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. 01, 2003
Filed:
Oct. 24, 2001
Koji Tanimoto, Tokyo, JP;
Shinji Taniguchi, Tokyo, JP;
Tomoya Yamakawa, Tokyo, JP;
Ryuji Toyama, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
The invention provides a flow rate detector capable of precisely detecting a flow rate of an object fluid and effectively reducing a leaning error even when the object fluid is pulsating, thereby improving precision in detection of flow rate. The flow rate detector comprises a flow detector for outputting a flow-detecting signal Sf according to a flow rate of the object fluid utilizing heat transfer phenomenon from an exothermic resistor disposed in a fluid passage to the object fluid, and a gain compensator for compensating an error in a flow-detecting signal Sf by amplifying the flow-detecting signal Sf from the flow detector wherein the gain compensator is arranged to amplify the flow-detecting signal Sf by a substantially constant alternating current gain G larger than a direct current gain G at the time of zero frequency, in a frequency range higher than a frequency f A corresponding to the minimum pulsating frequency of the object fluid.