王晨露, 陈先中, 侯庆文, 王正鹏. 基于高炉料线的RCS测量及SAR成像验证[J]. 工程科学学报, 2018, 40(8): 979-988. DOI: 10.13374/j.issn2095-9389.2018.08.012
引用本文: 王晨露, 陈先中, 侯庆文, 王正鹏. 基于高炉料线的RCS测量及SAR成像验证[J]. 工程科学学报, 2018, 40(8): 979-988. DOI: 10.13374/j.issn2095-9389.2018.08.012
WANG Chen-lu, CHEN Xian-zhong, HOU Qing-wen, WANG Zheng-peng. RCS measurement and SAR imaging verification based on blast furnace stock line[J]. Chinese Journal of Engineering, 2018, 40(8): 979-988. DOI: 10.13374/j.issn2095-9389.2018.08.012
Citation: WANG Chen-lu, CHEN Xian-zhong, HOU Qing-wen, WANG Zheng-peng. RCS measurement and SAR imaging verification based on blast furnace stock line[J]. Chinese Journal of Engineering, 2018, 40(8): 979-988. DOI: 10.13374/j.issn2095-9389.2018.08.012

基于高炉料线的RCS测量及SAR成像验证

RCS measurement and SAR imaging verification based on blast furnace stock line

  • 摘要: 围绕高炉雷达料面监测系统成像需求,针对高炉雷达测量目标的雷达横截面积(radar cross section,RCS)展开应用研究,首次实现了微波暗室中高炉料线RCS的高精度自动化测量,为高炉雷达目标特性的深入研究奠定了硬件基础.基于比较法测得10 GHz处的焦炭、烧结矿颗粒的RCS典型值分布以及高炉料线散射方向性图,测量动态范围为-10~15 dB.通过RCS测量和成像诊断等方法对工业现场布焦、布矿的雷达回波信号强度差别大等问题进行了探索和分析.模拟工业现场的焦炭、烧结矿等平台加漏斗的料线形状,对散装物料进行了等比例缩小的实际摆放,对典型料线缩比模型进行了合成孔径雷达(synthetic aperture radar,SAR)成像验证,并深入分析了成像缺失和成像误差原因,得知漏斗部分在低频情况下成像效果不理想,需要提高测试频段;利用标准球模拟料线分析成像误差,方位向和距离向绝对误差在1.2%和5.8%以内,暗室内方位向测量误差不超过±0.01 m.

     

    Abstract: Based on the requirements of blast furnace burden surface monitoring imaging, this study investigated the measurement of the radar cross section (RCS) of the blast furnace radar target. For the first time, a highly precise automatic measurement of the RCS of a blast furnace stock line in a microwave anechoic chamber was realized. Based on this, the characteristics of the blast furnace radar target were studied. The RCS typical distribution of coke and sinter particles and the scattering directivity pattern of the blast furnace stock line at 10 GHz were measured based on a comparative method, and the measured dynamic range was -10-15 dB. Problems such as the intensity difference of radar echo signals between the coke and sinter distribution in the industrial field were explored and analyzed by the RCS measurement and imaging diagnosis. The stock line shape of coke and sinter on the industrial site, known as platform plus funnel type, was simulated, and bulk materials were placed and scaled down. Synthetic aperture radar (SAR) imaging verification was performed on the shrinkage ratio model of the typical stock line, and the reasons for imaging loss and error were deeply analyzed. At a low frequency, the imaging of the funnel section is not satisfactory; hence the test frequency band should be improved. A blast furnace stock line made of standard balls was used to analyze the imaging errors. The absolute errors in the azimuth and range directions are 1.2% and 5.8%, respectively, and the azimuth measurement error in the anechoic chamber does not exceed ±0.01 m.

     

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