Michima Ogawa

Map navigation software of the electro-multivision of the '91 Toyoto Soarer

This paper describes the Electro-Multivision map navigation software mounted in the Toyota Soarer (1991). The following functions are required of on-board map navigation software: 1. Indication of the exact position of the vehicle to the driver. 2. Determination of the optimum path to the destination and presentation of this route to the driver in the simplest way. 3. Accommodation of a wide variety of destinations and settings for different users. The following gives some examples of how these functions are achieved and outlines the associated technologies. 1. Path finding and associated display technology Path finding algorithm and technology for displaying the calculated on the map; construction of a data base on CD-ROM. 2. Technology for determination of the current position utilizing map matching and the global positioning system(GPS). A method with improved reliability based on two current position outputs obtained using map matching and the GPS and the mutual compensation method. 3. Software vendor participation technology Utilization of CDCRAFT and methods of determining and setting the destination devised by software vendors. Finally, an outline is given of the course of future development of on-board navigation systems.

PC-card applied navigation system and its communication function enhancement : MIUT with mobile multimedia techniques

Abstract The high-mobility work force find their in-vehicle-use computers to be very effective business tools and now anticipate a mobile computer with the location or map navigation function. Denso has thus developed a Mobile Information Unit and Terminal (MIUT) targeted to an entirely new market segment in addition to the in-vehicle navigation sector: people who want their office on wheels. The MIUT comes with two PC-card slots, one for hard-disk (HD)-applied navigation function, the other for a digital communication card for tele-data function, both in direct contact with the MIUT Information Center. The present report provides information on the new system, based on enhanced vehicle communication, thanks to its on-site/communication ability and flexibility in the use of standardized PC-card interface with Mobile Multimedia Techniques.