A scenario-based intelligent broadcasting system

Abstract

The application relates to the technical field of intelligent broadcasting, in particular to a scene-based intelligent broadcasting system which comprises a point position terminal, a slave terminal, a host terminal and a server. The point position terminal sends data through optical signals after receiving the data; the slave terminal receives the optical signals and decodes the data, and simultaneously converts the optical signals into electric energy for power supply by using photoelectric devices of the slave terminal; the host terminal collects data, encodes the data and transmits the data through optical signals; each terminal is connected with the server through an Ethernet bus, and all contents are maintained through the network bus. The photoelectric devices have the functions of receiving optical data and photoelectric conversion for power supply; the light source modulates and transmits data and controls the coverage range when illuminating; the explanation of the visitors and exhibits or scenic spots is only related through the positional relationship, and the experience of the users is improved.

Description

Technical Field

[0001] This invention belongs to the field of intelligent broadcasting technology, and specifically relates to a scenario-based intelligent broadcasting system. Background Technology

[0002] With the development of the times, more people are spending their free time traveling. Tour guides can better help tourists understand history and culture. In tour guide scenarios, common wireless data transmission methods include radio broadcasting, Bluetooth, or WiFi. In practice, the appropriate method is chosen based on the scenario. For example, Bluetooth is chosen for point-to-point audio transmission, while WiFi is chosen for data transmission with high bandwidth requirements. Walkie-talkies or radio broadcasting can also be used.

[0003] In situations where visitors are dispersed but require fixed-point guided tours (individual visitors to exhibition halls and attractions), the project team broadcasts the locations via radio beacons. Visitors wear earphone receivers, and when a visitor approaches a beacon, a pre-stored audio file in the receiver is played. This method has several problems, including: crosstalk between beacons causing misaligned playback, complex management of the receiver's built-in content, and a large workload for battery management across multiple beacons and numerous receivers.

[0004] In situations where staff or tour guides lead the group of tourists on a walk, sightseeing, and explanation, a one-to-many Bluetooth or radio broadcast method is typically used to transmit the guide's voice to each tourist's earpiece. Problems with this method include:

[0005] 1. When multiple teams present simultaneously in the venue, they may interfere with each other or crosstalk due to their similar working frequencies.

[0006] 2. Leakage of radio frequency signals into the external environment lacks security and privacy;

[0007] 3. Tourists may find it difficult to obtain the explanations they need when they leave the group for independent exploration;

[0008] 4. There is a problem with insufficient battery power during long-term explanations.

[0009] In view of this, the present invention is hereby proposed. Summary of the Invention

[0010] To address the aforementioned technical problems in existing technologies, this invention provides a scenario-based intelligent broadcasting system. This system solves the problem of mutual interference or crosstalk when multiple teams provide explanations simultaneously due to their similar operating frequencies. Furthermore, by setting the transmission range of the optical signal, it avoids leakage of radio frequency signals into the external environment, thus ensuring security and privacy. The placement of the points ensures that tourists can access the explanations they need while freely exploring the site. By converting the optical signal into electrical energy to power the equipment, it alleviates users' anxiety about the device's battery life.

[0011] To achieve the above objectives, the technical solution of the present invention is as follows:

[0012] A scenario-based intelligent broadcasting system includes:

[0013] Point terminal: Used to receive data information and transmit the data information by carrying optical signals;

[0014] Slave terminal: Used to receive the optical signal from the point terminal, extract the optical signal carrying the data information from it, and decode it to obtain the data information; and to convert the received optical signals into electrical energy to provide electrical energy to the slave terminal.

[0015] Furthermore, the point terminal includes:

[0016] Point receiving unit: used to receive data information from the host or data information sent by the server, or data information from the host and data information sent by the server;

[0017] Point processing unit: used to decode the received data information and generate an optical signal carrying the data based on the decoded information;

[0018] Point-to-point transmission unit: used to transmit the optical signal generated by the point-to-point processing unit.

[0019] Furthermore, the data information is selected from at least one of multimedia data and control information.

[0020] Furthermore, it also includes:

[0021] Host terminal: Used to acquire data information sent by the location terminal and transmit the data information via optical signals.

[0022] Furthermore, it also includes a server, and the point terminals, host terminals, and slave terminals are connected to the server via an Ethernet bus.

[0023] Furthermore, the host terminal includes:

[0024] Host acquisition unit: Used to collect data information;

[0025] Host processing unit: Used to encode the data information picked up by the host acquisition unit, and to preprocess, extract features, and encrypt the data information;

[0026] Main unit transmitting: Used to transmit data information to the effective area of ​​the point location via optical signals.

[0027] Furthermore, the slave device includes:

[0028] Slave receiving unit: used to receive the optical signal from the point terminal;

[0029] Slave optoelectronic device: used to convert the optical signal received by the slave receiving unit into electrical energy and to power the slave end;

[0030] Slave processing unit: used to decode the optical signal received by the slave receiving unit and output the decoded data information.

[0031] Furthermore, it also includes:

[0032] Slave energy storage unit: used to store electrical energy converted from optical signals and to supply power to the slave device.

[0033] Furthermore, the slave optoelectronic device is selected from: perovskite solar cells, silicon solar cells, polycrystalline thin-film solar cells, organic polymer solar cells, nanocrystalline solar cells, organic thin-film solar cells, dye-sensitized solar cells, plastic solar cells, novel perovskite-derived solar cells, compound semiconductor solar cells, or tandem solar cells.

[0034] Furthermore, the light signal is emitted through a light-emitting device, which is selected from LEDs, spotlights, or laser emitters.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The above-mentioned scenario-based intelligent broadcasting system provided by this invention includes a collaborative system architecture of point terminals, slave terminals, master terminals, and a server. It utilizes optoelectronic devices at the slave terminals to convert optical signals into electrical energy, integrating optical signal data transmission and optoelectronic device power supply technologies to solve the problem of insufficient battery power in existing broadcasting equipment. The point terminals receive data and transmit it via optical signals, while the slave terminals receive and decode the optical signals to obtain information data, addressing the lack of security and privacy due to radio frequency signal leakage to the external environment. The master terminal collects data, encodes it, and transmits it via optical signals. All terminals are connected to the server via an Ethernet bus, improving transmission efficiency, ease of device management, and information security. This provides an efficient, secure, and user-friendly intelligent broadcasting solution for scenarios such as exhibition hall visits and group tours. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the architecture of the scenario-based intelligent broadcasting system provided in an embodiment of the present invention;

[0038] Figure 2 A schematic diagram of the architecture of the point terminal provided in an embodiment of the present invention;

[0039] Figure 3 A schematic diagram of the slave device architecture provided in an embodiment of the present invention;

[0040] Figure 4A schematic diagram of the host architecture provided for an embodiment of the present invention;

[0041] Figure 5 An equivalent circuit diagram for controlling the emission of light signals from a light source, provided in an embodiment of the present invention;

[0042] Figure 6 The equivalent circuit diagram for restoring analog signals provided in the embodiments of the present invention;

[0043] Figure 7 This is a schematic diagram of the photoelectric conversion process of the optoelectronic device provided in an embodiment of the present invention. Detailed Implementation

[0044] The technical solution of the present invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0045] It should be noted that, unless otherwise specifically stated, the relative arrangement and numerical expressions of the components and steps described in these embodiments should not be construed as limiting the scope of the invention.

[0046] The following description of exemplary embodiments is merely illustrative and is not intended to limit the invention or its application or use in any way. Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail herein, but where applicable, such techniques, methods, and apparatus should be considered part of this specification.

[0047] See Figure 1 , Figure 1 This is a schematic diagram of a scenario-based intelligent broadcasting system proposed in an embodiment of the present invention. The system constructs a collaborative system architecture including point terminals, slave terminals, master terminals, and servers, integrating optical signal data transmission with optoelectronic device power supply to ensure data transmission effectiveness while guaranteeing continuous energy supply and information security. This system can adapt to the needs of complex scenarios such as scenic spots, museums, industrial parks, and theme parks.

[0048] like Figure 1 As shown, this scenario-based intelligent broadcasting system may specifically include: point terminals, slave terminals, master terminals, and a server. The point terminals, master terminals, and slave terminals are connected to the server via an Ethernet bus. The point terminals include point 1, point 2, point 3, and point 4, but are not limited to these four points; multiple points can be set according to actual needs. The master terminals include, but are not limited to, master 1 and master 2.

[0049] The point terminals can be deployed as needed in a designated scene, and data transmission isolation between different points can be achieved by controlling the coverage area of ​​the light source. The point terminals are used to receive data information and transmit it via optical signals. The data information includes multimedia data, control information, or a combination of multimedia data and control data. (See also...) Figure 2 Each point at the aforementioned point terminal specifically includes:

[0050] Point receiving unit: Used to receive data information from the host, including control signals, and to set different point transmission content according to the control signals; it can also upload the received data information to other devices in the network; and receive data information sent by the server.

[0051] Each point has a unique ID. When the host sends data, it encapsulates the complete data packet into multiple data frames according to a proprietary protocol and then broadcasts them sequentially. Each data frame contains the receiving point ID, data packet information, control codes, and data content. After the data frame is broadcast, all points receive it and begin decoding. If a point finds that the receiving point ID in the data frame does not match its own ID, it will stop receiving that data frame and wait for the next data frame; if it finds that the ID matches its own, it will continue receiving the data frame. The point processing unit is used to decode the received data information and encode it to generate an optical signal carrying the data; the data information includes control information and multimedia data.

[0052] Point-to-point transmission unit: used to transmit the data information by carrying optical signals; the data information includes data sent by the host to other devices in the network, as well as content sent by the server through the network;

[0053] See Figure 5 and Figure 6 When transmitting an analog signal, the signal is first DC-biased and then connected to the base of an equivalent transistor. The transistor operates in amplification mode, and the analog signal controls the base current, thereby regulating the collector current flowing to the light source. Since the light source's emission power is positively correlated with the injected current, its power curve precisely matches the analog signal's curve. At the receiver, the photodetector receives the optical signal and removes the DC-biased component through a capacitive coupling circuit, directly reconstructing the original analog signal.

[0054] Due to the prevalence of interference in the environment, to improve anti-interference capabilities, the signal can first be modulated with an AM (amplitude modulation) or FM (frequency modulation) carrier before being transmitted through an equivalent transistor. Upon receiving the signal, the receiver first uses a high-pass filter to eliminate low-frequency environmental interference, and then demodulates the signal to restore the original analog signal.

[0055] AM modulation causes the amplitude of the carrier wave to vary according to the modulating signal. The mathematical expression for AM modulation of an audio signal is:

[0056]

[0057] in, For carrier amplitude, The modulation index, To modulate audio signals, For time variables, This is the angular frequency of the carrier signal. In quadrature modulation, ,right The Fourier transform yields:

[0058]

[0059] in, The spectrum representing the signal. For carrier amplitude, Pi and These represent the carrier angular frequencies respectively. and , The modulation index, To modulate audio signals.

[0060] A sinusoidally modulated amplitude-modulated signal consists of three frequency components: the carrier wave, the difference frequency between the carrier and the modulation frequency, and the sum frequency between the carrier and the modulation frequency. The bandwidth of the amplitude-modulated wave is equal to twice the highest frequency of the modulating signal.

[0061] FM modulation can propel the signal carrier to a higher frequency, achieving stronger interference immunity and greater data bandwidth than AM modulation. In FM modulation, the instantaneous frequency of the carrier determines the linear change of the modulating signal, as expressed mathematically below:

[0062]

[0063] in, The amplitude of the signal. The carrier angular frequency, For time variables, This is the phase constant; the spectrum of an FM signal contains an infinite number of spectral components, and theoretically, the bandwidth of an FM signal has no upper limit, but in practical applications, the effective bandwidth is as follows:

[0064]

[0065] in, The bandwidth of the frequency modulation signal. Frequency modulation index, The frequency of the modulated signal, This represents the maximum frequency offset.

[0066] when <<1 hour, ≈2 ;when >>1 hour, ≈ .

[0067] In a digital signal transmission system, the signal processing flow at the transmitting end is as follows: First, the data bits "0" and "1" in the digital signal need to be precisely mapped to "low" and "high" levels through a specific encoding method (such as return-to-zero code, non-return-to-zero code, etc.). The high and low levels are then used as driving signals for the light source after DC offset. When the data bits change, the DC-offset level signal drives the light source: when the data bit is "1", the driving signal causes the light source to emit at high power; when the data bit is "0", the driving signal causes the light source to reduce its emission power, thus achieving dynamic matching between the emission power and the data bit state.

[0068] The photodetector at the receiving end continuously senses the optical signal emitted by the light source. As the optical power at the transmitting end changes due to variations in the data bits, the optical power received by the detector changes synchronously, converting the optical power fluctuations into changes in electrical signal power. Subsequent circuitry performs rectification on this electrical signal, removing the DC component introduced by DC offset, and ultimately restoring the high and low levels that strictly correspond to those at the transmitting end. This restored level signal, which carries the original information in the digital data bits, completes the full transmission loop of the digital signal from transmission to reception.

[0069] By controlling the emission angle, direction, intensity, and partial shielding of the light following the carrier wave, the location and extent of the irradiated area can be determined. This irradiated area is the effective region for data transmission, allowing simultaneous operation to multiple irradiated receivers within this region. In situations requiring confidentiality of broadcast content, radio frequency signals can easily leak into the external environment through transmission or diffraction, making them vulnerable to interception and eavesdropping. This invention utilizes light signals that propagate in a straight line; directly blocking the light's propagation path effectively prevents signal leakage.

[0070] Meanwhile, systems that operate using radio broadcasting have the following problems: (1) crosstalk may occur between different but similar broadcast channels; (2) they may be affected by electromagnetic interference when facing complex radio frequency environments.

[0071] The system of the explanation machine that uses a combination of radio frequency identification (RFID) and built-in audio files has the following problems: (1) due to the overlapping coverage of RFID, the wrong audio files may be triggered; (2) the radio coverage of RFID can only be controlled by limiting the transmission power, but there is a lower limit to the transmission power, which makes its minimum coverage greater than one meter.

[0072] In this solution, the illumination range is the coverage area. For a single light source, the coverage area can be set to the centimeter level using simple methods such as adjusting the emission angle and shading. Since light travels in a straight line, there is no crosstalk problem between light sources as long as their coverage areas do not overlap.

[0073] In scenic areas, tourists typically use a slave device. This slave device receives optical signals from designated locations, extracts the optical signals carrying data information, and decodes them to obtain the data information. Tourists can hear the guide's explanations when within the range of designated locations; the explanations stop when they leave the range, allowing for free exploration. During free exploration, tourists can hear the automatic explanations for locations not designated by the guide when within that range. The information received by the slave device is closely linked to the tourist's location. (See also...) Figure 3 The slave device specifically includes:

[0074] Slave receiving unit: used to receive optical signals at its location;

[0075] Slave optoelectronic device: Used to convert various optical signals received by the slave receiving unit into electrical energy and power the slave end; the slave optoelectronic device is placed within the illumination range of the light source, and the power output terminal of the optoelectronic device is coupled to a signal processing device. After preprocessing such as rectification, filtering, and amplification, the transmitted content at the point end can be obtained. At the same time, the optoelectronic device also generates photovoltaic energy when it is irradiated by the transmitting end or ambient light. Therefore, the output terminal of the optoelectronic device is also connected to a power harvesting device for power supply and energy storage at the slave end.

[0076] The specific content to be acquired at the point of view includes: when the received signal is a directly transmitted analog signal, it is amplified and sent directly to the speaker unit for sound playback; when receiving an AM or FM modulated analog signal, the received signal is first demodulated in AM or FM mode, and then amplified and sent to the speaker; when receiving an AM or FM modulated control or data signal, the data is also demodulated first to obtain the high and low level signals corresponding to the data bits.

[0077] The following are examples of optoelectronic devices: perovskite solar cells, monocrystalline silicon solar cells, polycrystalline silicon solar cells, amorphous silicon solar cells, polycrystalline thin-film solar cells (cadmium sulfide, cadmium telluride, gallium arsenide, copper indium gallium selenide, etc.), organic polymer solar cells, nanocrystalline solar cells, organic thin-film solar cells, dye-sensitized solar cells, plastic solar cells, novel perovskite-derived cells, compound semiconductor solar cells, or tandem cells.

[0078] See Figure 7 When the photoelectric device receives light input, it generates an open-circuit voltage. At this time, the charging controller in the receiver is triggered to start full-power energy storage. The voltage of the photoelectric device drops to the MPPT voltage, and a loop timer is started to trigger signal detection. After a period of time, signal detection is triggered, energy storage pauses, and the photoelectric device restores its open-circuit voltage to improve the signal-to-noise ratio. The controller then checks for signal input. If no signal is received, full-power energy storage resumes until the next signal detection is triggered. If a signal is received, the controller reduces the energy storage power, restoring the photoelectric device voltage to a "set value" higher than the MPPT voltage, and begins receiving data.

[0079] If the fluctuation amplitude of the light signal is lower than a preset threshold, the controller determines that there is no valid signal, the system exits the data receiving mode, and returns to the cycle of energy storage and signal detection. When the optoelectronic device completely loses light, the system detects no energy input and automatically switches to standby mode. At this time, the system only maintains the operation of the basic monitoring circuit to minimize power consumption, waiting for the next light input to activate the workflow.

[0080] Taking a perovskite solar cell as an example, when the cell is exposed to light, a potential difference is generated at its output terminal. Due to the series resistance (Rs) within the cell, the potential difference decreases when the equivalent resistance (Ro) of the energy storage circuit connected to the output terminal is less than Rs. When Ro is much smaller than Rs, eventually reaching zero, the potential difference disappears, and the perovskite cell almost loses its power output capability. To solve this problem, an MPPT controller needs to be connected between the perovskite cell and the energy storage circuit to match the output resistance and prevent the potential difference from disappearing.

[0081] The equivalent resistance of the MPPT controller is adjustable. When Ro = Rs, the perovskite cell output power Pmax is at its maximum, and all the generated power is output to the energy storage circuit. Because the light signal illuminating the perovskite cell is modulated, the strongest light signal produces the maximum power P1, and the weakest light signal produces the minimum power P2. The value of Pmax fluctuates between P1 and P2 depending on the light signal. The value of Ro is further increased until the perovskite cell output power Po is less than P2. At this point, Pmax - Po = Ps. Since the value of Pmax fluctuates but its lower limit is always greater than P2, the fluctuation of Po is equal to the fluctuation of Pmax, i.e., PΔ. PΔ is input to the signal receiving module for signal playback.

[0082] In this application, the output of the perovskite solar cell is connected in parallel to the MPPT controller and the signal receiving module. When full energy storage is required, the MPPT controller is adjusted to Ro = Rs. When energy storage and signal reception are required simultaneously, the controller is adjusted to Ro > Rs.

[0083] The closer the "set value" is to the MPPT voltage, the lower the sensitivity, the higher the output impedance, and the more energy stored. The closer it is to the open-circuit voltage, the higher the sensitivity, the lower the output impedance, and the less energy stored. The above "set value" is set according to the characteristics of the optoelectronic device and the input impedance matching of the back-end circuit.

[0084] Slave processing unit: Used to decode the optical signal received by the slave receiving unit and output the decoded data information. Typically, the decoded data information is audio information. When a tourist is within range of a certain location, the slave device plays back the data sent from that location. Any number of slave devices are allowed within the same location range, and all can play the same audio data simultaneously. Additionally, at some special locations, text and image information are also included, which can be displayed synchronously on the slave device's screen while the audio is playing.

[0085] In addition, the slave unit also includes a slave storage unit, which stores the electrical energy converted from the optical signal and can replenish the power of the optoelectronic devices in the slave unit. The slave storage unit is located on the back of the slave unit, allowing the slave unit to obtain power from the light source during use. When the working time ends and the slave units are collected and stored, the storage area can continue to replenish the power of the slave units with light.

[0086] In scenic areas, tour guides or staff typically use a main unit. The guide is positioned within the effective range of the main unit, and their commentary covers all tourists within that range. The guide can also manually set up additional locations to stream commentary content via the main unit. The main unit acquires data and transmits it using optical signals. (See also...) Figure 4 The host terminal includes the following components:

[0087] Host acquisition unit: It can use a microphone to collect audio data information such as narration and control signals; the microphone also includes external audio pickup or playback devices, which transmit audio data to the host through analog or digital interfaces.

[0088] Main unit processing: Encodes and processes the audio data and control signals picked up by the microphone;

[0089] Main unit transmitter: Transmits encoded audio and control signals via optical signals to the effective area of ​​the designated location. When the main unit is within the range of a location, and the tour guide sets the playback of specific content at that location via the main unit, the main unit transmitter sends the control signal to the location. When the tour guide is giving a self-guided tour, the main unit transmitter sends the audio data encoded by the main unit processing unit to the location.

[0090] In this system, control information is typically sent proactively to play the narration content displayed at that location, enabling seamless switching between narration data and system data for collaborative control. This allows for efficient data transmission in team narration scenarios, improving the accuracy of information delivery.

[0091] The point-to-point transmitting unit and the main transmitting unit include light-emitting devices, such as LEDs, spotlights, or laser emitters. By modulating the light emitted by the light-emitting devices, data can be transmitted in response to changes in light intensity. The emitted light source can be integrated with ambient lighting. Modulation methods include intensity modulation, wavelength modulation, frequency modulation, and duty cycle modulation. The data includes, but is not limited to, voltage or current changes based on analog quantities, or digital signals encoded in any way.

[0092] When ambient lighting is not adjustable, invisible light sources can be used as an alternative to achieve the desired function. The technical principle of invisible light carrying data is the same as that of visible light; both encode data information through changes in the intensity, frequency, or phase of the light signal. The core reason for choosing invisible light transmission is to avoid power frequency interference from ambient lighting. This type of interference often originates from power frequency electric light sources such as everyday lighting, whose light signals exhibit specific frequency fluctuations that can severely affect the accuracy of visible light communication.

[0093] When ambient visible light interference is strong, invisible light transmission offers significant advantages. Taking 950nm infrared laser as an example: the transmitting end modulates data onto infrared light of that band for transmission; the receiving end is equipped with a precision optical filter, with the optical signal receiving port covered by a 950nm bandpass filter. This filter, based on the principle of optical interference or absorption, allows only 950nm infrared light to pass through, effectively blocking other wavelengths of light and interfering visible light. Furthermore, taking perovskite solar cells as another example, considering the typical light response wavelength range of perovskite, the wavelength range of invisible light sources is 850nm-1100nm. Therefore, the corresponding transmitting end wavelength range needs to be adjusted according to the type of solar cell selected.

[0094] At this point, the optoelectronic device, acting as a light receiving element, only receives data carried by light in that specific wavelength band, significantly reducing interference, improving the signal-to-noise ratio, and ensuring stable data transmission. However, due to the selective filtering of light bands by the bandpass filter, other light that can be used for photoelectric conversion cannot reach the optoelectronic device, causing it to be unable to perform conventional photoelectric conversion during the data reception phase, and temporarily disabling the charging function.

[0095] In summary, the present invention has the following advantages:

[0096] 1. By modulating the illumination range of the light-emitting device and physically isolating the data transmission area, the crosstalk problem of traditional wireless solutions is eliminated, and the "what you see is what you get" relationship between the explanation content and the visitor's location is achieved;

[0097] 2. The slave-side optoelectronic devices have both signal reception and power generation functions, supporting continuous power supply and offline power replenishment, completely solving the pain point of frequent device charging;

[0098] 3. It uses invisible light to transmit data, avoiding radio wave interference and leakage, making it suitable for confidential scenarios; the light source can be integrated with ambient lighting to improve scene adaptability.

[0099] The above specific embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A scenario-based intelligent broadcasting system, characterized in that, include: Point terminal: used to receive data information and transmit the data information by carrying optical signals in different optical bands in the range of 850nm-1100nm; the point terminal achieves data transmission isolation at different points by controlling the coverage of the light source; the coverage of the optical signal is set by adjusting the emission angle and blocking the light for a single light source; Slave terminal: Receives the optical signal from the location terminal, selects the target receiving band by changing the bandpass filter to extract the optical signal carrying the data information, decodes it to obtain the data information; and converts the received optical signals into electrical energy to provide power to the slave terminal. The slave terminal includes a slave optoelectronic device, the output of which is connected in parallel to an MPPT controller. Low-power energy storage is achieved during data reception by dynamically adjusting the equivalent load and the cyclic timer. When full-power energy storage is required, the MPPT controller is adjusted so that the equivalent load Ro = series resistance Rs. When energy storage and data reception are required simultaneously, Ro is adjusted to > Rs. When the slave optoelectronic device receives light input, it generates an open-circuit voltage. At this time, the charging controller in the receiving end is triggered to start full-power energy storage. The voltage of the slave optoelectronic device drops to the MPPT voltage, and a loop timer is started to trigger signal detection. After a period of time, the signal detection is triggered, energy storage is paused, and the optoelectronic device restores its open-circuit voltage to improve the signal-to-noise ratio. At this time, the controller determines whether there is a signal input. If not, it restores full-power energy storage until the next signal detection is triggered. If there is a signal input, the controller reduces the energy storage power, restores the optoelectronic device voltage to a "set value" higher than the MPPT voltage, and starts receiving data. If the fluctuation amplitude of the light signal is lower than the preset threshold, the controller determines that there is no valid signal, the system exits the data receiving mode, and returns to the cycle of energy storage and signal detection; when the optoelectronic device completely loses light, the system detects no energy input and automatically switches to standby mode, only maintaining the operation of the basic monitoring circuit to minimize power consumption, and waits for the next light input to activate the workflow. Host end: Used to send optical signals carrying data information to the point end; Server: The point terminal, host terminal and slave terminal are connected to the server via an Ethernet bus.

2. The scenario-based intelligent broadcasting system according to claim 1, characterized in that, The point terminal includes: Point receiving unit: used to receive data information from the host or data information sent by the server, or data information from the host and data information sent by the server; Point processing unit: used to decode the received data information and generate an optical signal carrying the data based on the decoded information; Point-to-point transmission unit: used to transmit the optical signal generated by the point-to-point processing unit.

3. The scenario-based intelligent broadcasting system according to claim 1, characterized in that, The data information is selected from at least one of multimedia data and control information.

4. The scenario-based intelligent broadcasting system according to claim 1, characterized in that, The host terminal includes: Host acquisition unit: Used to collect data information; Host processing unit: Used to encode the data information picked up by the host acquisition unit, and to preprocess, extract features, and encrypt the data information; Main unit transmitting: Used to transmit data information to the effective area of ​​the point location via optical signals.

5. The scenario-based intelligent broadcasting system according to claim 1, characterized in that, The slave device also includes: Slave receiving unit: used to receive the optical signal from the point terminal; Slave processing unit: used to decode the optical signal received by the slave receiving unit and output the decoded data information.

6. The scenario-based intelligent broadcasting system according to claim 5, characterized in that, Also includes: Slave energy storage unit: used to store electrical energy converted from optical signals and to supply power to the slave device.

7. The scenario-based intelligent broadcasting system according to claim 5, characterized in that, The slave optoelectronic device is selected from: perovskite solar cells, silicon solar cells, polycrystalline thin-film solar cells, organic polymer solar cells, nanocrystalline solar cells, organic thin-film solar cells, dye-sensitized solar cells, plastic solar cells, novel perovskite-derived solar cells, compound semiconductor solar cells, or tandem solar cells.

8. The scenario-based intelligent broadcasting system according to claim 1, characterized in that, The light signal is emitted through a light-emitting device, which is selected from LEDs, spotlights, or laser emitters.

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