EP0068944B1 - Dispositif de localisation d'un train - Google Patents

Dispositif de localisation d'un train Download PDF

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Publication number
EP0068944B1
EP0068944B1 EP82401029A EP82401029A EP0068944B1 EP 0068944 B1 EP0068944 B1 EP 0068944B1 EP 82401029 A EP82401029 A EP 82401029A EP 82401029 A EP82401029 A EP 82401029A EP 0068944 B1 EP0068944 B1 EP 0068944B1
Authority
EP
European Patent Office
Prior art keywords
rails
loop
lines
train
transmitter
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
EP82401029A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0068944A1 (fr
Inventor
Jean Salmon
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.)
Jeumont Schneider SA
Original Assignee
Jeumont Schneider 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 Jeumont Schneider SA filed Critical Jeumont Schneider SA
Publication of EP0068944A1 publication Critical patent/EP0068944A1/fr
Application granted granted Critical
Publication of EP0068944B1 publication Critical patent/EP0068944B1/fr
Expired legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to a device for locating a train traveling on a railroad track.
  • Such a device finds its application in automatic train control systems for which the precise location of the train on the track is extremely important.
  • the use of an on-board odometer is insufficient as regards accuracy, due to the slipping of the wheels on the rails and the wear of the wheels.
  • beacons emitting radioelectric frequencies arranged along the track at determined distances, so as to ensure the readjustment of the meters periodically.
  • a solution has the drawback, on the one hand, of using radio frequencies which would be necessary for other uses and, on the other hand, of requiring the installation of costly beacons which must be ensured the power supply by means of cables arranged along the track.
  • Patent DE-A-1 405 711 also describes a device for locating a train which uses the detection of the passage of the train over a passive loop. However, this patent does not mention any particular arrangement of the loop with respect to the rails.
  • patent FR-A-1,560,903 describes a device for a railway signaling system, in which the signals are transmitted by induction from the rails to the vehicle, by means of coils mounted in the vehicle, above the rails.
  • the purpose of this device is to eliminate the disturbances resulting from the parasitic waves of the currents flowing along the rails. Windings being mounted in opposition, this device consists in orienting the windings with respect to the plane of the rails, at an angle such that these disturbances are eliminated or substantially reduced.
  • the present invention aims to improve the known devices by means of a device whose part on the ground is passive and requires no power, and whose on-board part implements a radio frequency which can, in addition, be used simultaneously for other uses such as the transmission of information between the rails and the train.
  • the device comprises, on board the train, at the front of the first axle of the latter and separately, at least one transmitter with fixed tuning on a radio frequency and a receiver tuned on the same frequency equipped with two sensors located respectively vertically of each of the two rows of rails, and on the ground, between the two rows of rails, a passive rectangular loop.
  • this loop which is tuned to the same frequency, thanks to a capacitor, has only one of its sides tangent to one of the rows of rails, so that the transmitter does not induce a signal in the corresponding sensor only via the loop, when the on-board part of the device passes over the ground loop, and the sensors are connected in differential mode, so as to eliminate the currents in phase opposition, emanating of currents flowing in each line of rail.
  • a rectangular loop 1 is disposed between the two rows of rails 2, 3, one of its sides being tangent to one of the latter.
  • the loop is tuned to the chosen frequency by means of a capacitor 4.
  • the train 5 has on board a transmitter 6 with fixed tuning on a radio frequency, and a receiver, not shown, tuned on the same frequency, provided with two lateral sensors 7, 8 respectively arranged substantially vertical to each row of rails 2, 3.
  • the device is then said to have central emission.
  • Sensors 7, 8 and central transmitter 6 are arranged in front of the first axle of the train.
  • a current is induced in the latter.
  • the loop current induced in turn in the lateral sensor 8 and the on-board receiver detects a signal which is, for example, used to readjust an odometer, or to increment a digital counter.
  • two lateral transmitters 61, 62 are used, arranged in the immediate vicinity of the sensors 7 and 8, instead of a central transmitter 6 placed at equal distance from the two rows of rails, but the operation is absolutely identical. .
  • Such an arrangement makes it possible to reduce the dimensions of the ground loop.
  • the width of the loop is approximately 1 meter, while with a device with two lateral emitters 61, 62 as shown in FIG. 2, the width of the loop can be reduced to around 40 cm. In both cases, the loop 1 can include one or more turns.
  • Such a device has the essential advantage of not requiring any power supply on the ground, nor of any electrical circuit on the ground to be protected. In addition, it can be used regardless of the type of track circuit fitted to the railway and, in particular, with a pulse track circuit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
EP82401029A 1981-06-10 1982-06-07 Dispositif de localisation d'un train Expired EP0068944B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8111371 1981-06-10
FR8111371A FR2507559A1 (fr) 1981-06-10 1981-06-10 Dispositif de localisation d'un train

Publications (2)

Publication Number Publication Date
EP0068944A1 EP0068944A1 (fr) 1983-01-05
EP0068944B1 true EP0068944B1 (fr) 1986-01-02

Family

ID=9259335

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401029A Expired EP0068944B1 (fr) 1981-06-10 1982-06-07 Dispositif de localisation d'un train

Country Status (8)

Country Link
US (1) US4508298A (enrdf_load_stackoverflow)
EP (1) EP0068944B1 (enrdf_load_stackoverflow)
AU (1) AU554102B2 (enrdf_load_stackoverflow)
BR (1) BR8202992A (enrdf_load_stackoverflow)
CA (1) CA1187581A (enrdf_load_stackoverflow)
DE (1) DE3268255D1 (enrdf_load_stackoverflow)
FR (1) FR2507559A1 (enrdf_load_stackoverflow)
ZA (1) ZA824081B (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2592621A1 (fr) * 1986-01-07 1987-07-10 Sncf Procede et systeme de localisation d'un mobile circulant sur un reseau ferroviaire
US4864306A (en) * 1986-06-23 1989-09-05 Wiita Floyd L Railway anticollision apparatus and method
DE4102812A1 (de) * 1991-01-31 1992-08-13 Ivv Ingenieurgesellschaft Fuer Einrichtung zum feinpositionieren eines schienengebundenen fahrzeuges an einem vorgegebenen haltepunkt
US5628478A (en) * 1995-01-31 1997-05-13 Harmon Industries, Inc. Cab signal pickup system with motor noise reduction
US5586736A (en) * 1995-06-16 1996-12-24 Harmon Industries, Inc. Cab signal sensor with noise suppression
AU717366B2 (en) * 1996-07-02 2000-03-23 Harmon Industries, Inc. Cab signal sensor with noise suppression

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1524429A (en) * 1922-05-03 1925-01-27 Gewecke Hermann Method and apparatus for transmitting signals to locomotives and the like
LU39881A1 (enrdf_load_stackoverflow) * 1960-03-15 1961-05-13
US3284614A (en) * 1962-09-14 1966-11-08 Gen Signal Corp Reversible counting system for locating moving objects
US3426349A (en) * 1967-04-04 1969-02-04 Gen Electric Vehicle locating system
US3555270A (en) * 1967-04-26 1971-01-12 Asea Ab Rail signal disturbance avoidance means
DE2324339C3 (de) * 1973-05-14 1975-10-09 Siemens Ag, 1000 Berlin Und 8000 Muenchen Anordnung eines passiven Antwortgerätes einer Ortungseinrichtung
US4041448A (en) * 1976-08-05 1977-08-09 Vapor Corporation Electronic railroad track marker system
FR2431411A1 (fr) * 1978-07-17 1980-02-15 Jeumont Schneider Dispositif de detection de position pour vehicule ferroviaire

Also Published As

Publication number Publication date
DE3268255D1 (en) 1986-02-13
ZA824081B (en) 1983-04-27
CA1187581A (fr) 1985-05-21
US4508298A (en) 1985-04-02
AU8431982A (en) 1982-12-16
EP0068944A1 (fr) 1983-01-05
AU554102B2 (en) 1986-08-07
BR8202992A (pt) 1983-05-03
FR2507559A1 (fr) 1982-12-17
FR2507559B1 (enrdf_load_stackoverflow) 1984-03-16

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