ELECTRONIC ODOMETER - NIPPON SEIKI KK

Title:

ELECTRONIC ODOMETER

Document Type and Number:

Japanese Patent JP2848119

Kind Code:

B2

Abstract:

PURPOSE: To obtain a recording means wherein, in order to hold the correct numerical value of data in an upper-place memory in which an error becomes especially large, it is not required to take the trouble to hold the same data in a plurality of memories in an electronic odometer wherein an EEPROM whose number of rewrite operations is limited is used as a nonvolatile memory used to hold travel distance data for a vehicle.
CONSTITUTION: A memory area in a nonvolatile memory 3 is divided into groups A, B, C, D. In addition, each group is divided into an upper-place memory 31 and a lower-place memory 32. The lower-place memory 32 is used by the rotation of each group; the upper-place memory 31 holds data by the rotation of each group. As a result, the data in the upper-place data is held in each group with prescribed logicality; it is possible to easily detect erroneous data and to easily compute a correct data numerical value.

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Inventors:

TAMURA SHIGEAKI
SHIMAZU YOICHI

Application Number:

JP13555192A

Publication Date:

January 20, 1999

Filing Date:

March 31, 1992

Export Citation:

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Assignee:

NIPPON SEIKI KK

International Classes:

G01C22/00; (IPC1-7): G01C22/00

Domestic Patent References:

JP28713A
JP6338112A
JP62254013A
JP6060515A

Attorney, Agent or Firm:

Akira Kondo

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