EP0282932A3 - Frequency-modulated track current circuit - Google Patents

Frequency-modulated track current circuit Download PDF

Info

Publication number
EP0282932A3
EP0282932A3 EP88103941A EP88103941A EP0282932A3 EP 0282932 A3 EP0282932 A3 EP 0282932A3 EP 88103941 A EP88103941 A EP 88103941A EP 88103941 A EP88103941 A EP 88103941A EP 0282932 A3 EP0282932 A3 EP 0282932A3
Authority
EP
European Patent Office
Prior art keywords
frequency
track circuit
receiver
current circuit
track
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
EP88103941A
Other languages
German (de)
Other versions
EP0282932A2 (en
EP0282932B1 (en
Inventor
Helmut Uebel
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.)
Alcatel Lucent Deutschland AG
Original Assignee
Standard Elektrik Lorenz AG
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 Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
Publication of EP0282932A2 publication Critical patent/EP0282932A2/en
Publication of EP0282932A3 publication Critical patent/EP0282932A3/en
Application granted granted Critical
Publication of EP0282932B1 publication Critical patent/EP0282932B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
    • B61L1/18—Railway track circuits
    • B61L1/181—Details
    • B61L1/188—Use of coded current

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Circuits Of Receivers In General (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Amplitude Modulation (AREA)
  • Transmitters (AREA)
  • Amplifiers (AREA)
  • Details Of Television Scanning (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

A circuit is described in which the bandwidth of the track circuit receiver (8) is design to be so narrow that it is virtually impossible for it to be subjected to interference. To permit interpretation of the frequency-modulated track voltage, the frequency deviation of which far exceeds the bandwidth of the receiver, the narrow band characteristic is achieved by means of an adjustable bandpass filter (7), the centre frequency of which is controlled so that it precisely follows the frequency of the track circuit transmitter (2). For this purpose, the output signal from the track circuit transmitter is fed to the track circuit receiver via a special lead (9). <IMAGE>
EP88103941A 1987-03-18 1988-03-12 Frequency-modulated track current circuit Expired - Lifetime EP0282932B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873708788 DE3708788A1 (en) 1987-03-18 1987-03-18 FREQUENCY MODULATED TRACK CIRCUIT
DE3708788 1987-03-18

Publications (3)

Publication Number Publication Date
EP0282932A2 EP0282932A2 (en) 1988-09-21
EP0282932A3 true EP0282932A3 (en) 1989-12-06
EP0282932B1 EP0282932B1 (en) 1996-07-10

Family

ID=6323367

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88103941A Expired - Lifetime EP0282932B1 (en) 1987-03-18 1988-03-12 Frequency-modulated track current circuit

Country Status (6)

Country Link
EP (1) EP0282932B1 (en)
AT (1) ATE140194T1 (en)
DE (2) DE3708788A1 (en)
ES (1) ES2091745T3 (en)
TR (1) TR24261A (en)
YU (1) YU53188A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19816581A1 (en) * 1998-04-08 1999-10-21 Siemens Ag Train control device
DE102007030598A1 (en) * 2007-06-28 2009-01-15 Siemens Ag Method and device for evaluating an INDUSI signal
DE102009010906A1 (en) * 2009-03-02 2010-09-16 Siemens Aktiengesellschaft Devices for detecting the occupancy or free state of a track section and method for operating such devices

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2140381A1 (en) * 1970-08-13 1972-02-17 Gen Signal Corp Receiver for a frequency modulated overlay track circuit
FR2121265A5 (en) * 1971-01-05 1972-08-18 Int Standard Electric Corp
US4417229A (en) * 1980-10-15 1983-11-22 Safetran Systems Corporation Means for use on a railroad to distinguish between traction current and signal current
DE3325249A1 (en) * 1983-07-13 1985-01-31 Standard Elektrik Lorenz Ag, 7000 Stuttgart Track circuit receiver
DE3403946A1 (en) * 1984-02-04 1985-08-08 Standard Elektrik Lorenz Ag, 7000 Stuttgart Presence-of-trains indicating device with track current coding

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2140381A1 (en) * 1970-08-13 1972-02-17 Gen Signal Corp Receiver for a frequency modulated overlay track circuit
FR2121265A5 (en) * 1971-01-05 1972-08-18 Int Standard Electric Corp
US4417229A (en) * 1980-10-15 1983-11-22 Safetran Systems Corporation Means for use on a railroad to distinguish between traction current and signal current
DE3325249A1 (en) * 1983-07-13 1985-01-31 Standard Elektrik Lorenz Ag, 7000 Stuttgart Track circuit receiver
DE3403946A1 (en) * 1984-02-04 1985-08-08 Standard Elektrik Lorenz Ag, 7000 Stuttgart Presence-of-trains indicating device with track current coding

Also Published As

Publication number Publication date
DE3708788A1 (en) 1988-09-29
ATE140194T1 (en) 1996-07-15
TR24261A (en) 1991-07-29
ES2091745T3 (en) 1996-11-16
YU53188A (en) 1990-12-31
DE3855407D1 (en) 1996-08-14
EP0282932A2 (en) 1988-09-21
EP0282932B1 (en) 1996-07-10

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