Novel Method for Processing Mass Diffusion Holographic Interference Image via Discrete Fourier Transform Based Phase Measurement

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Novel Method for Processing Mass Diffusion Holographic Interference Image via Discrete Fourier Transform Based Phase Measurement

更新时间：2025-07-09

- Novel Method for Processing Mass Diffusion Holographic Interference Image via Discrete Fourier Transform Based Phase Measurement
- Vol. 42, Issue 11, Pages: 1350-1355(2008)
- 作者机构：
  
  西安交通大学动力工程多相流国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： O438.1;TK121
- Online First：10 November 2008，
  
  Published：2008
- 稿件说明：
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Novel Method for Processing Mass Diffusion Holographic Interference Image via Discrete Fourier Transform Based Phase Measurement[J]. 2008, 42(11): 1350-1355.
DOI：

Novel Method for Processing Mass Diffusion Holographic Interference Image via Discrete Fourier Transform Based Phase Measurement[J]. 2008, 42(11): 1350-1355. DOI：

摘要

将基于傅里叶变换的相位检测原理应用于流体质扩散系数测量中的图像数据处理

提出了一种新的流体质扩散激光全息干涉条纹图像的处理方法.该方法由小波变换去噪、频域窗口滤波、全息图物像再现及最小二乘法相位展开等步骤组成.采用该方法对实验中采集的标准体系0.33 mol/L KCl溶液在298.15 K下与水的质扩散干涉条纹图像以及在不同温度下0.1 mol/L蔗糖水溶液-水扩散系的扩散干涉条纹图像进行了处理

并通过与文献值的比较验证了该方法的准确性.该方法充分利用了全息图的相位信息

进一步提高了处理实验数据的精度

通过误差分析可知其理论精度可以达到0.1%

从而可为激光全息干涉法测量流体质扩散系数实验提供新的手段.

Abstract

A new processing method of holographic interference image for measuring mass diffusion coefficient was proposed by adopting the theory of discrete Fourier transform(DFT)in phase detection of the mass diffusion interference image. The method consists of four steps

i.e.

wavelet denoise

wave filtering in frequency domain

reconstruction of object wave

and least squares phase unwrapping. The holographic interference image of 0.33 mol/L KCl solution with water at the temperature of 298.15 K and the holographic interference image of 0.1 mol/L sucrose solution with water at five different temperatures were processed using the present method. Literature data and the processing results were compared and the accuracy of this method was verified. It is possible that adopting the present method can extract the phase information of the interference image completely and then improve the processing precision greatly.

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references

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