Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1983-08-29
1985-11-05
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
7386139, G01F 120, G01F 166
Patent
active
045506159
ABSTRACT:
A flowmeter which is connectable in series with a fluid supply line and which functions to meter the rate of fluid flow through the supply line. The flowmeter incorporates a chamber into and through which fluid is passed, and an acousto-electrical transducer is located within the chamber for exposure to acoustical energy which is emitted by fluid passing through the chamber. The transducer is connected in circuit with a detector which is arranged to provide an output which follows the peak voltage of an amplified output signal generated by the transducer as a consequence of the transducer being exposed to acoustical energy of the fluid. A display device is incorporated in the flowmeter for providing a measure of the detector output, and hence of the amplitude of the transducer output, in terms of fluid flow rate.
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"Calibrated Electronic Listener Hears Flow and Measures It" in Product Eng. 9/22/69.
Davis et al., "A New Method for Monitoring Blood Flow in External Shunts" in Proc. on Eng. in Medicine & Biology 11/16/70 p. 279.
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