管壁材料的折射率越大，测量体的位置与管壁厚趋时位移差也越大。

If the refractive index is larger, the translocation difference of the measurement volume is larger.

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采用高分辨率的增量式光电编码器和相应的硬件接口电路，实现了变磁阻电机转子在定子两个齿之间位移的检测。

Using an optical incremental encoder and hardware interface, the position of the motor rotor between the two teeth of the motor stator is measured.

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在常位移的情况下，能量释放率将随时间而减少，直到它达到某一较低的极限值。

In the case of constant displacement, the energy release rate will decrease with time, until it reaches a lower limit value.

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