| 摘要 |
PROBLEM TO BE SOLVED: To provide a mobile terminal and the like, which are capable of estimating a boarding position within carriages of a train from information that can be detected by only a mobile terminal without the need for installing special infrastructure facilities in the carriages.SOLUTION: The mobile terminal comprises: front and rear wheels peak detection means for detecting, from time sequential acceleration data outputted from an acceleration sensor, two values of peak acceleration that are generated at front wheels and rear wheels of the train; and boarding position estimation means for, by using a difference between the peak acceleration generated first and the peak acceleration generated later, calculating a distance from front wheels or rear wheels and estimating, as a boarding position, a position away from the front wheels or the rear wheels by the distance. The acceleration data is composite acceleration data calculated from 3-axial data that is outputted from the acceleration sensor. The mobile terminal further comprises long-period extraction means for extracting a long period from the time sequential composite acceleration data by using an auto-correlation function. The front and rear wheel peak detection means acquires the two values of peak acceleration which are averagely detected by periodical addition average processing relative to the long-period composite acceleration data. |
