Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1992-09-30
1994-12-13
Chilcot, Jr., Richard E.
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
327311, 327552, G01F 132
Patent
active
053720466
ABSTRACT:
A vortex flow transmitter has a filtering circuit receiving a noise contaminated input signal representative of the flow and which has a fundamental frequency varying responsively to flow. The filter filters the input signal using one of a family of HP filter characteristics to produce a filtered signal having a frequency representative of the physical parameter. Each member of the family of HP filters has varying corner frequencies, each filter having a unique switchup and a unique switchdown value assigned to it. Adaptive response element select a current HP filter for use in the filter. Adaptive circuitry uses one selection method when the flow is increasing and another selection method when the flow decreases. Finally, output circuitry converts the signal from the filter into a transmitter output, typically a 4-20 mA current or a frequency output representative of the flow.
REFERENCES:
patent: 3638037 (1972-01-01), McMurkrie
patent: 3709034 (1973-01-01), Herzl
patent: 3864972 (1975-02-01), Burgess et al.
patent: 4270391 (1981-06-01), Herzl
patent: 4545258 (1985-10-01), Coursolle
patent: 4815324 (1989-03-01), Tada et al.
patent: 4866435 (1989-09-01), Frick
patent: 4893035 (1990-01-01), Reynolds et al.
Yehuda Avirav et al., IEEE Transactions on Instrumentation and Measurement, vol. 39 No. 5. Oct. 1990, Implementation of Digital Signal Processing Techniques in the Design of Thermal Pulse Flowmeters.
Frick Roger
Kleven Lowell
Chilcot Jr. Richard E.
Patel Harshad
Rosemount Inc.
LandOfFree
Vortex flowmeter electronics does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vortex flowmeter electronics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vortex flowmeter electronics will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1186661