Magnetic suction screen cabinet door lock based on Internet of Things and object feature recognition and unlocking method

Abstract

The invention relates to a magnetic attraction screen cabinet door lock based on the Internet of Things and object feature recognition and an unlocking method, and relates to the field of power system cabinet door locks. By the adoption of the magnetic attraction structural design, the magnetic attraction type lock has high portability and is suitable for temporary locking requirements, compared with a traditional fixed lock, the magnetic attraction type design does not need complex installation tools or operation, installation and disassembly can be rapidly completed, construction time and human input are reduced, and the magnetic attraction type lock is particularly suitable for occasions needing flexible allocation; moreover, multiple unlocking modes including object feature recognition unlocking, server remote platform authorization unlocking, mobile phone App or applet unlocking, emergency mechanical unlocking and the like are supported, the use flexibility is greatly improved, and compared with a single unlocking mode of a traditional intelligent lock, the intelligent lock can better adapt to complex application scenes, and the intelligent lock is more convenient to use. And safe unlocking can still be ensured under special conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power system cabinet door locks, and in particular to a magnetic screen cabinet door lock and an unlocking method based on the Internet of Things and object feature recognition. Background Art

[0002] Although traditional mechanical locks are widely used in distribution station cabinets due to their simple structure and low cost, their limitations are gradually emerging with the development trend of intelligent and automated distribution stations. First, mechanical locks have low security and are easily affected by technical opening or violent destruction, especially during the maintenance of key equipment, which provides the possibility of illegal intrusion. Secondly, mechanical locks rely on physical keys for management, which not only easily leads to problems such as key loss or duplication, but also increases the complexity and difficulty of management. Once a key is lost or the authority is changed, the lock must be replaced or the management measures must be adjusted, which brings inconvenience to daily operations and generates additional costs. Finally, traditional mechanical locks lack remote control capabilities, which means that all unlocking or locking operations must be completed on-site, which cannot meet the needs of modern distribution stations for remote maintenance and security monitoring.

[0003] As a newer technology, electronic password locks do improve security and management flexibility compared to mechanical locks, but they also come with their own challenges. On the one hand, although setting a password can enhance security, there is a risk that the password will be peeped, recorded or shared, thus creating new security risks. In addition, frequent password changes also increase the complexity of management. On the other hand, since electronic password locks rely on electronic components, they may fail during use due to power supply problems or harsh environmental conditions, increasing the difficulty and cost of maintenance. More importantly, although electronic password locks provide a certain degree of permission management function, they are usually difficult to seamlessly connect with remote management systems and lack real-time status feedback and remote control capabilities, which is an obvious defect for large-scale distribution stations that require full-time monitoring.

[0004] RFID and IC card access control systems have been used in some power distribution stations, using identity cards to verify permissions and unlock, improving security and convenience. However, such systems also face the risk of cards being easily lost or copied, as well as the problem of high card management and production costs. At the same time, the operation of the card access control system is still limited to the site, and does not support remote authorization and dynamic management. Summary of the invention

[0005] The purpose of the present invention is to provide a magnetic screen cabinet door lock and unlocking method based on the Internet of Things and object feature recognition to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above object, the technical solution adopted by the present invention is: In a first aspect, the present invention provides a magnetic screen cabinet door lock based on the Internet of Things and object feature recognition, which is magnetically connected to the screen cabinet. The magnetic screen cabinet door lock based on the Internet of Things and object feature recognition includes: A lock body, which is magnetically connected to the door of the screen cabinet, and has a motor mounting seat arranged therein, a motor is mounted in a first hole of the motor mounting seat, a motor gear is sleeved at a power output end of the motor, the motor gear is meshed with a gear portion of a lock tongue, a mechanical lock core is sleeved in a sleeve portion of the lock tongue, a first end of the mechanical lock core is located in a mechanical lock hole on the front side of the lock body, and a second end of the mechanical lock core is rotatably connected to a second hole of the motor mounting seat; and A lock buckle, which is magnetically connected to the cabinet frame of the screen cabinet and buckled with the lock tongue; The lock body further includes a PCB board, the PCB board is connected to the motor and the camera module on the front side of the lock body, a plurality of lock body magnets are installed in the lock body, and a plurality of lock buckle magnets are installed in the lock buckle.

[0007] In a possible implementation, the lock body further includes a battery, and the battery is connected to the motor, the camera module, and the PCB board.

[0008] In a possible implementation, a control module connected to the motor and a power module connected to the battery are integrated on the PCB board.

[0009] In a possible implementation, a face recognition module connected to the camera module is also integrated on the PCB board.

[0010] In a possible implementation, the PCB board is also integrated with a communication module connected to the server and a Bluetooth module connected to the mobile terminal.

[0011] In a possible implementation manner, a monitoring module for detecting the lock body status information is also integrated on the PCB board.

[0012] In a possible implementation, a buzzer for emitting a prompt sound or a warning sound is also integrated on the PCB board.

[0013] In a possible implementation, the mobile terminal is a mobile phone or a tablet.

[0014] In a second aspect, the present invention provides a multi-mode unlocking method, which is applied to the magnetic screen cabinet door lock based on the Internet of Things and object feature recognition as described above, and the method includes: Remote authorized unlocking: remote unlocking commands are initiated through the server, which are limited to authorized administrators under role authority management; the unlocking commands are pushed to the communication module of the PCB board in real time via the MQTT protocol, and the communication module performs the unlocking operation through the control module after receiving the commands; Object feature recognition unlocking: local identity authentication is performed using the face recognition module in combination with the camera module. The face recognition module uses the OpenCV open source library to process images and match features. When the biometric features are consistent with the pre-stored template, unlocking is completed; Emergency mechanical unlocking: When the magnetic screen cabinet door lock fails or the battery is low on power, the traditional key is inserted into the mechanical lock core to unlock it, ensuring that it can be opened safely even when the magnetic screen cabinet door lock system fails.

[0015] In a possible implementation, the method further includes: Intelligent switching unlocking mode: object feature recognition unlocking is prioritized, and when the object feature recognition unlocking fails, it is switched to the remote authorization unlocking; when the object feature recognition unlocking and the remote authorization unlocking fail, the emergency mechanical unlocking is enabled.

[0016] The beneficial effects brought about by the technical solution provided by the present invention include at least: 1. Convenient installation and disassembly By adopting the magnetic structure design, it is highly portable and suitable for temporary locking needs. Compared with traditional fixed locks, the magnetic design of the present invention does not require complicated installation tools or operations, can quickly complete installation and disassembly, and reduces construction time and manpower investment. It is particularly suitable for occasions that require flexible deployment; 2. Diversified unlocking methods The present invention supports multiple unlocking methods, including object feature recognition unlocking, server remote platform authorization unlocking, mobile phone App or applet unlocking, emergency mechanical unlocking, etc., which greatly improves the flexibility of use. Compared with the single unlocking method of traditional smart locks, the present invention is more adaptable to complex application scenarios and ensures safe unlocking under special circumstances. 3. Safety and accuracy By integrating a face recognition module with object feature recognition technology on the PCB board and cooperating with a camera module, the security of the lock is effectively improved. Traditional mechanical locks and password locks are susceptible to human damage, key loss or password leakage, while object feature recognition technology can ensure that only authorized personnel can perform unlocking operations, thereby greatly reducing the risk of illegal intrusion; 4. Remote management and real-time monitoring By integrating the communication module on the PCB board, the system administrator can monitor the status of the lock in real time through the server platform and perform remote unlocking and closing operations. This remote control greatly improves management efficiency and reduces the need for on-site maintenance and human intervention. It is particularly suitable for unmanned or widely distributed distribution station environments; 5. Rapid response alarm system By integrating the monitoring module on the PCB board, when abnormal activities are detected in the lock (such as unauthorized movement, forced unlocking, etc.), the alarm information will be automatically uploaded to the server platform to notify relevant personnel to deal with the problem in time. It can quickly feedback when illegal operations occur to ensure the safety of equipment and sites; 6. Data Recording and Traceability Each unlocking and closing operation will generate detailed records through the monitoring module and upload them to the server platform in real time through the communication module. This data traceability feature can provide an important basis for subsequent auditing, management and maintenance, and enhance the transparency of lock management. Compared with the limitations of traditional locks that have no or only simple log records, the traceability of the present invention greatly improves the level of refinement of equipment management; 7. Improve management efficiency and reduce operation and maintenance costs Through the server remote management platform and real-time monitoring, the present invention can reduce on-site manual intervention, reduce the frequency and cost of personnel inspections, and at the same time, the intelligent management method shortens the response time, improves the operating efficiency and management level of the equipment, and ultimately reduces the overall operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0018] Figure 1 A schematic diagram of the cooperation between a magnetic screen cabinet door lock and a screen cabinet based on the Internet of Things and object feature recognition provided by an exemplary embodiment of the present invention is shown.

[0019] Figure 2 A front structural schematic diagram of a magnetic screen cabinet door lock based on the Internet of Things and object feature recognition provided by an exemplary embodiment of the present invention is shown.

[0020] Figure 3 A schematic diagram of the rear structure of a magnetic screen cabinet door lock based on the Internet of Things and object feature recognition provided by an exemplary embodiment of the present invention is shown.

[0021] Figure 4 A schematic diagram of the internal structure of a magnetic screen cabinet door lock based on the Internet of Things and object feature recognition provided by an exemplary embodiment of the present invention is shown.

[0022] Figure 5 A schematic structural diagram of a motor mounting base of a magnetic screen cabinet door lock based on the Internet of Things and object feature recognition provided by an exemplary embodiment of the present invention is shown.

[0023] Figure 6 A schematic diagram showing the coordination of a motor mounting base, a motor, a lock tongue, and a mechanical lock core of a magnetic screen cabinet door lock based on the Internet of Things and object feature recognition provided by an exemplary embodiment of the present invention.

[0024] Figure 7 A structural block diagram of a PCB board of a magnetic screen cabinet door lock based on the Internet of Things and object feature recognition provided by an exemplary embodiment of the present invention is shown.

[0025] Figure 8 A flowchart of a multi-mode unlocking method provided by an exemplary embodiment of the present invention is shown.

[0026] In the figure: 1. Screen cabinet; 11. Cabinet door; 12. Cabinet frame; 2. Magnetic screen cabinet door lock based on the Internet of Things and object feature recognition; 21. Lock body; 211. Motor mounting seat; 2111. First hole position; 2112. Second hole position; 212. Motor; 213. Motor gear; 214. Lock tongue; 2141. Gear part; 2142. Sleeve part; 215. Mechanical lock core; 216. PCB board; 217. Camera module; 218. Lock body magnet; 219. Battery; 22. Lock; 221. Lock magnet. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Among them, the same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings of the specification of the present invention, and the words "bottom surface" and "top surface", "inside" and "outside" refer to the direction towards or away from a specific component, respectively. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the specification of the present invention, the meaning of "multiple" is two or more.

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] Figure 1 A schematic diagram of the cooperation between a magnetic screen cabinet door lock based on the Internet of Things and object feature recognition and a screen cabinet provided by an exemplary embodiment of the present invention is shown. The magnetic screen cabinet door lock 2 based on the Internet of Things and object feature recognition is magnetically connected to the screen cabinet 1. The magnetic screen cabinet door lock 2 based on the Internet of Things and object feature recognition includes: a lock body 21 magnetically connected to the cabinet door 11 of the screen cabinet 1, and a lock buckle 22 magnetically connected to the cabinet frame 12 of the screen cabinet 1.

[0031] In the embodiment of the present application, such a design not only ensures that the door lock can be quickly and conveniently installed on the existing screen cabinet, but also because of the use of magnetic suction, it can be easily disassembled or repositioned without the use of tools, thereby increasing the flexibility of use.

[0032] For more information, see Figures 2 to 6 A motor mounting seat 211 is provided inside the lock body 21, and a motor 212 is installed in the first hole 2111 of the motor mounting seat 211. A motor gear 213 is sleeved on the power output end of the motor 212, and the motor gear 213 is meshed with the gear portion 2141 of the lock tongue 214. A mechanical lock core 215 is sleeved in the sleeve portion 2142 of the lock tongue 214. The first end of the mechanical lock core 215 is located in the mechanical lock hole 216 on the front side of the lock body 21, and the second end of the mechanical lock core 215 is rotatably connected to the second hole 2112 of the motor mounting seat 211; the lock buckle 22 is magnetically connected to the cabinet frame 12 of the screen cabinet 1, and it is buckled with the lock tongue 214. The lock body 21 also includes a PCB board 216, which is connected to the motor 212 and a camera module 217 on the front side of the lock body 21. A plurality of lock body magnets 218 are installed in the lock body 21, and a plurality of lock buckle magnets 221 are installed in the lock buckle 22.

[0033] It can be understood that the lock body 21 also includes a battery 219 for power supply, and the battery 219 is connected to the motor 212, the camera module 217, and the PCB board 216. In one example, the battery 219 is a rechargeable lithium battery.

[0034] In one example, the number of the lock body magnets 218 is four and they are evenly spaced apart.

[0035] In one example, the number of locking magnets 221 is two and they are symmetrically distributed.

[0036] As a supplementary explanation, opposite sides of the lock body 21 and the lock buckle 22 are provided with buckle holes for the lock tongue 214 to rotate through.

[0037] In the embodiment of the present application, the motor gear 213 is meshed with the gear portion 2141 on the lock tongue 214, so that when the motor rotates, the lock tongue 214 can be driven to move through the gear transmission, thereby realizing the action of unlocking or locking. One end of the mechanical lock core is located in the mechanical lock hole 216 on the front side of the lock body 21, and the other end is rotatably connected to the second hole 2112 of the motor mounting seat 211, which means that even in the case of power supply problems, the user can manually open or close the lock by operating the mechanical lock core with a traditional key, which increases the convenience and safety of use. In order to ensure good magnetic connection performance, a plurality of lock body magnets 218 are installed inside the lock body 21, and a corresponding lock buckle magnet 221 is also provided inside the lock buckle 22 to ensure that the two can be stably adsorbed together, and the lock buckle 22 can be magnetically connected to the cabinet frame 12 of the screen cabinet 1 and buckled with the lock tongue 214 to form a complete locking system.

[0038] Further, Figure 7 A structural block diagram of a PCB board of a magnetic screen cabinet door lock based on the Internet of Things and object feature recognition provided by an exemplary embodiment of the present invention is shown, and the PCB board 216 is integrated with a control module connected to the motor 212, a power module connected to the battery 219, a face recognition module connected to the camera module 217, a communication module connected to the server, a Bluetooth module connected to the mobile terminal, a monitoring module for detecting the status information of the lock body 21, and a buzzer for emitting a prompt sound or a warning sound; wherein the mobile terminal is connected to the server for communication, and the mobile terminal is a mobile phone or a tablet.

[0039] In the embodiment of the present application, the PCB board 216 plays the role of the core control unit, which integrates multiple key modules to achieve comprehensive functions. Specifically, the control module integrated on the PCB board is responsible for managing the operation of the motor 212 to ensure that the action of the lock tongue is accurate; the power module is connected to the battery 219 to provide stable and reliable power support for the entire system. The face recognition module is connected to the camera module 217, which can capture and analyze the facial features of the approaching person as one of the bases for unlocking, which enhances security and improves user experience. The communication module allows the device to establish a connection with the remote server through the network, so that the administrator can monitor the status of the door lock anytime and anywhere and receive notifications of abnormal situations. The presence of the Bluetooth module allows mobile terminals such as mobile phones or tablets to directly communicate with the door lock over a short distance, making it convenient for users to perform operations such as unlocking and setting. The monitoring module is used to continuously track various status information of the lock body 21. For example, when abnormal activities (such as unauthorized movement, forced unlocking, etc.) are detected in the lock, the alarm information will be automatically uploaded to the server platform, and the relevant personnel will be notified in time to deal with the problem. It can quickly feedback when illegal operations occur to ensure the safety of equipment and venues. Moreover, each unlocking and closing operation will generate detailed records through the monitoring module and upload them to the server platform in real time through the communication module. This data traceability feature can provide an important basis for subsequent auditing, management and maintenance, and enhance the transparency of lock management. In addition, the role of the buzzer is to issue a prompt or warning sound when necessary to remind users of specific events, such as successful unlocking, low battery or potential security threats.

[0040] In a specific embodiment, the control module is the STM32F407VGT6 in the STM32 series of STMicroelectronics. The power module is the BQ24210 of Texas Instruments (TI). The face recognition module is the Ambarella CV22. The Bluetooth module is the nRF52832 of Nordic Semiconductor. The monitoring module is the Honeywell SS495A-500K. The buzzer is the PKM10A1001R0 of Murata Manufacturing. The communication module is the Quectel RM500Q-GL, which is a 5G NR / LTE-A / UMTS / HSPA+ wireless communication module that supports diversity reception.

[0041] Next, the working principle of a magnetic screen cabinet door lock based on the Internet of Things and object feature recognition involved in an embodiment of the present invention is explained.

[0042] When the communication module or Bluetooth module of the PCB board receives the locking signal, the control module integrated thereon interprets the instruction and sends the corresponding drive signal to the motor. The motor then starts to rotate counterclockwise, which is transmitted to the lock tongue by the motor gear, prompting the lock tongue to move counterclockwise along a predetermined arc trajectory. During this process, the lock tongue gradually approaches and finally inserts into the lock buckle, completing the physical closure action. In order to ensure that the lock buckle is firmly fixed, the lock tongue continues to rotate a short distance in the same direction after fully entering the lock buckle until its end re-extends into the lock body, forming a closed loop, thereby effectively preventing the lock buckle from accidentally falling off due to external force.

[0043] At the same time, the monitoring module on the PCB board monitors the status information of the lock body in real time. When abnormal activities are detected in the lock (such as unauthorized movement, forced unlocking, etc.), the alarm information will be automatically uploaded to the server platform, and relevant personnel will be notified in time to deal with the problem. It can quickly feedback when illegal operations occur to ensure the safety of equipment and sites. In addition, each unlocking and closing operation will generate detailed records through the monitoring module and upload them to the server platform in real time through the communication module. This data traceability feature can provide an important basis for subsequent auditing, management and maintenance, and enhance the transparency of lock management.

[0044] When unlocking is required, the above process is carried out in the reverse order: when the communication module or Bluetooth module of the PCB board receives the unlocking signal, the control module integrated thereon parses the instruction and sends the corresponding drive signal to the motor. The direction of the reverse motor rotates clockwise, which in turn drives the lock tongue to move clockwise, so that it withdraws from the lock and returns to its initial position, allowing the cabinet door to be opened freely. During the whole process, the Bluetooth module supports wireless connection within a short distance, allowing users to easily control the door lock through devices such as smartphones; and the face recognition module combined with the camera module can identify the facial features of authorized users, providing a safer and more convenient keyless entry method.

[0045] It is worth mentioning that Figure 8 A flowchart of a multi-mode unlocking method provided by an exemplary embodiment of the present invention is shown. The method is applied to the magnetic screen cabinet door lock based on the Internet of Things and object feature recognition. The method includes: Step 801, remote authorized unlocking: a remote unlocking command is initiated through the server, which is limited to the execution of the authorized administrator under the role authority management; the unlocking command is pushed to the communication module of the PCB board in real time via the MQTT protocol, and the communication module performs the unlocking operation through the control module after receiving the command; Step 802, object feature recognition unlocking: local identity authentication is performed using a face recognition module in combination with a camera module. The face recognition module uses the OpenCV open source library to process images and match features. When the biometric features are consistent with a pre-stored template, unlocking is completed; Step 803, emergency mechanical unlocking: When the magnetic screen cabinet door lock fails or the battery is low, the traditional key is matched and inserted into the mechanical lock cylinder to unlock it, ensuring that it can be safely opened when the magnetic screen cabinet door lock system fails.

[0046] Preferably, the method further comprises: Step 804, intelligently switch the unlocking mode: give priority to object feature recognition unlocking, and switch to remote authorization unlocking when object feature recognition unlocking fails; when object feature recognition unlocking and remote authorization unlocking fail, enable emergency mechanical unlocking.

[0047] To sum up, the present invention adopts a magnetic structure design, which is highly portable and suitable for temporary locking needs. Compared with traditional fixed locks, the magnetic design of the present invention does not require complicated installation tools or operations, can quickly complete installation and disassembly, and reduce construction time and manpower investment. It is particularly suitable for occasions that require flexible deployment; and supports multiple unlocking methods, including object feature recognition unlocking, server remote platform authorization unlocking, mobile phone App or small program unlocking, emergency mechanical unlocking, etc., which greatly improves the flexibility of use. Compared with the single unlocking method of traditional smart locks, the present invention is more adaptable to complex application scenarios and ensures safe unlocking under special circumstances.

[0048] In the embodiments disclosed in the present invention, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments disclosed in the present invention can be understood according to specific circumstances.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A magnetic screen cabinet door lock based on the Internet of Things and object feature recognition, which is magnetically connected to a screen cabinet (1), characterized in that: The magnetic screen cabinet door lock (2) based on the Internet of Things and object feature recognition comprises: A lock body (21) is magnetically connected to the cabinet door (11) of the screen cabinet (1), a motor mounting seat (211) is arranged inside the lock body, a motor (212) is installed in a first hole (2111) of the motor mounting seat (211), a motor gear (213) is sleeved on the power output end of the motor (212), the motor gear (213) is meshed with a gear portion (2141) of a lock tongue (214), a mechanical lock core (215) is sleeved in a sleeve portion (2142) of the lock tongue (214), a first end of the mechanical lock core (215) is located in a mechanical lock hole (216) on the front side of the lock body (21), and a second end of the mechanical lock core (215) is rotatably connected to a second hole (2112) of the motor mounting seat (211); and A lock buckle (22) which is magnetically connected to the cabinet frame (12) of the screen cabinet (1) and is buckled with the lock tongue (214); The lock body (21) further comprises a PCB board (216), the PCB board (216) is connected to the motor (212) and a camera module (217) on the front side of the lock body (21), a plurality of lock body magnets (218) are installed in the lock body (21), and a plurality of lock buckle magnets (221) are installed in the lock buckle (22).

2. The magnetic screen cabinet door lock based on the Internet of Things and object feature recognition according to claim 1 is characterized in that: The lock body (21) also includes a battery (219), and the battery (219) is connected to the motor (212), the camera module (217), and the PCB board (216).

3. The magnetic screen cabinet door lock based on Internet of Things and object feature recognition according to claim 2 is characterized in that: A control module connected to the motor (212) and a power module connected to the battery (219) are integrated on the PCB board (216).

4. The magnetic screen cabinet door lock based on Internet of Things and object feature recognition according to claim 3 is characterized in that: The PCB board (216) is also integrated with a face recognition module connected to the camera module (217).

5. The magnetic screen cabinet door lock based on Internet of Things and object feature recognition according to claim 4 is characterized in that: The PCB board (216) is also integrated with a communication module connected to the server and a Bluetooth module connected to the mobile terminal.

6. The magnetic screen cabinet door lock based on Internet of Things and object feature recognition according to claim 5 is characterized in that: The PCB board (216) is also integrated with a monitoring module for detecting status information of the lock body (21).

7. The magnetic screen cabinet door lock based on Internet of Things and object feature recognition according to claim 6 is characterized in that: The PCB board (216) is also integrated with a buzzer for emitting a prompt sound or a warning sound.

8. The magnetic screen cabinet door lock based on Internet of Things and object feature recognition according to claim 7 is characterized in that: The mobile terminal is a mobile phone or a tablet.

9. A multi-mode unlocking method, the method is applied to the magnetic screen cabinet door lock based on Internet of Things and object feature recognition as claimed in claim 8, characterized in that: The method comprises: Remote authorized unlocking: remote unlocking commands are initiated through the server, which are limited to authorized administrators under role authority management; the unlocking commands are pushed to the communication module of the PCB board in real time via the MQTT protocol, and the communication module performs the unlocking operation through the control module after receiving the commands; Object feature recognition unlocking: local identity authentication is performed using the face recognition module in combination with the camera module. The face recognition module uses the OpenCV open source library to process images and match features. When the biometric features are consistent with the pre-stored template, unlocking is completed; Emergency mechanical unlocking: When the magnetic screen cabinet door lock fails or the battery is low on power, the traditional key is inserted into the mechanical lock core to unlock it, ensuring that it can be opened safely even when the magnetic screen cabinet door lock system fails.

10. The multi-mode unlocking method according to claim 9, characterized in that: The method further comprises: Intelligent switching unlocking mode: object feature recognition unlocking is prioritized, and when the object feature recognition unlocking fails, it is switched to the remote authorization unlocking; when the object feature recognition unlocking and the remote authorization unlocking fail, the emergency mechanical unlocking is enabled.

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