Digital read-out system for external-sensor vortex flowmeter

Details Digital read-out system for external-sensor vortex flowmeter Digital read-out system for external-sensor vortex flowmeter

1976-04-02

1977-04-26

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

System

G01F 132

Patent

active

040193845

ABSTRACT:
A vortex flowmeter for installation in water or other lines to be tested on occasion. The flowmeter includes a flow tube forming a passage for the fluid to be metered and an obstacle assembly mounted therein and capable of generating fluidic oscillations causing a deflectable section of the assembly to vibrate at a corresponding frequency proportional to flow rate. The vibrations of the deflectable section are transmitted to a coupling point outside of the flow tube, whereby the flow rate in any installed flowmeter may be read by an external sensor engaging the coupling point to produce a signal which is fed to a digital indicator, the same system being used to read all of the flowmeters. In order to correct for disparities in the meter factors of the various flowmeters, each meter is provided with an impedance element whose value is determined by the degree of correction required. This element is connected to the indicator system when the coupling point of the flowmeter is engaged by the sensor, the element effecting a change in the time base whereby the resultant digital indication is corrected for the meter factor. Means are also provided to linearize the meter reading.

REFERENCES:
patent: 3116639 (1964-01-01), Bird
patent: 3873814 (1975-03-01), Mirdadion
patent: 3888120 (1975-06-01), Burgess

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