Measuring and testing – Volume or rate of flow – By measuring transit time of tracer or tag
Patent
1983-04-06
1984-11-06
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
By measuring transit time of tracer or tag
7386127, G01F 166
Patent
active
044804830
ABSTRACT:
A flowmeter wherein measurements relating to fluid flowing in a pipe are obtained by transmitting a laser beam from a high power pulsed laser into the fluid through an optical window in the pipe. The beam in the fluid causes a rapid thermal expansion of the fluid which generates a pressure pulse which travels axially up and down the pipe. Continuously operating low power laser beams are projected into the fluid at points displaced from the source of the acoustic pulse and these beams are modulated when the acoustic pulse passes them. The modulation is detected to obtain first and second transit times, these transit times being utilized to compute the desired fluid flow parameters.
REFERENCES:
patent: 3807228 (1974-04-01), Matzuk
patent: 3918304 (1975-11-01), Abruzzo et al.
patent: 3978713 (1976-09-01), Penney
patent: 4121469 (1978-10-01), Kaule
patent: 4137778 (1979-02-01), Primbsch
patent: 4162397 (1979-07-01), Bucaro et al.
Goldstein Herbert
Schron D.
Westinghouse Electric Corp.
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