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Method and device of concealment speed measurement of underwater moving target based on ticking sounds emitted by sperm whale

A technology for underwater moving targets and underwater targets, applied in the field of concealed speed measurement of underwater moving targets, can solve the problems of threats to the viability of speed measuring devices, complex time-frequency characteristics, and no fixed rules, so as to improve the ability of camouflage and concealment, reduce The probability of being intercepted, the effect of improving the camouflage ability

Active Publication Date: 2015-11-04
TIANJIN UNIV
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Problems solved by technology

[0002] Velocity signal waveforms of traditional underwater moving targets (such as mines, submarines, and underwater glider), such as single-frequency rectangular pulse (Continuous Wave, CW), linear frequency modulation (Linear Frequency Modulation, LFM) pulse and other signals, have relatively simple and relatively Obvious characteristics of time domain, frequency domain and time-frequency domain, for example, their time domain envelope is rectangular or rectangular string, LFM signal waveform is similar to rectangular in frequency domain, CW pulse modulation signal is a single frequency signal, LFM pulse The frequency of the modulation signal changes linearly, etc., so they are easily intercepted, identified and located by the enemy's reconnaissance system, thus posing a serious threat to the survivability of the speed measuring device
[0003] Sperm whales in the ocean are social animals (see Hal Whitehead and Linda Weilgart, Patterns of visually observable behavior and vocalizations in groups of female sperm whales [J], Behaviour, 118(3 / 4): 275-296, 1991), and they live in During underwater activities, different pulse signals will be continuously sent to the water; the time-domain envelope of these pulse signals changes randomly, without fixed rules, and the modulated signal in the envelope is a complex broadband signal, the signal is not stable, and the time-frequency characteristics Complicated; therefore, there is a clear difference from the conventional speed pulse signal, and it is not easy to be recognized by the enemy as an active speed pulse signal

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  • Method and device of concealment speed measurement of underwater moving target based on ticking sounds emitted by sperm whale
  • Method and device of concealment speed measurement of underwater moving target based on ticking sounds emitted by sperm whale
  • Method and device of concealment speed measurement of underwater moving target based on ticking sounds emitted by sperm whale

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Embodiment Construction

[0028] In order to overcome the deficiencies of the prior art, the present invention provides a method and device for concealed speed measurement of underwater moving targets based on the ticking sound of sperm whales. It can not only overcome the shortcomings of conventional speed measurement signals that are easy to be detected, identified and positioned, but also realize Covert measurement of the velocity of a moving object.

[0029] The present invention has following advantages: (1) utilize sperm whale tick pulse (as figure 1 As shown) to camouflage the underwater moving target speed measuring device to improve its concealment; (2) to combine the sperm whale tick pulse with the block Doppler speed measuring method ingeniously to realize the concealed and effective measurement of underwater moving targets; (3) Many different ticking pulses are used instead of one or several ticking pulses to realize the measurement of the speed of the underwater moving target, so as to fur...

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Abstract

The present invention belongs to the field of underwater acoustic detection. On the basis of improvement of abilities of an active speed measurement device to camouflage and conceal, the speed measurement of an underwater moving target is realized. Therefore, the technical scheme of the invention is that: based on the method and device of concealment speed measurement of an underwater moving target based on ticking sounds emitted by a sperm whale, the device consists of a speed measurement demand analysis module, a signal generation module, a power amplifier module, a transducer, a hydrophone, a signal conditioning module and a data processing and display module, wherein the speed measurement demand analysis module receives practical application demand of speed measurement of the underwater moving target and selects and constructs appropriate combination of ticking sound pulses emitted by the sperm whale for speed measurement of the underwater moving target according to the application demand. The method and device of present invention is 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 speed measurement method and device for an underwater moving target based on the ticking sound of sperm whales. Background technique [0002] Velocity signal waveforms of traditional underwater moving targets (such as mines, submarines, and underwater glider), such as single-frequency rectangular pulse (Continuous Wave, CW), linear frequency modulation (Linear Frequency Modulation, LFM) pulse and other signals, have relatively simple and relatively Obvious characteristics of time domain, frequency domain and time-frequency domain, for example, their time domain envelope is rectangular or rectangular string, LFM signal waveform is similar to rectangular in frequency domain, CW pulse modulation signal is a single frequency signal, LFM pulse The frequency of the modulated signal changes linearly, etc. Therefore, they are easily intercepted, identified and locate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/58
CPCG01S15/582
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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