FR2632422B1 - Procede et dispositif pour detecter la proximite d'un objet ferromagnetique - Google Patents

Procede et dispositif pour detecter la proximite d'un objet ferromagnetique

Info

Publication number
FR2632422B1
FR2632422B1 FR8807339A FR8807339A FR2632422B1 FR 2632422 B1 FR2632422 B1 FR 2632422B1 FR 8807339 A FR8807339 A FR 8807339A FR 8807339 A FR8807339 A FR 8807339A FR 2632422 B1 FR2632422 B1 FR 2632422B1
Authority
FR
France
Prior art keywords
proximity
detecting
ferromagnetic object
ferromagnetic
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.)
Expired - Lifetime
Application number
FR8807339A
Other languages
English (en)
Other versions
FR2632422A1 (fr
Inventor
Jacques Colomb
Francois Schmitt
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.)
Sappel
Original Assignee
Sappel
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 Sappel filed Critical Sappel
Priority to FR8807339A priority Critical patent/FR2632422B1/fr
Publication of FR2632422A1 publication Critical patent/FR2632422A1/fr
Application granted granted Critical
Publication of FR2632422B1 publication Critical patent/FR2632422B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G01V3/10—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 using induction coils
    • G01V3/104—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 using induction coils using several coupled or uncoupled coils
    • G01V3/105—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 using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops
    • G01V3/107—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 using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops using compensating coil or loop arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Measuring Volume Flow (AREA)
FR8807339A 1988-06-02 1988-06-02 Procede et dispositif pour detecter la proximite d'un objet ferromagnetique Expired - Lifetime FR2632422B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8807339A FR2632422B1 (fr) 1988-06-02 1988-06-02 Procede et dispositif pour detecter la proximite d'un objet ferromagnetique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8807339A FR2632422B1 (fr) 1988-06-02 1988-06-02 Procede et dispositif pour detecter la proximite d'un objet ferromagnetique

Publications (2)

Publication Number Publication Date
FR2632422A1 FR2632422A1 (fr) 1989-12-08
FR2632422B1 true FR2632422B1 (fr) 1990-09-07

Family

ID=9366862

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8807339A Expired - Lifetime FR2632422B1 (fr) 1988-06-02 1988-06-02 Procede et dispositif pour detecter la proximite d'un objet ferromagnetique

Country Status (1)

Country Link
FR (1) FR2632422B1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2667952A1 (fr) * 1990-10-15 1992-04-17 Plymouth Francaise Sa Dispositif pour la detection, l'identification et le suivi de canalisations enterrees ou autres objets optiquement invisibles.
DE9300788U1 (fr) * 1993-01-21 1993-05-27 Ebinger, Klaus, 5000 Koeln, De

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002384A (en) * 1957-09-19 1961-10-03 Revere Corp America Flow meter
US3939416A (en) * 1974-07-15 1976-02-17 Westinghouse Brake & Signal Co., Ltd. Vehicle speed signal pulse source

Also Published As

Publication number Publication date
FR2632422A1 (fr) 1989-12-08

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Legal Events

Date Code Title Description
ST Notification of lapse

Effective date: 20060228