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Titolo:
Acoustic computer tomographic pyrometry for two-dimensional measurement ofgases taking into account the effect of refraction of sound wave paths
Autore:
Lu, J; Wakai, K; Takahashi, S; Shimizu, S;
Indirizzi:
Gifu Univ, Grad Sch Engn, Gifu 5011193, Japan Gifu Univ Gifu Japan 5011193 fu Univ, Grad Sch Engn, Gifu 5011193, Japan Gifu Univ, Dept Mech Engn, Gifu 5011193, Japan Gifu Univ Gifu Japan 5011193 u Univ, Dept Mech Engn, Gifu 5011193, Japan Meijo Univ, Dept Mech Engn, Nagoya, Aichi 4908502, Japan Meijo Univ Nagoya Aichi Japan 4908502 Engn, Nagoya, Aichi 4908502, Japan
Titolo Testata:
MEASUREMENT SCIENCE & TECHNOLOGY
fascicolo: 6, volume: 11, anno: 2000,
pagine: 692 - 697
SICI:
0957-0233(200006)11:6<692:ACTPFT>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Keywords:
gas temperature; sound wave velocity; transit time; least-square method; calculus of variations; computer tomography; furnace; combustion diagnostics;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
8
Recensione:
Indirizzi per estratti:
Indirizzo: Lu, J Gifu Univ, Grad Sch Engn, Gifu 5011193, Japan Gifu Univ Gifu Japan5011193 v, Grad Sch Engn, Gifu 5011193, Japan
Citazione:
J. Lu et al., "Acoustic computer tomographic pyrometry for two-dimensional measurement ofgases taking into account the effect of refraction of sound wave paths", MEAS SCI T, 11(6), 2000, pp. 692-697

Abstract

The algorithm which takes into account the effect of refraction of sound wave paths for acoustic computer tomography (CT) is developed. Incorporatingthe algorithm of refraction into ordinary CT algorithms which are based onFourier transformation is very difficult. In this paper, the least-squaresmethod, which is capable of considering the refraction effect, is employedto reconstruct the two-dimensional temperature distribution. The refraction effect is solved by writing a set of differential equations which is derived from Fermat's theorem and the calculus of variations. It is impossible to carry out refraction analysis and the reconstruction of temperature distribution simultaneously, so the problem is solved using the iteration method. The measurement field is assumed to take the shape of a circle and 16 speakers, also serving as the receivers, are set around it isometrically. Thealgorithm is checked through computer simulation with various kinds of temperature distributions. It is shown that the present method which takes into account the algorithm of the refraction effect can reconstruct temperature distributions with much greater accuracy than can methods which do not include the refraction effect.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/03/20 alle ore 22:41:53