Title:
TRAVEL DISTANCE CALCULATOR FOR VEHICLE
Document Type and Number:
Japanese Patent JP3348881
Kind Code:
B2
Abstract:
PURPOSE: To eliminate any error from the standpoint of traveling due to skidding to the utmost as well as to make an error from the calculational point of view hard to occur too, thereby calculating the travel distance of a vehicle so accurately.
CONSTITUTION: At each of pulse period measuring means 3a and 3b, periods Tia, Tib of input pulses Pia, Pib corresponding to each rotation of respective axles are separately measured, while at each of compensated pulse period operational means 5a and 5b, compensated pulse periods ATia, ATib are operated on the basis of the latest pulse periods Tia, Tib whose measurement is completed and corresponding wheel diameters Da, Db. At a selecting means 7, these compensated pulse periods ATia, ATib themselves are compared with each other, selecting a shorter side, and an output pulse generating means 8 outputs the pulse pertinent to the short period selected by this selector means 7 as an output pulse Po. Likewise, a travel distance calculating means 9 counts the supplied output pulse Po extending over the specified distance measuring time, thereby calculating the travel distance from the number of output pulses Po and a distance of one pulse.
Inventors:
Yukihiro Watanabe
Kenichi Tanaka
Kenichi Tanaka
Application Number:
JP25698492A
Publication Date:
November 20, 2002
Filing Date:
September 25, 1992
Export Citation:
Assignee:
Nippon Vehicle Manufacturing Co., Ltd.
International Classes:
B60L3/00; B61L25/04; G01C22/02; G01P3/42; (IPC1-7): G01C22/02; B60L3/00
Domestic Patent References:
| JP4312303A | ||||
| JP5249127A | ||||
| JP1153909A | ||||
| JP645165U |
Attorney, Agent or Firm:
Tsutomu Adachi
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