Omnidirectional underwater optical communication experiment platform

Abstract

An omnidirectional underwater optical communication experiment platform disclosed by the present invention comprises an underwater communication system and a bionic jellyfish underwater experiment platform, the underwater communication system comprises a transmitting device, a receiving device and a communication main body, the communication main body transmits a to-be-sent signal to the transmitting device, the transmitting device modulates and converts an electric signal into an optical signal and then sends the optical signal, and the receiving device receives the optical signal and sends the optical signal to the bionic jellyfish underwater experiment platform. The receiving device receives the optical signal, restores the optical signal into an electric signal and transmits the electric signal to the communication main body. According to the invention, the LED array structure with the redundant fault-tolerant characteristic is combined with the annular convergent lens, so that the emission uniformity and the direction coverage range of communication signals are improved, and the propagation performance and the stability of the system in an underwater environment are also obviously optimized. According to the platform, the bionic jellyfish is used as a motion carrier, a dual-drive propelling system with a flexible fin ray and a paper folding structure is combined, free motion and posture adjustment are supported, and the communication system has the dynamic direction self-adaptive capacity.

Description

Technical Field

[0001] This invention belongs to the field of underwater wireless communication, specifically relating to the design of a biomimetic jellyfish experimental platform that can be used for underwater omnidirectional optical communication. Background Technology

[0002] Underwater communication technology is a core technology for ensuring the efficiency and accuracy of underwater equipment operations. Due to the limitations of underwater channels, communication methods using electromagnetic or acoustic waves as media have severely restricted performance in terms of communication rate and modulation bandwidth. In contrast, underwater optical communication technology offers advantages such as low energy consumption, high security, large bandwidth, low latency, and high communication speed. Furthermore, blue-green light with wavelengths in the range of 450-570nm exhibits excellent performance during underwater propagation. Therefore, optical communication is currently the most valuable and promising technology in the field of underwater wireless communication.

[0003] Currently, underwater optical communication technology is mainly divided into two forms: LD-based and LED-based. LD laser sources have advantages such as concentrated energy, fast response speed, and long transmission distance underwater, but they also have disadvantages such as small beam divergence angle and high alignment difficulty. Therefore, the development of LD optical communication technology mainly focuses on the research and development of alignment systems. Although LED-based optical communication technology has weak light intensity and short transmission distance, it has a large beam divergence angle, which significantly reduces the alignment difficulty and is suitable for complex underwater environments. Therefore, the development of LED optical communication technology mainly focuses on increasing optical power and extending transmission distance. At the same time, in order to meet the actual application needs of underwater communication, it is necessary to select a suitable underwater experimental platform as a carrier that can move freely underwater to complete communication tasks. Summary of the Invention

[0004] To address the problems of existing LED underwater optical communication systems, such as single communication direction, low transmission power utilization efficiency, susceptibility to divergence interference, and poor communication stability, this invention proposes an experimental platform for underwater omnidirectional optical communication. Through systematic structural innovation, it achieves a high degree of integration between extended communication distance, uniform signal coverage, and underwater platform movement, providing an effective technical path for real-time and accurate communication in complex underwater environments.

[0005] This invention employs an LED array structure with redundancy and fault tolerance, combined with a secondary light distribution lens unit, to effectively improve the uniformity of light intensity and communication stability within a unit space while maintaining an appropriate beam divergence angle. Unlike traditional methods that increase the power of individual LEDs, this invention enhances the overall optical power output of the system through a series-parallel hybrid design, and ensures that the system can still operate stably even if some LED units fail, significantly improving the system's robustness and reliability.

[0006] Furthermore, this invention employs an equidistant, ring-shaped arrangement of light sources, achieving 360° omnidirectional coverage in the horizontal plane, effectively solving the problem of frequent alignment required in underwater multi-target communication. Simultaneously, the accompanying receiving equipment, through the design of photoelectric detection elements, signal processing modules, and a sealed glass cover structure, enhances the detection capability for weak signals and the system's anti-interference ability.

[0007] The platform is mounted on a self-designed biomimetic jellyfish underwater experimental platform. This platform utilizes a dual-drive mechanism of flexible fins and origami-like structures to achieve flexible underwater propulsion and directional control, and a center-of-gravity adjustment structure assists in steering. The optical communication system and platform control system are integrated within a sealed cabin, and a darkroom structure is installed on the top of the platform to isolate ambient light interference, ensuring the clarity and controllability of the communication signal.

[0008] The comprehensive technical solution of the present invention is as follows:

[0009] An omnidirectional underwater optical communication experimental platform is disclosed. The platform includes an underwater communication system and a biomimetic jellyfish underwater experimental platform. The underwater communication system, mounted on the experimental platform, includes a transmitting device, a receiving device, and a communication main body. The communication main body transmits the signal to be sent to the transmitting device. The transmitting device converts the electrical signal into an optical signal and transmits it to the receiving device through an underwater channel. The receiving device converts the optical signal back into an electrical signal and transmits it back to the communication main body.

[0010] The underwater communication system includes a transmitting device, a receiving device, and a communication main body. The communication main body transmits the signal to be sent to the transmitting device, the transmitting device modulates the electrical signal into an optical signal and then sends it, and the receiving device receives the optical signal and restores it to an electrical signal and sends it back to the communication main body.

[0011] Preferably, the transmitting device includes a watertight housing, inside which is provided an LED array light source with a series-parallel hybrid redundancy design, a signal amplification module, a voltage bias module, and a light source driving circuit. The LED array light source can maintain the integrity of the communication link while ensuring the overall transmission power and in the event of partial light source failure.

[0012] Furthermore, the transmitting device includes a watertight housing, inside which is a large-scale LED array light source with a series-parallel hybrid structure, a signal amplification module, a voltage biasing module, and a light source driving circuit. A secondary light distribution lens assembly is installed at the front end of the housing for collimating and shaping the light signal, and also serves as a watertight device.

[0013] Preferably, the transmitting device converts the electrical signal into a modulated optical signal through the signal amplification module, voltage bias module and light source driving circuit, and then performs multi-directional high uniformity emission through the optically shaped LED array light source to achieve omnidirectional underwater optical signal coverage.

[0014] Preferably, the receiving device includes a watertight housing, with a photoelectric detection element at one end and a communication interface at the other end. The housing contains a photoelectric detection element, a high-speed current-voltage conversion module, and a filtering module.

[0015] Preferably, the transmitting equipment adopts a spatially uniform layout. Based on the spatial coverage angle range of a single transmitting equipment, the transmitting equipment units are arranged at equal intervals within a circumference to cover all areas within the space.

[0016] Preferably, the biomimetic jellyfish underwater experimental platform adopts a dual-drive structure of flexible fins and origami mechanism to achieve flexible underwater movement, and adopts a center of gravity adjustment structure to achieve underwater steering. The microcontroller is placed in a sealed cabin to be responsible for the motion control of the jellyfish experimental platform and the signal control of the optical communication system.

[0017] Preferably, the biomimetic jellyfish experimental platform is designed with a darkroom.

[0018] Preferably, the transmitting device is connected to a dynamic power adjustment module, which is used to adjust the luminous power of the LED array light source or the number of activated units according to the communication distance, platform attitude or signal feedback. The receiving device feeds back the received strength information to the transmitting device through the signal strength detection module, which is used to dynamically adjust the transmission strategy.

[0019] Preferably, multiple experimental platforms can be synchronously controlled and networked through a unified communication protocol, which is suitable for underwater cluster or networked detection missions.

[0020] This invention achieves high stability, high directional coverage, and platform adaptability in underwater optical communication through innovative designs in multiple dimensions, including light source structure, system layout, platform motion control, and system integration, providing strong support for future marine exploration, underwater formation communication, and intelligent underwater networks.

[0021] The technical advantages of this invention are as follows:

[0022] This invention addresses the challenges of limited emission angle, uneven light intensity distribution, and high risk of single-point failure in underwater communication using LED light sources. It proposes a multi-module hybrid LED array integrated structure with lens shaping. This structure not only improves the system's illumination intensity and emission uniformity but also provides module-level redundancy, ensuring continued normal communication even if a single light source fails. Integration with an optical converging lens effectively compresses the divergence angle, increasing the effective illumination distance and communication stability. Furthermore, this structure matches the movement of a biomimetic jellyfish, achieving omnidirectional dynamic illumination coverage and significantly enhancing the adaptability and anti-interference capabilities of communication in multi-directional interactions. This provides a preliminary technical means for constructing underwater detection technology platforms and realizing underwater clusters. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an LED array light source circuit in one embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of a light source driving circuit in one embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the fin structure in one embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of a flexible fin structure in one embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of a paper-folding drive structure model in one embodiment of the present invention;

[0028] Figure 6 A schematic diagram of a paper-folding unit model in one embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of an underwater omnidirectional optical communication experimental platform inspired by a jellyfish, according to one embodiment of the present invention.

[0030] Figure 8 This is a schematic diagram of the structure of a single optical communication system including a transmitter and a receiver in one embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the spatial distribution of the LED communication system on a jellyfish-inspired experimental platform in one embodiment of the present invention;

[0032] Figure 10 This is a spatial light intensity distribution of the transmitting device of an optical communication system under different array structures in one embodiment of the present invention. Detailed Implementation

[0033] The following will refer to the appendix. Figures 1 to 10 Specific embodiments of this disclosure are described in detail. While specific embodiments of this disclosure are shown in the accompanying drawings, it should be understood that this disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0034] It should be noted that certain terms are used in the specification and claims to refer to specific components. Those skilled in the art will understand that different terms may be used to refer to the same component. This specification and claims do not distinguish components based on differences in terminology, but rather on differences in function. The terms "comprising" or "including" used throughout the specification and claims are open-ended and should be interpreted as "comprising but not limited to." The following descriptions are preferred embodiments for carrying out this disclosure; however, these descriptions are for the purpose of understanding the general principles of the specification and are not intended to limit the scope of this disclosure. The scope of protection of this disclosure is determined by the appended claims.

[0035] To facilitate understanding of the embodiments of this disclosure, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. The accompanying drawings do not constitute a limitation on the embodiments of this disclosure.

[0036] To achieve the objectives of this invention, an omnidirectional underwater optical communication experimental platform is proposed. This platform integrates an underwater communication system and a biomimetic jellyfish experimental platform, realizing multi-module collaborative omnidirectional optical communication functionality. It features innovative characteristics such as directional self-adaptation, strong signal robustness, and high platform dynamic adaptability. The experimental platform includes an underwater communication system and a biomimetic jellyfish underwater experimental platform. The underwater communication system includes a transmitting device, a receiving device, and a communication main body. The communication main body transmits the signal to be sent to the transmitting device, which converts the electrical signal into an optical signal. The receiving device receives the optical signal, converts it back into an electrical signal, and transmits it to the communication main body. Unlike traditional underwater optical communication platforms, this invention, for the first time, integrates a redundant LED array light source, a collimating lens, and a biomimetic flexible drive mechanism into a system design, achieving coordinated optimization of structure, communication, and motion. The platform supports complex task scenarios involving communication while moving, possesses high adaptability and scalability, and is suitable for advanced application fields such as multi-node networking, distributed collaboration, and underwater detection.

[0037] In one embodiment, the transmitting device includes a highly sealed watertight housing, and the housing contains a redundant LED array light source, such as... Figure 1 As shown, each diode is connected in series with a voltage regulator, and every two diodes form a group. These diodes are used as LEDs, emitting light when current flows through them. After every two LEDs are connected in series, the positive terminal is connected to the output of the voltage regulator, and the negative terminal is grounded. The input (IN) of each voltage regulator is connected to a 12V power supply. The output (OUT) is connected to one end of the corresponding resistor (R1-R3) and the diode group. The adjustment terminal (ADJ) is connected to the other end of the corresponding resistor (R1-R3) and ground.

[0038] This structure is designed to enhance system optical power output while improving system stability in the event of partial light source failure. Compared to traditional simple stacked LED light sources, this array structure improves energy utilization efficiency while introducing a structural fault-tolerant mechanism, significantly enhancing the robustness of the communication system.

[0039] To optimize the spatial distribution and collimation of the emitted light, the LED array of this invention is equipped with a multi-layer converging lens unit at its front end. This lens unit is functionally divided into a primary collection layer and a secondary shaping layer. The primary collection layer corresponds one-to-one with a single LED unit, maximizing the collection of primary luminous energy through microlenses or TIR structures. The secondary shaping layer uses aspherical or freeform surface large-aperture converging lenses to synthesize the primary beam into the desired angular distribution and reduce overall divergence. The multi-layer converging lens unit of this invention can provide a highly directional and uniformly distributed light field in the horizontal plane for redundant LED arrays without relying on mechanical rotation, thereby improving reception stability and effective communication distance in complex underwater scattering channels. In the communication system, the signal output from the host computer is modulated by an arbitrary waveform generator, enters the signal amplification and voltage biasing module, and then drives the LED array light source by the light source driving circuit. The light source driving circuit uses MOS transistor switching control, possessing a high response rate and high-efficiency electrical signal to light conversion mechanism. The combined design of the LED array structure and lens system ensures that even with changes in platform attitude, the light signal can be stably pointed to the receiving device in any horizontal direction.

[0040] In another embodiment, such as Figure 2 As shown, the light source driving circuit uses a MOSFET to control the LED array light source. One end of the LED is connected to a DC power supply, and the other end is connected to the drain of the MOSFET. During high-speed communication, this circuit supports fast response and stable dimming, ensuring the integrity and consistency of the signal light output. It has good response time control capability in dynamic environments, which is conducive to realizing simultaneous communication and control during platform movement.

[0041] Operating procedure: When the input is high, the source and drain of the MOSFET are turned on, and the LED array is lit; when the input is low, the source and drain of the MOSFET are turned off, the negative voltage of the LED array is pulled high, and the LED does not emit light. An optical lens is installed at the front end of the LED array light source, which serves two purposes: collimating and shaping the light, and sealing it with the housing as a watertight device; the communication interface of the transmitting device is located on the fixing part connected to the communication body, and both the transmitting device and the communication body are sealed.

[0042] In another embodiment, the receiving device includes a watertight housing. A photoelectric detection element is disposed at one end of the housing, and a communication interface is disposed at the other end. The housing contains a high-sensitivity photoelectric detection element, a high-speed current-to-voltage conversion module, and a filtering module. The photoelectric detection element receives the optical signal in the underwater channel, converts the optical signal into a current signal, and transmits it to the lower-level computer of the receiving body after passing through the high-speed current-to-voltage conversion amplification module and the low-pass filtering module. The received signal is demodulated and decoded, and the communication process is completed. A glass cover is disposed above the photoelectric detection element, and the housing and the cover are sealed. The communication interface of the receiving device is disposed on the fixing part connected to the communication body, and the receiving device and the communication body are sealed.

[0043] In another embodiment, in order to meet the requirements of omnidirectional communication, the integrated transmitting equipment adopts a spatially evenly distributed layout. Based on the spatial coverage angle range of a single transmitting equipment, the transmitting equipment units are arranged in an equidistant manner within the circumference to cover all areas in the space.

[0044] To further improve the energy efficiency and adaptability of the communication system, the platform is equipped with a dynamic power adjustment module. This module automatically adjusts the operating power of the LED array or the number of activated units based on the current communication distance, changes in the system's own attitude angle, or signal reception quality. The dynamic power adjustment module uses a microcontroller to read sensor data (e.g., IMU module, communication feedback signals) to determine the required transmission direction and communication load, deciding whether to enable full-power transmission or only activate a portion of the array in a specific direction. This reduces unnecessary energy consumption while meeting communication requirements. In one embodiment, when the communication distance between two biomimetic jellyfish experimental platforms is less than 3 meters, the dynamic power adjustment module activates only two adjacent LED units in the ring array and reduces the drive current to 30%. This ensures that the optical signal intensity at the receiving end is greater than -25 dBm, meeting reliable communication requirements. Compared to always operating at full power, dynamic power adjustment reduces energy consumption per mission by approximately 60%. When the communication distance increases to more than 8 meters, the module automatically activates all LED units and increases the drive current to 90%, ensuring that the signal-to-noise ratio at the receiving end remains above 20 dB, thus maintaining stability for long-distance communication. In another embodiment, when the experimental platform deflects by 15° due to water flow, the transmitting unit originally facing the receiver shifts, causing a decrease in signal strength at the receiver by approximately 40%. The dynamic power adjustment module, detecting the platform deflection via an attitude sensor, automatically activates a backup LED unit in the adjacent direction while simultaneously reducing the power of the original LED unit, achieving dynamic compensation of the beam coverage area. A signal strength detection module is added to the receiving device, enabling real-time measurement of the received optical signal intensity and transmission to the transmitting control system via a feedback link. After analyzing the feedback signal, the communication entity can dynamically adjust the transmission power, modulation parameters, or transmitting unit arrangement to achieve closed-loop adjustment and robustness enhancement of the communication link. This mechanism is suitable for unstable channel scenarios such as long-distance travel and water flow disturbances.

[0045] Some jellyfish in nature possess phototaxis, therefore, using a biomimetic jellyfish as an experimental platform for underwater optical communication aligns with biomimetic principles. The biomimetic jellyfish experimental platform employs a dual-drive structure of flexible fins and a folding mechanism to achieve flexible underwater movement, and a center-of-gravity adjustment structure for underwater steering. A microcontroller, housed in a sealed chamber, is responsible for the motion control of the jellyfish experimental platform and the signal control of the optical communication system. When the communication distance or platform attitude angle changes, the microcontroller automatically adjusts the luminous power of the LED array or activates different array units. The microcontroller's automatic adjustment method for the LED array includes the following steps: ① collecting attitude angle and communication distance or received signal strength; ② determining the communication state based on a signal quality threshold; ③ selecting the LED emitting unit corresponding to the target direction and activating adjacent units when the attitude deflects; ④ adjusting the LED drive circuit power through PWM or current setting values; ⑤ performing dynamic closed-loop optimization based on receiver feedback until the signal strength and bit error rate meet requirements. This method achieves adaptive adjustment of the LED array under different communication distances and attitude conditions, achieving optimal energy configuration and power consumption control.

[0046] In another embodiment, Figure 3 This is a schematic diagram of the jellyfish-inspired communication experimental platform designed in this invention. The cavity structure adopts an elongated oval shape with low resistance, and the interior has a large space to house the main control board and electronic control equipment. It is waterproofed by using a threaded tightening method. The sensing structure simulates the phototaxis of jellyfish, with the transmitting and receiving equipment of the optical communication system arranged in a dark chamber. A light-shielding shell blocks ambient light, improving the signal-to-noise ratio. The adjustment structure controls the jellyfish's steering, using servo motors to control the distribution of weight blocks, changing the overall center of gravity to achieve omnidirectional underwater movement and improve maneuverability. The drive structure uses a crank-slider as its core, employing fins made of flexible materials and a folding mechanism to achieve a dual-drive mode of oscillation and water spraying. The experimental platform consists of a drive structure and a control system, possessing advantages such as strong spatial integration capabilities, high anti-interference ability, and adaptability to multi-directional distribution of communication modules.

[0047] Working process: This experimental platform can move freely and flexibly underwater and meets the requirements of underwater omnidirectional optical communication. The optical communication system is set in a specially designed darkroom of the jellyfish test platform to eliminate the interference of ambient light on the communication effect. The transmitting device receives the signal to be transmitted through the connection with the microcontroller of the experimental platform. The signal is converted into an electrical drive signal through the modulation circuit, and then drives a high-power LED light source array to emit light through the light source drive circuit. The light is focused and shaped by the lens unit and reaches the receiving device through the underwater channel. The receiving equipment first converts the received weak light signal into a weak electrical signal through the photoelectric detection element, and then amplifies and filters it through the modulation circuit. After processing, the electrical signal is demodulated and restored to the original signal to be transmitted, realizing underwater wireless communication.

[0048] In another embodiment, the motion structure of the experimental platform adopts a dual-drive mode, providing forward propulsion through the oscillation of fins and water jetting at the tail of the origami-driven structure:

[0049] like Figure 4 As shown, the fin structure consists of a servo motor, a crank-slider, a connecting plate, and flexible fins. The crank-slider structure converts the rotational motion of the servo motor into the linear motion of the connecting plate. The flexible fins adopt a double-fin flexible design, with the outer fin fixed to the cavity and the inner fin connected to the connecting plate. When the connecting plate moves up and down, it drives the inner fin to move, causing the flexible fins to deform. When the fins recover their deformation, they generate thrust.

[0050] Furthermore, such as Figure 5 As shown, the flexible fin adopts an inner and outer double fin design and is made of flexible material. Supporting ribs are set between the inner and outer fins to ensure structural stability. The flexible material generates forward propulsion force when it recovers its deformation due to the relative position of the inner and outer fins.

[0051] In another embodiment, such as Figure 6 As shown, the origami drive structure consists of a servo motor, a crank-slider, a connecting plate, and an origami unit. The crank-slider structure converts the rotational motion of the servo motor into the linear motion of the connecting plate. The origami unit is made of flexible material. The up-and-down movement of the connecting plate causes the origami unit to stretch and contract, completing water absorption and spraying and providing propulsion.

[0052] Furthermore, such as Figure 7 As shown, the origami unit adopts the Yoshimura origami model and is made of flexible material. It changes the internal space volume by stretching and compressing to complete the water inlet and outlet. One-way valves are set at the top and bottom to ensure unidirectional water flow and provide forward propulsion when spraying water.

[0053] In another embodiment, the main control unit of the platform is located in the inner cavity of the upper cavity structure and uses a spiral sealing method to achieve waterproofing of the platform's electronic equipment. The main control board is responsible for the platform's motion control and environmental detection, as well as the drive control of the communication system.

[0054] In another embodiment, Figure 8 This is a schematic diagram of the transmitting and receiving equipment of an underwater optical communication system. A single underwater optical communication system consists of a transmitter and a receiver, which are responsible for transmitting and receiving underwater optical signals, respectively. The transmitter structure consists of an arbitrary waveform generator (AWG), a signal amplification module, a voltage biasing module, a light source driving circuit, an LED array structure, and a shaping optical lens.

[0055] In another embodiment, the host computer generates a signal with a predetermined waveform based on the information to be transmitted. This signal is amplified by an AWG signal, voltage biased, and then input to the light source driving circuit. After conversion, it generates a control electrical signal for the LED array. The LED array structure emits a light signal carrying the information to be transmitted based on the input control electrical signal. After being shaped by a lens, the light signal enters the underwater channel. The receiving end consists of a secondary converging lens, a photodetector, a current-to-voltage conversion module, a filtering module, and an oscilloscope (OSG). The receiving end captures the light signal in the underwater channel and focuses it onto the next-stage photodetector through the secondary converging lens. The light signal is converted into an electrical signal by the photodetector, and after current-to-voltage conversion and noise filtering, it is transmitted to the lower computer via the OSG for demodulation and restoration to the original signal. The entire communication process realizes a complete flow from analog waveform input to optical modulation output and then to electrical signal reconstruction. This design has high integration and a compact structure, making it suitable for embedded applications on biomimetic platforms with limited underwater space.

[0056] In another embodiment, such as Figure 9 As shown, to achieve omnidirectional communication on a horizontal plane, this invention employs a hexagonal, equidistantly arranged LED communication system. The angles of the transmitting devices are complementary, ensuring that at least one light source is always aligned with the target receiver regardless of the platform's rotation. Simultaneously, Figure 10 Simulation results further validated the uniformity of light intensity distribution and the edge overlap compensation effect of this arrangement. The half-power angle of the transmitting devices in the optical communication system under different array structures is approximately 60°. Therefore, to achieve the performance requirements of underwater omnidirectional optical communication and minimize light source interference between adjacent transmitting devices, a spatially uniform hexagonal layout was adopted to arrange the communication system in the watertight structure above the jellyfish-inspired experimental platform. This strategy effectively reduced blind spots and signal overlap interference, meeting the requirements for multi-party synchronous communication under any platform posture. Simultaneously, all communication systems are controlled by the microcontroller of the jellyfish-inspired experimental platform, ensuring omnidirectional communication on the horizontal plane. The hexagonal equidistant arrangement strategy adopted in this invention can achieve a nearly uniform horizontal light intensity distribution with controllable edge energy attenuation, far superior to conventional linear or fan-shaped arrangements, verifying the design effectiveness of this invention in terms of omnidirectional uniform illumination capability and signal quality assurance.

[0057] To enhance the system's scalability and swarm operation capabilities, in another additional embodiment of the present invention, multiple biomimetic jellyfish platforms are supported for many-to-many networking communication. The multiple platforms are identified and linked through a unified communication protocol, and each platform is equipped with a unique address code. Synchronous scheduling is achieved through a central master control node. This design enables the system to possess the basic capabilities of underwater detection networks or swarm communication, expanding the application scenarios of the present invention.

[0058] The foregoing general description of the invention and its specific embodiments should not be construed as a limitation on the technical solution of the invention. Those skilled in the art, based on the disclosure of this application, can add, reduce, or combine the disclosed technical features in the foregoing general description and / or specific embodiments (including examples) without departing from the constituent elements of the invention, to form other technical solutions within the scope of protection of this application.

Claims

1. An omni-directional underwater optical communication experimental platform, characterized in that, The experimental platform comprises an underwater communication system and a bionic jellyfish underwater experimental platform; the underwater communication system is installed on the bionic jellyfish underwater experimental platform; The underwater communication system comprises a transmitting device, a receiving device and a communication subject; the communication subject transmits a signal to be sent to the transmitting device, the transmitting device converts an electrical signal into an optical signal and then sends the optical signal, and the receiving device receives the optical signal and restores the electrical signal to return to the communication subject.

2. The omni-directional underwater optical communication experimental platform according to claim 1, characterized in that, Preferably, the transmitting device comprises a watertight shell, and the shell is provided with an LED array light source with series-parallel hybrid redundancy design, a signal amplification module, a voltage bias module and a light source driving circuit; the LED array light source can maintain the integrity of the communication link under the condition of partial light source failure while ensuring the overall transmission power.

3. The omni-directional underwater optical communication experimental platform according to claim 2, characterized in that, The transmitting device converts an electrical signal into a modulated optical signal through the signal amplification module, the voltage bias module and the light source driving circuit, and performs multi-directional high-uniformity emission through the optically shaped LED array light source, thereby realizing omnidirectional underwater optical signal coverage.

4. The omni-directional underwater optical communication experimental platform according to claim 2, characterized in that, An optical lens is arranged at the front end of the LED array light source, which collimates and shapes the light and seals the watertight device and the shell.

5. The omni-directional underwater optical communication experimental platform according to claim 1, characterized in that, The receiving device comprises a watertight shell, and the shell is provided with a photoelectric detection element at one end and a communication interface at the other end, and is provided with the photoelectric detection element, a high-speed current-voltage conversion module and a filter module in the shell.

6. The omni-directional underwater optical communication experimental platform according to claim 1, characterized in that, The transmitting device adopts a spatially uniform layout mode, and according to the spatial coverage angle range of a single transmitting device, the transmitting device units are arranged in an equidistant arrangement mode within the circumferential range to cover all areas in the space.

7. The omni-directional underwater optical communication experimental platform according to claim 1, characterized in that, The bionic jellyfish underwater experimental platform adopts a double-drive structure of flexible fin strips and paper folding mechanisms to realize flexible movement underwater, and adopts a gravity center adjusting structure to realize turning underwater, and a single-chip microcomputer is arranged in a sealed cabin to be responsible for motion control of the jellyfish experimental platform and signal control of the optical communication system.

8. The omni-directional underwater optical communication experimental platform according to claim 1, characterized in that, The bionic jellyfish experimental platform is designed with a darkroom.

9. The omni-directional underwater optical communication experimental platform according to claim 1, characterized in that, The transmitting device is connected with a dynamic power adjusting module for adjusting the light emitting power of the LED array light source or the number of open units according to the communication distance, the platform attitude or the signal feedback, and the receiving device feeds back the receiving intensity information to the transmitting device through a signal strength detection module, for dynamically adjusting the transmission strategy.

10. The experimental platform of any one of claims 1 to 9, wherein, Multiple experimental platforms can be synchronously controlled and networked communicated through a unified communication protocol, and are suitable for underwater cluster or networked detection tasks.

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