GB868643A - Improvements in or relating to detection apparatus - Google Patents

Improvements in or relating to detection apparatus

Info

Publication number
GB868643A
GB868643A GB41858/59A GB4185859A GB868643A GB 868643 A GB868643 A GB 868643A GB 41858/59 A GB41858/59 A GB 41858/59A GB 4185859 A GB4185859 A GB 4185859A GB 868643 A GB868643 A GB 868643A
Authority
GB
United Kingdom
Prior art keywords
coil
transformer
detection apparatus
dec
indicator
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
Application number
GB41858/59A
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.)
Svenska AB Gasaccumulator
Original Assignee
Svenska AB Gasaccumulator
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 Svenska AB Gasaccumulator filed Critical Svenska AB Gasaccumulator
Publication of GB868643A publication Critical patent/GB868643A/en
Expired 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
    • 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
    • H03K17/9522—Proximity switches using a magnetic detector using inductive coils with a galvanically isolated probe
    • 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
    • H03K17/9525—Proximity switches using a magnetic detector using inductive coils controlled by an oscillatory signal

Landscapes

  • Physics & Mathematics (AREA)
  • General 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)
  • Geophysics (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

868,643. Detection apparatus. SVENSKA AKTIEBOLAGET GASACCUMULATOR. Dec. 9, 1959 [Dec. 17, 1958], No. 41858/59. Class 37. A detector coil 1 is connected in series with a current transformer 4 across an alternating supply 3, or compensating or comparison coil 5 being connected in series with a second transformer 6. The secondaries are connected to oppositely connected rectifiers 7 and 8, such that no voltage appears across the terminals 11 and 12 when equal currents flow through the coils 1 and 5. An indicator 13 is connected to terminals 11 and 12 via a filter 14 and condenser 15 such that only changes in the ratio of the currents flowing through transformers 4 and 6 reach the indicator which is thus effected only by vehicles moving in the vicinity of coil 1. The coil 1 may be a single turn coupled over transformer 2.
GB41858/59A 1958-12-17 1959-12-09 Improvements in or relating to detection apparatus Expired GB868643A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE868643X 1958-12-17

Publications (1)

Publication Number Publication Date
GB868643A true GB868643A (en) 1961-05-25

Family

ID=20367045

Family Applications (1)

Application Number Title Priority Date Filing Date
GB41858/59A Expired GB868643A (en) 1958-12-17 1959-12-09 Improvements in or relating to detection apparatus

Country Status (1)

Country Link
GB (1) GB868643A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210946A2 (en) * 1985-07-24 1987-02-04 MANNESMANN Aktiengesellschaft Roller table for a rolling mill of flat products

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210946A2 (en) * 1985-07-24 1987-02-04 MANNESMANN Aktiengesellschaft Roller table for a rolling mill of flat products
EP0210946A3 (en) * 1985-07-24 1988-05-25 Mannesmann Aktiengesellschaft Roller table for a rolling mill of flat products

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