Integrating device and integrating method

• US 6,188,972 B1
• Filed: 10/15/1998
• Issued: 02/13/2001
• Est. Priority Date: 10/15/1997
• Status: Expired due to Term

• Current Assignee: Calsonic Kansei Corporation
• Original Assignee: Kansei Company, Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Nakamura, Yoshihito, Kobayashi, Masakazu
• Primary Examiner(s): Hoff, Marc S.
• Assistant Examiner(s): VO, HIEN XUAN
• Application Number:
  US09/173,169
• Time in Patent Office: 852 Days
• Field of Search: 702/165, 702/85, 702/149, 701/29-31, 701/35, 701/123, 340/438, 340/441
• US Class Current: 702/165
• CPC Class Codes: G01C 22/02 by conversion into electric waveforms and subsequent integration, e.g. using tachometer generator G01C22/002, G01C22/004, G01C22/006 take precedence

Abstract

An integrating device includes: a non-volatile memory for storing a value of an integrated running distance of a vehicle; an arithmetic processor for calculating a new integrated running distance by a signal generated at each predetermined running distance and also by the integrated running distance stored in the non-volatile memory; and a display unit for displaying the integrated running distance. The non-volatile memory stores a positive value lower than a predetermined reference value as an initial value of the integrated running distance, and the arithmetic processing means outputs a value obtained when the predetermined reference value is subtracted from the integrated running distance, to the display means as the integrated running distance in the case where a value of the integrated running distance stored in the non-volatile memory is not less than the predetermined reference value.

Claims

1. An integrating device comprising:

a non-volatile memory for storing a value of an integrated running distance of a vehicle;

an arithmetic processing means for calculating a new integrated running distance by a signal generated at each predetermined running distance and also by the integrated running distance stored in the non-volatile memory; and

a display means for displaying the integrated running distance;

wherein the non-volatile memory stores a positive value lower than a predetermined reference value as an initial value of the integrated running distance, and the arithmetic processing means outputs a value obtained when the predetermined reference value is subtracted from the integrated running distance, to the display means as the integrated running distance in the case where a value of the integrated running distance stored in the non-volatile memory is not less than the predetermined reference value.

2. An integrating device according to claim 1, wherein the arithmetic processing means outputs a value obtained when the predetermined reference value is subtracted from a second reference value, to the display means as the integrated running distance in the case where a value of the integrated running distance stored in the non-volatile memory becomes not less than the second reference value which is higher than the predetermined reference value.

3. An integrating method for calculating and outputting a new integrated running distance by a value of an integrated running distance of a vehicle stored in a predetermined non-volatile memory and also by a signal generated at each predetermined running distance, the integrating method comprising the steps of:

previously storing a positive value lower than a predetermined reference value in the non-volatile memory as an initial value of the integrated running distance; and

outputting a value obtained when the predetermined reference value is subtracted from the integrated running distance as the integrated running distance in the case where a value of the integrated running distance stored in the non-volatile memory is not less than the predetermined reference value.

4. An integrating method according to claim 3, wherein a value obtained when the predetermined reference value is subtracted from the second reference value is outputted as the integrated running distance in the case where a value of the integrated running distance stored in the non-volatile memory becomes not less than the second reference value higher than the predetermined reference value.