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激光扭振仪是丹麦B&K生产的BK2523型激光扭振仪。基于激光和多普勒效应实现非接触式扭振测量。频率范围:0.3~1000Hz,角速度范围:0.3~7000º/s,角位移范围:0.01~12º,速度:30~7200rpm。该设备适用于无法在旋转物体上安装传感器场合的扭振测量,无需对待测轴加装或改装齿轮,非常简单、快捷。