| 摘要 |
Provided is a detection method for at least one of acti ng forces on tire among a back-and-forth directional force, a lateral force, vertical force, and a moment about a tire axis, to detect by strain outputs of strain sensors, which are attached on the tire and measure the strains of a sidewall portion. The above-mentioned strain sensors comprise
first strain sensors that have the gain maximum line, in which the gain thereof becomes max, inclining to one side of the circumferential direction of the tire at an angle of 45 deg. with respect to the tire radial direction line, and
second strain sensors that have the gain maximum line inclining to the other side of the circumferential direction of the ti re at an angle of 45 deg. with respect to the tire radial direction line. At least four pairs of sensors, in which one of the above-mentioned first strain sensors and one of the above-mentioned second strain sensors are made a pair, are arranged at regular intervals on the circumference line of one circle. The method comprises
a strain measuring step to measure the strain of the sidewall portion with each of the above-mentioned strain sensors simultaneously at the rotational position P based on the tire rotational standard position X and to obtain the strain output per each strain sensor, and
an acti ng force calculating step to calculate the above-mentioned force acting on tire based on the strain output per strain sensor obtained on this strain measuring step. |
