公开(公告)号：US20210302609A1

公开(公告)日：2021-09-30

申请号：US17261933

申请日：2019-07-03

Applicant: SERCEL

Inventor： Thomas BARDAINNE ,  Baptiste RONDELEUX

IPC: G01V1/30 ,  G01V1/28 ,  G01V1/36

Abstract: In order to monitor the subsoil of the earth under a target zone, seismic waves coming from an identified mobile noise source are recorded by means of at least one pair of sensors disposed on either side of the target zone, time periods are selected corresponding to the alignments of the pairs of sensors with the noise source, a seismogram of the target zone is reconstructed by interferometry based on the recorded seismic waves and on the selected time periods and an image of the subsoil of the target zone is generated using the seismogram.

公开(公告)号：US20230278606A1

公开(公告)日：2023-09-07

申请号：US18005870

申请日：2021-07-23

Applicant: SERCEL

Inventor： Thomas BARDAINNE

IPC: B61L23/04

CPC classification number: B61L23/045

Abstract: The invention relates to a method for monitoring the physical state of a longitudinal element (IO) of a railway-type rail, the method having a step of detecting mechanical waves moving along the longitudinal element (IO), in particular due to the passing of a train, by means of an array of mechanical wave sensors placed along and in contact with the longitudinal element, the array having at least one first pair (A) of sensors each positioned at one end of a first portion (IOa) of the longitudinal element (IO), and a step of processing the signals emitted by the sensors in the array of sensors, the processing step having the determination of at least one first interfered signal determined from signals provided by the sensors in the first pair (A) of sensors over a first predetermined period of time.