Liquid flowmeter including doppler signal processing, and method

Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy

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7386123, G01F 100

Patent

active

054212111

ABSTRACT:
A liquid flowmeter and method for determining the velocity of flow of fluid in a conduit, including a sensor adapted for mounting in the bottom of the conduit, and including acoustic energy transmitting and receiving devices, an in-phase reflected Doppler energy signal detector connected with the receiving device, an anti-alias low pass filter for producing from the in-phase reflected energy a filtered signal, a digital-to-analog converter for digitalizing the in-phase signal to produce a sampled array, an accumulator for storing a first number (M) of mean zeroed power spectra from the sampled array, a zeroing device for zeroing a second number (K) of the initial samples of the power spectra, thereby to produce a first modified spectra, a median filter of rank R for filtering the first modified spectra to produce a second modified spectra, a limiting device for limiting the second modified spectra to produce samples limited to the upper portion of a range of amplitudes, thereby to produce a third modified spectra, a device for determining the high-frequency edge of the third modified spectra, a first converting device operable when the third modified spectra have a wide band width for producing as a multiple of the high-frequency edge an estimate of mean fluid velocity, and a second converting device operable when the third modified spectra have a narrow band width for producing as a function of the spectral peak an estimate of mean fluid velocity.

REFERENCES:
patent: 2972068 (1961-02-01), Howry et al.
patent: 3403271 (1968-09-01), Lobdell et al.
patent: 3675192 (1972-07-01), Fahrbach
patent: 4048853 (1977-09-01), Smith et al.
patent: 4067236 (1978-01-01), Hottinger
patent: 4540946 (1985-09-01), Sainz et al.
patent: 4579005 (1986-04-01), Brown
patent: 4790323 (1988-12-01), Leavitt et al.
patent: 4866613 (1989-09-01), Amemiya et al.
patent: 4989609 (1991-02-01), Smith et al.
patent: 5020374 (1991-06-01), Petroff et al.
patent: 5046500 (1991-09-01), Fehr
patent: 5198989 (1993-03-01), Petroff
patent: 5228009 (1993-07-01), Forestieri et al.
patent: 5299174 (1994-03-01), Forestieri et al.
Peter Atkinson and John P. Woodcock, Doppler Ultrasound and its Use in Clinical Measurement, 1982, pp. 116-125.

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