角度加权对动态光散射信号噪声影响的抑制作用

王雅静; 黄钰; 申晋; 徐亚南; 张雯雯; 毛帅

doi:10.3788/OPE.20202804.0808

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角度加权对动态光散射信号噪声影响的抑制作用

现代应用光学 | 更新时间：2020-08-13

- 角度加权对动态光散射信号噪声影响的抑制作用
- Inhibition effect of angle weighting in signal noise in dynamic light scattering
- 光学精密工程 2020年28卷第4期页码：808-816
- 作者机构：
  
  山东理工大学电气与电子工程学院，山东淄博 255000
- 作者简介：
  
  [ "王雅静(1971-)，女，河北承德人，博士，教授，2003年于山东科技大学获得硕士学位，2011年于上海理工大学获得博士学位，主要从事光电精密测试技术方面的研究。E-mail：wangyajing0725@126.com" ]
  申晋(1962-)，男，山西晋城人，博士，教授，1996年于中国农业大学获得硕士学位，2004年于上海理工大学获得博士学位，主要从事光电精密测试技术方面的研究. E-mail:shenjin@sdut.edu.cn SHEN Jin, E-mail:shenjin@sdut.edu.cn
- 基金信息：
  
  山东省自然科学基金资助项目(No.ZR2018MF032);山东省自然科学基金资助项目(No.ZR2018PF014);山东省自然科学基金资助项目(No.ZR2017LF026);山东省自然科学基金资助项目(No.ZR2017MF009);山东省重点研发计划资助项目(No.2019GGX104017)
- DOI：10.3788/OPE.20202804.0808
  中图分类号： O436;O439
- 收稿日期：2019-11-18，
  
  修回日期：2019-12-21，
  
  录用日期：2019-12-21，
  
  纸质出版日期：2020-04-15
- 稿件说明：
移动端阅览
王雅静, 黄钰, 申晋, 等. 角度加权对动态光散射信号噪声影响的抑制作用[J]. 光学精密工程, 2020,28(4):808-816.

Ya-jing WANG, Yu HUANG, Jin SHEN, et al. Inhibition effect of angle weighting in signal noise in dynamic light scattering[J]. Optics and precision engineering, 2020, 28(4): 808-816.
王雅静, 黄钰, 申晋, 等. 角度加权对动态光散射信号噪声影响的抑制作用[J]. 光学精密工程, 2020,28(4):808-816. DOI： 10.3788/OPE.20202804.0808.

Ya-jing WANG, Yu HUANG, Jin SHEN, et al. Inhibition effect of angle weighting in signal noise in dynamic light scattering[J]. Optics and precision engineering, 2020, 28(4): 808-816. DOI： 10.3788/OPE.20202804.0808.

摘要

在动态光散射技术中，光强自相关数据中信号噪声对测量结果的影响，主要取决于颗粒粒度反演算法。在多角度测量时，角度加权则成为左右噪声对测量结果影响的又一重要因素。本文在多角度动态光散射角度加权机理分析的基础上，研究了光强均值和迭代递归角度加权方法对测量信号噪声影响的抑制作用。结果表明，无信号噪声时

对于单峰小粒度分布

迭代递归方法加权对小颗粒粒度分布略有展宽；对于中、大颗粒，光强均值法进行角度加权所得的峰值误差略有增大；随着噪声的增加，迭代递归法加权所得反演结果的性能指标无显著变化，而光强均值法进行角度加权所得结果的峰值误差和分布误差均呈显著增大的趋势。306/974 nm标准双峰颗粒体系光强均值法和迭代递归法的反演峰值误差分别为0.170/0.121，0.092/0.097，迭代递归法峰值位置更准确，能够验证模拟数据的结论。迭代递归法通过各个散射角逐次反演和比较粒度分布重新计算角度权重，这种通过角度权重更新的“修正”作用，在很大程度上抵消了噪声导致的粒度分布误差，从而显现出抵御噪声影响的“去噪”性能。因此，在测量噪声较大的环境下，宜采用迭代递归方法进行多角度加权。

Abstract

In dynamic light scattering technology

the influence of autocorrelation data noise on measurement results primarily depends on the particle-size inversion algorithm. In multiangle measurement

angular weighting becomes another important factor restricting the influence of noise on the measurement results.Based on the analysis of angle weighting mechanism of multiangle dynamic light scattering

the inhibition effect of the angle weighting method of light intensity average and the iterative recursive method on the measurement of noise is studied. The results demonstrate that

in the absence of noise

for the small particles of the unimodal distribution

the PSD is slightly broadened when weighted by the iterative recursive method

and for the medium and large particles

the peak value error increases slightly when the light intensity average method is adopted. With an increase in noise

the performance index of iterative recursive inversion exhibits no obvious change

while the peak value error and PSD error of the results obtained via the light intensity average method are significantly increased. The inversion peak errors of 306/974 nm standard bimodal particle system were observed to be 0.170/0.121 and 0.092/0.097

respectively. The peak positions obtained via the iterative recursive method were more accurate

and the experimental results verified the conclusions from the simulation data. The iterative recursive method recalculates the angle weight via successive inversion and comparison of the PSD of each scattering angle. The "correction" effect of angle weight updation can largely offset the PSD error caused by noise

and thus

the "de-noising" performance of resisting the impact of noise has been depicted. Therefore

in a noisy environment

the iterative recursive method should be used for multiangle weighting.

关键词

Keywords

references

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