Mitsubishi Denki Kabushiki Kaisha

Mazda Motor Corporation

Teruki Akamatsu

Mitsuo Shimotani

Makoto Mikuriya

Toshimichi Tokunaga

Kazuhiro Yokouchi

Tadatomi Ishigami

Hirofumi Goto

Yoshiaki Hirasa

Katsuro Hayami

Haruto Yano

Norihiro Naito

Yuichiro Uchigaki

Toshiyuki Matsuo

Location equipment includes a calibration unit for calibrating scale factors used for calculating distances traveled by left and right wheels of a vehicle from pulse signals delivered from wheel sensors respectively installed in the left and right wheels, based on global positioning satellite signals received by a GPS receiver, and an estimation unit for estimating vehicle position and movement from the GPS signals received by the GPS receiver and the pulse signals delivered from the wheel sensors, using the scale factors calibrated by the calibration unit.

Apparatus for determining the behavior of a vehicle

A navigation system comprises a map information storage device for storing map data, a route setting device for setting a route between two points on the map data, target intersection detecting device for detecting a target intersection on the route from the set route and the map data, present position detector for detecting the present position of a mobile body, quantization computing device for quantizing the set route into simple graphics, and display for displaying the quantized route on a stepwise basis according to the distance between the nearest target intersection and the present position. The navigation system is capable of reducing the amount of distraction posed to a vehicle driver, is highly versatile and reduces the cost of the system.

Navigation system providing simplified navigation instructions using graphics and voice guidance to preferred routes and using landmarks

A navigation system for a movable body wherein a moving locus of the movable body displayed on a screen of display means can be identified readily and clearly from a map displayed on the screen to prevent misunderstanding of the map. The system comprises a map storage device in which a map is stored, a current position detecting device for detecting a current position of the movable body, a locus storage memory for storing therein a locus of the movable body provided by successively detected ones of the current position, a display unit having a screen, and a switching device for the switching between a mode in which the map from the map storage device, a current position and a locus of the movable body from the current position detecting device and the locus storage device are displayed on the screen and a second mode in which the map and the current position are displayed on the screen but the locus is not displayed on the screen. The navigation system further has a function of causing a locus to be displayed on the screen in accordance with a scale of a map displayed on the screen.

Navigation system for movable body

Growing community of inventors

Tokyo, Japan

Teruki Akamatsu