Title:
METHOD FOR DISPLAYING SURFACE CHARACTERISTIC OF HEAT EXCHANGER PIPE BY RADAR DOPPLER SPECTROSCOPY, AND HEAT EXCHANGER PIPE
Document Type and Number:
Japanese Patent JP2004333125
Kind Code:
A
Abstract:
To provide a method for displaying the characteristics of the structured surface of a heat exchanger pipe rapidly, uniquely with improved reproducibility.
In the method for displaying the structured inner surface and/or outer surface of the heat exchanger pipe welded to a longitudinal seam, each defined sample of a strip of structured material being anticipated for manufacturing the heat exchanger pipe is moved, and is subjected to radar Doppler spectrophotometry by using electromagnetic waves at a frequency range of 1-100 GHz. In this case, area integration A, an average value (m), and amount of dispersion S are obtained from the standardized radar Doppler spectrum with a smoothing pipe as a reference.
Inventors:
MUELLER GERT
RIEDLE JOACHIM
MUELLER WOLFGANG
RIEDLE JOACHIM
MUELLER WOLFGANG
Application Number:
JP2001145931A
Publication Date:
November 25, 2004
Filing Date:
May 16, 2001
Export Citation:
Assignee:
WIELAND WERKE AG
International Classes:
G01N22/00; F28F13/18; G01B15/08; (IPC1-7): G01N22/00
Domestic Patent References:
| JP4003511B | ||||
| JPH07270088A | 1995-10-20 | |||
| JPS60142195A | 1985-07-27 |
Attorney, Agent or Firm:
Akiyoshi Sato