CA2412617A1 - Wood chip singulation system for in-process monitoring and control - Google Patents
Wood chip singulation system for in-process monitoring and control Download PDFInfo
- Publication number
- CA2412617A1 CA2412617A1 CA 2412617 CA2412617A CA2412617A1 CA 2412617 A1 CA2412617 A1 CA 2412617A1 CA 2412617 CA2412617 CA 2412617 CA 2412617 A CA2412617 A CA 2412617A CA 2412617 A1 CA2412617 A1 CA 2412617A1
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- Prior art keywords
- wood
- wood chip
- conveyor
- chips
- wood chips
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- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/04—Sorting according to size
- B07C5/12—Sorting according to size characterised by the application to particular articles, not otherwise provided for
- B07C5/14—Sorting timber or logs, e.g. tree trunks, beams, planks or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/02—Measures preceding sorting, e.g. arranging articles in a stream orientating
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Forests & Forestry (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
This invention relates to a novel wood chip singulation system for in-process monitoring and control. More particularly, this invention pertains to an apparatus and method for the selection and presentation to a detection device of a representa-tive sample of successive individual wood chips of a desired size profile from a conveyor carrying a single, or multiple layer bulk of various sized wood chips. A
wood chip singulation system for in-process monitoring and control comprising:
(a) a bulk wood chip conveyor; (b) a screener which separates wood chips conveyed to the screener by the conveyor according to wood chip size; (c) a second conveyor which conveys some of the chips from the screener to a sensor array; (d) a sensor array which senses wood chips on the second conveyor and isolates individual chips; (e) a sweeper which, upon demand of the sensor array, diverts unwanted wood chips off the second conveyor; (f) a wood chip sorter which upon command from the sensor array moves a single chip into position for analysis by a wood chip detector; and (g) a detector which analyzes physical characteristics of the single wood chip.
wood chip singulation system for in-process monitoring and control comprising:
(a) a bulk wood chip conveyor; (b) a screener which separates wood chips conveyed to the screener by the conveyor according to wood chip size; (c) a second conveyor which conveys some of the chips from the screener to a sensor array; (d) a sensor array which senses wood chips on the second conveyor and isolates individual chips; (e) a sweeper which, upon demand of the sensor array, diverts unwanted wood chips off the second conveyor; (f) a wood chip sorter which upon command from the sensor array moves a single chip into position for analysis by a wood chip detector; and (g) a detector which analyzes physical characteristics of the single wood chip.
Description
WOOD CHIP SINGLTLATION SYSTEM FOR
IN-PROCESS MONITORING AND CONTROL
FIELD OR THE INVENTION
This invention relates to a novel wood chip singulation system for in-process monitoring and control. More particularly, this invention pertains to an apparatus and method for the selection and presentation to a detection device of a representa-tive sample of successive individual wood chips of a desired size profile from a conveyor carrying a single, or multiple layer bulk of various sized wood chips.
BACKGROUND OF THE INVENTION
In the pulp and paper industry, there is an economic benefit to knowing the species and moisture content of the wood chips that are fed into the pulp digesters.
Taking grab samples from the digester feed and analyzing them manually is not practical since the process is dynamic and ongoing. The number of manually obtained samples that would be required to provide a statistically significant representation of the bulk is simply not practical. Having the ability to analyze wood chips in-process would make it possible to adjust the digestion parameters of heat and chemical additives in accordance to the makeup of the wood chip sample stream and maximize process efficiency. A system to automatically select represen-tative single chip samples from the bulk of wood chips from a moving conveyor would allow the presentation of-individual chips to a detector with on-line feedback to the process control of the digester system.
U.S. Patent No. 6,447,639 BI, Warren et al., granted September 10, 2002, discloses one design of on-line measurement and control. The system employs real time measurements from ion mobility spectrometry to automatically rapidly and continuously determine the physical and chemical characteristics of wood chip feedstock being fed into a pulp digester and thereby maximize process efficiencies, minimize chemical and energy consumption and improve product uniformity. The intelligent control system utilizes the moisture content and species of wood chips on-line in a pulping process and comprises conveyingwood chips from a wood chip storage facility to a digester; scanning the wood chips as they are conveyed to determine their species and moisture content by heating the wood chips and sensing the moisture content and characterizing the species of,the wood chips by species signatures obtained by an ion mobility spectrometer; and regulating steam flow and chemicals supplied to the digester according to the moisture content and the charac-terization of the wood chip species.
The following are some of the publications which are relevant to the area of detecting wood species on-line by ion mobility spectrometry:
~ A. H. Lawrence, Rapid Characterization of Wood Species by Ion Mobility Spectrometry, 75'° Annual Meeting of Technical Section of Canadian Pulp and Paper Association, Feb. 2, 1989.
~ A. H. Lawrence, et al. , Identification of Wood Species by Ion Mobility Spectrometry, Anal. Chem. 1991, 63, 1217-1221.
~ Roger C. Petterson, et al. , Detection of Northern Red Oak Wetwood by Fast Heating and Ion Mobility Spectrometric Analysis, Holzforschung, 47 (1993) 513.522.
~ John R. Obst. Analytical Pyrolysis of Hardwood and Softwood Lignins and its Use in Lignin-Type Determination of Hardwood Vessel Elements, Forest Products Laboratory, Forest Service, U.S. Dept. of Agriculture, Madison, Wisconsin 53705.
~ A.J. Panshin & Garl de Zeeuw, Textbook of Wood Technology, 3 ~' ed. , vol. l, McGraw-Hill, New York, pp. 419-421.
SUMMARY OF INVENTION
The invention is directed to a wood chip singulation apparatus for in-process monitoring and control of a bulk wood chip feed comprising: (a) a first bulk wood chip conveyor which conveys bulk wood chips to a screener; (b) a screener which separates wood chips conveyed to the screener by the conveyor according to wood chip size; (c) a second conveyor which conveys some of the separated wood chips from the screener to a sensor array; (d) a sensor array which senses the presence of wood chips on the second conveyor and identifies individual chips; (e) a sweeper which, upon demand of the sensor array, diverts unwanted wood chips off the second conveyor; (fj a wood chip mover which upon command from the sensor array moves a sensed single wood chip into position for analysis by a wood chip detector; and (g) a wood chip detector which analyzes physical characteristics of the single wood chip.
The sized wood chips from the screener can travel along a chute to the second conveyor. The sweeper can be a blade which upon command from the sensor array, can divert wood chips from the second conveyor, and upon second command from-the sensor array, can move aside to permit a wood chip on the second conveyor to pass the blade.
The wood chip mover can be a multiple blade paddle wheel. The wood chip singulation apparatus can include a piston which can move a single wood chip from the paddle wheel to the detector; upon command from the sensor array.
The exit chute from the screener can be of a wid h wider than the width of the second conveyor so that only a selected number of wood chips on the exit chute are conveyed by the second conveyor.
The invention also pertains to a method of singulating wood chips for in-process monitoring and control comprising: (a) sorting bulk wood chips of various sizes to select a plurality of wood chips of a specified size; (b) sensing the plurality of select size wood chips to select individual wood chips; and (c) assessing the selected individual wood chips to determine physical characteristics of the individual wood chip.
The selected individual wood chips can be characterized according to the species of wood chips by species signatures obtained by conducting an ion mobility spectral analysis on the individual wood chips. The individual wood chips can be assessed according to moisture content.
BRIEF DESCRIPTION OF DRAWINCrS
In drawings which illustrate specific embodiments of the invention, but which should not be construed as restricting the spirit or scope of the invention in any way:
Figure 1 illustrates a schematic depiction of a wood chip singulation system for in process monitoring and control.
IN-PROCESS MONITORING AND CONTROL
FIELD OR THE INVENTION
This invention relates to a novel wood chip singulation system for in-process monitoring and control. More particularly, this invention pertains to an apparatus and method for the selection and presentation to a detection device of a representa-tive sample of successive individual wood chips of a desired size profile from a conveyor carrying a single, or multiple layer bulk of various sized wood chips.
BACKGROUND OF THE INVENTION
In the pulp and paper industry, there is an economic benefit to knowing the species and moisture content of the wood chips that are fed into the pulp digesters.
Taking grab samples from the digester feed and analyzing them manually is not practical since the process is dynamic and ongoing. The number of manually obtained samples that would be required to provide a statistically significant representation of the bulk is simply not practical. Having the ability to analyze wood chips in-process would make it possible to adjust the digestion parameters of heat and chemical additives in accordance to the makeup of the wood chip sample stream and maximize process efficiency. A system to automatically select represen-tative single chip samples from the bulk of wood chips from a moving conveyor would allow the presentation of-individual chips to a detector with on-line feedback to the process control of the digester system.
U.S. Patent No. 6,447,639 BI, Warren et al., granted September 10, 2002, discloses one design of on-line measurement and control. The system employs real time measurements from ion mobility spectrometry to automatically rapidly and continuously determine the physical and chemical characteristics of wood chip feedstock being fed into a pulp digester and thereby maximize process efficiencies, minimize chemical and energy consumption and improve product uniformity. The intelligent control system utilizes the moisture content and species of wood chips on-line in a pulping process and comprises conveyingwood chips from a wood chip storage facility to a digester; scanning the wood chips as they are conveyed to determine their species and moisture content by heating the wood chips and sensing the moisture content and characterizing the species of,the wood chips by species signatures obtained by an ion mobility spectrometer; and regulating steam flow and chemicals supplied to the digester according to the moisture content and the charac-terization of the wood chip species.
The following are some of the publications which are relevant to the area of detecting wood species on-line by ion mobility spectrometry:
~ A. H. Lawrence, Rapid Characterization of Wood Species by Ion Mobility Spectrometry, 75'° Annual Meeting of Technical Section of Canadian Pulp and Paper Association, Feb. 2, 1989.
~ A. H. Lawrence, et al. , Identification of Wood Species by Ion Mobility Spectrometry, Anal. Chem. 1991, 63, 1217-1221.
~ Roger C. Petterson, et al. , Detection of Northern Red Oak Wetwood by Fast Heating and Ion Mobility Spectrometric Analysis, Holzforschung, 47 (1993) 513.522.
~ John R. Obst. Analytical Pyrolysis of Hardwood and Softwood Lignins and its Use in Lignin-Type Determination of Hardwood Vessel Elements, Forest Products Laboratory, Forest Service, U.S. Dept. of Agriculture, Madison, Wisconsin 53705.
~ A.J. Panshin & Garl de Zeeuw, Textbook of Wood Technology, 3 ~' ed. , vol. l, McGraw-Hill, New York, pp. 419-421.
SUMMARY OF INVENTION
The invention is directed to a wood chip singulation apparatus for in-process monitoring and control of a bulk wood chip feed comprising: (a) a first bulk wood chip conveyor which conveys bulk wood chips to a screener; (b) a screener which separates wood chips conveyed to the screener by the conveyor according to wood chip size; (c) a second conveyor which conveys some of the separated wood chips from the screener to a sensor array; (d) a sensor array which senses the presence of wood chips on the second conveyor and identifies individual chips; (e) a sweeper which, upon demand of the sensor array, diverts unwanted wood chips off the second conveyor; (fj a wood chip mover which upon command from the sensor array moves a sensed single wood chip into position for analysis by a wood chip detector; and (g) a wood chip detector which analyzes physical characteristics of the single wood chip.
The sized wood chips from the screener can travel along a chute to the second conveyor. The sweeper can be a blade which upon command from the sensor array, can divert wood chips from the second conveyor, and upon second command from-the sensor array, can move aside to permit a wood chip on the second conveyor to pass the blade.
The wood chip mover can be a multiple blade paddle wheel. The wood chip singulation apparatus can include a piston which can move a single wood chip from the paddle wheel to the detector; upon command from the sensor array.
The exit chute from the screener can be of a wid h wider than the width of the second conveyor so that only a selected number of wood chips on the exit chute are conveyed by the second conveyor.
The invention also pertains to a method of singulating wood chips for in-process monitoring and control comprising: (a) sorting bulk wood chips of various sizes to select a plurality of wood chips of a specified size; (b) sensing the plurality of select size wood chips to select individual wood chips; and (c) assessing the selected individual wood chips to determine physical characteristics of the individual wood chip.
The selected individual wood chips can be characterized according to the species of wood chips by species signatures obtained by conducting an ion mobility spectral analysis on the individual wood chips. The individual wood chips can be assessed according to moisture content.
BRIEF DESCRIPTION OF DRAWINCrS
In drawings which illustrate specific embodiments of the invention, but which should not be construed as restricting the spirit or scope of the invention in any way:
Figure 1 illustrates a schematic depiction of a wood chip singulation system for in process monitoring and control.
4 _ DETAILED DESCRIPTION OF SPECIFIC
EMBODIMENTS OF THE INVENTION
Throughout the following description specific details are set forth in order to provide a more thorough understanding of the invention. However, the invention may be practiced without these particulars. In other instances, well known elements have not been shown or described in detail to avoid unnecessarily obscuring the present invention. Accordingly, the specification and drawings are to be regarded in an illustrative, rather than a restrictive, sense.
The process according to the invention allows the automatic selection of individual wood chips from a bulk conveyor of chips. In addition, the chips are selected based on a range of physical size that is appropriate for presentation to a detector. This solves the problem of obtaining in-process representative successive single chip samples of the bulk wood chips appropriate 'for presentation to a detector so the wood chips can be analyzed and the data used for process control.
Figure 1 illustrates a schematic depiction of a wood chip singulation system and apparatus for in-process monitoring and control. As seen in Figure l, bulk wood chips on a bulk conveyor 2 flow into a screener 4. The screener 4 separates the chips according to their physical size. Wood chips 8 within a prescribed desired size range exit from the screener 4 and fall down a chute 6. A portion of the chips 8 that fall from chute 6 drop onto a narrow conveyor 10 and are separated in the direction of belt travel by their rate of exiting the screener 4. This separation can be adjusted by adjusting the wood chip feed rate from the bulk conveyor 2 to the screener 4. The width of the sample conveyor 10, which is narrower than the width of the chute 6, selects a portion of the available chips 8 and the excess chips 12 fall away. A sensor array 14 coupled with a microprocessor monitors the distribution of the chips 16 on the sample conveyor 10 and this data is used to control a sweeper 18. If the sensor array 14 determines that the wood chips 16 are not separated along the conveyor belt 10, the sweeper 18 swings into position across the conveyor belt 10 at an angle as shown in Figue 1, thereby directing the chips 16 off the conveyor belt 10 as shown at position 20. The sweeper 18 also sweeps chips 16 off the conveyor belt 10 when the paddle wheel 22 is not ready to receive another chip. When the sensor array 14 detects a single chip 16 on the belt 10 and the paddle wheel 22 is ready to receive the chip, the sweeper 18 is instructed to move aside and this permits a single chip to pass to position 24. The sweeper then moves back into position on belt 10, thereby diverting the following chips 20 off the sample conveyor belt 10. When the single chip 24 reaches the paddle wheel 22, it is rotated into position 26 for sampling by the detector 28 by the paddle wheel 22 being instructed to sweep the chip 24 around 180° to position 26, which is appropriate for presentation to the detector 28. As one :embodiment of the inven-tion, the sample 26 may be moved into the detector 28 by a piston 30, but the invention is not limited to this method. The piston 30 and detector 28 are conven-tional and are not part of the invention. Once the chip 26 is sampled by the detector 28, the paddle wheel 22 rotates another 90° to remove the sampled chip 26 so it drops away at position 32. The paddle wheel 22 then rotates another 90°
so as to move the next chip 24 into position 26 for analysis by the detector 28. As an alternative embodiment of the invention, there may be a chip ready in position at 24 and also at position 34 at another point of the paddle wheel 22 and the paddle wheel 22 may turn in 90° increments to move successive chips into position for the detector 28.
As will be apparent to those skilled in the art in the light of the foregoing disclosure, many alterations and modifications are possible in the practice of this invention without departing from the scope thereof. Accordingly, the scope of the invention is to be construed in accordance with the substance defined by the following claims.
EMBODIMENTS OF THE INVENTION
Throughout the following description specific details are set forth in order to provide a more thorough understanding of the invention. However, the invention may be practiced without these particulars. In other instances, well known elements have not been shown or described in detail to avoid unnecessarily obscuring the present invention. Accordingly, the specification and drawings are to be regarded in an illustrative, rather than a restrictive, sense.
The process according to the invention allows the automatic selection of individual wood chips from a bulk conveyor of chips. In addition, the chips are selected based on a range of physical size that is appropriate for presentation to a detector. This solves the problem of obtaining in-process representative successive single chip samples of the bulk wood chips appropriate 'for presentation to a detector so the wood chips can be analyzed and the data used for process control.
Figure 1 illustrates a schematic depiction of a wood chip singulation system and apparatus for in-process monitoring and control. As seen in Figure l, bulk wood chips on a bulk conveyor 2 flow into a screener 4. The screener 4 separates the chips according to their physical size. Wood chips 8 within a prescribed desired size range exit from the screener 4 and fall down a chute 6. A portion of the chips 8 that fall from chute 6 drop onto a narrow conveyor 10 and are separated in the direction of belt travel by their rate of exiting the screener 4. This separation can be adjusted by adjusting the wood chip feed rate from the bulk conveyor 2 to the screener 4. The width of the sample conveyor 10, which is narrower than the width of the chute 6, selects a portion of the available chips 8 and the excess chips 12 fall away. A sensor array 14 coupled with a microprocessor monitors the distribution of the chips 16 on the sample conveyor 10 and this data is used to control a sweeper 18. If the sensor array 14 determines that the wood chips 16 are not separated along the conveyor belt 10, the sweeper 18 swings into position across the conveyor belt 10 at an angle as shown in Figue 1, thereby directing the chips 16 off the conveyor belt 10 as shown at position 20. The sweeper 18 also sweeps chips 16 off the conveyor belt 10 when the paddle wheel 22 is not ready to receive another chip. When the sensor array 14 detects a single chip 16 on the belt 10 and the paddle wheel 22 is ready to receive the chip, the sweeper 18 is instructed to move aside and this permits a single chip to pass to position 24. The sweeper then moves back into position on belt 10, thereby diverting the following chips 20 off the sample conveyor belt 10. When the single chip 24 reaches the paddle wheel 22, it is rotated into position 26 for sampling by the detector 28 by the paddle wheel 22 being instructed to sweep the chip 24 around 180° to position 26, which is appropriate for presentation to the detector 28. As one :embodiment of the inven-tion, the sample 26 may be moved into the detector 28 by a piston 30, but the invention is not limited to this method. The piston 30 and detector 28 are conven-tional and are not part of the invention. Once the chip 26 is sampled by the detector 28, the paddle wheel 22 rotates another 90° to remove the sampled chip 26 so it drops away at position 32. The paddle wheel 22 then rotates another 90°
so as to move the next chip 24 into position 26 for analysis by the detector 28. As an alternative embodiment of the invention, there may be a chip ready in position at 24 and also at position 34 at another point of the paddle wheel 22 and the paddle wheel 22 may turn in 90° increments to move successive chips into position for the detector 28.
As will be apparent to those skilled in the art in the light of the foregoing disclosure, many alterations and modifications are possible in the practice of this invention without departing from the scope thereof. Accordingly, the scope of the invention is to be construed in accordance with the substance defined by the following claims.
Claims (9)
1. A wood chip singulation apparatus for in-process monitoring and control of a bulk wood chip feed comprising:
(a) a first bulk wood chip conveyor which conveys bulk wood chips to a screener;
(b) a screener which separates wood chips conveyed to the screener by the conveyor according to wood chip size;
(c) a second conveyor which conveys some of the separated wood chips from the screener to a sensor array;
(d) a sensor array which senses the presence of wood chips on the second conveyor and identifies individual chips;
(e) a sweeper which, upon demand of the sensor array, diverts unwanted wood chips off the second conveyor;
(f) a wood chip mover which upon command from the sensor array moves a sensed single wood chip into position for analysis by a wood chip detector;
and (g) a wood chip detector which analyzes physical characteristics of the single wood chip.
(a) a first bulk wood chip conveyor which conveys bulk wood chips to a screener;
(b) a screener which separates wood chips conveyed to the screener by the conveyor according to wood chip size;
(c) a second conveyor which conveys some of the separated wood chips from the screener to a sensor array;
(d) a sensor array which senses the presence of wood chips on the second conveyor and identifies individual chips;
(e) a sweeper which, upon demand of the sensor array, diverts unwanted wood chips off the second conveyor;
(f) a wood chip mover which upon command from the sensor array moves a sensed single wood chip into position for analysis by a wood chip detector;
and (g) a wood chip detector which analyzes physical characteristics of the single wood chip.
2. A wood chip singulation apparatus as claimed in claim 1 wherein the sized wood chips from the screener travel along a chute to the second conveyor.
3. A wood chip singulation apparatus as claimed in claim 1 wherein the sweeper is a blade which upon command from the sensor array, diverts wood chips from the second conveyor; and upon second command from the sensor array, moves aside to permit a wood chip on the second conveyor to pass the blade.
4. A wood chip singulation apparatus as claimed in claim 1 wherein the wood chip mover is a multiple blade paddle wheel.
5. A wood chip singulation apparatus as claimed in claim 4 including a piston which moves a single wood chip from the paddle wheel to the detector, upon command from the sensor array.
6. A wood chip singulation apparatus as claimed in claim 1 wherein the exit chute from the screener is of a width wider than the width of the second conveyor so that only a selected number of wood chips on the exit chute are conveyed by the second conveyor.
7. A method of singulating wood chips for in-process monitoring and control comprising:
(a) sorting bulk wood chips of various sizes to select a plurality of wood chips of a specified size;
(b) sensing the plurality of select size wood chips to select individual wood chips; and (c) assessing the selected individual wood chips to determine physical characteristics of the individual wood chip.
(a) sorting bulk wood chips of various sizes to select a plurality of wood chips of a specified size;
(b) sensing the plurality of select size wood chips to select individual wood chips; and (c) assessing the selected individual wood chips to determine physical characteristics of the individual wood chip.
8. A method as claimed in claim 7 wherein the selected individual wood chips are characterized according to the species of wood chips by species signatures obtained by conducting anion mobility spectral analysis on the individual wood chips.
9. A method as claimed in claim 8 wherein the individual wood chips are assessed according to moisture content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2412617 CA2412617A1 (en) | 2002-11-22 | 2002-11-22 | Wood chip singulation system for in-process monitoring and control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2412617 CA2412617A1 (en) | 2002-11-22 | 2002-11-22 | Wood chip singulation system for in-process monitoring and control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2412617A1 true CA2412617A1 (en) | 2004-05-22 |
Family
ID=32476957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2412617 Abandoned CA2412617A1 (en) | 2002-11-22 | 2002-11-22 | Wood chip singulation system for in-process monitoring and control |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2412617A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3315216A1 (en) * | 2016-10-28 | 2018-05-02 | Metso Sweden Ab | Detection system |
-
2002
- 2002-11-22 CA CA 2412617 patent/CA2412617A1/en not_active Abandoned
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3315216A1 (en) * | 2016-10-28 | 2018-05-02 | Metso Sweden Ab | Detection system |
| WO2018078125A1 (en) * | 2016-10-28 | 2018-05-03 | Metso Sweden Ab | Detection system |
| CN110022998A (en) * | 2016-10-28 | 2019-07-16 | 美卓（瑞典）公司 | Detection system |
| CN110022998B (en) * | 2016-10-28 | 2021-06-01 | 美卓（瑞典）公司 | Detection system |
| US11224897B2 (en) | 2016-10-28 | 2022-01-18 | Metso Sweden Ab | Detection system |
| US20220088640A1 (en) * | 2016-10-28 | 2022-03-24 | Metso Sweden Ab | Detection system |
| AU2017348626B2 (en) * | 2016-10-28 | 2022-04-21 | Metso Outotec Finland Oy | Detection system |
| US11731166B2 (en) | 2016-10-28 | 2023-08-22 | Metso Sweden Ab | Detection system |
| AU2022202144B2 (en) * | 2016-10-28 | 2024-02-01 | Metso Sweden Ab | Detection system |
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