Apparatus and method for determining a flow count

Details Apparatus and method for determining a flow count Apparatus and method for determining a flow count

1996-10-04

1998-01-20

Dougherty, Elizabeth L.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

7386131, 7386127, G01F 166

Patent

active

057103798

ABSTRACT:
An apparatus for determining a flow count in an ultrasonic flow meter has an upstream oscillator (22) with an upstream signal (24) having a period proportional to an upstream transit time and a downstream oscillator (26) with a downstream signal (28) having a period proportional to a downstream transit time. The upstream signal (24) is coupled to a positive increment input (30) of a counter (32) and the downstream signal (28) is coupled to a negative increment input (36) the counter (32).

REFERENCES:
patent: 3780577 (1973-12-01), Brown
patent: 4300400 (1981-11-01), Bistrian, Jr. et al.
patent: 4509373 (1985-04-01), Brown
patent: 5005425 (1991-04-01), Ohmae
patent: 5052230 (1991-10-01), Lang et al.
patent: 5117698 (1992-06-01), Baumoel
patent: 5163331 (1992-11-01), Gill
patent: 5553505 (1996-09-01), Bignell et al.

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