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Larsson, John Erik
Publications (6 of 6) Show all publications
Thurley, M., Andersson, T., Marklund, O. & Larsson, J. E. (2008). Projekt: 3D Mätning Projekt. Paper presented at .
Open this publication in new window or tab >>Projekt: 3D Mätning Projekt
2008 (English)Other (Other (popular science, discussion, etc.))
Abstract [en]

This project developed an industrial prototype 3D imaging and analysis system for measuring the size distribution of iron ore green pellets. The system is installed and operational at a pellet production plant capturing and analysising 3D surface data of piled pellets on the conveyor belt. It provides fast, frequent, non-contact, consistent measurement of the pellet sieve size distribution and opens the door to autonomous closed loop control of the pellet balling disk or drum in the future. Segmentation methods based on morphological image processing are applied to the 3D surface data to identify individual pellets. Determination of entirely visible pellets (non-overlapped) is made using a two feature classification strategy, the advantage being that this system eliminates the bias the results from sizing overlapped particles based on their limited visible profile. The system achieves what a number of commercial 2D fragmentation measurement systems could not satisfactorily achieve for the pellet producer, that is, accurate sizing of the green pellets.

National Category
Signal Processing
Research subject
Signal Processing
Identifiers
urn:nbn:se:ltu:diva-36102 (URN)6a983657-28d8-4405-85c9-4c84a169bbcf (Local ID)6a983657-28d8-4405-85c9-4c84a169bbcf (Archive number)6a983657-28d8-4405-85c9-4c84a169bbcf (OAI)
Note

Publikationer: On-line 3D surface measurement of iron ore green pellets; Pellet size estimation using spherical fitting; Identification and sizing of the entirely visible rocks from a 3D surface data segmentation of laboratory rock piles; Visibility classification of pellets in piles for sizing without overlapped particle error; An industrial 3D vision system for size measurement of iron ore green pellets using morphological image segmentation; Status: Ended; Period: 17/12/2010 → …

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Larsson, J. E., Gustafsson, T. & Rönnbäck, S. (1998). Paper machine dry line position control (ed.). In: (Ed.), (Ed.), Reglermöte '98: preprints. Paper presented at Reglermöte 1998 : 11/06/1998 - 12/06/1998 (pp. 168-172). Lund: Reglerteknik, Lunds tekniska högskola
Open this publication in new window or tab >>Paper machine dry line position control
1998 (English)In: Reglermöte '98: preprints, Lund: Reglerteknik, Lunds tekniska högskola , 1998, p. 168-172Conference paper, Published paper (Other academic)
Place, publisher, year, edition, pages
Lund: Reglerteknik, Lunds tekniska högskola, 1998
National Category
Control Engineering
Research subject
Control Engineering
Identifiers
urn:nbn:se:ltu:diva-30550 (URN)466fdc50-d14b-11db-a0b9-000ea68e967b (Local ID)466fdc50-d14b-11db-a0b9-000ea68e967b (Archive number)466fdc50-d14b-11db-a0b9-000ea68e967b (OAI)
Conference
Reglermöte 1998 : 11/06/1998 - 12/06/1998
Note
Godkänd; 1998; 20061031 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Larsson, J. E. & Gustafsson, T. (1998). Paper machine dry line position control during grade changes (ed.). In: (Ed.), (Ed.), Proceedings of the 1998 American Control Conference: ACC, June 24 - 26, 1998, Philadelphia, Pennsylvania, USA. Paper presented at American Control Conference : 24/06/1998 - 26/06/1998 (pp. 2997-3001). Piscataway, NJ: IEEE Communications Society
Open this publication in new window or tab >>Paper machine dry line position control during grade changes
1998 (English)In: Proceedings of the 1998 American Control Conference: ACC, June 24 - 26, 1998, Philadelphia, Pennsylvania, USA, Piscataway, NJ: IEEE Communications Society, 1998, p. 2997-3001Conference paper, Published paper (Refereed)
Abstract [en]

The detection and control of the dry line machine direction position on a fourdrinier paper machine are considered. The dry line position is detected using a digital image processing system consisting of a CCD camera, a frame grabber and a standard PC. The system was installed on a kraft liner machine and both open loop and closed loop experiments were performed with encouraging results. The introduction of automatic control of the dry line position reduces the time for grade changes and it also reduces the machine operators work load. The reduced time leads to smaller production losses and hence to economical benefits.

Place, publisher, year, edition, pages
Piscataway, NJ: IEEE Communications Society, 1998
National Category
Control Engineering
Research subject
Control Engineering
Identifiers
urn:nbn:se:ltu:diva-35732 (URN)10.1109/ACC.1998.688407 (DOI)2-s2.0-84881322548 (Scopus ID)a641db50-6775-11db-8cbe-000ea68e967b (Local ID)0-7803-4530-4 (ISBN)a641db50-6775-11db-8cbe-000ea68e967b (Archive number)a641db50-6775-11db-8cbe-000ea68e967b (OAI)
Conference
American Control Conference : 24/06/1998 - 26/06/1998
Note
Godkänd; 1998; 20061029 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-07-10Bibliographically approved
Larsson, J. E., Gustafsson, T. & Rönnbäck, S. (1998). Paper machine dry line positioning system (ed.). In: (Ed.), (Ed.), Proceedings of Control Systems 98: . Paper presented at Control Systems '98 : 01/09/1998 - 03/09/1998 (pp. 355-362). : Finnish Society of Automation
Open this publication in new window or tab >>Paper machine dry line positioning system
1998 (English)In: Proceedings of Control Systems 98, Finnish Society of Automation , 1998, p. 355-362Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Finnish Society of Automation, 1998
National Category
Control Engineering
Research subject
Control Engineering
Identifiers
urn:nbn:se:ltu:diva-39677 (URN)e841f270-d14b-11db-a0b9-000ea68e967b (Local ID)e841f270-d14b-11db-a0b9-000ea68e967b (Archive number)e841f270-d14b-11db-a0b9-000ea68e967b (OAI)
Conference
Control Systems '98 : 01/09/1998 - 03/09/1998
Note
Godkänd; 1998; 20061031 (ysko)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-11-25Bibliographically approved
Larsson, J. E. (1997). On paper machine headbox control (ed.). (Licentiate dissertation). Paper presented at . Luleå: Luleå tekniska universitet
Open this publication in new window or tab >>On paper machine headbox control
1997 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 1997. p. 78
Series
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757 ; 1997:38
National Category
Control Engineering
Research subject
Control Engineering
Identifiers
urn:nbn:se:ltu:diva-17319 (URN)2d4d9640-ed8e-11db-bb5c-000ea68e967b (Local ID)2d4d9640-ed8e-11db-bb5c-000ea68e967b (Archive number)2d4d9640-ed8e-11db-bb5c-000ea68e967b (OAI)
Note

Godkänd; 1997; 20070418 (ysko)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Norlander, T., Larsson, J. E. & Vidgren, L. (1996). Headbox ste point correction using a laser based velocity meter (ed.). In: (Ed.), (Ed.), Reglermöte '96: [preprints]. Paper presented at Reglermöte 1996 : 06/06/1996 - 07/06/1996 (pp. 137-142). Luleå: Högskolan i Luleå
Open this publication in new window or tab >>Headbox ste point correction using a laser based velocity meter
1996 (English)In: Reglermöte '96: [preprints], Luleå: Högskolan i Luleå , 1996, p. 137-142Conference paper, Published paper (Other academic)
Place, publisher, year, edition, pages
Luleå: Högskolan i Luleå, 1996
National Category
Control Engineering
Research subject
Control Engineering
Identifiers
urn:nbn:se:ltu:diva-38143 (URN)c71ec020-bb07-11de-b769-000ea68e967b (Local ID)c71ec020-bb07-11de-b769-000ea68e967b (Archive number)c71ec020-bb07-11de-b769-000ea68e967b (OAI)
Conference
Reglermöte 1996 : 06/06/1996 - 07/06/1996
Note
Godkänd; 1996; 20091017 (andbra)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-11-25Bibliographically approved

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