FR2205671B1 - - Google Patents

Info

Publication number
FR2205671B1
FR2205671B1 FR7339114A FR7339114A FR2205671B1 FR 2205671 B1 FR2205671 B1 FR 2205671B1 FR 7339114 A FR7339114 A FR 7339114A FR 7339114 A FR7339114 A FR 7339114A FR 2205671 B1 FR2205671 B1 FR 2205671B1
Authority
FR
France
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.)
Expired
Application number
FR7339114A
Other versions
FR2205671A1 (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.)
Schonstedt Instrument Co LLC
Original Assignee
Schonstedt Instrument Co LLC
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 Schonstedt Instrument Co LLC filed Critical Schonstedt Instrument Co LLC
Publication of FR2205671A1 publication Critical patent/FR2205671A1/fr
Application granted granted Critical
Publication of FR2205671B1 publication Critical patent/FR2205671B1/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/081—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices the magnetic field is produced by the objects or geological structures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/04—Measuring direction or magnitude of magnetic fields or magnetic flux using the flux-gate principle
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/15—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for use during transport, e.g. by a person, vehicle or boat

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Electromagnetism (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Measuring Magnetic Variables (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
FR7339114A 1972-11-03 1973-11-02 Expired FR2205671B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US303598A US3894283A (en) 1972-11-03 1972-11-03 Magnetic locator including sensors mounted in longitudinal grooves of a tubular support

Publications (2)

Publication Number Publication Date
FR2205671A1 FR2205671A1 (fr) 1974-05-31
FR2205671B1 true FR2205671B1 (fr) 1976-06-18

Family

ID=23172833

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7339114A Expired FR2205671B1 (fr) 1972-11-03 1973-11-02

Country Status (6)

Country Link
US (1) US3894283A (fr)
JP (2) JPS4979267A (fr)
CA (1) CA1006915A (fr)
DE (1) DE2355630C3 (fr)
FR (1) FR2205671B1 (fr)
GB (2) GB1446742A (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3961245A (en) * 1974-11-20 1976-06-01 Schonstedt Instrument Company Magnetic locator having improved sensors
US3988663A (en) * 1975-03-19 1976-10-26 Texaco Inc. Locator for metallic pipe with AC signals impressed
US4163877A (en) * 1978-01-11 1979-08-07 Schonstedt Instrument Company Housing for circuitry and loudspeaker of a magnetic locator shields and resiliently mounts the loudspeaker
FR2492540A1 (fr) * 1980-10-17 1982-04-23 Schlumberger Prospection Dispositif pour diagraphie electromagnetique dans les forages
US4443762A (en) * 1981-06-12 1984-04-17 Cornell Research Foundation, Inc. Method and apparatus for detecting the direction and distance to a target well casing
GB2135460B (en) * 1983-01-20 1987-10-07 Scopemoor Ltd Detecting hidden objects
DE3482902D1 (de) * 1983-01-20 1990-09-13 Scopemoor Ltd Detektor fuer vergrabene gegenstaende.
US5106175A (en) * 1989-12-28 1992-04-21 At&T Bell Laboratories Locatable object suitable for underground use and methods of locating same
US5136245A (en) * 1990-05-25 1992-08-04 Schonstedt Instrument Company Magnetic detection apparatus with sensors mounted on channel or angle cantilever support
US5097211A (en) * 1990-05-25 1992-03-17 Schonstedt Instrument Company Magnetic detection appartaus with plastic housing and sound-transmissive handle
US5138761A (en) * 1990-05-25 1992-08-18 Schonstedt Instrument Company Method of manufacturing magnetic detection apparatus
DE4112406A1 (de) * 1991-04-16 1992-10-22 Ebinger Pruef Und Ortungstechn Metalldetektor mit akustischer signalgabe
FR2687478B1 (fr) * 1992-02-18 1997-08-08 Thomson Csf Dispositif de mesure d'un gradient de champ magnetique dont les erreurs de sensibilite et de desalignement sont minimisees.
GB2270981A (en) * 1992-08-12 1994-03-30 Mini Agriculture & Fisheries Locating magnetically tagged concealed equipment.
IL111556A0 (en) * 1994-11-08 1995-07-31 Ramta Israel Aircraft Industry Mine simulation system
US5642608A (en) * 1995-11-01 1997-07-01 Deere & Company Shaft structure for a cotton harvester doffer column
US6819109B2 (en) * 2003-01-23 2004-11-16 Schonstedt Instrument Company Magnetic detector extendable wand
US8653814B2 (en) * 2010-01-06 2014-02-18 Vrhalibis, Llc Housing for a magnetometer, a combination including a magnetometer within a waterproof housing, and a system and method for location and removal of unexploded ordinance underwater
US20120249128A1 (en) * 2011-03-28 2012-10-04 GM Global Technology Operations LLC Magnetic sensor system
US9322632B2 (en) * 2011-12-05 2016-04-26 Gm Global Technology Operations Inc. Linear position sensor assembly having magnetic shield
CN110993304B (zh) * 2019-12-03 2021-11-02 铜陵市多元微分科技有限公司 一种硅钢片堆叠装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2620381A (en) * 1947-05-27 1952-12-02 Fred M Mayes Magnetometer gradiometer apparatus and method
US2642479A (en) * 1948-01-05 1953-06-16 Sun Oil Co Device for detecting or measuring magnetic fields
US2698920A (en) * 1951-03-06 1955-01-04 Ford Alexander Corp Apparatus for exploring pipe in wells
US3184620A (en) * 1962-05-04 1965-05-18 Gen Precision Inc Solid state sine-cosine source
US3281660A (en) * 1964-05-28 1966-10-25 David K Studenick Locator for magnetic and conducting materials including means for adjusting the relative positions of a pair of sensing coils
US3428929A (en) * 1967-05-12 1969-02-18 Amerline Corp Coil receiving structure

Also Published As

Publication number Publication date
DE2355630C3 (de) 1979-08-09
JPS55170675U (fr) 1980-12-08
DE2355630B2 (de) 1978-11-23
DE2355630A1 (de) 1974-07-25
GB1446741A (en) 1976-08-18
GB1446742A (en) 1976-08-18
JPS4979267A (fr) 1974-07-31
JPS5928376Y2 (ja) 1984-08-16
FR2205671A1 (fr) 1974-05-31
US3894283A (en) 1975-07-08
CA1006915A (en) 1977-03-15

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Legal Events

Date Code Title Description
ST Notification of lapse