Tunable diode laser time-of-flight anemometer: theory and structure

Gary E. Kidd

doi:10.1117/12.452072

23 September 2002 Tunable diode laser time-of-flight anemometer: theory and structure

Gary E. Kidd

Proceedings Volume 4817, Diode Lasers and Applications in Atmospheric Sensing; (2002) https://doi.org/10.1117/12.452072
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

A time-of-flight anemometer is decribed which is composed of multiple IR absorption paths between fiber connected lenses arranged in symmetric configurations which provide spatial and temporal separation of the object gas, H₂O, processes intersecting the tunable diode laser beams. The time series H₂O concentration data from two gas analyzer paths are continuously correlated in real time to provide estimates of time shift between the processes. From beam geometry and time shifts, wind velocity vectors are calculated for a two-dimensional equilateral triangle prism structure and a three-dimensional co-axial structure. The real time convolution process is described and expected resolution and accuracy in the near surface layer are included. The resolution of the wind vectors and scalar variables makes this gas analyzer-anemometer suitable for eddy correlation flux measurements.

Citation Download Citation

Gary E. Kidd "Tunable diode laser time-of-flight anemometer: theory and structure", Proc. SPIE 4817, Diode Lasers and Applications in Atmospheric Sensing, (23 September 2002); https://doi.org/10.1117/12.452072

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available