Pioneer Electronic Corporation

Toshiharu Baba

Junichi Nishida

Masahiko Sakaguchi

Morio Araki

Takeharu Arakawa

Kenichi Nobe

Jun Shinohara

Michihiro Kaneko

Tessho Ishida

Yasushiro Ayukai

Hitoshi Kaneko

Tatsuya Okamoto

Motoki Ishiguro

A method and system for deriving a travel distance of an object which travels. As one aspect, a travel velocity of the object producing a pulse signal in response to travel of the object on the basis of a number of pulses of the pulse signal per unit time is calculated, and a plurality of unit travel distances corresponding to a plurality of travel states of the object every travel state are calculated. The plurality of travel states are different from each other and the unit travel distance is a travel distance per pulse calculated by dividing the calculated travel velocity by the number of the pulses of the pulse signal per unit time. And the plurality of calculated unit travel distances are memorized individually, from the plurality of memorized unit travel distances, the unit travel distance corresponding to the travel state of the object which is under travel is selected, and the travel distance of the object on the basis of the selected unit travel distance and the pulse signal is derived.

Method and system for deriving travel distance of vehicle

An angular velocity sensor is provided for detecting an angular velocity of a motor vehicle. A right turn and left turn of the motor vehicle are detected. In response to the detected right turn and left turn, positive and negative correction coefficients are obtained. The detected angular velocity is corrected with either of the correction coefficients. A bearing of the motor vehicle is calculated with a corrected angular velocity.

Automotive navigation system

A method of processing information of a recording disc among a plurality of recording discs having different standards or recording formats, includes the steps of: selecting and exchanging an objective recording disc to be reproduced among the plurality of recording discs; executing a recording information reproducing operation on the basis of an application program of the selected objective recording disc; and selecting and exchanging the objective recording disc only with respect to the recording discs, having the standard or recording format reproducible by the application program, among the plurality of recording discs after executing the recording information reproducing operation.

Method of processing information of recording disc and apparatus for

A navigation device includes measurement unit for measuring a current position of a vehicle and generating a current position data, route collection unit for generating route data on the basis of the current position data, place name extraction unit for extracting place name information with a predetermined interval from a map information in accordance with the current position data, storage unit for storing the route data and the place name information, the stored route data comprising a plurality of block route data each sectioned by the place name information, edit unit for editing the block route data stored in the storage unit, and display unit for extracting the route data from the storage unit and displaying the extracted route data together with the map information.

Navigation device

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Kawagoe, Japan

Toshiharu Baba