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:
Sep. 01, 2009
Filed:
Feb. 25, 2005
Kazuyuki Yamada, Tokyo, JP;
Yoshinori Ohmuro, Tokyo, JP;
Noritomo Hirayama, Tokyo, JP;
Masami Kishiro, Tokyo, JP;
Kazuyuki Yamada, Tokyo, JP;
Yoshinori Ohmuro, Tokyo, JP;
Noritomo Hirayama, Tokyo, JP;
Masami Kishiro, Tokyo, JP;
Fuji Electric Systems Co., Ltd., Tokyo, JP;
Abstract
In a Doppler ultrasonic flowmeter, to obtain a precise flow rate a flow rate calculation equation that corrects a quantization error occurring to a spatial resolution is used. An ultrasonic transducer transmits/receives ultrasonic pulses, and subject the resulting received signals to A/D conversion after a predetermined process is applied thereto. A computation control section calculates the flow velocity distribution. Then, the flow rate is calculated based on the flow rate calculation equation, which corrects the quantization error occurring to the spatial resolution.