AU702574B2 - Method and system for determining the geometric dimensions of particles of a pelletized and/or granulated material - Google Patents
Method and system for determining the geometric dimensions of particles of a pelletized and/or granulated material Download PDFInfo
- Publication number
- AU702574B2 AU702574B2 AU76190/96A AU7619096A AU702574B2 AU 702574 B2 AU702574 B2 AU 702574B2 AU 76190/96 A AU76190/96 A AU 76190/96A AU 7619096 A AU7619096 A AU 7619096A AU 702574 B2 AU702574 B2 AU 702574B2
- Authority
- AU
- Australia
- Prior art keywords
- particles
- radiation
- pelletized
- granulated material
- geometric dimensions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 239000008187 granular material Substances 0.000 title claims description 32
- 239000002245 particle Substances 0.000 title claims description 29
- 238000000034 method Methods 0.000 title claims description 22
- 230000005855 radiation Effects 0.000 claims description 30
- 238000005259 measurement Methods 0.000 claims description 15
- 239000008188 pellet Substances 0.000 claims description 14
- 238000011156 evaluation Methods 0.000 claims description 10
- 230000005670 electromagnetic radiation Effects 0.000 claims description 5
- 239000011435 rock Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000005453 pelletization Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910000278 bentonite Inorganic materials 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 241001484259 Lacuna Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means
- G01N15/0227—Investigating particle size or size distribution by optical means using imaging; using holography
Landscapes
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
P 8571 2 The object of the invention is to specify a method for determining the geometric dimensions of particles of a pelletized and/or granulated material, and a granularity measurement system for carrying out this method, the precision of which is greater than that of the known methods and measuring devices. In this case, it is desirable for the novel method and, respectively, the granularity measurement system for carrying out this method to allow determination of the geometric dimensions of the particles of the pelletized and/or granulated material.
According to the invention, the object is achieved by a method for determining the geometric dimensions of particles of a pelletized and/or granulated material, which is exposed to a radiation, such as electromagnetic radiation, sound or the like, and reflects it, the intensity distribution of the reflected radiation being measured and the geometric dimensions of the particles of the pelletized and/or granulated material being determined from this distribution. It has transpired that the evaluation of an intensity distribution of the reflected radiation allows a determination of the geometric dimension of the particles of the pelletized and/or granulated material that is particularly precise by comparison with the known prior art.
In an advantageous refinement of the invention, the two-dimensional intensity distribution of the reflected radiation is measured and the geometric dimensions of the particles of a pelletized and/or granulated material are determined from this distribution, by which means the precision of the method according to the invention may be increased further.
In a further advantageous refinement of the method according to the invention, the radiation is light. It has been shown that light is suitable for producing intensity contrasts in accordance with the geometric properties of particles of a pelletized and/or granulated material.
P 8571 3 According to a further advantageous refinement of the invention, the pelletized and/or granulated material is irradiated in a directional manner, by which means the intensity of the reflected radiation is increased. An increased intensity of the reflected radiation also increases the contrasts of the intensity distribution.
In a further advantageous refinement of the invention, the pelletized and/or granulated material is irradiated from at least three directions, preferably using radiation sources distributed uniformly over the circumference of a circle, which leads to a particularly contrasty intensity distribution, which represents the geometric structures of the particles of the pelletized and/or granulated material.
In a further advantageous refinement of the invention, in the intensity distribution of the reflected radiation, the intensity maxima and minima and their distance from each other are determined, preferably in eight to sixteen directions. In this case, the distance between intensity maxima and minima is a variable which is particularly suitable for representing the geometric dimensions of particles of a pelletized and/or granulated material. In this case, it has proven to be particularly advantageous to determine the distance between intensity maxima and minima in eight to sixteen directions, the directions advantageously all being at the same angle from one another. In this case, the number of eight to sixteen directions has proven to be a particularly suitable compromise between the requirement to measure in a few directions, in order to minimize the computing effort, and the requirement to measure in particularly many directions, in order to obtain the most precise possible image of the particles. In the case of approximately spherical particles, in particular, an increase in the number of directions in which the distance between intensity maxima and minima is determined does not lead to any noticeable improvement in precision in the determination of the geometric dimensions of the particles.
UJ! 1, P 8571 4 In a further advantageous refinement of the invention, a frequency distribution is ascertained from the distances between intensity maxima and minima. A frequency distribution is in this case a particularly suitable variable to characterize the geometric dimensions of a pelletized and/or granulated material, since the statement about the geometric dimensions of individual parts has a low significance and is therefore not particularly suitable as a control variable.
The method according to the invention can be carried out particularly advantageously by the granularity measurement system according to Claim 9. This granularity measurement system has at least one radiation measuring device, at least [lacuna] radiation source and at least one evaluation unit.
In an advantageous refinement of the granularity measurement system, one radiation measuring device is designed as a camera and one radiation source is designed as a light source. In this case, the combination of light source and camera has proven to be particularly advantageous.
Further advantages and inventive details emerge from the following description of an exemplary embodiment, using the drawings and in conjunction with the subclaims. In detail: FIG 1 shows a pelletization plant FIG 2 shows a two-dimensional intensity distribution FIG 3 shows the intensity distribution along the section line A, B from FIG 2 FIG 4 shows the evaluation of the intensity distribution FIG 5 shows a measurement and irradiation arrangement FIG 1 shows a pelletization plant 1 for iron ore.
The mixture of iron ore and bentonite to be pelletized is delivered via a conveyor belt 5 and a material store 6 to a pelletizing S ,7 f 0 P 8571 5 disk 7. The pelletized material is transported away via a further conveyor belt 8. The pelletizing disks 7 are controlled and regulated using a programmable-logic controller 4 (PLC). The aim of this control and regulation is to obtain pellets of a specific size from the iron ore/bentonite mixture. To this end, the pellet size is measured using a measuring unit 2. This measurement can be performed either when the pellets are falling onto the conveyor belt 8 or when they are lying on the conveyor belt 8. The measuring unit 2 comprises electromagnetic radiation sources, preferably three sources distributed uniformly on the circumference of a circle, and a camera. The image supplied by the camera is conditioned and transmitted via a data line 3 to a PC, in particular an industrial PC 4. The evaluation of this transmitted signal is carried out in the PC 4, so that information about the size distribution of the pellets can be ascertained there, this information being necessary for the regulation of the pelletizing disks 7.
As an alternative to the PC, programmable-logic controllers or VME-bus systems may also be used.
FIG 2 shows a two-dimensional intensity distribution. In this case, the pellets stand out as regions of higher light intensity 9. Given multi-dimensional irradiation, for example as a result of irradiation using three light sources arranged uniformly on the circumference of a circle, the curved surface of the pellets results in a different reflection from the individual regions of a pellet. Thus, light is reflected more intensely from the center of the pellet than from the edges.
FIG 3 shows the intensity distribution along the section line A, B from FIG 2. This intensity distribution has minima 12 and maxima 11. The distance between a maxima 11 and its two adjacent minima 12 is proportional to the physical extent of the associated pellet along the section line A, B.
i C 1 P 8571 6- FIG 4 shows the evaluation of the intensity distribution. The image 14 supplied by a camera is firstly digitized in a digital converter 15. The output signal from the digital converter 15 is fed to a lowfrequency filter 16 and an intensity maximum detector 17.
The signals supplied by the low-frequency filter 16 and the intensity maximum detector 17 are further processed in a gradation amplifier 18 in order to emphasize the intensity distribution representing the geometric gradations. The output signal from said gradation amplifier is in turn fed in a function module 19 for pellet dimension calculation. The information obtained in this way is finally evaluated in a statistics module 20 for the statistical conditioning of the information supplied by the function module 19 for pellet dimension calculation.
The output signal 21 from the statistics module 20 is finally a distribution of the frequency of pellets of different sizes.
FIG 5 shows an exemplary embodiment of a particularly beneficial measurement and irradiation arrangement.
In this arrangement, three light sources 15 are distributed uniformly on the circumference of a circle 16. In order to measure the radiation reflected by the irradiated material, use is made of a camera 14, which is arranged at the center of the circle.
A
The claims defining the invention are as follows: 1. Method for determining the geometric dimensions of particles, for example pellets, granules, rocks or grains, of a pelletized and/or granulated material, which is exposed to a radiation, such as electromagnetic radiation, sound or the like, and reflects it, the intensity distribution of the reflected radiation being measured and the geometric dimensions of the particles of the pelletized and/or granulated material being determined from this distribution, characterized in that, in the intensity distribution of the reflected radiation, the intensity maxima and minima and their distance from each other are determined in eight or more directions.
2. Method for determining the geometric dimensions of particles of a pelletized and/or granulated material according to claim 1, wherein the two-dimensional intensity distribution of the reflected radiation is measured and the geometric dimensions of the particles of a pelletized and/or granulated material are determined from this distribution.
3. Method for determining the geometric dimensions of particles of a S pelletized and/or granulated material according to claim 1 or 2, wherein the radiation is preferably light.
4. Method for determining the geometric dimensions of particles of a pelletized and/or granulated material according to claim 1, 2 or 3, wherein the pelletized and/or granulated material is irradiated in a directional manner.
Method for determining the geometric dimensions of particles of a pelletized and/or granulated material according to any one of the preceding claims, wherein the pelletized and/or granulated material is irradiated from at least three [N:\LIBpp100959:BFD
Claims (7)
- 6. Method for determining the geometric dimensions of particles of a pelletized and/or granulated material according to any one of the preceding claims, wherein in the intensity distribution of the reflected radiation, the intensity maxima and minima and their distance from each other are determined, preferably in eight to sixteen directions.
- 7. Method for determining the geometric dimensions of particles of a pelletized and/or granulated material according to any one of the preceding claims, wherein a frequency distribution is ascertained from the distances between intensity maxima and minima.
- 8. Method for determining the geometric dimensions of particles of a pelletized and/or granulated material according to any one of the preceding claims, wherein the frequency distribution of the distances between intensity maxima and minima is used as a frequency distribution of the size of the particles of the pelletized "..and/or granulated material. Granularity measurement system for carrying out the method for determining the geometric dimensions of particles of a pelletized and/or granulated material according to any one of the preceding claims, the granularity measurement system having at least one radiation-measuring device, at least one radiation source and S" 25 at least one evaluation unit, the particles being exposed to a radiation produced by the radiation source and reflecting this radiation, and the radiation-measuring device measuring the intensity distribution of the reflected radiation, characterized in that the evaluation unit is designed to determine, from the intensity distribution of the reflected vN:\LtBpp i959:BFD IO959:B FD radiation, the intensity maxima and minima and their distance from each other in eight or more directions. Granularity measurement system according to Claim 9, wherein one radiation measuring device is designed as a camera and one radiation source is designed as in particular an electromagnetic radiation source.
- 11. Granularity measurement system according to Claim 9 or 10, wherein the evaluation unit is designed as a PC, in particular as an industrial PC.
- 12. Granularity measurement system according to Claim 9 or 10, wherein the evaluation unit is designed as a single-chip computer, for example as a microcontroller, or as a multi-chip computer, in particular as a single-board computer.
- 13. Granularity measurement system according to Claim 9 or 10, wherein the evaluation unit is designed as an automation device, such as, for example, a programmable logic controller or a VME-bus system.
- 14. A method for determining the geometric dimensions of particles substantially as herein described with reference to Figs. 1 to Granularity measurement system substantially as herein described with "reference to Figs. 1 to 25 DATED this Twenty-first Day of December 1998 Siemens Aktiengesellschaft NPWP Toreks Patent Attorneys for the Applicant SPRUSON FERGUSON [N:\LIBpp]00959:BFD P 8571 Abstract Method and system for determining the geometric dimensions of particles of a pelletized and/or granulated material Method for determining the geometric dimensions of particles, for example pellets, granules, rocks or grains, of a pelletized and/or granulated material, which is exposed to a radiation, such as electromagnetic radiation, sound or the like, and reflects it, the intensity distribution of the reflected radiation being measured and the geometric dimensions of the particles of the pelletized and/or granulated material being deter- mined from this distribution. FIG 1
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19536238 | 1995-09-28 | ||
| DE19536238 | 1995-09-28 | ||
| PCT/DE1996/001810 WO1997012222A2 (en) | 1995-09-28 | 1996-09-24 | Method and system for determining the geometric dimensions of particles of a pelletized and/or granulated material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU7619096A AU7619096A (en) | 1997-04-17 |
| AU702574B2 true AU702574B2 (en) | 1999-02-25 |
Family
ID=7773524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU76190/96A Ceased AU702574B2 (en) | 1995-09-28 | 1996-09-24 | Method and system for determining the geometric dimensions of particles of a pelletized and/or granulated material |
Country Status (4)
| Country | Link |
|---|---|
| AU (1) | AU702574B2 (en) |
| DE (1) | DE19680817B4 (en) |
| RU (1) | RU2154814C2 (en) |
| WO (1) | WO1997012222A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011150464A1 (en) * | 2010-06-02 | 2011-12-08 | Technological Resources Pty. Limited | Separating mined material |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2778243B1 (en) * | 1998-04-29 | 2000-06-02 | Cilas | DEVICE FOR DETERMINING THE GRANULOMETRIC DISTRIBUTION OF A MIXTURE OF PARTICLES |
| RU2508534C1 (en) * | 2012-08-13 | 2014-02-27 | Федеральное государственное бюджетное учреждение науки Институт проблем управления им. В.А. Трапезникова Российской академии наук | Device for measurement of dielectric particle geometrical size |
| RU2557330C2 (en) * | 2013-03-19 | 2015-07-20 | Василий Николаевич Круглов | Method to determine geometric sizes of particles of pellet and/or granulate material in loose layer |
| RU2626381C1 (en) * | 2016-09-26 | 2017-07-26 | федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный авиационный технический университет" | System of granulometric analysis of liquid dispersion media |
| RU2677209C1 (en) * | 2017-07-27 | 2019-01-15 | Федеральное казенное предприятие "Государственный научно-исследовательский институт химических продуктов" (ФКП "ГосНИИХП") | Method for assessing the quality of crushing nitrates of cellulose |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5759143A (en) * | 1980-09-26 | 1982-04-09 | Nippon Kokan Kk <Nkk> | Measuring method for grain size of granular material |
| EP0391530B1 (en) * | 1989-04-05 | 1995-05-24 | Nkk Corporation | Method of measuring average particle size of granular material |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2855583C2 (en) * | 1977-12-29 | 1984-07-12 | Sumitomo Metal Industries, Ltd., Osaka | Method for determining the grain size distribution of grain mixtures |
| US4283953A (en) * | 1978-10-30 | 1981-08-18 | Schlumberger Technology Corporation | Method and apparatus for determining a granularity property of a subsurface formation around a borehole |
| EP0198670A3 (en) * | 1985-04-11 | 1989-08-23 | Nippon Steel Corporation | Measurement of sizes of particles in falling state |
| SE504769C2 (en) * | 1994-03-17 | 1997-04-21 | Agrovision Ab | Method and apparatus for automatic assessment of cereals |
| DE4414622A1 (en) * | 1994-04-18 | 1995-10-19 | Marcus Dipl Ing Gutzmer | Soil and earth analysis probe for foreign organic chemical detection |
-
1996
- 1996-09-24 DE DE19680817T patent/DE19680817B4/en not_active Expired - Fee Related
- 1996-09-24 RU RU98107848A patent/RU2154814C2/en active
- 1996-09-24 WO PCT/DE1996/001810 patent/WO1997012222A2/en active Application Filing
- 1996-09-24 AU AU76190/96A patent/AU702574B2/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5759143A (en) * | 1980-09-26 | 1982-04-09 | Nippon Kokan Kk <Nkk> | Measuring method for grain size of granular material |
| EP0391530B1 (en) * | 1989-04-05 | 1995-05-24 | Nkk Corporation | Method of measuring average particle size of granular material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011150464A1 (en) * | 2010-06-02 | 2011-12-08 | Technological Resources Pty. Limited | Separating mined material |
Also Published As
| Publication number | Publication date |
|---|---|
| AU7619096A (en) | 1997-04-17 |
| RU2154814C2 (en) | 2000-08-20 |
| WO1997012222A3 (en) | 1997-06-05 |
| DE19680817B4 (en) | 2011-12-08 |
| WO1997012222A2 (en) | 1997-04-03 |
| DE19680817D2 (en) | 1998-07-23 |
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