The invention provides a method and a device for identifying
access control identity based on ultrasonic
waves. The method comprises the following steps of enabling each user to install an
access control APP (application) at a hand-held mobile terminal, and use the ID (identity) to register as the user of the
access control APP; generating an encrypting key and a decrypting key; enabling an access control
machine to obtain the information of the users, and storing into a local
database; when the distance between the hand-held mobile terminal and the access control
machine is controlled within the setting range, using an encrypting
algorithm and the encrypting key to encrypt the ID to obtain encrypting information, converting the encrypting information into a data frame, converting the data frame into an ultrasonic
signal by an ultrasonic digital encoding type, transiting the ultrasonic
signal via a
loudspeaker, enabling the access control
machine to receive the ultrasonic
signal and convert the ultrasonic signal into the data frame, demodulating, and decrypting to obtain a
plain text; if the
plain text is matched with the information of the local
database, automatically opening a door. The method and the device for identifying the access control identify based on the ultrasonic
waves have the beneficial effects that the safety is higher, the use cost is reduced, and the reliability is higher.