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Cross-medium air-to-underwater laser-induced acoustic communication method and device

An underwater laser and communication method technology, applied in the field of optical communication and hydroacoustics, can solve the problems of high communication difficulty, poor security, and large loss of marine communication signals, so as to overcome communication difficulties, reduce signal loss, reduce The effect of the probability of data being lost or deciphered

Active Publication Date: 2021-10-26
HARBIN INST OF TECH AT WEIHAI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of traditional air-ocean communication such as large signal loss, poor security, and high communication difficulty, the present invention provides a cross-medium air-to-underwater laser-induced acoustic communication method and device

Method used

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  • Cross-medium air-to-underwater laser-induced acoustic communication method and device
  • Cross-medium air-to-underwater laser-induced acoustic communication method and device
  • Cross-medium air-to-underwater laser-induced acoustic communication method and device

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Embodiment Construction

[0061] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited.

[0062] figure 1 It shows a cross-medium air-underwater laser-induced acoustic communication system, including a transmitting system and a receiving system. The transmitting system includes a signal encoding processing module, a laser excitation and scanning control module and a laser connected in sequence. The receiving system The system includes a hydrophone, an acoustic-electric conversion module, a pre-processing amplification filtering module and a signal decoding processing module connected in sequence;

[0063] The signal encoding processing module realizes byte encoding of data information, encoding processing of pulse amplitude and time slot, and combination of amplitude and time slot frame;

[0064] The laser excitation and scanning control module realizes the triggering of the pulse signal...

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Abstract

The invention relates to the field of optical communication and the field of underwater acoustics, in particular to a cross-medium air-to-underwater laser-induced acoustic communication method and device. The time interval and energy of laser pulses emitted by a laser are controlled through digital information coding, thereby exciting laser signals with different frequencies and different characteristics; pulse laser signals are transmitted through air, so that laser energy interacts with a water medium in an optical breakdown mode after reaching the water surface, then laser pulses are converted into sound wave signals, the sound wave signals are spread in all directions underwater, and the sound wave signals are received through a hydrophone at any position underwater. Therefore, signal transmission from air to underwater is realized, information transmission is further carried out, and underwater acoustic communication is realized.

Description

Technical field: [0001] The invention relates to the field of optical communication and the field of underwater acoustics, in particular to a method and device for intermediary air-to-underwater laser-induced acoustic communication. Background technique: [0002] Marine underwater target detection will play an increasingly prominent role in future wars and national economic production, such as real-time information exchange, communication, command and control in naval warfare, and the collection of hydrological data in a certain sea area during the development of marine resources. Supervision of fishery resources, exploration of marine mineral resources, etc., and the use of appropriate air-underwater detection and communication technologies are the key and prerequisite for achieving the above goals. Since seawater absorbs a lot of electromagnetic waves (including light waves), it is difficult to be used as a remote detection tool in the ocean medium. However, sound waves h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/50H04B10/524H04B10/80H04B13/02H04B11/00
CPCH04B10/503H04B10/524H04B10/80H04B13/02H04B11/00Y02D30/70
Inventor 赵扬李鹏周志权赵占峰李迎春陈铖王军
Owner HARBIN INST OF TECH AT WEIHAI
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