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:
Apr. 09, 1991
Filed:
Apr. 19, 1989
Applicant:
Inventor:
Katsuhiko Ohmae, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
7386122 ; 7386123 ;
Abstract
A vortex flowmeter comprises a bank of filter sets (12) each for receiving a vortex signal produced according to the flow rate of a fluid to be measured, a waveform shaping circuit (13) for shaping an output of a selected one of the filter sets, a filter set switch decision circuit (14) for switching from one filter set to another by measuring the vortex frequency from an output of the waveform shaping circuit, and a switch circuit (15) responsive to a decision made by the filter set switch decision circuit to switch the filter set to thereby remove noise and beat components contained in the vortex signal.