Electromagnetic Scattering of Blast Furnace Burden Surface With Stochastic Properties

IF 4.8 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Antennas and Wireless Propagation Letters Pub Date : 2024-11-13 DOI:10.1109/LAWP.2024.3496903

Qing Yu;Xianzhong Chen;Qingwen Hou;Jie Zhang

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Abstract

Microwave radars have been utilized as detectors within blast furnaces to accomplish the measurement of the surface shape of the furnace burden. However, the additional physical information contained in the radar echoes has not yet been fully explored. The electromagnetic scattering model of the burden surface can serve as the theoretical foundation for the inversion of radar data. In this letter, first, the statistical values of the roughness parameters of the burden surface are obtained by measuring typical samples. Second, an equivalent dielectric constant model is proposed for the coexistence of coke, ore, water, and gas on the burden surface. Finally, the back-scattering coefficient of the burden surface was calculated by the integral equation method (IEM) based on the roughness parameters and geometric characteristics of the burden surface. The effects of charge size and volume fractions of ore, coke, and water on the electromagnetic scattering characteristics were analyzed. The experimental results indicate that for the blast furnace burden surface where coke, ore, and gas coexist, when the angle of incidence is 30° and the root mean square height is less than 0.03 m, the back-scattering is enhanced as the roughness of the burden surface increases. In comparison, for the surface of coke material, the moisture content has a greater impact on electromagnetic scattering than the incorporation of ore with the same volume fraction.

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具有随机特性的高炉炉料表面电磁散射

利用微波雷达作为探测器在高炉内完成炉料表面形状的测量。然而，雷达回波中包含的额外物理信息尚未得到充分探索。载荷面电磁散射模型可作为雷达数据反演的理论基础。本文首先通过对典型试样的测量，得到了料面粗糙度参数的统计值。其次，提出了焦炭、矿石、水和气体在炉料表面共存的等效介电常数模型。最后，根据料面粗糙度参数和料面几何特性，采用积分方程法计算料面后向散射系数。分析了矿石、焦炭和水的电荷大小和体积分数对电磁散射特性的影响。实验结果表明，对于焦炭、矿石和气体共存的高炉炉料面，当入射角为30°，均方根高度小于0.03 m时，随着炉料面粗糙度的增加，后向散射增强；相比之下，对于焦炭材料表面，水分含量对电磁散射的影响大于相同体积分数下矿石掺入对电磁散射的影响。

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来源期刊

IEEE Antennas and Wireless Propagation Letters 工程技术-电信学

CiteScore

8.00

自引率

9.50%

发文量

529

审稿时长

1.0 months

期刊介绍： IEEE Antennas and Wireless Propagation Letters (AWP Letters) is devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation. These are areas of competence for the IEEE Antennas and Propagation Society (AP-S). AWPL aims to be one of the "fastest" journals among IEEE publications. This means that for papers that are eventually accepted, it is intended that an author may expect his or her paper to appear in IEEE Xplore, on average, around two months after submission.