Direct Signalling For Trains.

Replies

• 

  Harshad Italiya

  Yes we can make one by setting up GPS device in each train.
• 

  Someoneyrs

  But this method is quite costlier and i want some economical method.
  Can laser work?
  Please suggest some more methods.
• 

  Someoneyrs

  By the way how can i go with GPS.
• 

  RajdeepCE

  May be you can do this by using shortrange wireless transmitter. It is the same concept being used in walkie-talkie.
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  payala

  That system you are talking about is already developed and in-use (at least in Spain). It is called ASFA. It works since the 70's and is based on electromagnetic transponders that are linked to the signals. In some cases the system can even force an automatic brake.
  
  However, it is finding some limitations with high-speed trains, and it will soon (railway-order soon.... 10-20 years) be gradually substituted by GSM-R.
• 

  sauravgoswami

  Well trains are already fitted with anti-braking systems,which are working perfectly fine,this concept can be further extention of anti-braking systems but what happens if it fails??? i would really like to know the limitations??
• 

  Harshad Italiya

  payala

  That system you are talking about is already developed and in-use (at least in Spain). It is called ASFA. It works since the 70's and is based on electromagnetic transponders that are linked to the signals. In some cases the system can even force an automatic brake.
  
  However, it is finding some limitations with high-speed trains, and it will soon (railway-order soon.... 10-20 years) be gradually substituted by GSM-R.

  Welcome to CE payala
  nice information there
  
• 

  payala

  sauravgoswami

  Well trains are already fitted with anti-braking systems,which are working perfectly fine,this concept can be further extention of anti-braking systems but what happens if it fails??? i would really like to know the limitations??

  That is one of the biggest difficulties in railway systems design, safety is critical. If a system failure implies loss of life, it has to be designed so that failure is almost impossible (and I say almost because impossible is nothing).
  
  In the railway, there are many systems that have these strict requirements. They are known as RAMS requirements (Reliability, Availability, Maintainability and Safety) and here Safety as in plane crashes not as in policemen. Depending on the implications of the failure of that system it is assigned a SIL(Safety Integrity Level) level, which goes from 1 to 4.
  
  Believe me, designing a SIL4 system is really difficult, and it is almost impossible that a dangerous failure could occur.
• 

  gohm

  Good point! Many systems now are going fully automated with a human interface, i.e. conductor, only as a backup and operator of the doors. Some short distance limited stop routes are even fully automated as ground transport between buildings, lots or airport terminals.
  
  

  payala

  That system you are talking about is already developed and in-use (at least in Spain). It is called ASFA. It works since the 70's and is based on electromagnetic transponders that are linked to the signals. In some cases the system can even force an automatic brake.
  
  However, it is finding some limitations with high-speed trains, and it will soon (railway-order soon.... 10-20 years) be gradually substituted by GSM-R.

• 

  sauravgoswami

  @payala : well i would have like to have provision of manual operation too,secondly,fully automated systems are more prone to be breached and when it comes to security chances cannot be taken,however,i am more insterested in technical limitations??? and how different it would be from anti-braking systems???
• 

  Saandeep Sreerambatla

  Pardon my ignorance i have a doubt 😀
  Guys i would like to know one thing .
  If security is concerned , if some one hacks the network and guides the train some where ??
  Manual intervention is required i think 😀. Just let us know the limitations .
  But regarding the project your idea and knowledge is excellent.
• 

  gohm

  Systems are put into place to prevent this from happening. All operations are controlled and overseen from a command center that has full monitoring and override capability. So far I have never heard of anyone being able to hack in and control trains, switch gear or signal systems.
  
  

  English-Scared

  Pardon my ignorance i have a doubt 😀
  Guys i would like to know one thing .
  If security is concerned , if some one hacks the network and guides the train some where ??
  Manual intervention is required i think 😀. Just let us know the limitations .
  But regarding the project your idea and knowledge is excellent.