EP 0981769 A1 20000301 - SEISMIC PROBE COMPRISING A SEISMIC SENSOR AND EARTH MAGNETIC FIELD SENSOR
Title (en)
SEISMIC PROBE COMPRISING A SEISMIC SENSOR AND EARTH MAGNETIC FIELD SENSOR
Title (de)
SEISMISCHES SONDE MIT EINEM SEISMISCHEN DETEKTOR UND EINEM ERDMAGNETFELD-DETEKTOR
Title (fr)
SONDE DE TYPE SISMIQUE COMPORTANT UN DETECTEUR SISMIQUE ET UN DETECTEUR DU CHAMP MAGNETIQUE TERRESTRE
Publication
Application
Priority
- FR 9801001 W 19980520
- FR 9706426 A 19970522
Abstract (en)
[origin: FR2763701A1] The invention concerns a seismic probe (70) comprising, integral with its body (71) or mounted detachable thereon, a device sensing (86) the direction and intensity of the earth's magnetic field, for determining the spatial orientation of its seismic cell (81) connected through a two-path amplifying chain to a surface computer unit by a double transmission system with analog channel and frequency modulation channel particular to each path. This invention is useful for manufacturers of seismic probes, users concerned with seismic risks or local fractures and movements above the ground or underground.
IPC 1-7
IPC 8 full level
G01V 1/52 (2006.01)
CPC (source: EP)
G01V 1/52 (2013.01)
Citation (search report)
See references of WO 9853345A1
Designated contracting state (EPC)
DE ES GB IT
DOCDB simple family (publication)
FR 2763701 A1 19981127; FR 2763701 B1 19990827; CA 2288959 A1 19981126; EP 0981769 A1 20000301; WO 9853345 A1 19981126
DOCDB simple family (application)
FR 9706426 A 19970522; CA 2288959 A 19980520; EP 98925748 A 19980520; FR 9801001 W 19980520