Ultrasonic fluid vibrating flowmeter

Details Ultrasonic fluid vibrating flowmeter Ultrasonic fluid vibrating flowmeter

1994-04-25

1996-04-02

Chilcot, Jr., Richard E.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

7386119, G01F 100

Patent

active

055030351

ABSTRACT:
An ultrasonic fluid vibrating type flowmeter comprising a set of ultrasonic transmitter and ultrasonic receiver mounted on a pipe carrying the fluid whose flow rate is to be measured; driving device for intermittently driving the transmitter using burst waves containing an oscillation frequency to cause the transmitter to apply ultrasonic signals to the fluid and cause its vibration; standard timing device for generating a standard signal to control the timing of the burst waves whereby the receiver receives an amplitude modulated signal whose amplitude is modulated by the frequency modulation caused by vibration of the fluid; and sampling device for sampling an envelope of the amplitude modulated signal in synchronism with the standard signal and at times governed by a predetermined function, whereby the vibration frequency of the fluid is detected from the sampled amplitude modulated envelope while concurrently removing noise influences.

REFERENCES:
patent: 4333353 (1982-06-01), Baumoel
patent: 4391149 (1983-07-01), Herzel
patent: 4751847 (1988-06-01), Katakura
patent: 4825422 (1989-04-01), Takeda
patent: 4934194 (1990-06-01), Itoh et al.
patent: 4947683 (1990-08-01), Minear et al.
patent: 5271404 (1993-12-01), Corl et al.

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