Method for preventing false alarm of starting and stopping states of main mine ventilator

The invention belongs to the technical field of coal mine safety, and relates to a method for preventing false alarm of the on-off state of a main ventilator of a mine. Comprising the following steps that corresponding induction current values of the main ventilator running at different frequencies are detected; a high-precision potentiometer in the start-stop sensor is adjusted, and the sensing lowest critical threshold value and the corresponding lowest sensing frequency of the start-stop sensor are determined; the frequency modulation function of the main ventilator frequency conversion control cabinet is utilized to carry out association setting on the main ventilator and the standby ventilator, and seamless connection of the on-off states of the main ventilator and the standby ventilator is achieved. According to the method, the situation that in the switching process of the main ventilator and the standby ventilator, when the ventilator operates at the low frequency band, the safety monitoring system mo