Optodynamic measurement of a non-stationary temperature field in air by multiple laser-beam deflection

被引：4
|
作者：
Bracun, D [1 ]
Diaci, J [1 ]
Mozina, J [1 ]
机构：
[1] Univ Ljubljana, Fac Mech Engn, Ljubljana 1000, Slovenia
来源：
MEASUREMENT SCIENCE AND TECHNOLOGY | 2001年 / 12卷 / 11期
关键词：
gas temperature field; local sound velocity; optodynamic method; multiple laser-beam deflection;
D O I：
10.1088/0957-0233/12/11/334
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new method for non-stationary temperature-field measurement is presented. Optoacoustic generation is used to emit short acoustic transients within the observed field. The transient deflects a probe laser beam, which is folded by two parallel mirrors in such a way that it passes through the observed field several times before it reaches a position-sensitive photo-detector. The timing of the acoustic wavefront transits at several distances from the source is obtained from a single oscilloscope trace of the photo-detector output. By measuring the acoustic wavefront transit times and the distances between the probe-beam segments, the velocity of sound is determined and from this we were able to calculate the local temperature.
引用
收藏
页码：2009 / 2014
页数：6
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