Within each hundredth of a second, the sensors see 12 pulses of light and using the generated  pulse train, the processor calculates that the wheel is spinning at 25 rotations a second and  then sends this information to the computer.

在每百分之一秒内， 传感器会看到 12 个光脉冲， 利用生成的脉冲序列，处理器计算出车轮以每秒 25 转的速度旋转， 然后将该信息发送到计算机。