| 摘要 |
<P>PROBLEM TO BE SOLVED: To highly accurately detect a travel position of a train on board with a simple constitution. <P>SOLUTION: A position of the train is detected by comparing a TG position by a signal from a speed generator 3 with a GPS position from a GPS receiver 4, and the detected train position is corrected by a singular point passing signal when a pick-up device 2 passes through a singular point such as a rail joint and a branch part by extracting a waveform characteristic of both a vertical vibration signal of the train output from an acceleration sensor 5 and an acoustic signal output from a sound collecting device 6. When position measuring accuracy of the GPS receiver 4 changes, or even if a signal from the speed generator 3 becomes inaccurate by idle rotation or gliding of a wheel, the train position is corrected, and the train position is highly accurately detected. <P>COPYRIGHT: (C)2012,JPO&INPIT |
