Search
Now showing items 1-10 of 98
Sparse Array Design Using the Genetic Algorithm for Optimizing the Radiation Pattern of Linear Arrays
(2019-01-01)
The genetic algorithm was used to obtain sparse arrays with 8, 16, 32 and 64 transducers in a possible aperture size of 128 elements. The optimization was made by minimizing a fitness function that takes into account the ...
Design of 2D planar sparse binned arrays based on the Coarray analysis
(2021-12-01)
The analysis of the beampattern is the base of sparse arrays design process. However, in the case of bidimensional arrays, this analysis has a high computational cost, turning the design process into a long and complex ...
Design of ultrasonic synthetic aperture imaging systems based on a non-grid 2D sparse array
(2021-12-01)
This work provides a guide to design ultrasonic synthetic aperture systems for non-grid two-dimensional sparse arrays such as spirals or annular segmented arrays. It presents an algorithm that identifies which elements ...
A New Fitness Function for Sparse Linear Array Evaluation Based on the Point Spread Function
(2021-01-01)
This work proposes a new fitness function for sparse linear array design using the Point Spread Function (PSF), where the energy and entropy are combined. The Arithmetic optimization Algorithm is used as a search mechanism, ...
Optimization in ultrasonic imaging systems: Use of metaheuristics to design sparse arrays and a heuristic to create an acquisiton system
(Universidade Estadual Paulista (Unesp), 2022-09-02)
Ultrasonic images have an important contribution to medical diagnosis and nondestructive testing. One strategy to generate an image is to use an array, which is a transducer composed of a set of piezoelectric elements, ...
Técnicas para obtenção de arrays lineares esparsos usando algoritmo genético
(Universidade Estadual Paulista (Unesp), 2018-08-31)
O ultrassom pode ser utilizado para gerar imagens aplicadas aos ensaios não destrutivos (END) e diagnóstico médico, em que arrays são utilizados para obter imagens com melhor resolução lateral e contraste em relação a um ...
Sparse arrays and image compounding techniques for non-destructive testing using guided acoustic waves
(2013-06-01)
Piezoelectric array transducers applications are becoming usual in the ultrasonic non-destructive testing area. However, the number of elements can increase the system complexity, due to the necessity of multichannel ...
Sparse arrays and image compounding techniques for non-destructive testing using guided acoustic waves
(2013-06-01)
Piezoelectric array transducers applications are becoming usual in the ultrasonic non-destructive testing area. However, the number of elements can increase the system complexity, due to the necessity of multichannel ...
On sparse methods for array signal processing in the presence of interference
(Institute Of Electrical And Electronics Engineers, 2015)