相控阵声束焦距深度与晶片数目的优化研究

摘要

The advantages of phased array technology include flexible focus and free choice of excitation aperture. The focus depth of phased array technology is generally fixed in the actual testing process. However,the inbetween of focal depth and exci-tation aperture size exists a complex correlative and restrictive relation. Based on the phased array acoustic beam forming and fo-cusing principle,when the focal depth was 10~50 mm,the optimal excitation range of the aperture was experimentally studied by means of 32 array elements linear array transducer. It is hoped that the result can play an important role in the future inspec-tion of phased arrays.%相控阵技术的突出优点包括实现灵活聚焦和激发孔径的自由选择。相控阵技术在实际检测过程中聚焦深度一般会固定但是其聚焦深度与激发孔径的大小（即激发晶片数目的多少）之间具有复杂的相互关联和制约关系。因此基于相控阵声束形成及聚焦的原理，采用32阵元线型阵列换能器，通过实验方式研究了聚焦深度为10~50 mm时激发孔径的最佳范围。研究结果希望会对今后的相控阵检测起到重要的参考价值。