Electromagnetic flowmeter

Details Electromagnetic flowmeter Electromagnetic flowmeter

2005-01-18

2005-01-18

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Mechanical measurement system

C702S045000, C702S050000, C702S100000, C073S861000

Reexamination Certificate

active

06845330

ABSTRACT:
An electromagnetic flowmeter includes a coil, exciting section, noise eliminating section, and arithmetic processing section. The coil applies a magnetic field to a fluid flowing in a pipe line. The exciting section supplies an exciting current to the coil. The noise eliminating section eliminates noise from a measurement signal detected from the fluid under excitation by using a differential frequency component between a commercial power frequency and an exciting frequency. The arithmetic processing section calculates a measurement flow rate on the basis of the measurement signal output from the noise eliminating section.

REFERENCES:
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patent: 4303980 (1981-12-01), Yard
patent: 4644799 (1987-02-01), Tomita
patent: 4658653 (1987-04-01), Tomita
patent: 5388465 (1995-02-01), Okaniwa et al.
patent: 5443552 (1995-08-01), Tomita
patent: 5621177 (1997-04-01), Torimaru
patent: 10-111157 (1998-04-01), None
patent: 2000-258211 (2000-09-01), None

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