Lightweight and long-distance underwater LED wireless optical communication transmission system

Abstract

A lightweight, long-distance underwater LED wireless optical communication transmission system includes: a transmitting end for transmitting optical signals, the transmitting end includes: a data acquisition module; a transmitting end electro-optical conversion module; a transmitting end transmission optical fiber; a transmitting end with a watertight mechanical structure, including: a transmitting end photoelectric conversion module; a transmitting end digital signal processing module; a digital-to-analog conversion module; an amplifier; an LED array; a DC bias module; a transmitting end lens assembly; a receiving end for receiving optical signals transmitted by the transmitting end, including: a receiving end with a watertight mechanical structure, arranged underwater, including: a receiving end lens assembly; a detector; a transimpedance amplifier; an equalization and filtering module; an analog-to-digital conversion module; a receiving end digital signal processing module; a receiving end electro-optical conversion module; a receiving end transmission optical fiber; a receiving end photoelectric conversion module; and a data recovery module. The present invention is suitable for long-distance transmission due to the light weight of the optical fiber, and is not subject to electromagnetic interference, and the transmission signal is accurate.

Description

Technical Field

[0001] The invention relates to an underwater communication system, and in particular to a lightweight and long-distance underwater LED wireless optical communication transmission system. Background Art

[0002] 72% of the earth's surface is covered by the ocean. With the in-depth development of marine resources, human communication with the ocean is becoming more and more frequent. More and more underwater detection equipment, monitoring platforms and sensors are put into use, so there is an urgent need for the support of high-speed wireless communication technology. However, due to the skin effect of the ocean, the existing wireless communication technology is not suitable for long-distance ocean communication. As the main communication method for underwater communication, although the loss in seawater is very small, the side lobes during transmission are large, the directionality is not strong, and the communication rate is low and the confidentiality is poor, which makes it difficult to meet the increasing information transmission needs of underwater applications. In addition, acoustic wave communication is also affected by the marine environment, and the background noise is large, which reduces the quality of signal transmission. Therefore, there is an urgent need for a medium-distance high-speed communication technology as a supplementary means.

[0003] The attenuation of blue-green light in water is smaller than that of other optical bands, which lays the foundation for the development of underwater optical communication. In addition, the underwater optical communication system has the advantages of large transmission bandwidth, high data transmission efficiency and small size of communication equipment, which can solve the problem of underwater high-speed wireless transmission. In addition, with the continuous development of technology, the cost of LEDs suitable for submarine transmission has decreased, the luminous efficiency has increased, and the transmission with a large divergence angle and the reception with a large field of view at the receiving end have greatly reduced the difficulty of system design. In addition, the underwater LED wireless optical communication transmission system is easy to connect with various communication methods currently used, has good adaptability to the underwater environment, is easy to expand and upgrade, has strong confidentiality, and has high communication rate. It is particularly suitable for the interconnection of various sensors in the deep sea, data collection, and the connection between the surface platform and underwater equipment, and has a very broad application prospect. Each module of the existing underwater communication system is connected by a cable. The underwater transmitting end or receiving end of the communication system must be close to the signal acquisition end or data recovery end in the ocean. If the distance is far, the long-distance transmission will be subject to a large amount of electromagnetic interference due to the use of cables for transmission during the intermediate signal transmission, which will interfere with the transmission signal. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned problems existing in the prior art and to provide a lightweight and long-distance underwater LED wireless optical communication transmission system that avoids electromagnetic interference.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] A lightweight and long-distance underwater LED wireless optical communication transmission system, comprising:

[0007] A transmitting end, used for transmitting an optical signal, the transmitting end comprising:

[0008] Data acquisition module, used to collect data that needs to be transmitted;

[0009] An electro-optical conversion module at the transmitting end, whose input end is connected to the output end of the data acquisition module;

[0010] The transmitting end transmission optical fiber, the input end of which is connected to the output end of the transmitting end electro-optical conversion module;

[0011] The launch end with a watertight mechanical structure is set underwater and includes:

[0012] The transmitting end photoelectric conversion module, the input end of which is connected to the output end of the transmitting end transmission optical fiber;

[0013] A transmitting end digital signal processing module, the input end of which is connected to the output end of the transmitting end photoelectric conversion module;

[0014] A digital-to-analog conversion module, the input end of which is connected to the output end of the transmitting end digital signal processing module;

[0015] An amplifier, whose input end is connected to the output end of the digital-to-analog conversion module;

[0016] An LED array, whose signal input end is connected to the output end of the amplifier, is used to emit an optical signal with a modulated coding signal;

[0017] A DC bias module, electrically connected to the LED array, for providing a working power supply to the LED array, and for acting on the LED array to emit a light signal together with the signal output by the amplifier;

[0018] The transmitting end lens assembly is used to transmit the optical signal emitted by the LED array into the transmission medium;

[0019] The receiving end is used to receive the optical signal transmitted by the transmitting end, including:

[0020] The receiving end with a watertight mechanical structure is set underwater and includes:

[0021] The receiving end lens assembly is used for the optical signal emitted by the transmitting end to pass through and to converge the received optical signal;

[0022] A detector, used to detect the signal light transmitted through the receiving end lens assembly;

[0023] A transimpedance amplifier, whose input end is connected to the output end of the detector;

[0024] An equalization and filtering module, the input end of which is connected to the output end of the transimpedance amplifier;

[0025] An analog-to-digital conversion module, whose input end is connected to the output end of the equalization and filtering module;

[0026] A receiving end digital signal processing module, the input end of which is connected to the output end of the analog-to-digital conversion module;

[0027] A receiving-end electro-optical conversion module, whose input end is connected to the output end of the receiving-end digital signal processing module;

[0028] A receiving end transmission optical fiber, the input end of which is connected to the output end of the receiving end electro-optical conversion module;

[0029] A receiving end photoelectric conversion module, the input end of which is connected to the output end of the receiving end transmission optical fiber;

[0030] The data recovery module has an input end connected to the output end of the receiving end photoelectric conversion module.

[0031] The lightweight, long-distance underwater LED wireless optical communication transmission system of the present invention is characterized in that the LED array can emit light with a wavelength of 450nm-550nm.

[0032] The lightweight and long-distance underwater LED wireless optical communication transmission system of the present invention is characterized in that the transmitting end digital signal processing module comprises:

[0033] A coding unit, used for coding a digital signal;

[0034] The modulation unit is used to modulate the encoded digital signal.

[0035] The lightweight and long-distance underwater LED wireless optical communication transmission system of the present invention is characterized in that the receiving end digital signal processing module comprises:

[0036] A demodulation unit, used for demodulating an input digital signal;

[0037] The decoding unit is used for decoding the demodulated digital signal.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. At the transmitting end, by setting a transmitting end electro-optical conversion module, a transmitting end transmission optical fiber, and a transmitting end photoelectric conversion module, the transmitting end electro-optical conversion module converts the electrical signal in the data acquisition module into an optical signal, and the optical signal is transmitted to the transmitting end photoelectric conversion module by the transmission optical fiber, and the optical signal is converted back into an electrical signal, and then processed by subsequent modules to transmit the corresponding optical signal; by using optical fiber to transmit signals, electromagnetic interference can be effectively avoided, and the transmission signal can be ensured to be accurate. The transmitting end with a watertight mechanical structure can be placed in the deep sea at a position far away from the data acquisition module as needed.

[0040] 2. At the receiving end, by setting a receiving end electro-optical conversion module, a receiving end transmission optical fiber, and a receiving end photoelectric conversion module, the receiving end electro-optical conversion module converts the electrical signal in the receiving end digital signal processing module into an optical signal, and the optical signal is transmitted to the receiving end photoelectric conversion module by the transmission optical fiber. The receiving end photoelectric conversion module converts the optical signal back into an electrical signal, and then passes through the data recovery module to restore the signal data; by using optical fiber to transmit signals, electromagnetic interference can be effectively avoided, and the transmission signal can be guaranteed to be accurate. The receiving end with a watertight mechanical structure can be placed in the deep sea at a position far away from the data recovery module as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of an embodiment of the present invention; DETAILED DESCRIPTION

[0042] The attenuation of blue-green light in water is smaller than that of other optical bands, which lays the foundation for the development of underwater optical communication. In addition, the underwater optical communication system has the advantages of large transmission bandwidth, high data transmission efficiency and small size of communication equipment, which can solve the problem of underwater high-speed wireless transmission. In addition, with the continuous development of technology, the cost of LEDs suitable for transmission on the seabed has decreased, the luminous efficiency has increased, and the transmission with a large divergence angle and the reception with a large field of view at the receiving end have greatly reduced the difficulty of system design. In addition, the underwater LED wireless optical communication transmission system is easy to connect with various communication methods currently used, has good adaptability to the underwater environment, is easy to expand and upgrade, has strong confidentiality, and has high communication rate. It is particularly suitable for the interconnection of various sensors in the deep sea, data collection, and the connection between the surface platform and underwater equipment. It has a very broad application prospect. Each module of the existing underwater communication system is connected by a cable. The underwater transmitting end or receiving end of the communication system must be close to the signal acquisition end or data recovery end in the ocean. If the distance is far, the intermediate signal is transmitted by cable. Long-distance transmission will It is subject to a large amount of electromagnetic interference, which in turn interferes with the transmission signal. On the other hand, when cables are used over long distances, due to the high density of the cables, if the data acquisition module is installed on the ship, due to the existence of long-distance underwater cables, the weight of the underwater cables is large, and the density of the underwater cables is greater than the density of water. The ship is required to apply a large upward pulling force to the underwater cables to prevent the cables from falling to the bottom of the sea. Long-distance underwater cable transmission will cause the ship to carry a large load. On the last aspect, more cables are used for long-distance transmission. In the process of transporting the entire device by ship, the cables are too heavy, which also causes the ship to carry a large load.

[0043] Based on this, the present invention provides a lightweight and long-distance underwater LED wireless optical communication transmission system, comprising:

[0044] The transmitting end is used to transmit optical signals. The transmitting end includes:

[0045] The data acquisition module 101 is used to acquire data to be transmitted;

[0046] The input end of the transmitting end electro-optical conversion module 201 is connected to the output end of the data acquisition module 101;

[0047] The transmitting end transmission optical fiber 301, the input end of which is connected to the output end of the transmitting end electro-optical conversion module 201;

[0048] The transmitting end 401 with a watertight mechanical structure is arranged underwater and includes:

[0049] The input end of the transmitting end photoelectric conversion module 4001 is connected to the output end of the transmitting end transmission optical fiber 301;

[0050] The transmitting end digital signal processing module 4002, the input end of which is connected to the output end of the transmitting end photoelectric conversion module 4001;

[0051] The digital-to-analog conversion module 4003, whose input end is connected to the output end of the transmitting end digital signal processing module 4002;

[0052] Amplifier 4004, the input end is connected to the output end of the digital-to-analog conversion module 4002;

[0053] LED array 4006, whose signal input end is connected to the output end of amplifier 4004, is used to emit an optical signal with a modulated coding signal;

[0054] A DC bias module 4005 is electrically connected to the LED array 4006, and is used to provide a working power supply to the LED array 4006, and is used to act on the LED array 4006 to emit a light signal together with the signal output by the amplifier 4004;

[0055] The transmitting end lens assembly 4007 is used to transmit the optical signal emitted by the LED array 4006 into the transmission medium;

[0056] The receiving end is used to receive the optical signal transmitted by the transmitting end, including:

[0057] The receiving end 601 with a watertight mechanical structure is arranged underwater and includes:

[0058] The receiving end lens assembly 6001 is used for passing the optical signal sent by the transmitting end and converging the received optical signal;

[0059] The detector 6002 is used to detect the signal light transmitted through the receiving end lens assembly 6001;

[0060] A transimpedance amplifier 6003, whose input terminal is connected to the output terminal of the detector 6002;

[0061] The equalization and filtering module 6004, the input end of which is connected to the output end of the transimpedance amplifier 6003;

[0062] The analog-to-digital conversion module 6005, whose input end is connected to the output end of the equalization and filtering module 6004;

[0063] The receiving end digital signal processing module 6006, the input end is connected to the output end 6005 of the analog-to-digital conversion module;

[0064] The receiving end electro-optical conversion module 6007, the input end of which is connected to the output end of the receiving end digital signal processing module 6006;

[0065] The receiving end transmission optical fiber 701, the input end is connected to the output end of the receiving end electro-optical conversion module 607;

[0066] The receiving end photoelectric conversion module 801, the input end of which is connected to the output end of the receiving end transmission optical fiber 701;

[0067] The data recovery module 901 has an input end connected to the output end of the receiving-end photoelectric conversion module 801 .

[0068] During the use of the present invention, the specific communication process is as follows: the data acquisition module 101 acquires the signal to be transmitted, the electrical signal acquired by the data acquisition module 101 is converted into an optical signal by the transmitting end electro-optical conversion module 201, the optical signal enters the transmitting end transmission optical fiber 301 from the transmitting end electro-optical conversion module 201, the optical signal enters the transmitting end photoelectric conversion module 4001 through the transmitting end transmission optical fiber 301 and is converted into an electrical signal, the electrical signal is transmitted to the transmitting end digital signal processing module 4002, the electrical signal is encoded and modulated, and then enters the digital-to-analog conversion module 4003 to be converted into an analog signal, the analog signal is amplified by the amplifier 4004, and then acts on the LED array 4006 together with the DC bias module 4005 to emit an optical signal with a modulated coding signal, and the optical signal is converged by the transmitting end lens assembly 4007 to avoid dispersion during transmission in the ocean, and at the same time, the light The signal is transmitted to the underwater channel 501, which can be an ocean, a river, a lake, etc. After the optical signal is transmitted through the underwater channel 501, it enters the detector 6002 through the receiving end lens assembly 6001. After the detector detects the signal, it transmits the detected signal to the transimpedance amplifier 6003 for amplification, and then passes through the equalization and filtering module 6004 to equalize and filter the signal. The signal after equalization and filtering enters the analog-to-digital conversion module to convert the signal into a digital signal. Then the signal enters the receiving end digital signal processing module 6006 to demodulate and decode the digital signal. The demodulated and decoded signal enters the receiving end electro-optical conversion module 6007 to convert the digital signal into an optical signal. After the optical signal is transmitted through the receiving end transmission optical fiber, it enters the receiving end electro-optical conversion module 801 to be converted back into a digital signal. Then the digital signal is restored by the data recovery module 901.

[0069] At the transmitting end, by setting a transmitting end electro-optical conversion module 201, a transmitting end transmission optical fiber 301, and a transmitting end photoelectric conversion module 4001, the transmitting end electro-optical conversion module converts the electrical signal in the data acquisition module into an optical signal, and the optical signal is transmitted to the transmitting end photoelectric conversion module by the transmission optical fiber, and the optical signal is converted back into an electrical signal, and then processed by subsequent modules to transmit the corresponding optical signal. By using optical fiber to transmit signals, electromagnetic interference can be effectively avoided, and the transmission signal can be ensured to be accurate. The transmitting end 401 with a watertight mechanical structure can be placed in the deep sea at a position far away from the data acquisition module as needed;

[0070] At the receiving end, by setting a receiving end electro-optical conversion module 6007, a receiving end transmission optical fiber 701, and a receiving end photoelectric conversion module 801, the receiving end electro-optical conversion module converts the electrical signal in the receiving end digital signal processing module into an optical signal, and the optical signal is transmitted to the receiving end photoelectric conversion module 801 by the transmission optical fiber. The receiving end photoelectric conversion module 801 converts the optical signal back into an electrical signal, and then passes through a data recovery module 901 to restore the signal data; by using optical fiber to transmit signals, electromagnetic interference can be effectively avoided, and the transmission signal can be ensured to be accurate. The receiving end with a watertight mechanical structure can be placed in the deep sea at a position far away from the data recovery module as needed.

[0071] At the same time, since the density of optical fiber is relatively small, when optical fiber is used to transmit signals over long distances, the optical fiber used is relatively light. If the data acquisition module or the data recovery module needs to be installed on the ship, it will not cause a large downward pull on the ship, and the ship does not need to carry a large load, thereby ensuring the normal operation of the ship, so that the data acquisition module or the data recovery module can be installed on the ship; and when transporting the entire device, the ship will not carry a large weight, thereby enabling the entire system to be normally transported on the ship.

[0072] It should be noted that the data acquisition module can be implemented using a processor, a camera, and a microphone; the transmitting end electro-optical conversion module 201 and the receiving end electro-optical conversion module 6007 can be implemented using an electro-optical converter; the transmitting end photoelectric conversion module 4001 and the receiving end photoelectric conversion module 801 can be implemented using a photoelectric converter; the transmitting end digital signal processing module 4002 and the receiving end digital signal processing module 6006 can be implemented using a processor or a field programmable gate array (FPGA), and the transmitting digital-to-analog conversion module 4003 can be implemented using a digital-to-analog converter; the amplifier 4004 and the DC bias module 4005 are prior arts and are not described in detail here, and the lens assembly is a commonly used component in the communication system and is not described in detail here; the detector 6002 can be implemented using a photodetector; the transimpedance amplifier is a commonly used technology in this field and is not described in detail here, and the equalization and filtering module 6005 can be implemented by a filter; the analog-to-digital conversion module 6005 can be implemented using an analog-to-digital converter; the data recovery module can adopt devices such as speakers and display screens that cooperate with the data acquisition module as needed.

[0073] It should be noted that the transmitting end 401 with a watertight mechanical structure is generally made to be sealed as a whole underwater; the receiving end 601 with a watertight mechanical structure is also made to be sealed as a whole underwater; the data acquisition end can be placed on the mainland or on a ship, and the corresponding data recovery end can be set in a submarine or an underwater workstation, or the data recovery end is set on the mainland or on a ship, and the data acquisition end is set in a submarine or an underwater workstation.

[0074] In some embodiments, the transmitting end electro-optical conversion module 201, the transmitting end transmission optical fiber 301, and the transmitting end photoelectric conversion module 4001 can also be arranged in sequence between the transmitting end digital signal processing module 4002 and the digital-to-analog conversion module 4003 or between the digital-to-analog conversion module 4003 and the amplifier 4004. At this time, the transmitting end 401 with a watertight mechanical structure includes the transmitting end photoelectric conversion module 4001 and subsequent devices, which are sealed underwater. The positions between the transmitting end electro-optical conversion module 201, the transmitting end transmission optical fiber 301, and the transmitting end photoelectric conversion module 4001 can be set as needed, so that the photoelectric conversion module 4001 and subsequent devices are fewer, reducing the number of components to be sealed in the transmitting end 401 with a watertight mechanical structure, thereby reducing the design difficulty of the transmitting end 401 with a watertight mechanical structure, and at the same time reducing the volume to be sealed. For underwater sealing, the larger the volume, the more difficult it is to seal, and the smaller the volume, the easier it is to seal, thereby reducing the difficulty in mechanical structure design.

[0075] In some embodiments, the receiving end electro-optical conversion module 6007, the receiving end transmission optical fiber 701, and the receiving end photoelectric conversion module 801 can also be arranged in sequence between the detector 6002 and the transimpedance amplifier 6003, between the transimpedance amplifier 6003 and the equalization and filtering module 6004, between the equalization and filtering module 6004 and the analog-to-digital conversion module 6005, or between the analog-to-digital conversion module 6005 and the receiving end digital signal processing module 6006. The receiving end 601 with a watertight mechanical structure includes the receiving end electro-optical conversion module 6007 and its previous components, which are sealed underwater; the positions of the electro-optical conversion module 6007, the receiving end transmission optical fiber 701, and the receiving end photoelectric conversion module 801 can be set as needed, so that the receiving end electro-optical conversion module 6007 and the previous components are fewer, reducing the number of components contained in the receiving end 601 with a watertight mechanical structure, thereby reducing the volume to be sealed and reducing the difficulty in mechanical structure design.

[0076] In some embodiments, the LED array 4006 can emit light with a wavelength of 450nm-550nm. The wavelength of light between 450nm-550nm is blue-green light. The blue-green light attenuates less in water than other light bands and is more suitable for underwater transmission.

[0077] In some embodiments, the transmitting end digital signal processing module 4002 includes:

[0078] The encoding unit 40021 is used to encode the digital signal;

[0079] The modulation unit 40022 is used to modulate the coded digital signal. The digital signal is encoded and modulated by the coding unit and the modulation unit.

[0080] In some embodiments, the receiving end digital signal processing module 6006 includes:

[0081] The demodulation unit 60061 is used to demodulate the input digital signal;

[0082] The decoding unit 60062 is used to decode the demodulated digital signal, and demodulates and decodes the digital signal through the demodulation unit and the decoding unit.

[0083] The embodiments described above are merely descriptions of preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the scope of protection determined by the claims of the present invention.

Claims

1. A lightweight and long-distance underwater LED wireless optical communication transmission system, characterized in that: include: A transmitting end, used for transmitting an optical signal, the transmitting end comprising: A data acquisition module (101), used for acquiring data to be transmitted; An electric-optical conversion module (201) at the transmitting end, the input end of which is connected to the output end of the data acquisition module (101); A transmitting end transmission optical fiber (301), the input end of which is connected to the output end of the transmitting end electro-optical conversion module (201); A launching end (401) with a watertight mechanical structure, arranged underwater, comprises: A transmitting end photoelectric conversion module (4001), the input end of which is connected to the output end of the transmitting end transmission optical fiber (301); A transmitting end digital signal processing module (4002), the input end of which is connected to the output end of the transmitting end photoelectric conversion module (4001); A digital-to-analog conversion module (4003), the input end of which is connected to the output end of the transmitting end digital signal processing module (4002); An amplifier (4004), the input end of which is connected to the output end of the digital-to-analog conversion module (4003); An LED array (4006), whose signal input end is connected to the output end of the amplifier (4004), is used to emit an optical signal with a modulated coding signal; A direct current bias module (4005) is electrically connected to the LED array (4006), and is used to provide a working power supply to the LED array (4006), and is used to act together with the signal output by the amplifier (4004) on the LED array (4006) to emit a light signal; A transmitting end lens assembly (4007) is used to transmit the optical signal emitted by the LED array (4006) into a transmission medium; The receiving end is used to receive the optical signal transmitted by the transmitting end, including: A receiving end (601) with a watertight mechanical structure, arranged underwater, comprises: The receiving end lens assembly (6001) is used for the optical signal emitted by the transmitting end to pass through and for converging the received optical signal; A detector (6002), used for detecting the signal light transmitted through the receiving end lens assembly (6001); A transimpedance amplifier (6003), the input end of which is connected to the output end of the detector (6002); An equalization and filtering module (6004), the input end of which is connected to the output end of the transimpedance amplifier (6003); An analog-to-digital conversion module (6005), whose input end is connected to the output end of the equalization and filtering module (6004); A receiving end digital signal processing module (6006), the input end of which is connected to the output end (6005) of the analog-to-digital conversion module; A receiving-end electro-optical conversion module (6007), the input end of which is connected to the output end of the receiving-end digital signal processing module (6006); A receiving end transmission optical fiber (701), the input end of which is connected to the output end of the receiving end electro-optical conversion module (6007); A receiving end photoelectric conversion module (801), the input end of which is connected to the output end of the receiving end transmission optical fiber (701); A data recovery module (901), the input end of which is connected to the output end of the receiving end photoelectric conversion module (801); The specific communication process is as follows: the data acquisition module (101) acquires the signal to be transmitted, the electrical signal acquired by the data acquisition module (101) is converted into an optical signal through the transmitting end electro-optical conversion module (201), the optical signal enters the transmitting end transmission optical fiber (301) through the transmitting end electro-optical conversion module (201), the optical signal enters the transmitting end photoelectric conversion module (4001) through the transmitting end transmission optical fiber (301) and is converted into an electrical signal, the electrical signal is transmitted to the transmitting end digital signal processing module (4002), the electrical signal is encoded and modulated, and then enters the digital-to-analog conversion module (4003) and converted into an analog signal, the analog signal is amplified through the amplifier (4004), and then acts on the LED array (4006) together with the DC bias module (4005), emitting an optical signal with a modulated coding signal, and the optical signal is converged through the transmitting end lens assembly (4007) to avoid transmission in the ocean. The optical signal is dispersed in time, and is simultaneously transmitted to the underwater channel (501) for transmission. After being transmitted through the underwater channel (501), the optical signal passes through the receiving end lens assembly (6001) and enters the detector (6002). After the detector detects the signal, the detected signal is transmitted to the transimpedance amplifier (6003) for amplification. The signal is then equalized and filtered by the equalization and filtering module (6004). The signal after equalization and filtering enters the analog-to-digital conversion module to convert the signal into a digital signal. The signal then enters the receiving end digital signal processing module (6006) to demodulate and decode the digital signal. The demodulated and decoded signal enters the receiving end electro-optical conversion module (6007) to convert the digital signal into an optical signal. The optical signal is transmitted through the receiving end transmission optical fiber and enters the receiving end photoelectric conversion module (801) to be converted back into a digital signal. The digital signal then passes through the data recovery module (901) to recover the data. At the transmitting end, by providing a transmitting end electro-optical conversion module (201), a transmitting end transmission optical fiber (301), and a transmitting end photoelectric conversion module (4001), the transmitting end electro-optical conversion module converts the electrical signal in the data acquisition module into an optical signal, and the optical signal is transmitted to the transmitting end photoelectric conversion module via the transmission optical fiber, and the optical signal is converted back into an electrical signal, which is then processed by a subsequent module and a corresponding optical signal is emitted; At the receiving end, by providing a receiving end electro-optical conversion module (6007), a receiving end transmission optical fiber (701), and a receiving end photoelectric conversion module (801), the receiving end electro-optical conversion module converts the electrical signal in the receiving end digital signal processing module into an optical signal, the optical signal is transmitted to the receiving end photoelectric conversion module (801) via the transmission optical fiber, the receiving end photoelectric conversion module (801) converts the optical signal back into an electrical signal, and then passes through a data recovery module (901) to recover the signal data; The transmitting end electro-optical conversion module (201), the transmitting end transmission optical fiber (301), and the transmitting end photoelectric conversion module (4001) are sequentially arranged between the transmitting end digital signal processing module (4002) and the digital-to-analog conversion module (4003) or between the digital-to-analog conversion module (4003) and the amplifier (4004). In this case, the transmitting end (401) with a watertight mechanical structure includes the transmitting end photoelectric conversion module (4001) and subsequent devices. The receiving end electro-optical conversion module (6007), the receiving end transmission optical fiber (701), and the receiving end photoelectric conversion module (801) can also be arranged in sequence between the detector (6002) and the transimpedance amplifier (6003), between the transimpedance amplifier (6003) and the equalization and filtering module (6004), between the equalization and filtering module (6004) and the analog-to-digital conversion module (6005), or between the analog-to-digital conversion module (6005) and the receiving end digital signal processing module (6006). The receiving end (601) with a watertight mechanical structure includes the receiving end electro-optical conversion module (6007) and the components preceding it, which are sealed underwater. The positions of the electro-optical conversion module (6007), the receiving end transmission optical fiber (701), and the receiving end photoelectric conversion module (801) are arranged as required.

2. The lightweight and long-distance underwater LED wireless optical communication transmission system according to claim 1 is characterized in that: The LED array (4006) can emit light with a wavelength of 450nm-550nm.

3. The lightweight and long-distance underwater LED wireless optical communication transmission system according to claim 1 is characterized in that: The transmitting end digital signal processing module (4002) comprises: A coding unit (40021), used for coding a digital signal; The modulation unit (40022) is used to modulate the encoded digital signal.

4. The lightweight and long-distance underwater LED wireless optical communication transmission system according to claim 1 is characterized in that: The receiving end digital signal processing module (6006) comprises: A demodulation unit (60061), used for demodulating an input digital signal; The decoding unit (60062) is used to decode the demodulated digital signal.

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