摘要
To optimize the acoustic field produced by phased array effectively and quickly, the pseudo-inverse method proposed previously is simplified. An approximate weight formula of sound pressure using a method of compensation to the amplitude and phase of the controlled sound pressure was presented. A multiple-focus field patterns based on the pseudo-inverse matrix algorithm can be obtained by presetting the value of the controlled sound pressure. A phased array comprised of 16 x 16 square elements is used for numerical simulation. The results show that the acoustic energy can be effectively deposited at the desired points, and the acoustic field can be synthesized quickly using the direct weight formula of the sound pressure. This study may offer an effective way for controlling the distribution of acoustic field in ultrasound hyperthermia.
To optimize the acoustic field produced by phased array effectively and quickly, the pseudo-inverse method proposed previously is simplified. An approximate weight formula of sound pressure using a method of compensation to the amplitude and phase of the controlled sound pressure was presented. A multiple-focus field patterns based on the pseudo-inverse matrix algorithm can be obtained by presetting the value of the controlled sound pressure. A phased array comprised of 16 x 16 square elements is used for numerical simulation. The results show that the acoustic energy can be effectively deposited at the desired points, and the acoustic field can be synthesized quickly using the direct weight formula of the sound pressure. This study may offer an effective way for controlling the distribution of acoustic field in ultrasound hyperthermia.
基金
supported by the National Nature Science Foundation of China(No.11174077)
Hunan Provincial Nature Science Foundation of China(No.11JJ3079)
the grant from the Science Research Program of Education Departmen of Hunan Province(No.10C1163)
