【摘要】 通过对被控点声压进行幅值和相位补偿,得到了一个简化的声压加权公式.应用该公式预设被控点声压值,结合改进的伪逆矩阵算法得到振源的振幅和相位.基于该合成模式,设计了一个由10×10个小正方形阵元构成的平面相控阵,并对多焦点声场的合成进行了数值仿真.结果表明,该方法可提高声能在目标点的沉积能力,具有较高的声场合成效率,为超声热疗中声聚焦控制提供了一条有效的途径.更多还原

【Abstract】 An approximate weighting formula of acoustic pressure with method of compensation to the amplitude and phase of the controlled acoustic pressure is given in this paper.A synthesis pattern based on the pseudo-inverse matrix algorithm can be obtained by presetting the value of the controlled acoustic pressure. A planar phased array comprised of10 × 10 square elements is used for numerical simulation. The results show that the sound energy can be effectively deposited at the desired points. This study may offer an effective way for controlling the distribution of acoustic field in ultrasound hyperthermia.更多还原