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Underwater target hidden distance measurement method and device by utilizing sound emitted from sperm whale

A technology of underwater target and ranging method, which is applied in the direction of measurement device, use of re-radiation, and re-radiation of sound waves, can solve the problems of complex time-frequency characteristics, non-stationary signals, and no fixed rules, and achieves the realization of reverberation. The effect of suppressing, improving the signal-to-noise ratio, and improving the ranging accuracy

Inactive Publication Date: 2015-11-11
TIANJIN UNIV
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Problems solved by technology

[0004] Explanation: Sperm whales in the ocean are social animals (see literature [1]), they will continuously send out pulse signals during their activities, the envelopes of these pulse signals change randomly, there is no fixed law, and the modulation signals in the envelope It is a complex broadband signal with non-stationary signal and complex time-frequency characteristics; therefore, it is obviously different from the conventional ranging pulse signal, and it is not easy to be identified as an active ranging pulse signal

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  • Underwater target hidden distance measurement method and device by utilizing sound emitted from sperm whale
  • Underwater target hidden distance measurement method and device by utilizing sound emitted from sperm whale
  • Underwater target hidden distance measurement method and device by utilizing sound emitted from sperm whale

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Embodiment Construction

[0028] The present invention utilizes the call signal of the sperm whale as the ranging signal, so that it can be mistaken for the call signal sent by the real sperm whale, thus playing the role of camouflage.

[0029] The purpose of the invention is to:

[0030] (1) Use the sound of sperm whales to camouflage underwater target ranging equipment to improve its concealment;

[0031] (2) Select a single pulse of sperm whale calls with high range resolution and large Doppler tolerance from a large number of sperm whale calls, and provide a good performance transmitting signal carrier for accurate measurement of underwater target distance parameters.

[0032] (3) Aiming at the characteristics of the call of the sperm whale, a numerical matched filter processing method is adopted to improve the accuracy of ranging;

[0033] (4) The frequency of the sperm whale's call is lower than that of other underwater animals (such as dolphins), so the sperm whale's call can be transmitted far...

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Abstract

The invention belongs to the field of underwater acoustic detection and provides an underwater target hidden distance measurement method and device by utilizing the sound emitted from a sperm whale, so that the defects that a conventional distance measurement signal is easy to be detected, indentified and positioned are overcome, and precise hidden measurement of distance of underwater stationary or moving targets can be realized. The technical scheme adopted in the invention is characterized in that the underwater target hidden distance measurement device by utilizing the sound emitted from the sperm whale is formed by a control and processing center, a signal generation module, a power amplifier, a sounding sensor, a hydrophone, a signal conditioning module and a data preprocessor. The method and device are mainly applied to underwater acoustic detection.

Description

technical field [0001] The invention belongs to the field of underwater sound detection, in particular to a concealed ranging method and device for an underwater target by using the cry of a sperm whale. Background technique [0002] In underwater military confrontation, the detection and positioning of underwater targets, such as frogmen, submarines, underwater glider, underwater robots, underwater combat platforms, etc. important link. Traditional active ranging methods for underwater targets generally use single-frequency rectangular pulses or linear frequency-modulated pulses as ranging signals, but these pulse signals have relatively simple and obvious characteristics of time domain, frequency domain, and time-frequency domain, such as single-frequency rectangular pulse Both the envelope of the chirp and the chirp have the characteristics of a rectangle, the frequency of the single-frequency rectangular pulse has the characteristics of a single frequency, and the frequ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/08G01S7/527
CPCG01S15/08G01S7/527
Inventor 蒋佳佳段发阶李彦超薛俊袁建富袁文澹王宪全
Owner TIANJIN UNIV
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