Data transmission method of intelligent broadcast

Abstract

The invention relates to the technical field of intelligent broadcasting, in particular to a data transmission method for intelligent broadcasting, which comprises the following steps of: presetting a point location in a scene, and receiving data information issued by a server through the point location; after processing the data information, carrying the data information through an optical signal and sending the data information; the receiving end receives and extracts the optical signals carrying the data information, and converts the received various optical signals into electric energy to charge receiving end equipment; and decoding the extracted optical signal to obtain data information. The problems of interference control, content maintenance and energy management existing in a traditional broadcasting system are solved, and the system is particularly suitable for application scenes with high requirements for information safety and equipment endurance.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent broadcasting, and in particular relates to a data transmission method for intelligent broadcasting. Background Art

[0002] Common wireless data transmission methods include radio broadcasting, Bluetooth or WiFi and other technical solutions. In actual applications, the corresponding selection will be based on the scenario. For example, Bluetooth is selected for point-to-point audio transmission, WiFi is selected for data transmission with high bandwidth requirements, and radio broadcasting may be selected for walkie-talkies.

[0003] During one-to-many audio transmission, beacons will interfere with each other, causing misaligned audio triggering and playback; at the same time, the built-in content management in the receiver is very complicated, making updates and maintenance very difficult; when a large number of beacons and receiver devices appear, the workload and cost of battery replacement and management are extremely high.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems existing in the prior art, the present invention provides a data transmission method for intelligent broadcasting, which solves the problems of interference control, content maintenance and energy management existing in traditional broadcasting systems, and is particularly suitable for application scenarios with high requirements on device battery life.

[0006] To achieve the above object, the technical solution of the present invention is as follows: A data transmission method for intelligent broadcasting, comprising: S1. Pre-set points in the scene and receive data information sent by the server through the points; S2. After processing the data information, an optical signal carrying the data information is sent through a transmitting end; S3, the receiving end receives and extracts the optical signal carrying the data information, and converts the received optical signals into electrical energy to charge the optoelectronic device of the receiving end; S4. Decode the optical signal carrying the data information to obtain the data information.

[0007] Furthermore, the data information includes: multimedia data or control information, or multimedia data and control data.

[0008] Furthermore, the data information received at the point also includes information transmitted by the acquisition device, specifically including: The acquisition device enters the point and acquires the surrounding multimedia data through the built-in acquisition module; the acquisition device can generate control instructions through manual settings and encode the collected multimedia data and control instructions; and transmits the encoded information data to the point through optical signals.

[0009] Furthermore, the optical signal is transmitted to the effective area through a light emitting device; the light emitting device includes: an LED lamp, a spotlight or a laser transmitter.

[0010] Furthermore, the effective area is generated by controlling the emission angle, illumination intensity, wavelength, luminous time, luminous frequency or modulation mode of the light-emitting device.

[0011] Furthermore, the specific steps of the data information processing include: The analog signal is subjected to DC offset processing, and the processed signal is connected to the base of the equivalent transistor. The transistor controls the current flowing to the light source, and the emission power change curve of the light source is matched with the analog signal curve.

[0012] Furthermore, when transmitting the analog signal, the method further includes: performing AM carrier modulation on the analog signal, and the AM carrier modulation includes: filtering, amplifying or pre-emphasizing the analog signal.

[0013] Furthermore, the optical signal sending includes: The data bits "0" and "1" in the signal correspond to low and high levels respectively. After DC offset processing, the high and low levels are used as the driving signal of the light source, so that the transmission power varies with the data bits "0" and "1".

[0014] Furthermore, the data information processing is to decode the received data information and generate an optical signal carrying the data based on the decoded information.

[0015] Furthermore, the receiving end optoelectronic device is one or more of the following cells: perovskite 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, new perovskite-derived cells, compound semiconductor solar cells or stacked cells.

[0016] Compared with the prior art, the data transmission method for intelligent broadcasting provided by the present invention adopts optical signals for data transmission. The directionality and controllability of optical signal propagation can reduce signal interference, thereby solving the problem of beacon crosstalk and audio misalignment triggering playback in one-to-many audio transmission. Data information is sent down by the server, and the data information includes multimedia data or control information. The centralized data management method is simpler than the built-in content management of the receiver. The data is updated and maintained uniformly by the server, which reduces the complexity of content management on the receiver side and solves the problem of difficulty in updating and maintenance. At the same time, the receiving end can convert the various received optical signals into electrical energy to charge the optoelectronic devices on the receiving end, which can reduce the dependence on battery replacement, reduce the workload and cost of battery replacement and management, and is suitable for scenarios with a large number of beacons and receiver devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A flowchart of a data transmission method for intelligent broadcasting provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] It should be noted that, unless otherwise specifically stated, the relative arrangements of components and steps, and numerical expressions set forth in these embodiments should not be construed as limiting the scope of the present invention.

[0020] The following description of exemplary embodiments is merely illustrative and is not intended to limit the present invention, its application, or use in any sense. Technologies, methods, and apparatus known to those skilled in the art may not be discussed in detail herein, but to the extent applicable, such technologies, methods, and apparatuses should be considered part of this specification.

[0021] See Figure 1 , Figure 1 This is a flow chart of a data transmission method for intelligent broadcasting proposed by the present invention. This method can be applied to any scenario requiring optical signal data transmission and energy self-supply. The data transmission method is completed through a transmitter, a receiver, and a server. Specifically, it may include: S1: Point receiving data information Pre-set locations in the scene. The receiving end at each location receives server data via an Ethernet bus, supporting batch distribution and real-time updates. The receiving end at each location can also receive actively collected data. A collection device enters the location and uses a built-in collection module to capture surrounding multimedia data. The collection device can use a microphone or camera to capture audio and image data from the surrounding environment, converting it into digital signals via A / D conversion. This multimedia data can include, but does not include, audio and video files encoded in MPEG-4 or AAC standards, or graphic data in JPEG or PNG formats.

[0022] The acquisition device can generate control instructions through manual settings or voice settings, and generate control instructions through device buttons or touch screens; control instructions include: device address, instruction code (such as 0x01 for play, 0x02 for pause), parameter value (such as volume threshold, light intensity setting value); the collected multimedia data and manual instructions are encoded by the point central processor, merged and stored with the data sent by the server, and the encoded information data is transmitted to the location through optical signals.

[0023] S2: Optical signal carries data information and sends The specific process of data processing includes: The input analog signal (such as the 0.1V-2V audio signal output by a microphone) is superimposed with a 0.5V bias through a DC offset circuit (resistor voltage divider network) to obtain a biased signal of 0.6V-2.5V. The signal is connected to the base of an equivalent transistor (NPN type, β=100), and the collector current (5mA-100mA) is linearly controlled by the base current (0.05mA-1mA), thereby adjusting the power of the light-emitting device (for example, the power of an LED lamp increases from 5mW to 100mW with current), so that the emission power curve strictly matches the amplitude of the analog signal.

[0024] It also includes AM carrier modulation, which can improve anti-interference performance by AM carrier modulation, specifically including: selecting carrier frequency , modulation index , the biased analog signal is multiplied by the carrier signal through a multiplier to generate an amplitude modulated signal; the amplitude modulated signal drives the light-emitting device, so that the amplitude of the optical signal changes according to the "carrier frequency ± modulation signal frequency" rule, thereby improving the ability to resist ambient light interference.

[0025] The data bits "0" and "1" in the signal are mapped to low and high levels respectively. After DC offset processing, the high and low levels are used as driving signals for the light source, so that the transmission power varies with the data bits "0" and "1", and the optical signal carrying the data information is sent through the transmitter.

[0026] The light source that provides the optical signal is emitted by a point-to-point light-emitting device, which dynamically adjusts its lighting parameters based on the scene requirements. Light-emitting devices include LEDs, spotlights, or laser emitters, which transmit visible light to carry data. They also include invisible light sources, such as infrared lasers in the 950-1100nm range.

[0027] S3: Receiver receives optical signals and manages energy When a perovskite cell is exposed to light, a potential difference is generated at its output terminal. Due to the presence of resistor Rs in the cell, this potential difference decreases when the equivalent resistance Ro of the energy storage circuit connected to the output terminal is less than Rs. When Ro becomes significantly less than Rs, reaching zero, the potential difference disappears, and the perovskite cell virtually loses its power output capability. To address this issue, an MPPT controller must be connected between the perovskite cell and the energy storage circuit to match the output resistance and prevent the potential difference from disappearing.

[0028] The MPPT controller's equivalent resistance is adjustable. When adjusted to Ro = Rs, the perovskite cell's output power, Pmax, reaches its maximum, with all generated power being delivered to the energy storage circuit. Because the light signal striking the perovskite cell is modulated, the strongest light signal produces the maximum power, P1, while the weakest light signal produces the minimum power, P2. Pmax fluctuates between these two values ​​as the light signal changes.

[0029] Continue to increase the value of Ro 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 necessarily greater than P2, the fluctuation of Po is equal to the fluctuation of Pmax, that is, PΔ. PΔ enters the signal receiving module for signal playback.

[0030] In this application, the output of the perovskite battery 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, the controller is adjusted to Ro > Rs.

[0031] The receiving end receives and extracts the optical signal carrying the data information. The receiving device at the receiving end uses a perovskite cell; it can also use one or more of 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, new perovskite-derived cells, compound semiconductor solar cells, or stacked cells to convert the various received optical signals into electrical energy to charge the optoelectronic devices at the receiving end. Specifically, it includes: This generates an open-circuit voltage, triggering the charge controller in the receiving end to begin full-power energy storage. Simultaneously, the photovoltaic device voltage drops to the MPPT voltage, and a cycle timer is started to trigger signal detection. After a period of time, signal detection is triggered, energy storage is suspended, and the photovoltaic device returns to open-circuit voltage to improve the signal-to-noise ratio. The controller then determines whether there is a signal input. If not, full-power energy storage is resumed until the next signal detection is triggered. If there is a signal input, the controller reduces the energy storage power, restores the photovoltaic device voltage to a value above the MPPT voltage, and begins receiving data.

[0032] If the light signal fluctuation amplitude falls below a preset threshold, the controller determines that there is no valid signal, and the system exits data reception mode, returning to the energy storage and signal detection cycle. If the photoelectric device completely loses light, the system detects a lack of energy input and automatically switches to standby mode. At this point, the system maintains only basic monitoring circuitry, minimizing power consumption while awaiting the next light input to activate the workflow.

[0033] Taking perovskite cells as an example, when a perovskite cell is exposed to light, a potential difference is generated at its output terminal. Due to the presence of resistor Rs in the cell, this potential difference decreases when the equivalent resistance Ro of the energy storage circuit connected to the output terminal is less than Rs. When Ro becomes significantly less than Rs, reaching zero, the potential difference at the output terminal disappears, and the perovskite cell almost loses its power output capability. To address this issue, an MPPT controller must be connected between the perovskite cell and the energy storage circuit to match the output resistance and prevent the potential difference at the output terminal from disappearing.

[0034] The MPPT controller's equivalent resistance is adjustable. When Ro = Rs, the perovskite cell's output power, Pmax, reaches its maximum, with all generated power being output to the energy storage circuit. Because the light signal irradiating the perovskite cell is modulated and fluctuating, the strongest light signal produces the maximum power, P1, while the weakest light signal produces the minimum power, P2. Pmax fluctuates between P1 and P2 as the light signal changes. Continue increasing Ro until the perovskite cell's output power, Po, falls below P2. At this point, Pmax - Po = Ps. Since Pmax fluctuates but its lower limit is always greater than P2, the fluctuation of Po equals the fluctuation of Pmax, or PΔ. PΔ enters the signal receiving module for signal playback.

[0035] In this application, the output of the perovskite battery 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, the controller is adjusted to Ro > Rs.

[0036] The closer the "set value" is to the MPPT voltage, the lower the sensitivity, the greater the output impedance, and the more energy stored. The closer it is to the breakout voltage, the higher the sensitivity, the smaller the output impedance, and the less energy stored. Set the "set value" based on the characteristics of the optoelectronic device and the input impedance matching of the back-end circuit.

[0037] S4. Optical signal data extraction The optical signal decoding includes: the received analog optical signal is converted into a voltage signal by the optoelectronic device, and then passed through a high-pass filter (cut-off frequency , filtering out the 50Hz power frequency interference), then passing through the envelope detection circuit, and extracting the AM signal envelope through a diode and RC low-pass filter; the envelope signal is restored to the original analog signal after the DC offset is removed, such as the audio signal, which is input into the D / A converter to drive the speaker for playback.

[0038] The received digital optical signal is rectified by a Schottky diode in a rectifier circuit to produce a pulsating DC voltage. This voltage is then converted to a TTL level based on a set threshold by a threshold comparator. A value greater than the set threshold is interpreted as "1," and a value less than the set threshold is interpreted as "0." The level sequence is decoded by a decoding algorithm, using Manchester decoding or CRC checksum to recover the original data bits and output them to the interactive unit for display. The simultaneous implementation of data reception and power conversion through optoelectronic devices reduces the device's reliance on traditional batteries and addresses battery management issues for a wide range of devices.

[0039] In real-world scenarios, the energy difference between direct light and ambient reflected light typically exceeds an order of magnitude. For example, during digital communication, direct light can generate a 3.3V TTL signal at the perovskite output for edge triggering. However, the signal generated by diffuse light will not exceed 0.33V, failing to generate a clear trigger signal and thus not interfering with the system. During analog output, the voltage level of the direct main signal differs by more than 10 times from that of the diffuse signal, resulting in a loudness difference exceeding 20dB. This means that the main signal is four times louder than the interference signal, barely affecting audibility. Signal interruption due to occlusion is unavoidable, and the battery surface must be exposed to light during use.

[0040] In summary, the present invention has the following advantages: 1. Use optical signals to transmit data and adjust the effective range of the optical signals to avoid crosstalk between beacons and ensure accurate audio playback in one-to-many audio transmission scenarios; 2. By sending multimedia data or control information and other data information through the server, centralized management is achieved, which reduces the complexity of content management and the difficulty of update and maintenance at the receiving end; 3. Reduce dependence on battery replacement and significantly reduce the workload and cost of battery replacement and management in scenarios with a large number of beacons and receiver devices.

[0041] The above specific embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A data transmission method for intelligent broadcasting, characterized in that: include: S1. Pre-set points in the scene and receive data information sent by the server through the points; S2. After processing the data information, an optical signal carrying the data information is sent through a transmitting end; S3, the receiving end receives and extracts the optical signal carrying the data information, and converts the received optical signals into electrical energy to charge the optoelectronic device of the receiving end; S4. Decode the optical signal carrying the data information to obtain the data information.

2. The data transmission method of intelligent broadcasting according to claim 1, characterized in that: The data information includes: multimedia data or control information, or multimedia data and control data.

3. The data transmission method of intelligent broadcasting according to claim 1, characterized in that: The data information received at the point also includes information transmitted by the acquisition device, specifically including: The acquisition device enters the point and acquires the surrounding multimedia data through the built-in acquisition module; the acquisition device can generate control instructions through manual settings and encode the collected multimedia data and control instructions; and transmits the encoded information data to the point through optical signals.

4. The data transmission method of intelligent broadcasting according to claim 1, characterized in that: The optical signal is transmitted to the effective area through a light emitting device; the light emitting device includes: an LED lamp, a spotlight or a laser transmitter.

5. The data transmission method of intelligent broadcasting according to claim 4, characterized in that: The effective area is generated by controlling at least one of the emission angle, illumination intensity, wavelength, luminous time, luminous frequency or modulation mode of the light-emitting device; the modulation mode includes amplitude modulation, frequency modulation or pulse code modulation.

6. The data transmission method of intelligent broadcasting according to claim 1, characterized in that: The specific steps of the data information processing include: The analog signal is subjected to DC offset processing, and the processed signal is connected to the base of the equivalent transistor. The transistor controls the current flowing to the light source, and the emission power change curve of the light source is matched with the analog signal curve.

7. The data transmission method of intelligent broadcasting according to claim 6, characterized in that: When transmitting the analog signal, the method further includes: performing AM carrier modulation on the analog signal, and the AM carrier modulation includes: filtering, amplifying or pre-emphasizing the analog signal.

8. The data transmission method of intelligent broadcasting according to claim 1, characterized in that: The optical signal transmission includes: The data bits "0" and "1" in the signal correspond to low and high levels respectively. After DC offset processing, the high and low levels are used as the driving signal of the light source, so that the transmission power varies with the data bits "0" and "1".

9. The data transmission method of intelligent broadcasting according to claim 1, characterized in that: The data information processing is to decode the received data information and generate an optical signal carrying the data based on the decoded information.

10. The data transmission method of intelligent broadcasting according to claim 1, characterized in that: The receiving end optoelectronic device is one or more of the following cells: perovskite cell, silicon solar cell, polycrystalline thin film solar cell, organic polymer solar cell, nanocrystalline solar cell, organic thin film solar cell, dye-sensitized solar cell, plastic solar cell, new perovskite derivative cell, compound semiconductor solar cell or stacked cell.

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