| 摘要 |
PURPOSE:To easily attain the frequency difference between the bending secondary oscillation and the twisted oscillation into a permissible range, by independently providing weights for coarse and fine adjustment for the twisted oscillation on the node of the bending secondary oscillation. CONSTITUTION:Weights 52, 53 for the adjustment of the frequency fF of the bending secondary oscillation are provided at the tip of a tuning fork type oscillator 51, and weights 54, 55 for rough adjustment of the frequency fT of the twisted oscillation and weights 56, 57 for fine adjustment are independently provided near the node on he tuning fork arm of the bending secondary oscillation. When a difference deltaf between the frequencies fF and fT is far from the target, the weights 54, 55 for rough adjustment are adjusted to match the value to the target and then the weights 56, 57 for fine adjustment are adjusted to match the difference deltaf between the frequencies fF and fT within the permissible range. |
