研究了超声换能器阵列驱动信号的相位调控精度对阵列聚焦声场的影响.基于开孔球面高强度聚焦超声(HIFU)阵列,提出了一种阵列驱动信号的5位量化精度相控方案,解决了相控HIFU治疗系统中驱动信号相位的非连续性调控问题.仿真结果表明,此种相控方案既使阵列声场保持了高声强的聚焦点,又维持了原有的栅瓣抑制能力,从而为相控HIFU阵列驱动系统的设计提供了可靠依据. The effect of the phasing accuracy of the ultrasonic transducer array driving signal on the array focusing sound field was studied.Based on the open-field spherical high-intensity focused ultrasound (HIFU) array, a 5-bit quantization phasing scheme of the array driving signal was proposed The phasing HIFU treatment system of the drive signal phase discontinuity control problem.The simulation results show that this phased scheme not only makes the array sound field to maintain the focus of high intensity and strong, but also maintains the original grating lobe suppression ability, Which provides a reliable basis for the design of phased HIFU array drive system.