A fiber optic visual linkage broadcast ultra-thin digital flat panel speaker device

Abstract

This utility model relates to the field of public address technology, specifically to an ultra-thin digital flat panel loudspeaker device for optical network visual linkage broadcasting. It includes an optical network interface, a frame assembly, a surface sound source system, a signal processing module, a visual recognition component, and a cluster collaboration component. The frame assembly includes a surrounding frame integrating the optical network interface, a metal base plate, an insulating base plate, and sound-permeable metal mesh panels on both the front and back. By relying on the ring network cascading function of the network switch module to form serial broadcast terminal nodes, and combining this with the volume differentiation control of the digital power amplifier module to form directional guidance, it effectively improves the efficiency of emergency broadcasting and evacuation during disasters. Furthermore, by relying on optical cables to construct a ring network dual-link redundant network architecture, it forms a fully optical network broadcasting system, solving the problem of low connection reliability that easily occurs when traditional network cables are connected to loudspeakers, and avoiding the technical drawbacks of traditional network cables such as network interruptions caused by electromagnetic interference and high data transmission error rates, ensuring stable transmission of broadcast signals in complex environments.

Description

Technical Field

[0001] This utility model relates to the field of public broadcasting technology for subways, airports, and other similar applications, and specifically to an ultra-thin digital flat panel speaker device with optical network interface and visual linkage for broadcasting. Background Technology

[0002] In the field of broadcasting systems, traditional signal transmission methods mostly rely on cables to transmit broadcast signals to loudspeakers. Such equipment suffers from significant line loss during cable transmission, affecting the quality of audio signal transmission. Furthermore, cables themselves are expensive and have weak resistance to interference in complex environments, making them susceptible to external factors that can negatively impact broadcast performance.

[0003] Public address systems are crucial infrastructure in high-traffic public transportation hubs such as rail transit stations and airports. Currently, public address systems rely on manual operation via microphone broadcasts, playback of pre-recorded programs, or automatic playback linked to train signaling systems. This is only suitable for routine, fixed, pre-programmed scenarios such as arrival announcements. In current subway and airport construction, broadcasting and video surveillance systems operate independently. In the event of accidents, fires, passenger falls on elevators or escalators, platform congestion, or passengers approaching tracks, while existing visual cameras can capture abnormal situations in time, they cannot provide timely real-time broadcast responses. When these dangers occur, the lack of an immediate monitoring and automatic triggering broadcast linkage mechanism prevents the timely delivery of safety warnings or evacuation guidance information, easily leading to missed opportunities for emergency response.

[0004] Currently, with the development of IP network broadcasting technology, Ethernet cables are used for signal transmission in practical applications. The transmission distance needs to be extended using relay equipment such as switches. In large venues such as rail transit and airports, the distance from the control room to the loudspeakers in each zone often exceeds hundreds of meters or even reaches several kilometers, necessitating the installation of relay equipment in between. This not only increases system complexity but also raises maintenance costs. Furthermore, the network connectors for existing network cables connecting to IP loudspeakers are prone to aging, leading to network outages and equipment malfunctions, severely impacting the stability and reliability of the broadcasting system.

[0005] In addition, although some flat panel speaker products have improved in form, they require an external power amplifier to drive them to produce sound, and a constant voltage transformer needs to be installed inside to achieve long-distance signal transmission, which leads to audio signal distortion and deterioration of frequency characteristics, while also increasing the complexity and cost of system wiring.

[0006] Meanwhile, existing distributed loudspeaker systems in public transportation hubs rely on manual triggering, pre-set broadcasts, or simple signal synchronization in emergency evacuation scenarios. They cannot visually identify the environment and broadcast guidance based on the situation. Furthermore, each loudspeaker operates synchronously in a fixed zone, lacking a cluster-based emergency directional guidance logic. This means they cannot provide guidance based on evacuation direction, nor can they create effective directional convergence evacuation guidance through differentiated broadcast content, volume, or regional control. Consequently, when passengers need to evacuate in an orderly manner, it is difficult to provide accurate and orderly guidance information. Specifically, in emergencies, people can only hear synchronized, fixed emergency alerts from all directions, but the evacuation direction cannot be accurately and quickly determined solely by the evacuation voice, failing to meet the intelligent requirements for route identification and directional guidance in public emergency evacuations. Utility Model Content

[0007] The purpose of this utility model is to provide an ultra-thin digital flat panel speaker device with optical network interface visual linkage broadcasting in order to solve the above problems. It connects to the optical network through optical cable ring network dual-link redundancy to realize a full optical network broadcasting system, which solves the problem of low reliability of traditional network cable connected speakers, and avoids the drawbacks of traditional network cables such as network disconnection and high bit error rate caused by electromagnetic interference.

[0008] The internally integrated constant voltage output transformer provides a cluster of node-type speaker areas, a PoE power module to simplify power supply wiring, and an optical module to enhance long-distance anti-interference transmission capabilities, reducing external equipment and lines and lowering installation and maintenance costs, as detailed below.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] This utility model provides an optical network interface visual linkage broadcast ultra-thin digital flat panel speaker device, including an optical network interface, a frame assembly, a surface sound source emission system, a signal processing module, a visual recognition assembly, and a cluster collaboration assembly;

[0011] The frame assembly includes a frame with an integrated optical network interface, a metal base plate, an insulating base plate, and sound-permeable metal mesh panels on the front and rear sides. The metal base plate and the insulating base plate are sequentially arranged inside the frame to form the device base, and the sound-permeable metal mesh panels cover the front and rear ends of the frame.

[0012] The signal processing module is integrated into the device substrate and includes a network decoding and wireless receiving module, a power supply and digital power amplifier module, a PoE power module and a network switch module. The network switch module is connected to the PoE power module and the network decoding and wireless receiving module respectively. The power supply and digital power amplifier module is electrically connected to the excitation oscillator to amplify the audio signal.

[0013] The visual recognition component includes a visual recognition camera, which is connected to the external interface of the network switch module via an optical cable; the power output terminal of the PoE power module is electrically connected to the power input terminal of the visual recognition camera via a power line in the optical cable.

[0014] The cluster collaboration component is based on the optical network ring network cascading function of the network switch module. Multiple devices can form an all-optical network cluster broadcast system. The all-optical network cluster broadcast system delineates emergency evacuation routes based on the abnormal scene recognition results of the visual recognition camera. The network switch module synchronously controls the power supply and digital power amplifier modules in the route to increase the volume of the surface sound source system to above the ambient noise level. At the same time, it controls the power supply and digital power amplifier modules of the devices in the non-path area to reduce the volume of the surface sound source system to less than 50% of the volume in the route to form directional guidance.

[0015] The aforementioned optical network interface visual linkage broadcast ultra-thin digital flat panel speaker device is used by embedding the device into a guide screen or fixing it in a predetermined position in a public place, such as a rail transit platform or airport passage, through the mounting brackets at the four corners of the frame. The front and rear double-sided sound-permeable metal mesh panels face the target area to ensure sound coverage. The visual recognition camera is connected to the IP network port on the side of the frame, and the PoE power module inside the device powers the camera to achieve real-time image acquisition. The optical module is connected to the optical fiber through the optical-electric composite cable connection hole to achieve long-distance signal transmission with the external control system. The power line is connected to the power switch through the optical-electric composite cable connection hole, and the power supply, digital power amplifier module, network switch module and other signal processing modules are powered on and started.

[0016] The visual recognition camera continuously collects images of the monitored area and transmits the data to the signal processing module through the network switch module. The network decoding and wireless receiving module is in standby mode, receiving and processing regular broadcast commands from external systems in real time. When a preset timing command or train signal linkage command is received, the network decoding and wireless receiving module encodes and decodes the locally preset or remotely transmitted audio signal. After being amplified by the power supply and digital power amplifier module, it drives the four sets of excitation oscillators of the surface sound source system to vibrate, driving the sound-generating honeycomb vibrating plate to broadcast sound in the form of a surface sound source. The environmental noise monitoring module collects the ambient sound pressure in real time and dynamically adjusts the broadcast volume to a clear state.

[0017] When the visual recognition camera detects sudden abnormal scenarios such as station accidents, fires, escalator falls, platform congestion, or passengers approaching the tracks, the camera transmits the abnormal signal through the IP network port to the network decoding and wireless receiving module via the network switch module. The network decoding and wireless receiving module quickly calls up the preset corresponding scenario voice information (such as emergency evacuation notices, "Attention, someone has fallen, please help to avoid them," etc.). After being amplified by the power supply and digital power amplifier module, it drives the excitation oscillator to drive the sound-emitting honeycomb vibrating plate to broadcast warning or guidance information. The environmental noise monitoring module adjusts the volume simultaneously to ensure that the broadcast sound pressure is higher than the environmental noise, while avoiding volume overload.

[0018] When a visual recognition camera identifies a scenario requiring emergency evacuation (such as a subway vehicle accident, flooding, fire, large-scale congestion, or safety warning): multiple devices form a network cluster broadcast system through the ring network cascading function of the network switch module, and delineate emergency evacuation routes based on the camera recognition results; the cluster system broadcasts to the area sound source systems along the route in numbered sections according to the evacuation direction, with 3-5 groups as independent broadcast units: the power supply and digital amplifier modules of the devices within the route increase the output power, making the volume of the area sound source systems higher than the ambient noise to ensure clear guidance information; the power supply and digital amplifier modules of the devices outside the route reduce the power, controlling the volume to less than 50% of the volume within the route to reduce interference; within each independent broadcast unit, after the previous area sound source system has completely broadcast the evacuation message (such as "Please evacuate to Exit 3 in this direction"), the next area sound source system automatically takes over the broadcast, with the broadcast order consistent with the evacuation direction, guiding the crowd to move in a specific direction through the intensity and timing of the sound.

[0019] The optical network transmission of this utility model relies on a dedicated optical-electric composite cable inserted into the connector of the optical-electric composite cable. Specifically, one optical-electric composite cable contains two optical fibers and two electrical wires. The two optical fibers serve as the two wavelength optical fibers of the ring network link, and the two electrical wires are used to provide 220V power. Among them, the two optical fibers transmit single-mode optical network data at wavelengths of 1550nm and 1310nm respectively. The two wavelengths are transmitted and received, which can ensure that the optical signal forms a ring network link, avoid signal interference and attenuation during long-distance transmission, and ensure that the system operation is not affected after a network disconnection occurs in the optical network loop.

[0020] Preferably, the top surface of the enclosure is provided with an optoelectronic composite cable serving as an optical network interface and a power switch. The power switch is connected to a power line that passes through the wiring hole of the optoelectronic composite cable into the enclosure. The power switch is electrically connected to the power supply and the digital power amplifier module. Mounting brackets are fixed at all four corners of the enclosure, and the mounting brackets enable the enclosure to be embedded in the guide screen or suspended.

[0021] Preferably, the surface sound source system includes a vibrator support, a constant voltage output transformer, a sound-generating honeycomb vibrating plate, and four sets of excitation vibrators. The vibrator support is fixed in the device base, the constant voltage output transformer is fixed in the center of the vibrator support, and the four sets of excitation vibrators are evenly distributed at the four corners of the vibrator support. The excitation vibrators are glued and fixed to the sound-generating honeycomb vibrating plate. The sound-generating honeycomb vibrating plate is driven by the vibration of the excitation vibrators to transmit sound in a surface sound source manner.

[0022] Preferably, the side of the frame is provided with an IP network port and an audio input port. The IP network port is connected to a network switch module, and the audio input port is electrically connected to the network decoding and wireless receiving module. The audio signal is encoded and decoded by the network decoding and wireless receiving module.

[0023] Preferably, the signal processing module further includes an environmental noise monitoring module and an optical module. The environmental noise monitoring module is connected to the network decoding and wireless receiving module and is used to automatically adjust the broadcast volume in a closed loop according to the environmental noise.

[0024] Preferably, the constant voltage output transformer is connected to the power supply and digital power amplifier module to extend the connection to external constant voltage speakers to form a low-cost zone cluster, and the optical module is connected to the optical fiber through the optical fiber composite cable connection hole to realize the network optical signal transmission with the external control system.

[0025] Preferably, the network decoding and wireless receiving module is connected to a wireless broadcast receiving antenna to receive wireless broadcast signals, and can also encode and decode preset broadcast information. The network switch module supports star or ring network topologies and can centrally control multiple devices through a network cluster broadcast system.

[0026] As a preferred embodiment, when the visual recognition camera detects an abnormal trigger evacuation scenario, the network cluster broadcasting system divides and numbers the surface sound source systems along the path according to the preset evacuation direction. Through synchronous control by the network switch module, 3 to 5 groups of surface sound source systems are used as an independent broadcasting unit. Within each independent broadcasting unit, the intelligent partitioned playback system broadcasts the surface sound source systems in a sorted manner. Within the independent broadcasting unit, after the previous surface sound source system has completely broadcast the evacuation message, the next surface sound source system takes over. The broadcasting order of the surface sound source systems in each group is consistent with the evacuation direction.

[0027] Preferably, the wireless broadcast receiving antenna is a spiral-type small flexible antenna, fixed to the top of the device base, used to receive wireless broadcast signals to enable manual priority broadcasting via walkie-talkie in emergency environments.

[0028] Preferably, the signal processing module further includes a status self-testing unit, which is electrically connected to the surface sound source system, the visual recognition camera, the POE power module, and the network switch module. It can monitor the camera connection status, POE power supply voltage, and network communication link status in real time. When any of the above-mentioned status abnormalities are detected, the status self-testing unit triggers the surface sound source system to play a preset local fault prompt sound.

[0029] The beneficial effects are as follows: 1. This utility model directly connects to the flat panel speaker through optical fiber, relies on an external visual recognition acquisition camera, and combines the real-time data transmission capability of the network switch module in the device to quickly identify abnormal scenarios such as subway accidents, fires, elevator and escalator falls, and platform congestion. The identification results are instantly converted into broadcast signals through the network decoding and wireless receiving module. After being amplified by the power supply and digital power amplifier module, the excitation oscillator is driven to vibrate, and then the sound is diffused by the planar sound-generating honeycomb vibrating plate in the form of a surface sound source. This achieves a rapid response from abnormal identification to broadcast playback, solves the problem of lag in traditional systems that rely on manual identification and triggering, and delivers safety warnings in the first instance, reducing the risk of secondary accidents.

[0030] 2. The device employs a surface sound source technology using a honeycomb vibrating plate, combined with an X-shaped vibrator bracket to provide stable support for the excitation vibrator. This keeps the overall thickness of the device within 30mm. The device can be directly embedded into the guide screen via brackets on both sides, without requiring additional space. This solves the problems of large size and difficulty in integration of traditional box-type loudspeakers, and enhances the aesthetics of public spaces.

[0031] 3. Based on the ring network cascading function of the network switch module, multiple devices can form an optical ring network intelligent partitioned network cluster broadcasting system. After the visual recognition camera delineates the evacuation route, the network cluster broadcasting system, through network synchronous control, increases the excitation oscillator driving power of the power supply and digital power amplifier modules of the devices within the evacuation route, and dynamically adjusts the volume in conjunction with the environmental noise monitoring module to ensure clear guidance sound. At the same time, devices in non-path areas reduce sound power to reduce interference, forming a volume convergence to guide the evacuation route. In addition, 3-5 groups of surface sound source sound systems are broadcast sequentially as an independent unit, allowing passengers to clearly understand the evacuation route and direction through sound intensity and sequence. This solves the problem of directional confusion caused by synchronous playback of traditional cluster speakers. The network is connected through a dual-link redundancy optical cable ring network to realize a full optical network broadcasting system, solving the problem of low reliability of traditional network cable connected speakers, and avoiding the drawbacks of traditional network cables such as network outages and high bit error rates caused by electromagnetic interference.

[0032] 4. The internal constant voltage output transformer can be extended to connect to an external constant voltage speaker, forming a micro-area with the device as the node to flexibly cover blind spots; the POE power module supplies power to the visual recognition camera through the IP network port, simplifying wiring; the wireless broadcast receiving antenna can receive emergency manual commands, so as to prioritize the broadcast of manual commands during manual broadcasting, improve system scalability, and reduce the burden on broadcasting operators. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0034] Figure 1 This is the main view structural diagram of this utility model;

[0035] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0036] Figure 3 This is a structural breakdown diagram of the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of the frame of this utility model;

[0038] Figure 5 This is a structural schematic diagram of the metal base plate of this utility model;

[0039] Figure 6 This is a left-side structural view of the present invention;

[0040] Figure 7 This is a three-dimensional structural diagram of another aspect of the present invention;

[0041] Figure 8 This is a structural dissection diagram of another aspect of this utility model;

[0042] Figure 9 This is a schematic diagram of the system connection of this utility model.

[0043] The annotations in the attached figures are explained as follows:

[0044] 1. Enclosure frame; 101. Power switch; 102. Fiber optic composite cable wiring hole; 103. Mounting bracket; 2. Metal base plate; 3. Insulating base plate; 301. Network decoding and wireless receiving module; 302. Power supply and digital power amplifier module; 303. PoE power module; 304. Optical module; 305. Network switch module; 306. Audio input port; 307. IP network port; 308. Environmental noise monitoring module; 4. Vibrator bracket; 5. Constant voltage output transformer; 6. Excitation vibrator; 7. Sound-emitting honeycomb vibrating plate; 8. Sound-permeable metal mesh plate; 9. Wireless broadcast receiving antenna; 10. Visual recognition camera; 11. Fiber optic cable. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0046] See Figures 1-9 As shown, this utility model provides an ultra-thin digital flat panel speaker device with optical network interface and visual linkage for broadcasting, including an optical network interface, a frame component, a surface sound source system, a signal processing module, a visual recognition component, and a cluster collaboration component;

[0047] The frame assembly includes a frame 1 with an integrated optical network interface, a metal base plate 2, an insulating base plate 3, and sound-permeable metal mesh plates 8 on the front and back sides. The metal base plate 2 and the insulating base plate 3 are sequentially arranged inside the frame 1 to form the device base. The sound-permeable metal mesh plates 8 cover the front and rear ends of the frame 1 to protect the internal components of the device and ensure sound transmission.

[0048] The signal processing module is integrated into the device body and includes a network decoding and wireless receiving module 301, a power supply and digital power amplifier module 302, a POE power module 303, and a network switch module 305. The network switch module 305 is connected to the POE power module 303 and the network decoding and wireless receiving module 301 respectively to realize data interaction and network communication between the modules. The power supply and digital power amplifier module 302 is electrically connected to the excitation oscillator 6 to amplify the audio signal and to provide sufficient power to the excitation oscillator 6 to drive the sound-generating honeycomb diaphragm 7 to vibrate and produce sound.

[0049] The visual recognition component includes a visual recognition camera 10, which is connected to the external interface of the network switch module 305 via a network cable 11; the power output terminal of the POE power module 303 is electrically connected to the power input terminal of the visual recognition camera 10 via the power line in the network cable 11; the visual recognition camera 10 monitors abnormal scenes such as vehicle accidents, fires, natural disasters, and escalator accidents in real time and triggers broadcasts.

[0050] The cluster collaboration component is based on the optical network ring network cascading function of the network switch module 305. Multiple devices can form an all-optical network cluster broadcast system to realize the collaborative linkage and unified control of multiple devices. The all-optical network cluster broadcast system delineates emergency evacuation routes based on the abnormal scene recognition results of the visual recognition camera 10. The network switch module 305 synchronously controls the power supply and digital power amplifier module 302 in the route to increase the volume of the surface sound source emission system to above the ambient noise level, so as to ensure that people on the evacuation route can clearly receive the guidance information. At the same time, it controls the power supply and digital power amplifier module 302 of the devices in the non-path area to reduce the volume of the surface sound source emission system to less than 50% of the volume in the path to form directional guidance, so as to avoid sound interference in non-evacuation areas and strengthen the sound guidance of the path direction.

[0051] As an optional implementation, the surface sound source system includes a vibrator support 4, a constant voltage output transformer 5, a sound-generating honeycomb vibrating plate 7, and four sets of excitation vibrators 6. The vibrator support 4 is fixed in the device base, the constant voltage output transformer 5 is fixed in the center of the vibrator support 4, and the four sets of excitation vibrators 6 are evenly distributed at the four corners of the vibrator support 4. The excitation vibrators 6 are glued and fixed to the sound-generating honeycomb vibrating plate 7. The sound-generating honeycomb vibrating plate 7 is driven by the vibration of the excitation vibrators 6 to propagate sound in the form of a surface sound source. With this configuration, the stable support of the X-shaped vibrator support 4 and the symmetrical distribution of the excitation vibrators 6 can ensure that the sound-generating honeycomb vibrating plate 7 vibrates evenly, realizing the non-directional deviation propagation of the surface sound source.

[0052] The side of the enclosure 1 is provided with an IP network port 307 and an audio input port 306. The IP network port 307 is connected to the network switch module 305 to realize the wired connection between the device and the external network and other cluster devices. The audio input port 306 is electrically connected to the network decoding and wireless receiving module 301. The audio signal is encoded and decoded by the network decoding and wireless receiving module 301. With this configuration, the device can access external audio sources to realize diverse broadcasting, and the encoding and decoding optimization ensures high-fidelity transmission of audio signals.

[0053] The top surface of the enclosure 1 is provided with a power switch 101 and a fiber optic composite cable connection hole 102, which serves as an optical network interface. These are used to control the on / off of the main power supply of the device and to run optical fibers, power lines, and other lines. The power switch 101 is connected to a power line that passes through the fiber optic composite cable connection hole 102 and exits the enclosure 1. The power switch 101 is electrically connected to the power supply and digital power amplifier module 302. Furthermore, there are mounting brackets 103 fixed at all four corners of the enclosure 1. The mounting brackets 103 enable the enclosure 1 to be installed in an embedded guide screen or suspended. This configuration can adapt to the installation requirements of different scenarios and improve the integration of the device with peripheral equipment.

[0054] The signal processing module also includes an environmental noise monitoring module 308 and an optical module 304. The environmental noise monitoring module 308 is connected to the network decoding and wireless receiving module 301 and is used to automatically adjust the broadcast volume in a closed loop according to the environmental noise. The constant voltage output transformer 5 is connected to the power supply and digital power amplifier module 302 to extend the connection to an external constant voltage speaker, thereby expanding the broadcast coverage and compensating for the sound field blind spots of a single device. The optical module 304 is connected to an optical fiber through the optical fiber composite cable connection hole 102 to realize the optical signal transmission with the external control system, thereby ensuring the anti-interference and stability of long-distance communication.

[0055] The network decoding and wireless receiving module 301 is connected to the wireless broadcast receiving antenna 9 to receive wireless broadcast signals. It can also encode and decode preset broadcast information to enable priority triggering of emergency manual broadcasts and rapid recall of local preset voice messages. The network switch module 305 supports star or ring network topologies, preferably a ring network topology. Specifically, the ring network topology, relying on the ring cascading function of the network switch module 305, can achieve closed-loop connection of multiple devices. When a device node experiences a communication failure, data can be transmitted via the reverse path, ensuring uninterrupted communication links in the network cluster broadcast system. This guarantees synchronous control of multiple devices in emergency evacuation scenarios, such as differentiated volume adjustment and orderly broadcasting. Furthermore, the ring topology does not rely on a central node, reducing the impact of a single node failure on overall cluster coordination. It is more suitable for emergency broadcasting needs in public places with high communication stability requirements, such as rail transit and airports. In short, multiple devices can be centrally controlled through the network cluster broadcast system.

[0056] When the visual recognition camera 10 detects an abnormal trigger evacuation scenario, the network cluster broadcasting system divides and numbers the surface sound source systems along the path according to the preset evacuation direction. It is synchronously controlled by the network switch module 305, with 3 to 5 groups of surface sound source systems as an independent broadcasting unit. Within each independent broadcasting unit, the surface sound source systems are broadcast in sequence. After the previous surface sound source system has completely broadcast the evacuation message, the next surface sound source system takes over. The broadcasting order of the surface sound source systems in each group is consistent with the evacuation direction. This is used to guide the crowd to move along the evacuation direction through the sequential progression of sound, avoiding confusion. The wireless broadcast receiving antenna 9 is a spiral small flexible antenna, fixed to the top of the device base, used to receive wireless broadcast signals to enable manual priority broadcasting via walkie-talkie in emergency environments.

[0057] The signal processing module also includes a status self-test unit, which is electrically connected to the surface sound source system, the visual recognition camera 10, the POE power module 303, and the network switch module 305. It can monitor the camera connection status, POE power supply voltage, and network communication link status in real time. When any of the above statuses are detected to be abnormal, the status self-test unit triggers the surface sound source system to play a preset local fault prompt tone to promptly warn of equipment failures, making it easier for maintenance personnel to quickly locate and handle problems, and ensuring the continuous operation of the system.

[0058] Using the above structure, during use, the device is embedded into the guide screen or fixed in a public place, such as a rail transit platform or airport passage, by means of the mounting brackets 103 at the four corners of the frame 1. The front and rear double-sided sound-permeable metal mesh panels 8 face the target area to ensure sound coverage. The visual recognition camera 10 is connected to the IP network port 307 on the side of the frame 1 via a network cable 11. The POE power module 303 inside the device powers the camera to achieve real-time image acquisition. The optical module 304 is connected to the optical fiber through the optical-electric composite cable connection hole 102 to achieve long-distance signal transmission with the external control system. The power cord is connected to the power switch 101 through the optical-electric composite cable connection hole 102, and the power supply and digital power amplifier module 302, network switch module 305 and other signal processing modules are powered on and started.

[0059] The visual recognition camera 10 continuously collects images of the monitoring area and transmits the data to the signal processing module through the network switch module 305. The network decoding and wireless receiving module 301 is in standby mode, receiving and processing regular broadcast commands from external systems in real time. When a preset timing command or train signal linkage command is received, the network decoding and wireless receiving module 301 encodes and decodes the locally preset or remotely transmitted audio signal. After being amplified by the power supply and digital power amplifier module 302, it drives the four sets of excitation oscillators 6 of the surface sound source system to vibrate, thereby driving the sound-generating honeycomb vibrating plate 7 to broadcast sound in the form of a surface sound source. The environmental noise monitoring module 308 collects the environmental sound pressure in real time and dynamically adjusts the broadcast volume to a clear state.

[0060] When the visual recognition camera 10 detects sudden abnormal scenarios such as emergencies, natural disasters, elevator or escalator falls, platform congestion, or passengers approaching the tracks, the camera transmits the abnormal signal through the IP network port 307 to the network decoding and wireless receiving module 301 via the network switch module 305. The network decoding and wireless receiving module 301 quickly calls up the preset corresponding scene voice information (such as "Please note, someone has fallen, please help to avoid them," etc.), which is amplified by the power supply and digital power amplifier module 302 and drives the excitation oscillator 6 to drive the sound-emitting honeycomb vibrating plate 7 to broadcast warning or guidance information. The environmental noise monitoring module 308 adjusts the volume synchronously to ensure that the broadcast sound pressure is higher than the environmental noise, while avoiding volume overload.

[0061] When the visual recognition camera 10 identifies a scenario requiring emergency evacuation (such as large-scale congestion or safety warning): multiple devices form an intelligent network cluster broadcast system through the ring network cascading function of the network switch module 305, and delineate emergency evacuation routes based on the camera recognition results; the cluster system numbers and sorts the area sound source emission systems on the route according to the automatically planned evacuation direction, with 3-5 groups as independent broadcast units; the power supply and digital power amplifier module 302 of the devices within the route increase the output power, making the volume of the area sound source emission system higher than the ambient noise, ensuring clear guidance information; the power supply and digital power amplifier module 302 of the devices outside the route increase the output power, making the volume of the area sound source emission system higher than the ambient noise, ensuring clear guidance information; the power supply and digital power amplifier module 302 of the devices outside the route increase the output power, making the volume of the area sound source emission system higher than the ambient noise, ensuring clear guidance information. The 302 amplifier reduces power and controls the volume to below 50% of the volume within the path to reduce interference. Within each independent broadcasting unit, after the preceding sound source system has fully broadcasted the evacuation message (e.g., please evacuate to Exit 3 in this direction), the next sound source system automatically takes over the broadcast. The broadcasting order is consistent with the evacuation direction. The system guides the directional movement of the crowd by adjusting the volume and timing of the sound. The system is connected to the network through a dual-link redundancy optical cable ring network, realizing a full optical network broadcasting system. This solves the problem of low reliability of traditional network cable-connected speakers and avoids the drawbacks of traditional network cables, such as network outages and high error rates caused by electromagnetic interference.

[0062] The optical network transmission of this utility model relies on a dedicated optical-electric composite cable inserted into the connector of the optical-electric composite cable. Specifically, a single optical-electric composite cable contains two optical fibers and two electrical wires. The two optical fibers serve as the two wavelength fibers of the ring network link, and the two electrical wires are used to provide 220V power. Among them, the two optical fibers transmit single-mode optical network data at wavelengths of 1550nm and 1310nm respectively. The two wavelengths are used for transmission and reception, which can ensure that the optical signal avoids signal interference and attenuation during long-distance transmission. At the same time, based on the dual-fiber (1550nm / 1310nm single-mode wavelength) and dual-electric wire (220V power supply) structure of the optical-electric composite cable, it not only ensures the anti-interference and stability of long-distance optical signal transmission, but also simplifies power supply wiring, avoids additional power lines, and thus reduces installation costs.

[0063] By relying on an external visual recognition acquisition camera and combining the real-time data transmission capability of the network switch module 305 inside the device, abnormal scenarios such as elevator and escalator falls and platform congestion can be quickly identified. The identification results are converted into broadcast signals in real time by the network decoding and wireless receiving module 301. After being amplified by the power supply and digital power amplifier module 302, the excitation vibrator 6 is driven to vibrate. The sound is then diffused by the planar sound-generating honeycomb vibrating plate 7 in the form of a surface sound source, realizing a rapid response from abnormal identification to broadcast playback. This solves the problem of lag caused by the reliance on manual identification triggering in traditional systems, and delivers safety warnings in the first instance, reducing the risk of secondary accidents.

[0064] The device employs a surface sound source technology using a sound-generating honeycomb vibrating plate 7, along with an X-shaped vibrator bracket 4 to provide stable support for the excitation vibrator 6. This keeps the overall thickness of the device within 30mm. The device can be directly embedded into the guide screen via the mounting brackets 103 on both sides, without requiring additional space. This solves the problems of large size and difficulty in integration of traditional box-type loudspeakers, and enhances the aesthetics of public space layouts.

[0065] Based on the ring network cascading function of the network switch module 305, multiple devices can form a network cluster broadcasting system. When the visual recognition camera 10 assists in delineating the evacuation route, the network cluster broadcasting system, through network synchronous control, increases the driving power of the excitation oscillator 6 of the devices within the evacuation route and the excitation oscillator module 302. Combined with the environmental noise monitoring module 308, the volume is dynamically adjusted to ensure clear guidance sound. At the same time, devices in non-path areas reduce their sound power to reduce interference, forming a volume convergence that guides the evacuation route. Meanwhile, 3 to 5 groups of surface sound source systems are used as independent units for sequential broadcasting, allowing passengers to clearly understand the evacuation route and direction through the intensity and order of the sound. This solves the problem of directional confusion caused by traditional broadcast loudspeakers only being able to play synchronously in fixed zones.

[0066] The internal constant voltage output transformer 5 can be extended to connect to an external constant voltage speaker to form a regional node cluster centered on the device, flexibly covering blind spots and effectively reducing system costs; the POE power module 303 supplies power to the visual recognition camera 10 through the IP network port 307, simplifying wiring; the wireless broadcast receiving antenna 9 can receive emergency manual commands, so as to prioritize the broadcast of manual commands during manual broadcasting, improve system scalability, and reduce the burden on broadcasting operators.

[0067] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A fiber optic visual linkage broadcast ultra-thin digital flat panel speaker device, characterized in that, This includes optical network interfaces, frame components, surface sound source emission systems, signal processing modules, visual recognition components, and cluster collaboration components; The frame assembly includes a frame (1) with an integrated optical network interface, a metal base plate (2), an insulating base plate (3), and sound-permeable metal mesh plates (8) on the front and back sides. The metal base plate (2) and the insulating base plate (3) are sequentially arranged inside the frame (1) to form the device base, and the sound-permeable metal mesh plates (8) cover the front and rear ends of the frame (1). The signal processing module is integrated into the device substrate and includes a network decoding and wireless receiving module (301), a power supply and digital power amplifier module (302), a POE power supply module (303), and a network switch module (305). The network switch module (305) is connected to the POE power supply module (303) and the network decoding and wireless receiving module (301) respectively. The power supply and digital power amplifier module (302) is electrically connected to the excitation oscillator (6) to amplify the audio signal. The visual recognition component includes a visual recognition camera (10), which is connected to the external interface of the network switch module (305) via a network cable (11); the power output terminal of the POE power module (303) is electrically connected to the power input terminal of the visual recognition camera (10) via the power line in the network cable (11). The cluster collaboration component is based on the optical network ring network cascading function of the network switch module (305). Multiple devices can form an all-optical network cluster broadcast system. The all-optical network cluster broadcast system delineates emergency evacuation routes based on the abnormal scene recognition results of the visual recognition camera (10). The network switch module (305) synchronously controls the power supply and digital power amplifier module (302) in the path to increase the volume of the surface sound source system to above the ambient noise. At the same time, it controls the power supply and digital power amplifier module (302) of the devices in the non-path area to reduce the volume of the surface sound source system to less than 50% of the volume in the path to form directional guidance.

2. The ultra-thin digital flat panel speaker device for optical network visual linkage broadcasting according to claim 1, characterized in that, The surface sound source system includes a vibrator support (4), a constant voltage output transformer (5), a sound-generating honeycomb vibrating plate (7), and four sets of excitation vibrators (6). The vibrator support (4) is fixed in the device base, the constant voltage output transformer (5) is fixed in the center of the vibrator support (4), and the four sets of excitation vibrators (6) are evenly distributed at the four corners of the vibrator support (4). The excitation vibrators (6) are glued and fixed to the sound-generating honeycomb vibrating plate (7). The sound-generating honeycomb vibrating plate (7) is driven by the vibration of the excitation vibrators (6) to transmit sound in the form of a surface sound source.

3. The ultra-thin digital flat panel speaker device for optical network visual linkage broadcasting according to claim 2, characterized in that, The frame (1) is provided with an IP network port (307) and an audio input port (306) on its side. The IP network port (307) is connected to the network switch module (305), and the audio input port (306) is electrically connected to the network decoding and wireless receiving module (301). The audio signal is encoded and decoded by the network decoding and wireless receiving module (301).

4. The ultra-thin digital flat panel speaker device for optical network visual linkage broadcasting according to claim 3, characterized in that, The top surface of the enclosure (1) is provided with a power switch (101) and a photoelectric composite cable connection hole (102) serving as an optical network interface. A power line is connected to the power switch (101) and passes through the photoelectric composite cable connection hole (102) and exits the enclosure (1). The power switch (101) is electrically connected to the power supply and digital power amplifier module (302). Mounting brackets (103) are fixed at all four corners of the enclosure (1). The mounting brackets (103) enable the enclosure (1) to be installed by embedding the guide screen or by hanging.

5. The ultra-thin digital flat panel speaker device for optical network visual linkage broadcasting according to claim 4, characterized in that, The signal processing module also includes an environmental noise monitoring module (308) and an optical module (304). The environmental noise monitoring module (308) is connected to the network decoding and wireless receiving module (301) and is used to automatically adjust the broadcast volume in a closed loop according to the environmental noise.

6. The ultra-thin digital flat panel speaker device for optical network visual linkage broadcasting according to claim 5, characterized in that, The constant voltage output transformer (5) is connected to the power supply and digital power amplifier module (302) to extend the connection to the external constant voltage speaker. The optical module (304) is connected to the optical fiber through the optical fiber composite cable connection hole (102) to realize the optical signal transmission with the external control system.

7. The ultra-thin digital flat panel speaker device for optical network visual linkage broadcasting according to claim 1, characterized in that, The network decoding and wireless receiving module (301) is connected to a wireless broadcast receiving antenna (9) to receive wireless broadcast signals, and can also encode and decode preset broadcast information.

8. The ultra-thin digital flat panel speaker device for optical network visual linkage broadcasting according to claim 7, characterized in that, When the visual recognition camera (10) recognizes an abnormal trigger evacuation scenario, the network cluster broadcast system divides and numbers the surface sound source systems on the path according to the preset evacuation direction. Through the synchronous control of the network switch module (305), 3 to 5 groups of surface sound source systems are used as an independent broadcasting unit. The surface sound source systems are broadcast in order within each independent broadcasting unit. Within the independent broadcasting unit, after the previous surface sound source system has completely broadcast the evacuation voice, the next surface sound source system takes over the broadcast. The broadcast order of the surface sound source systems in each group is consistent with the evacuation direction.

9. The ultra-thin digital flat panel speaker device for optical network visual linkage broadcasting according to claim 8, characterized in that, The wireless broadcast receiving antenna (9) is a spiral small flexible antenna, fixed on the top of the device base, used to receive wireless broadcast signals to realize manual priority broadcasting of walkie-talkies in emergency environments.

10. The ultra-thin digital flat panel speaker device for optical network visual linkage broadcasting according to claim 1, characterized in that, The signal processing module also includes a status self-testing unit, which is electrically connected to the surface sound source system, the visual recognition camera (10), the POE power module (303), and the network switch module (305). It can monitor the camera connection status, POE power supply voltage, and network communication link status in real time. When any of the above statuses are detected to be abnormal, the status self-testing unit triggers the surface sound source system to play a preset local fault prompt sound.

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