Gas velocity sensor

Details Gas velocity sensor Gas velocity sensor

2011-07-26

2011-07-26

Tarcza, Thomas (Department: 3662)

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

C356S028000

Reexamination Certificate

active

07986398

ABSTRACT:
A method and apparatus for determining gas velocity, which includes generating transmitted radiation having an expected transmission frequency, detecting backscattered radiation, and determining gas velocity in dependence upon any Doppler shift of the frequency of the backscattered radiation, determining a transmission frequency of the transmitted radiation; detecting any difference between the measured transmission frequency and the expected transmission frequency and generating a feedback signal therefrom, and determining gas velocity using said feedback signal.

REFERENCES:
patent: 4195931 (1980-04-01), Hara
patent: 5317376 (1994-05-01), Amzajerdian et al.
patent: 2004/0263826 (2004-12-01), Langdon
patent: WO 2004/077067 (2004-09-01), None
European Patent Office, International Preliminary Report on Patentability and Written Opinion, Mar. 25, 2010, from International Patent Application No. PCT/GB2008/050766, filed on Feb. 9, 2008.
European Patent Office, International Search Report and Written Opinion, Nov. 13, 2008, from International Patent Application No. PCT/GB2008/050766, filed on Feb. 9, 2008.

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