B - Operations – Transporting – 60 – C
Patent
B - Operations, Transporting
60
C
354/47
B60C 11/00 (2006.01)
Patent
CA 1332981
A method is disclosed for evaluating the level of objectionable noise associated with the operation of a tire by virtue of its tread contacting a road surface, which comprises digitizing the tread de- sign on a coordinate system so as to define load-supporting portions of the tread in contact with the pavement, and distinguish them in binary form from those portions of the tread which are not in con- tact. as multiple matrix elements; defining a generally arcuate pro- file of a leading or trailing edge of a footprint of the tread by fitting an equation to the edge; sequentially performing the time ensemble summation, of the noise produced by each matrix element, over ev- ery matrix element on the entire circumferential surface: converting the sequence of summations to a periodic analog signal: converting the analog signal to a sound; and, aurally evaluating the sound. In a simplified case 0's and 1's along at least one footprint edge are sequentially summed around the circumference of the tire. The system requires only a means for digitizing the tread pattern. a computer to perform the necessary manipulations of data. and a means to convert a digital signal to an analog signal.
558521
Blinn Robert John
Caruso David George
Parker David Hiram
Thrasher Donald Burns
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Uniroyal Goodrich Canada Inc.
Uniroyal Goodrich Licensing Services Inc.
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