At present, the main pedestrian gate identification methods in general includes Infrared detection, IC/ID card, ID card recognition, two-dimensional code recognition, NFC recognition, face recognition, etc.

Infrared detection: infrared detection probes are installed at the entrance and exit of the sidewalk gate. Generally speaking, two pairs are installed at the inlet and outlet respectively, and a total of six pairs are required for some projects. The infrared detection accuracy is high, which can effectively handle the entry and exit of large crowds.

IC/ID card: Compared with infrared detection, IC/ID card recognition method can identify people in and out to a certain extent. The card must be encrypted before sending, and a card reader shall be installed at the door of the sidewalk gate for reading. This kind of card encryption is relatively low-level and easy to crack. Moreover, it is easy for others to use the card if they cannot identify the person who uses the card.

ID card recognition: ID card recognition is different from ordinary card recognition. The ID card is not only different from person to person, but also difficult to crack the replica. It can display the ID card information together with the display system, and it can also identify the passers-by more securely.

QR code recognition: QR code scanning of sidewalk gate, QR code printed by mobile phone display or paper, confirmed according to the predetermined rules, after passing, the QR code of mobile phone is faster. Paper QR code is generally more convenient for one-time visitor system.

NFC recognition: Based on NFC technology, it can communicate with fast growing composite NFC standard devices (such as smart phones, tablets, etc.). Through short distance communication, it can prevent the security problems of possible interception and decryption of far field communication technologies (such as wifi, Bluetooth, etc.). It is suitable for places requiring strict privacy, small in size and low in power consumption.

Face recognition: face recognition can effectively prevent other decryption, theft, camouflage and other situations. Access control can only be opened when the highest security level identification method, fingerprint and ID card recognition, multiple identification methods jointly authenticate identity information, and face information is unified with fingerprint and ID card information. It is applicable to the period when highly confidential locations and identity information need to be strictly screened.