| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for measuring a linear elastic modulus capable of reducing influences of disturbance such as vibration and electrical noise and, even when damping due to viscosity stress is high, capable of highly accurately and stably measuring the linear elastic modulus of a linear elastic body, and provide a linear elastic modulus measuring apparatus.SOLUTION: A linear elastic modulus measuring apparatus 100 computes a vibration velocity dx/dt of a vibrating body 1 from displacement of the vibrating body 1 that has been placed in contact with a linear elastic body, multiplies the dx/dt by a linear velocity feedback gain Gto generate a feedback control signal Fs and applies force Fv proportional to the vibration velocity of the vibrating body 1 to the vibrating body 1 using the Fs to cause the vibrating body 1 to undergo self-excited vibration. A linear elastic modulus kof the linear elastic body is computed from a frequency fwhen self-excited vibration of the vibrating body 1 is detected and a mass (M) of the vibrating body 1. |
