摘要
希尔伯特 (Hilbert)变换在本质上是一种全通滤波器 ,能更有效地、真实地获取信号中所含的信息。本文介绍了提取三瞬信息 (瞬时振幅、瞬时相位、瞬时频率 )的复信号分析方法 ,并将其应用于工程实例。在工程实测的地质雷达资料处理中表明 :(1)多参数分析方法有助于提高地质雷达解释的准确性 ;(2 )瞬时振幅剖面在反映地下裂缝、裂隙方面比时距剖面的清晰 ,准确 ;(3)瞬时相位、瞬时频率能较好地反映地下物性界面的起伏情况 。
The complex informational analytical method of extracting transient amplitude, transient phase and transient frequency is introduced and is applied to the engineer case. After applied in the engineer case. the method shows that： （1） the accuracy of the Georadar interpretation can be improved by multi-parameter analytical method; （2） the transient amplitude section is clearer and more accurate than time section; （3） the topographic feature is clearer in the transient phase and frequency section than in the time section. The subsided region of the roadbed and the quantity of the sedimentation can be judged more accurately also by transient amplitude and frequency.
出处
《工程地球物理学报》
2004年第4期349-352,共4页
Chinese Journal of Engineering Geophysics
