A novel method to design sparse linear arrays for ultrasonic phased array

被引：27
作者：
Yang, Ping [1 ]
Chen, Bin [1 ]
Shi, Ke-Ren [1 ]
机构：
[1] Tsing Hua Univ, Dept Mech Engn, NDT Lab, Beijing 100084, Peoples R China
来源：
ULTRASONICS | 2006年 / 44卷
关键词：
ultrasonic phased array; sparse array; genetic algorithm; minimum redundancy linear array;
D O I：
10.1016/j.ultras.2006.05.131
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
In ultrasonic phased array testing, a sparse array can increase the resolution by enlarging the aperture without adding system complexity. Designing a sparse array involves choosing the best or a better configuration from a large number of candidate arrays. We firstly designed sparse arrays by using a genetic algorithm, but found that the arrays have poor performance and poor consistency. So, a method based on the Minimum Redundancy Linear Array was then adopted. Some elements are determined by the minimum-redundancy array firstly in order to ensure spatial resolution and then a genetic algorithm is used to optimize the remaining elements. Sparse arrays designed by this method have much better performance and consistency compared to the arrays designed only by a genetic algorithm. Both simulation and experiment confirm the effectiveness. (c) 2006 Elsevier B. V. All rights reserved.
引用
收藏
页码：E717 / E721
页数：5
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