Arrangements by apparatuses for measuring mass flow
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United States of America Patent
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Issued Date -
May 16, 2002
app pub date -
Oct 31, 2001
filing date -
Oct 31, 2000
priority date (Note) -
Abandoned
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Abstract
The invention relates to arrangements at apparatus for weighing the mass flow of fluent material, especially of particulate type, by determining forces exerted from the material per unit length in the direction of its movement and its velocity or travel, wherein the measured force (G) corresponds to the weight of the material per unit length; the velocity of the material is measured in a position which corresponds to the mean velocity over the unit length; the velocity sensor (9) is an optical measuring means comprising a light source reflected against an array of photo detecting cells producing a signal representing a speckle pattern of the particulate material; said signal is processed in a calculating means (12) giving an output signal representing the velocity or travel of the material; and the material flow is determined by the calculating means (12) from the output signals from the weight measuring means and the velocity measuring means.
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