Comprehensive electromagnetic flowmeter

Details Comprehensive electromagnetic flowmeter Comprehensive electromagnetic flowmeter

2005-12-13

2005-12-13

Patel, Harshad (Department: 2855)

Measuring and testing

Volume or rate of flow

By measuring electrical or magnetic properties

C073S861120

Reexamination Certificate

active

06973840

ABSTRACT:
An electromagnetic flowmeter works with insulating liquids, and includes circuitry for handle drifting zero-point offset and triboelectric noise occurring in turbulently flowing dielectrics. Two signal processing schemes are presented—using high frequency induction and low frequency induction, but instead of measuring total voltage, the processor senses total voltage differentials, smooths the differentials, then integrates (sums) them such that the three components of total voltage are articulated—and, importantly, the flow voltage component itself is measured.

REFERENCES:
patent: 4290313 (1981-09-01), Appel et al.
patent: 4672331 (1987-06-01), Cushing
patent: 4953409 (1990-09-01), Marchewka et al.
patent: 5866823 (1999-02-01), Scarpa

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