Safety guarantee device of electric roller shutter door

The utility model relates to a safety guarantee device for an electric roller shutter door, which comprises a processor U1, a terminal 6 of the processor U1 is connected with a + 3.3 V power supply, aterminal 8 of the processor U1 is grounded, a capacitor C1 is connected between the two terminals, a terminal 12 of the processor U1 is connected with a resistor R5 and a diode D3 in series and thengrounded, and a terminal 13 of the processor U1 is connected with a resistor R4 and a diode D2 in series and then grounded. Terminals 14, 15 and 16 of the processor U1 are respectively connected withthe travel switches S1, S2 and S3 and then are grounded; and terminals 3, 4, 9 and 10 of the processor U1 are connected with the network module. By adopting a closed-loop control technology and an intelligent algorithm, when the door deformation or door closing obstruction exceeds a set value, the motor immediately stops working, and an alarm can be given to a user through the device; meanwhile, auser can send a door openin