Invention Grant
US08676517B2 Signal processing method, signal processing apparatus, and coriolis flowmeter
有权
信号处理方法，信号处理装置和科里奥利流量计
- Patent Title: Signal processing method, signal processing apparatus, and coriolis flowmeter
- Patent Title (中): 信号处理方法，信号处理装置和科里奥利流量计
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Application No.: US12921456Application Date: 2009-06-10
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Publication No.: US08676517B2Publication Date: 2014-03-18
- Inventor: Hirokazu Kitami , Hideki Shimada
- Applicant: Hirokazu Kitami , Hideki Shimada
- Applicant Address: JP Tokyo
- Assignee: Oval Corporation
- Current Assignee: Oval Corporation
- Current Assignee Address: JP Tokyo
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2009-025715 20090206
- International Application: PCT/JP2009/060970 WO 20090610
- International Announcement: WO2010/089906 WO 20100812
- Main IPC: G01F1/00
- IPC: G01F1/00 ; G01F1/80
Abstract:
A signal processing method for a Coriolis flowmeter including: performing frequency conversion of a first digital signal, the frequency conversion performed on the first digital signal modulating the frequency of the first digital signal so that the frequency of the first digital signal after the frequency conversion is 1/Nth of the frequency of the first digital signal before the frequency conversion, where N is an integer; performing frequency conversion of a second digital signal, the frequency conversion performed on the second digital signal modulating the frequency of the second digital signal so that the frequency of the second digital signal after the frequency conversion is 1/Nth of the frequency of the second digital signal before the frequency conversion; and measuring a phase difference between (i) the frequency converted first digital signal and (ii) the frequency converted second digital signal.
Public/Granted literature
- US20110016989A1 SIGNAL PROCESSING METHOD, SIGNAL PROCESSING APPARATUS, AND CORIOLIS FLOWMETER Public/Granted day:2011-01-27
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