Title:
光FMCW後方散乱測定システムの校正
Document Type and Number:
Japanese Patent JP2008512663
Kind Code:
A
Abstract:
The object of the invention is to provide a method of calibrating an optical FMCW backscattering measurement system that improves the precision of the measurement. The problem is solved by a method comprising the steps of A. Converting said received sensor signal to a complex received electrical signal as a function of said modulation frequency fm, said complex received electrical signal being represented by a magnitude part and a phase angle part as a function of said modulation frequency fm; B. Performing a transformation of said received electrical signal to provide a backscattering signal as a function of location between said first and second ends of said sensor and beyond said second end; C. From said backscattering signal as a function of location determining characteristics of a curve representative of said backscattering signal beyond said second end; D. Correcting said magnitude part of said received electrical signal and said phase angle part of said received electrical signal in a predetermined dependence of said curve; and E. Repeating step B) on the basis of the corrected received electrical signal.
Inventors:
Fromm, Martin
Grombizza, Ulrich
Grombizza, Ulrich
Application Number:
JP2007530711A
Publication Date:
April 24, 2008
Filing Date:
September 07, 2005
Export Citation:
Assignee:
LIOS TECHNOLOGY GMBH
International Classes:
G01M11/00; G01K11/12; G01K15/00
Domestic Patent References:
| JPH08338786A | 1996-12-24 | |||
| JP2005147900A | 2005-06-09 | |||
| JPH08338786A | 1996-12-24 | |||
| JP2005147900A | 2005-06-09 |
Attorney, Agent or Firm:
Hironobu Onda
Makoto Onda
Makoto Onda