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Abstract: The quality flux of granular solid is one of difficult
parameters in technical press. The traditional methods for measuring the
quality flux of granular solid include with impact quality flowmeter, or
with the combination of volume flowmeter and densimeter, the former is
not fit applying to thin particulate flow and it’s accuracy is not high
for dynamic measurement; the later is rely on the change of temperature
and pressure. According to the extinction methods and Radon Inverse
transform, the quality flux and flow regime are obtained by with optical
scanning and tomographic imaging technique. In the experiment, by
utilizing home-made sensor with 15×5 fan beam stracture, the flux
measurement and dynamic imaging are carried out for arenaceous
quartz(granularity is 0.5~ 1.0 mm) which fall down from a certain
height. The experiment result illuminate that the measurement accuracy
is under 1%, the range of granularity is between 0~3 mm, and the lower
and upper limit for flux are 1.7×10–2 kg/h and 1 350 kg/h. The
experiment result will be a guidance for actual application with this
novel optical measurement.
Key words: Granular solid Quality flowmeter Optical measurement
Computed tomography
CLC No: TH815
国家自然科学基金资助项目(59975019).
Received 20030813, received in revised form 20040118
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