In the context of the vigorous development of smart home technology, smart door locks, as the first line of defense for home security, have attracted significant attention to their technological innovations. The emergence of Ultra-Wideband (UWB) chips has brought a new secure and touchless unlocking solution to smart door locks, gradually transforming people's understanding of traditional door locks.??
?Working Principle of UWB Chips??
UWB technology uses nanosecond to microsecond-level non-sinusoidal narrow pulses to transmit data. In the application of smart door locks, UWB chips play a core role. Typically, a UWB receiving module is installed on the door lock, while the user's device (such as a mobile phone or keychain) is equipped with a UWB transmitting module (tag). When the user approaches the door lock, the UWB transmitting module emits pulse signals at a certain frequency. After the UWB receiving module of the door lock receives the signals, it calculates the precise distance between the user and the door lock by measuring the Time of Flight (TOF) of the signals and combining it with the speed of light. For example, Feirui Intelligent's centimeter-level positioning solution for UWB modules, through advanced UWB wireless communication technology, can control the positioning accuracy within centimeters. Compared with traditional positioning technologies such as Bluetooth and Wi-Fi, it has a higher bandwidth, lower time delay, and more accurate location information.??
(Significant Security Advantages)??
Resistance to Signal Forgery and Relay Attacks??
The timestamp ranging mechanism of UWB is extremely critical. The signal transmission time strictly corresponds to the physical distance, and any delay or replication of the signal will be acutely identified as an anomaly by the system, effectively resisting relay attacks. For instance, attempts by lawbreakers to remotely "deceive" the door lock through signal amplifiers are difficult to succeed under the protection of UWB technology. Meanwhile, UWB signals support physical layer encryption. Combined with dynamic key management technology, they ensure data transmission security at the hardware level, greatly improving the security level—far surpassing traditional solutions that rely on software encryption.??
Integration with Biometric Recognition??
UWB smart door locks can be combined with biometric verification methods such as fingerprint and facial recognition to build a dual protection system of "physical location + identity authentication." The door lock will only unlock when the user is within the safe distance of the door lock and the biometric information matches, further reducing the risk of illegal intrusion and adding an extra layer of protection for home security.??
?Touchless Unlocking for Convenient Experience??
When the user carries a paired device close to the UWB smart door lock, the lock can automatically sense and unlock without manual operation. This "instant unlocking" touchless experience completely subverts traditional unlocking methods. For example, when returning home with both hands full of items, the user does not need to rummage for keys or operate a mobile phone—simply approaching the door lock allows direct entry, truly achieving a convenient homecoming experience. Additionally, UWB smart door locks can record users' entry and exit habits, providing valuable data support for home security monitoring.??
?Strong Environmental Adaptability??
In complex home environments, devices such as Bluetooth headsets, Wi-Fi routers, and microwaves easily cause signal interference. UWB technology, with its wide bandwidth characteristic, enables short-pulse signals to effectively avoid the influence of narrowband interference sources. Its low-power design also ensures long-term stable operation of the device, maintaining reliable communication quality even in high-density signal environments. Whether in underground garages, high-rise apartments, or old residential areas, UWB smart door locks can stably achieve "touchless unlocking," avoiding the embarrassment of users experiencing "waiting time" or "repeated verification."??
?Integration into the Smart Home Ecosystem??
UWB smart door locks are not only the physical entrance to the home but also the core node of the smart home ecosystem. By (linking) with home security systems, lighting devices, thermostats, etc., they can trigger rich scene-based automated responses. When the door lock detects multiple abnormal unlocking attempts, it can immediately (link) the camera to capture images and push alarm information to the user's mobile phone. It can also actively optimize the unlocking threshold based on users' behavior patterns or dynamically adjust the security level according to family members' habits, achieving true intelligent management.??
The secure and touchless unlocking solution using UWB chips in smart door locks, with its excellent security, convenient touchless experience, strong environmental adaptability, and deep integration into the smart home ecosystem, is becoming the new direction for the technological development of smart door locks. It brings unprecedented home security and convenient experience to users and promotes the smart home industry to new heights.
