A safety system for continuously checking the integrity of a railway train

摘要

The system (1) comprises an electric line (L) which extends along the train; and head apparatus (HA) and tail apparatus (EA) connected to the ends of the line (L). The head apparatus (HA) comprises a DC voltage supply (10) operable to apply to the line (L) a DC voltage of predetermined value and a detector (16) operable to generate an alarm upon loss of a given signal on the line (L). The tail apparatus comprises a generator of the said signal (19) coupled to the line (L) and a DC/DC converter (21) the input of which is connected to the line (L) and the output of which is connected to the signal generator (19) to provide to this latter a supply voltage derived from that generated by the first supply device (10) of the head apparatus (HA). The system (1) is such that an interruption of the train capable of causing interruption to the said line (L) is able to cause deactivation of the signal generator (19) of the tail apparatus (EA), which can be detected and signalled by the detector (16) of the head apparatus (HA). <IMAGE>