Abstract
In bulk solid handling, measuring the fill volume of vessels with powders is complex due to the uneven material surface. This research presents a method using an array of narrow-beam ultrasonic range finders in a powder discharge vessel. The vessel's cross-sectional area was divided into equal sub-sections, each measured by a range finder. The total fill volume was calculated by summing up the volumes of these sections. This system allows quick volume estimates at around 0.9 Hz under various flow states. In static conditions, tests on flat, concave, and convex powder surfaces showed a volume discrepancy of <5% of vessel capacity. For a vessel discharging polyethylene pellets, the estimated fill volume was under 0.6% uncertainty (confidence interval: 0.95). The findings underscore the utility of ultrasonic range finders for accurate volume determination in powder discharge vessels.
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