Method and ultrasonic meter system for determining pipe...

Measuring and testing – Surface and cutting edge testing – Roughness

Reexamination Certificate

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C073S597000

Reexamination Certificate

active

07373808

ABSTRACT:
A method and ultrasonic meter system for determining pipe roughness. At least some of the illustrative embodiments are ultrasonic meters comprising a spool piece that couples within a flow of fluids, and a first transducer pair mechanically mounted to the spool piece and acoustically coupled to the flow of fluids (wherein the first transducer pair comprises an upstream transducer and a downstream transducer in operational relationship to the upstream transducer and defines a first chord there between). The ultrasonic meter is configured to determine diagnostic data based on acoustic signals transmitted between the first transducer pair (wherein the diagnostic data comprises an asymmetry of the flow of fluids in the spool piece, a cross flow of the flow of fluids in the spool piece, and a profile factor of the flow of fluids in the spool piece). The ultrasonic meter is configured to determine changes in the roughness of a pipe mechanically coupled to the ultrasonic meter based on a trend of the diagnostic data (wherein the trend comprises a substantially constant value of about unity for both the asymmetry and the cross flow and a substantially changing value for the profile factor).

REFERENCES:
patent: 4300401 (1981-11-01), Pedersen
patent: 6047602 (2000-04-01), Lynnworth
patent: 6067861 (2000-05-01), Shekarriz et al.
patent: 2003/0101804 (2003-06-01), Zanker
patent: 2005/0055171 (2005-03-01), Freund et al.
Klaus J. Zanker, “Diagnostic Ability of the Daniel Four-Path Ultransonic Flow Meter,” Article Published at WWW.EMERSONPROCESS.COM Website at Least as Early as the Filing Date of U.S. Appl. No. 11/382,160.

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