FR2469722B1 - - Google Patents

Info

Publication number
FR2469722B1
FR2469722B1 FR7927794A FR7927794A FR2469722B1 FR 2469722 B1 FR2469722 B1 FR 2469722B1 FR 7927794 A FR7927794 A FR 7927794A FR 7927794 A FR7927794 A FR 7927794A FR 2469722 B1 FR2469722 B1 FR 2469722B1
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
FR7927794A
Other languages
French (fr)
Other versions
FR2469722A1 (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.)
SAXBY
Original Assignee
SAXBY
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 SAXBY filed Critical SAXBY
Priority to FR7927794A priority Critical patent/FR2469722A1/fr
Publication of FR2469722A1 publication Critical patent/FR2469722A1/fr
Application granted granted Critical
Publication of FR2469722B1 publication Critical patent/FR2469722B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
    • B61L1/16—Devices for counting axles; Devices for counting vehicles
    • B61L1/163—Detection devices
    • B61L1/165—Electrical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
    • B61L1/02—Electric devices associated with track, e.g. rail contacts
    • B61L1/08—Electric devices associated with track, e.g. rail contacts magnetically actuated; electrostatically actuated
    • 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
    • G01V3/101—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 by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil
    • G01V3/102—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 by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil by measuring amplitude

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Automation & Control Theory (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
FR7927794A 1979-11-12 1979-11-12 Dispositif detecteur de masses metalliques comportant des moyens de securite Granted FR2469722A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7927794A FR2469722A1 (fr) 1979-11-12 1979-11-12 Dispositif detecteur de masses metalliques comportant des moyens de securite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7927794A FR2469722A1 (fr) 1979-11-12 1979-11-12 Dispositif detecteur de masses metalliques comportant des moyens de securite

Publications (2)

Publication Number Publication Date
FR2469722A1 FR2469722A1 (fr) 1981-05-22
FR2469722B1 true FR2469722B1 (enrdf_load_html_response) 1981-12-18

Family

ID=9231551

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7927794A Granted FR2469722A1 (fr) 1979-11-12 1979-11-12 Dispositif detecteur de masses metalliques comportant des moyens de securite

Country Status (1)

Country Link
FR (1) FR2469722A1 (enrdf_load_html_response)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2563368B1 (fr) * 1984-04-20 1987-06-19 Jeumont Schneider Procede de compensation thermique d'un circuit magnetique
GB8824957D0 (en) * 1988-10-25 1988-11-30 Pa Consulting Services Buried metal detector
DE4216820A1 (de) * 1992-05-21 1993-11-25 Deutsche Aerospace In einer Fahrbahn oder dergleichen angeordnete Induktionsschleife
CN102211588B (zh) * 2011-05-09 2013-05-22 中国矿业大学 一种启闭进出风门的矿用轨道车辆控制装置
RU2658751C1 (ru) * 2017-09-13 2018-06-22 Куми Вячеслав Владимирович Электрогенерирующее устройство
DE102018111448A1 (de) * 2018-05-14 2019-11-14 PINTSCH TIEFENBACH GmbH Sensor zum Erfassen von Metallteilen, sowie Verfahren zum Abschwächen eines magnetischen Feldes

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3538430A (en) * 1967-05-18 1970-11-03 Jury Ivanovich Bulgakov Device for detecting ore bodies by measuring unstable electromagnetic fields excited by magnetic field pulses
US3747012A (en) * 1972-09-21 1973-07-17 R Buck Contactless oscillator-type proximity sensor with adjustable hysteresis
USRE30012E (en) * 1975-03-17 1979-05-29 Computer Identics Corporation Magnetic object detection device

Also Published As

Publication number Publication date
FR2469722A1 (fr) 1981-05-22

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse