Method for rarefying and optimizing energy transducer array of three-dimensional imaging sonar system

A transducer array, sparse optimization technology, applied in the re-radiation of sound waves, radio wave measurement systems, instruments, etc., can solve the problems of difficult large-scale beam calculation and large data volume.

Active Publication Date: 2010-01-13
ZHEJIANG UNIV
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Problems solved by technology

[0002] Beamforming calculation is a commonly used signal processing method in the field of signal processing. It has a wide range of applications in sonar signal processing, radar signal processing, ultrasonic detection and other fields. However, due to the large amount of data to be processed, in practical applications It is often difficult to calculate large-scale beams, and the amount of beamforming calculation is proportional to the number of transducers

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  • Method for rarefying and optimizing energy transducer array of three-dimensional imaging sonar system
  • Method for rarefying and optimizing energy transducer array of three-dimensional imaging sonar system
  • Method for rarefying and optimizing energy transducer array of three-dimensional imaging sonar system

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[0041] A sparse optimization method for a transducer array of a three-dimensional imaging sonar system according to the present invention will be described in detail through specific embodiments in conjunction with the accompanying drawings.

[0042] A sparse optimization method for the transducer array of a three-dimensional imaging sonar system. The simulated annealing algorithm is used to perform sparse optimization on the transducer array elements in the planar array to obtain a sparse transducer array, and obtain the transducer array after the sparse optimization When the beam pattern of the array satisfies both the threshold condition of the maximum sidelobe peak value and the threshold condition of the taper ratio, the minimum number of transducers that need to be turned on for the sparse transducer array is determined.

[0043] The planar array before sparse optimization is composed of M×N transducers, where M=N=48, P=Q=128, and the transducers are uniformly distributed...

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Abstract

The invention discloses a method for rarefying and optimizing an energy transducer array of a three-dimensional imaging sonar system. In the method, a simulated annealing algorithm is adopted to rarefy and optimize energy transducer array elements in a planar array to obtain a rarefied energy transducer array, and the least number of energy transducers required to be opened by the rarefied energy transducer array is worked out under a condition that a wave beam directional diagram of the rarefied and optimized energy transducer array meets the threshold value condition of a maximum side lobe peak value and the threshold value condition of a taper ratio simultaneously; the planar array before being rarefied and optimized comprises M*N energy transducers, and the energy transducers are evenly distributed in a rectangular plane according to the distance of a half wavelength or one wavelength; and the taper ratio is the specific value of the maximum weighting coefficient of the energy transducers and the minimum weighting coefficient of the energy transducers. The invention utilizes the energy transducer array elements as less as possible to realize the system objective, lowers the cost of hardware required for constructing the phase-controlled array three-dimensional image sonar system and also reduces the calculation quantity of multiplication summation required for carrying out a wave beam formation algorithm.

Description

technical field [0001] The invention relates to the technical field of phased array three-dimensional imaging sonar, in particular to a sparse optimization method for a transducer array of a three-dimensional imaging sonar system. Background technique [0002] Beamforming calculation is a commonly used signal processing method in the field of signal processing. It has a wide range of applications in the fields of sonar signal processing, radar signal processing, and ultrasonic detection. However, due to the large amount of data to be processed, in practical applications It is often difficult to perform calculations on large-scale beams, and the amount of beamforming calculation is proportional to the number of transducers. [0003] A transducer area array of a certain size is necessary for a high-resolution phased array three-dimensional image sonar system: in order to prevent large side lobes, the half-wavelength spacing array is a necessary condition; in order to obtain a ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/52G01S15/89
Inventor 陈耀武陈朋田翔
Owner ZHEJIANG UNIV
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