By B. Ning
This designated quantity on complicated teach keep watch over platforms (ATCS) contains chosen papers from the hugely winning COMPRAIL convention sequence on railways and different transit platforms. complicated teach keep watch over structures are enjoying a tremendous function in bettering the potency and security of teach operation, appearing as their "brains and nerves." Computer-based ATCS's make railways extra trustworthy and more secure. in general, those platforms encompass 4 components: the important keep watch over method; the station keep an eye on structures and wayside structures; the on-board regulate structures; and the verbal exchange community, together with cellular communique. From the viewpoint of the complete lifecycle, an ATCS contains layout and improvement; re-design for a different line software; simulation verification and checking out; and safeguard evaluation of the approach and subsystems. those options are recognized to people who are accustomed to usual ATCS comparable to ETCS, CTCS for major line railways and CBTC for transit structures.
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2 Radio interface unit The radio interface unit receives the distance-to-go information from the radio unit at every 40 ms period. Because the ground equipment sends the distance-to-go information of all trains using a channel, the radio interface unit can receive the null information to itself. Then it must select the distance-to-go information for itself by the distinctive train number contained in the information. And it receives the location information from the reception and control unit and transmits it to the on-board radio unit.
For driverless train operation, availability of the data communication system is essential to enable the CBTC system to safely replace the driver. The radio solution fulfils the following requirements: • Robustness to guarantee the very high level of availability required, despite the diversity of the environments: alternating between tunnels and open air sections, interference and masking. The signal modulation is based on Direct Spread Spectrum Sequence (DSSS). The demodulation takes into account the energy carried by the various multi-paths to “rebuild” the signal transmitted.
Applying the developed technology, it is expected that track circuits outside switch stations become unnecessary for train separation control. Trial tests have been carried out and the results are good enough for utilization. At the first application, we have decided to introduce the developed system as a substitute system which will realize safer substitute block operation. In the future, the system will become major train protection system of the Shinkansen lines. , Digital automatic train control system for the Shinkansen lines of East Japan Railway Company.