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Title:
DEVICE AND METHOD FOR DERIVING CONVERSION FACTOR
Document Type and Number:
Japanese Patent JP2010249578
Kind Code:
A
Abstract:

To provide a technology to derive a distance conversion factor according to a situation.

A pre-processing part 40 sequentially averages GPS speeds contained in obtained positioning data for a predetermined period of time and sequentially measures the obtained number of pulses for the period. A temporary conversion factor deriving part 42 sequentially derives temporary factors for the conversion factor from the number of pulses to a moving distance based on the averaged GPS speed and the measured number of pulses. A filter processing part 46 sequentially performs statistical processing on the derived temporary factors. A correction control part 44 outputs the statistically processed temporary factor or the derived temporary factor as the conversion factor.


Inventors:
KONDO TAKAHIRO
Application Number:
JP2009000097200
Publication Date:
November 04, 2010
Filing Date:
April 13, 2009
Export Citation:
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Assignee:
VICTOR COMPANY OF JAPAN
International Classes:
G01C22/00; G01C21/00; G01S19/52
Domestic Patent References:
JPH0518777A1993-01-26
JPH0814928A1996-01-19
JP2003185466A2003-07-03
Attorney, Agent or Firm:
森下 賢樹



 
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