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GB948215A - An arrangement for detecting a vehicle on a roadway - Google Patents

An arrangement for detecting a vehicle on a roadway

Info

Publication number
GB948215A
GB948215A GB419462A GB419462A GB948215A GB 948215 A GB948215 A GB 948215A GB 419462 A GB419462 A GB 419462A GB 419462 A GB419462 A GB 419462A GB 948215 A GB948215 A GB 948215A
Authority
GB
United Kingdom
Prior art keywords
vehicle
coils
roadway
transformers
feb
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
GB419462A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB948215A publication Critical patent/GB948215A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

948,215. Detecting vehicles electrically. TELEFONAKTIEBOLAGET L. M. ERICSSON. Feb. 2, 1962 [Feb. 3, 1961], No. 4194/62. Heading G1N. A vehicle is detected by an arrangement including two coils D1, D2 each consisting of a few turns (e.g. five to fifteen) of insulated copper wire and arranged in a roadway, and two transformers T1,T2 arranged above ground some distance away, the transformers being fed with A.C. and arranged so that the e.m.f.'s induced in windings L1 and L2 normally neutralise one another, except when a vehicle passes over coils D1,D2. The wires of adjacent sides of coils D1, D2 are arranged close together.
GB419462A 1961-02-03 1962-02-02 An arrangement for detecting a vehicle on a roadway Expired GB948215A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE112161 1961-02-03

Publications (1)

Publication Number Publication Date
GB948215A true GB948215A (en) 1964-01-29

Family

ID=20257626

Family Applications (1)

Application Number Title Priority Date Filing Date
GB419462A Expired GB948215A (en) 1961-02-03 1962-02-02 An arrangement for detecting a vehicle on a roadway

Country Status (1)

Country Link
GB (1) GB948215A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1171773A1 (en) * 1999-03-22 2002-01-16 Inductive Signature Technologies, Inc. Permeability-modulated carrier referencing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1171773A1 (en) * 1999-03-22 2002-01-16 Inductive Signature Technologies, Inc. Permeability-modulated carrier referencing
EP1171773A4 (en) * 1999-03-22 2004-11-10 Inductive Signature Tech Inc Permeability-modulated carrier referencing

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