ES446769A1 - Train position indicator - Google Patents

Train position indicator

Info

Publication number
ES446769A1
ES446769A1 ES446769A ES446769A ES446769A1 ES 446769 A1 ES446769 A1 ES 446769A1 ES 446769 A ES446769 A ES 446769A ES 446769 A ES446769 A ES 446769A ES 446769 A1 ES446769 A1 ES 446769A1
Authority
ES
Spain
Prior art keywords
radar
train position
signal
transponder
position 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
ES446769A
Other languages
Spanish (es)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES446769A1 publication Critical patent/ES446769A1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
    • G01S13/758—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal using a signal generator powered by the interrogation signal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
    • B61L25/02—Indicating or recording positions or identities of vehicles or trains
    • B61L25/026—Relative localisation, e.g. using odometer

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

An improved train position indication system of the type described, which includes inductive coupling means associated with the radar and with each of the transponders, means for powering the inductive coupling means associated with the radar and means in each of the transponders responsive to an inductively coupled radar signal for the transponder to respond to a radar interrogation signal, the transponder being inhibited for this response in the absence of an inductively coupled signal. (Machine-translation by Google Translate, not legally binding)
ES446769A 1975-04-08 1976-04-07 Train position indicator Expired ES446769A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1431975A GB1481494A (en) 1975-04-08 1975-04-08 Train position indicator

Publications (1)

Publication Number Publication Date
ES446769A1 true ES446769A1 (en) 1977-10-01

Family

ID=10039058

Family Applications (1)

Application Number Title Priority Date Filing Date
ES446769A Expired ES446769A1 (en) 1975-04-08 1976-04-07 Train position indicator

Country Status (6)

Country Link
CA (1) CA1089059A (en)
CH (1) CH598985A5 (en)
DE (1) DE2611868A1 (en)
ES (1) ES446769A1 (en)
GB (1) GB1481494A (en)
IT (1) IT1059598B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH660710A5 (en) * 1982-10-26 1987-06-15 Jd Technologie Ag DEVICE FOR CONTROL AND SIGNAL TRANSMISSION IN CONVEYORS.
US5129605A (en) * 1990-09-17 1992-07-14 Rockwell International Corporation Rail vehicle positioning system

Also Published As

Publication number Publication date
DE2611868A1 (en) 1976-10-21
CH598985A5 (en) 1978-05-12
GB1481494A (en) 1977-07-27
CA1089059A (en) 1980-11-04
IT1059598B (en) 1982-06-21

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970612