A control method of an intelligent door lock, an intelligent door lock and a control system

Abstract

The application provides a control method for an intelligent door lock, specifically comprising the following steps: a mobile terminal identifies the type of the intelligent door lock through an NFC tag and starts the corresponding application program; reads the door lock identity information and verifies; requests user identity authentication after establishing a communication connection; sends the verification information to the door lock after authentication; the door lock is unlocked and the unlocking picture is uploaded to the server through the camera. This method combines NFC tag identification, double identity verification and image recording function, realizes the balance of security and convenience. By comparing the image or mobile terminal shell image in the unlocking picture through the server, the alarm or anti-lock instruction is dynamically triggered, effectively dealing with the risk of device loss or illegal intrusion. At the same time, the door lock integrates a light sensor and an infrared fill light, optimizing the image acquisition quality under different lighting conditions. The application is suitable for home, community and other scenes, and improves the security protection capability of the intelligent door lock.

Description

Technical Field

[0001] This invention relates to the field of Internet of Things (IoT) technology, and in particular to a control method for a smart door lock. Background Technology

[0002] In recent years, the rapid development of IoT technology has driven the deep integration of smart home devices. As the core of home security, smart door locks have gradually replaced traditional door locks as the mainstream choice due to their dual improvements in security and convenience. Most smart door locks on the market today use NFC unlocking technology. Users only need to bring a pre-authorized physical NFC card or a mobile terminal such as a phone bound to this function close to the sensing area to quickly unlock the door, avoiding the pain points of traditional keys being easily lost and inconvenient to carry.

[0003] The core advantage of this technology lies in the efficient experience brought by its contactless interaction: on the one hand, the encrypted communication mechanism of the NFC tag ensures the security of basic identity authentication; on the other hand, the unlocking process does not require physical contact with the lock, significantly improving operational convenience in special scenarios such as rainy days or moving items. Furthermore, compared to password input or fingerprint recognition, NFC unlocking does not require users to actively verify their identity, is faster, and has a higher success rate, making it especially suitable for the elderly, children, and other people who are not tech-savvy when operating smart devices.

[0004] However, NFC unlocking still presents significant security vulnerabilities. When a user loses their linked device or card, a third party can unlock the door directly without secondary verification, essentially transferring the risk of losing the physical key to an electronic device. However, the system lacks a proactive warning mechanism for abnormal unlocking behavior. For example, if an unauthorized user repeatedly unlocks the door using a found card, most locks will neither send an alarm to the homeowner nor distinguish between legitimate users and intruders through log records. This lack of a security feedback mechanism not only increases the risk of property loss but also makes subsequent investigation and evidence collection difficult. Summary of the Invention

[0005] In order to overcome the above-mentioned technical defects, the purpose of this invention is to provide a control method for an intelligent door lock.

[0006] This invention discloses a control method for a smart door lock, specifically including the following steps:

[0007] S1) The mobile terminal approaches the smart lock and identifies the lock type through the smart lock's NFC tag;

[0008] S2) The mobile terminal launches the application corresponding to the smart lock and reads the smart lock's identity information from the NFC tag through the application;

[0009] S3) If the identity information verification is successful, send a communication connection request to the smart door lock;

[0010] S4) Establish a communication connection with the smart lock and request the user's identity information according to the type of smart lock;

[0011] S5) If the user's identity information is successfully authenticated, the application sends the verification information of the mobile terminal to the smart lock.

[0012] S6) After receiving the verification information, the smart door lock automatically unlocks and uploads the verification information to the server.

[0013] Preferably, in S6), after the smart door lock is woken up by NFC, it takes a picture and / or records each unlocking scene. The server then compares the human image recognized in the unlocking scene with the human image stored in the server to determine whether the user is correct, and then makes a corresponding response based on whether the user is correct.

[0014] Preferably, the feature is that when the human image recognized in the unlocking screen matches the human image pre-stored on the server, the smart door lock is correctly unlocked, and the unlocking screen on the server is deleted.

[0015] Even if the image of the user in the unlocking screen does not match the image stored on the server, the smart lock will still be unlocked, the unlocking screen will be saved on the server, and the unlocking screen and alarm information will be transmitted to the user's mobile terminal stored on the server.

[0016] Preferably, in S6), when the smart lock is unlocked for the first time, after capturing and / or recording the initial unlocking screen, the server records the image of the mobile terminal's casing in the unlocking screen. In each subsequent unlocking process, the image is compared with the captured and / or recorded image of the mobile terminal's casing. It is determined whether the mobile terminal matches, and then the user responds correctly.

[0017] Preferably, the smart lock is unlocked correctly when the mobile terminal image recognized in the unlocking screen matches the one recorded by the server.

[0018] Even if the image of the mobile terminal recognized in the unlocking screen does not match the one recorded on the server, the smart lock will still be unlocked, the unlocking screen will be saved on the server, and the unlocking screen and alarm information will be transmitted to the mobile terminal that the user has reserved on the server.

[0019] Preferably, upon receiving an alarm message, the user can send a command to the smart lock via the server to deadbolt the smart lock and disable the mobile terminal's identity information access permissions. Simultaneously, manual unlocking from the inside is prohibited.

[0020] A second aspect of this application also provides a smart lock, which is equipped with a camera that can control the opening and closing of the smart lock via any of the control methods described above.

[0021] Preferably, the smart lock also includes a light sensor and an infrared fill light. When the light sensor detects a low-light scene, the smart lock can automatically turn on the infrared fill light and switch the camera to night vision mode. When the light sensor detects a strong backlight scene, the camera can automatically turn on HDR mode to optimize image quality.

[0022] A third aspect of this application also provides a system comprising a smart lock and a server; wherein the smart lock and the server can operate any of the control methods described above.

[0023] Preferably, the control system also includes a mobile terminal with NFC functionality, which can interact with the smart lock.

[0024] Compared with existing technologies, the above technical solution has the following advantages:

[0025] 1. A smart lock control method based on NFC tags is proposed. When a mobile terminal approaches the lock, the lock type is automatically identified and the corresponding application is launched, achieving dual verification of identity and authentication information to ensure secure unlocking. This method utilizes NFC tags to store lock identity information. After the mobile terminal reads the tag, it triggers a communication module (such as Bluetooth / Wi-Fi) to establish an encrypted connection. The lock's built-in camera captures the unlocking process and uploads the image to a server, forming a complete operation traceability chain that balances convenience and security.

[0026] 2. Facial recognition further strengthens the security verification mechanism. By comparing the image of the person unlocking the door with a pre-stored template in real time on the server side, dynamic identity verification is achieved. When the image does not match, the system still allows temporary unlocking but triggers an alarm message to be pushed to the user's designated terminal. Simultaneously, the unlocking image is saved as evidence for later tracing in suspicious situations. Users can also remotely send a deadbolt command via the server, causing the smart lock to perform a deadbolt action and disable access to suspicious devices, forming a closed loop of "verification-alarm-control" to effectively address the risk of device theft or illegal intrusion.

[0027] 3. A terminal casing image verification technology is also provided. Upon initial unlocking, the device casing features are recorded. Subsequent unlocks compare the real-time image with the casing image recorded on the server. If the casing features do not match, the system triggers a low-level alarm upon unlocking to prevent NFC tag cloning attacks. Furthermore, the casing image database can be dynamically updated to adapt to changes in device appearance (such as changing phone cases), balancing security and user experience.

[0028] 4. The hardware of the smart lock has been optimized by integrating a light sensor and infrared fill light. In low-light conditions, the camera automatically switches to night vision mode, and in strong backlight, it activates HDR mode. This ensures the clarity of the unlocking image under different lighting conditions, providing high-quality image input for facial recognition and shell verification. It addresses the issue of insufficient environmental adaptability of traditional cameras, further enhancing security performance. Attached Figure Description

[0029] Figure 1 This is a flowchart illustrating the intelligent door lock control method provided in this application. Detailed Implementation

[0030] The advantages of the present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments.

[0031] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0032] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0033] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if," as used herein, can be interpreted as "when," "in response to determination," or "when," or "in the event of a determination."

[0034] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0036] In the following description, suffixes such as "module," "part," or "unit" used to denote elements are used only for the convenience of the description of the invention and have no specific meaning in themselves. Therefore, "module" and "part" can be used interchangeably.

[0037] Please see Figure 1 , Figure 1 This is a flowchart illustrating the intelligent door lock control method provided in this application.

[0038] like Figure 1 As shown, the control system of this application includes a mobile terminal and a smart lock. Those skilled in the art will understand that the specific type of mobile terminal is not limited. For example, the mobile terminal can be any mobile device with NFC functionality, such as a mobile phone, tablet, and / or smartwatch; this application does not impose any restrictions. For ease of understanding, a mobile phone will be used as an example below. A smart lock refers to a lock that also has NFC functionality, but is more intelligent and convenient in terms of user security, identification, and management compared to traditional locks. The specific type is also not limited; for example, it can be a multi-tongue lock, an anti-drill lock, etc., and this application does not impose any restrictions.

[0039] The control system specifically includes the following steps:

[0040] S1) The mobile terminal approaches the smart lock and identifies the lock type through the smart lock's NFC tag;

[0041] Specifically, this can be understood as follows: First, the mobile phone needs to identify the type of door lock via NFC tag. Subsequently, depending on the different security requirements of each door lock type, it determines whether to perform secondary verification. For example, when encountering situations like community door locks or elevators where access efficiency is prioritized and high security is not required, the mobile phone can directly execute subsequent steps (S2) and beyond to improve access efficiency. However, when encountering scenarios like residential entrances where security is paramount, the mobile phone requires the user to provide further identity information, such as biometric recognition (facial recognition, fingerprint recognition, etc.); or login status verification (password input, application login, etc.), to achieve two-factor authentication and further enhance security. This achieves a comprehensive optimization of access efficiency and security.

[0042] S2) The mobile terminal launches the application corresponding to the smart lock and reads the smart lock's identity information from the NFC tag through the application;

[0043] Specifically, the “application” mentioned herein may be a dedicated application for certain smart locks, or it may simply be an application that allows a mobile phone to call up an NFC card. Those skilled in the art can design it as needed, and this application does not impose any restrictions.

[0044] S3) If the identity information verification is successful, send a communication connection request to the smart door lock;

[0045] This can be understood as follows: after successfully verifying the identity of the smart lock, the mobile phone can send a communication connection request to the smart lock so that subsequent data interaction can be carried out through the communication protocol. Specifically, the communication protocol can include BLE protocol, WiFi protocol, ZigBee protocol, and Thread protocol, etc., and can be one of them or any combination thereof. This application does not impose any restrictions here.

[0046] S4) Establish a communication connection with the smart lock and request the user's identity information according to the type of smart lock;

[0047] After the connection is established, the smart door lock begins to request the user's identity information, and proceeds to the next step after the information is verified.

[0048] S5) If the user's identity information is successfully authenticated, the application sends the verification information of the mobile terminal to the smart lock.

[0049] At this point, the mobile phone sends its identity information to the smart lock via a referencing program. The smart lock then obtains this identity information through the established communication connection, thus completing the identity verification process. Specifically, the mobile phone's identity information may include the user's unique identifier.

[0050] S6) After receiving the verification information, the smart door lock automatically unlocks and uploads the verification information to the server.

[0051] After receiving the correct verification information, the smart lock sends a notification to the mobile phone, which then sends a further unlocking command to the smart lock. This unlocking command is sent via the aforementioned communication connection. Upon receiving the command, the smart lock automatically unlocks, thus completing the entire unlocking process. It also uses its built-in camera to capture and / or record each unlocking action and uploads the footage to the server.

[0052] On the one hand, when a mobile phone is used to unlock a smart lock, the smart lock can record data such as the time and the phone's information, forming a complete unlocking log and uploading it to the cloud (server). On the other hand, during unlocking, the smart lock also records each unlocking scene through a camera, thus forming a complete record and a comprehensive traceable data chain, improving security performance.

[0053] The above is a description of the basic concept of the embodiments of this application. Those skilled in the art will understand that further designs can be made on this basis to further improve the security performance. The following will illustrate possible embodiments.

[0054] In one possible implementation, in S6), after the smart lock is woken up by NFC, it takes pictures and / or records each unlocking scene. The server compares the human image recognized in the unlocking scene with the human images stored in the server to determine whether the user is correct, and then makes an appropriate response based on whether the user is correct.

[0055] Specifically, the smart lock can either directly recognize a person's image and take a video, or it can directly record an image and upload it to the cloud (server), where the server recognizes and saves the image. After the server recognizes the image, it compares it with pre-stored images to determine if the user is correct. Those skilled in the art will understand that the method of pre-storing the image is not limited. In one possible implementation, the image can be automatically pre-stored upon the user's first use, or manually pre-stored upon subsequent uses. In another possible implementation, the image can be a user-confirmed image after multiple unlocking attempts using the same person. This application also does not impose any limitations on this.

[0056] The specific content of the corresponding response is also not limited. In one possible implementation, when the image of the person recognized in the unlocking screen matches the image stored on the server, the smart lock is unlocked correctly, and the unlocking screen is deleted from the server. When the image of the person recognized in the user's unlocking screen does not match the image stored on the server, the smart lock is still unlocked, the unlocking screen is saved on the server, and the unlocking screen, along with alarm information, is transmitted to the user's mobile terminal (i.e., mobile phone) pre-registered on the server.

[0057] By deleting the unlocking screen during facial recognition, the server can effectively protect user privacy and prevent leaks due to server attacks. If the facial image doesn't match, an alert is immediately sent to the user, allowing for immediate confirmation and transmitting the unlocking screen to their phone, simplifying post-incident investigation. Furthermore, allowing the door to remain unlocked even when the facial image doesn't match prevents authorized individuals, such as relatives staying over or plumbers, from being unable to open the door.

[0058] Furthermore, upon receiving an alarm message, the user can send a command to the smart lock via the server to deadbolt the smart lock and disable access permissions for the mobile device's identity information. Simultaneously, manual unlocking from the inside is prohibited. This prevents unauthorized access by stealing NFC information. Users can also remotely send deadbolt commands via the server to cause the smart lock to perform the deadbolt action and disable access permissions for suspicious devices, forming a closed loop of "verification-alarm-control" to effectively address the risks of device theft or unauthorized intrusion.

[0059] The above is a complete embodiment of improving the security performance of smart door locks through facial recognition. In another possible implementation, security performance can also be improved through the casing of a mobile device.

[0060] Similarly, in one possible implementation, in S6), when the smart lock is unlocked for the first time, after capturing and / or recording the initial unlocking screen, the server records an image of the mobile terminal's casing in the unlocking screen. During each subsequent unlocking process, this image is compared with the captured and / or recorded image of the mobile terminal's casing. It is determined whether the mobile terminal matches, and then the user responds appropriately.

[0061] It should be noted that the specific meaning of "shell" in this solution is not limited. In one possible implementation, the shell can refer to the outer casing of the mobile device itself, such as the back cover and frame. In another possible implementation, the shell can refer to a protective case fitted onto the mobile device, such as a phone case and a tablet case; this application does not impose any limitations on this.

[0062] Furthermore, when the mobile terminal image detected in the unlocking screen matches the one recorded on the server, the smart lock unlocks correctly. Even if the mobile terminal image does not match the one recorded on the server, the smart lock still unlocks, the unlocking screen is saved on the server, and the unlocking screen, along with alarm information, is transmitted to the user's pre-registered mobile terminal on the server. The device's casing features are recorded upon the first unlock; subsequent unlocks compare the real-time image with the casing image recorded on the server. If the casing features do not match, the system triggers a low-level alarm while unlocking to prevent NFC tag cloning attacks. The system can also dynamically update the casing image database to adapt to changes in device appearance (such as changing phone cases), balancing security and user experience.

[0063] Similarly, when the mobile terminal image detected in the unlocking screen matches the record on the server, the smart lock unlocks correctly. Even if the image doesn't match, the smart lock still unlocks, the unlocking screen is saved on the server, and transmitted along with an alarm message to the user's pre-registered mobile terminal. Upon receiving the alarm message, the user can send a command through the server to the smart lock to deadbolt it and disable the mobile terminal's access to their identity information. Simultaneously, manual unlocking from the inside is prohibited.

[0064] The above are several possible implementations of the smart door lock control method of this application. A second aspect of this application also provides a smart door lock equipped with a camera, which can control the opening and closing of the smart door lock using any of the control methods described above.

[0065] It should be noted that the specific structure of the smart lock is not limited. In one possible implementation, the smart lock also incorporates a light sensor and an infrared fill light. When the light sensor detects a low-light scene, the smart lock can automatically turn on the infrared fill light and switch the camera to night vision mode. When the light sensor detects a strong backlight scene, the camera can automatically activate HDR mode to optimize image quality. This optimizes the smart lock hardware by integrating a light sensor and an infrared fill light, automatically switching the camera to night vision mode in low-light environments, and activating HDR mode in strong backlight conditions. This ensures the clarity of the unlocking image under different lighting conditions, providing high-quality image input for facial recognition and shell verification, solving the problem of insufficient environmental adaptability of traditional cameras, and further improving security performance.

[0066] A third aspect of this application also provides a system comprising a smart lock and a server; wherein the smart lock and the server can operate any of the control methods described above.

[0067] Preferably, the control system also includes a mobile terminal with NFC functionality, which can interact with the smart lock.

[0068] It should be noted that the embodiments of the present invention have better implementability and are not intended to limit the present invention in any way. Any person skilled in the art may use the above-disclosed technical content to change or modify it into equivalent effective embodiments. However, any modifications or equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A control method for a smart door lock, applied to a mobile terminal, characterized in that, Includes the following steps: S1) The mobile terminal approaches the smart lock and identifies the lock type through the smart lock's NFC tag; S2) The mobile terminal launches the application corresponding to the smart lock and reads the identity information of the smart lock from the NFC tag through the application; S3) If the identity information verification is successful, send a communication connection request to the smart door lock; S4) Establish a communication connection with the smart lock and request the user's identity information according to the type of the smart lock; S5) If the user identity information authentication is successful, the verification information of the mobile terminal is sent to the smart lock through the application. S6) The smart door lock automatically unlocks after receiving the verification information and uploads the verification information to the server.

2. The control method as described in claim 1, characterized in that, After being woken up by NFC, the smart lock captures and / or records each unlocking scene. The server compares the human image recognized in the unlocking scene with the human images pre-stored on the server to determine whether the user is correct, and then takes appropriate action based on whether the user is correct.

3. The control method as described in claim 2, characterized in that, When the human image recognized in the unlocking screen matches the human image pre-stored on the server, the smart door lock is unlocked correctly, and the unlocking screen is deleted from the server. When the image of the user unlocking screen does not match the image stored on the server, the smart lock is still unlocked, the unlocking screen is saved on the server, and the unlocking screen and alarm information are transmitted to the user's mobile terminal stored on the server.

4. The control method as described in claim 1, characterized in that, In step S6), when the smart lock is unlocked for the first time, after capturing and / or recording the initial unlocking screen, the server records the image of the mobile terminal's casing in the unlocking screen; and in each subsequent unlocking process, it compares the mobile terminal's casing image with the image captured and / or recorded by the smart lock; determines whether the mobile terminal is consistent, and then determines whether the user makes the correct response.

5. The control method as described in claim 4, characterized in that, When the mobile terminal image detected in the unlocking screen matches the record of the server, the smart door lock is unlocked correctly; When the image of the mobile terminal detected in the unlocking screen does not match the one recorded by the server, the smart lock is still unlocked, the unlocking screen is saved on the server, and the unlocking screen and alarm information are transmitted to the mobile terminal that the user has reserved on the server.

6. The control method according to claims 3 and 5, characterized in that, When the user receives an alarm message, they can send a command to the smart lock through the server to lock the smart lock from the inside and disable the mobile terminal's identity information access permissions; at the same time, the smart lock cannot be manually unlocked from the inside.

7. A smart door lock, characterized in that, A camera is provided, and the camera can control the opening and closing of the smart door lock using the control method described in any one of claims 1-6.

8. The smart door lock as described in claim 7, characterized in that, The smart door lock is also equipped with a light sensor and an infrared fill light; when the light sensor detects a low-light scene, the smart door lock can automatically turn on the infrared fill light and switch the camera to night vision mode; when the light sensor detects a strong backlight scene, the camera can automatically turn on HDR mode to optimize image quality.

9. A control system, characterized in that, It includes a smart lock and a server; wherein the smart lock and the server can run the control methods of claims 1-6.

10. The control system as claimed in claim 9, characterized in that, The control system also includes a mobile terminal with NFC functionality, which can interact with the smart lock.

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