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用天线阵技术无损探测大桥钢筋网的三维分布

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用天线阵技术无损探测大桥钢筋网的三维分布

内容简介:常规的探地雷达发射的电磁波和接收的电磁波均为同一频率,因此影响了探测的精度、效率。天线阵探地雷达将不同频率的天线组合到一起工作,实现了一次扫描得到4张雷达图,使深部、浅部探测一次同时完成,提高了探测精度和工作效率,节约了探测成本。另外,由于不同频率的天线对不同深度的被探测体有足够的分辨率,不同位置的天线对同一被探测体进行全区域、多角度的探测,所以天线阵探地雷达能够分辨上下重叠或位置很近的被探测体,使得对一个区域的钢筋网进行三维探测成为可能。

Abstract:The accuracy and efficiency of detection are affected because emitted electromagnetic waves and received electromagnetic waves have the same frequencies for the conventional GPR. For antenna array GPR ,antennas of different frequencies are combined to get four radar charts after a scanning. Based on the technology of antenna array, deep and shallow detections are finished in the same time,then the accuracy and efficiency of detection are raised and detection cost is saved. Moreover,because antennas of different frequencies have enough resolutions with differently deep detected bodies,and antennas of different positions can carry out wholly regional and multi-angle detections with the same detected body,the overlapped or nearby detected bodies can be distinguished by antenna array GPR. As a result,it is practicable for antenna array GPR to achieve 3D detection of steel mesh.

作者:何传江, 巴特, 利奕年,

关键词:天线阵, 探地雷达, 钢筋网, 三维探测,

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