BATTERY-FREE SMART KEY AND INTELLIGENT ENTRANCE GUARD UNLOCKING SYSTEM AND UNLOCKING METHOD THEREOF USING SAME

摘要

An intelligent entrance guard unlocking method includes: transmitting electric energy of an intelligent entrance guard by wireless electromagnetic radiation via a transmit coil; receiving the electric energy via a receive coil of a battery-free smart key; controlling a infrared transmit unit of the battery-free smart key to transmit an infrared signal containing an identification code of the battery-free smart key to the intelligent entrance guard; obtaining a predefined identification code from a first storage unit of the intelligent entrance guard and comparing the identification code with the predefined identification code; unlocking the intelligent entrance guard when the identification code matches with the predefined identification code and not unlocking the intelligent entrance guard when the identification code does not match with the predefined identification code.