Automatic safety discharging device and safety discharging method for demagnetizing equipment

The invention relates to an automatic safety discharging device and a safety discharging method for demagnetizing equipment. The automatic safety discharging device comprises a controller, a comparator, an equipment power voltage sampling circuit, a reference voltage generating circuit, an uninterruptible power supply, a switch and a discharging loop, wherein the discharging loop, the switch and an electric storage capacitor of the demagnetizing equipment are connected in series, the controller is connected with the comparator and the switch, the comparator is connected with the equipment power voltage sampling circuit and the reference voltage generating circuit, the equipment power voltage sampling circuit is connected with a power supply of the demagnetizing equipment and outputs sampled voltage to the comparator, the reference voltage generating circuit is connected with the uninterruptible power supply and outputs reference voltage to the comparator, the comparator compares the sampled voltage with the reference voltage and transmits signals to the controller to switch on the switch if the sampled voltage is lower than reference voltage, so that the capacitor is discharged, and the switch is switched off if the sampled voltage is higher than reference voltage. A demagnetizing device of the demagnetizing equipment and the automatic safety discharging device cannot mutually interfere, and the whole process can be automatically performed.