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介绍了基于GPS定时的地下信息探测方法,该方法将伪随机信号作为输入信号,以抑制随机噪声带来的不良影响;同时,使用GPS定时装置对输入、输出进行同步采集,以减小相关计算时的误差。传统的系统辨识方法对噪声的抑制能力不够,得到的辨识结果误差较大,本文提出的基于GPS定时的地下信息探测方法可以在一定程度上抑制噪声。最后通过中间梯度和偶极-偶极的水槽对比试验,验证了基于GPS定时的地下信息探测方法的可行性与可靠性,结果显示本文所述方法有更高的辨识精度,特别是视频散率,本文所述方法得到的值精度更高。
The method of underground information detection based on GPS timing is introduced. The method uses the pseudo-random signal as the input signal to suppress the adverse effects of random noise. At the same time, the GPS timing device is used to synchronize the input and output to reduce the correlation calculation When the error. The traditional method of system identification is not enough to suppress the noise and the error of identification result is large. The underground information detection method based on GPS timing proposed in this paper can restrain the noise to a certain extent. At last, the feasibility and reliability of the underground information detection method based on GPS timing are verified through the experiments of intermediate gradient and dipole-dipole flume. The results show that the method described in this paper has higher recognition accuracy, especially the video dispersion rate , The method described in this article is more accurate.