DE1233959B - Vorrichtung zur Ermittlung der Gegenwart eines Fahrzeuges oder einer aehnlichen metallischen Masse - Google Patents

Vorrichtung zur Ermittlung der Gegenwart eines Fahrzeuges oder einer aehnlichen metallischen Masse

Info

Publication number
DE1233959B
DE1233959B DEG37067A DEG0037067A DE1233959B DE 1233959 B DE1233959 B DE 1233959B DE G37067 A DEG37067 A DE G37067A DE G0037067 A DEG0037067 A DE G0037067A DE 1233959 B DE1233959 B DE 1233959B
Authority
DE
Germany
Prior art keywords
frequency
oscillator
loop
filter
capacitor
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.)
Pending
Application number
DEG37067A
Other languages
German (de)
English (en)
Inventor
Martin John Prucha
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.)
General Precision Inc
Original Assignee
General Precision Inc
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 General Precision Inc filed Critical General Precision Inc
Publication of DE1233959B publication Critical patent/DE1233959B/de
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Traffic Control Systems (AREA)
  • Electronic Switches (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Amplifiers (AREA)
DEG37067A 1962-02-12 1963-02-12 Vorrichtung zur Ermittlung der Gegenwart eines Fahrzeuges oder einer aehnlichen metallischen Masse Pending DE1233959B (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US172620A US3364465A (en) 1962-02-12 1962-02-12 Method for tuning inductive loop vehicle detectors

Publications (1)

Publication Number Publication Date
DE1233959B true DE1233959B (de) 1967-02-09

Family

ID=22628470

Family Applications (1)

Application Number Title Priority Date Filing Date
DEG37067A Pending DE1233959B (de) 1962-02-12 1963-02-12 Vorrichtung zur Ermittlung der Gegenwart eines Fahrzeuges oder einer aehnlichen metallischen Masse

Country Status (4)

Country Link
US (1) US3364465A (enExample)
JP (1) JPS4023103B1 (enExample)
DE (1) DE1233959B (enExample)
GB (1) GB1039521A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1296284B (de) * 1964-07-06 1969-05-29 Gen Precision Inc Fahrzeugdetektoranordnung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7108793A (enExample) * 1970-07-06 1972-01-10
US4071832A (en) * 1976-06-14 1978-01-31 Sperry Rand Corporation Current controlled oscillator
NL184645C (nl) * 1979-08-09 1989-09-18 Philips Nv Werkwijze voor het bepalen van de snelheid van een voertuig.
US5680201A (en) * 1992-10-15 1997-10-21 Carrier Corporation Apparatus for including tank circuit with shielded, single turn coil, detecting passage of end of workpiece

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT81200B (de) * 1917-03-06 1920-08-25 Max Reithoffer Dr M Reithoffer Einrichtung zur Feststellung verborgener oder unzuEinrichtung zur Feststellung verborgener oder unzugänglicher Metalle. gänglicher Metalle.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2343987A (en) * 1940-04-19 1944-03-14 American District Telegraph Co Alarm system
FR979981A (fr) * 1942-11-23 1951-05-07 Perfectionnements aux transmissions radio-électriques
US2606285A (en) * 1942-11-23 1952-08-05 Fr Des Telecomm Soc Double heterodyne radio receiver
US2393717A (en) * 1944-06-16 1946-01-29 David M Speaker Electronic surgical metal body locator
US2442805A (en) * 1945-02-26 1948-06-08 Burdick Corp Metal locator
US2505754A (en) * 1945-08-02 1950-05-02 Edward E Combs Superheterodyne circuit
US2917732A (en) * 1957-03-22 1959-12-15 Librascope Inc Detector for indicating presence of objects
US3205352A (en) * 1961-08-04 1965-09-07 Gen Precision Inc Presence detector
US3103655A (en) * 1962-08-14 1963-09-10 Clarence S Jones Proximity responsive switching system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT81200B (de) * 1917-03-06 1920-08-25 Max Reithoffer Dr M Reithoffer Einrichtung zur Feststellung verborgener oder unzuEinrichtung zur Feststellung verborgener oder unzugänglicher Metalle. gänglicher Metalle.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1296284B (de) * 1964-07-06 1969-05-29 Gen Precision Inc Fahrzeugdetektoranordnung

Also Published As

Publication number Publication date
GB1039521A (en) 1966-08-17
US3364465A (en) 1968-01-16
JPS4023103B1 (enExample) 1965-10-12

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