基于图像灰度的羽流模型建立及羽流对电波传播特性的影响

发布时间：2018-04-13 09:07

本文选题：羽流建模 + 图形图像　；参考：《电波科学学报》2017年03期

【摘要】：结合计算机图形学原理和非均匀介质中的电波传播理论,提出一种高效的基于图像的电磁建模方法,并将其用于等离子体羽流的电波传播特性研究.该方法以光学照片为基础,进行基于像素点的采样,得到照片的光学强度分布.利用光学强度分布与对应物理量的关系,以数字图像处理技术还原照片中的数据.在此基础上,根据物理模型的旋转对称性这一特点,以升维度方式还原图像所描述的物理模型,从而实现三维计算模型的创建.这种建模方法可更加真实地反映物理模型的空间分布性态,因而能够为实际问题的分析提供有效、可靠的仿真模型.然后,利用本方法建立羽流三维模型,采用移位算子法分析电波在其中的传播特性,发现了一些特殊的传播现象.由于所建模型来源于实验场景照片,因而所得的传播现象能够更加真实地反映电波在羽流中的传播特性,为工程应用提供有价值的参考.
[Abstract]:Based on the principle of computer graphics and the theory of radio wave propagation in non-uniform medium, an efficient image-based electromagnetic modeling method is proposed and applied to the study of radio wave propagation characteristics of plasma plume.Based on the optical photographs, the method is based on pixel sampling to obtain the optical intensity distribution of the photographs.Using the relation between the optical intensity distribution and the corresponding physical quantity, the digital image processing technique is used to restore the data in the photo.On this basis, according to the characteristics of rotational symmetry of the physical model, the physical model described in the image is restored in the ascending dimension, thus the 3D computing model is created.This modeling method can more truly reflect the spatial distribution of the physical model, so it can provide an effective and reliable simulation model for the analysis of practical problems.Then, the plume three-dimensional model is established by using this method, and some special propagation phenomena are found by using the shift operator method to analyze the propagation characteristics of the radio waves in the plume.Because the model is derived from the photographs of the experimental scene, the propagation phenomena obtained can reflect the propagation characteristics of the radio waves in the plume more realistically, and provide valuable reference for the engineering application.
【作者单位】：西安电子科技大学物理与光电工程学院电波研究所;西安电子科技大学信息感知技术协同创新中心;
【基金】：国家自然科学基金(No.61231003;61571348;61401344)
【分类号】：TN011

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