Measuring and testing – Volume or rate of flow – By measuring electrical or magnetic properties
Patent
1980-01-31
1981-12-15
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
By measuring electrical or magnetic properties
G01F 156
Patent
active
043053017
ABSTRACT:
Apparatus for measuring the mass flow of a fluid comprises a hollow collector electrode assembly through which the fluid flows. The collector electrode assembly includes a central electrode disposed between and insulated from first and second outer electrodes. An ionizing electrode comprising a length of conductive wire is supported coaxially within the central collector electrode. A voltage source is provided for applying between the ionizing electrode and the collector electrode assembly a potential difference sufficient to ionize the fluid. The ions thereby produced at the ionizing electrode migrate towards the central collector electrode but are displaced in the direction of fluid flow by an amount dependent upon the mass flow of the fluid. A differential amplifier is responsive to the number of ions migrating to the outer collector electrodes to provide a measure of the displacement of the ions by the fluid flowing through the collector electrode assembly.
REFERENCES:
patent: 3835705 (1974-09-01), Hadjidjanian
patent: 4144750 (1979-03-01), Read
patent: 4193296 (1980-03-01), Janka
Cockshott Charles P.
Evans Kenneth S.
Pacaud Christopher M. R.
Goldstein Herbert
Lucas Industries Limited
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