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Two-dimension scattering property measuring method for underwater movement objective

A technology of underwater moving targets and scattering characteristics, which is applied in the direction of measuring devices, sound wave re-radiation, radio wave measurement systems, etc., can solve the problems of difficult deployment, cost increase, and difficulty in practical use, and achieve simple equipment and easy deployment. convenient effect

Active Publication Date: 2009-02-18
NAVAL UNIV OF ENG PLA
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Problems solved by technology

[0003] (1) In order to improve the measurement resolution of underwater target scattering characteristics, it is necessary to establish a large-scale real-aperture sonar array, which brings about an increase in cost and difficulties in deployment;
[0004] (2) The real aperture method is difficult to obtain the two-dimensional high-resolution scattering characteristics of long-distance targets
This method requires a high signal-to-noise ratio and is difficult to be practical

Method used

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  • Two-dimension scattering property measuring method for underwater movement objective
  • Two-dimension scattering property measuring method for underwater movement objective
  • Two-dimension scattering property measuring method for underwater movement objective

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Embodiment Construction

[0032] The schematic diagram of the invention is as figure 1 As shown in the figure, 1 represents the sonar array and 2 represents the target.

[0033] In this embodiment, a single receiving array is used, the sonar base array is fixed, and the target moves in a uniform straight line at a rate of V, and there is three-dimensional angular motion, including pitch, yaw, and roll. The linear movement direction of the target is parallel to the sonar array. Assuming that the sonar array is co-located for transmitting and receiving, the shortest distance between the sonar array and the target is r. Figure 4 As shown in the figure, 1 represents the sonar array, 2 represents the target, and I, II, and III represent pitch, yaw, and roll, respectively.

[0034] Taking a scattering point P on the target as an example, the specific process of this embodiment is as follows:

[0035] (1) Design the signal source to generate the gated signal and the chirp narrowband signal according to the prede...

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Abstract

The invention belongs to the target two-dimension scattering property measurement field, which is related to a two-dimension scattering property measuring method for the underwater moving target. The measuring method is characterized in that an active sonar receiving array and an emission array are firmly fixed, the emission array transmits signals, the receiving array receives echo of the underwater line moving target of which the moving direction and the moving speed are known, the received echo signal can be disposed through the synthetic aperture imaging, so as to obtain the two-dimension high resolution scattering property of the target in distance and direction. The measuring method has the advantages that utilizing small-size basic matrix can obtain the two-dimension high resolution scattering property of the underwater target, the equipment is simple, and the underwater part can be easily arranged.

Description

Technical field [0001] The invention belongs to the field of measuring the two-dimensional scattering characteristics of underwater targets, and relates to a method for measuring the two-dimensional scattering characteristics of underwater moving targets by using the principle of synthetic aperture. Background technique [0002] At present, the measurement research of the scattering characteristics of underwater targets mainly adopts the method based on real aperture. In actual application of this method, there are the following problems: [0003] (1) In order to improve the measurement resolution of the scattering characteristics of underwater targets, it is necessary to build a large-scale real-aperture sonar array, which brings about cost improvement and deployment difficulties; [0004] (2) The real aperture method is difficult to obtain the two-dimensional high-resolution scattering characteristics of long-distance targets. [0005] Using synthetic aperture technology can so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/89G01S7/539
Inventor 唐劲松李桂娟刘丹丹陈云飞魏国珩曹颖张森王铮
Owner NAVAL UNIV OF ENG PLA
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