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Communication method and system for underwater vehicle based on underwater optical cable

A technology for underwater vehicles and underwater optical cables, which is applied in optical transmission systems, optical fiber transmission, etc., can solve problems such as many technical and principle problems and long research and development cycles, and achieve good invulnerability, strong concealment, and electronic resistance. strong interference effect

Active Publication Date: 2015-08-26
FUDAN UNIV
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Problems solved by technology

Since the 1980s, some new technologies have been proposed one after another, such as neutrino communication technology and blue-green laser technology. There is also the need to build a new land-based station, which requires the support of space-based aircraft and satellites. The research and development cycle is long and there are many technical and principle problems , it is difficult to fill the technical and equipment gaps in the underwater communication of the vehicle in a relatively economical and convenient way within a limited time

Method used

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  • Communication method and system for underwater vehicle based on underwater optical cable
  • Communication method and system for underwater vehicle based on underwater optical cable
  • Communication method and system for underwater vehicle based on underwater optical cable

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Embodiment Construction

[0038] In this example, the use of figure 2The interference structure shown. Coupler 8 uses a 3××3 split coupler, and coupler 9 uses a split 2×2 coupler, both of which are produced by Wuhan Institute of Posts and Telecommunications; the optical fiber delay coil 10 is wound with a single-mode optical fiber ; Feedback device 5 selects the optical fiber reflector that end plated reflective film is made for use; What light source adopts is the SLD light source that center wavelength is 1300nm, is produced by 44 Research Institute of Electronics Group Corporation. Select a redundant core in the underwater optical cable, one end of which is connected to the port 9b1 of the coupler 9, and the other end is connected to the optical fiber reflector. The optical fiber interference assembly 2 needs to be placed in a soundproof device to shield external interference. The light source is input from the port 8a1 of the fiber coupler 8, and the interference signal is output from the ports ...

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Abstract

The invention belongs to the technical field of optical fiber sensing and secret communication, and particularly discloses an underwater optical cable-based underwater vehicle communication method and a system. In the method, an existing underwater optical cable is used as an acoustic sensor to construct an underwater passive voice sensing system which is used for receiving acoustic signals sent to the underwater passive voice sensing system by an underwater vehicle, transmitting light waves carrying the acoustic signals to an overland base station, and restoring the signals by using demodulating equipment to achieve the aim of one-way communication. The demodulating equipment has confidentiality and uniqueness. The technique has the characteristics of high communication depth, high survivability, strong concealing property, communication anti-jamming, strong confidentiality, real-time, and high speed. By using the method provided by the invention, an optical cable sensing network can be newly set up, and also an existing underwater optical cable network system can be used for constructing a passive voice receiving network all over the ocean to realize the one-way communication between the underwater vehicle and the overland base station.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing and secure communication, and in particular relates to a method and system for realizing one-way communication between an underwater vehicle and a shore-based base station on the basis of an underwater optical cable laid underwater. Background technique [0002] The communication of underwater vehicles, especially the communication in the deep submerged state, has always been a recognized problem. Due to the rapid attenuation of short waves in water, the communication between water and shore mainly relies on long wave and very long wave communication, mainly passive reception, that is, underwater vehicles surface or extend the receiving antenna according to the specified frequency within the specified time. Get out of the water and receive messages from the shore. However, sometimes the underwater vehicle needs to actively communicate with the land command. At this time, it is neces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/25H04B10/80
Inventor 唐璜肖倩赵栋吴红艳
Owner FUDAN UNIV
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