NFC passive lock with key authentication function

Abstract

The invention discloses an NFC passive lock with a key authentication function. The NFC passive lock comprises NFC intelligent equipment and a passive lock circuit. According to the NFC passive lock,through a unique double-sided spiral structure antenna, energy transmission efficiency is greatly improved, and sufficient energy is provided for reliable unlocking by a control circuit; through mutual matching between an energy coil and a tag coil, the energy coil and the tag coil both work in an optimal state, energy transmission and information transmission are performed simultaneously, and reliable control over unlocking is realized; by adding an energy storage circuit, charging cannot be performed unless a rectifying voltage is higher than a certain voltage, tag response is accelerated, and user experience is improved; moreover, key authentication is required for unlocking, unauthorized operation is eradicated, and the NFC passive lock is safer; by adding a sensor circuit, unlocking control and lock state uploading can be accurately performed; and by adopting a special driving circuit for unlocking, reliable unlocking is guaranteed, a background perception function is achieved, whether the lock on site is closed or not is discovered in time, and therefore the NFC passive lock has the advantages of being safe and reliable in unlocking, having a state uploading function and being simple in maintenance in a later period.

Description

technical field [0001] The invention relates to the related field of near-field communication technology, in particular to an NFC passive lock with key authentication. Background technique [0002] Today, when wireless technology is flourishing and changing with each passing day, products and applications based on NFC near-field communication technology have developed rapidly, especially in public transportation, access control, mobile payment, identification, air parcel and luggage identification, mail sorting, warehousing and electronic anti-counterfeiting and other fields have been widely used. [0003] In the field of electronic locks, the convenient experience brought by keyless has become more and more popular among the public. At present, most of the passive locks using NFC technology on the market are still powered by batteries, which are not only not environmentally friendly, but also have a short service life. Large size, heavy weight, high cost, troublesome use w...

AI Technical Summary

Problems solved by technology

[0003] In the field of electronic locks, the convenient experience brought by keyless has become more and more popular among the public. At present, most of the passive locks using NFC technology on the market are still powered by batteries, which are not only not environmentally friendly, but also have a short service life. Large size, heavy weight, high cost, troublesome use when the battery is low, and so-called NFC passive lock products are mostly in the concept stage, the energy collected by the antenna is small, and it is impossible to truly unlock the lock reliably.

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