摘要
提出基于条纹傅里叶变换的激光干涉温度测量方法,并采用Mach-Zehnder干涉仪,以蜡烛轴对称火焰温度场为对象进行验证.在恢复相位的过程中,结合未受温度场扰动的干涉图像,修正了相位中因图像数字化离散的线性偏差.对比几种滤波器的计算结果,表明滤波器的特征对结果有明显影响,采用适当参数的余弦形边界滤波器可有效提取频谱信息.蜡烛火焰及其外围温度分布的测试结果表明,干涉条纹傅里叶分析法可方便快捷地用于测量二维轴对称温度场分布.
A temperature measurement method using laser interference fringe Fourier transformation was presented.Based on the Mach-Zehnder interferometer,the candle axisymmetric flame temperature field was used to verify the presented method.Using interferogram undisturbed by temperature field in the process of recovering phase shift,the linear deviation caused by image digitization in the phase was corrected.By comparing the results of various filters,it is shown that features of the filter have a significant impact on the result,and the cosine-shaped edge filter with appropriate parameters can effectively extract the spectrum information.Experimental results of candle flame indicate that the presented method can be used to measure two-dimensional temperature distributions quickly and conveniently.
作者
陈宇
张海峰
卢荣德
陈越
何立群
CHEN Yu;ZHANG Haifeng;LU Rongde;CHEN Yue;HE Liqun(Department of Thermal Science and Energy Engineering , University of Science and Technology of China , Hefei 230027, China)
基金
国家自然科学基金(31670866,31970754)资助.
