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Noise and Interference Reduction in Air-Launched Antennas Used for GPR Evaluation of Roads and Bridges

机译：用于GPR对道路和桥梁的GPR评估的空气发射天线的噪声和干扰减少

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摘要

Ground penetrating radar (GPR) is an accepted nondestructive technique commonly used to evaluate roads and bridges. The most common GPR antennas used for these applications are air-launched horn antennas which are safely operated at highway speeds. Though the 2 GHz horn antenna can resolve features to 1 in. (2.5 cm) resolution, the conventional horn antenna is subject to interference that is predominantly caused by TV and FM broadcasting. A new interference cancellation technology, which incorporates both hardware and software, greatly reduces the influence of the interference sources that previously plagued horn antennas while improving the sharpness and resolution beyond that of even the conventional antenna. A measurement system was developed, which compares the conventional horn antenna to the new interference cancellation horn antenna around the harshest interference in the Boston area. It is found that while the conventional horn antenna yields acceptable or excellent results 80% of the time for this specific test route, the interference cancellation technology yields 93% high-performance data.
机译：地面穿透雷达（GPR）是常用于评估道路和桥梁的可接受的非破坏性技术。用于这些应用的最常见的GPR天线是空气发射的喇叭天线，其在公路速度下安全地操作。虽然2 GHz喇叭天线可以将特征解析为1英寸（2.5cm）分辨率，但传统的喇叭天线受到主要由电视和FM广播引起的干扰。一种新的干扰消除技术，它包括硬件和软件，大大降低了先前困扰角天线的干扰源的影响，同时提高了甚至传统天线的锐度和分辨率。开发了一种测量系统，它将传统的喇叭天线与新的干扰消除喇叭天线围绕波隆顿区域的最严重干扰进行比较。结果发现，虽然传统的喇叭天线产生了80％的特定测试路线的时间可接受或优异的结果，但干扰消除技术产生93％的高性能数据。

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