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- 测量转速,使用霍尔传感器,被测轴安装有12只磁钢,即转轴每转一周,产生12个脉冲,要求将转速值(转/分)显示在数码管上。-Measurement speed, the use of Hall sensors, the measured axial magnet 12 is installed, that is, to a week of each axis to produce 12 pulses requested speed value (r/min) showed that in the