Home Books eBooks Journals References & Proceedings Authors, Editors, Reviewers A-Z Product Index Awards
Transport Phenomena in Thermal Engineering. Volume 2

ISBN:
1-56700-015-0 (Print)

IMAGE ANALYSIS WITH SPATIAL FILTERING METHOD FOR THE VELOCITY OF DROPPING PARTICLES IN THE AIR

Y. Katoh
Department of Mechanical Engineering, Yamaguchi University Tokiwadai, Ube 755, Japan

Masahide Miyamoto
Department of Mechanical Engineering, Yamaguchi University Tokiwadai, Ube 755, Japan

S. Kaneko
Department of Mechanical Engineering, Faculty of Engineering, Yamaguchi University, 2557 Tokiwadai, Ube City 755, JAPAN

H. Miike
Department of Mechanical Engineering, Faculty of Engineering, Yamaguchi University, 2557 Tokiwadai, Ube City 755, JAPAN

K. Koga
Department of Mechanical Engineering, Faculty of Engineering, Yamaguchi University, 2557 Tokiwadai, Ube City 755, JAPAN

Abstract

This paper describes an application of a new measuring technique; the spatial filtering method(SFM) based on dynamic image processing and sequential image data obtained by a high speed video system for measuring the velocity of dropping particles in the air. For the case of lots of particle numbers and very fast velocity, for example on circulating fluidized bed(CFB), we noted it was very difficult to specify the particle velocity with SFM but confirmed it was very useful successfully. This time we try to apply for more simpler situation as a tentative example. Dropping velocity of single spherical particle in the air is probably well known because it is very easy to obtain such velocity by theoretical calculation or by the experiments with the optical method. Therefore, we tried to obtain it with SFM, then there was a very clear peak of frequency by spectrum analysis than before. As a result, we reconfirmed that SFM was possible and successful method basically for measuring the velocity of moving something like dropping particles in the air.