公开(公告)号：JPH0854473A

公开(公告)日：1996-02-27

申请号：JP15466895

申请日：1995-06-21

Applicant: WESTERN ATLAS INT INC

Inventor： UIRIAMU ETSUCHI DORAGOSETSUTO ,  RONARUDO II CHIEINBAASU

IPC: G01V1/36 ,  G01V1/38

Abstract: PURPOSE: To remove the noise corresponding to the undesirable abnormal transient-phenomenon, by combining the pressure sign and the speed sign inside of the weighting area window. CONSTITUTION: The earthquake data from the different kinds of sensors installed together, is formatted into the common speed receiver aggregate and the common pressure receiver aggregate. The first ratio between the speed sign amplitude and the pressure sign amplitude, is measured in the fixed analysis window. And the second ratio is measured between the pressure sign and the speed sign relating to the area weighted within a limited extent. The first ratio and second ratio are combined to form an operator. And the data of the time scale having no transient phenomenon, is specified by combining the data in the weighting area of the common pressure receiver, with that scaled in the weighting area of the common speed receiver in presence of the equalized operator.