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Method for reducing side lobes of line array

A linear array and side lobe technology, applied in the field of sonar, can solve problems such as low reliability and heavy workload

Active Publication Date: 2019-05-21
HAIYING ENTERPRISE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for reducing the side lobe of the linear array, to solve the problems of large workload and low reliability of the existing method for reducing the side lobe

Method used

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  • Method for reducing side lobes of line array
  • Method for reducing side lobes of line array
  • Method for reducing side lobes of line array

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Experimental program
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Embodiment 1

[0019] The invention provides a method for reducing side lobes of a linear array, comprising:

[0020] see image 3 First, several piezoelectric ceramics 3 are spliced ​​longitudinally in turn to form an array; in order to obtain smaller weight coefficients at both ends, the piezoelectric ceramics 3 are arranged in a staggered manner and keep the total length equivalent to the horizontally spliced ​​linear array.

[0021] The electrodes of the spliced ​​piezoelectric ceramics 3 are then connected with wires 4, please continue to refer to image 3 , and a wire 5 is drawn out from the positive and negative poles of the line array, and a signal is added to the wire 5 drawn out from the positive and negative poles during use.

[0022] Through the method for reducing the side lobe of the linear array provided by the present invention, the weight coefficient at the dislocation of the piezoelectric ceramic is 0.5, which can play a weighting effect. The comparison diagram of the dire...

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Abstract

The invention, which belongs to the technical field of the sonar, discloses a method for reducing side lobes of a line array. A plurality of piezoelectric ceramics are sequentially longitudinally joined to form a line array, wherein the piezoelectric ceramics are staggered and the total length is kept to be equal to the horizontally spliced line array to obtain small weight coefficients of two ends; electrode of the spliced piezoelectric ceramics are connected by wires and wires are led out from positive and negative electrodes of the line array respectively; and one path of signal is added ateach wire led out from the positive and negative electrodes in use. On the basis of the improvement of the array forming process of the linear array, the weighted matrix is obtained and natural weighting is realized; the number of signal sources is reduced to be one, so that the design of the signal source is simplified. The number of wires is also greatly reduced; the process operability is enhanced; and the reliability is greatly improved.

Description

technical field [0001] The invention relates to the technical field of sonar, in particular to a method for reducing side lobes of a linear array. Background technique [0002] As the only electroacoustic conversion part in sonar equipment, the importance of the acoustic array is self-evident. Sonar works in different ways, and the arrays of acoustic arrays are different, including linear arrays, cylindrical arrays, spherical arrays, arc arrays, and conformal arrays developed in recent years. Among them, linear arrays are most used in sonar. [0003] Such as figure 1 The directivity diagram of the line array is shown. As the main parameter of the line array, the size of its side lobe affects the signal-to-noise ratio of the sonar, which in turn affects the detection ability and the probability of false scenes. For the sonar system, the lower the side lobe is, the better it is for the sonar. Without any measures for the line array, the theoretical side lobe height is -13.3d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/521
Inventor 李勤博王洪亮黄水兵唐燕民
Owner HAIYING ENTERPRISE GROUP