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:
Mar. 18, 2014
Filed:
Dec. 14, 2010
Hirokazu Gotou, Nara, JP;
Aoi Watanabe, Nara, JP;
Yuji Fujii, Nara, JP;
Kouichi Takemura, Nara, JP;
Yuji Nakabayashi, Nara, JP;
Hirokazu Gotou, Nara, JP;
Aoi Watanabe, Nara, JP;
Yuji Fujii, Nara, JP;
Kouichi Takemura, Nara, JP;
Yuji Nakabayashi, Nara, JP;
Panasonic Corporation, Osaka, JP;
Abstract
When a flow rate is equal to or more than a reference flow rate, a reference voltage is changed to a level capable of measuring stably to thereby realize the improvement of measurement accuracy at the time of a large amount of flow rate. A flow rate determination means compares a flow rate calculated by a flow rate calculation means with the reference flow rate. When the calculated flow rate is larger than the reference flow rate, the reference voltage set by a reference voltage setting means is changed, whereby the zero cross point can be detected stably at the portion where the degree of the influence of the change in the amplitude of the received signal is small. Thus, it is possible to provide a flow rate measuring device capable of measuring a flow rate stably with high accuracy even when a fluid flow is disturbed due to a large amount of flow rate.