Method for processing signals in vortex flowmeters

Details Method for processing signals in vortex flowmeters Method for processing signals in vortex flowmeters

1992-03-09

1994-05-10

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

328167, G01F 132

Patent

active

053097718

ABSTRACT:
An electrical signal generated by a transducer included in a vortex sensor and conditioned by a preamplifier is supplied to a pair of parallel electronic filters respectively inhibiting transmission of the electrical signals with frequencies in a low and high ranges devided by a reference frequency, wherein a frequency detector detects the dominant frequency of the electrical signal and puts out control inputs depending on the dominant frequency of the electrical signal to two switches respectively controlling transmission of the electrical signal through the pair of parallel electronic filters; wherein the control input closes only one of the two switches depending on values of the dominant frequency of the electrical signal relative to the reference frequency in such a way that the electrical signal with frequencies in the low range is transmitted without the transmission of the high frequency noise and the electrical signal with frequencies in the high range is transmitted without the transmission of the low frequency noise.

REFERENCES:
patent: 3522449 (1970-08-01), McMurtrie
patent: 3747025 (1973-07-01), Iten et al.
patent: 4270391 (1981-06-01), Herzl
patent: 4319207 (1982-03-01), Gignoux
patent: 4545258 (1985-10-01), Coursolle
patent: 4966040 (1990-10-01), Ohmae

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