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Passive positioning method for single hydrophone by combining waveguide invariant and line spectrum

A technology of waveguide invariance and single hydrophone, which is applied in the direction of beacon systems using ultrasonic/sonic/infrasonic waves, which can solve the problems of inaccurate results and achieve the effect of small error results

Inactive Publication Date: 2017-03-29
THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP
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Problems solved by technology

However, it simplifies the motion model in the estimation process, resulting in inaccurate results

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  • Passive positioning method for single hydrophone by combining waveguide invariant and line spectrum
  • Passive positioning method for single hydrophone by combining waveguide invariant and line spectrum
  • Passive positioning method for single hydrophone by combining waveguide invariant and line spectrum

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the drawings and embodiments:

[0021] The single hydrophone passive positioning method of the present invention that combines waveguide invariance and line spectrum uses the continuous spectrum and line spectrum of the target radiation to jointly estimate the sound source distance, and first uses the continuous spectrum to interfere with hyperbolic bright lines. The coupling parameters of the sound source are estimated, the relative velocity of the target is estimated through the line spectrum, and the relative velocity information of multiple times is used to fit the true velocity of the sound source. Finally, the motion coupling parameters are combined with the motion speed, and then the target motion model is combined to estimate the distance of the sound source at different moments.

[0022] (1) Interference fringe analysis

[0023] The specific motion form of the target is given below, assuming ...

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Abstract

The invention provides a passive positioning method for a single hydrophone by combining a waveguide invariant and a line spectrum. The passive positioning method mainly comprises the steps of estimating the distance of a sound source by utilizing a continuous spectrum and a line spectrum of radiation of a target in a combined manner, firstly estimating a coupling parameter of the sound source by using the continuous spectrum through hyperbolic bright fringes, then estimating the relative speed of the target through the line spectrum, and then fitting real speed of the sound source by using relative speed information of multiple times; and finally combining a motion coupling parameter and the motion speed, and estimating the distance of the sound source at different moments in a combined target motion model. The passive positioning method has the beneficial effects that the distance of a sound source at different moments can be accurately estimated in a uniform rectilinear motion model, and the method is only applicable to one hydrophone compared with an existing method that double array elements utilize a geometrical relationship between the array elements and a vector hydrophone to estimate a course angle. In addition, the passive positioning method does not need to estimate a course angle of the target, thereby being more concise.

Description

Technical field [0001] The invention belongs to the field of underwater acoustic technology and sonar signal processing, and particularly relates to a passive positioning method for a single hydrophone that combines waveguide invariance and line spectrum. Background technique [0002] Underwater acoustic technology has developed rapidly in recent years, but it is also accompanied by new problems and challenges. With the emergence of quiet submarines, the radiated noise of submarines in high frequency bands is getting lower and lower, which brings great difficulties to submarine detection. However, quiet submarines are not quiet at very low frequencies, and their radiated noise is relatively large, so the quiet submarines can be detected from the detection of low-frequency signals. Common passive ranging methods include three-array element ranging and matching field ranging. These methods require multiple array elements and require marine environment information, which are not su...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S1/76
CPCG01S1/76
Inventor 王超王忠康
Owner THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP
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