Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
  • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
  • B61L1/18—Railway track circuits
  • B61L1/181—Details
  • B61L1/187—Use of alternating current
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
  • B61L1/00—Devices along the route controlled by interaction with the vehicle or train
  • B61L1/18—Railway track circuits
  • B61L1/181—Details
  • B61L1/188—Use of coded current

Definitions

• the invention subjected to patenting relates to the earth electric system used to rail traffic control and in addition also for status of the rail line monitoring.
• the system can identify the presence of a railway rolling stocks on a specific rail track (cdb), and to verify the physical continuity / status of the rails.
• CBD system for rail track traffic control
• axle counters do not make it possible to verify the presence of the train at system power on, and are not able to" recover "any abnormal situations of count jump.
• axle counters has to be calibrated once installed along the rail
• the proposed system has the basic architecture and components similar to the basic architecture and components of insulated joints traditional cdb and AF Systems (where you can find for every cdb on rail signal generators, one or more current sensor loo receivers, elements used to separate cdb to cdb - insulated joint or filter).
• the proposed system is innovative against the present one because it is characterize by the presence of three innovative elements that combined together allow the system to overcome the relevant problem that today are in place, those elements are:
• the spectrum of noise is characterized by:
• the blocks fO, f1, ... fn are sinusoidal generators whose frequencies are chosen so to ensure that at least one of them does not correspond to the peaks of the noise signals generated by traction engine,
• the C block is the code generator
• the + is an Adder of various different frequency components
• the block P is the power amplifier coupled to rail in central area between thw two short sets (C1 and C2). In this example amplifier is connected with the rail
• •sO and s3 are the receivers (sensors) that read the current close to short- circuiting that delimitate cdb,
• the blocks P0, P1 , P2, ... PN Band pass Filters are used to separate the various frequencies imposed by the transmitter,
• D blocks are the demodulators that extract the code that modulated the different sinusoids (the possible use in demodulators and filters of signal extraction techniques such as cross correlation and look in amplifier, etc. allows
• the door OR serves to generate the "free cdb" signal also when the correct 150 code is recognized in relation to one carrier only,
• Sx is the link to one of the current sensors (So and S3)
• RX receiver - sensors
• the coincidence of the modulating code can be used to validate the information transmitted securely (redundant code).
• FIG. 2 As a second example of implementation is shown in Fig. 2 and described below:
• 165 ⁇ G is a broadband generator, eventually purged of those frequencies certainly noisy
• the block P is the power amplifier coupled to rail in central area between thw 170 two short sets (C1 and C2).
• amplifier is connected with the rail through a transformer
• •sO and s3 are the receivers (sensors) that read the current close to short- circuiting that delimitate cdb,
• •s1 and s2 are receivers (sensors) inside short-circuits connection useful to verify 175 the integrity of the Rails,
• the F is a filter to remove the components too covered by noise and already deleted in transmission bearing
• the module D is a demodulator for broad-band signals eventually containing cross correlation-based systems or look in amplifier, to increase the possibility of
• Sx is the link to one of the current sensors (So and S3)
• the transmission of codes are not connected to more 185 sinusoidal carrier modulation but to a broadband carrier using techniques similar to those used in the latest generation of mobile phones.
• the receivers S1 and S3 will receive both the signals imposed by our system to the rail and the noises generated by electric traction by one or more trains not in the cdb. Despite the presence of noise whose amplitude spectrum depends on the type and location of the trains present in different points of the line, the use of the encoding / decoding of the signal, implemented as
• the topology used can vary with respect to that proposed in the examples, by introducing variants such as generators at the center of a section or at the ends of it, number of receivers for every generator unit, different encoding from the track to track or even flexibly set from the central coordination control system (ACC) present to
• Filtering techniques advanced (eg. Looks in amplifier, cross-correlation, etc 255 %) to allow to achieve adequate performance reliability and availability

Landscapes

• Engineering & Computer Science (AREA)
• Automation & Control Theory (AREA)
• Mechanical Engineering (AREA)
• Electric Propulsion And Braking For Vehicles (AREA)
• Train Traffic Observation, Control, And Security (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2015
  • 2015-07-22 EP EP15784491.1A patent/EP3194239A2/de not_active Ceased
  • 2015-07-22 WO PCT/IT2015/000188 patent/WO2016016911A2/en not_active Ceased

Non-Patent Citations (2)

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