FR2287676A1 - Magnetic proximity detector for metal parts - has oscillator with control input and resonant circuit emitting signal - Google Patents

Magnetic proximity detector for metal parts - has oscillator with control input and resonant circuit emitting signal

Info

Publication number
FR2287676A1
FR2287676A1 FR7434074A FR7434074A FR2287676A1 FR 2287676 A1 FR2287676 A1 FR 2287676A1 FR 7434074 A FR7434074 A FR 7434074A FR 7434074 A FR7434074 A FR 7434074A FR 2287676 A1 FR2287676 A1 FR 2287676A1
Authority
FR
France
Prior art keywords
signal
oscillator
resonant circuit
control input
metal parts
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.)
Granted
Application number
FR7434074A
Other languages
French (fr)
Other versions
FR2287676B3 (en
Inventor
Pierre Rothenburger
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.)
TDK Micronas GmbH
Original Assignee
Deutsche ITT Industries GmbH
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 Deutsche ITT Industries GmbH filed Critical Deutsche ITT Industries GmbH
Priority to FR7434074A priority Critical patent/FR2287676A1/en
Priority to DE19752544844 priority patent/DE2544844A1/en
Publication of FR2287676A1 publication Critical patent/FR2287676A1/en
Application granted granted Critical
Publication of FR2287676B3 publication Critical patent/FR2287676B3/fr
Granted 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
    • G01V3/101—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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/023—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring distance between sensor and object

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Electromagnetism (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Electronic Switches (AREA)

Abstract

A rectifier and screen holder (REF) receives the vibrating signal (VO) and supplies a d.c. signal (Vf). A switching and amplifier stage (DET) receives the d.c. signal at one input and a reference signal at another input and produces an output signal (Vd) with two levels. A feedback (RR) receives the output signal and applies a feedback signal (Vr) to the control output of the oscillator (OSC). These circuit parts are so arranged that, in the absence of a metal part at the resonant circuit (CO), the output signal assumes the first level and, in the presence of a metal part, assumes the second level.
FR7434074A 1974-10-10 1974-10-10 Magnetic proximity detector for metal parts - has oscillator with control input and resonant circuit emitting signal Granted FR2287676A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7434074A FR2287676A1 (en) 1974-10-10 1974-10-10 Magnetic proximity detector for metal parts - has oscillator with control input and resonant circuit emitting signal
DE19752544844 DE2544844A1 (en) 1974-10-10 1975-10-07 METAL DETECTOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7434074A FR2287676A1 (en) 1974-10-10 1974-10-10 Magnetic proximity detector for metal parts - has oscillator with control input and resonant circuit emitting signal

Publications (2)

Publication Number Publication Date
FR2287676A1 true FR2287676A1 (en) 1976-05-07
FR2287676B3 FR2287676B3 (en) 1977-07-22

Family

ID=9143925

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7434074A Granted FR2287676A1 (en) 1974-10-10 1974-10-10 Magnetic proximity detector for metal parts - has oscillator with control input and resonant circuit emitting signal

Country Status (2)

Country Link
DE (1) DE2544844A1 (en)
FR (1) FR2287676A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2473700A1 (en) * 1980-01-11 1981-07-17 Jaeger PROXIMITY SENSOR

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH696893A5 (en) * 2003-05-28 2008-01-15 Ampass Explorer Corp Search antenna polarization instrument for a material-detecting device.
EP2696219B1 (en) * 2012-08-06 2017-01-04 Ampass-Explorer Corp. Header device for improving the reception quality of a material detector device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2473700A1 (en) * 1980-01-11 1981-07-17 Jaeger PROXIMITY SENSOR

Also Published As

Publication number Publication date
FR2287676B3 (en) 1977-07-22
DE2544844A1 (en) 1976-04-22

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