Title:
LINE NOISE ANALYSIS AND DETECTION AND MEASUREMENT ERROR REDUCTION
Document Type and Number:
WIPO Patent Application WO/2010/118091
Kind Code:
A3
Abstract:
A method includes sensing a process parameter to generate a sensor signal that includes a process signal and line noise components (102), digitizing the sensor signal at a sample rate (102), detecting line noise zero crossings in the sensor signal (104), determining a line noise frequency as a function of the detected line noise zero crossings (106), and adjusting the sample rate as a function of the line noise frequency to reduce an impact of line noise on the digitized sensor signal (110).
Inventors:
RUD JASON HAROLD (US)
ARNTSON DOUGLAS WAYNE (US)
ARNTSON DOUGLAS WAYNE (US)
Application Number:
PCT/US2010/030179
Publication Date:
January 13, 2011
Filing Date:
April 07, 2010
Export Citation:
Assignee:
ROSEMOUNT INC (US)
RUD JASON HAROLD (US)
ARNTSON DOUGLAS WAYNE (US)
RUD JASON HAROLD (US)
ARNTSON DOUGLAS WAYNE (US)
International Classes:
G01R29/26; G01R13/06
Domestic Patent References:
| WO2008113620A1 | 2008-09-25 |
Foreign References:
| US6140952A | 2000-10-31 | |||
| US6452521B1 | 2002-09-17 | |||
| US6637934B1 | 2003-10-28 |
Other References:
See also references of EP 2417466A4
Attorney, Agent or Firm:
ZUEGE, Austen et al. (P.A.312 South Third Stree, Minneapolis Minnesota, US)
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