Asahi Kasei Kabushiki Kaisha

Masahiro Konda

Masaya Yamashita

Shiro Kobayashi

Yuko Akagi

Tsuyoshi Masuda

A travel direction determination apparatus is provided, including: a sensor signal acquisition unit that acquires sensor signals from sensors mounted in a mobile device; a first travel direction calculation unit that calculates a travel direction of the user without relying on a walking state of the user; a second travel direction calculation unit that calculates the travel direction of the user based on the sensor signals when the user who holds the mobile device is in a walking state; and a determination unit that determines the travel direction of the user first to the travel direction calculated by the first travel direction calculation unit, and then to the travel direction calculated by the second travel direction calculation unit, responding to changes in the state of the user from non-walking state to walking state.

Travel direction determination apparatus, map matching apparatus, travel direction determination method, and computer readable medium

To estimate an accurate travel direction of a user based on sensor signals from a mobile device being held by the user even if the user moves ahead while moving the mobile device right and left, a travel direction information output apparatus, a travel direction information output method, and a computer readable medium are provided, the travel direction information output apparatus including a travel direction estimation unit that calculates a travel direction of the user, a rotation amount calculation unit that calculates rotation amounts about a gravity axis of the mobile device being held by the user, and a selection unit that selects, based on an integrated value of the rotation amounts, from either to output travel direction information according to the travel direction calculated by the travel direction estimation unit or to output travel direction information that keeps previous travel direction information output.

Travel direction information output apparatus, map matching apparatus, travel direction information output method, and computer readable medium

In order to accurately identify a hold state of a mobile device held by a user while the user is moving, provided is a hold state change detection apparatus including an acquiring section that acquires an output signal of a sensor mounted in the mobile device held by the user; a change detecting section that detects a change in a hold state of the mobile device based on the output signal of the sensor; and a hold state judging section that judges the hold state based on the output signal of the sensor. During a prescribed time from the time when the change detecting section detects the change in the hold state, information indicating the hold state prior to the detection of the change in the hold state is output. Also provided is a hold state change detection method and program.

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Tokyo, Japan

Masahiro Konda