Photo-Acoustic Flow Meter
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United States of America Patent
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Issued Date -
May 7, 2009
app pub date -
Oct 10, 2008
filing date -
Oct 11, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A photo-acoustic flow meter for use in dialysis is described, that uses an optical beam to generate an acoustic signal in the fluid for which the flow rate is to be measured. The phase angle of the acoustic signal changes when traversing upstream and when traversing downstream. The phase difference between the acoustic signals received upstream and downstream, compared with a reference source signal is measured, and it yields the flow rate of the fluid.
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