| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive Young's modulus measuring instrument of a small size easy to be handled. SOLUTION: A spherical or substantially spherical contact is provided in an end part of a rodlike ultrasonic oscillator with a support-fixed resonance node of a length vibration mode, variations of pressure and a resonance frequency when pressing the ultrasonic oscillator onto an object are detected by a means for detecting pressure when bringing the contact of the ultrasonic oscillator into pressure contact with the object, a self-exciting oscillation circuit for exciting the rodlike ultrasonic oscillator, and a means for measuring an oscillation frequency of the self-exciting oscillation circuit, and arithmetic processing is carried out using those to find the Young's modulus of the object. COPYRIGHT: (C)2005,JPO&NCIPI
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