| 摘要 |
A travel orientation can be calculated with a high degree of accuracy. A travel orientation calculation apparatus of the present disclosure includes a detecting unit that detects a vertical acceleration representing an acceleration in a vertical direction and a horizontal acceleration representing an orientation and a magnitude of an acceleration in a horizontal plane among accelerations generated along with walking of a user, a walking period setting unit that sets a period of time corresponding to two steps of the user as a walking period based on a zero-cross point of the vertical acceleration, an acceleration/deceleration switching phase setting unit that sets an acceleration/deceleration switching phase at which switching between acceleration and deceleration in the user's travel direction is performed based on a phases at which the magnitude of the horizontal acceleration is minimum in the walking period, an acceleration/deceleration section estimating unit that alternately estimates each section delimited at each acceleration/deceleration switching phase as an acceleration section or a deceleration section, and a travel orientation deciding unit that decides the user's travel orientation based on an orientation represented by the horizontal acceleration in the deceleration section and an orientation opposite to the orientation represented by the horizontal acceleration in the acceleration section. |
