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. 21, 2008
Filed:
Feb. 24, 2005
Masami Kishiro, Tokyo, JP;
Kouji Hagiwara, Tokyo, JP;
Toshihiro Yamamoto, Tokyo, JP;
Hironobu Yao, Tokyo, JP;
Yoshinori Ohmuro, Tokyo, JP;
Noritomo Hirayama, Tokyo, JP;
Masami Kishiro, Tokyo, JP;
Kouji Hagiwara, Tokyo, JP;
Toshihiro Yamamoto, Tokyo, JP;
Hironobu Yao, Tokyo, JP;
Yoshinori Ohmuro, Tokyo, JP;
Noritomo Hirayama, Tokyo, JP;
Fuji Electric Systems Co., Ltd., Tokyo, JP;
Abstract
A flowmeter includes: a transit time method unit having a sensor and a reception signal amplification control unit and a flow rate calculation unit which are connected to the sensor via a sensor selector switch; a pulse Doppler method having a reception signal amplification control unit and an integration calculation unit which are connected to the sensor; a transmission/reception timing control unit common to them; a measurement method selection control unit for controlling switching between the transit time method unit and the pulse Doppler method unit, and parallel operation; and a measurement value output selector switch for selecting the output of the transit time method unit and the pulse Doppler method unit. That is, the single flowmeter can perform flow rate measurement by the transit time method having no restriction on the measurement range as well as by the pulse Doppler method having an upper limit of the measurement range but enabling a highly accurate measurement.