To obtain a redundant system formable at a low cost by preparing a common processor that has a prescribed processing function the same as those of plural processors, a means that switches a processor in which an abnormal processing state has been detected, to the common processor, etc.
The transmitters a1 to an have the filter circuits, modulation circuits, amplifier circuits, etc., in mutually the same constitution. The transmitter a1 of the first stage and the transmitter an of the final stage can transmit prescribed train control signals to the 1st and n-th track circuits respectively. A common transmitter a0 has the same constitution as those of transmitters a1 to an and has a function which can be substituted for that of any of transmitters a1 to an. Then, a switching part B can switch the transmitter a0 to one of transmitters a1 to an by the switching signal sent from a logical part A.
SAEGUSA HIDETAKA
FUJIWARA KOJI
SAWADA YASUO
SUGAWARA ATSUSHI
