Electronic filter for flowmeters with compound controls

Details Electronic filter for flowmeters with compound controls Electronic filter for flowmeters with compound controls

1994-07-05

1995-07-25

Chilcot, Jr., Richard E.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

G01F 132

Patent

active

054351880

ABSTRACT:
An electronic filter for conditioning a primary flow signal including alternating electrical signals generated in a flowmeter comprises a parallel bank of low frequency bandpass filters and high frequency bandpass filters, wherein the switching on or off of the individual low frequency bandpass filters is controlled by a command signal generated from an auxiliary flow signal provided by an accessory flowmeter supplying a crude but stable signal representing the level of fluid flow, and the switching on and off of the individual high frequency bandpass filters is controlled by a command signal generated from the frequency of the primary flow signal providing a highly accurate and extremely sensitive signal that represents the time rate of fluid flow.

REFERENCES:
patent: 3522449 (1970-08-01), McMurtrie
patent: 3747025 (1973-07-01), Iten et al.
patent: 4270391 (1981-06-01), Herzl
patent: 4545258 (1985-10-01), Coursoue
patent: 4934194 (1990-06-01), Itoh et al.
patent: 4966040 (1990-10-01), Ohmae

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