【摘要】 目的 :用实验方法分析非脱气水对 HIFU探头声场分布的影响。方法 :将水听器和 HIFU探头固定在手动三维移动装置中 ,整套系统置于吸声水槽中 ,水听器可以在三个方向进行移动 ,水听器的测量值从 U字示波器读出。结果与结论 :在较低的驱动电压 (小于 30 0 V)下 ,声场分布曲线比较平滑 ,接近理论值 ;随着驱动电压升高(30 0～ 40 0 V) ,声场分布曲线不再保持良好的连续性 ;当驱动电压升高到 6 0 0 V时 ,水听器由于灵敏度降低或被连续声场打偏 ,使轴向声场在峰值附近变化极为缓慢 ,纵向声场分布的对称性被破坏更多还原

【Abstract】 Objective:To investigate what non degassed water influence on HIFU probe ultrasonic field.Methods:To fasten transducer and ultrasonic probe on the manual three dimension removable equipment,and put these into absorbed ultrasound flume.Transducer can be moved in three dimensions,and its measured value will be got with the oscillograph.Results and Conclusions:Ultrasonic field distributed curve is smooth and approaches theory value in lower driving voltage(less than 300V).Following driving voltage increasing(between 300V and 400V),ultrasonic field distributed curve doesnt keep favorable continuity.When driving voltage is added up to 600V,axis ultrasound field changes more slowly and symmetry of portrait ultrasound field is destroyed round ultrasound peak value for sensitivity of transducer reduced or trained off by continuum ultrasound field.更多还原