公开(公告)号：US06253156B1

公开(公告)日：2001-06-26

申请号：US09460514

申请日：1999-12-14

申请人： Van Bui-Tran ,  Thi Thu Nguyen ,  Gérard Thierry

发明人： Van Bui-Tran ,  Thi Thu Nguyen ,  Gérard Thierry

IPC分类号： G01V128

CPC分类号： G01V1/32 ,  G01V1/26 ,  G01V2210/48

摘要： Method and device intended for synchronized acquisition of seismic signals by one or more acquisition units suited for seismic signal digitizing, allowing to obtain, for each signal, a series y[n] of samples of these signals readjusted from a reference time on, from a first series x[n] of digitized samples of this seismic signal produced from any initial time prior to the reference time. The method essentially comprises detecting a synchronization signal indicative of this reference time (TR), measuring the effective time difference (D) between the reference time and the initial time, determining coefficients of a digital filter (F) suited to compensate for the fractional part (d) of the measured effective time difference, and applying this compensation digital filter to the first series of samples, which allows to obtain a series of digitized samples readjusted from the reference time. In order to accelerate determination of the filter coefficients depending on the difference D observed, the coefficients of a certain number of intermediate filters corresponding to determined fractions of the sampling interval are preferably precalculated. The method can be applied for seismic prospecting or monitoring, earthquake detection, etc.

摘要翻译： 用于通过适合于地震信号数字化的一个或多个采集单元来同步采集地震信号的方法和装置，允许从每个信号获得从参考时间开始从这些信号重新调整的这些信号的一系列y [n]样本 从参考时间之前的任何初始时间产生的该地震信号的数字化样本的第一系列x [n]。 该方法基本上包括检测指示该参考时间（TR）的同步信号，测量参考时间和初始时间之间的有效时间差（D），确定适于补偿分数部分的数字滤波器（F）的系数 （d）测量的有效时间差，并将该补偿数字滤波器应用于第一系列样本，这允许从参考时间重新调整一系列数字化采样。 为了根据观察到的差异D加速滤波器系数的确定，优选地对与取样间隔的确定分数相对应的一定数量的中间滤波器的系数进行预先计算。 该方法可应用于地震勘探或监测，地震检测等。

公开(公告)号：US6061299A

公开(公告)日：2000-05-09

申请号：US958038

申请日：1997-10-27

申请人： Christian Grouffal ,  Van Bui-Tran

发明人： Christian Grouffal ,  Van Bui-Tran

IPC分类号： G08C15/00 ,  G01V1/22 ,  H04Q9/00

CPC分类号： G01V1/22

摘要： The invention relates to a two-phase method of transmitting, to a central station (CS), seismic signals received by seismic receivers (R) and picked up by collecting units (A) disposed in the field. In the first phase, a compression is applied to each seismic trace, the ratio of which is adapted to the duration of a transmission window placed in the time intervals between successive seismic transmission-reception cycles, as well as to the rate of the transmission route used. The compressed trace as a whole is thus transmitted, allowing an operator at central station (CS) to check qualitatively that recording took place correctly in each collecting unit (A) even though he does not have the exact trace available. In the second phase, at the end of the current seismic session for example, the seismic traces are reconstituted in the central station with the necessary accuracy, either by complete transmission of the data preferably after prior compression, or, in certain cases, by transmission of residues eliminated in the first phase for the requirements of the first transmission.

摘要翻译： 本发明涉及向中心站（CS）发送由地震接收机（R）接收并由设置在现场的收集单元（A）拾取的地震信号的两相方法。 在第一阶段，对每个地震迹线施加压缩，其比例适应于在连续的地震发射 - 接收周期之间的时间间隔内放置的传输窗口的持续时间，以及传输路径的速率 用过的。 因此，整个压缩轨迹被传输，允许中央站（CS）的操作员定性地检查每个收集单元（A）中的记录是否正确地发生，即使他没有准确的跟踪可用。 在第二阶段，例如在当前地震会话结束时，地震迹线以必要的精度在中心站重建，优先在完成传输数据之后，或者在某些情况下，通过传输 的第一阶段消除的残留物用于第一次传输的要求。