Measuring and testing – Volume or rate of flow – System
Patent
1996-04-29
1998-04-14
Dougherty, Elizabeth L.
Measuring and testing
Volume or rate of flow
System
7386164, G01F 174
Patent
active
057394296
ABSTRACT:
A system for monitoring the flow rate of particulate material entrained within an air stream includes a feed hopper providng a source of the particulate material, and a hose for conveying the particulate material within the air stream. A pump draws the particulate material from the feed hopper and transports the particulate material with the air stream through the hose. A flow meter is associated with the hose and measures the mass flow rate of the particulate material through the hose to provide a first flow indication. A device is associated with the feed hopper and measures the change in weight of the feed hopper over a predetermined interval to provide a second flow indication. A controller corrects the first flow indication from the flow meter according to the second flow indication from the gravimetric device. The flow measurement system provides an accurate and fast responding flow meter by combining the advantages of a fast responding in-line flow meter with the accuracy of a weight measurement system.
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Energy International, Inc., "Development of an Extended Length Venturi Meter for Gas/Solid Flows," Report No. 938R325, Mar. 1992.
Askew John R.
Price Richard P.
Schmitkons James W.
Shanaberger Jan L.
Dougherty Elizabeth L.
Noori Max H.
Nordson Corporation
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