Abstract
This paper describes the design and experimental evaluation of aradiometric instrumentation system that has recently been developed for themeasurement of volumetric concentration, velocity and mass flow rate ofpneumatically conveyed solids. The system employs `micro' beam collimation ofgamma radiation to generate multiple, parallel interrogation beams of smallcross-sectional area. This configuration is shown to almost eliminate thegeometrical errors associated with more conventional divergent-beaminterrogation. Experimental results obtained off-line using idealized flowmodels, and also on-line using a pneumatic conveyor, demonstrate theperformance of the system and highlight where further development is needed.
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