本文在转速采样环节采用霍尔速度传感器作为电机速度采样器件，并且采用了M法和T法混合的方法进行测速，这样在低速和高速时都能保证采样精度。
In the aspect of speed sample, HALL speed sensor is adopt, and combined the m method and t method, so the sample precision can be ensured both in the high speed moment and low speed moment.
霍尔叶片传感器主要用于检测汽车发动机曲轴位置和转速，此外还可用于检测无刷电机磁极位置及测速等。
The Hall-effect vane sensor is to be primarily used to sense the angle position and the speed of the crankshaft of the automotive engine, in addition to be used in brushless DC motors.
井下速度检测部分以单片机为核心，通过霍尔速度传感器实时检测速度，超速后即会报警提示，并将超速信息进行存储。
Underground speed detection which based on single chip will real-time detect rate through the hall speed sensor, alarm and prompt after speeding, and store the information of speeding.
井下速度检测部分以单片机为核心，通过霍尔速度传感器实时检测速度，超速后即会报警提示，并将超速信息进行存储。
Underground speed detection which based on single chip will real-time detect rate through the hall speed sensor, alarm and prompt after speeding, and store the information of speeding.
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