Multifunctional wireless building intercom system

Abstract

The utility model discloses a multifunctional wireless building intercom system, which comprises an outdoor wireless digital host, a plurality of wireless repeaters and wireless indoor extensions. The all-wireless ad hoc network is constructed by adopting a Mesh protocol, a distributed mesh topology structure is formed, redundancy is provided, and the reliability and expansibility of the network are enhanced; moreover, the nodes of the Mesh ad hoc network can automatically select the optimal path to transmit data, even if the signal of a single node is weak, other nodes with strong signals can be selected, and the fault of the single node does not affect the global communication, so that the reliability is improved. And meanwhile, plug-and-play extension is supported, a newly added extension is automatically integrated into a network, manual configuration is not needed, the later maintenance cost is remarkably reduced, and the method is particularly suitable for the staged transformation requirement of old cells.

Description

Technical Field

[0001] This utility model relates to the field of intercom technology, specifically to a multifunctional wireless building intercom system. Background Technology

[0002] Building intercom systems are used for communication between visitors and residents. Traditional solutions rely on wired cabling or common wireless technologies (such as WiFi and Bluetooth). Existing mesh networks (such as ZigBee) suffer from insufficient bandwidth, making it difficult to support high-definition audio and video transmission. Furthermore, traditional wired systems require extensive cabling, resulting in high construction costs and difficulties in retrofitting older residential areas. In addition, common WiFi and Bluetooth have limited coverage and weak wall penetration, failing to meet the needs of high-rise buildings. Wireless signals are also susceptible to building structure and electromagnetic interference, leading to unstable communication.

[0003] Chinese Patent Publication No. CN108924492A discloses a smart video access control intercom system based on a WIFI networking mode. This system utilizes a cloud management server and a switch, eliminating the need for cabling. It solves the problem of traditional digital video access control intercom systems relying on wired Ethernet networks, requiring wired network access for each unit's door station installation point, resulting in high cabling costs. However, the cloud management server approach typically requires payment to a third-party operator, and because it involves third-party management, it is prone to data leaks.

[0004] Chinese Patent Publication No. CN205921681U discloses an upgrade architecture for an old residential building intercom system based on wireless technology. The unit door station is wired to a signal conversion device; the wireless signal repeater is wirelessly connected to the signal conversion device. A small wireless local area network is formed between the signal conversion device, the wireless signal repeater, and the indoor wireless intercom terminal. This network, along with the unit door station and indoor units, creates a new networking method. This method allows indoor units without malfunctions to use the traditional wired intercom method, while malfunctioning indoor units can use the wireless intercom method (i.e., replacing malfunctioning indoor units with wirelessly compatible ones, while non-malfunctioning units do not require replacement). This allows for improvements based on the existing system resources, enabling the restoration of intercom functionality. In the aforementioned intercom system, if the unit door station and some indoor units malfunction, the wireless paging device, indoor wireless intercom terminal, and wireless signal repeater are all wirelessly connected via Wi-Fi modules to form a wireless intercom network. However, if there are many malfunctioning indoor units, installing a Wi-Fi module on each one would require high hardware costs. Furthermore, the indoor environment has dense Wi-Fi signals (such as routers and smart home devices), and if the extension units enable Wi-Fi, it may exacerbate channel contention, thus affecting communication stability. In addition, traditional Wi-Fi networking typically uses a "star topology," where all devices are connected through a single access point (AP). When an extension unit or repeater fails, the device needs to be manually replaced and the network reconfigured, resulting in high maintenance costs.

[0005] Therefore, overcoming the aforementioned shortcomings has become an important issue that urgently needs to be addressed by those skilled in the art. Utility Model Content

[0006] This utility model overcomes the shortcomings of the above-mentioned technologies and provides a configuration method and control method for intelligent devices.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This utility model discloses a multifunctional wireless building intercom system.

[0009] A multi-functional wireless building intercom system includes:

[0010] An outdoor wireless digital host 100 is installed at the entrance of each building unit and includes a first ESP wireless module 101, a first WiFi module 102, and a main control CPU module 103; the first ESP wireless module 101 and the first WiFi module 102 are respectively interconnected with the main control CPU module 103.

[0011] Multiple wireless repeaters 200 are deployed in the stairwell, each including a second ESP wireless module 201 and a second WiFi module 202;

[0012] Multiple wireless indoor units 300 are installed in the resident's room, each including a third ESP wireless module 301;

[0013] Both the first WiFi module 102 and the second WiFi module 202 are used to connect to the Internet;

[0014] The first ESP wireless module 101, the second ESP wireless module 201, and the third ESP wireless module 301 are all wireless communication modules that support the Mesh protocol; the outdoor wireless digital host 100, multiple wireless repeaters 200, and multiple wireless indoor units 300 are wirelessly connected through their respective ESP wireless modules and form a wireless local area network.

[0015] Preferably, the outdoor wireless digital host 100 further includes: a memory 104, a first audio input module 105, a first audio output module 106, a flash memory 107, a first digital-to-analog and analog-to-digital conversion module 108, a lock control module 109, an LCD screen 110, a numeric keypad 111, and a first power supply module 112 for supplying power to each module of the outdoor wireless digital host 100. The main control CPU module 103 is also interactively connected to the memory 104, the flash memory 107, the first digital-to-analog and analog-to-digital conversion module 108, the lock control module 109, the LCD screen 110, and the numeric keypad 111.

[0016] The first ESP wireless module 101 sends voice signal data packets to the wireless indoor unit 300 or receives intercom signals from the wireless indoor unit 300 through multiple wireless repeaters 200; the first digital-to-analog and analog-to-digital conversion module 108 is electrically connected to the first audio input module 105 and the first audio output module 106 respectively; the lock control module 109 is used to receive unlocking commands sent by the main control CPU module 103 to unlock and lock.

[0017] Preferably, each wireless repeater 200 further includes: a dynamic IP connection module 203 responsible for the dynamic allocation of IP addresses and a second power supply module 204 for supplying power to each module of the repeater; wherein, the dynamic IP connection module 203 includes:

[0018] The processor chip 2031, which supports the DHCP protocol, is connected to the second ESP wireless module 201 and is used to initiate the DHCP protocol when a new wireless indoor extension 300 is detected to be connected.

[0019] IP address memory 2032, which is connected to processor chip 2031, is used to store a pool of allocable IP addresses;

[0020] The network interface controller 2033 is used to communicate with the upper-level node via Ethernet.

[0021] Preferably, the wireless repeater 200 is deployed at a spacing of one unit per three floors.

[0022] Preferably, each wireless indoor unit 300 further includes: a second audio input module 302, a second audio output module 303, a second digital-to-analog and analog-to-digital conversion module 304, a button module 305, and a third power supply module 306 for supplying power to each module of the wireless indoor unit 300; the third ESP wireless module 301 sends intercom signals to the outdoor wireless digital host 100 or receives voice signal data packets from the wireless indoor unit 300 through multiple wireless repeaters 200;

[0023] The second digital-to-analog and analog-to-digital conversion module 304 is electrically connected to the second audio input module 302 and the second audio output module 303, respectively.

[0024] Preferably, the outdoor wireless digital host 100 further includes an Ethernet communication module 113 connected to the main control CPU module 103, which is used to communicate with the outdoor wireless digital hosts 100 of other buildings or with the property management center.

[0025] Preferably, the outdoor wireless digital host 100 further includes: a camera module 114, a face recognition module 115, and an NFC module 116 connected to the main control CPU module 103.

[0026] Preferably, the face recognition module 115 includes:

[0027] Binocular infrared camera 1151, used for liveness detection and 3D modeling;

[0028] The structured light projector 1152 employs a VCSEL array for 3D perception and motion capture.

[0029] The liveness detection unit uses a photoplethysmography (PPG) sensor to monitor and analyze microvascular activity.

[0030] Preferably, the outdoor wireless digital host 100 further includes:

[0031] The fingerprint recognition module 117 is connected to the main control CPU module 103 and is used to collect and verify visitor fingerprint information.

[0032] Preferably, the outdoor wireless digital host 100 further includes:

[0033] The IC / ID card identification module 118 is connected to the main control CPU module 103 and is used to identify the IC card or ID card held by the user and verify whether the user's identity is legitimate.

[0034] Compared with the prior art, the embodiments of this utility model have the following beneficial effects:

[0035] 1. This project utilizes the Mesh protocol to construct a fully wireless self-organizing network, forming a distributed mesh topology that provides redundancy and enhances network reliability and scalability. Furthermore, nodes in the Mesh self-organizing network can automatically select the optimal path for data transmission; even if a single node has a weak signal, it will choose another node with a stronger signal. A single point of failure does not affect global communication, improving reliability. It also supports plug-and-play expansion, with newly added extensions automatically integrating into the network without manual configuration, significantly reducing later maintenance costs. This makes it particularly suitable for the phased renovation needs of older residential communities.

[0036] 2. The intercom system in this case supports dual-mode expansion of Ethernet + WiFi. The outdoor unit and wireless repeater integrate WiFi modules, which can access the cloud or local area network to realize remote configuration, firmware upgrades and smart home linkage, avoiding competition with indoor WiFi devices and balancing scalability and stability. At the same time, the wireless indoor unit does not have a WiFi module, reducing operation and maintenance costs.

[0037] 3. This case employs multimodal biometric technology (face recognition + fingerprint + NFC + IC / ID card recognition). The face recognition module integrates a binocular infrared camera, a structured light projector, and a liveness detection unit to build three-dimensional spatial perception capabilities, accurately distinguishing real faces from photo / video attacks. Combined with fingerprint uniqueness verification, the security level is significantly improved, effectively resisting the risk of identity forgery. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the architecture of the wireless building intercom system in this case.

[0040] Figure 2 This is a structural block diagram of a single outdoor wireless digital host in this case.

[0041] Figure 3 This is a block diagram of a single wireless repeater in this case.

[0042] Figure 4This is a structural block diagram of a single wireless indoor unit in this case.

[0043] Figure 5 This is a structural block diagram of the facial recognition module in this case. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] It should be noted that the terms "first," "second," "third," "fourth," etc., in the specification and claims of this utility model are used to distinguish different objects, not to describe a specific order. The terms "comprising" and "having," and any variations thereof, in embodiments of this utility model are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0046] like Figures 1-4 As shown, a multifunctional wireless building intercom system includes: an outdoor wireless digital host 100, multiple wireless repeaters 200 and multiple wireless indoor units 300, which are wirelessly connected through their respective ESP wireless modules and form a wireless local area network.

[0047] The outdoor wireless digital host 100 is fixedly installed on the outside of the entrance door frame of the building unit. It integrates a first ESP wireless module 101, a first WiFi module 102, a main control CPU module 103, a memory 104, a first audio input module 105, a first audio output module 106, a Flash memory 107, a first digital-to-analog and analog-to-digital conversion module 108, a lock control module 109, an Ethernet communication module 113, and a first power supply module 112 that supplies power to each module of the outdoor wireless digital host 100. The memory module 104 is connected to the main control CPU module 101 via a DDR4 interface for caching audio and video data; the flash memory 107 is connected to the main control CPU module 103 via an eMMC bus for storing firmware programs; the first audio input module 105 is used to input voice signals, specifically including via an audio input interface and a microphone; the first audio output module 106 is used to output voice signals, specifically including via an audio output interface and a speaker; the first digital-to-analog and analog-to-digital conversion module 108 is connected to the first audio input module 105 and the first audio output module 106 respectively, for realizing the conversion between analog voice signals and digital signals; the Ethernet communication module 113 is connected to the main control CPU module 101 via an RJ45 interface for communicating with outdoor wireless hosts in other buildings or the cloud; the lock control module 109 is connected to the main control CPU module 101 via its internal relay for receiving unlocking commands and controlling the opening and closing of the electromagnetic lock. The outdoor wireless digital host 100 also includes an LCD screen 110 and a numeric keypad 111, both of which are connected to the main control CPU module 103, facilitating user viewing and operation of the buttons for intercom. In specific implementation, the first ESP wireless module 101 sends voice signal data packets to the wireless indoor unit 300 or receives intercom signals from the wireless indoor unit 300 through multiple wireless repeaters 200.

[0048] Multiple wireless repeaters 200 are fixed to the wall of the stairwell, with one wireless repeater 200 installed every three floors. Each wireless repeater 200 includes:

[0049] The second ESP wireless module 201: supports the ESP-WIFI-MESH protocol and is responsible for Mesh network communication.

[0050] The second WiFi module 202 is used to connect to the Internet. It can be used as an extension function to directly connect to existing WiFi devices such as mobile phones and tablets, providing flexible access for users. It can also connect to external cloud platforms or monitoring equipment. At the same time, the second WiFi module 202 can access the external network in a unified manner with the first WiFi module 103, which facilitates the implementation of security measures such as firewalls and data encryption, and avoids the risk of the extension unit being directly exposed to the public network.

[0051] Dynamic IP Connection Module 203: Responsible for the dynamic allocation of IP addresses.

[0052] Second power supply module 204: supplies power to each module of the repeater.

[0053] The dynamic IP connection module 203 includes:

[0054] The processor chip 2031 (such as model W7500P) that supports the DHCP protocol is connected to the second ESP wireless module 201 and is used to initiate the DHCP protocol when a new wireless indoor extension 300 is detected to be connected.

[0055] The IP address memory 2032 is connected to the processor chip 2031 via the I2C bus and is used to store the pool of allocable IP addresses (such as 192.168.1.100~200); specifically, an EEPROM chip can be used, such as the AT24C256 chip.

[0056] The network interface controller 2033 is used to communicate with the upstream node via Ethernet. Specifically, the network interface controller 2033 can use a LAN8720A PHY chip. It is dedicated to handling Ethernet communication with the host 100, including extension information synchronization and status reporting. Thus, through the configuration of the dynamic IP connection module 203, new wireless indoor extensions can be plugged and played, and IP addresses are automatically assigned to them without manual configuration, reducing maintenance costs.

[0057] In practice, since the third ESP wireless module (301) has a built-in Mesh protocol stack, it automatically starts scanning mode after power-on. The third ESP wireless module (301) initializes, scans the broadcast signals of the surrounding repeaters 200, selects the node with the strongest RSSI and the best network layer as the parent node; completes identity authentication through WPA3 encryption, and sends a registration request to the parent node (wireless repeater). The network interface controller of the parent node's dynamic IP connection module (203) synchronizes the extension information to the memory (14) of the outdoor wireless digital host 100 to complete the binding. In this way, the dynamic IP connection module (203) assigns a unique IP address to the wireless repeater 200 and the connected sub-devices through the second ESP wireless module (201). The wireless indoor extension 300 is used to bind to the resident's room and automatically join the Mesh network after power-on.

[0058] The specific workflow for accessing the new wireless indoor unit is as follows:

[0059] The third ESP wireless module (301) of the indoor wireless unit scans the Mesh network, selects a parent node (wireless repeater), and completes WPA3 authentication. The second ESP module (201) of the parent node records the MAC address of the unit and triggers the dynamic IP connection module to start the DHCP process by sending a "new device access" command. The processor chip (2031) queries the available IP pool (192.168.1.100~200) from the IP address memory and generates a DHCPOFFER. The second ESP module 201 encapsulates the DHCPOFFER into a Mesh protocol frame and sends it to the unit via the wireless link. After accepting the configuration, the unit sends a "configuration complete" confirmation frame through the Mesh network. The second ESP module 201 of the parent node sends the unit's IP / MAC information to the dynamic IP connection module 203. The network interface controller 2033 encapsulates the synchronization data according to the TCP / IP protocol and sends it to the outdoor wireless digital host 100 memory 14 via Ethernet to achieve consistent status across the entire network.

[0060] Each wireless indoor extension unit (300 units) includes:

[0061] The system comprises a third ESP wireless module 301, a second audio input module 302, a second audio output module 303, a second digital-to-analog and analog-to-digital conversion module 304, a button module 305, and a third power supply module 306 that supplies power to each module of the wireless indoor unit 300. The third ESP wireless module 301 receives voice signal data packets from the outdoor wireless digital host 100 via the wireless repeater 200 or sends intercom signals to the outdoor wireless digital host 100 via the wireless repeater 200.

[0062] The second digital-to-analog and analog-to-digital conversion module 304 is electrically connected to the second audio output module 303, and outputs the voice signal after digital-to-analog conversion through the speaker (such as a loudspeaker) of the second audio output module 303. The second digital-to-analog and analog-to-digital conversion module 304 is also electrically connected to the second audio input module 302, and is used to perform analog-to-digital conversion on the intercom audio signal received from the microphone of the second audio input module 302 and send it to the outdoor wireless digital host 100. In specific implementations, the ESP wireless module can also be called an ESP module; each ESP wireless module can also use the ESP32 series chip launched by Espressif Systems, which supports MESH networking, such as the ESP32-S2 or ESP32-C6, etc.

[0063] The intercom system in this case works as follows:

[0064] The outdoor wireless digital host 100, multiple wireless repeaters 200, and multiple wireless indoor units 300 in this system are each equipped with an ESP wireless module and construct a self-organizing multi-hop wireless network (MESH network) based on the ESP-WIFI-MESH protocol. The wireless repeater 200, as a node, prioritizes the path with strong signal (high RSSI) and few hops to transmit data. The wireless indoor unit 300 automatically joins the network after completing WPA3 encryption authentication by scanning the optimal parent node (wireless repeater), and its authentication information is synchronized to the host 100 to achieve full network binding.

[0065] In the audio and video transmission process, when a visitor presses a number key on the outdoor wireless digital host, the first audio input module (such as a microphone) collects the voice signal. The first digital-to-analog and analog-to-digital conversion module 108 converts the analog voice signal into a digital signal. The digital voice signal is processed and compressed into a voice signal data packet by the main control CPU module, and transmitted to the target wireless indoor unit through the MESH network composed of the first ESP wireless modules 101. After the resident in the corresponding room answers the call, it is output through the second audio output module. When the resident presses a key on the key module, a reverse call signal is triggered. The second audio input module receives the call signal and converts the received digital call signal into an analog call signal through the second digital-to-analog and analog-to-digital conversion module. This signal is then forwarded through the Mesh network (i.e., a self-organizing multi-hop wireless network) to the wireless repeater and then to the outdoor wireless digital host. The entire process is supported by real-time data caching in the memory, supporting multi-channel concurrency. Moreover, when the resident presses the unlock button on the wireless indoor unit, the unlock command is also sent to the main control CPU module of the outdoor wireless digital host through the Mesh network, thereby controlling the electromagnetic lock to unlock.

[0066] Furthermore, the system's scalability is achieved through Ethernet communication modules, enabling interconnection across buildings or with the cloud. The first WiFi module of the outdoor wireless digital host and the second WiFi module of the wireless repeater support internet access, providing remote firmware upgrades and smart home integration capabilities for the indoor wireless units, forming an efficient, secure, and scalable wireless building intercom solution. The Ethernet module can communicate with outdoor hosts in other buildings or with the property management center via TCP / IP protocol, and can also connect to the network interface controller of the wireless repeater.

[0067] As described above, the intercom system in this case is equipped with ESP wireless modules supporting the Mesh protocol on the outdoor wireless digital host 100, multiple wireless repeaters 200, and multiple wireless indoor units 300, forming a fully wireless MESH self-organizing network and a distributed wireless local area network. Compared with the traditional WiFi networking method, the Mesh self-organizing network in this case adopts a mesh topology, forming multi-hop transmission paths, providing redundancy, and enhancing network reliability and scalability. Moreover, the nodes of the Mesh self-organizing network can automatically select the best path to transmit data. Even if the signal of a single node is weak, it will choose other nodes with stronger signals. A single point of failure will not affect global communication, improving reliability. The MESH network supports multi-level repeaters, adapts to complex building structures, and can be plugged and played automatically when additional wireless indoor units are needed, improving expansion flexibility. Meanwhile, this project includes WiFi modules on the outdoor wireless digital host 100 and multiple wireless repeaters 200, allowing them to connect to the internet or local area network as extension modules for remote management (such as firmware upgrades and device status monitoring via a cloud platform) or direct connection to existing WiFi devices (such as mobile phones and tablets), providing flexible access for users. Furthermore, considering the limited costs during renovations of older communities, and the large number of extension units, integrating a WiFi module into each would significantly increase hardware costs (WiFi chips are typically 2-3 times more expensive than ESP wireless modules). Moreover, the primary functional requirement of indoor extension units is real-time voice communication with the outdoor host / wireless repeaters, which the ESP wireless module fully meets. Therefore, this project's indoor wireless extension unit 300, equipped with an ESP wireless module but without a WiFi module, ensures intercom signal transmission while reducing costs and power consumption (WiFi modules have high standby power consumption, approximately 50-100mW; while the ESP wireless module's power consumption in sleep mode can be as low as below 10μW, making it more suitable for long-term indoor unit operation). At the same time, because no WiFi module is installed for signal transmission, there is no channel competition with other WiFi devices in the room, ensuring communication stability.

[0068] In summary, the intercom system in this case is based on an ESP+MWiFi dual-mode design, achieving both distributed self-organizing network (ESP) and retaining scalability (WiFi), forming an intercom system supporting the ESP-WIFI-MESH protocol. Each ESP wireless module constructs a low-latency, highly reliable dedicated MESH network to ensure core intercom functions; each WiFi module provides general network access capabilities, supports expansion functions, and can adapt to different building environments. This solves the problems of traditional building intercom systems relying on cabling and having poor scalability, while avoiding the high cost and power consumption drawbacks of all-WiFi solutions, thus overcoming the limitations of a single technology approach.

[0069] In a preferred embodiment, the outdoor wireless digital host 100 of this invention further includes: a camera module 114, a face recognition module 115, and an NFC module 116 connected to the main control CPU module 103. Thus, the camera module can be used to capture images and videos for real-time monitoring and recording. The face recognition module can be used to identify residents or visitors, improving security. The NFC module can be used for access control, enabling rapid access control, thereby cooperating with the face recognition module to achieve enhanced authentication through face recognition and NFC.

[0070] In a preferred embodiment, the face recognition module 115 includes:

[0071] The binocular infrared camera 1151 comprises two IMX307 sensors operating at a wavelength of 940nm±10nm. Combining infrared sensing and stereoscopic vision technologies, the binocular infrared camera 1151 achieves three-dimensional spatial perception capabilities. The infrared lens enables clear imaging even at night or in low-light conditions, while the dual-camera design utilizes parallax calculation to achieve depth perception, enhancing scene understanding. This facilitates the identification of differences between screen images and real faces, effectively defending against spoofing attacks using photos and videos, and improving the security of the access control intercom system in this case.

[0072] The structured light projector 1152 uses a VCSEL array; the VCSEL array is a vertical cavity surface-emitting laser, which forms a speckle pattern through 30,000 emission points. The dot density is 10 times that of ordinary LED solutions, which improves the accuracy of 3D reconstruction.

[0073] The liveness detection unit 1153 employs a photoplethysmography (PPG) sensor.

[0074] Specifically, the binocular infrared camera 1151 is connected to the main control CPU module 103 through a dual MIPI interface, and outputs a depth map with an accuracy of ≤1mm.

[0075] The photoplethysmography (PPG) sensor is connected to the main control CPU module 103 via an I2C interface. In specific implementation, the PPG sensor is used to monitor and analyze microvascular activity and, in conjunction with the binocular infrared camera, capture facial blood flow characteristics to distinguish between real faces and fake attacks.

[0076] As stated above, this case addresses the vulnerability of traditional 2D face recognition to photo or video attacks by employing a binocular infrared camera and a structured light projector. The liveness detection unit further prevents forgery and enhances security by monitoring and analyzing microvascular activity, thereby achieving multimodal biometrics and significantly improving the security of communities using this intercom system.

[0077] In a preferred embodiment, the outdoor wireless digital host 100 further includes:

[0078] The fingerprint recognition module 117, connected to the main control CPU module 103, is used to collect and verify visitor fingerprint information. Thus, by setting up the fingerprint recognition module 117 and employing biometric technology, this case effectively prevents the risk of copying / theft by verifying identity through the uniqueness of fingerprints, thereby enhancing security.

[0079] In a preferred embodiment, the outdoor wireless digital host 100 further includes:

[0080] The IC / ID card identification module 118, connected to the main control CPU module 103, is primarily used for identity authentication and information reading functions. In practice, the IC / ID card identification module can identify the IC card or ID card held by the user and verify the user's identity. Through communication with the main control CPU module, this module can transmit the identified user identity information to the main control CPU for further authorization verification and decision-making.

[0081] The above provides a detailed description of a multifunctional wireless building intercom system disclosed in the embodiments of this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A multifunctional wireless building intercom system, characterized in that, include: The outdoor wireless digital host (100) includes a first ESP wireless module (101), a first WiFi module (102), and a main control CPU module (103); the first ESP wireless module (101) and the first WiFi module (102) are respectively interconnected with the main control CPU module (103); Multiple wireless repeaters (200), each including a second ESP wireless module (201) and a second WiFi module (202); Multiple wireless indoor units (300), each including a third ESP wireless module (301); Both the first WiFi module (102) and the second WiFi module (202) are used to connect to the Internet; The first ESP wireless module (101), the second ESP wireless module (201), and the third ESP wireless module (301) are all wireless communication modules that support the Mesh protocol; the outdoor wireless digital host (100), multiple wireless repeaters (200), and multiple wireless indoor units (300) are wirelessly connected through their respective ESP wireless modules and form a wireless local area network.

2. The multifunctional wireless building intercom system according to claim 1, characterized in that, The outdoor wireless digital host (100) further includes: a memory (104), a first audio input module (105), a first audio output module (106), a flash memory (107), a first digital-to-analog and analog-to-digital conversion module (108), a lock control module (109), a liquid crystal display (110), a numeric keypad (111), and a first power supply module (112) that supplies power to each module of the outdoor wireless digital host (100). The main control CPU module (103) is also interactively connected to the memory (104), the flash memory (107), the first digital-to-analog and analog-to-digital conversion module (108), the lock control module (109), the liquid crystal display (110), and the numeric keypad (111). The first ESP wireless module (101) sends voice signal data packets to the wireless indoor unit (300) or receives intercom signals from the wireless indoor unit (300) through multiple wireless repeaters (200); The first digital-to-analog and analog-to-digital conversion module (108) is electrically connected to the first audio input module (105) and the first audio output module (106) respectively; the lock control module (109) is used to receive the unlocking command sent by the main control CPU module (103) to unlock and lock.

3. The multifunctional wireless building intercom system according to claim 1, characterized in that, Each wireless repeater (200) further includes: a dynamic IP connection module (203) responsible for the dynamic allocation of IP addresses, and a second power supply module (204) for powering each module of the repeater; wherein, the dynamic IP connection module (203) includes: A processor chip (2031) that supports the DHCP protocol is connected to a second ESP wireless module (201) for initiating the DHCP protocol when a new wireless indoor extension (300) is detected to be connected. IP address memory (2032), which is connected to processor chip (2031), is used to store a pool of allocatable IP addresses; Network interface controller (2033) is used to communicate with the upper-level node via Ethernet.

4. The multifunctional wireless building intercom system according to claim 1 or 3, characterized in that, The wireless repeater (200) is deployed at a spacing of one unit per three floors.

5. The multifunctional wireless building intercom system according to claim 1, characterized in that, Each wireless indoor unit (300) further includes: a second audio input module (302), a second audio output module (303), a second digital-to-analog and analog-to-digital conversion module (304), a button module (305), and a third power supply module (306) for powering each module of the wireless indoor unit (300); the third ESP wireless module (301) sends intercom signals to the outdoor wireless digital host (100) or receives voice signal data packets from the wireless indoor unit (300) through multiple wireless repeaters (200); The second digital-to-analog and analog-to-digital conversion module (304) is electrically connected to the second audio input module (302) and the second audio output module (303), respectively.

6. The multifunctional wireless building intercom system according to claim 1, characterized in that, The outdoor wireless digital host (100) also includes an Ethernet communication module (113) connected to the main control CPU module (103), which is used to communicate with the outdoor wireless digital hosts (100) of other buildings or with the property management center.

7. The multifunctional wireless building intercom system according to claim 6, characterized in that, The outdoor wireless digital host (100) also includes: a camera module (114), a face recognition module (115), and an NFC module (116) connected to the main control CPU module (103).

8. The multifunctional wireless building intercom system according to claim 7, characterized in that, The face recognition module (115) includes: Binocular infrared camera (1151) for liveness detection and 3D modeling; Structured light projector (1152), which employs a VCSEL array, is used for 3D perception and motion capture; The liveness detection unit (1153) uses a photoplethysmography (PPG) sensor to monitor and analyze microvascular activity.

9. The multifunctional wireless building intercom system according to claim 2, characterized in that, The outdoor wireless digital host (100) also includes: The fingerprint recognition module (117) is connected to the main control CPU module (103) and is used to collect and verify visitor fingerprint information.

10. The multifunctional wireless building intercom system according to claim 2, characterized in that, The outdoor wireless digital host (100) also includes: The IC / ID card identification module (118) is connected to the main control CPU module (103) and is used to identify the IC card or ID card held by the user and verify whether the user's identity is legitimate.

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