Performance of Detecting Track Circuit Pole Alternation in ATS-SP System
Masatoshi IKEDA, Haruo YAMAMOTO, Shigeto HIRAGURI
When stop signal changes to non-stop, the signal polarity of outer track circuit is reversed.
ATS-SP (Automatic Train Stop of SP type) system improves the efficiency of this operation and
its economic effect by utilizing the polarity change for cancelling ATS brake pattern. We have
developed a method of doing the pole change detection more reliably than by the existing version
of ATS-SP, and succeeded in removing a few limitations left hindering the introduction of ATS-SP
by increasing the accuracy of detection. This paper describes the new method.