When power is lost, manual & electric dual purpose elevator can also be used.
手电两用升降机无电时也能使用。
In conventional elevator controls, high accurate sensors of position and speed are used for this purpose. However these additional sensors increase the cost of system and decrease the reliability.
在传统的电梯曳引系统中，通常采用高精度的位置和速度传感器来检测转子的位置和速度信息，增加了系统的成本，降低了系统的可靠性。
Now commonly used by a single sensor on the elevator control system to detect, And its spectrum analysis, Failure to achieve the purpose of diagnosis.
目前普遍采用单一传感器对提升机控制系统进行检测，并对其频谱进行分析，达到对故障诊断的目的。
Now commonly used by a single sensor on the elevator control system to detect, And its spectrum analysis, Failure to achieve the purpose of diagnosis.
目前普遍采用单一传感器对提升机控制系统进行检测，并对其频谱进行分析，达到对故障诊断的目的。
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