Apparatus for detecting wheel grip on road

Details Apparatus for detecting wheel grip on road Apparatus for detecting wheel grip on road

1994-08-26

1996-02-27

Noland, Thomas P.

Measuring and testing

Frictional resistance, coefficient or characteristics

36442401, G01N 1902

Patent

active

054938937

ABSTRACT:
An apparatus for detecting a wheel grip on a road has a wheel speed sensor for detecting a revolution speed of a wheel of a vehicle, a plurality of band-pass filters for filtering an output of the wheel speed sensor at a plurality of frequency bands, and a reference value memory device for storing in memory reference values dependent on the revolution speed of the wheel. The reference values are set for each of the frequency bands of the plurality of band-pass filters. The wheel grip on road is detected based on the correlation between that signal output for each of the frequency bands which is obtained through the band-pass filters and that reference value for each of the frequency bands which is stored in memory in the reference value memory device.

REFERENCES:
patent: 3992922 (1976-11-01), Noble
patent: 3993270 (1976-11-01), Gallacher
patent: 4212063 (1980-06-01), Hiidmark
patent: 4545220 (1985-10-01), Leiber
patent: 4882693 (1989-11-01), Yopp
patent: 5394329 (1995-02-01), Bridgen

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