Evaluation method of tire shape changes, the evaluation device of tire shape change, and evaluation system of the tire shape change

摘要

PPROBLEM TO BE SOLVED: To know, in detail, a change of a tire shape such as a detailed uneven abrasion condition of a tire in each of different rolling amounts, in the tire attached to a vehicle to roll on a road face. PSOLUTION: The first rolling condition three-dimensional measured data in at least one partial area arerequired out of the plurality of partial areas of the tire divided into a plurality of portions along a tire circumferential direction, under the first rolling condition where the tire is attached to the vehicle to roll on the road face by a prescribed rolling amount, a reference axis corresponding to a tire shaft of the actual tire is drawn out in response to the first rolling condition three-dimensional measured data, the first rolling condition three-dimensional measured data arecoordinate-transformed based on the reference axis, and the second rolling condition three-dimensional measured data coordinate-transformed therein are compared with the first rolling condition three-dimensional measured data expressed based on the reference axis to draw out a shift amount between the first rolling condition three-dimensional measured data and the second rolling condition three-dimensional measured data. PCOPYRIGHT: (C)2008,JPO&INPIT