...环计数模式 （ Periodic Counting ），频率测量模式 （Frequency Measurement），转动速度测量（Rotational Speed Measurement），周期测
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Have discussed straining the wave method of the rotational speed measurement.
并讨论了转速测量数据的滤波方法。
According to the relationship of rotational speed, power and DC bus voltage, observing rotational speed by using DC bus voltage is proposed to realize none direct speed measurement.
从发电机转速、功率和直流母线电压之间的相互关系出发，提出利用直流母线电压进行转速观测实现无速度传感器。
To enlarge measurement range of particle rotational speed, a dual- frequency imaging method was presented, with mathematical analysis and proving experiment.
为提高颗粒转速测量范围，提出了双帧频拍摄法，并进行了数学推导和实验验证。
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