GB2022359A - Geophone with shaped magnetic field - Google Patents

Geophone with shaped magnetic field

Info

Publication number
GB2022359A
GB2022359A GB7901222A GB7901222A GB2022359A GB 2022359 A GB2022359 A GB 2022359A GB 7901222 A GB7901222 A GB 7901222A GB 7901222 A GB7901222 A GB 7901222A GB 2022359 A GB2022359 A GB 2022359A
Authority
GB
United Kingdom
Prior art keywords
geophone
magnetic field
shaped magnetic
magnets
shaped
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Withdrawn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
GB7901222A
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 GB2022359A publication Critical patent/GB2022359A/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Withdrawn legal-status Critical Current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

Two or more magnets 26, 22, 27 are used to produce the high flux density magnetic field through which a coil 40 moves whereby the output signal of the geophone is increased. The auxiliary magnet or magnets (i.e. 26, 27) may be ring-shaped and two separate moving coils may be used. <IMAGE>
GB7901222A 1978-04-27 1979-01-12 Geophone with shaped magnetic field Withdrawn GB2022359A (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
GB2022359A true GB2022359A (en) 1979-12-12

Family

ID=25412642

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7901222A Withdrawn GB2022359A (en) 1978-04-27 1979-01-12 Geophone with shaped magnetic field

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 (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
FR2776078A1 (en) * 1998-03-10 1999-09-17 Tomoo Matsuo APPARATUS FOR PREDICTING LAND CHANGE
EP1249714A3 (en) * 2001-04-09 2004-08-11 Input/Output, Inc. Double-ended geophone
US7598820B2 (en) 2006-04-05 2009-10-06 Exxonmobil Research And Engineering Company Magnetic drive for high and low temperature mechanical oscillators used in sensor applications
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
US8050144B2 (en) 2009-07-08 2011-11-01 Geospace Technologies Lp Vertical geophone having improved distortion characteristics
US8098546B2 (en) 2009-07-08 2012-01-17 Geospace Technologies, Lp Geophone having improved sensitivity
US8208347B2 (en) 2009-07-08 2012-06-26 Geospace Technologies, Lp Geophone having improved damping control
EP3011285A4 (en) * 2013-06-20 2017-03-15 Uhlin, Per-Axel Vibration sensor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06323897A (en) * 1993-05-17 1994-11-25 N D R:Kk Vibration/impact detection sensor

Cited By (10)

* 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
FR2776078A1 (en) * 1998-03-10 1999-09-17 Tomoo Matsuo APPARATUS FOR PREDICTING LAND CHANGE
EP1249714A3 (en) * 2001-04-09 2004-08-11 Input/Output, Inc. Double-ended geophone
US6922374B2 (en) 2001-04-09 2005-07-26 Input/Output, Inc. Double-ended geophone
US7598820B2 (en) 2006-04-05 2009-10-06 Exxonmobil Research And Engineering Company Magnetic drive for high and low temperature mechanical oscillators used in sensor applications
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
US8050144B2 (en) 2009-07-08 2011-11-01 Geospace Technologies Lp Vertical geophone having improved distortion characteristics
US8098546B2 (en) 2009-07-08 2012-01-17 Geospace Technologies, Lp Geophone having improved sensitivity
US8208347B2 (en) 2009-07-08 2012-06-26 Geospace Technologies, Lp Geophone having improved damping control
EP3011285A4 (en) * 2013-06-20 2017-03-15 Uhlin, Per-Axel Vibration sensor

Also Published As

Publication number Publication date
FR2424550A1 (en) 1979-11-23
BE875235A (en) 1979-07-16
DE2852565A1 (en) 1979-10-31
NL7901771A (en) 1979-10-30

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)