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Underwater wireless voice electromagnetic communication simulating system

A communication system, wireless voice technology, applied in transmission systems, electrical components, duplex signal operation and other directions, can solve the problems of large size of low-frequency antenna, fast attenuation of electromagnetic waves, limited application occasions, etc., to increase dynamic range, power supply, etc. The effect of high utilization rate and high output power

Inactive Publication Date: 2014-01-29
HARBIN ENG UNIV
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AI Technical Summary

Problems solved by technology

As we all know, high-frequency electromagnetic waves attenuate very quickly in water, and are generally not suitable for underwater wireless transmission
In addition, in order to be able to radiate the signal, the external dimensions of the traditional low-frequency antenna must be very large, which limits its application

Method used

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  • Underwater wireless voice electromagnetic communication simulating system
  • Underwater wireless voice electromagnetic communication simulating system
  • Underwater wireless voice electromagnetic communication simulating system

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Embodiment Construction

[0033] refer to Figure 1-12 , the specific embodiment adopts the following technical scheme: it is made up of signal sending part A, signal receiving part B, sending antenna C, receiving antenna D, signal sending part A is connected with sending antenna C, and sending antenna C is connected with receiving antenna D , the receiving antenna D is connected to the signal receiving part B; the whole system is an analog system, and its realization method is as follows: the audio signal is input through the microphone 1, the rear end of the microphone 1 is connected to the front low noise amplifier circuit 2, and the front low noise amplifier circuit 2 is connected to end access band-pass filter 3, band-pass filter 3 is connected with power amplifier 4, and finally the signal is sent to the transmitting antenna C through the matching network 5; the signal receiving part B first passes through the first-stage differential amplifier circuit 9, and then successively connects Enter the ...

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Abstract

The utility model relates to an underwater wireless voice electromagnetic communication simulating system and relates to a realizing method of an underwater wireless voice electromagnetic communication system. Voice signals of the system are input by a microphone (1), the rear end of the microphone (1) is connected with a pre-posed low noise amplifier circuit (2), the rear end of the pre-posed low noise amplifier circuit (2) is connected into a band-pass filter (3), the band-pass filter (3) is connected with a power amplifier (4), and finally the signals are sent to an antenna (C) by a matching network (5); a signal receiving part (B) firstly passes through a primary difference amplifying circuit (9), and then is connected with a high-pass filter (10), a secondary amplifying circuit (11), a low-pass filter (12), an automatic gain control circuit (13) and an earphone amplifying circuit (14), and finally the voice signals are restored; and real time voice can be heard from an earphone (15). The system is good in performance, can realize short-distance real time communication function with low noise under water, and adopts a half-duplex communication manner.

Description

Technical field: [0001] The invention relates to a realization method of an underwater wireless communication system, in particular to a simulated underwater wireless voice electromagnetic communication system with low noise and short-distance communication based on current field theory. Background technique: [0002] Since the beginning of the 21st century, the research and development of underwater resources has attracted more and more attention, especially in the construction and maintenance of underwater surveys, underwater pipelines, underwater facilities, breakwaters, wharves, and underwater In the process of lifesaving and salvage, divers are often required to dive underwater for operations, so the underwater communication system is becoming more and more important. At present, in order to realize underwater communication, wire cables, sonar and optical transmission methods are mostly used. The underwater electromagnetic field communication and control method is a su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/00H04B13/02H04L5/16H04B17/391
Inventor 薛伟王朝李想赵大锋
Owner HARBIN ENG UNIV
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