Patent ID: 7165748
Filing Date: 2007-01-23
Classification: B61L

Abstract:
1. A train position detection system for an onboard device of a train to recognize the absolute position of the train, comprising: ground signaling equipment having, in a section of a track on which said train travels, a ground marker that transmits point passage information to the onboard device passing over the installation point of said ground marker and a ground device capable of transmitting a telegram containing multiple-bit information to said section of said track; and the onboard device having means of recognizing the point passing information from said ground marker and means of receiving said telegram containing multiple-bit information transmitted from said ground device and storing the content of said telegram, characterized in that said ground device transmits, to said section, said telegram containing multiple-bit information indicating the absolute position of said ground marker in said section, and said onboard device receives said telegram when said train with said onboard device mounted thereon is traveling in said section and stores the absolute position of said ground marker in said section, and in response to said point passing information, which serves as a trigger, received when said means of recognizing the point passing information lies directly above said ground marker and said train passes directly above said ground marker, said onboard device recognizes the absolute position of said ground marker in said section of said track as the absolute position of said train.