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Underwater wireless optical communication transmitting terminal, optical communication receiving terminal, underwater wireless optical communication device and underwater wireless optical communication method

A technology of wireless optical communication and communication transmission, which is applied in the fields of optical communication receiving terminals, underwater wireless optical communication devices, and underwater wireless optical communication transmitting terminals. Avoid the disadvantages of high cost and improve the effect of signal-to-noise ratio

Pending Publication Date: 2022-08-05
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention solves the problem that the existing ocean observation network is difficult to lay and maintain, and the cost is high

Method used

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  • Underwater wireless optical communication transmitting terminal, optical communication receiving terminal, underwater wireless optical communication device and underwater wireless optical communication method

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Embodiment approach 1

[0035] Embodiment 1. An underwater wireless optical communication transmitting terminal described in this embodiment, the transmitting terminal is realized based on an LED array light source, and the transmitting terminal includes:

[0036] Communication emission light source 1, optical lens 2, passive temperature control unit 3, coding modulation unit 4, digital-to-analog conversion D / A unit 5, light source driving unit 6 and transmitter communication interface 7; the communication emission light source 1 is an LED array light source ; The passive temperature control unit 3 is in close contact with the back of the communication emission light source 1 for heat dissipation;

[0037]The transmitting end communication interface 7 receives and transmits the communication signal to the coding and modulation unit 4, and the transmitted communication signal is transmitted to the digital-to-analog conversion D / A unit 5 after being coded and modulated by the coding and modulation unit ...

Embodiment approach 2

[0040] Embodiment 2. This embodiment is a further limitation of the underwater wireless optical communication transmitting terminal described in Embodiment 1. In this embodiment, the wavelength range of the communication transmitting light source 1 is 460nm-485nm.

[0041] In this embodiment, the communication transmitting terminal is installed on the bottom of the underwater unmanned vehicle, and the communication receiving terminal is installed on the upper end of the submarine base station. The communication distance between the underwater unmanned vehicle and the submarine base station is 20m. When the human submersible is just above the submarine base station, the light source of the communication transmitting terminal at the bottom of the underwater unmanned vehicle is turned on. The LED array light source is emitted downward with a large beam divergence angle, and the far-field light spot can transmit the communication receiving terminal on the submarine base station. Op...

Embodiment approach 3

[0044] Embodiment 3. This embodiment is a further limitation of the underwater wireless optical communication transmitting terminal described in Embodiment 1. In this embodiment, the optical lens 2 is a high-power LED condensing lens, with a diameter of 15 mm and a thickness of 15 mm. It is 6.6mm, and the divergence angle of the input beam is compressed to ±15° and then output.

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Abstract

The invention discloses an underwater wireless optical communication transmitting terminal, an optical communication receiving terminal, an underwater wireless optical communication device and an underwater wireless optical communication method. The construction method comprises the steps that the transmitting terminal completes information coding through the coding modulation unit, digital signals are converted into analog signals through the digital-to-analog conversion D / A unit, the coded information is loaded to the communication transmitting light source through the light source driver, and light beams are shaped, converged and then transmitted through the optical lens; a receiving antenna of a receiving terminal gathers received optical communication light beams, the light beams are gathered on an effective photosensitive surface of an APD photoelectric detector through a narrow-band optical filter, the APD photoelectric detector converts received communication optical signals into electric signals, the electric signals are amplified through a signal amplifier, the amplified electric signals are subjected to data recovery through a coding demodulation unit, and the received optical communication light beams are transmitted to the receiving terminal. An analog signal of the recovered data is converted into a digital signal by an analog-to-digital (A / D) conversion unit, and the digital signal is transmitted to a master control upper computer of a receiving terminal through a communication interface of a receiving end; the establishment of a communication link between the transmitting terminal and the receiving terminal is realized.

Description

technical field [0001] The invention relates to the technical field of underwater wireless optical communication, in particular to an underwater wireless optical communication transmitting terminal, an optical communication receiving terminal, and an underwater wireless optical communication device and method. Background technique [0002] Ocean observation network is an important technical means for exploring marine information, and it is also an early warning measure for national defense security in the marine field. The ocean observation network is mainly laid on the offshore coast and consists of submarine base stations and submarine cables. Each submarine base station is an information transmission node, and the aggregated information is transmitted to the coast through submarine cables. However, the flaws of submarine cables are: [0003] 1) Both laying and maintenance have certain technical difficulties; [0004] 2) Whether it is laying or maintenance, the cost is h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/516H04B10/60H04B10/80G02B19/00
CPCH04B10/502H04B10/516H04B10/60H04B10/80G02B19/0076G02B19/0009Y02D30/70
Inventor 张鹏刘传佟首峰杜扬凡于笑楠王大帅张家齐董冰
Owner CHANGCHUN UNIV OF SCI & TECH
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