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Applications of the theory of fluctuation in the regular transmittance through a dispersion of large cylindrical particles to concentration and size measurements
2008 (Engelska)Ingår i: Applied Optics, ISSN 1559-128X, E-ISSN 2155-3165, Vol. 47, nr 25, s. 4509-4521Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Four measurement principles based on the theory of fluctuation in the regular transmittance through a dispersion of large cylindrical particles are presented. The principles concern the measurement of particle concentration, particle length classes, particle length, and particle width. In previous publications, the measurement principles were briefly presented. A more complete description, experimental demonstrations, and a number of considerations needed to understand the region of validity of the different principles, as well as their uncertainty, are presented. A recently published simulation model [Appl. Opt. 47, 993 (2008)] is used. The basic ideas of the measurement principles within their respective regions of validity are supported.

Ort, förlag, år, upplaga, sidor
2008. Vol. 47, nr 25, s. 4509-4521
Nationell ämneskategori
Produktionsteknik, arbetsvetenskap och ergonomi Atom- och molekylfysik och optik
Identifikatorer
URN: urn:nbn:se:kth:diva-19426ISI: 000259413000006OAI: oai:DiVA.org:kth-19426DiVA, id: diva2:337589
Anmärkning
QC 20100806Tillgänglig från: 2010-08-06 Skapad: 2010-08-06 Senast uppdaterad: 2017-12-12Bibliografiskt granskad
Ingår i avhandling
1. Particle Measurements Using Fluctuations in the Regular Transmittance of Light Through a Particle Dispersion: Concentration and Particles size - Theory, Measurement Principles and Applications for Pulp and Paper Production
Öppna denna publikation i ny flik eller fönster >>Particle Measurements Using Fluctuations in the Regular Transmittance of Light Through a Particle Dispersion: Concentration and Particles size - Theory, Measurement Principles and Applications for Pulp and Paper Production
2009 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The regular transmittance of light or similar radiation through a flowing suspension of particles fluctuates because of the random occurrence of particles in the beam.In the work presented here, a theory for this fluctuating behaviour with the emphasison dispersions of mm-length slender cylindrical particles having circular crosssections is given. The particles in question are wood pulp fibres, which as a first approximation are considered to have a cylinder shape. Four possible measurementprinciples are described theoretically and experimentally. The four principles are for the measurement of concentration, length distribution characterized as lengthclasses, mean length, and mean width. The usefulness in industrial process monitoring of two of these principles is exemplified with pulp measurements. In order to estimate model errors, numerical simulations were used. Although other techniques such as image analysis may compete, the technique presented here is attractive because of the simplicity of the measurement device used.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH, 2009. s. xxv, 111
Serie
Trita-IIP, ISSN 1650-1888 ; 09:05
Nyckelord
Particle concentration, Particle size, Cylindrical particles, Large particles, Cellulose fibres, Wood pulp fibres, Suspensions, Particle length, Particle length distribution, Particle width
Nationell ämneskategori
Produktionsteknik, arbetsvetenskap och ergonomi
Identifikatorer
urn:nbn:se:kth:diva-10639 (URN)978-91-7415-254-8 (ISBN)
Disputation
2009-06-15, Sal M311, KTH, Brinellvägen 68,, Stockholm, 10:00 (Engelska)
Opponent
Handledare
Anmärkning
QC 20100806Tillgänglig från: 2009-06-09 Skapad: 2009-06-09 Senast uppdaterad: 2010-08-06Bibliografiskt granskad

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Applied Optics
Produktionsteknik, arbetsvetenskap och ergonomiAtom- och molekylfysik och optik

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