| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus and a method for improving the measurement of force variation in a tire to be tested with tire uniformity measurement apparatus. SOLUTION: This apparatus includes a load wheel assembly including a load wheel, connected to a load sensor for detecting the force applied to the load wheel by a tire to be tested. To detect the vibration of the load wheel by any other force than the one applied by the tire, the vibration sensor is linked to the load wheel assembly. To provide more accurate uniformity data of a tire, there is provided a means of subtracting a force induced by vibration from the force applied by the tire. A vibration sensor composed of an accelerometer is used to determine the force causing vibration in the lateral and radial directions with respect to the load wheel. A signal obtained by the accelerometer is transmitted to a differential amplifier which accepts a signal from the load cell in the same way. All signals indicate more accurately an actual vibrating force generated by a tire to be tested. COPYRIGHT: (C)2011,JPO&INPIT
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