瞬变电磁法资料的联合时-频分析初探

详细信息

PRELIMINARY STUDY ON JOINT TIMEFREQUENCY ANALYSIS OF TRANSIENT ELECTROMAGNETIC FIELDS

摘要: 依据联合时-频分析原理,研究了几个地电模型瞬态响应信号的时-频分布特征,说明瞬变场信号的时频分布强度在随深度减弱的总趋势下,受电阻率影响有明显变化:电阻率低分布强度大;电阻率高分布强度小。据此建立起瞬变场信号的联合时-频分布与地电结构的关系,可以更好地解释瞬变场资料。
- 瞬变电磁场 /
- 时-频分析 /
- 解
Abstract: On the base of the introduction of joint time-frequency analysis principle,the behaviors of time-frequency distribution on transient response signals of several geoelectric models are studied.It is demonstrated that under the general trend of the time-frequency distribution strength weakened with the depth,the strength is changed obviously by the effect of resistivity,the strength is larger when the resistivity is lower and vice versa. Thus,the relationship between the joint time-frequency distribution of transient fields and geoelectric structure is established and the transient field data could be interpreted better.
- transient electromagnetic field /
- interpretation /
- time-frequency analysis