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基于投影式背景纹影技术的火焰温度场测量仪设计

Design of Flame Temperature Measurement Instrument Based on Projective Background-Oriented Schlieren Technique

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摘要

基于空气折射率梯度测量的原理,采用投影式背景纹影技术,设计了非接触式火焰温度场测量仪。测量仪以半导体激光器作为光源,采用CCD快速成像,结合粒子图像速度场仪技术,获取了图像上粒子的偏移量以量化偏折角。采用Radon变化求得折射率梯度,利用空气折射率对温度的非线性曲线拟合方程直接得出流场各区域的温度场,采用反投影重建技术对火焰的不均匀温度流场进行了三维重构,实现了火焰温度场的可视化测量。

Abstract

Based on the principle of air refractive gradient measurement, a non-contact flame temperature field measurement instrument is designed using the projective background-oriented schlieren technique. A laser diode is used as the light source. Based on the CCD fast imaging and the particle image velocimetry technique, the offset of particles in the photograph is obtained to quantify the deflection angle. The refractive index gradient is obtained by Radon transform. The temperature field in each region of the flow field is obtained directly using the nonlinear curve fitting equation of air refractive index to temperature. The three-dimensional non-uniform temperature field is reconstructed by the back-projection algorithm. Thus, the visualization of flame temperature measurement is achieved.

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中图分类号:TN29

DOI:10.3788/lop56.052803

所属栏目:遥感与传感器

基金项目:广东省科技计划(2016A040403124)、湛江市科技计划(2017A02024)、岭南师范学院高等教育教学改革项目(LSJG024)

收稿日期:2018-09-30

修改稿日期:2018-11-08

网络出版日期:2018-11-23

作者单位    点击查看

张正贺:岭南师范学院物理科学与技术学院, 广东 湛江 524048
黄贞:岭南师范学院物理科学与技术学院, 广东 湛江 524048
陈汝婷:岭南师范学院物理科学与技术学院, 广东 湛江 524048
薛晓惠:岭南师范学院物理科学与技术学院, 广东 湛江 524048
严春晖:岭南师范学院物理科学与技术学院, 广东 湛江 524048
黄恒烽:岭南师范学院物理科学与技术学院, 广东 湛江 524048
李栋宇:岭南师范学院物理科学与技术学院, 广东 湛江 524048

联系人作者:李栋宇(zzhuangzhen@163.com)

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引用该论文

Zhang Zhenghe,Huang Zhen,Chen Ruting,Xue Xiaohui,Yan Chunhui,Huang Hengfeng,Li Dongyu. Design of Flame Temperature Measurement Instrument Based on Projective Background-Oriented Schlieren Technique[J]. Laser & Optoelectronics Progress, 2019, 56(5): 052803

张正贺,黄贞,陈汝婷,薛晓惠,严春晖,黄恒烽,李栋宇. 基于投影式背景纹影技术的火焰温度场测量仪设计[J]. 激光与光电子学进展, 2019, 56(5): 052803

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