A smart lock system

Abstract

This application discloses a smart lock system, relating to the field of home security technology. The system includes: a door, with a hidden sensor module integrated inside the exterior door panel; the hidden sensor module includes a radar sensor, a UWB antenna, and a voice receiving module. The radar sensor detects objects approaching the door; the voice receiving module collects sounds around the door; a main control MCU, located inside the door, is electrically connected to the radar sensor, UWB antenna, and voice receiving module; and a motor control system, including a motor driver chip and a DC motor. The input of the motor driver chip is connected to the main control MCU, and the output is connected to the DC motor to drive the bolt. This smart lock system eliminates the need for a front panel, avoiding the problem of exposed panels being easily damaged or having their passwords stolen. While ensuring the smart lock functions normally, it minimizes security risks associated with smart locks.

Description

Technical Field

[0001] This application relates to the field of home security technology, specifically to a smart lock system. Background Technology

[0002] Smart locks are structurally more complex than ordinary locks, typically consisting of an electronic lock body and a mechanical lock body. The electronic components include a main control chip, a motor drive module, sensors (such as fingerprint recognition and radar sensing), and a wireless communication module (Wi-Fi, Bluetooth, UWB, etc.). They support multiple unlocking methods, such as digital passwords (fixed passwords, temporary dynamic passwords) and wireless communication (NFC, Bluetooth, mobile app, UWB near-field sensing).

[0003] To prevent users from opening the lock without their phone or keys, existing smart locks typically have a physical front panel with a touch module. Users can then unlock the lock by entering a password via the touch module, using a camera on the front panel for facial recognition, or using a fingerprint sensor. However, the physical front panel leads to design redundancy and presents security risks such as vulnerability to damage and exposure of the operating logic. Utility Model Content

[0004] This application provides a smart lock system that minimizes security risks while ensuring the smart lock functions properly.

[0005] The system includes: a door, with a hidden sensor module integrated inside the exterior door panel; the hidden sensor module includes a radar sensor, a UWB antenna, and a voice receiving module, wherein the radar sensor is used to detect objects approaching the door; and the voice receiving module is used to collect sounds around the door.

[0006] The main control MCU is located inside the door and is electrically connected to the radar sensor, UWB antenna and voice receiving module respectively.

[0007] The motor control system includes a motor driver chip and a DC motor. The input terminal of the motor driver chip is connected to the main control MCU, and the output terminal is connected to the DC motor to drive the locking tongue.

[0008] In one alternative implementation, the system further includes a wireless communication module connected to the main control MCU for communicating with the server and mobile terminal.

[0009] In one optional implementation, the system further includes a voice control module.

[0010] The input end of the voice control module is connected to the voice receiving module, and the output end is connected to the main control MCU. The voice control module is used to process voice commands.

[0011] In one optional implementation, the system further includes a current detection circuit connected to the DC motor and the main control MCU for real-time monitoring of the motor's operating current.

[0012] In one alternative embodiment, the door also includes a concealed mechanical keyhole located at a target position on the door.

[0013] In one optional implementation, a switch / lock button is provided on the inner side of the door; the switch / lock button is used to trigger the main control MCU to send an unlocking command to the motor control system.

[0014] The technical solution provided in this application may include the following beneficial effects:

[0015] In the smart lock system of this application, a hidden sensor module is integrated inside the outdoor door panel. This hidden sensor module includes a radar sensor, a UWB antenna, and a voice receiving module. The radar sensor detects objects approaching the door; the voice receiving module collects sounds around the door; a main control MCU, located inside the door, is electrically connected to the radar sensor, UWB antenna, and voice receiving module; and a motor control system includes a motor driver chip and a DC motor. The input of the motor driver chip is connected to the main control MCU, and its output is connected to the DC motor to drive the bolt. This smart lock system eliminates the need for a front panel, avoiding the problem of exposed panels being easily damaged or having their passwords stolen. While ensuring the smart lock functions properly, it minimizes security risks associated with smart locks. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a smart lock system according to an exemplary embodiment. Detailed Implementation

[0018] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] In the description of the embodiments of this application, the term "correspondence" may indicate that there is a direct or indirect correspondence between two things, or that there is an association between two things, or that there is a relationship of instruction and being instructed, configuration and being configured, etc.

[0020] Figure 1 This is a schematic diagram illustrating the structure of a smart lock system according to an exemplary embodiment. Figure 1 As shown, the system includes: a door, with a hidden sensor module integrated inside the exterior door panel; the hidden sensor module includes a radar sensor, a UWB antenna, and a voice receiving module, wherein the radar sensor is used to detect objects approaching the door; and the voice receiving module is used to collect sounds around the door.

[0021] The main control MCU is located inside the door and is electrically connected to the radar sensor, UWB antenna and voice receiving module respectively.

[0022] The motor control system includes a motor driver chip and a DC motor. The input terminal of the motor driver chip is connected to the main control MCU, and the output terminal is connected to the DC motor to drive the locking tongue.

[0023] Optional, such as Figure 1 As shown, the radar sensor can be a 5.8GHz radar module.

[0024] When a user enters a designated area within the door (e.g., within 1 meter), a millimeter-wave radar sensor embedded inside the outdoor door panel detects human movement and sends a trigger signal to the main control MCU. The main control MCU then activates the UWB communication module to perform two-way authentication with the user's UWB terminal.

[0025] In this embodiment, the UWB communication module and the UWB terminal can verify the terminal's identity using the AES-128 encryption protocol. Once authentication is successful, the precise distance can be calculated by measuring the UWB signal's Time-of-Flight (ToF). If authentication is successful and the distance is ≤0.3 meters, the main control MCU sends a PWM control signal to the motor drive chip, driving the DC motor to perform the unlocking action. At this time, the current detection circuit monitors the motor's operating current in real time. When the current value reaches a preset threshold (e.g., 350mA), it determines that the latch has retracted to the correct position and sends a feedback signal to the main control MCU to terminate power supply.

[0026] If UWB verification fails or no valid terminal is detected, the main control MCU can activate the voice receiving module, for example, by using endpoint detection (VAD) technology to capture continuous voice; then, it compares the voice with a preset wake-up word (such as "emergency unlock") using a preset voice extraction algorithm; after successful wake-up, the user is required to read aloud a 6-digit one-time password, which is then matched with the hash value of the temporary password sent from the cloud after acoustic feature extraction. If the verification is successful, the motor unlocking process is triggered.

[0027] Optionally, in the embodiments of this application, such as Figure 1 As shown, the system also has a built-in speaker module. When the smart lock interacts with the user via voice, it can send preset voice prompts to prompt the user to execute corresponding commands, such as instructing the user to read aloud a 6-digit one-time password.

[0028] In one alternative implementation, the system further includes a wireless communication module connected to the main control MCU for communicating with the server and mobile terminal.

[0029] Specifically, when the wireless communication module (such as a Wi-Fi / BLE dual-mode chip) connects to the main control MCU via the UART interface, the system establishes a secure channel with the cloud server. This module enables the main control MCU to receive dynamic voice password hash values ​​and UWB terminal authorization policies from the server in real time, while simultaneously synchronizing the unlocking event log (including timestamps, verification methods, and terminal IDs) to the cloud database.

[0030] In one optional implementation, the system further includes a voice control module, the input of which is connected to a voice receiving module and the output of which is connected to a main control MCU. The voice control module is used to process voice commands.

[0031] In this embodiment, the voice control module receives user voice and compares it with the set wake-up voice and temporary password voice to determine unlocking permissions. Specifically, in this embodiment, after the voice receiving module acquires the voice, it can use high-pass filtering and VAD endpoint detection techniques to extract valid audio segments from the voice; then, it calculates the similarity between the features of the extracted valid audio segments and the pre-stored voice features; then, it uses a voice recognition algorithm to identify the numeric strings in the valid audio segments and compares them with the preset password or the password sent from the cloud, thereby triggering an unlocking command.

[0032] Furthermore, in this embodiment of the application, the voice control module may also pre-record authorized voiceprints, and the unlocking command can only be triggered when the voiceprint in the valid audio segment matches the authorized voiceprint.

[0033] In one optional implementation, the system further includes a current detection circuit connected to the DC motor and the main control MCU for real-time monitoring of the motor's operating current.

[0034] Inside a smart lock, the bolt movement consists of two phases: an unloaded phase and a collision phase. During the unloaded phase, the bolt moves freely within the guide rails, so the motor only needs to overcome frictional resistance, resulting in low load torque and a stable low motor current. However, during the collision phase, the bolt strikes the latch / stop block, causing a sharp increase in mechanical resistance and load torque, leading to a proportional increase in current. Therefore, the peak current corresponds to the maximum load point, which is the end of the bolt's physical travel. By monitoring the motor's operating current, it can be determined whether the bolt has reached its physical end point.

[0035] Furthermore, when the current detection circuit detects that the motor's operating current exceeds a specified threshold, it will control the motor to stop working, thereby preventing the motor from burning out due to continuous work or damaging the lock body due to excessive pressure.

[0036] In one alternative embodiment, the door also includes a concealed mechanical keyhole located at a target position on the door.

[0037] In this application, the main consideration is the increased risk of the door lock being forcibly broken due to the front panel. Therefore, this application completely eliminates the door panel area and instead uses a voice module UWB module that can be hidden inside the door body to unlock. However, under this design, a mechanical keyhole is still required so that the user can unlock the door with a mechanical key if the electronic equipment malfunctions.

[0038] Similarly, to reduce the risk associated with keyholes, the mechanical keyhole needs to be designed to be concealed. Alternatively, the keyhole can be completely invisible on the door's exterior. Only when unlocking is needed, the user touches or inputs a specific gesture (such as pressing a specific area of ​​the door handle) to trigger a micro-spring mechanism, causing the cover to automatically slide open or flip to reveal the keyhole.

[0039] In one optional implementation, a switch / lock button is provided on the inner side of the door; the switch / lock button is used to trigger the main control MCU to send an unlocking command to the motor control system.

[0040] In addition to contactless unlocking methods such as "no front panel + wireless / voice / UWB", a physical button is also installed on the inside of the door (interior side). This button is specifically designed to issue "unlock" or "lock" commands directly from the inside. Located on the inside panel, this button allows people inside to easily press it when entering or exiting, eliminating the need for a mobile phone or UWB key, a wake-up phrase, or voice recognition.

[0041] Optionally, one end of the button is electrically connected to a GPIO (or dedicated input interrupt) pin of the main control MCU via a wire; the other end of the button is grounded (or powered), forming a closed loop when pressed, and the MCU pin level changes.

[0042] The MCU detects a change in the input pin level from high (or low) to low (or high), indicating a "button press" event. Simultaneously, the MCU's firmware is configured with interrupt or polling detection logic; once a "press" signal is captured, the "inner unlock" process begins. Based on the button state, the MCU outputs the corresponding PWM or digital enable signal to the control input pin of the motor driver chip (motor control system). Upon receiving this signal, the motor driver chip supplies power to the DC unlocking motor and controls its rotation direction, completing the retraction (unlocking) or extension (locking) action of the bolt.

[0043] In summary, the smart lock system of this application integrates a hidden sensor module inside the outdoor door panel. This hidden sensor module includes a radar sensor, a UWB antenna, and a voice receiving module. The radar sensor detects objects approaching the door; the voice receiving module collects sounds around the door; the main control MCU is located inside the door and is electrically connected to the radar sensor, UWB antenna, and voice receiving module; the motor control system includes a motor driver chip and a DC motor. The input of the motor driver chip is connected to the main control MCU, and the output is connected to the DC motor to drive the bolt. This smart lock system eliminates the need for a front panel, avoiding the problem of exposed panels being easily damaged or having their passwords stolen. While ensuring the smart lock functions properly, it minimizes security risks associated with smart locks.

[0044] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0045] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A smart lock system, characterized in that, include: The door body has a hidden sensor module integrated inside the exterior door panel; The hidden sensor module includes a radar sensor, a UWB antenna, and a voice receiving module. The radar sensor is used to detect objects approaching the door; the voice receiving module is used to collect sounds around the door. The main control MCU is located inside the door and is electrically connected to the radar sensor, UWB antenna and voice receiving module respectively. The motor control system includes a motor driver chip and a DC motor. The input terminal of the motor driver chip is connected to the main control MCU, and the output terminal is connected to the DC motor to drive the locking tongue.

2. The system according to claim 1, characterized in that, The system also includes a wireless communication module, which is connected to the main control MCU and used to communicate with the server and mobile terminal.

3. The system according to claim 1, characterized in that, The system also includes a voice control module. The input end of the voice control module is connected to the voice receiving module, and the output end is connected to the main control MCU. The voice control module is used to process voice commands.

4. The system according to claim 1, characterized in that, The system also includes a current detection circuit, which connects the DC motor to the main control MCU, and is used to monitor the motor's operating current in real time.

5. The system according to claim 1, characterized in that, The door also includes a hidden mechanical keyhole, located at a target position on the door.

6. The system according to any one of claims 1 to 5, characterized in that, An on / off lock button is provided on the inside of the door; the on / off lock button is used to trigger the main control MCU to send an unlocking command to the motor control system.

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