The Research and Realization of Contactless Collision Early Warning Assistant System

With the progressive achievement of China's modernization and the urban rail transport development, rail transport has entered a rapid developing period, which makes the safety of trains more and more important. Because the traditional way, such as the telephone blocking mode, is difficult to complete the ATP automatic protection system. The aim of this paper is using wireless transmission technology based on the chirp spread spectrum signal (CSS) and the symmetric bilateral ranging method (SDS-TWR) to achieve the contactless train collision warning system that removes ATP. There is also an explanation about the hardware and software of the system.