Measuring and testing – Volume or rate of flow – By measuring transit time of tracer or tag
Patent
1995-11-09
1998-04-21
Biegel, Ronald L.
Measuring and testing
Volume or rate of flow
By measuring transit time of tracer or tag
324639, G01F 1708
Patent
active
057419795
ABSTRACT:
Method and apparatus are provided for determining the velocity of individual food particles within a liquid/solid food mixture that is cooked by an aseptic cooking method whereby the food mixture is heated as it flows through a flowline. At least one upstream and at least one downstream microwave transducer are provided to determine the minimum possible travel time of the fastest food particle through the flowline. In one embodiment, the upstream detector is not required. In another embodiment, a plurality of small dipole antenna markers are secured to a plurality of food particles to provide a plurality of signals as the markers pass the upstream and downstream transducers. The dipole antenna markers may also include a non-linear element to reradiate a harmonic frequency of a transmitter frequency. Upstream and downstream transducers include dipole antennas that are matched to the impedance of the food slurry and a signal transmission cable by various impedance matching means including unbalanced feed to the antennas.
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Article titled "Electro-magnetic Probe Techniques For Fluid Flow Measurements" by G.D. Arndt and J.R. Carl.
Arndt G. Dickey
Carl James R.
Barr Hardie R.
Biegel Ronald L.
The United States of America as represented by the Administrator
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