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Underwater wireless acousto-optic communication device and method

A communication device and acoustic communication technology, which is applied to optical fiber transmission, transmission systems, electrical components, etc., can solve the problems of high cost and high tracking and scanning requirements, and achieve the effects of low power consumption, good detection sensitivity, and low background noise.

Active Publication Date: 2013-10-02
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

Because the blue-green laser is in the low-loss window wavelength of seawater, it is suitable for underwater wireless optical communication; because of its high peak power, the pulse position modulation is widely used in long-distance laser communication, and the blue-green laser communication using pulse position modulation is especially suitable Underwater long-distance information transmission, with the continuous development of pulsed laser technology, the transmission distance and communication rate are also increasing, but pure optical communication is difficult for both sides to align with each other, and the requirements for tracking and scanning capture are high and the cost is high

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  • Underwater wireless acousto-optic communication device and method

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Embodiment Construction

[0037] The present invention will be further described below with reference to the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited by this.

[0038] The invention takes underwater wireless acousto-optic communication in a certain situation as an embodiment, adopts pulse position modulation mode and RS error correction coding, single pulse energy 0.4mJ and repetition frequency 15kHz pulsed green laser, metal-encapsulated blue-green enhanced photomultiplier As a detector, the tube can realize underwater transmission of 100 meters under Class I water quality, the communication rate is over 100kbps, and it can transmit data, voice and video multimedia data.

[0039] First, please refer to figure 1 , figure 1 It is a schematic diagram of the overall structure and internal logic functional unit of the underwater wireless acousto-optic communication device and method of the present invention. Depend on figure 1 It can ...

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Abstract

The invention discloses an underwater wireless acousto-optic communication device and method. The underwater wireless acousto-optic communication device comprises a water depth and posture measurement module, an acoustic communication module, a main control panel, a theodolite, a pulse blue-green laser, a laser emission telescope, a receiving telescope, a photoelectric detection and signal conditioning module and a high-speed data acquisition module. The underwater wireless acousto-optic communication device comprehensively utilizes the characteristics of an acoustic signal which is low in rate, but large in sidelobe and long in transmission distance and the characteristics of an optic signal which is high in communication rate, good in directivity and longer in transmission distance, realizes underwater high-speed information transmission in a longer distance, and has the characteristics of small size, light weight, high integration level, good reliability and high performance-cost ratio.

Description

technical field [0001] The invention relates to underwater communication, in particular to an underwater wireless acousto-optic communication device and a communication method. The communication device and method can realize wireless transmission of information in a marine environment, and can be used not only for data transmission, but also for It can transmit multimedia information such as voice, image and video, and can be widely used in various underwater applications. Background technique [0002] The ocean accounts for nearly 70% of the earth's surface area. With the continuous development and utilization of the ocean by human beings, how to achieve effective communication in the depths of the ocean under seawater has become a difficult problem. Due to the skin effect of seawater, it is difficult to use wireless communication in the depths of the sea, and the loss of sound waves in seawater is very small. Therefore, the current underwater communication mainly adopts th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B13/02H04B10/25
Inventor 周田华贺岩朱小磊陈卫标
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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