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Title:
SPEED CALCULATOR
Document Type and Number:
Japanese Patent JP3511070
Kind Code:
B2
Abstract:

PURPOSE: To always detect the speed closer the actual speed of an object to be detected at the sampling time point in a speed calculator for calculating the speed of the object to be detected based on the counted value of a detected pulse having the frequency corresponding to the speed of the object to be detected.
CONSTITUTION: Calculating means 8 samples the outputs of counting means 3, detected pulse time measuring means 6, and detected pulse counting means 2 and fetches the sampling times at that time, the input time of the detected pulse and the counted values at the input time. Present time predicting calculator 12 obtains a mean speed in each sampling period and the time corresponding to the mean speed based on the data obtained at each sampling time, applies an approximate equation for satisfying the relationship between the mean speed, its time and the sampling time of the present time point and calculates the predicted value Vsi at the sampling time at the present time point.


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Inventors:
Kakeshita, Yoshiaki
Otsuka, Yoshiyuki
Application Number:
JP1995000100934
Publication Date:
March 29, 2004
Filing Date:
April 25, 1995
Export Citation:
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Assignee:
SHIMPO IND CO LTD
International Classes:
G01P3/489; (IPC1-7): G01P3/489
Attorney, Agent or Firm:
岡田 和秀