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分析铁路路基雷达探测数据失真的主要原因,参考雷达探测在其他领域里的应用成果,设计相应的数据处理方法,最大限度地消除其影响。对轨枕中钢筋形成的多次波反射,采用抛物线拉冬变换法消除。对铁路沿线设施和通讯工具产生的随机噪声,采用小波域KL变换的方法去除。为弥补雷达探测剖面图对薄层和深层分辨率的不足,采用高通滤波和瞬时相位法加以提高。分别设计相应的数据处理算法步骤,采用VC和MATLAB混合编程技术实现。对2000年沪宁线路基雷达检测数据处理的结果表明:设计的数据处理方法具有计算速度快、通用性强、参数少的特点;处理后的雷达探测数据图像深部信号强、界面分层清晰,显示病害位置突出。
Analysis of the main causes of railway subgrade radar detection data distortion, reference radar detection in other areas of application results, design the appropriate data processing methods to minimize its impact. Reinforced sleepers formed on the multiple reflections, the use of parabolic drag transformation. Random noise generated by facilities and communication facilities along the railway line is removed by using the KL transform of the wavelet domain. In order to make up for the lack of resolution of thin and deep layers in radar profile, high-pass filter and instantaneous phase method are used to improve. Respectively, design the appropriate data processing algorithm steps, using VC and MATLAB hybrid programming technology. The results show that the designed data processing method has the characteristics of fast calculation, high universality and few parameters. The signal of the processed radar detection data is strong in the deep and the interface is well layered. Show disease prominent position.