Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1994-10-06
1995-06-06
Chilcot, Jr., Richard E.
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
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.
Biegel R.
Chilcot Jr. Richard E.
Marsh - McBirney, Inc.
LandOfFree
Liquid flowmeter including doppler signal processing, and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid flowmeter including doppler signal processing, and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid flowmeter including doppler signal processing, and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-979455