EP3521133A1 - System for protecting workers working on a railway track - Google Patents

System for protecting workers working on a railway track Download PDF

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Publication number
EP3521133A1
EP3521133A1 EP19154115.0A EP19154115A EP3521133A1 EP 3521133 A1 EP3521133 A1 EP 3521133A1 EP 19154115 A EP19154115 A EP 19154115A EP 3521133 A1 EP3521133 A1 EP 3521133A1
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EP
European Patent Office
Prior art keywords
distance
signal
protection
less
alarm
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.)
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Application number
EP19154115.0A
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German (de)
French (fr)
Inventor
Emmanuel Flamanc
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.)
Alstom Transport Technologies SAS
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Alstom Transport Technologies SAS
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Publication date
Application filed by Alstom Transport Technologies SAS filed Critical Alstom Transport Technologies SAS
Publication of EP3521133A1 publication Critical patent/EP3521133A1/en
Withdrawn legal-status Critical Current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
    • B61L23/00—Control, warning, or like safety means along the route or between vehicles or vehicle trains
    • B61L23/06—Control, warning, or like safety means along the route or between vehicles or vehicle trains for warning men working on the route
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L15/00—Indicators provided on the vehicle or vehicle train for signalling purposes ; On-board control or communication systems
    • B61L15/0018—Communication with or on the vehicle or vehicle train
    • 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 vehicle trains or setting of track apparatus
    • B61L25/02—Indicating or recording positions or identities of vehicles or vehicle trains
    • B61L25/025—Absolute localisation, e.g. providing geodetic coordinates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L2205/00—Communication or navigation systems for railway traffic
    • B61L2205/04—Satellite based navigation systems, e.g. GPS
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L23/00—Control, warning, or like safety means along the route or between vehicles or vehicle trains
    • B61L23/04—Control, warning, or like safety means along the route or between vehicles or vehicle trains for monitoring the mechanical state of the route
    • B61L23/041—Obstacle detection

Definitions

  • the present invention relates to a system for protecting workers working on a railway track on which at least one railway vehicle runs.
  • Interventions on or near a railway are generally dangerous because of the passage of railway vehicles, often at high speed, on this railway.
  • the protection system according to the invention is fully automated, so that it ensures a stop of the railway vehicle upstream of workers present on the railway.
  • Workers 12A, 12B, 12C were represented on the figure 1 . These workers 12A, 12B, 12C are located near a railway line 16. More particularly, the worker 12A is at a distance D2 from the railway line 16, the worker 12B is on the railway line 16 and 12C worker in the immediate vicinity of this railway line 16.
  • Each worker 12A, 12B, 12C carries a first protective device 18 of its own.
  • the first protection devices 18 are similar, so that only one will now be described with reference to the figure 2 .
  • Each first protection device 18 comprises first geolocation means 20, for example satellite geolocation means, of the GPS (acronym for "Global Positioning System”) type.
  • Each first protection device 18 furthermore comprises first signal-emitting means 22 capable of transmitting a first signal comprising a location information of the first protection device 18.
  • the first transmission means 22 are of any conceivable type enabling a first signal to be transmitted. long distance signal transmission.
  • Each first protection device 18 is also associated with an identifier of its own.
  • the first signal also advantageously comprises this identifier.
  • the first protection device 18 also comprises first receiving means 24 adapted to receive a second signal which will be described later.
  • the first protection device 18 optionally includes a first alarm 26, for example an audible alarm and / or a vibrating alarm. This first alarm 26 is activated when the second signal is received, as will be described later.
  • a first alarm 26 for example an audible alarm and / or a vibrating alarm. This first alarm 26 is activated when the second signal is received, as will be described later.
  • the first device 18 is integrated in a working equipment of the corresponding worker, for example integrated in safety shoes or in a safety helmet.
  • this equipment is necessary for the worker to perform his task, he will not forget to take his first device 18 with him when he intervenes on the railway line 16.
  • At least one railway vehicle 28 travels on the railway line 16.
  • Each rail vehicle 28 comprises a second protection device 30.
  • Each second protection device 30 comprises second geolocation means 32, for example satellite geolocation means, of the GPS (Global Positioning System) type.
  • GPS Global Positioning System
  • These second geolocation means 32 are advantageously configured to measure a speed of movement of the railway vehicle 28.
  • the traveling speed of the railway vehicle 28 is measured by a conventional speed sensor.
  • Each second protection device 30 furthermore comprises second signal receiving means 34 adapted to receive said first signal emitted by each first device 18 within range.
  • Each second protection device 30 furthermore comprises second means 36 for transmitting a signal capable of transmitting a second signal destined for least one of the first devices 18.
  • the second transmission means 36 are of any conceivable type allowing a long-distance signal transmission.
  • the second protection device 30 advantageously comprises a second alarm 38, for example an audible alarm and / or a light alarm, arranged to alert a driver of the railway vehicle when it is activated.
  • a second alarm 38 for example an audible alarm and / or a light alarm, arranged to alert a driver of the railway vehicle when it is activated.
  • the railway vehicle 28 also comprises emergency braking means 40 of conventional type.
  • emergency braking means 40 are already equipped conventionally railway vehicles, and therefore will not be described in more detail.
  • the railway vehicle 28 furthermore comprises a control unit 42.
  • the control unit 42 is connected to the second device 30, to obtain the location information of the first devices 18, of the location of the second device 30, and preferably of the information of the second device 30. speed of the railway vehicle.
  • the control unit 42 also knows the layout of the railway line 16 on which the railway vehicle 28 is traveling, this trace being previously indicated in the control unit 42.
  • the control unit 42 is able to determine a first distance between each first protection device 18 and the railway line 16, using the location information of the first devices 18 and the known layout of the railway line 16.
  • the control unit 42 is configured to compare each first distance with a predefined safe distance.
  • This predefined safety distance is for example of the order of 30 meters or less than 30 meters, preferably of the order of 10 meters.
  • the worker 12A is at a first distance D2 greater than the safety distance, and the workers 12B and 12C are each at a first distance less than the safety distance.
  • the control unit 42 is also able to determine a second distance D between each first protection device 18 and the second protection device 30, using the location information of the first 18 and second 30 protection devices.
  • the control unit 42 determines this second distance D only for the protection devices 18 whose first distance is less than the safety distance.
  • the control unit 42 is configured to activate safety measures, and in particular activate the emergency braking means 40 when the first distance of at least one of the first devices 18 (called “first device concerned") is less than the safety distance, and that the second distance D of this first device concerned is less than a predefined braking distance D1.
  • This braking distance D1 is for example equal to, or as a higher variant, the distance that will travel the railway vehicle 28 to achieve a complete stop. In this case, the braking distance D1 is determined by the control unit 42, as a function of the speed of the railway vehicle 28.
  • the braking distance D1 is predefined, for example calculated in advance as a function of a maximum speed of the railway vehicle.
  • Another possible safety measure is to activate the second alarm 38, to warn the driver of the rail vehicle of the presence of workers on the railway line 16. It should be noted that this second alarm can alternatively be activated when the second distance is less than a predefined alarm distance, this alarm distance being greater than the braking distance. Thus, the driver is warned before the presence of workers on the track, and can take preventive measures such as reducing the speed of the railway vehicle or perform manual braking, before an emergency braking procedure is implemented. .
  • Another possible safety measure is to send said second signal to the first devices 18 concerned.
  • the second transmission means 36 know the identifiers of the first devices 18 concerned, since these identifiers are in the first signal received. Thus, they can send the second signal only to these first devices 18 concerned.
  • the first devices 18 concerned On receipt of the second signal, the first devices 18 concerned have their alarm 26 activated, so that the corresponding workers 12B, 12C are notified of the arrival of a railway vehicle and can take shelter.
  • this second signal may alternatively be sent when the second distance is less than a predefined warning distance, this warning distance being greater than the braking distance.
  • the warning distance is for example equal to said alarm distance.
  • the workers are notified of the arrival of the railway vehicle before the second distance is less than the braking distance, which allows the workers to deviate from the track until their first distance is greater than the distance. safety distance, so that emergency braking is not implemented when the second distance becomes less than the braking distance.
  • the protection system 10 comprises a verification unit 44, configured to determine the first distance between each first protection device and the railway track 16 and, when this first distance is less than the predefined safety distance for a first device 18, to check on a database if the identifier of this first device 18 is part of a list authorized identifiers. In the case where this identifier is not authorized, the corresponding first alarm 26 can be activated to signify to the corresponding worker that he is not authorized to remain near the railway line 16.
  • protection system 10 The operation of the protection system 10 will now be described. More particularly, there is described below a method of protecting workers working on a railway, by means of a protection system 10 as defined above.
  • the method comprises the geolocation of each first device 18. This geolocation can be performed continuously, or punctually at regular intervals, or on receiving an arrival signal transmitted by a rail vehicle 28 in approach.
  • the railway vehicle 28 transmits a continuous arrival signal, or alternatively at a regular interval.
  • the method then comprises transmitting, by the first transmission means 22 of each first device 18, the first signal containing the location information, as well as the identifier of the corresponding first device 18.
  • This first signal may be transmitted continuously, or occasionally at regular intervals, or on reception of an arrival signal transmitted by a railway vehicle 28 on approach.
  • Each first signal is received by the second reception means 34, which transmits the corresponding information to the control unit 42.
  • the method comprises determining the first distance, and comparing this first distance with the predefined safety distance.
  • the first devices 18 whose first distance is greater than the safety distance are ignored in the rest of the process, the workers 12A carrying these first devices 18 being sufficiently far away from the railway line 16 so that the risk of an accident with these workers is nonexistent. Thus, if all the first devices 18 are at a first distance greater than the safety distance, no security measure is activated.
  • first distance determination and comparison are performed continuously, so as to implement the rest of the process if the first distance becomes less than the safety distance.
  • the method remains effective in the case where a first device 18, initially located at a first distance greater than the safety distance, subsequently approaches the railway line 16 to a first distance less than the safety distance. .
  • the method also comprises the geolocation of the second device 30, preferably carried out continuously.
  • the method includes determining the second distance D, and comparing the second distance D with the braking distance D1, and optionally with the warning distance and / or the alarm distance.
  • the second transmission means 36 emit a second signal to the first devices 18 whose identifier corresponds to a first distance less than the safety distance, said first devices concerned.
  • the first alarm 26 of these first relevant devices 18 is then actuated, on receipt of the second signal.
  • workers 12B and 12C may move away from track 16 until the first distance is greater than the safety distance, in which case their corresponding first devices 18 may be ignored for the remainder of the process.
  • the second transmission means 36 cease transmitting the second signal to its destination, and its first alarm 26 ceases.
  • the second alarm 38 is activated, warning the driver of the presence of workers on the track.
  • the driver can then take action, such as reducing the speed of the railway vehicle or stopping it altogether.
  • the emergency braking means 40 are activated. Indeed, it means that at least one worker is always on or near the track 16, so it is necessary to brake the railway vehicle 28 to avoid accidents.
  • the braking distance D1 is calculated continuously, as a function of the speed of the railway vehicle. This is for example the distance required for the railway vehicle to achieve a complete stop. In a variant, the braking distance D1 is greater than this distance necessary in order to ensure a margin of safety. According to another variant, the braking distance D1 is preset, for example equal to, or greater than, the distance required for the rail vehicle to achieve a complete stop when the rail vehicle is at its maximum speed.
  • the alarm distance may be equal to the warning distance, in which case only one comparison is made to simultaneously send the second signal and activate the second alarm 38.
  • the alarm distance may be equal to the warning distance, and equal to the braking distance.
  • a single comparison is made to simultaneously send the second signal, activate the second alarm 38, and activate the emergency braking.

Abstract

Le système (10) comprend, pour chaque ouvrier (12A, 12B, 12C), un premier dispositif de protection (18) comprenant des premiers moyens de géolocalisation (20) et des premiers moyens (22) d'émission d'un premier signal comprenant une information de localisation de ce premier dispositif de protection (18), et pour chaque véhicule ferroviaire (28) : - un second dispositif de protection (30) comprenant des seconds moyens de géolocalisation (32) et des seconds moyens (34) de réception de chaque premier signal, et - une unité de contrôle (42) déterminant une première distance entre le premier dispositif de protection (18) et la voie ferrée (16) et une seconde distance (D) entre le premier dispositif de protection (18) et le second dispositif de protection (30), l'unité de contrôle (42) étant configurée pour activer des moyens de freinage d'urgence (40) lorsque la première distance est inférieure à une distance de sécurité et que la seconde distance (D) est inférieure à une distance de freinage (D1).The system (10) comprises, for each worker (12A, 12B, 12C), a first protection device (18) comprising first geolocation means (20) and first means (22) for transmitting a first signal comprising a location information of this first protection device (18), and for each railway vehicle (28): a second protection device (30) comprising second location-based means (32) and second means (34) of receiving each first signal, and - a control unit (42) determining a first distance between the first protection device (18) and the railway track (16) and a second distance (D) between the first protection device (18) ) and the second protection device (30), the control unit (42) being configured to activate emergency braking means (40) when the first distance is less than a safety distance and the second distance ( D) is less than a braking distance (D1).

Description

La présente invention concerne un système de protection d'ouvriers oeuvrant sur une voie ferrée sur laquelle circule au moins un véhicule ferroviaire.The present invention relates to a system for protecting workers working on a railway track on which at least one railway vehicle runs.

Les interventions sur une voie ferrée ou à proximité sont généralement dangereuses du fait du passage de véhicules ferroviaires, souvent à vitesse élevée, sur cette voie ferrée.Interventions on or near a railway are generally dangerous because of the passage of railway vehicles, often at high speed, on this railway.

Il est donc nécessaire de prévoir des moyens de sécurisation les plus fiables possibles, pour éviter tout accident entre un véhicule ferroviaire et un ouvrier.It is therefore necessary to provide the most reliable means of security possible, to avoid any accident between a railway vehicle and a worker.

A cet effet, l'invention a notamment pour objet un système de protection d'ouvriers oeuvrant sur une voie ferrée sur laquelle circule au moins un véhicule ferroviaire, caractérisé en ce qu'il comprend :

  • pour chaque ouvrier, un premier dispositif de protection porté par cet ouvrier, chaque premier dispositif de protection comprenant des premiers moyens de géolocalisation et des premiers moyens d'émission de signal propres à émettre un premier signal comprenant une information de localisation de ce premier dispositif de protection,
  • pour chaque véhicule ferroviaire :
    • un second dispositif de protection porté par ce véhicule ferroviaire, comprenant des seconds moyens de géolocalisation et des seconds moyens de réception de signal propres à recevoir chaque premier signal,
    • des moyens de freinage d'urgence, et
    • une unité de contrôle, propre à déterminer, pour chaque premier dispositif de protection de la part duquel les seconds moyens de réception reçoivent un premier signal, une première distance entre chaque premier dispositif de protection et la voie ferrée et une seconde distance entre chaque premier dispositif de protection et le second dispositif de protection, l'unité de contrôle étant configurée pour activer les moyens de freinage d'urgence lorsque la première distance d'au moins l'un des premiers dispositifs est inférieure à une distance de sécurité et que la seconde distance de ce même premier dispositif est inférieure à une distance de freinage,
en ce que chaque premier dispositif présente un identifiant qui lui est propre, le premier signal comprenant cet identifiant,
et en ce que le système comprend une unité de vérification, configurée pour déterminer la première distance entre chaque premier dispositif de protection et la voie ferrée, et, lorsque la première distance de l'un des premiers dispositifs est inférieure à la distance de sécurité, à vérifier sur une base de données si l'identifiant de ce premier dispositif fait partie d'une liste d'identifiants autorisés.For this purpose, the subject of the invention is in particular a system for protecting workers working on a railway track on which at least one railway vehicle circulates, characterized in that it comprises:
  • for each worker, a first protection device carried by this worker, each first protection device comprising first geolocation means and first signal transmission means adapted to emit a first signal comprising a location information of this first device; protection,
  • for each railway vehicle:
    • a second protection device carried by this rail vehicle, comprising second geolocation means and second signal receiving means capable of receiving each first signal,
    • emergency braking means, and
    • a control unit, suitable for determining, for each first protection device from which the second receiving means receives a first signal, a first distance between each first protection device and the railroad track and a second distance between each first device and the second protection device, the control unit being configured to activate the emergency braking means when the first distance of at least one of the first devices is less than a safety distance and the second distance from this same first device is less than a braking distance,
in that each first device has an identifier of its own, the first signal comprising this identifier,
and in that the system comprises a verification unit, configured to determine the first distance between each first protection device and the track rail, and, when the first distance of one of the first devices is less than the safety distance, to check on a database if the identifier of the first device is part of a list of authorized identifiers.

Le système de protection selon l'invention est entièrement automatisé, si bien qu'il assure un arrêt du véhicule ferroviaire en amont d'ouvriers présents sur la voie ferrée.The protection system according to the invention is fully automated, so that it ensures a stop of the railway vehicle upstream of workers present on the railway.

Un système de protection selon l'invention peut comporter en outre l'une ou plusieurs des caractéristiques suivantes, prises seules ou selon toutes les combinaisons techniquement envisageables.

  • Chaque premier dispositif comporte des premiers moyens de réception, et le second dispositif comporte des seconds moyens d'émission, et dans lequel : le second dispositif est configuré pour émettre un second signal vers au moins l'un des premiers dispositifs lorsque l'unité de contrôle constate que la première distance de ce premier dispositif est inférieure à la distance de sécurité et que la seconde distance de ce premier dispositif est inférieure à une distance d'avertissement prédéfinie, et le premier dispositif comporte une alarme, activée lorsque les premiers moyens de réception reçoivent le second signal.
  • Chaque premier dispositif est intégré dans un équipement de travail de l'ouvrier correspondant.
  • La distance de freinage est calculée en fonction de la vitesse du véhicule ferroviaire.
  • Le second dispositif comporte une seconde alarme, actionnée lorsque l'unité de contrôle constate que la première distance d'au moins l'un des premiers dispositifs est inférieure à la distance de sécurité et que la seconde distance de ce premier dispositif est inférieure à une distance d'alarme prédéfinie.
A protection system according to the invention may further comprise one or more of the following characteristics, taken alone or in any technically feasible combination.
  • Each first device comprises first reception means, and the second device comprises second transmission means, and wherein: the second device is configured to transmit a second signal to at least one of the first devices when the control finds that the first distance of this first device is less than the safety distance and the second distance of the first device is less than a predefined warning distance, and the first device comprises an alarm, activated when the first means of receive the second signal.
  • Each first device is integrated into a work equipment of the corresponding worker.
  • The braking distance is calculated according to the speed of the railway vehicle.
  • The second device comprises a second alarm, actuated when the control unit finds that the first distance of at least one of the first devices is less than the safety distance and the second distance of the first device is less than one. predefined alarm distance.

L'invention concerne également un procédé de protection d'ouvriers oeuvrant sur une voie ferrée, au moyen d'un système de protection tel que défini précédemment, comportant les étapes suivantes :

  • géolocalisation de chaque premier dispositif ;
  • transmission, par les premiers moyens d'émission de chaque premier dispositif, du premier signal contenant les informations de localisation de ce premier dispositif ;
  • réception de chaque premier signal par les seconds moyens de réception ;
  • géolocalisation du second dispositif,
  • pour chaque premier dispositif, détermination de la première distance, et comparaison de cette première distance avec la distance de sécurité ;
  • lorsque la première distance d'au moins l'un des premiers dispositifs est inférieure ou égale à la distance de sécurité, détermination de la seconde distance de chacun de cet au moins l'un des premiers dispositifs et comparaison de cette seconde distance avec la distance de freinage,
  • lorsque la seconde distance est inférieure ou égale à la distance de freinage, activation des moyens de freinage d'urgence.
The invention also relates to a method of protecting workers working on a railway, by means of a protection system as defined above, comprising the following steps:
  • geolocation of each first device;
  • transmitting, by the first transmission means of each first device, the first signal containing the location information of this first device;
  • receiving each first signal by the second receiving means;
  • geolocation of the second device,
  • for each first device, determining the first distance, and comparing this first distance with the safety distance;
  • when the first distance of at least one of the first devices is less than or equal to the safety distance, determining the second distance of each of this at least one of the first devices and comparing this second distance with the braking distance,
  • when the second distance is less than or equal to the braking distance, activation of the emergency braking means.

Un procédé de protection selon l'invention peut comporter en outre l'une ou plusieurs des caractéristiques suivantes, prises seules ou selon toutes les combinaisons techniquement envisageables.

  • Le procédé de protection comprend, préalablement à la comparaison de la seconde distance avec la distance de freinage, une estimation de la vitesse du véhicule ferroviaire et un calcul de la distance de freinage en fonction de la vitesse du véhicule ferroviaire.
  • Le procédé de protection comprend la comparaison de la seconde distance avec une distance d'avertissement, l'envoi d'un second signal à destination de l'au moins un des premiers dispositifs lorsque la seconde distance est inférieure à la distance d'avertissement, et activation d'une première alarme de ce premier dispositif à la réception du second signal.
  • Le procédé de protection comprend la comparaison de la seconde distance avec une distance d'alarme, et l'activation d'une seconde alarme du second dispositif lorsque la seconde distance est inférieure à la distance d'alarme.
A protection method according to the invention may further comprise one or more of the following characteristics, taken alone or in any technically feasible combination.
  • The protection method comprises, prior to comparison of the second distance with the braking distance, an estimate of the speed of the railway vehicle and a calculation of the braking distance as a function of the speed of the railway vehicle.
  • The protection method includes comparing the second distance with a warning distance, sending a second signal to the at least one of the first devices when the second distance is less than the warning distance, and activating a first alarm of this first device upon receipt of the second signal.
  • The protection method includes comparing the second distance with an alarm distance, and activating a second alarm of the second device when the second distance is less than the alarm distance.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple, et faite en se référant aux figures annexées, parmi lesquelles :

  • La figure 1 représente schématiquement un système de protection selon un exemple de mode de réalisation de l'invention ;
  • Les figures 2 et 3 représentent schématiquement, respectivement, un premier et un second dispositif de protection du système de protection de la figure 1.
The invention will be better understood on reading the description which follows, given solely by way of example, and with reference to the appended figures, among which:
  • The figure 1 schematically represents a protection system according to an exemplary embodiment of the invention;
  • The Figures 2 and 3 schematically represent, respectively, a first and a second protection device of the protection system of the figure 1 .

On a représenté sur la figure 1 un système de protection d'ouvriers, désigné par la référence générale 10.We have shown on the figure 1 a worker protection system, designated by general reference 10.

Des ouvriers 12A, 12B, 12C ont été représentés sur la figure 1. Ces ouvriers 12A, 12B, 12C se trouvent à proximité d'une voie ferrée 16. Plus particulièrement, l'ouvrier 12A se trouve à une distance D2 de la voie ferrée 16, l'ouvrier 12B se trouve sur la voie ferrée 16 et l'ouvrier 12C à proximité immédiate de cette voie ferrée 16.Workers 12A, 12B, 12C were represented on the figure 1 . These workers 12A, 12B, 12C are located near a railway line 16. More particularly, the worker 12A is at a distance D2 from the railway line 16, the worker 12B is on the railway line 16 and 12C worker in the immediate vicinity of this railway line 16.

Chaque ouvrier 12A, 12B, 12C porte un premier dispositif de protection 18 qui lui est propre.Each worker 12A, 12B, 12C carries a first protective device 18 of its own.

Les premiers dispositifs de protection 18 sont similaires, si bien qu'un seul va maintenant être décrit en référence à la figure 2.The first protection devices 18 are similar, so that only one will now be described with reference to the figure 2 .

Chaque premier dispositif de protection 18 comporte des premiers moyens de géolocalisation 20, par exemple des moyens de géolocalisation par satellite, de type GPS (acronyme anglais pour « Global Positioning System »).Each first protection device 18 comprises first geolocation means 20, for example satellite geolocation means, of the GPS (acronym for "Global Positioning System") type.

Chaque premier dispositif de protection 18 comporte par ailleurs des premiers moyens 22 d'émission de signal propres à émettre un premier signal comprenant une information de localisation du premier dispositif de protection 18. Les premiers moyens d'émission 22 sont de tout type envisageable permettant une transmission de signal à longue distance.Each first protection device 18 furthermore comprises first signal-emitting means 22 capable of transmitting a first signal comprising a location information of the first protection device 18. The first transmission means 22 are of any conceivable type enabling a first signal to be transmitted. long distance signal transmission.

Chaque premier dispositif de protection 18 est également associé à un identifiant qui lui est propre. Le premier signal comporte également avantageusement cet identifiant.Each first protection device 18 is also associated with an identifier of its own. The first signal also advantageously comprises this identifier.

Avantageusement, le premier dispositif de protection 18 comporte par ailleurs des premiers moyens de réception 24 propres à recevoir un second signal qui sera décrit ultérieurement.Advantageously, the first protection device 18 also comprises first receiving means 24 adapted to receive a second signal which will be described later.

Enfin, le premier dispositif de protection 18 comporte de manière optionnelle une première alarme 26, par exemple une alarme sonore et/ou une alarme vibrante. Cette première alarme 26 est activée en cas de réception du second signal, comme cela sera décrit ultérieurement.Finally, the first protection device 18 optionally includes a first alarm 26, for example an audible alarm and / or a vibrating alarm. This first alarm 26 is activated when the second signal is received, as will be described later.

Avantageusement, le premier dispositif 18 est intégré dans un équipement de travail de l'ouvrier correspondant, par exemple intégré dans des chaussures de sécurité ou dans un casque de sécurité. Ainsi, puisque cet équipement est nécessaire à l'ouvrier pour effectuer sa tâche, il ne risque pas d'oublier de prendre son premier dispositif 18 avec lui lorsqu'il intervient sur la voie ferrée 16.Advantageously, the first device 18 is integrated in a working equipment of the corresponding worker, for example integrated in safety shoes or in a safety helmet. Thus, since this equipment is necessary for the worker to perform his task, he will not forget to take his first device 18 with him when he intervenes on the railway line 16.

Au moins un véhicule ferroviaire 28 circule sur la voie ferrée 16.At least one railway vehicle 28 travels on the railway line 16.

Chaque véhicule ferroviaire 28 comporte un second dispositif de protection 30.Each rail vehicle 28 comprises a second protection device 30.

Chaque second dispositif de protection 30 comporte des seconds moyens de géolocalisation 32, par exemple des moyens de géolocalisation par satellite, de type GPS (acronyme anglais pour « Global Positioning System »).Each second protection device 30 comprises second geolocation means 32, for example satellite geolocation means, of the GPS (Global Positioning System) type.

Ces seconds moyens de géolocalisation 32 sont avantageusement configurés pour mesurer une vitesse de déplacement du véhicule ferroviaire 28.These second geolocation means 32 are advantageously configured to measure a speed of movement of the railway vehicle 28.

En variante, la vitesse de déplacement du véhicule ferroviaire 28 est mesurée par un capteur de vitesse classique.Alternatively, the traveling speed of the railway vehicle 28 is measured by a conventional speed sensor.

Chaque second dispositif de protection 30 comporte par ailleurs des seconds moyens de réception de signal 34 propres à recevoir ledit premier signal émis par chaque premier dispositif 18 à portée.Each second protection device 30 furthermore comprises second signal receiving means 34 adapted to receive said first signal emitted by each first device 18 within range.

Chaque second dispositif de protection 30 comporte par ailleurs des seconds moyens 36 d'émission de signal propres à émettre un second signal à destination d'au moins l'un des premiers dispositifs 18. Les seconds moyens d'émission 36 sont de tout type envisageable permettant une transmission de signal à longue distance.Each second protection device 30 furthermore comprises second means 36 for transmitting a signal capable of transmitting a second signal destined for least one of the first devices 18. The second transmission means 36 are of any conceivable type allowing a long-distance signal transmission.

Enfin, le second dispositif de protection 30 comporte avantageusement une seconde alarme 38, par exemple une alarme sonore et/ou une alarme lumineuse, agencée pour alerter un conducteur du véhicule ferroviaire lorsqu'elle est activée.Finally, the second protection device 30 advantageously comprises a second alarm 38, for example an audible alarm and / or a light alarm, arranged to alert a driver of the railway vehicle when it is activated.

Le véhicule ferroviaire 28 comporte par ailleurs des moyens de freinage d'urgence 40 de type classique. De tels moyens de freinage d'urgence 40 équipent déjà classiquement les véhicules ferroviaires, et ne seront donc pas décrits plus en détail.The railway vehicle 28 also comprises emergency braking means 40 of conventional type. Such emergency braking means 40 are already equipped conventionally railway vehicles, and therefore will not be described in more detail.

Le véhicule ferroviaire 28 comporte par ailleurs une unité de contrôle 42. L'unité de contrôle 42 est reliée au second dispositif 30, pour obtenir les informations de localisation des premiers dispositifs 18, de localisation du second dispositif 30, et de préférence des informations de vitesse du véhicule ferroviaire. L'unité de contrôle 42 connaît par ailleurs le tracé de la voie ferrée 16 sur laquelle circule le véhicule ferroviaire 28, ce tracé étant préalablement renseigné dans l'unité de contrôle 42.The railway vehicle 28 furthermore comprises a control unit 42. The control unit 42 is connected to the second device 30, to obtain the location information of the first devices 18, of the location of the second device 30, and preferably of the information of the second device 30. speed of the railway vehicle. The control unit 42 also knows the layout of the railway line 16 on which the railway vehicle 28 is traveling, this trace being previously indicated in the control unit 42.

L'unité de contrôle 42 est propre à déterminer une première distance entre chaque premier dispositif de protection 18 et la voie ferrée 16, à l'aide des informations de localisation des premiers dispositifs 18 et du tracé connu de la voie ferrée 16.The control unit 42 is able to determine a first distance between each first protection device 18 and the railway line 16, using the location information of the first devices 18 and the known layout of the railway line 16.

L'unité de contrôle 42 est configurée pour comparer chaque première distance avec une distance de sécurité prédéfinie. Cette distance de sécurité prédéfinie est par exemple de l'ordre de 30 mètres ou inférieure à 30 mètres, de préférence de l'ordre de 10 mètres.The control unit 42 is configured to compare each first distance with a predefined safe distance. This predefined safety distance is for example of the order of 30 meters or less than 30 meters, preferably of the order of 10 meters.

Dans l'exemple décrit, l'ouvrier 12A est à une première distance D2 supérieure à la distance de sécurité, et les ouvriers 12B et 12C sont chacun à une première distance inférieure à la distance de sécurité.In the example described, the worker 12A is at a first distance D2 greater than the safety distance, and the workers 12B and 12C are each at a first distance less than the safety distance.

L'unité de contrôle 42 est par ailleurs propre à déterminer une seconde distance D entre chaque premier dispositif de protection 18 et le second dispositif de protection 30, à l'aide des informations de localisation des premier 18 et second 30 dispositifs de protection. Avantageusement, l'unité de contrôle 42 ne détermine cette seconde distance D que pour les dispositifs de protection 18 dont la première distance est inférieure à la distance de sécurité.The control unit 42 is also able to determine a second distance D between each first protection device 18 and the second protection device 30, using the location information of the first 18 and second 30 protection devices. Advantageously, the control unit 42 determines this second distance D only for the protection devices 18 whose first distance is less than the safety distance.

L'unité de contrôle 42 est configurée pour activer des mesures de sécurité, et notamment activer les moyens de freinage d'urgence 40 lorsque la première distance d'au moins l'un des premiers dispositifs 18 (dit « premier dispositif concerné ») est inférieure à la distance de sécurité, et que la seconde distance D de ce premier dispositif concerné est inférieure à une distance de freinage D1 prédéfinie.The control unit 42 is configured to activate safety measures, and in particular activate the emergency braking means 40 when the first distance of at least one of the first devices 18 (called "first device concerned") is less than the safety distance, and that the second distance D of this first device concerned is less than a predefined braking distance D1.

Cette distance de freinage D1 est par exemple égale, ou en variante supérieure, à la distance que devra parcourir le véhicule ferroviaire 28 pour parvenir à un arrêt complet. Dans ce cas, la distance de freinage D1 est déterminée par l'unité de contrôle 42, en fonction de la vitesse du véhicule ferroviaire 28.This braking distance D1 is for example equal to, or as a higher variant, the distance that will travel the railway vehicle 28 to achieve a complete stop. In this case, the braking distance D1 is determined by the control unit 42, as a function of the speed of the railway vehicle 28.

En variante, la distance de freinage D1 est prédéfinie, par exemple calculée à l'avance en fonction d'une vitesse maximale du véhicule ferroviaire.As a variant, the braking distance D1 is predefined, for example calculated in advance as a function of a maximum speed of the railway vehicle.

Une autre mesure de sécurité envisageable consiste à activer la seconde alarme 38, afin d'avertir le conducteur du véhicule ferroviaire de la présence d'ouvriers sur la voie ferrée 16. Il est à noter que cette seconde alarme peut en variante être activée lorsque la seconde distance est inférieure à une distance d'alarme prédéfinie, cette distance d'alarme étant supérieure à la distance de freinage. Ainsi, le conducteur est averti préalablement de la présence d'ouvriers sur la voie, et peut prendre des mesures préventives comme réduire la vitesse du véhicule ferroviaire ou effectuer un freinage manuel, avant qu'une procédure de freinage d'urgence soit mise en oeuvre.Another possible safety measure is to activate the second alarm 38, to warn the driver of the rail vehicle of the presence of workers on the railway line 16. It should be noted that this second alarm can alternatively be activated when the second distance is less than a predefined alarm distance, this alarm distance being greater than the braking distance. Thus, the driver is warned before the presence of workers on the track, and can take preventive measures such as reducing the speed of the railway vehicle or perform manual braking, before an emergency braking procedure is implemented. .

Une autre mesure de sécurité envisageable consiste à envoyer ledit second signal à destination des premiers dispositifs 18 concernés. Les seconds moyens d'émission 36 connaissent les identifiants des premiers dispositifs 18 concernés, puisque ces identifiants se trouvent dans le premier signal reçu. Ainsi, ils peuvent n'envoyer le second signal qu'à ces premiers dispositifs 18 concernés.Another possible safety measure is to send said second signal to the first devices 18 concerned. The second transmission means 36 know the identifiers of the first devices 18 concerned, since these identifiers are in the first signal received. Thus, they can send the second signal only to these first devices 18 concerned.

A réception du second signal, les premiers dispositifs 18 concernés ont leur alarme 26 activée, si bien que les ouvriers 12B, 12C correspondants sont avertis de l'arrivée d'un véhicule ferroviaire et peuvent se mettre à l'abri.On receipt of the second signal, the first devices 18 concerned have their alarm 26 activated, so that the corresponding workers 12B, 12C are notified of the arrival of a railway vehicle and can take shelter.

Il est à noter que ce second signal peut en variante être envoyé lorsque la seconde distance est inférieure à une distance d'avertissement prédéfinie, cette distance d'avertissement étant supérieure à la distance de freinage. La distance d'avertissement est par exemple égale à ladite distance d'alarme.It should be noted that this second signal may alternatively be sent when the second distance is less than a predefined warning distance, this warning distance being greater than the braking distance. The warning distance is for example equal to said alarm distance.

Ainsi, les ouvriers sont avertis de l'arrivée du véhicule ferroviaire avant que la seconde distance soit inférieure à la distance de freinage, ce qui permet aux ouvriers de s'écarter de la voie jusqu'à ce que leur première distance soit supérieure à la distance de sécurité, de sorte que le freinage d'urgence n'est pas mis en oeuvre lorsque la seconde distance devient inférieure à la distance de freinage.Thus, the workers are notified of the arrival of the railway vehicle before the second distance is less than the braking distance, which allows the workers to deviate from the track until their first distance is greater than the distance. safety distance, so that emergency braking is not implemented when the second distance becomes less than the braking distance.

De manière optionnelle, le système de protection 10 comprend une unité de vérification 44, configurée pour déterminer la première distance entre chaque premier dispositif de protection et la voie ferrée 16 et, lorsque cette première distance est inférieure à la distance de sécurité prédéfinie pour un premier dispositif 18, à vérifier sur une base de données si l'identifiant de ce premier dispositif 18 fait partie d'une liste d'identifiants autorisés. Dans le cas où cet identifiant n'est pas autorisé, la première alarme 26 correspondante peut être activée pour signifier à l'ouvrier correspondant qu'il n'est pas autorisé à demeurer à proximité de la voie ferrée 16.Optionally, the protection system 10 comprises a verification unit 44, configured to determine the first distance between each first protection device and the railway track 16 and, when this first distance is less than the predefined safety distance for a first device 18, to check on a database if the identifier of this first device 18 is part of a list authorized identifiers. In the case where this identifier is not authorized, the corresponding first alarm 26 can be activated to signify to the corresponding worker that he is not authorized to remain near the railway line 16.

Le fonctionnement du système de protection 10 va maintenant être décrit. Plus particulièrement, on décrit ci-dessous un procédé de protection d'ouvriers oeuvrant sur une voie ferrée, au moyen d'un système de protection 10 tel que défini précédemment.The operation of the protection system 10 will now be described. More particularly, there is described below a method of protecting workers working on a railway, by means of a protection system 10 as defined above.

Le procédé comporte la géolocalisation de chaque premier dispositif 18. Cette géolocalisation peut être effectuée en continu, ou ponctuellement à intervalle régulier, ou à réception d'un signal d'arrivée transmis par un véhicule ferroviaire 28 en approche.The method comprises the geolocation of each first device 18. This geolocation can be performed continuously, or punctually at regular intervals, or on receiving an arrival signal transmitted by a rail vehicle 28 in approach.

Ainsi, dans cette dernière variante, le véhicule ferroviaire 28 émet un signal d'arrivée en continu, ou en variante à intervalle régulier.Thus, in this latter variant, the railway vehicle 28 transmits a continuous arrival signal, or alternatively at a regular interval.

Le procédé comporte ensuite la transmission, par les premiers moyens d'émission 22 de chaque premier dispositif 18, du premier signal contenant les informations de localisation, ainsi que l'identifiant du premier dispositif 18 correspondant. Ce premier signal peut être émis en continu, ou ponctuellement à intervalle régulier, ou à réception d'un signal d'arrivée transmis par un véhicule ferroviaire 28 en approche.The method then comprises transmitting, by the first transmission means 22 of each first device 18, the first signal containing the location information, as well as the identifier of the corresponding first device 18. This first signal may be transmitted continuously, or occasionally at regular intervals, or on reception of an arrival signal transmitted by a railway vehicle 28 on approach.

Chaque premier signal est reçu par les seconds moyens de réception 34, qui transmet les informations correspondantes à l'unité de contrôle 42.Each first signal is received by the second reception means 34, which transmits the corresponding information to the control unit 42.

Pour chaque premier dispositif, le procédé comporte la détermination de la première distance, et la comparaison de cette première distance avec la distance de sécurité prédéfinie.For each first device, the method comprises determining the first distance, and comparing this first distance with the predefined safety distance.

Les premiers dispositifs 18 dont la première distance est supérieure à la distance de sécurité sont ignorés dans la suite du procédé, les ouvriers 12A portant ces premiers dispositifs 18 étant suffisamment éloignés de la voie ferrée 16 pour que les risques d'accident avec ces ouvriers soient inexistants. Ainsi, si tous les premiers dispositifs 18 se trouvent à une première distance supérieure à la distance de sécurité, aucune mesure de sécurité n'est activée.The first devices 18 whose first distance is greater than the safety distance are ignored in the rest of the process, the workers 12A carrying these first devices 18 being sufficiently far away from the railway line 16 so that the risk of an accident with these workers is nonexistent. Thus, if all the first devices 18 are at a first distance greater than the safety distance, no security measure is activated.

Les étapes de détermination de première distance et de comparaison sont réalisées en continu, de manière à mettre en oeuvre la suite du procédé si la première distance devient inférieure à la distance de sécurité. Ainsi, le procédé reste efficace dans le cas où un premier dispositif 18, initialement localisé à une première distance supérieure à la distance de sécurité, se rapproche par la suite de la voie ferrée 16 jusqu'à une première distance inférieure à la distance de sécurité.The steps of first distance determination and comparison are performed continuously, so as to implement the rest of the process if the first distance becomes less than the safety distance. Thus, the method remains effective in the case where a first device 18, initially located at a first distance greater than the safety distance, subsequently approaches the railway line 16 to a first distance less than the safety distance. .

Le procédé comporte par ailleurs la géolocalisation du second dispositif 30, de préférence réalisée en continu.The method also comprises the geolocation of the second device 30, preferably carried out continuously.

Dès lors que l'une des premières distances est inférieure ou égale à la distance de sécurité prédéfinie, le procédé comporte la détermination de la seconde distance D, et la comparaison de la seconde distance D avec la distance de freinage D1, et de manière optionnelle avec la distance d'avertissement et/ou la distance d'alarme.As soon as one of the first distances is less than or equal to the predefined safety distance, the method includes determining the second distance D, and comparing the second distance D with the braking distance D1, and optionally with the warning distance and / or the alarm distance.

Lorsque la seconde distance D est inférieure à la distance d'avertissement, alors que la première distance reste inférieure à la distance de sécurité, les seconds moyens d'émission 36 émettent un second signal à destination des premiers dispositifs 18 dont l'identifiant correspond à une première distance inférieure à la distance de sécurité, dits premiers dispositifs concernés.When the second distance D is less than the warning distance, while the first distance remains below the safety distance, the second transmission means 36 emit a second signal to the first devices 18 whose identifier corresponds to a first distance less than the safety distance, said first devices concerned.

La première alarme 26 de ces premiers dispositifs concernés 18 est alors actionnée, à réception du second signal. Dans ce cas, les ouvriers 12B et 12C peuvent s'éloigner de la voie 16 jusqu'à ce que la première distance soit supérieure à la distance de sécurité, auquel cas leurs premiers dispositifs 18 correspondants peuvent être ignorés pour la suite du procédé. Lorsqu'un premier dispositif 18 devient localisé à une première distance supérieure à la distance de sécurité, les seconds moyens d'émission 36 cessent d'émettre le second signal à sa destination, et sa première alarme 26 cesse.The first alarm 26 of these first relevant devices 18 is then actuated, on receipt of the second signal. In this case, workers 12B and 12C may move away from track 16 until the first distance is greater than the safety distance, in which case their corresponding first devices 18 may be ignored for the remainder of the process. When a first device 18 becomes located at a first distance greater than the safety distance, the second transmission means 36 cease transmitting the second signal to its destination, and its first alarm 26 ceases.

Lorsque la seconde distance D est inférieure à la distance d'alarme, alors la seconde alarme 38 est actionnée, prévenant le conducteur de la présence d'ouvriers sur la voie. Le conducteur peut alors prendre des mesures, telles que réduire la vitesse du véhicule ferroviaire ou l'arrêter totalement.When the second distance D is less than the alarm distance, then the second alarm 38 is activated, warning the driver of the presence of workers on the track. The driver can then take action, such as reducing the speed of the railway vehicle or stopping it altogether.

Lorsque la seconde distance D est inférieure ou égale à la distance de freinage D1, et que la première distance est inférieure à la distance de sécurité, alors les moyens de freinage d'urgence 40 sont activés. En effet, cela signifie qu'au moins un ouvrier est toujours sur ou à proximité de la voie 16, si bien qu'il est nécessaire de freiner le véhicule ferroviaire 28 pour éviter tout accident.When the second distance D is less than or equal to the braking distance D1, and the first distance is less than the safety distance, then the emergency braking means 40 are activated. Indeed, it means that at least one worker is always on or near the track 16, so it is necessary to brake the railway vehicle 28 to avoid accidents.

Dans un mode de réalisation, la distance de freinage D1 est calculée en continu, en fonction de la vitesse du véhicule ferroviaire. Il s'agit par exemple de la distance nécessaire au véhicule ferroviaire pour parvenir à un arrêt complet. En variante, la distance de freinage D1 est supérieure à cette distance nécessaire afin d'assurer une marge de sécurité. Conformément à une autre variante, la distance de freinage D1 est prédéfinie, par exemple égale, ou supérieure, à la distance nécessaire au véhicule ferroviaire pour parvenir à un arrêt complet lorsque ce véhicule ferroviaire est à sa vitesse maximale.In one embodiment, the braking distance D1 is calculated continuously, as a function of the speed of the railway vehicle. This is for example the distance required for the railway vehicle to achieve a complete stop. In a variant, the braking distance D1 is greater than this distance necessary in order to ensure a margin of safety. According to another variant, the braking distance D1 is preset, for example equal to, or greater than, the distance required for the rail vehicle to achieve a complete stop when the rail vehicle is at its maximum speed.

On notera que la distance d'alarme peut être égale à la distance d'avertissement, auquel cas une seule comparaison est effectuée pour simultanément envoyer le second signal et activer la seconde alarme 38.Note that the alarm distance may be equal to the warning distance, in which case only one comparison is made to simultaneously send the second signal and activate the second alarm 38.

Conformément à une autre variante, la distance d'alarme peut être égale à la distance d'avertissement, et égale à la distance de freinage. Dans ce cas, une seule comparaison est effectuée pour simultanément envoyer le second signal, activer la seconde alarme 38, et activer le freinage d'urgence.According to another variant, the alarm distance may be equal to the warning distance, and equal to the braking distance. In this case, a single comparison is made to simultaneously send the second signal, activate the second alarm 38, and activate the emergency braking.

Lorsque tous les ouvriers se sont déplacés jusqu'à ce que leur première distance soit supérieure à la distance de sécurité, alors les mesures de sécurité sont levées, et le véhicule ferroviaire peut se remettre en route.When all the workers have moved until their first distance is greater than the safety distance, then the safety measures are lifted, and the railway vehicle can restart.

Il est à noter que l'invention n'est pas limitée au mode de réalisation précédemment décrit et aux variantes évoquées, d'autres variantes pouvant être envisagées.It should be noted that the invention is not limited to the embodiment described above and the variants mentioned, other variants may be envisaged.

Claims (9)

Système (10) de protection d'ouvriers (12A, 12B, 12C) oeuvrant sur une voie ferrée (16) sur laquelle circule au moins un véhicule ferroviaire (28), caractérisé en ce qu'il comprend : - pour chaque ouvrier (12A, 12B, 12C), un premier dispositif de protection (18) porté par cet ouvrier (12A, 12B, 12C), chaque premier dispositif de protection (18) comprenant des premiers moyens de géolocalisation (20) et des premiers moyens (22) d'émission de signal propres à émettre un premier signal comprenant une information de localisation de ce premier dispositif de protection (18), - pour chaque véhicule ferroviaire (28) : • un second dispositif de protection (30) porté par ce véhicule ferroviaire, comprenant des seconds moyens de géolocalisation (32) et des seconds moyens (34) de réception de signal propres à recevoir chaque premier signal, • des moyens de freinage d'urgence (40), et • une unité de contrôle (42), propre à déterminer, pour chaque premier dispositif de protection (18) de la part duquel les seconds moyens de réception reçoivent un premier signal, une première distance entre ledit premier dispositif de protection (18) et la voie ferrée (16) et une seconde distance (D) entre ledit premier dispositif de protection (18) et le second dispositif de protection (30), l'unité de contrôle (42) étant configurée pour activer les moyens de freinage d'urgence (40) lorsque la première distance d'au moins l'un des premiers dispositifs (18) est inférieure à une distance de sécurité et que la seconde distance (D) de ce même premier dispositif (18) est inférieure à une distance de freinage (D1), en ce que chaque premier dispositif (18) présente un identifiant qui lui est propre, le premier signal comprenant cet identifiant,
et en ce que le système de protection (10) comprend une unité de vérification (44), configurée pour déterminer la première distance entre chaque premier dispositif de protection (18) et la voie ferrée (16), et, lorsque la première distance de l'un des premiers dispositifs (18) est inférieure à la distance de sécurité, à vérifier sur une base de données si l'identifiant de ce premier dispositif (18) fait partie d'une liste d'identifiants autorisés.System (10) for protecting workers (12A, 12B, 12C) working on a railway track (16) on which at least one railway vehicle (28) circulates, characterized in that it comprises: for each worker (12A, 12B, 12C), a first protective device (18) carried by this worker (12A, 12B, 12C), each first protection device (18) comprising first geolocation means (20) and first signal-emitting means (22) for transmitting a first signal including location information of said first protection device (18), - for each railway vehicle (28): A second protection device (30) carried by this rail vehicle, comprising second geolocation means (32) and second signal receiving means (34) capable of receiving each first signal, Emergency braking means (40), and A control unit (42), suitable for determining, for each first protection device (18) from which the second reception means receives a first signal, a first distance between said first protection device (18) and the first track (16) and a second distance (D) between said first protection device (18) and the second protection device (30), the control unit (42) being configured to activate the emergency braking means (40) when the first distance of at least one of the first devices (18) is less than a safety distance and the second distance (D) of the same first device (18) is less than a braking distance (D1), in that each first device (18) has an identifier of its own, the first signal comprising this identifier,
and in that the protection system (10) comprises a verification unit (44), configured to determine the first distance between each first protection device (18) and the railway track (16), and, when the first distance of one of the first devices (18) is less than the safety distance, to be checked on a database if the identifier of this first device (18) is part of a list of authorized identifiers. Système de protection (10) selon la revendication 1, dans lequel chaque premier dispositif (18) comporte des premiers moyens de réception (24), et le second dispositif (30) comporte des seconds moyens d'émission (36), et dans lequel : - le second dispositif (30) est configuré pour émettre un second signal vers au moins l'un des premiers dispositifs (18) lorsque l'unité de contrôle (42) constate que la première distance de ce premier dispositif (18) est inférieure à la distance de sécurité et que la seconde distance de ce premier dispositif (18) est inférieure à une distance d'avertissement prédéfinie, - le premier dispositif (18) comporte une alarme propre à être activée lorsque les premiers moyens de réception (24) reçoivent le second signal. The protection system (10) of claim 1, wherein each first device (18) has first receiving means (24), and the second device (30) includes second transmitting means (36), and wherein : the second device (30) is configured to transmit a second signal to at least one of the first devices (18) when the control unit (42) finds that the first distance of the first device (18) is less than the safety distance and the second distance of this first device (18) is less than a predefined warning distance, the first device (18) comprises an alarm capable of being activated when the first reception means (24) receive the second signal. Système de protection (10) selon l'une quelconque des revendications précédentes, dans lequel chaque premier dispositif (18) est intégré dans un équipement de travail de l'ouvrier correspondant.A protection system (10) according to any one of the preceding claims, wherein each first device (18) is integrated into a work equipment of the corresponding worker. Système de protection (10) selon l'une quelconque des revendications précédentes, dans lequel la distance de freinage est calculée en fonction de la vitesse instantanée ou maximale du véhicule ferroviaire (28).A protection system (10) as claimed in any one of the preceding claims, wherein the braking distance is calculated as a function of the instantaneous or maximum speed of the railway vehicle (28). Système de protection (10) selon l'une quelconque des revendications précédentes, dans lequel le second dispositif (30) comporte une seconde alarme (38), propre à être actionnée lorsque l'unité de contrôle (42) constate que la première distance d'au moins l'un des premiers dispositifs (18) est inférieure à la distance de sécurité et que la seconde distance de ce premier dispositif (18) est inférieure à une distance d'alarme prédéfinie.A protection system (10) as claimed in any one of the preceding claims, wherein the second device (30) has a second alarm (38) operable when the control unit (42) determines that the first distance d at least one of the first devices (18) is less than the safety distance and the second distance of the first device (18) is less than a predefined warning distance. Procédé de protection d'ouvriers oeuvrant sur une voie ferrée, au moyen d'un système de protection (10) selon l'une quelconque des revendications précédentes, comportant les étapes suivantes : - géolocalisation de chaque premier dispositif (18) ; - transmission, par les premiers moyens d'émission (22) de chaque premier dispositif (18), du premier signal contenant les informations de localisation de ce premier dispositif (18) ; - réception de chaque premier signal par les seconds moyens de réception (34) ; - géolocalisation du second dispositif (30), - pour chaque premier dispositif (18), détermination de la première distance, et comparaison de cette première distance avec la distance de sécurité ; - lorsque la première distance d'au moins l'un des premiers dispositifs (18) est inférieure ou égale à la distance de sécurité, détermination de la seconde distance de chacun de cet au moins l'un des premiers dispositifs (18) et comparaison de cette seconde distance avec la distance de freinage, - lorsque la seconde distance est inférieure ou égale à la distance de freinage, activation des moyens de freinage d'urgence. A method of protecting railway workers by means of a protection system (10) as claimed in any one of the preceding claims, comprising the steps of: geolocation of each first device (18); transmitting, by the first transmission means (22) of each first device (18), the first signal containing the location information of this first device (18); - receiving each first signal by the second receiving means (34); geolocation of the second device (30), for each first device (18), determining the first distance, and comparing this first distance with the safety distance; - when the first distance of at least one of the first devices (18) is less than or equal to the safety distance, determining the second distance of each of the at least one of the first devices (18) and comparing of this second distance with the braking distance, when the second distance is less than or equal to the braking distance, activation of the emergency braking means. Procédé de protection selon la revendication 6, comprenant, préalablement à la comparaison de la seconde distance avec la distance de freinage, une estimation de la vitesse du véhicule ferroviaire (28) et un calcul de la distance de freinage en fonction de la vitesse du véhicule ferroviaire (28).A protection method according to claim 6, comprising, prior to the comparison of the second distance with the braking distance, an estimate of the speed of the railway vehicle (28) and a calculation of the braking distance as a function of the speed of the vehicle railway (28). Procédé de protection selon la revendication 6 ou 7, comprenant la comparaison de la seconde distance avec une distance d'avertissement, l'envoi d'un second signal à destination de l'au moins un des premiers dispositifs (18) lorsque la seconde distance est inférieure à la distance d'avertissement, et activation d'une première alarme (26) de ce premier dispositif (18) à la réception du second signal.A method of protection according to claim 6 or 7, comprising comparing the second distance with a warning distance, sending a second signal to the at least one of the first devices (18) when the second distance is less than the warning distance, and activation of a first alarm (26) of this first device (18) upon receipt of the second signal. Procédé de protection selon l'une quelconque des revendications 6 à 8, comprenant la comparaison de la seconde distance avec une distance d'alarme, et l'activation d'une seconde alarme (38) du second dispositif (30) lorsque la seconde distance est inférieure à la distance d'alarme.A method of protection according to any one of claims 6 to 8, comprising comparing the second distance with an alarm distance, and activating a second alarm (38) of the second device (30) when the second distance is less than the alarm distance.
EP19154115.0A 2018-02-01 2019-01-29 System for protecting workers working on a railway track Withdrawn EP3521133A1 (en)

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FR1850857A FR3077260B1 (en) 2018-02-01 2018-02-01 PROTECTION SYSTEM FOR WORKERS WORKING ON A RAILWAY

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CN110949453A (en) * 2019-12-09 2020-04-03 交控科技股份有限公司 Safety protection method and system applied to rail transit

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JP2006224737A (en) * 2005-02-15 2006-08-31 Japan Radio Co Ltd Working section protecting system for railroad, train-mounted device for the same, and portable device for worker
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