Title:
電磁流量計におけるスペクトル診断法
Document Type and Number:
Japanese Patent JP4824249
Kind Code:
B2
Abstract:
A magnetic flow transmitter provides a coil driver output at a selected fundamental to a coil on a flow tube carrying a flow of a liquid. An amplifier amplifies an electrode signal from the flow tube and an A/D converter converts the amplified electrode signal. A digital signal processor (DSP) uses a spectral transform such as a Fourier type transform to generate a flow output based on spectral components at or near the fundamental and a noise diagnosing output based on components at or near a noise frequency.
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Inventors:
Wales, David, Elle.
Application Number:
JP2001586422A
Publication Date:
November 30, 2011
Filing Date:
May 22, 2001
Export Citation:
Assignee:
Rosemount Incorporated
International Classes:
G01D3/028; G01F1/60; G01D3/032; G01F23/18; G01D3/036; G01F1/58; G01F25/00; G01L9/00; G01L13/06; G08C19/02; G08C25/00; H04B15/00
Domestic Patent References:
JP4104013A | ||||
JP7005006A | ||||
JP2057918A | ||||
JP61066123A |
Attorney, Agent or Firm:
Kaori Tanaka
Michito Hiraki
Sanji Tanabe
Michito Hiraki
Sanji Tanabe