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Underwater target depth measuring method adopting passive vertical double-vector hydrophones

A vector hydrophone and underwater target technology, which is applied in the field of underwater target depth measurement of passive vertical dual vector hydrophones, and can solve the problem of not giving placement positions and the like.

Active Publication Date: 2014-10-08
HARBIN ENG UNIV
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Problems solved by technology

But this patent just says to be placed in an appropriate position, and does not provide specific deployment position

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  • Underwater target depth measuring method adopting passive vertical double-vector hydrophones
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  • Underwater target depth measuring method adopting passive vertical double-vector hydrophones

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Embodiment Construction

[0033] The present invention will be described in further detail below according to the accompanying drawings.

[0034] The present invention is applicable to the distinction between surface ships and underwater targets, such as the distinction between surface ships and fish schools. Based on the Pekeris waveguide model and effective depth, the invention predicts the deployment depth of passive vertical double vector hydrophones, and uses PHVCA to realize the depth measurement of underwater targets, including the following steps:

[0035] (1) According to actual needs, set the interface h between the surface ship and the underwater target 1 ;

[0036] (2) According to the forecast formula, H e Represents the effective depth, the passive dual-vector hydrophone is placed vertically at the calculated depth, and the sum of the deployment depths is equal to the effective depth;

[0037] z 1 = H ...

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Abstract

The invention discloses an underwater target depth measuring method adopting passive vertical double-vector hydrophones. The method comprises the steps as follows: the two vector hydrophones which are perpendicularly arranged in water are used for receiving a sound pressure signal and a horizontal vibration velocity signal respectively; the laying depths of the two hydrophones can be obtained through calculation; the received sound pressure signal and horizontal vibration velocity signal are subjected to cross spectrum calculation; and the depth measurement is performed according to a symbol of an active component PHVCA obtained through the cross spectrum calculation, if the symbol is negative, the target is the surface ship, and if the symbol is positive, the target is the underwater target. According to the invention, the laying depths of the passive vertical double-vector hydrophones can be calculated, and the problem about the depth measurement of the underwater target is solved by the PHVCA.

Description

technical field [0001] The invention belongs to the field of underwater detection, in particular to a method for measuring the depth of an underwater target with a passive vertical double-vector hydrophone suitable for distinguishing a surface ship and an underwater target. Background technique [0002] China's oceans have a large land area and a long coastline. It is difficult to distinguish surface ships and underwater targets by conventional methods. Since the main acoustic characteristics of underwater targets are generally in the very low frequency band (10-100Hz), the main acoustic characteristics of the underwater target are still relatively obvious. Therefore, the present invention adopts very low frequency vertical dual Vector hydrophone technology for long-range depth determination of low-noise targets. [0003] At present, there are many methods for measuring the depth of underwater targets. The literature "Normal Wave Acoustic Intensity Current and Its Cross Spec...

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Application Information

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IPC IPC(8): G06F19/00G01S15/42
Inventor 殷敬伟杨光刘强张晓韩笑潘争荣
Owner HARBIN ENG UNIV
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