中文摘要：

粮仓的电磁探测技术是储粮检测领域的研究热点问题。本研究针对粮仓电磁探测技术中，回波图像解释困难这一瓶颈问题展开研究，选取我国最常见浅圆形粮仓，采用时域有限差分（FDTD）法进行仓内电磁波回波图像仿真。针对探仓雷达常采取的2种探测路径，分析了仓顶、仓壁、仓底在二维回波图像中的位置和形态，并通过对实际探仓数据的分析，证实了粮仓电磁探测环境的FDTD仿真分析能够为探仓雷达回波图像的解释提供依据，为提高探仓雷达回波预处理精度及有效目标回波的合理提取提供技术支持。

英文摘要：

Electromagnetic detection technology of barn has been a hot issue in field of grain storage detection. The difficult interpretation of barn penetrating radar image would be the bottleneck of barn electromagnetic detection technology. To solve this problem, the paper has chosen common squat warehouse to simulate natural environment of barn. Finite Difference Time Domain （FDTD） method has been used to simulate radar reflection wave, including roof, wall and bottom reflection base on the two different detection paths. The position and configuration of different barn structure in barn penetrating radar image have been analyzed. Through analysis of the actual barn penetrating ra- dar image data, the results proved that the FDTD simulation of barn electromagnetic detection could provide a basis for image interpretation, further to improve the pretreatment accuracy of radar image, as well as to offer technical sup- port on reasonable extracting valid target.