| 摘要 |
<p>In a frictional characteristic measuring apparatus, a sensor section emits a sound wave, which gives vibration to an object to be measured, as an incident sound wave, and receives a reflected sound wave generated by reflection of the sound wave on the object to be measured. An operational processing section derives a loss tangent of a viscoelastic characteristic of the object to be measured based upon the reflected sound wave received by the sensor section. Further, the operational processing section calculates a frictional characteristic from the derived loss tangent by means of a prescribed conversion constant. Moreover, the operational processing section previously emits an incident sound wave in a state where the object to be measured is not present, and stores the reflected sound wave as a reference value.</p> |
