Title:
ELECTROMAGNETIC FLOWMETER FOR WATER CONVEYANCE IN SEMIFULL STATE
Document Type and Number:
WIPO Patent Application WO/1993/005368
Kind Code:
A1
Abstract:
An electromagnetic flowmeter for water conveyance in a semifull state, whose measurement error caused by the inclination of a pipeline can be reduced. In the flowmeter, excitation coils U and L provided on the upper and lower sides of a pipeline 1 are excited alternately and the flow rate Q0 of the pipeline is given by the equation Q0 = epsilonU0/k0 where epsilonU0 is determined by the ratio of the output voltages of the coils U, L when the coils are excited P0 = epsilonL0/epsilonU0 and k0 is the sensitivity at that time. The flowmeter is characterized in that the data of the relation of the flow rate Q with the output ratio epsilonL/epsilonU and the data of the relation of the flow rate Q with the sensitivity k are measured beforehand using various inclinations alpha, beta, gamma, delta,... of the pipeline as parameters, and from these data, the flow rate Q0 is calculated and corrected by using the curve representing data on an inclination approximate to an unknown inclination rho of the pipeline.
Inventors:
Yoshida, Yutaka
Application Number:
PCT/JP1992/001124
Publication Date:
March 18, 1993
Filing Date:
September 03, 1992
Export Citation:
Assignee:
Aichi
Tokei
Denki
CO., LTD.
Yoshida, Yutaka
Tokei
Denki
CO., LTD.
Yoshida, Yutaka
International Classes:
G01F1/00; G01F1/58; G01F1/60; G01F25/00; (IPC1-7): G01F1/60
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