自适应单轨多幅探地雷达设计

Design of adaptive single-track multi-amplitude ground penetrating radar

为了减小传统探地雷达单发单收带来的误差和不确定性,提出一种基于阵列天线的自适应单轨多幅探地雷达。该探地雷达由阵列天线、切换开关及雷达主机构成。切换开关网络包含天线选择单刀多掷开关和双刀双掷收发通道选择切换开关。雷达通过开关切换使得阵列的任意天线单元对可处于发射和接受状态,结合分时数据联合处理可在单轨测试过程中获取不同水平相对位置和不同垂直深度的收发探测结果参数。系统先后工作于地质探测学习过程和目标探测过程,分别提供多幅高精度地质参数探测结果和目标探测结果,进一步可以通过对不同相对位置测试点的测试数据聚焦获得3D数据。得益于地质参数学习和收发间距切换,该探地雷达相较于传统探地雷达大大提升了探测精度和探测效率。

In order to reduce the error and uncertainty caused by single transmission and single reception of the traditional ground penetrating radar(GPR),an adaptive single-track multi-amplitude GPR based on array antenna is proposed. The GPR is composed of an array antenna,several switches and a radar host. The switch network includes single-pole multi-throw switch for antenna selection and double-pole double-throw switch for transceiving channel selection. By switching the radar switch,any antenna unit pair of the array can be in the transmitting and receiving states. In combination with time-division data joint processing,the parameters of receiving and transmitting detection results at different horizontal relative positions and different vertical depths can be obtained in the process of single-track test. The system works in the geological exploration learning process and the target detection process successively to provide a plurality of high-precision geological parameter detection results and target detection results respectively,and can further obtain 3D data by focusing the test data of test points at different relative positions. The GPR can improve the detection accuracy and efficiency greatly in comparison with the traditional GPR,which benefits from the study of geological parameters and the switching of transmitting and receiving interval distance.