GB2022359A - Geophone with shaped magnetic field - Google Patents
Geophone with shaped magnetic fieldInfo
- 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- Withdrawn
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>
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06323897A (en) * | 1993-05-17 | 1994-11-25 | N D R:Kk | Vibration/impact detection sensor |
-
1978
- 1978-12-05 DE DE19782852565 patent/DE2852565A1/en not_active Withdrawn
-
1979
- 1979-01-12 GB GB7901222A patent/GB2022359A/en not_active Withdrawn
- 1979-03-06 NL NL7901771A patent/NL7901771A/en not_active Application Discontinuation
- 1979-03-08 FR FR7905951A patent/FR2424550A1/en not_active Withdrawn
- 1979-03-30 BE BE0/194337A patent/BE875235A/en unknown
Cited By (10)
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 |
---|---|
BE875235A (en) | 1979-07-16 |
FR2424550A1 (en) | 1979-11-23 |
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) |