Classification method of near-field focusing distance of high-frequency sonar

A near-field focusing and focal distance technology, applied in the field of high-frequency sonar, which can solve the problems of less high-frequency sonar bins, increased system storage and overhead, etc.

Active Publication Date: 2016-08-10
杭州瑞利海洋装备有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned problems in the prior art, and to provide a binning method for the near-field focusing distance of high-frequency sonar, which solves the problem of image focusing caused by too few binning of high-frequency sonar under near-field conditions Problems or system storage and overhead caused by too many files

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  • Classification method of near-field focusing distance of high-frequency sonar
  • Classification method of near-field focusing distance of high-frequency sonar
  • Classification method of near-field focusing distance of high-frequency sonar

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[0017] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0018] This method of binning the near-field focusing distance of high-frequency sonar, by uniformly dividing the phase interval corresponding to the near-field focusing distance of high-frequency sonar, obtains the number of divisions of the near-field focusing distance, and calculates the corresponding phase interval from the divided phase sub-intervals Focus distance file, determine the focal distance of each distance file.

[0019] Specific steps are as follows:

[0020] (1) Evenly divide the phase interval corresponding to the near-field focusing distance of high-frequency sonar: divide the phase interval corresponding to the near-field focusing distance of high-frequency sonar evenly according to π / 4 or 45°, and form several phase sub-intervals A 1 、A 2 ,...,A n ; Or, the phase interval corresponding to the high-frequency sonar near-field focusing di...

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Abstract

The invention relates to a gear dividing method of high-frequency sonar near field focusing distance. The phase interval corresponding to the high-frequency sonar near field focusing distance is evenly divided to obtain the divided gear number of the near field focusing distance, and corresponding focusing distance gears are calculated according to the phase sub-intervals obtained by the dividing so as to determine the focusing distance of each distance gear. The method has the advantages that the high-frequency sonar near field focusing distance is divided scientifically and effectively to obtain a plurality of focusing distance gears, the focusing distance is determined according to the maximum and minimum phase deviation equivalence principle, corresponding beams are allocated for each distance gear to form parameters, and the problem of image focusing caused by the fact that the gears of a high-frequency image sonar under a near field condition are too few or the problem of system storage capacity and expense increasing caused by the fact that the gears are too many is solved.

Description

technical field [0001] The invention relates to the field of high-frequency sonar, more precisely, a method for classifying near-field focusing distances of high-frequency sonar. Background technique [0002] Different from common low-frequency sonars, the working distance of high-frequency sonars needs to consider the near-field conditions and divide the focusing distance. For near-field signals, it is necessary to follow the near-field focus distance classification principle of "equal sonar range, more gears close to the base array, and fewer gears far away from the base array", and determine the number of focus distance and the number of gears based on experience. The focal point for each range bin, and then configure the corresponding beamforming parameters for each range bin. Therefore, for the entire near-field focusing distance, if a sufficient quantitative analysis is not performed on the number of focusing distance bins and the resulting upper and lower boundary di...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S15/88G06F19/00
CPCG01S7/52004G01S15/02
Inventor 陈文渊沈斌坚
Owner 杭州瑞利海洋装备有限公司
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