FR2424550A1 - GEOPHONE WITH MAGNETIC FIELD SHAPED - Google Patents

GEOPHONE WITH MAGNETIC FIELD SHAPED

Info

Publication number
FR2424550A1
FR2424550A1 FR7905951A FR7905951A FR2424550A1 FR 2424550 A1 FR2424550 A1 FR 2424550A1 FR 7905951 A FR7905951 A FR 7905951A FR 7905951 A FR7905951 A FR 7905951A FR 2424550 A1 FR2424550 A1 FR 2424550A1
Authority
FR
France
Prior art keywords
geophone
magnetic field
field
field shaped
coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR7905951A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mark Products Inc
Original Assignee
Mark Products Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mark Products Inc filed Critical Mark Products Inc
Publication of FR2424550A1 publication Critical patent/FR2424550A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
    • G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
    • G01V1/181—Geophones
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
    • G01H11/02—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by magnetic means, e.g. reluctance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
    • G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
    • G01V1/181—Geophones
    • G01V1/182—Geophones with moving coil

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

CETTE INVENTION CONCERNE UN GEOPHONE DU TYPE COMPORTANT UNE BOBINE SE DEPLACANT A TRAVERS UN CHAMP MAGNETIQUE. SUIVANT L'INVENTION, LES AIMANTS UTILISES POUR PRODUIRE LE CHAMP MAGNETIQUE SONT DISPOSES DE FACON A ASSURER LA MISE EN FORME DE CE CHAMP DE TELLE SORTE QUE LA DENSITE DU FLUX DU CHAMP A TRAVERS LEQUEL LA BOBINE SE DEPLACE SOIT AUGMENTEE, POUR AUGMENTER EGALEMENT LE SIGNAL DE SORTIE DU GEOPHONE. CE GEOPHONE A SIGNAL AMELIORE EST UTILISABLE POUR TOUTES LES APPLICATIONS USUELLES DE CE TYPE D'APPAREILS.THIS INVENTION CONCERNS A GEOPHONE OF THE TYPE INCLUDING A COIL MOVING THROUGH A MAGNETIC FIELD. FOLLOWING THE INVENTION, THE MAGNETS USED TO PRODUCE THE MAGNETIC FIELD ARE AVAILABLE IN A WAY TO ENSURE THE SHAPING OF THIS FIELD SO THAT THE DENSITY OF THE FLOW OF THE FIELD THROUGH WHICH THE COIL IS MOVING IS INCREASED, TO ALSO INCREASE THE GEOPHONE EXIT SIGNAL. THIS GEOPHONE WITH IMPROVED SIGNAL CAN BE USED FOR ALL USUAL APPLICATIONS OF THIS TYPE OF DEVICE.

FR7905951A 1978-04-27 1979-03-08 GEOPHONE WITH MAGNETIC FIELD SHAPED Withdrawn FR2424550A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US90051278A 1978-04-27 1978-04-27

Publications (1)

Publication Number Publication Date
FR2424550A1 true FR2424550A1 (en) 1979-11-23

Family

ID=25412642

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7905951A Withdrawn FR2424550A1 (en) 1978-04-27 1979-03-08 GEOPHONE WITH MAGNETIC FIELD SHAPED

Country Status (5)

Country Link
BE (1) BE875235A (en)
DE (1) DE2852565A1 (en)
FR (1) FR2424550A1 (en)
GB (1) GB2022359A (en)
NL (1) NL7901771A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0625698A2 (en) * 1993-05-17 1994-11-23 N.D.R. Co. Ltd. Vibration/impact detecting sensor

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214724A (en) * 1988-01-28 1989-09-06 Custom Dev Ltd Permanent magnet electric motor
JPH11258353A (en) * 1998-03-10 1999-09-24 Tomoo Matsuo Earth storm display device and earth fluctuation prediction device using the same
US6922374B2 (en) * 2001-04-09 2005-07-26 Input/Output, Inc. Double-ended geophone
DE102006016355A1 (en) * 2006-04-05 2007-10-18 Vega Grieshaber Kg vibration sensor
DE102009008789A1 (en) * 2009-02-13 2010-09-02 Geolab S.A.S. Acoustic sensor e.g. seismometer, for use in measuring arrangement to detect seismic waves, has coil arranged at magnetic field and moved relative to magnetic field produced by two magnets, which face each other with same polarity
US8208347B2 (en) 2009-07-08 2012-06-26 Geospace Technologies, Lp Geophone having improved damping control
US8098546B2 (en) 2009-07-08 2012-01-17 Geospace Technologies, Lp Geophone having improved sensitivity
US8050144B2 (en) 2009-07-08 2011-11-01 Geospace Technologies Lp Vertical geophone having improved distortion characteristics
SE538479C2 (en) * 2013-06-20 2016-07-26 Uhlin Per-Axel Vibration sensor for sensing vibrations in the vertical and horizontal joints of the vibration sensor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0625698A2 (en) * 1993-05-17 1994-11-23 N.D.R. Co. Ltd. Vibration/impact detecting sensor
EP0625698A3 (en) * 1993-05-17 1996-03-27 N D R Co Ltd Vibration/impact detecting sensor.

Also Published As

Publication number Publication date
GB2022359A (en) 1979-12-12
NL7901771A (en) 1979-10-30
DE2852565A1 (en) 1979-10-31
BE875235A (en) 1979-07-16

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Legal Events

Date Code Title Description
ST Notification of lapse