EP0068944A1 - Device for the localisation of a train - Google Patents

Device for the localisation of a train Download PDF

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Publication number
EP0068944A1
EP0068944A1 EP82401029A EP82401029A EP0068944A1 EP 0068944 A1 EP0068944 A1 EP 0068944A1 EP 82401029 A EP82401029 A EP 82401029A EP 82401029 A EP82401029 A EP 82401029A EP 0068944 A1 EP0068944 A1 EP 0068944A1
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EP
European Patent Office
Prior art keywords
rails
sensors
train
transmitter
rows
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
EP82401029A
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German (de)
French (fr)
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EP0068944B1 (en
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
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Jeumont Schneider SA
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Publication date
Application filed by Jeumont Schneider SA filed Critical Jeumont Schneider SA
Publication of EP0068944A1 publication Critical patent/EP0068944A1/en
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Publication of EP0068944B1 publication Critical patent/EP0068944B1/en
Expired legal-status Critical Current

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    • 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.
  • the object of the present invention is to obviate these drawbacks by means of a device whose part on the ground is passive and requires no power, and whose on-board part uses a radio frequency which can, moreover, 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 and in front of its first axle, a transmitter with fixed tuning on a radio frequency and a receiver tuned on the same frequency provided with two sensors arranged substantially vertically two rows of rails, and on the ground between the two rows of rails a passive rectangular loop including a tuning capacitor so as to be able to be tuned to the same frequency, one of the sides of which is tangent to the line of rails vertical to which said sensor is provided, so that the transmitter induces a signal in one of the sensors only through the loop, that is to say during the passage of the on-board part of the device above the loop on the ground.
  • FIG. 1 represents, seen from above and schematically, two rows of rails between which a passive loop is arranged in accordance with the invention and FIGS. 2 and 3 represent, in cross section and schematically, two embodiments of the device in accordance with the present invention.
  • 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 frequency chosen 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.
  • 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 about 40 cm. In both cases, the loop 1 may 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 track and, in particular, with a pulse track circuit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

L'invention a pour but un dispositif de localisation extrêmement précise d'un train circulant sur une voie ferrée et ne nécessitant aucun circuit complexe au sol. Selon l'invention, le dispositif comprend, à bord du train (5) et en avant du premier essieu de ce dernier, au moins un émetteur (6) à accord fixe sur une fréquence radio-électrique et un récepteur pourvu de deux capteurs (7, 8). Au sol, une boucle passive (1) accordée sur la fréquence utilisée, est disposée entre les deux files de rails (2, 3). Capteurs (7, 8) et émetteur 6 sont disposés de manière à ce qu'il n'y ait aucune induction directe entre eux. Application à la conduite automatique des trains.The object of the invention is a device for extremely precise location of a train running on a railway track and requiring no complex circuit on the ground. According to the invention, the device comprises, on board the train (5) and in front of the first axle of the latter, at least one transmitter (6) with fixed tuning on a radio frequency and a receiver provided with two sensors ( 7, 8). On the ground, a passive loop (1) tuned to the frequency used, is arranged between the two rows of rails (2, 3). Sensors (7, 8) and transmitter 6 are arranged so that there is no direct induction between them. Application to automatic train driving.

Description

La présente invention concerne un dispositif de localisation d'un train circulant sur une voie ferrée.The present invention relates to a device for locating a train traveling on a railroad track.

Un tel dispositif trouve son application dans les systèmes de conduite automatique de train pour lesquels la localisation précise du train sur la voie est extrêmement importante. Dans un tel cas, l'utilisation d'un compteur kilométrique embarqué est insuffisante quant à la précision, du fait des glissements des roues sur les rails et de l'usure des roues.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. In such a case, 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.

De ce fait, il est connu d'utiliser des balises émettant des fréquences radio-électriques disposées le long de la voie à des distances déterminées, de manière à assurer le recalage des compteurs périodiquement. Toutefois une telle solution présente l'inconvénient, d'une part, d'utiliser des fréquences radio-électriques qui seraient nécessaires à d'autres usages et, d'autre part, de nécessiter la mise en place de balises coûteuses dont il faut assurer l'alimentation électrique au moyen de câbles disposés le long de la voie.Therefore, it is known to use beacons emitting radioelectric frequencies arranged along the track at determined distances, so as to ensure the readjustment of the meters periodically. However, such 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.

La présente invention a pour but d'obvier à ces inconvénients au moyen d'un dispositif dont la partie au sol est passive et ne nécessite aucune alimentation, et dont la partie embarquée met en oeuvre une fréquence radio-électrique qui peut, en outre, être utilisée simultanément pour d'autres usages tels que la transmission d'informations entre les rails et le train.The object of the present invention is to obviate these drawbacks by means of a device whose part on the ground is passive and requires no power, and whose on-board part uses a radio frequency which can, moreover, be used simultaneously for other uses such as the transmission of information between the rails and the train.

Selon l'invention, le dispositif comprend, à bord du train et en avant de son premier essieu, un émetteur à accord fixe sur une fréquence radio-électrique et un récepteur accordé sur la même fréquence pourvu de deux capteurs disposés sensiblement à la verticale des deux files de rails, et, au sol entre les deux files de rails, une boucle rectangulaire passive incluant un condensateur d'accord de manière à pouvoir être accordée sur la même fréquence,dont l'un des côtés est tangent à la file de railsà la verticale de laquelle est prévu ledit capteur, de telle façon que l'émetteur n'induise un signal dans un des capteurs que par l'intermédiaire de la boucle, c'est-à-dire lors du passage de la partie embarquée du dispositif en dessus de la boucle au sol. L'invention sera mieux comprise et d'autres buts, avantages et caractéristiques de celle-ci apparaîtront plus clairement à la lecture de la description qui suit de modes de réalisation donnés à titre non limitatif et à laquelle une planche de dessins est annexée.According to the invention, the device comprises, on board the train and in front of its first axle, a transmitter with fixed tuning on a radio frequency and a receiver tuned on the same frequency provided with two sensors arranged substantially vertically two rows of rails, and on the ground between the two rows of rails a passive rectangular loop including a tuning capacitor so as to be able to be tuned to the same frequency, one of the sides of which is tangent to the line of rails vertical to which said sensor is provided, so that the transmitter induces a signal in one of the sensors only through the loop, that is to say during the passage of the on-board part of the device above the loop on the ground. The invention will be better understood and other objects, advantages and characteristics thereof will appear more clearly on reading the following description of embodiments given without limitation and to which a sheet of drawings is annexed.

La figure 1 représente, vue de dessus et schématiquement, deux files de rails entre lesquelles est disposée une boucle passive conformément à l'invention et les figures 2 et 3 représentent, en coupe transversale et schématiquement, deux modes de réalisation du dispositif conformes à la présente invention.FIG. 1 represents, seen from above and schematically, two rows of rails between which a passive loop is arranged in accordance with the invention and FIGS. 2 and 3 represent, in cross section and schematically, two embodiments of the device in accordance with the present invention.

En référence maintenant à la figure 1, une boucle rectangulaire 1 est disposée entre les deux files de rails 2, 3, l'un de ses côtés étant tangent à l'une de ces dernières, la boucle est accordée sur la fréquence choisie au moyen d'un condensateur 4.Referring now to Figure 1, 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 frequency chosen by means of a capacitor 4.

On a représenté deux modes de réalisation de l'invention en coupe transversale figures 2 et 3.Two embodiments of the invention are shown in cross section in Figures 2 and 3.

En référence à la figure 2, le train 5 a à bord un émetteur 6 à accord fixe sur une fréquence radio-électrique, et un récepteur, non représenté, accordé sur la même fréquence, pourvu de deux capteurs latéraux 7, 8 respectivement disposés sensiblement à la verticale de chaque file de rails 2, 3. Le dispositif est alors dit à émission centrale. Capteurs 7, 8 et émetteur central 6 sont disposés en avant du premier essieu du train.With reference to FIG. 2, 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.

Lorsque le train passe au droit de la boucle, ou, plus précisemment, lorsque l'émetteur embarqué 6 passe en dessus de la boucle 1, un courant est induit dans cette dernière. Le courant de boucle induit à son tour dans le.: capteur. 8 latéral et le récepteur embarqué détecte un signal qui est, par exemple, utilisé pour recaler un compteur kilométrique, ou pour incrémenter un compteur numérique.When the train passes to the right of the loop, or, more precisely, when the on-board transmitter 6 passes above loop 1, a current is induced in the latter. The loop current induced in turn in the: sensor. 8 side and the on-board receiver detects a signal which is, for example, used to readjust an odometer, or to increment a digital counter.

Les champs électriques ont été représentés sur la figure au moyen de flèches et l'on peut ainsi constater que, par une disposition judicieuse des capteurs 7, 8 par rapport à l'émetteur 6, il n'y a aucune induction directe notable entre ces derniers.The electric fields have been represented in the figure by means of arrows and it can thus be seen that, by a judicious arrangement of the sensors 7, 8 with respect to the transmitter 6, there is no significant direct induction between these last.

En connectant en outre les deux capteurs latéraux 7 et 8 selon un montage différentiel, on obtient une élimination des courants induits en opposition de phase, émanant des courants circulant dans chacune des files de rails. Dans le mode de réalisation représenté figure 2, on utilise deux émetteurs latéraux 61, 62 disposés au voisinage immédiat des capteurs 7 et 8 au lieu d'un émetteur central 6 disposé à égale distance des deux files de rails, mais le fonctionnement est absolument identique. Une telle disposition permet de réduire les dimensions de la boucle au sol.By further connecting the two lateral sensors 7 and 8 in a differential arrangement, an elimination of the currents induced in phase opposition is obtained, emanating from the currents flowing in each of the rows of rails. In the embodiment shown in FIG. 2, two lateral transmitters 61, 62 are used, placed 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 loop on the ground.

Avec un dispositif à émetteur central 6 tel que représenté figure 1, la largeur de la boucle est d'environ 1 mètre, tandis qu'avec un dispositif à deux émetteurs latéraux 61, 62 tel que représenté figure 2, la largeur de la boucle peut être réduite à environ 40 cm. Dans les deux cas, la boucle 1 peut comporter une ou plusieurs spires.With a central emitter device 6 as shown in FIG. 1, 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 about 40 cm. In both cases, the loop 1 may include one or more turns.

Un tel dispositif présente l'avantage essentiel de ne nécessiter aucune alimentation au sol, ni de circuit électrique au sol à protéger. En outre, il peut être utilisé quelque soit le type de circuit de voie équipant la voie ferrée et, en particulier, avec un circuit de voie à impulsions.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 track and, in particular, with a pulse track circuit.

Bien que seuls deux modes préférés de réalisation aient été décrits, il est évident que toute modification apportée par l'Homme de l'Art dans le même esprit ne sortirait pas du cadre de la présente invention.Although only two preferred embodiments have been described, it is obvious that any modification made by those skilled in the art in the same spirit would not depart from the scope of the present invention.

Claims (5)

1. Dispositif de localisation d'un train circulant sur une voie ferrée comportant deux files de rails, caractérisé en ce qu'il comprend, à bord dudit train et en avant du premier essieu de ce dernier, au moins un émetteur (6) à accord fixe sur une fréquence radio-électrique, et un récepteur accordé sur la même fréquence pourvu de deux capteurs_(7,8) disposés sensiblement à la verticale d'une file de rails (2, 3) et, au sol, une boucle rectangulaire passive (1) incluant un condensateur d'accord (4) accordé sur la même fréquence, dont l'un des côtés est tangent à la file de rails (3) à la verticale de laquelle est prévu un capteur (8), de telle manière que ledit émetteur (6) n'induise un signal dans ledit capteur (7, 8) que par l'intermédiaire de ladite boucle (1).1. Device for locating a train traveling on a railway track comprising two rows of rails, characterized in that it comprises, on board said train and in front of the first axle of the latter, at least one transmitter (6) to fixed tuning on a radio frequency, and a receiver tuned on the same frequency provided with two sensors_ (7,8) arranged substantially vertically in a line of rails (2, 3) and, on the ground, a rectangular loop passive (1) including a tuning capacitor (4) tuned to the same frequency, one of the sides of which is tangent to the file of rails (3) vertical of which a sensor (8) is provided, such so that said transmitter (6) induces a signal in said sensor (7, 8) only through said loop (1). 2. Dispositif selon la revendication 1 caractérisé en ce qu'il inclut, à bord dudit train, deux capteurs latéraux (7, 8) respectivement disposés à la verticale de chacune desdites files.de rails (2, 3)2. Device according to claim 1 characterized in that it includes, on board said train, two lateral sensors (7, 8) respectively arranged vertically of each of said rail lines (2, 3) 3. Dispositif selon la revendication 2 caractérisé en ce que lesdits capteurs (7, 8) sont connectés en mode différentiel de manière à éliminer les courants induits en opposition de phase émanant de chacune des files de rails (2, 3).3. Device according to claim 2 characterized in that said sensors (7, 8) are connected in differential mode so as to eliminate the currents induced in phase opposition emanating from each of the rows of rails (2, 3). 4. Dispositif selon l'une quelconque des revendications 1 à 3 caractérisé en ce que ledit émetteur (6) est disposé sensiblement à égale distance des deux files de rails (2, 3).4. Device according to any one of claims 1 to 3 characterized in that said transmitter (6) is disposed substantially at equal distance from the two rows of rails (2, 3). 5. Dispositif selon l'une quelconque des revendications 2 et 3 caractérisé en ce qu'il comprend deux émetteurs (61, 62) disposés au voisinage immédiat desdits capteurs (7, 8).5. Device according to any one of claims 2 and 3 characterized in that it comprises two transmitters (61, 62) arranged in the immediate vicinity of said sensors (7, 8).
EP82401029A 1981-06-10 1982-06-07 Device for the localisation of a train Expired EP0068944B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8111371A FR2507559A1 (en) 1981-06-10 1981-06-10 DEVICE FOR LOCATING A TRAIN
FR8111371 1981-06-10

Publications (2)

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

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ID=9259335

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EP82401029A Expired EP0068944B1 (en) 1981-06-10 1982-06-07 Device for the localisation of a train

Country Status (8)

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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2592621A1 (en) * 1986-01-07 1987-07-10 Sncf METHOD AND SYSTEM FOR LOCATING A MOBILE TRAVELING ON A RAIL NETWORK
US4864306A (en) * 1986-06-23 1989-09-05 Wiita Floyd L Railway anticollision apparatus and method
DE4102812A1 (en) * 1991-01-31 1992-08-13 Ivv Ingenieurgesellschaft Fuer Fine positioning equipment stopping railway vehicle at predetermined point - includes vehicle-borne receiver and transmitter linked by inductive loop of decreasing width on approach track
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

Citations (4)

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Publication number Priority date Publication date Assignee Title
US3284614A (en) * 1962-09-14 1966-11-08 Gen Signal Corp Reversible counting system for locating moving objects
DE1405711A1 (en) * 1960-03-15 1968-10-24 Alsacienne Constr Meca Method and device for signaling rail vehicles by means of beacons arranged on rails
FR1560903A (en) * 1967-04-26 1969-03-21
US4041448A (en) * 1976-08-05 1977-08-09 Vapor Corporation Electronic railroad track marker system

Family Cites Families (4)

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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
US3426349A (en) * 1967-04-04 1969-02-04 Gen Electric Vehicle locating system
DE2324339C3 (en) * 1973-05-14 1975-10-09 Siemens Ag, 1000 Berlin Und 8000 Muenchen Arrangement of a passive transponder of a locating device
FR2431411A1 (en) * 1978-07-17 1980-02-15 Jeumont Schneider POSITION DETECTION DEVICE FOR RAIL VEHICLE

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1405711A1 (en) * 1960-03-15 1968-10-24 Alsacienne Constr Meca Method and device for signaling rail vehicles by means of beacons arranged on rails
US3284614A (en) * 1962-09-14 1966-11-08 Gen Signal Corp Reversible counting system for locating moving objects
FR1560903A (en) * 1967-04-26 1969-03-21
US4041448A (en) * 1976-08-05 1977-08-09 Vapor Corporation Electronic railroad track marker system

Also Published As

Publication number Publication date
AU8431982A (en) 1982-12-16
DE3268255D1 (en) 1986-02-13
ZA824081B (en) 1983-04-27
US4508298A (en) 1985-04-02
EP0068944B1 (en) 1986-01-02
CA1187581A (en) 1985-05-21
FR2507559A1 (en) 1982-12-17
BR8202992A (en) 1983-05-03
FR2507559B1 (en) 1984-03-16
AU554102B2 (en) 1986-08-07

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