Measuring and testing – Volume or rate of flow – By measuring transit time of tracer or tag
Patent
1987-04-14
1988-08-02
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
By measuring transit time of tracer or tag
73170A, G01F 170, G01P 518
Patent
active
047607432
ABSTRACT:
A system and method are disclosed for acoustic scintillation liquid flow measurement. Measurement is carried out by acoustic beams transmitted perpendicular to the direction the component of liquid flow to be measured, with both phase and amplitude measurements being made to enable generation of accurate speed of flow indications which are indicative of liquid flow through a broad area being monitored as opposed to a single point therein. In one realization of this invention, a pair of projectors are mounted on one side of the flow area, such as a channel to be monitored, and a pair of receivers are mounted on the other side of the flow area with pulsed acoustic signals from each of the projectors being transmitted in separate parallel paths through the liquid, such as water, to the receivers. At the receivers, electrical signals indicative of received acoustic signals in each path are complex demodulated after which the demodulated outputs are shaped, converted and then coupled to a microcomputer for evaluation and, responsive thereto, providing the indication of liquid flow speed.
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"Spectral Analysis and Its Applications", Gwilym M. Jenkins and Donald G. tts, pp. 146, 154 and 173.
Flemons, "A New Non-Intrusive Flowmeter" in N.B.S. Special Publication 484, 10/77, pp. 319-333.
Clifford Steven F.
Farmer David M.
Englert Alvin
Goldstein Herbert
Harris Robert E.
The United States of America as represented by the Secretary of
Zack Thomas
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