研制了一种基于开关切换天线阵的小型化三维探地雷达系统。该系统采用了单发多收开关天线线阵,可以快速获得三维数据,高分辨识别并定位地下目标;提出了一种有效的三维成像算法,使用主成分分析的方法去除直达波,利用改进的加权后向投影算法对三维数据聚焦成像。实验室实验和外场实验的结果表明:该系统操作方便、灵活,可以准确地检测并精确地定位地下目标,误差在0. 02 m 以内,具有一定的实用价值。

In this paper, a miniaturized three-dimensional ground penetrating radar system based on switched antenna array (SAA) is developed. The system uses a SAA consisting of single transmitting antenna and multiple receiving antennas, which can not only quickly obtain three-dimensional data but also identify and locate underground targets with high resolution. A three-dimensional imaging algorithm suitable for this system is proposed, which uses the principal component analysis method to remove the direct wave, and uses the improved weighted back projection algorithm to focus the three-dimensional data. The results of laboratory experiments and field experiments show that the flexible system is easy to operate and can accurately detect and locate the underground target with an error no more than 0. 02 m, proving a certain practical value of the system.

TN953