IS:trainDetectionElement

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Introduction

The tracks of the Swiss Federal Railways (link to the railML® website) are currently divided into new block sections to enable a tighter railway service. This requires the installation of additional signals and technical facilities. These counters register the incoming and outbound train axles of a section to recognize whether it is available or used. Staad, Switzerland, May 11, 2011[1].

Documentation

Syntax

Autoexport from the XML-Schema for element IS:trainDetectionElement of railML® version 3.3
    
Documentation track-side sensor elements.
Subschema infrastructure
Parents*

trainDetectionElements

Children

areaLocation (0..*), designator (0..*), elementState (0..*), gmlLocation (0..*), isValid (0..*), limitsTrainDetectionElement (0..2), linearLocation (0..*), name (0..*), networkLocation (0..*), spotLocation (0..*), typeDesignator (0..*)

Attributes:
  • basedOnTemplate: reference to a template train detection element/system (optional; xs:IDREF),

  • detectedObject: object (usually component of the railway vehicle) that is detected by the train detector (optional; xs:string)
Possible values:
  • axle: a system using counting points and a counter which detects the occupancy of a section of track by comparing the number of axles which enter the section with the number of axles which leave the section, parity of the numbers being necessary to give a clear indication.
  • endOfTrain
  • train: Train-borne positioning systems are a feature of modern Communication-Based Train Control systems (which often use moving block technology). These systems rely on the train regularly reporting its location and other information to the control centre, for which of course it requires a reliable communication link [Paul Darlington and David Fenner Train detection – the basics]
  • wheel: the track circuit confirms the absence of a train to the signalling system (track circuit clear). The presence of metal wheels and axles of a train within the track circuit boundaries will cause the rails to be ‘short circuited’ [Paul Darlington and David Fenner Train detection – the basics],

  • detectorMedium: medium (physical principle) that is used for detection by the train detection element (optional; xs:string)
Possible values:
  • hydraulic: installed below the rails and detect the slight bending of the rail caused by the presence of a large mass. This force is amplified by a liquid [ Theeg, Gregor, and Sergej Vlasenko. "Railway signalling & interlocking." International Compendium. Hamburg, Eurail-press Publ 448 (2009)]
  • inductive: uses inductive sensors to detect a train. It can be a kind of axle counter.
  • magnetic: uses a magnetic field to detect the passage of the rim and flange of a wheel.
  • mechanical: mechanical equivalent of a short track circuit. An example is a fouling bar that is fixed to the running rail in such a manner as to allow the wheel flanges of any vehicle passing over it to depress it to an amount equal to the depth of the wheel flange [Block signalling practice on a British railway].
  • optical: used when one detects train by cameras
  • pneumatic: same as "hydraulic" but the force is amplified by a gas.
  • radio: data-enabled radios (e.g. 4G/LTE) are used for the ground to train communications. This value should not be used because radio is used to transmit information rather than to detect a train.,

  • layout: constructional layout of the train detection element (optional; xs:string)
Possible values:
  • doubleLoop
  • doubleSensor
  • railCircuitStandAlone
  • singleLoop: one cable working as antenna (e.g. Euroloop)
  • singleSensor
  • tripleLoop,

  • type: type of train detector (optional; xs:string)
Possible values:
  • axleCounter: a system used in railway signalling to detect the clear or occupied status of a section of track between two points. The system generally consists of a wheel sensor (one for each end of the section) and an evaluation unit for counting the axles of the train both into and out of the section [wikipedia].
  • axleCountingCircuit: virtual track circuit
  • clearancePoint: The nominated point where rail traffic is deemed clear of others at converging points or other locations. This point may or may not be delineated by signs or clearance posts [Australian Rail Track Corporation Limited].
  • insulatedRailJoint: a small gap between two rail sections filled with an insulating material [Sandström et.al.].
  • trackCircuit: an electrical device used to prove the absence of a train on rail tracks to signallers and control relevant signals [wikipedia].
  • virtualClearancePoint: describes a clearance point, that is not linked with a physical element,
    e.g. the "police man" in Germany.,

  • id: the identifier of the object; this can be either of type xs:ID or UUID (obligatory; xs:ID); compare: Dev:Identities
*Notice:
Elements may have different parent elements. As a consequence they may be used in different contexts.
Please, consider this as well as a user of this Wiki as when developing this documentation further.
Aspects that are only relevant with respect to one of several parents should be explained exclusively in the documentation of the respective parent element.

 

Autoexport from the XML-Schema for element IS:trainDetectionElement of railML® version 3.2
    
Documentation track-side sensor elements.
Subschema infrastructure
Parents*

trainDetectionElements

Children

areaLocation (0..*), designator (0..*), external (0..*), gmlLocations (0..*), isValid (0..*), limitsTrainDetectionElement (0..2), linearLocation (0..*), name (0..*), networkLocation (0..*), spotLocation (0..*), typeDesignator (0..*)

Attributes:
  • basedOnTemplate: reference to a template train detection element/system (optional; xs:string; patterns: (urn:uuid:)?[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}|{[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}}),

  • detectedObject: object (usually component of the railway vehicle) that is detected by the train detector (optional; xs:string)
Possible values:
  • axle: a system using counting points and a counter which detects the occupancy of a section of track by comparing the number of axles which enter the section with the number of axles which leave the section, parity of the numbers being necessary to give a clear indication.
  • endOfTrain
  • train: Train-borne positioning systems are a feature of modern Communication-Based Train Control systems (which often use moving block technology). These systems rely on the train regularly reporting its location and other information to the control centre, for which of course it requires a reliable communication link [Paul Darlington and David Fenner Train detection – the basics]
  • wheel: the track circuit confirms the absence of a train to the signalling system (track circuit clear). The presence of metal wheels and axles of a train within the track circuit boundaries will cause the rails to be ‘short circuited’ [Paul Darlington and David Fenner Train detection – the basics],

  • detectorMedium: medium (physical principle) that is used for detection by the train detection element (optional; xs:string)
Possible values:
  • hydraulic: installed below the rails and detect the slight bending of the rail caused by the presence of a large mass. This force is amplified by a liquid [ Theeg, Gregor, and Sergej Vlasenko. "Railway signalling & interlocking." International Compendium. Hamburg, Eurail-press Publ 448 (2009)]
  • inductive: uses inductive sensors to detect a train. It can be a kind of axle counter.
  • magnetic: uses a magnetic field to detect the passage of the rim and flange of a wheel.
  • mechanical: mechanical equivalent of a short track circuit. An example is a fouling bar that is fixed to the running rail in such a manner as to allow the wheel flanges of any vehicle passing over it to depress it to an amount equal to the depth of the wheel flange [Block signalling practice on a British railway].
  • optical: used when one detects train by cameras
  • pneumatic: same as "hydraulic" but the force is amplified by a gas.
  • radio: data-enabled radios (e.g. 4G/LTE) are used for the ground to train communications. This value should not be used because radio is used to transmit information rather than to detect a train.,

  • layout: constructional layout of the train detection element (optional; xs:string)
Possible values:
  • doubleLoop
  • doubleSensor
  • railCircuitStandAlone
  • singleLoop: one cable working as antenna (e.g. Euroloop)
  • singleSensor
  • tripleLoop,

  • type: type of train detector (optional; xs:string)
Possible values:
  • axleCounter: a system used in railway signalling to detect the clear or occupied status of a section of track between two points. The system generally consists of a wheel sensor (one for each end of the section) and an evaluation unit for counting the axles of the train both into and out of the section [wikipedia].
  • axleCountingCircuit: virtual track circuit
  • clearancePoint: The nominated point where rail traffic is deemed clear of others at converging points or other locations. This point may or may not be delineated by signs or clearance posts [Australian Rail Track Corporation Limited].
  • insulatedRailJoint: a small gap between two rail sections filled with an insulating material [Sandström et.al.].
  • trackCircuit: an electrical device used to prove the absence of a train on rail tracks to signallers and control relevant signals [wikipedia].
  • virtualClearancePoint: describes a clearance point, that is not linked with a physical element,
    e.g. the "police man" in Germany.,

  • id: the identifier of the object; this can be either of type xs:ID or UUID (obligatory; xs:string; patterns: (urn:uuid:)?[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}|{[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}}); compare: Dev:Identities
*Notice:
Elements may have different parent elements. As a consequence they may be used in different contexts.
Please, consider this as well as a user of this Wiki as when developing this documentation further.
Aspects that are only relevant with respect to one of several parents should be explained exclusively in the documentation of the respective parent element.

 

Autoexport from the XML-Schema for element IS:trainDetectionElement of railML® version 3.1
    
Documentation This element is not documented in the schema!
Subschema infrastructure
Parents*

trainDetectionElements

Children

any (0..*), areaLocation (0..*), designator (0..*), external (0..*), gmlLocations (0..*), isValid (0..*), limitsTrainDetectionElement (0..2), linearLocation (0..*), name (0..*), networkLocation (0..*), spotLocation (0..*)

Attributes:
  • basedOnTemplate: reference to a template train detection element/system (optional; xs:IDREF; patterns: (urn:uuid:)?[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}|{[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}}),

  • type: type of train detector (obligatory; xs:string)
Possible values:
  • axleCounter
  • axleCountingCircuit
  • clearancePoint
  • insulatedRailJoint
  • trackCircuit
  • virtualClearancePoint,

  • detectedObject: object (usually component of the railway vehicle) that is detected by the train detector (optional; xs:string)
Possible values:
  • wheel
  • train
  • endOfTrain
  • axle,

  • detectorMedium: medium (physical principle) that is used for detection by the train detection element (optional; xs:string)
Possible values:
  • radio
  • pneumatic
  • optical
  • mechanical
  • magnetic
  • inductive
  • hydraulic,

  • layout: constructional layout of the train detection element (optional; xs:string)
Possible values:
  • tripleLoop
  • singleSensor
  • singleLoop
  • railCircuitStandAlone
  • doubleSensor
  • doubleLoop,

  • id: the identifier of the object; this can be either of type xs:ID or UUID (obligatory; xs:ID; patterns: (urn:uuid:)?[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}|{[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}}); compare: Dev:Identities
*Notice:
Elements may have different parent elements. As a consequence they may be used in different contexts.
Please, consider this as well as a user of this Wiki as when developing this documentation further.
Aspects that are only relevant with respect to one of several parents should be explained exclusively in the documentation of the respective parent element.

 


Changes 3.1→3.2

There exists an overview of all changes between railML® 3.1 and railML® 3.2 on page Dev:Changes/3.2.

The element documentation has been changed.

The parents have been changed.

The children have been changed.

The attributes have been changed.

Changes 3.2→3.3

There exists an overview of all changes between railML® 3.2 and railML® 3.3 on page Dev:Changes/3.3.

The parents have been changed.

The children have been changed.

The attributes have been changed.

Semantics

Best Practice / Examples

Additional Information

Notes

Type can be specified via its attribute @type (e.g. "axleCounter" or "insulatedRailJoint" or "trackCircuit"). If the train detection element/system is not included in the list of @type, the specific installation can be described using attributes @detectedObject, @detectorMedium and @layout. If you want to define these parameters only once, do this for a "basic" train detection element and make use of the attribute @basedOnTemplate referencing to this train detection element from other (specific) train detection elements.

Open Issues

References

  1. ↑ https://flickr.com/photos/kecko/

Additional Information

🗒️ This segment provides background information that is not relevant for the certification process.  


Note comes from #23.

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