Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle diagnosis or maintenance indication
Patent
1995-10-03
1998-04-28
Nguyen, Tan Q.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle diagnosis or maintenance indication
701 29, 340438, 340439, 731173, G06F 1700, G01M 1500
Patent
active
057458642
ABSTRACT:
A vehicular information storage device includes an EEPROM, an extracting device which processes and extracts vehicle information, a determination device which determines from among regions set beforehand the region of the extracted information, and a counting device for incrementing a counter in correspondence with the region determined by the determination device. The needed information is extracted properly at a predetermined period along with the determination of the region where such information belongs. Further, the EEPROM used by the system is composed of three data regions with all three data regions set to a reset state at an initial state. The data regions are decremented sequentially at a minimum period required by a measurement parameter. Since updating from "1" to "0" is possible for individual cells and there is no need for resetting, processing time is reduced. Also, when data in one of the data regions is determined to be irregular due to, e.g., a power outage, it can be restored using the count values of the two other data regions.
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Hosoe Katsuharu
Itoh Teruyoshi
Yamamoto Toshihisa
Nguyen Tan Q.
Nippondenso Co. Ltd.
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