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

页码：2009 / 2014

页数：6

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