“时分”式多通道数据采集器的附加相位移及其对大地电磁数据处理结果的影响
THE ADDITIONAL DISPLACEMENT CREATED BY “TIME-DIVISION” MODE MULTI-CHANNEL DATA ACQUISITION SYSTEM ANDeTHE EFFECT FOR THEGEOELECTRICAL DATA PROCESSING
-
摘要: 本文讨论了"时分"式多通道数据采集系统讨于相关信号同步采集时的"伪同步"现象及其所产生的附加相位移;同时以实测MT资料的数据处理结果验证了采集器的附加相位移对大地电磁数据处理结果的影响,得出了有意义的结论:(1)采集器的"伪同步"采集所引进的附加相位移对大地电磁测深结果中的阻抗相位曲线有显著影响。(2)附加相位移对大地电磁测深数据处理结果中视电阻率曲线的影响不明显。由于第(1)方面的原因,所以在大地电磁测深数据处理中必须对采集器"伪同步"采集所引进的附加相位移进行校正。本文给出了附加相位移的定量计算公式。Abstract: In this paper, we have discussed the pseudo-synchronism and the addit-ional phase displacement created by "time-division" mode multi-channel data acquisition system when collecting the relative signals, the effect of additional phase displacement of data acquisition system on the results of MT data analyzed was tested by the MT records observed.we conclude that: The effect of the additional phase displacement, caused by pseudo-synchro-nism of data acquisition system, on impedance phase curve for magnetcotellu-ric deep sounding is notable.2) The effect of additional phase displacement on apparent resiseivity curve in the processing the magnetotelluric deep so-unding data is not obvious.
-
[1] 陶楚良编著,数据采集系统及其器件,第一章,1938年8月第一版,北京工业学院出版社。 [2] 程乾先生编著,"信号数字处理的数学原理",第1、2、3、5、7章,石油工业出版社,1979. [3] 郑治真编,"波谱分析基础",地震出版社,1979. [4] Sims, W.E, Bostick, F.X, and Simith, H·W·"The estimation of magneto telluris imqedance tensor elements from measured data".Geoqhysics. vol, 36, No.5(Octoberl971),P; 938~942. [5] 刘国栋,陈乐寿主编 "大地电磁测深研究",地震出版社,1984. [6] 陈乐寿、刘任,王天生编著,"大地电磁测深资料处理与解释",石油工业出版社,1989. -

计量
- 文章访问数: 1440
- HTML全文浏览量: 240
- PDF下载量: 88