H. Morikita et al., SIMULTANEOUS MEASUREMENT OF VELOCITY AND EQUIVALENT DIAMETER OF NONSPHERICAL PARTICLES, Particle & particle systems characterization, 11(3), 1994, pp. 227-234
Citations number
21
Categorie Soggetti
Materials Science, Characterization & Testing","Engineering, Chemical
The performance of a laser-based optical technique to measure simultan
eously the velocity and equivalent diameter of nonspherical particles
was evaluated. The size information was provided by the absolute inten
sity of diffractively scattered light by a particle crossing a single
laser beam, which is concentric with a laser Doppler probe volume. The
response curve (size-intensity relationship) of the technique was est
imated by calculations using the Fraunhofer approximation. Experiments
with spherical glass and polyethylene and non-spherical metal and cer
amic particles ranging from 20 to 200 mum confirmed the operation of t
he technique and in all the measurements the maximum error of the aver
age diameter was 10 mum as compared with size information provided by
a microscope.