CH431604A - Dispositif pour détecter la variation de l'inductivité d'une self utilisation d'un tel dispositif - Google Patents

Dispositif pour détecter la variation de l'inductivité d'une self utilisation d'un tel dispositif

Info

Publication number
CH431604A
CH431604A CH357865A CH357865A CH431604A CH 431604 A CH431604 A CH 431604A CH 357865 A CH357865 A CH 357865A CH 357865 A CH357865 A CH 357865A CH 431604 A CH431604 A CH 431604A
Authority
CH
Switzerland
Prior art keywords
inductivity
choke
variation
detecting
Prior art date
Application number
CH357865A
Other languages
English (en)
Inventor
Prinz Francois
Original Assignee
Metravel S A
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 Metravel S A filed Critical Metravel S A
Priority to CH357865A priority Critical patent/CH431604A/fr
Priority to DE19661548163 priority patent/DE1548163A1/de
Publication of CH431604A publication Critical patent/CH431604A/fr

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
    • G01V3/101—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L13/00—Operation of signals from the vehicle or by the passage of the vehicle
    • B61L13/04—Operation of signals from the vehicle or by the passage of the vehicle using electrical or magnetic interaction between vehicle and track, e.g. by conductor circuits using special means or special conductors
    • B61L13/047—Operation of signals from the vehicle or by the passage of the vehicle using electrical or magnetic interaction between vehicle and track, e.g. by conductor circuits using special means or special conductors controlling inductively or magnetically
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches
    • H03K17/95—Proximity switches using a magnetic detector
    • H03K17/952—Proximity switches using a magnetic detector using inductive coils
    • H03K17/9537—Proximity switches using a magnetic detector using inductive coils in a resonant circuit
    • H03K17/9542—Proximity switches using a magnetic detector using inductive coils in a resonant circuit forming part of an oscillator
    • H03K17/9547—Proximity switches using a magnetic detector using inductive coils in a resonant circuit forming part of an oscillator with variable amplitude

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
CH357865A 1965-03-15 1965-03-15 Dispositif pour détecter la variation de l'inductivité d'une self utilisation d'un tel dispositif CH431604A (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH357865A CH431604A (fr) 1965-03-15 1965-03-15 Dispositif pour détecter la variation de l'inductivité d'une self utilisation d'un tel dispositif
DE19661548163 DE1548163A1 (de) 1965-03-15 1966-03-11 Schaltungsanordnung mit einem induktiven Naehrungsdetektor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH357865A CH431604A (fr) 1965-03-15 1965-03-15 Dispositif pour détecter la variation de l'inductivité d'une self utilisation d'un tel dispositif

Publications (1)

Publication Number Publication Date
CH431604A true CH431604A (fr) 1967-03-15

Family

ID=4259003

Family Applications (1)

Application Number Title Priority Date Filing Date
CH357865A CH431604A (fr) 1965-03-15 1965-03-15 Dispositif pour détecter la variation de l'inductivité d'une self utilisation d'un tel dispositif

Country Status (2)

Country Link
CH (1) CH431604A (fr)
DE (1) DE1548163A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7164349B2 (en) * 2003-11-07 2007-01-16 Nippon Soken, Inc. Approaching object detection apparatus

Also Published As

Publication number Publication date
DE1548163A1 (de) 1969-05-22

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