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为了克服经验法推算结构物埋深的缺陷,基于检测对象的雷达反射波形特征,通过提取反射波形上的少量特征点,提出一种估算结构物埋深的新方法,并考虑实际检测中结构物反射波形的畸变,对估算精度进行分析评价.结果表明:对于理想的无畸变检测数据,该方法对结构物埋深、水平位置及电磁波速的估算结果较为精确;当反射波形存在畸变时,该方法对埋深的直接估算结果误差较大,平均误差达到55.202%,但对于电磁波速的估算结果较为精确;对于实测的有畸变检测数据,可通过电磁波速估算结果及测得的目标体双程旅时对埋深进行间接估算,估算精度满足雷达法检测对埋深估算的要求.相比经验法,该方法在估算精度、误差控制方面具有显著优势.
In order to overcome the shortcomings of estimating the depth of the structure by the experience method, a new method of estimating the depth of the structure is proposed based on the characteristics of the radar reflection waveform of the detection object by extracting a few feature points on the reflection waveform. The results show that the proposed method can accurately estimate the depth, the horizontal position and the electromagnetic wave velocity of the structure for the ideal undistorted detection data. When the reflected waveform is distorted, The error between the method and the depth estimation is 55.202%, but the estimation of the electromagnetic wave velocity is more accurate. For the measured data with the distortion, the electromagnetic wave velocity estimation results and the measured two-way target Indirect estimation of the buried depth at the time of the trip and the accuracy of the estimation meet the requirements of the depth estimation by the radar method. Compared with the empirical method, this method has significant advantages in terms of estimation accuracy and error control.