Electromagnetic flowmeter

Measuring and testing – Volume or rate of flow – By measuring electrical or magnetic properties

Reexamination Certificate

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Reexamination Certificate

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06865956

ABSTRACT:
When a plane (PLN) which includes electrodes (2a, 2b) and is perpendicular to the direction of an axis (PAX) of a measuring pipe (1) is defined as a boundary in the measuring pipe (1), an exciting coil (3) applies asymmetrical magnetic fields to a fluid to be measured, which flows through the measuring pipe (1), on both sides of the plane (PLN) serving as the boundary in the measuring pipe (1). A signal conversion unit (5) obtains the phase difference between an exciting current supplied to the exciting coil (3) and an interelectrode electromotive force detected by the electrodes (2a, 2b). A flow rate output unit (6) calculates the flow rate of the fluid on the basis of the phase difference obtained by the signal conversion unit (5).

REFERENCES:
patent: 6634238 (2003-10-01), Budmiger
patent: 53-017762 (1978-02-01), None
patent: 55-149012 (1980-11-01), None

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