Wireless optical communication transmission device suitable for underwater unmanned platform

Abstract

The utility model provides a wireless optical communication transmission device suitable for an underwater unmanned platform, and the device comprises a blue light communication machine and a green light communication machine, the blue light communication machine employs blue laser as a communication carrier to transmit an Ethernet signal, and the green light communication machine employs green laser as a communication carrier to transmit the Ethernet signal, thereby achieving the underwater bidirectional data transmission. According to the utility model, bidirectional data transmission can be realized underwater, and the application of real-time large-capacity data exchange is supported.

Description

TECHNICAL FIELD

[0001] The utility model belongs to underwater wireless communication technical field, concretely relates to a wireless optical communication transmission device suitable for underwater unmanned platform. BACKGROUND

[0002] Traditional underwater wireless communication mode is underwater acoustic communication transmission mode, and the advantage of underwater acoustic communication is long transmission distance, but also has certain limitation, first, the transmission rate of underwater acoustic communication is relatively low, usually is kbps level, second, the propagation speed of underwater acoustic communication in water is very slow, and acoustic link has serious communication delay, usually in seconds, and cannot support the application needing real-time large capacity data exchange.

[0003] Multiple underwater unmanned platforms cooperate in underwater, and a large amount of data exchange is needed between platforms, so the data volume is large, and the traditional underwater acoustic communication transmission mode cannot meet the data transmission demand between platforms. SUMMARY

[0004] Therefore, the utility model provides wireless optical communication transmission device suitable for underwater unmanned platform, and the device can realize bidirectional data transmission underwater, and the highest transmission rate of data can reach 100Mbps, and supports the application needing real-time large capacity data exchange.

[0005] In order to solve the above technical problem, the utility model is realized as follows.

[0006] A wireless optical communication transmission device suitable for underwater unmanned platform, comprising:

[0007] Blue light communication machine and green light communication machine, the blue light communication machine sends Ethernet signal with blue laser as communication carrier, the green light communication machine sends Ethernet signal with green laser as communication carrier, so as to realize bidirectional data transmission underwater;

[0008] In the blue light communication machine, the first signal processing module, the first electro-optical conversion module, the first laser driver and the first emission optical module are sequentially connected to form a transmission channel, the green light filter, the first lens, the first photomultiplier, the first photoelectric conversion module and the first signal processing module are connected to form a receiving channel, and the first power module supplies power to each component unit in the blue light communication machine, and the green light filter is used to filter stray light other than green laser;

[0009] In the green light communication machine, the second signal processing module, the second electro-optical conversion module, the second laser driver and the second emission optical module are sequentially connected to form a transmission channel, the blue light filter, the second lens, the second photomultiplier, the second photoelectric conversion module and the second signal processing module are connected to form a receiving channel, the second power module supplies power to each component unit in the green light communication machine, and the blue light filter is used to filter stray light other than blue laser.

[0010] Preferably, the first signal processing module and the second signal processing module are the same structure, including an Ethernet chip and a master processing unit FPGA; the Ethernet chip is connected with external terminal equipment through an Ethernet interface; the Ethernet chip is connected with the master processing unit FPGA; the master processing unit FPGA outputs LVTTL level signals through parallel-serial conversion to interact with the electro-optical conversion module.

[0011] Preferably, the first electro-optical conversion module and the second electro-optical conversion module are both composed of a T-shaped biasing device, a constant current source and a laser diode; the T-shaped biasing device is connected with the laser diode and the constant current source.

[0012] Preferably, the first photoelectric conversion module and the second photoelectric conversion module are both composed of a photoelectric conversion circuit and a signal amplification processing circuit; the signal amplification processing circuit outputs LVTTL level signals through parallel-serial conversion to interact with the master processing unit FPGA.

[0013] Preferably, the first transmitting optical module and the second transmitting optical module both include a beam expanding assembly, an alignment assembly and a focusing assembly.

[0014] Beneficial effects:

[0015] (1) The wireless optical communication transmission device adopts blue laser and green laser to realize sending and receiving, and can realize simultaneous wireless data transmission between two underwater unmanned platforms.

[0016] (2) Laser as a carrier makes the device have fast transmission rate, low delay and strong anti-electromagnetic interference ability, and can be applied to near-distance large data wireless transmission between underwater unmanned platforms.

[0017] (3) The device has simple structure, small size, light weight, portability, low energy consumption, and is very suitable for underwater unmanned platforms or various underwater equipment, without volume and weight burden. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a component block diagram of the wireless optical communication transmission device suitable for underwater unmanned platforms.

[0019] Figure 2 is a communication process schematic diagram of the embodiment. DETAILED DESCRIPTION

[0020] The technical content of the present application will be described in detail below in combination with the drawings and embodiments.

[0021] The utility model provides a wireless optical communication transmission device suitable for underwater unmanned platform, including blue light communication machine and green light communication machine.

[0022] As shown in the accompanying drawings Figure 1 The wireless optical communication transmission device comprises a blue light communication machine and a green light communication machine.

[0023] The blue light communication machine comprises a first signal processing module, a first electro-optical conversion module, a first laser driver, a first emission optical module, a green light filter, a first lens, a first photomultiplier, and a first photoelectric conversion module. The green light filter is used for filtering stray light other than green laser. The first signal processing module, the first electro-optical conversion module, the first laser driver, and the first emission optical module are sequentially connected to form a transmission channel for modulating and transmitting information to be sent on blue laser. The first power module supplies power to each component unit in the blue light communication machine.

[0024] When the blue light communication machine serves as a transmission end, the transmission signal is emitted from the first signal processing module, converted into a blue laser signal by the first electro-optical conversion module, processed by the first laser driver, and emitted through the first emission optical module. When the blue light communication machine serves as a receiving end, the incident light received from the green light communication machine passes through the green light filter to filter out stray light, is focused by the first lens to the first photomultiplier, and the first photomultiplier outputs an optical signal to the first electro-optical conversion module to convert it into an electrical signal, which is then input into the first signal processing module for information extraction and other receiving processing.

[0025] The green light communication machine comprises a second signal processing module, a second electro-optical conversion module, a second laser driver, a second emission optical module, a blue light filter, a second lens, a second photomultiplier, and a second photoelectric conversion module. The blue light filter is used for filtering stray light other than blue laser. The second signal processing module, the second electro-optical conversion module, the second laser driver, and the second emission optical module are sequentially connected to form a transmission channel. The second power module supplies power to each component unit in the green light communication machine.

[0026] When the green light communication machine is the receiving end, the blue laser from the blue light communication machine passes through the blue light filter to filter out stray light, and is focused by the second lens to the second photomultiplier. The second photomultiplier outputs an optical signal to the second electro-optical conversion module to convert it into an electrical signal, which is then input into the second signal processing module for information extraction and other receiving processing.

[0027] Referring to Figure 2 , the first signal processing module and the second signal processing module have the same structure and include an Ethernet chip and a master control processing unit FPGA. The Ethernet chip is connected to external terminal equipment through an Ethernet interface; the Ethernet chip is connected to the master control processing unit FPGA; and the master control processing unit FPGA outputs LVTTL level signals through parallel-serial conversion to interact with the electro-optical conversion module.

[0028] The first electro-optical conversion module and the second electro-optical conversion module each consist of a T-shaped biasing device, a constant current source and a laser diode; the T-shaped biasing device is connected to the laser diode and the constant current source, and uses an OOK modulation method to load LVTTL level signals onto a blue light source or a green light source.

[0029] The first photoelectric conversion module and the second photoelectric conversion module each consist of a photoelectric conversion circuit and a signal amplification processing circuit; the signal amplification processing circuit outputs LVTTL level signals through parallel-serial conversion to interact with the master control processing unit FPGA.

[0030] The first transmitting optical module and the second transmitting optical module can include a beam expanding assembly, an alignment assembly and a focusing assembly.

[0031] The following takes the blue light communication machine as the underwater wireless optical communication transmission device sending end 1 and the green light communication machine as the underwater wireless optical communication transmission device receiving end 2 as an example to describe in detail the signal processing process of the device.

[0032] As Figure 2As shown, the sending end receives the Ethernet signal sent by the terminal device 1 through the Ethernet, and enters the Ethernet chip. The Ethernet chip decodes and processes the received analog signal, converts the signal into a digital signal, and sends the signal to the master control processing unit FPGA. The FPGA internally caches the received converted Ethernet signal, encodes the data by using an encoder, and outputs an LVTTL level signal to the electro-optical conversion module after parallel-serial conversion. The electro-optical conversion module is composed of a Bias-T and a constant current source circuit, and uses an OOK modulation mode to load the LVTTL level signal on a blue light source. The sent optical signal is expanded, aligned, focused, and the like by a transmitting optical system, and is sent to the underwater wireless optical communication transmission device receiving end by using an underwater transmission channel.

[0033] The receiving end receives the blue light signal by using an optical receiving system, filters out the remaining stray light, and receives by PMT and sends to the photoelectric conversion module. The photoelectric conversion circuit in the photoelectric conversion module converts the received blue light signal into an electrical signal, inputs the electrical signal to the signal amplification processing circuit, obtains an LVTTL level pulse sequence, and sends the LVTTL level pulse sequence to the master control processing unit FPGA. The master control processing unit FPGA buffers, decodes, and processes the received LVTTL level pulse sequence, restores the original information, carries the original information in the Ethernet signal, and sends the Ethernet signal to the Ethernet chip. The Ethernet chip sends the Ethernet signal to the terminal device 2.

[0034] When the terminal device 2 sends information to the terminal device 1, the information is sent to the green light communication machine through the Ethernet, modulated on the green laser by the green light communication machine, and then transmitted to the terminal device 1. The terminal device 1 filters the stray light other than the green laser by using the internal green light filter, then performs photoelectric conversion and amplification processing, parses the original information, and sends the original information to the terminal device 1.

[0035] The above specific embodiments only describe the design principles of the utility model, and the shapes and names of the components in the description can be different and are not limited. Therefore, those skilled in the art can modify or equivalently replace the technical solutions recorded in the foregoing embodiments; and these modifications and replacements do not deviate from the purpose and technical solutions of the utility model, and should belong to the protection scope of the utility model.

Claims

1. A wireless optical communication transmission device suitable for an underwater unmanned platform, characterized in that, The application relates to a blue light communication machine and a green light communication machine. In the blue light communication machine, a first signal processing module, a first electro-optical conversion module, a first laser driver and a first emission optical module are sequentially connected to form a transmitting channel; a green light filter, a first lens, a first photomultiplier, a first photoelectric conversion module and the first signal processing module are connected to form a receiving channel; a first power module supplies power for the constituent units in the blue light communication machine; and the green light filter is used for filtering stray light other than green laser. In the green light communication machine, a second signal processing module, a second electro-optical conversion module, a second laser driver and a second emission optical module are sequentially connected to form a transmitting channel; a blue light filter, a second lens, a second photomultiplier, a second photoelectric conversion module and the second signal processing module are connected to form a receiving channel; a second power module supplies power for the constituent units in the green light communication machine; and the blue light filter is used for filtering stray light other than blue laser. The first signal processing module and the second signal processing module have the same structure and comprise an Ethernet chip and a master control processing unit FPGA; the Ethernet chip is connected with external terminal equipment through an Ethernet interface; the Ethernet chip is connected with the master control processing unit FPGA; and the master control processing unit FPGA outputs an LVTTL level signal through parallel-serial conversion to interact with the electro-optical conversion module.

2. The wireless optical communication transmission device of claim 1, wherein, The first electro-optical conversion module and the second electro-optical conversion module are both composed of a T-shaped biasing device, a constant current source and a laser diode; the T-shaped biasing device is connected with the laser diode and the constant current source.

3. The wireless optical communication transmission device of claim 1, wherein, The first photoelectric conversion module and the second photoelectric conversion module are both composed of a photoelectric conversion circuit and a signal amplification processing circuit; the signal amplification processing circuit outputs an LVTTL level signal through parallel-serial conversion to interact with the master control processing unit FPGA.

4. The wireless optical communication transmission device of claim 1, wherein, The first emission optical module and the second emission optical module both comprise a beam expanding assembly, an alignment assembly and a focusing assembly.

5. The wireless optical communication transmission device according to any one of claims 1 to 4, wherein ​

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