shaft is rotated, the large aggregate is scraped from the transport means, and the nonstandard bone provided on the side of the transport means Send it to a material recovery line or a nonstandard aggregate recovery box.
In addition, the aggregate when the removal signal is not transmitted is not scraped off by the removing unit, but is transported by the transport unit as it is, and is sent to the aggregate silo, the aggregate yard, or the shipping facility.

Next, the case where a removal means is a compressed air injection apparatus is demonstrated.
A compressed air ejection nozzle is provided on the side of the conveying means so that the compressed air is ejected in a direction perpendicular to the conveying direction. The nozzle for jetting compressed air is connected to a compressor, a high-pressure air cylinder, and the like. The open / close valve of the compressed air ejection nozzle opens and closes depending on the presence or absence of a removal signal.
Then, when the measured mass of aggregate mass measured by the photographed image exceeds the set reference value, the removal signal is transmitted from the detection means to the removal means, which causes the removal signal to be transmitted. When the aggregate is transported onto the transport means on which the removing means is installed, the on-off valve is opened by a removal signal, and the compressed air is ejected from the compressed air ejection nozzle. The material is ejected / extruded from above the conveying means and fed into a nonstandard aggregate recovery line or a nonstandard aggregate recovery box provided beside the conveying means.
In addition, the aggregate when the removal signal is not transmitted is transported by the transport means as it is without being jetted / extruded by the compressed air, and sent to the aggregate silo, the aggregate yard, or the shipping facility.

Next, the case where the removing means is a pickup device will be described.
The pick-up device consists of a claw that scoops up or holds a large block aggregate or a claw that can be bent flexibly to fix and rotate the claw. Scoop up or hold the aggregate and rotate it onto a non-standard aggregate recovery line or non-standard aggregate recovery box provided beside the transport means, and the aggregate is recovered to a non-standard aggregate recovery line or non-standard aggregate It is what you drop into the box.

Next, although one example of the embodiment of the present invention is explained in detail, the present invention is not limited to these at all.
[Example 1]
The crushed stone aggregate stored in No. 5 aggregate silo (crushed stone 2015) was conveyed at 250 m / min by a belt conveyor.
Then, the crushed stone aggregate on the belt conveyor was illuminated with light by a stroboscopic illumination lamp, and the crushed stone aggregate was photographed by a monochrome CCD camera interlocked with the stroboscopic illumination lamp.
The image of the crushed stone aggregate taken was subjected to image processing to calculate a large block crushed aggregate major axis measurement value (major axis).
Next, the reference value was set to 22 mm.
Then, when the photographed large crushed stone aggregate moves on the dropout conveyor, if the large crushed stone aggregate diameter measurement value (major axis) exceeds the reference value, the detection means sends a removal signal to the removal means did.
Based on this removal signal, the drive device for the dropout conveyor was activated, and the large block crushed aggregate on the dropout conveyor was dropped and accommodated in a nonstandard aggregate collection box installed below the tip of the dropout conveyor.
When a large block of crushed stone aggregate above the reference value is removed, the dropout conveyor returns to the initial horizontal state, and the crushed stone aggregate for which no removal signal has been output is sent to the belt conveyor that follows the dropout conveyor, Furthermore, it was transported to the shipping facility ahead.

Next, the size of the crushed aggregate transported to the non-standard aggregate collection box and the shipping facility was verified.
The minimum long diameter of the large block crushed aggregate stored in the nonstandard aggregate recovery box was 23 mm. Moreover, the maximum long diameter of the crushed stone aggregate conveyed to the shipping facility was 21 mm.
Thus, it was verified by the method of the present invention that a large block of crushed stone aggregate having a set value of 22 mm or more was removed.

[Example 2]
A rough crushed stone (130 mm or less) mined by a mining face and crushed by a primary crusher was conveyed at 250 m / min by a belt conveyor.
And it carried out similarly to Example 1, and calculated the large-diameter crushed stone long diameter measured value (long diameter).
Next, the reference value was set to 130 mm.
Then, when the photographed rough crushed stone moved onto the dropout conveyor, the detection means transmitted a removal signal to the removing means when the large block rough stone long diameter measurement value (long diameter) exceeded the reference value.
Based on this removal signal, the drive device of the discharge damper device is operated, and the wings of the discharge damper device are rotated to guide the large block crushed stone to the discharge line. When large block crushed rough stones exceeding the reference value are removed, the wings of the discharge damper device return to the initial state, and the crushed rough stones for which the removal signal has not been output are guided to the belt conveyor leading to the crushed rough stone yard. It was transported to the previous crushed stone yard.

Next, we verified the size of the rough crushed stone guided to the discharge line and the rough crushed stone transported to the crushed rough yard,
The minimum long diameter of the large block crushed stone induced in the discharge line was 133 mm. Moreover, the maximum long diameter of the rough crushed stone conveyed to the rough crushed stone yard was 130 mm.
Thus, it was verified by the method of the present invention that large block crushed stones having a set value of 130 mm or more were removed.

As described above, according to the present invention, by setting a reference value composed of the upper limit diameter and the lower limit diameter of the aggregate to be selected, it is related to whether the target aggregate is rectangular or rod-shaped. Therefore, it is possible to select and remove large aggregates whose major axis is equal to or greater than the set reference value, and it is possible to select only aggregates having a set reference value or less.
Further, it is possible to easily select an aggregate having a specified particle diameter without changing the mechanical device only by changing and inputting the reference value.

If the reference value is not set, the program may be set so as to remove all large aggregates in the image in which only the white portion of the large aggregate is extracted.
If it does in this way, once it will start conveying aggregate, it will not need any manpower until it finishes conveying all the aggregates.

It is a principal part schematic diagram which shows an example of the aggregate selection apparatus concerning implementation of this invention. 1 is an overall schematic diagram illustrating an example of an aggregate sorting device according to an embodiment of the present invention. It is the schematic which shows an example which incorporated the aggregate selection apparatus concerning implementation of this invention in the crushing rough stone selection line. It is the picked-up image which image | photographed the aggregate on a belt conveyor and the massive aggregate more than a reference value by the aggregate selection apparatus concerning implementation of this invention. 5 is a luminance image obtained by performing image processing on the captured image of FIG. 4. 6 is a binary image obtained by binarizing the luminance image of FIG. 5. FIG. 7 is an image obtained by performing edge detection / expansion processing on the binary image in FIG. 6 and extracting only a large aggregate having a reference value or more.

Explanation of symbols

1: strobe illumination lamp 2: monochrome CCD camera 3: dropout conveyor drive device 4: belt conveyor 5: power supply for strobe illumination lamp 6: computer having image processing means and detection means 7: dropout conveyor 8: crushed stone aggregate 9: Large block of crushed stone aggregate 10 or more: Nonstandard aggregate collection box 11: Aggregate yard 21: Shadow of crushed aggregate 31: Tunnel 41: No. 6 silo 42: No. 5 silo 43: No. 7 tank 51: Ship loader 61: Transport ship 71: Mining face 72: Excavator 73: Dump truck 74: Grizzly vibration feeder 75: Crusher 76: Crushed stone yard 77: Crushed sand silo 78: Cone crusher

Claims (6)

  1. An image obtained by extracting a large aggregate by expanding the edge portion of the binary image is obtained, and a large block bone larger than a reference value is determined by determining the size and / or area of the large aggregate from the image. An aggregate sorting apparatus characterized by detecting and removing a material.
  2. At least illumination means for illuminating the conveyed aggregate, imaging means for photographing the illuminated aggregate, image processing means for determining the size and / or area of the massive aggregate, and the determined aggregate The detection means for comparing the size and / or area of each block with each reference value and outputting a removal signal when the reference value is larger than the reference value, and the removal means for removing the massive aggregate larger than the reference value according to the removal signal The aggregate sorting apparatus according to claim 1, wherein
  3. 3. The aggregate selecting apparatus according to claim 2, wherein the photographing means for photographing the illuminated aggregate is a CCD camera.
  4. 4. The aggregate sorting apparatus according to claim 2, wherein the angle of the irradiation light central axis of the illumination means is an elevation angle of 60 to 70 degrees.
  5. The removal means is any one of a discharge damper device, a dropout conveyor device, an extrusion device, a scraping device, a compressed air injection device, and a pickup device. Aggregate sorting device.
  6. 6. Aggregate sorting according to claim 1, wherein the aggregate is a limestone coarse aggregate for concrete, a crushed coarse aggregate for concrete, a recycled coarse aggregate from concrete waste, or a rough crushed stone. apparatus.


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JP2013052315A (en) * 2011-08-31 2013-03-21 Taisei Corp Large lump to be conveyed detecting system
KR101995973B1 (en) * 2018-07-09 2019-07-03 삼영플랜트주식회사 System for Analyzing Aggregate Size and Method thereof
WO2020111370A1 (en) * 2018-11-27 2020-06-04 삼영플랜트주식회사 Aggregate image separation system and method

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