EP3558787A2

EP3558787A2 - Display system for a vehicle-side assembly

Info

Publication number: EP3558787A2
Application number: EP18702140.7A
Authority: EP
Inventors: Malte Hammerl; Andreas STEINGRÖVER
Original assignee: Siemens Mobility GmbH
Current assignee: Siemens Mobility GmbH
Priority date: 2017-02-15
Filing date: 2018-01-17
Publication date: 2019-10-30
Also published as: AU2018220668B2; WO2018149582A3; DE102017202453A1; WO2018149582A2; AU2018220668A1

Abstract

The invention relates to a display system (3) for a vehicle-side assembly (1). In order to make the driving operation of a train easier for the power car driver, the invention proposes a vehicle-side assembly (1) comprising a vehicle-side automatic train protection system (2) and a vehicle-side display system (3), the automatic train protection system (2) having at least one automatic train protection control unit (4) and said unit (4) being designed such that it intervenes in the driving operation to alter the speed of a train comprising the vehicle-side assembly (1). The display system (3) is separate from the automatic train protection functions of the automatic train protection system (2) and said display system (3) comprises a display unit (6) which can display a signal descriptor. The display unit (6) is connected to a display control unit (7) and said display control unit (7) is designed such that the display of the signal descriptor on the display unit (6) is initiated in accordance with the position of the train. In addition, the invention proposes a display system (3) and a method for operating a train.

Description

description

Display system for a vehicle-mounted arrangement

The invention relates to a vehicle-side arrangement comprising a vehicle-side train protection system and a

on-vehicle display system.

A train protection system, also known as a train control system, is a technical system used on railways to control the travel of trains as a function of the permitted speed. A train protection system comprises technical installations which are located on the line, i. on or near the track, and technical equipment located on or in the vehicle, i. on or in the train. Therefore, the train protection system is divided into trackside technical systems and vehicle-side technical systems. The trackside facilities include in particular signals coupled to balises. The signals or balises give the

Driver the information not to retract in a section ahead or several sections ahead "stop" to retract "ride" or under

Attention to a maximum speed. The track-side technical systems of the train protection system communicate with the vehicle-mounted technical systems.

This information transfer from the trackside facilities to the vehicle technical systems of a train protection system is usually carried out nowadays without contact via magnetic or electromagnetic fields and corresponding transmitting and receiving components.

Essential for the train protection or the execution of

Zugsicherungstechnischen functions is that the

on-board technical facilities of the train operated by the transferred to trackside technical equipment

process train safety information. According to this information processing of Zugsichertechnischen

Information, gives the vehicle-side

Train control unit issued commands that are implemented in other on-board train control modules and as a result lead to the train is braked in time when not entering a forward section or when permitted entry into a train

Track section, braked so that a maximum permissible travel speed within this

Section is not exceeded. In the cases mentioned, therefore, an emergency stop by the

Train protection system triggered. That means that

Train safety system or the Zugsicherungstechnischen functions of a train control system directly into the driving operation

intervene.

For those equipped with a train protection system

Railway lines are frequently used stationary signals on the track side. These track-side stationary signals are

for example, shape signals or light signals. Each signal has a specific meaning. Under signal concept is the

Information that represents the signal, i. the signal term indicates the meaning of the signal.

Signal terms are e.g. Stop, ride, slow speed etc. These track-side signals are usually at a variety of specific points along the railway line. Of course, if the driver drives "on sight", he must know and observe the signal terms of the individual signals and thus set the speed accordingly

Adjust track sections. Exceeds the

However, the driver still adopts the maximum permissible speed within a section of the route, as above

described, the train protection system in the driving operation and triggers an emergency stop. If, as in the case described, the signals are at a plurality of specific points along the railway line, one speaks with such

Forced braking of point-shaped train protection or point-shaped train control.

However, from time to time, on railway lines that are "sighted", the trackside of the

Train drivers must be maintained or repaired optically perceptible signals and therefore no optical signal term for the driver is then recognizable when driving on such sections. Or it will be at new

railway lines partially or completely on to the driver visually recognizable signals or

Signal terms omitted. However, there are still information points on these railway lines at which signals are output that are received and processed by the vehicle-side train protection system by means of usually contactless, mostly magnetic or electromagnetic coupling, so that the described emergency braking can be triggered if necessary.

Thus, it is the task to ensure a flexible and reliable driving of the train.

This object is achieved by a vehicle-mounted arrangement according to the features of the subject-matter of patent claim 1.

The vehicle-side arrangement comprises a vehicle-side train protection system and a vehicle-side display system, wherein the train protection system at least one

Train control unit comprises, wherein the

Train control unit is designed such that it engages in the driving operation such that a

Speed change of a train, the vehicle side Arrangement, is separated, the display system is separated from the Zugsicherungstechnisches functions of the train control system, wherein the display system comprises a display unit that can indicate a signal term, wherein the

Display unit is connected to a display control unit, wherein the display control unit is designed such that the display of the signal term on the display unit in

Depending on a position of the train is caused.

This task is also accomplished by providing a

Display system with the features of claim 10 solved.

This object is also achieved by a method comprising an on-board train control system and with a

Display system is retrofitted according to the display system-related features of claim 1, wherein the

Display control unit causes the display of the signal term on the display unit in dependence on a position of the train.

These solutions to the object of the invention ensure a flexible and reliable driving operation of the train.

In addition, the driver of a equipped with a vehicle-mounted train protection system train, especially when "on sight" to be traveled, with a

trackside train protection system designed

Railroad lines which are not equipped in sections with signals which are visually recognizable to the driver, which facilitate or only make possible the operation of the train. The driver can drive the train due to visually recognizable signals or signal terms, which are now displayed on a display unit in the cab of the train. Such a display system can easily be retrofitted in the cab of a train. The existing vehicle side

Train protection system is replaced by retrofitting with the

Display system in terms of his zugsicherungstechnischen functions not impaired. Through this

Non-impairment of the train safety features of the on-board train control system can be waived regulatory approval in the retrofitting of the display system, since no adverse or no safety interventions by the retrofitted

Display system caused.

With regard to the time of displaying a signal term on the display unit in the cab, the following applies: The

Drivers should be a signal at such a position of the train displayed on the display unit on which the driver, when the railway line with trackside for the driver visually recognizable signals or signal terms was equipped, the signal concept of the trackside signal by sight could have seen first. In this way, the driver does not have to change his driving style, except that he now reads the signal terms from the display unit in the cab. In any case, the display of the signal on the display unit in the cab must be done in time so that the driver the necessary

Speed adjustments of the train with regard to a section of track ahead.

In the dependent claims further advantageous configured developments are listed.

In a first advantageous embodiment, the

Vehicle-side arrangement designed such that the Display control unit causes the display of the signal term when a track-side activation device passed by the train issues a corresponding activation command for displaying the signal term. This allows the

Activation to display the signal concept in the driver's cab using known low cost trackside components, e.g. passive activation devices (transponders) are triggered.

In a further advantageous embodiment, the

Vehicle-side arrangement designed such that the

Display control unit the display of the signal term

caused when a track-side activation device passed by the train outputs address information and a radio transmitter connected to the display control unit accesses the address information to the stored there

to interrogate signal term to be displayed. This allows a variety of signal terms in a single central

Memory deposited and queried.

In a further advantageous embodiment, the

Vehicle-side arrangement designed such that the

Display control unit the display of the signal term

causes when with the display control unit

connected Zugpositionserkennungsmodul outputs a position of the train and deposited this position of the train with a memory connected to the display control unit memory

Information is linked in such a way that the signal concept should be displayed. As a result, an impairment of the display of the signal term can be prevented on the display unit in the cab, if trackside

Activation devices are manipulated or destroyed. That is, it should be prevented from impairment by vandalism. In addition, trackside components, in this case activation devices, are also saved. In three further advantageous developments, the vehicle-side arrangement is designed such that the

Display control unit the display of the displayed

Signal Termination disabled when a corresponding

Deactivation command of the signal term is output. The solutions for issuing deactivation commands correspond to the above-described solutions for issuing activation commands and the associated advantages are corresponding.

Deactivating a display of a signal term on the display unit in the cab should be done at a time

executed and be recognizable to the driver, in which the position of the train of the position of the former

trackside signal corresponds, the driver would have happened quasi the former trackside signal. In this way, the driver does not have to change his driving style, except that he now the disabled signal terms from the display unit in

Driver's cab disappears.

In a further advantageous embodiment, the

Vehicle-side arrangement designed such that the

Display controller a concurrent nested

Display of several signal terms on the same

Display item element of the display unit performs. This allows the driver to recognize and focus on it

set which signal concept to the current one

Signal concept follows.

In a further advantageous embodiment, the

Vehicle-side arrangement configured such that the display of the top signal displayed on the display unit is deactivated and immediately after the second highest signal term is displayed on the display unit. Thereby the driver is informed early on the next signal signal.

In a further advantageous embodiment, the method for operating a train is configured such that the

Switching the display system is caused depending on the position of the train. As a result, the driver is automatically supplied with the signal terms to be observed on the display unit before the driver drives a section that is not with for the

Train drivers optically recognizable trackside

Or in which these signals are transmitted e.g. as a result of maintenance / repair are not functional.

The above-described characteristics, features and advantages of this invention, as well as the manner in which they are achieved, will become clearer and more clearly understood in the following description, taken in conjunction with the appended claims

Drawing explained using an exemplary embodiment.

The figure shows a schematic representation of a

vehicle-mounted arrangement and track-side devices.

The figure shows a vehicle-mounted arrangement 1, the one

Train protection system 2, a display system 3 and more

Includes components. These other components are one

Train position detection module 8, a radio receiver 9, a

Radio transmitter 10 and a memory 11.

The train protection system 2 comprises a

Train control unit 4 and an associated speed change module 5. Die

Train control unit 4 is also provided with a trackside train information output module 14 connected without contact for the purpose of transmitting information. The contactlessness should be illustrated by using double arrows.

The display system 3 includes a display control unit 7 and a display unit 6 connected thereto

Display control unit 7 is connected to the other components, train position recognition module 8, radio receiver 9, radio transmitter 10 and memory 11, respectively.

The radio receiver 9 is via a radio link with a trackside activation device 12, another trackside activation device 15 and a

trackside deactivation device 13 connected. The radio connection should be made by using double arrows

to be illustrated.

Passes or passes a train that includes the train protection system 2, a trackside

Train protection information output module 14 becomes a

train safety information from the

Train backup information output module 14 is output and received by the train control unit 4 and processed.

Typically, this information transfer takes place without contact from the track-side train assurance information output module 14 to the vehicle-side train control unit 4. However, this information can also be obtained by mechanical contact e.g. be transferred by means of contact brushes. As a result of

Processing of the train safety information within the train control unit 4, if necessary, issued a command for triggering a zugs icherungstechnischen function to the speed change module 5.

The speed change module 5 sets the

Speed change by accelerating or pulling the train slows. As a rule, an emergency braking with defined negative acceleration, defined braking time and defined braking distance is effected. This forced braking is so

automated, especially when the driver on a section of a maximum allowable

Speed exceeds or stops before a stretch of road. The train protection system monitors so

Driving behavior of the driver and engages

Misbehavior of the driver in the driving operation.

By contrast, the display system 3 as part of the vehicle-side arrangement 1 should neither be able to undertake train safety-related functions nor influence the train control or the execution of the train safety-related functions.

The display system 3 thus acts independently of the train control system 2. The display system 3 is thus of the

train safety features of the train control system 2 separated or decoupled. The display system 3 must not affect the function and effect of the train control system 2 in any way.

On the other hand, the train protection system 2 and the display system 3 can, of course, draw their operating power from the same power supply (vehicle electrical system) as long as the one described above

Impairment of the train safety functions is avoided.

The display system 3 thus has only for the

Train driver informative function, it can not intervene directly in the driving operation.

The separation of the train protection system 2 and the display system 3 with respect to the train safety functions is characterized illustrates that train protection system 2 and display system 3 in the figure reveal no connection.

The mode of operation of the display system 3 is as follows: If the display system 3 or the train comprising the vehicle-side arrangement 1 passes through a certain position, this causes

Display control unit 7, that the display unit 6 brings a signal term on the display unit 6 for display and thus for recognizability for the driver. The

Display control unit 7 thus causes this display on the display unit 6 as a function of a position of the train.

The position of the train can be determined by means of various devices or modules. For example, a lane-side activation device 12 signals an activation signal as a train passes or passes it.

This activation signal is received wirelessly by a radio receiver 9. This activation signal may contain information which signal term immediately on the

Display unit 6 is to be displayed. The

Display control unit 7 receives this activation signal including the signal conceptual information, performs corresponding signal and information processing, and outputs it to the display unit 6. The actual signal and information technology implementation in the

Display control unit 7 and / or the other with the

Display control unit 7 connected components is familiar to the expert and requires no detailed explanation.

The trackside activation device 12 may be configured as a passive activation balise. Passive means that the activation balise works like a transponder, so it does not have its own power supply. When driving over / passing the train induces a vehicle-side module a current in the passive Aktivierungsbalise, whereupon the activation Balise information about the displayed

Signal concept transmitted to the radio receiver 9. Other information can also be stored in the activation balise and transmitted to the radio receiver 9. This may be location information indicating the location of the activation balloon or location and / or time information correlating with the activation of the signal term on the display. This can also be an address information. These

Address information is then received by the radio receiver 9, passed to the display control unit 7 and there

processed so that the radio transmitter 10 is instructed to establish a radio link to the specified address and query the signal stored at this address signal. This interrogated signal term is then subsequently brought by the display control unit 7 for display on the display unit 6.

The track-side activation devices can be executed except as a balise as other trackside located on or next to the track readable information carrier.

The embodiment of the invention is also possible without a trackside activation device 12. That's how it determines

Train position detection module 8, for example, by means of GPS, Glonass or other satellite-based systems continuously the position of the train and transmits them

Train position information to the display control unit 7. Is such a determined position of the train with a in the

Memory 11 stored information linked and is associated with this link in the memory 11 and a signal to be displayed signal, the display control unit 7 will cause a display of this signal term on the display unit 6. The Zugpositionsermittlung can also by means of other methods based on triangulation, for example.

The deactivation of a signal term displayed on the display unit 6 is analogous to the activation of this

Signal concept.

Does the display system 3 or the vehicle-side

Arrangement 1 comprehensive train a certain position, causes the display control unit 7 that the display unit 6 a displayed signal term on the display unit 6 for the driver on the display unit recognizable

disabled. The display control unit 7 causes the deactivation of a displayed on the display unit 6

Signal concept so depending on a position of the train. The position of the train can also here by means

various devices or modules are determined.

For example, a trackside signal

Deactivation device 13, when a train passes over or passes it, a deactivation signal.

This deactivation signal is wirelessly from a

Radio receiver 9 received. This deactivation signal may contain information indicating which signal term is displayed

promptly disabled by the display unit 6.

The display control unit 7 receives this

Deactivation signal including the

Signal concept information, performs a corresponding signal and information processing and their output to the display unit 6 by. The actual implementation of signal and information technology in the display control unit 7 and / or the other components connected to the display control unit 7 is familiar to those skilled in the art and does not require any detailed explanation. The trackside deactivation device 13 may be configured as a passive deactivation beacon. Other information can also be stored in the deactivation balise and transmitted to the radio receiver 9. This can be a location information that indicates the location of the

Indicates deactivation balise, or location and / or

Be time information with the deactivation of the

correlated signal term on the display. This can also be an address information. These

is processed so that the radio transmitter 10 is instructed to establish a radio link to the specified address and the deposited at this address to be deactivated

Interrogate signal concept. This interrogated signal term is then subsequently brought by the display control unit 7 on the display unit 6 for deactivation.

The track-side deactivation devices can also be designed as other track-side on or next to the track located readable information carrier except as a balise.

The embodiment of the invention is also possible without a track-side deactivation device 13. That's how it determines

Memory 11 stored information linked and is with this link in the memory 11 also to

deactivating signal term linked, the

Display control unit 7, the deactivation of this Signal term on the display unit 6 cause. The

Train position determination can also be done here by means of other e.g. triangulation-based methods.

The signal processing between the display control unit 7 and the vehicle-side components connected to the display control unit 7 may also be otherwise divided. Thus, the signal processing / signal preprocessing or parts of the signal processing already in the with the

Display control unit 7 connected components instead of being executed in the display control unit 7 and vice versa. Radio receiver 9 and radio transmitter 10 may also be configured as a single component, ie as a radio transceiver.

The interaction of the display control unit 7 with the components connected to the display control unit 7 ensures a constant updating of signal terms on the display

Display unit 6 or a permanent deactivation of unneeded, i. no longer correlated with the current position of the train signal terms to be displayed.

The updating of signal terms on the display unit 6 takes place as follows, when a train first starts the

trackside activation device 12, then the further trackside activation device 15 and then the

Deactivation device 14 happens. That of the

trackside activation device 12 emitted

Activation signal is received wirelessly from the radio receiver 9 and then from the display control unit 7 and this

Activation signal including the signal term contained is output to the display unit 6 and on the

Display unit 6, this signal concept immediately

displayed. The displayed signal term is called "drive." When passing the track-side activation device 15 then this is the track-side activation device 15 emitted activation signal in turn wirelessly from the radio receiver 9 and then from the display control unit. 7

received and this "updated" activation signal

including the included "updated" signal term is output to the display unit 6 and on the

Display unit 6, this "updated" signal term is immediately displayed.

It is essential here that the updated signal concept, here "slow travel", is displayed on the display unit 6 without it being switched on

Deactivation signal was received from a deactivation device 13 and / or the display control unit 7 a

Deactivation signal has been output to the display unit 6. Represents the display of a signal term on the

Display unit 6 only a single display position element available, so then appears "slow speed" on this

Display position element of the display unit 6 and "drive" disappears from this display position element

Display unit 6. Are a plurality of display position elements on the display unit 6 for the display of various

Signal terms available both signal terms "ride" and "slow travel" can be displayed on the display unit 6. Of course, the driver must know which is the current relevant for this section signal concept, which he has to observe.

When passing the trackside deactivation device 13 then this is the trackside

Deactivation device 13 emitted deactivation signal in turn wirelessly from the radio receiver 9 and then from

Display control unit 7 received and displayed

Signal terms, here "ride" and / or "slow speed" are disabled for the driver on the display unit 6 recognizable. The signal terms "ride" and / or "slow motion" are therefore no longer displayed on the display unit 6. The display of the signal terms on the display unit 6 can also be effected by the shape and color of the displayed on the display unit 6 representations of a reduced copy of the shape and color of the existing real signals

correspond .

It is also possible to display several signal terms simultaneously on the display unit 6. In order not to cause confusion for the driver here, these multiple signal terms displayed simultaneously are displayed in nested form. That the currently valid signal term is at the top position in a display position element of

Display unit 6 is displayed. A later becoming valid

Signal concept is slightly offset and for the

Only a fraction of the driver can be identified with reference to the currently valid signal concept behind the currently valid signal concept on the same display position element

Display unit 6 is displayed. Several "staggered" signal terms can thus save space on the display unit 6

be displayed one after the other.

If the display control unit 7 outputs a deactivation signal for the highest signal term displayed in a display position element of the display unit 6, the uppermost signal term displayed is deactivated. Thereupon appears, for the

Train driver completely recognizable, immediately the now valid, previously offset to the second uppermost position signal concept completely on this display position element of the display unit 6. Other, later validating,

Signal terms are displayed on the same display position element simultaneously and offset, whereby these currently invalid signal terms are displayed only to a fraction or can be seen for the driver. The display system 3 can therefore be retrofitted at low cost for a train protection system 2 existing in one train, wherein it then forms the vehicle-side arrangement 1. A

Modification of the train protection system 2 is not required here.

If a track is equipped with signals on the track and permits the official approval of the driver to drive on this track "on sight" and the

On-board arrangement 1 is installed in the train, the driver has the ability to drive the route on sight by detecting the signals on the track. However, he can also drive this route by orienting himself exclusively to the signal terms displayed on the display unit 6. Here, therefore, the display system 3 to a redundant additional information for driving to

Available.

However, certain sections are no longer with

functioning, for the driver by sight

equipped with identifiable, trackside signals, the driver has to comply exclusively with the on the

Display unit 6 displayed signal terms with respect to the driving operation.

By the vehicle-mounted arrangement 1 so a shift of the driving operation "on sight" of trackside signals towards the display device 6 is possible.

If a track is not equipped with a train protection and thus the train control system 2 ineffective, the

Driver of course with official

Permit to perform the ride operation by yourself

exclusively oriented to the signal terms displayed on the display unit 6. The vehicle-side arrangement 1 can also not shown, accessible to the driver modules for switching on and / or off the train control system 2 and / or the display system 3 include.

The display system 3 and the vehicle-mounted arrangement 1 can be used in all rail-bound traffic systems, in particular railways, suburban trains, subways, trams, etc.

Upon further or complete dissemination of the display system 3 and the vehicle-mounted arrangement 1 in trains can be disarmed on sight lines to be traveled, which are still equipped with corresponding stationary trackside signals from these stationary trackside signals, e.g. to save maintenance and repair costs.

The invention is not limited to the particular embodiment but includes other modifications not explicitly disclosed by those skilled in the art as long as the gist of the invention is utilized. The explicitly revealed and the recognizable modifications are intended to protect the scope of the

Determine invention.

Reference sign list

1 - Vehicle-side arrangement

2 - train protection system

3 - Display system

4 - train control unit

5 - Speed change module

6 - Display unit

7 - Display control unit

8 - Train position detection module

9 - Radio receiver

10 - radio transmitter

11 - Memory

12 - Activation device

13 - Deactivation device

14 - Route-side instruction information output module

15 - Activation device

Claims

claims

1. Vehicle-side arrangement (1) comprising a vehicle-side train protection system (2) and a vehicle-side display system (3),

wherein the train protection system (2) at least one

Train control unit (4) comprises

wherein the train control unit (4) is designed such that it engages in the driving operation such that a speed change of a train comprising the vehicle-mounted arrangement (1) is effected,

the display system (3) being separate from the train control functions of the train control system (2),

wherein the display system (3) comprises a display unit (6) capable of displaying a signal term,

wherein the display unit (6) is connected to a display control unit (7),

wherein the display control unit (7) is adapted to cause the display of the signal term on the display unit (6) in response to a position of the train.

2. Vehicle-side arrangement (1) according to claim 1, d a d e r c h e c e n e c e s in that

the display control unit (7) is designed such that the display of the signal term is caused when a trackside activation device (12, 15) passed by the train has a corresponding activation command for displaying the signal

Signal Term outputs.

3. Vehicle-side arrangement (1) according to claim 1, d a d e r c h e c e n e c i n e t that

the display control unit (7) is designed such that the display of the signal term is initiated when a trackside activation device (12, 15) passed by the train issues address information and an address information item Display control unit (7) connected radio transmitter (10) accesses the address information to the deposited there

to interrogate signal term to be displayed.

4. Vehicle-side arrangement (1) according to claim 1, d a d e r c h e c e n e c i n e t that

the display control unit (7) is designed such that the display of the signal term is initiated when a display connected to the display control unit (7)

Zugpositionserkennungsmodul (8) outputs a position of the train and this position of the train with a in one with the

Display control unit (7) connected memory (11)

stored information is linked in such a way that the

Signal term to be displayed.

5. Vehicle-side arrangement (1) according to one of the preceding claims,

d a d u r c h e c e n c i n e s that

the display control unit (7) is designed such that the

Display of the displayed signal term is deactivated if a track side passed by the train

Deactivation device (13) a corresponding

Deactivation command of the signal term outputs.

6. Vehicle-side arrangement (1) according to one of the preceding claims 1 to 4,

d a d u r c h e c e n c i n e s that

the display control unit (7) is designed such that the display of the displayed signal term is deactivated when a track-side passed by the train

Deactivation device (13) outputs an address information and connected to the display control unit (7)

Radio transmitter (10) accesses the address information and there to the stored signal to be deactivated a

Deactivation information finds.

7. Vehicle-side arrangement (1) according to one of the preceding claims 1 to 4,

d a d u r c h e c e n c i n e s that

the display control unit (7) is designed such that the display of the displayed signal term is deactivated when a display connected to the display control unit (7)

Display control unit (7) connected memory (11)

stored information is linked such that a

Signal term should be disabled.

8. Vehicle-side arrangement (1) according to one of the preceding claims 1 to 7,

d a d u r c h e c e n c i n e s that

the display control unit (7) is designed such that a simultaneous nested display of a plurality of signal terms takes place on the same display position element of the display unit (6).

9. Vehicle-side arrangement (1) according to claim 8, d a d e r c h e c e n e c i n e t that

the display control unit (7) is adapted to deactivate the display of the uppermost signal term displayed on the display unit (6) and immediately thereafter to display the second highest signal term on the display unit (6).

10. Display system (3), according to the display system related

Features of claim 1, which is designed for use in a vehicle-side arrangement (1) comprising the features of patent claim 1.

11. A method for operating a train, the

vehicle-mounted train protection system (2) and with a Display system (3) is retrofitted according to the display system-related features of claim 1, wherein the

Display control unit (7) causes the display of the signal term on the display unit (6) in dependence on a position of the train.

12. A method for operating a train according to claim 11, characterized in that a

the switching on or off of the display system (3) in response to the position of the train is caused.