The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 1997
Filed:
Oct. 07, 1996
Tutomu Mochizuki, Okazaki, JP;
Aichi Tokei Denki Co., Ltd., Nagoya, JP;
Abstract
An electromagnetic flow meter which calculates the electric conductivity of a fluid based on the ratio of an output signal generated when electrodes are grounded through short-circuit resistors Rs.sub.1, Rs.sub.2 to an output signal generated when the electrodes are not grounded, and more accurately corrects a flow measurement using the electric conductivity, characterized in that, for reducing measurement errors due to fluctuation in DC offset voltage accompanied by an on/off operation of the short-circuit switch S1, outputs are measured when the short-circuit switch S1 is on and off in a magnetization state, the output are next measured when the short-circuit switch S1 is on and off in a non-magnetization stage, and the outputs in the non-magnetization state are subtracted from the outputs in the magnetization state, thereby removing the influence of 'DC offset voltage fluctuation' occurring accompanied by the on/off operation of the short-circuit switch S1.